阅读说明：本技术 具有减少的致动延迟时间的离合器式动力传输装置 (The clutch type power transmission device of Actuation delays time with reduction ) 是由 罗伯特·S·克莱因哈特 约翰·C·希布勒 查理斯·G·斯图亚特 于 2016-03-10 设计创作，主要内容包括：本发明公开了具有减少的致动延迟时间的离合器式动力传输装置。动力传输部件可包括摩擦式离合器、液压油缸、泵、流体存储装置和阀。所述液压油缸可具有活塞室和能在所述活塞室中在第一位置和第二位置之间移动以与所述摩擦式离合器接合的活塞。所述泵的第一入口/出口可与储液器流体联接。所述流体存储装置可容纳加压液压流体。所述阀可与活塞室、泵的第二入口/出口和流体存储装置流体联接。当处于第一模式时,所述阀可允许泵和流体存储装置之间的流体连通,阻止所述活塞室和泵之间的流体连通,并且阻止所述活塞室和所述流体存储装置之间的流体连通。当处于第二模式时,所述阀可允许所述泵、所述流体存储装置和所述活塞室之间的流体连通。(The invention discloses the clutch type power transmission devices of the Actuation delays time with reduction.Power transmission component may include slip clutch, hydraulic cylinder, pump, fluid storage device and valve.The hydraulic cylinder can have piston chamber and can move between the first position and the second position the piston to engage with the slip clutch in the piston chamber.First entrance/outlet of the pump can couple with reservoir fluid.The fluid storage device can accommodate pressurized hydraulic fluid.The valve can couple with piston chamber, second entrance/outlet of pump and fluid storage device fluid.When being in first mode, the valve allows the fluid communication between pump and fluid storage device, prevents the fluid communication between the piston chamber and pump, and prevent the fluid communication between the piston chamber and the fluid storage device.When in the second mode, the valve allows the fluid communication between the pump, the fluid storage device and the piston chamber.)

1. a kind of power transmission component, comprising:

Slip clutch, the slip clutch have multiple first clutch pieces and intersect with the first clutch piece Multiple second clutch pieces；

Liquid storage device, the liquid storage device are configured as accommodating hydraulic fluid；

Hydraulic cylinder, the hydraulic cylinder couple with the slip clutch, and the hydraulic cylinder has piston chamber and can be in institute The piston moved between the first position and the second position in piston chamber is stated, the piston described in the first position is relative to described First clutch piece and the second clutch piece retract, and the piston described in the second position is towards the first clutch piece The degree that the first position Shi Geng great is in than the piston is extend out to the second clutch piece；

Pump, the pump have first entrance/outlet and a second entrance/outlet, the second entrance/outlet it is coupled with the work It fills in room to be in fluid communication, the pump can be operated with forward mode and rp mode, pumped and be configured as described in the forward mode Fluid is pumped to the second entrance/outlet from the first entrance/outlet, pumps and is configured as described in the reverse mode Fluid is pumped to the first entrance/outlet from the second entrance/outlet；

Fluid storage device, the fluid storage device are configured as accommodating a certain amount of pressurized hydraulic fluid；

First valve components, first valve components are arranged between the fluid storage device and the piston chamber, first valve member Part is configured as allowing the fluid communication from the fluid storage device to the piston chamber；

Second valve components, second valve components are arranged between the first entrance/outlet and the fluid storage device, this Two valve components are configured as allowing from the first entrance/export to the fluid communication of the fluid storage device, and prevent From the fluid storage device to the fluid communication of the first entrance/outlet；With

Third valve components, the third valve components are arranged between the first entrance/outlet and the liquid storage device, the third valve member Part is configured as allowing the fluid communication from the liquid storage device to the first entrance/outlet；

Wherein, first valve components, second valve components and the third valve components are configured as: when with the direct die When formula operates, allow the pump that hydraulic fluid is pumped to the piston chamber from the liquid storage device, and when with the reversed mould When formula operates, allow the pump that hydraulic fluid is pumped to the fluid storage device from the piston chamber.

2. power transmission component according to claim 1 further includes leak-off pipe, the leak-off pipe it is coupled with the piston Room is connected to the reservoir fluid.

3. power transmission component according to claim 1 further includes leak-off pipe, the leak-off pipe it is coupled with the fluid Storage device is connected to the reservoir fluid.

4. power transmission component according to claim 1, wherein first valve components, second valve components and institute The element that third valve components are the first valve is stated, first valve can be operated selectively in the first mode and a second mode, In when being in the first mode, first valve allows from the first entrance/export to the fluid storage device It is in fluid communication, and prevents fluid communication between the liquid storage device and the pump and the fluid storage device and the work The fluid communication between room is filled in, wherein when being in the second mode, first valve allows the liquid storage device and described the Fluid communication between one inlet/outlet, and allow the fluid communication between the fluid storage device and the piston chamber.

5. power transmission component according to claim 1, wherein the fluid storage device includes displaceable element, should Displaceable element limits second chamber, and is configured as applying pressure on the hydraulic fluid in the second chamber, described Second chamber is coupled to be in fluid communication with first valve components and second valve components.

6. power transmission component according to claim 1, wherein first valve components are the element of first valve, First valve can be operated selectively in the first mode and a second mode, wherein described when being in the first mode First valve is prevented from the fluid storage device to the fluid communication of the piston chamber, and when being in the second mode, First valve allows from the fluid storage device to the fluid communication of the piston chamber.

7. a kind of power transmission component, comprising:

Slip clutch, the slip clutch have multiple first clutch pieces and intersect with the first clutch piece Multiple second clutch pieces；

Liquid storage device, the liquid storage device are configured as accommodating hydraulic fluid；

Hydraulic cylinder, the hydraulic cylinder couple with the slip clutch, and the hydraulic cylinder has piston chamber and can be in institute The piston moved between the first position and the second position in piston chamber is stated, the piston described in the first position is relative to described First clutch piece and the second clutch piece retract, and the piston described in the second position is towards the first clutch piece The degree that the first position Shi Geng great is in than the piston is extend out to the second clutch piece；

Pump, the pump have first entrance/outlet and a second entrance/outlet, the first entrance/outlet it is coupled with the storage Liquid device is in fluid communication, also, the second entrance/outlet is coupled to be in fluid communication with the piston chamber；

Fluid storage device, the fluid storage device are configured as accommodating a certain amount of pressurized hydraulic fluid；

First valve components, first valve components are arranged between the fluid storage device and the piston chamber, first valve Element is configured as allowing from the second entrance/export to the fluid communication of the fluid storage device, and prevents from institute State fluid storage device to the piston chamber and the second entrance/outlet fluid communication；With

Second valve components, second valve components are arranged between the fluid storage device and the piston chamber, second valve Element is configured as allowing the fluid communication from institute's fluid storage device to the piston chamber, and prevent from the piston chamber and The fluid communication of the second entrance/the export to fluid storage device.

8. power transmission component according to claim 7, wherein first valve components are configured as: when the piston When the pressure of room is less than predetermined pressure, the fluid communication from the second entrance/the export to fluid storage device is prevented.

9. power transmission component according to claim 7 further includes leak-off pipe, the leak-off pipe it is coupled with the piston Room is connected to the reservoir fluid.

10. power transmission component according to claim 7, wherein the pump can be grasped with forward mode and reverse mode Make, the pump is configured as that hydraulic fluid is pumped to the piston chamber from the liquid storage device when with forward mode operation With first valve components, and it is configured as pumping hydraulic fluid from the piston chamber when with the reverse mode operation To the liquid storage device.

11. power transmission component according to claim 7, wherein the fluid storage device includes displaceable element, should Displaceable element limits second chamber, and is configured as applying pressure on the hydraulic fluid in the second chamber, described Second chamber is coupled to be in fluid communication with first valve components and second valve components.

12. power transmission component according to claim 7, wherein first valve components and second valve components are The element of first valve, first valve can be operated selectively in the first mode and a second mode, wherein when in described the When one mode, first valve components are prevented from the fluid storage device to the fluid communication of the piston chamber, and when place When the second mode, second valve components prevent the stream from the second entrance/the export to fluid storage device Body connection.

Technical field

This disclosure relates to the clutch type power transmission device with the reduced Actuation delays time.

Background technique

The part provides background information relevant to the disclosure, the not necessarily prior art.

Hydraulic operated clutch generally includes piston, which engages multiple clutch disc to clutch system applied force. In order to enable the clutch disc reaches the maximum separation for low-resistance torque (drag torque), the piston must be from connecing Chalaza retracts sizable distance.In general, in order to enable the piston is mobile rapidly to engage institute from fully retracted position Clutch disc is stated, during this initial activation, needs hydraulic fluid flow at high speed to the piston.Due in the piston The initial moving process in, the clutch disc does not engage, so, the fluid can be provided with lower pressure.Once institute It states clutch disc to start to engage, the piston has lesser distance to be moved before the clutch is fully engaged, therefore, no High flow rate is needed again.Instead, higher pressure is needed, the clutch disc is pushed to and is fully engaged.

In general, by fixed displacement hydraulic pump (fixed displacement hydraulic pump) (for example, Gerotor pump (gerotor pump)) pressure that generates is directly related with the input torque of the pump, and the fluid displacement inversely related with the pump, Meanwhile flow velocity is directly related with the fluid displacement of the pump and velocity of rotation.Thus it can be difficult to being kept fixed displacement pump Succinct, inexpensive and robustness while meet the needs of to low energy consumption, high flow rate and high pressure.

Summary of the invention

The part provides the substantially summary of the disclosure, not comprehensive public affairs of disclosure full scope or all features of the disclosure It opens.

This religious doctrine provides a kind of power transmission component, which includes slip clutch, liquid storage device, hydraulic Oil cylinder, pump, fluid storage device and the first valve.The slip clutch can have multiple first clutch pieces and can with it is described Multiple second clutch pieces that first clutch piece intersects.The liquid storage device can be configured to accommodate hydraulic fluid.It is described hydraulic Oil cylinder can couple with the slip clutch.The hydraulic cylinder can have piston chamber and can be in the piston chamber first The piston moved between position and the second position, the piston described in the first position can relative to the first clutch piece and The second clutch piece retracts, the piston described in the second position can towards the first clutch piece and described second from Clutch piece extend out to the degree that the first position Shi Geng great is in than the piston.The pump can have first entrance/outlet With second entrance/outlet.First entrance/the outlet can be coupled to be connected to the reservoir fluid.The fluid storage Device can be configured to accommodate a certain amount of pressurized hydraulic fluid.First valve can be coupled with the piston chamber, described Second entrance/the outlet of pump and the fluid storage device are in fluid communication.First valve can be by the first pattern with Two modes operation.First valve can be configured to: when first valve is in the first mode, allow the pump and institute The fluid communication between fluid storage device is stated, the fluid communication between the piston chamber and the pump is prevented, and prevents institute State the fluid communication between piston chamber and the fluid storage device.First valve can be configured to: at first valve When the second mode, allow the fluid communication between the pump, the fluid storage device and the piston chamber.

This religious doctrine also provides a kind of power transmission component, which includes slip clutch, liquid storage device, liquid Compressing cylinder, pump, fluid storage device, the first valve, the second valve and third valve.The slip clutch can have multiple first from Clutch piece and the multiple second clutch pieces that can intersect with the first clutch piece.The liquid storage device can be configured to accommodate liquid Press fluid.The hydraulic cylinder can couple with the slip clutch.The hydraulic cylinder can have piston chamber and can be in institute The piston moved between the first position and the second position in piston chamber is stated, the piston described in the first position can be relative to institute It states first clutch piece and the second clutch piece retracts, the piston described in the second position can be towards first clutch Device piece and the second clutch piece extend out to the degree that the first position Shi Geng great is in than the piston.The pump can have There are first entrance/outlet and second entrance/outlet.Second entrance/the outlet can be coupled to connect with piston chamber's fluid It is logical.The pump can be operated with forward mode and rp mode.In the first mode, the pump can be configured to by fluid from First entrance/the outlet is pumped to the second entrance/outlet.In the reverse mode, the pump can be configured to flow Body is pumped to the first entrance/outlet from the second entrance/outlet.The fluid storage device can be configured to receiving one Quantitative pressurized hydraulic fluid.First valve components may be provided between the fluid storage device and the piston chamber.Institute Stating the first valve components can be configured to allow fluid communication from the fluid storage device to the piston chamber.Second valve Element may be provided between the first entrance/outlet and the fluid storage device.Second valve components can be configured to Allow from the first entrance/export to the fluid communication of the fluid storage device, and can prevent to store from the fluid Fluid communication of the device to the first entrance/outlet.The third valve components may be provided at the first entrance/outlet and institute It states between liquid storage device.The third valve components can be configured to allow the stream from the liquid storage device to the first entrance/outlet Body connection.First valve components, second valve components and the third valve components can be configured to: when with the direct die When formula operates, allow the pump that hydraulic fluid is pumped to the piston chamber from the liquid storage device, and when with the reversed mould When formula operates, allow the pump that hydraulic fluid is pumped to the fluid storage device from the piston chamber.

This religious doctrine also provides a kind of power transmission component, which includes slip clutch, liquid storage device, liquid Compressing cylinder, pump, fluid storage device, the first valve components and the second valve components.The slip clutch can have multiple first Clutch disc and the multiple second clutch pieces that can intersect with the first clutch piece.The liquid storage device can be configured to accommodate Hydraulic fluid.The hydraulic cylinder can couple with the slip clutch.The hydraulic cylinder can have piston chamber and can be The piston moved between the first position and the second position in the piston chamber, the piston described in the first position can be relative to The first clutch piece and the second clutch piece retract.The piston described in the second position can towards described first from Clutch piece and the second clutch piece extend out to the degree that the first position Shi Geng great is in than the piston.The pump can With first entrance/outlet and second entrance/outlet.First entrance/the outlet can be coupled with the reservoir fluid Connection.Second entrance/the outlet can be coupled to be in fluid communication with the piston chamber.The fluid storage device can be configured To accommodate a certain amount of pressurized hydraulic fluid.First valve components may be provided at the fluid storage device and the piston chamber Between.First valve components can be configured to allow the fluid from the second entrance/the export to fluid storage device Connection, and prevent from the fluid storage device to the piston chamber and the fluid communication of the second entrance/outlet.It is described Second valve components may be provided between the fluid storage device and the piston chamber.Second valve components can be configured to permit Perhaps from institute's fluid storage device to the fluid communication of the piston chamber, and prevent from the piston chamber and the second entrance/ Export to the fluid communication of the fluid storage device.

Further areas of applicability will become obvious by explanation provided herein.Explanation and spy in the summary Determine example and be only used for the purpose illustrated, it is not intended that limits the scope of the present disclosure.

Detailed description of the invention

Attached drawing described herein is only used for the embodiment selected rather than the illustration purpose of all possible embodiment, and It is not intended to limit the scope of the present disclosure.

Fig. 1 is a kind of exemplary vehicle with the power transmission component constructed according to this religious doctrine；

Fig. 2 is the schematic diagram of the power transmission component of Fig. 1 of the first structure；

Fig. 3 is the schematic diagram of the power transmission component of Fig. 1 of second of structure；

Fig. 4 is the schematic diagram of the power transmission component of Fig. 1 of the third structure；

Fig. 5 is the schematic diagram of the power transmission component of Fig. 1 of the 4th kind of structure；

Fig. 6 is the schematic diagram of the power transmission component of Fig. 1 of the 5th kind of structure；And

Fig. 7 is the schematic diagram of the power transmission component of Fig. 1 of the 6th kind of structure.

In multiple views of the attached drawing, corresponding appended drawing reference indicates corresponding component.

Specific embodiment

Exemplary embodiment is more fully described now with reference to attached drawing.

Referring to Fig. 1 in attached drawing, have that the power transmission component that can construct according to the religious doctrine of the disclosure activates from The exemplary vehicle of clutch is usually indicated by appended drawing reference 10.Vehicle 10 can have dynamical system 14 and transmission system or power train 18.Can routinely tectonic kinetics system 14, and the dynamical system 14 may include power source 22 and speed changer 26.Power source 22 can quilt It is configured to provide for thrust power (propulsive power), also, power source 22 may include such as internal combustion engine and/or electronic Machine.Speed changer 26 can receive the thrust power from power source 22, and can output power to power train 18.Speed changer 26 can With multiple transmission ratios for automatically selecting or manually selecting.In the particular provided example, power train 18 is a11wheel drive Structure, it will be understood by those skilled in the art that, the religious doctrine of the disclosure is applicable to other powertrain arrangements (including example Such as four-wheel drive structure, driving structure of rear wheel and front-wheel drive structure).

Power train 18 may include preceding axle assemble 30, power take-off unit (power take-off unit) (PTU) 34, pass Moving axis 38 and rear axle assemble 42.The output of speed changer 26 can couple with the input of preceding axle assemble 30, to drive preceding axle assemble 30 Input link 46.Power take-off unit 34 can have PTU input link 50 and PTU output link 54, and PTU input link 50 can connect The rotary power of the input link 46 from preceding axle assemble 30 is received, rotary power can be transmitted to transmission by PTU output link 54 Axis 38.PTU output link 54 can be attached to rear axle assemble 42 by transmission shaft 38, so that rear by the rotary power that PTU34 is exported Axle assemble 42 receives.Can the preceding axle assemble 30 of full-time driving and rear axle assemble 42, to respectively drive front vehicle wheel 58 and rear wheel 62. It will be understood, however, that power train 18 may include one or more clutches, to interrupt the rotation of a part by power train 18 The transmission of rotatory force.In the particular provided example, power train 18 includes first clutch 66 and power transmission component 70, the One clutch 66 can be configured to interrupt the transmission of entrance or the rotary power by PTU34, and power transmission component 70 can quilt It is configured to the rotation of the component after controlling in axle assemble 42.

Preceding axle assemble 30, PTU34 and first clutch 66 may be mounted to that in casing assembly 74.Preceding axle assemble 30 may include Input link 46, double-speed speed change gear 78, front differential mechanism component 82 and pairs of half front axle 86.Input link 46 can be hollow shaft, The hollow shaft can be configured to engage with the output link of speed changer 26.Input link 46 can be configured to and double-speed speed change gear 78 Engagement.Double-speed speed change gear 78 can be configured to engage with first clutch 66 and front differential mechanism component 82.

Front differential mechanism component 82 can couple with half front axle 86, and allow the speed difference between half front axle 86.It is being mentioned In the example of confession, front differential mechanism component 82 is open differential.It will be appreciated that however, such as one or more clutches, lock Only other differential gears of formula differential mechanism or anti-slip differential can use in alternate embodiments.

PTU34 may include PTU input link 50, pinion gear 90 and PTU output link 54.PTU input link 50 may include The annular bevel gear (bevel ring gear) being mounted in the casing assembly.Pinion gear 90 can be with PTU input link 50 Annular bevel gear engagement, and can be aligned along the axis for the rotation axis for being approximately perpendicular to input link 46.If desired, small Gear 90 can be hypoid gear (hypoid pinion gear).PTU output link 54 can couple with pinion gear 90, with It is rotated.

First or regime clutch (mode clutch) 66 can be any type of clutch, it may for example comprise it is frictional Clutch or synchronizer.In the particular provided example, regime clutch 66 be with clutch input link 94 and from The jaw clutch (dog clutch) of clutch output link 98.Clutch input link 94 can couple with double-speed speed change gear 78, To be rotated with the double-speed speed change gear 78.Clutch output link 98 non-rotatably can bore tooth with the annular of PTU input link 50 Wheel connection.Regime clutch 66 can be it is operable, between clutch input link 94 and clutch output link 98 Selectively transmit rotary power.

Axle assemble 42 may include inputting pinion gear 102, annular bevel gear 106, the second differential assembly 110, pairs of afterwards Second axis 114 and power transmission component 70.Input pinion gear 102 can couple with the end of transmission shaft 38, to revolve with transmission shaft 38 Turn.Second annular bevel gear 106 can engage with input pinion gear 102.Second differential assembly 110, which can be configured to receive, to be passed through The rotary power that second annular bevel gear 106 is transmitted, and the rotary power is transmitted to the second axis 114.Second differential mechanism group Part 110 can have the device for allowing the speed difference between the second axis 114.In the example of offer, differential gear includes Open type differential.

Power transmission component 70 may include second clutch 118, motor 122 and hydraulic system 126.Power transmission component 70 Second clutch or axis cut-off clutch 118 can be configured to selectively interrupt through the second differential assembly 110 Power transmission.Axis cut-off clutch 118 can be any type of clutch, and can be with the second differential assembly 110 coaxially Installation.In the particular provided example, axis cut-off clutch 118 includes clutch input link 130, multiple first clutches Piece 134, clutch output link 138, multiple second clutch pieces 142 and actuator 146.Clutch input link 130 can be with Annular bevel gear 106 couples, to rotate with the annular bevel gear 106.Multiple first clutch pieces 134 can be defeated with clutch Enter component 130 non-rotatably to couple.Clutch output link 138 can couple with the second differential assembly 110, will rotate dynamic Power is supplied to the second differential assembly 110.Multiple second clutch pieces 142 can be with clutch output link 138 non-rotatably Connection.First clutch piece 134 and second clutch piece 142 can be staggeredly friction plate (interleaved friction Plate), and actuator 146 can be used compress first clutch piece 134 and second clutch piece 142 so that first from Clutch piece 134 and the engagement rubbing against one another of second clutch piece 142, so as to by axis cut-off clutch 118 by rotary power from Annular bevel gear 106 is transmitted to the second differential assembly 110.When actuator 146 is disengaged such that rotary power does not pass through axis When cut-off clutch 118 transmits, rear-wheel 62 will drive the second axis 114, but axis cut-off clutch 118 prevents rotary power from transmitting To annular bevel gear 106.In this way, the operation of vehicle 10 would not allow for rear-wheel 62 " anti-in front wheel drive mode To driving (back drive) " annular bevel gear 106.It in the examples provided, can although motor 122 is motor Using the motor of any appropriate type.Motor 122 can be drivingly coupled and hydraulic by output shaft 150 and hydraulic system 126 System 126 can be coupled to be in fluid communication with actuator 146.

Referring additionally to Fig. 2 in attached drawing, the dynamic of the hydraulic system 126 (Fig. 1) with first structure is illustrated in more detail Power transmission part 70, and the hydraulic system 126 of first structure is indicated by appended drawing reference 126a.Output shaft 150 can be for along first Direction 210 is rotatable.Motor 122 can be defeated to rotate along the second direction 214 opposite with first direction 210 to be reversible Shaft 150.It can be by any suitable means (for example, conversion is supplied to the polarity of the power supply of motor 122 or passes through gearbox The mode of (not shown)) reverse motor 122 direction of rotation.

Actuator 146 may include piston 218, shell 222 and force application board (apply plate) 226.Actuator 146 may be used also Including reset spring (not shown).222 limited cavity 230 of shell.Piston 218 can be slidably received in cavity 230.It is living Plug 218 and piston chamber can have annular.Shell 222 and piston 218 can limit piston chamber 232.Piston 218 can be with force application board 226 Connection, to translate force application board 226 between the first position and the second position.In the first position, force application board 226 can be towards One clutch disc 134 and second clutch piece 142 extend, so that first clutch piece 134 and second clutch piece 142 are each other It is frictionally engaged, so that rotary power is transmitted to clutch output link 138 from clutch input link 130.Described second Position, force application board 226 can retract from first clutch piece 134 and second clutch piece 142 or towards 134 Hes of first clutch piece Second clutch piece 142 extends less amount.In the second position, first clutch piece 134 and second clutch piece 142 can It is disengaged from each other, so that rotary power does not transmit between clutch input link 130 and clutch output link 138.It answers When understanding, actuator 146 can be configured to the behaviour of any number of middle position between the first position and the second position Make, so that can be controlled or be adjusted by a certain amount of torque that second clutch 118 transmits.Reset spring (not shown) can It is configured as towards first position or second position bias force application board 226.

Hydraulic system 126a may include liquid storage device 238, actuator 146, the first valve 240, pump 242 and fluid storage device 244.Hydraulic system 126a may also include the second valve 246 and third valve 248.Liquid storage device 238 can be configured to accommodate certain volume Hydraulic fluid.Liquid storage device 238 can be coupled by leak-off pipe (bleed conduit) 250 with piston chamber 232 fluid.Leak-off pipe 250 can be configured to that a small amount of fluid is allowed to flow to liquid storage device 238 from piston chamber 232.Leak-off pipe 250 can be minor diameter pipe Road either may include being configured to limitation to pass through the restriction element or device of the flow velocity of leak-off pipe 250.The restriction element or dress Setting can be configured to only allow when the pressure in piston chamber 232 is beyond predetermined pressure, and fluid is expelled to liquid storage from piston chamber 232 Device 238.

First valve 240 can have multiple inlet/outlets, including first port 254, second port 256, third port 258 With the 4th port 260.4th port 260 can be coupled to be in fluid communication by first pipe 264 and piston chamber 232.Although showing It shows to meaning property, the first valve 240 can have valve body (not specifically illustrated) and valve components (not specifically illustrated), and valve components can make First valve 240 is in the first position of first mode (not specifically illustrated) and the first valve 240 is made to be in second mode (not specifically Show) the second position between it is removable relative to valve body.Moveable element can pass through any appropriate component (such as helical Pipe 266) it is moved between the first position and the second position (that is, the first valve 240 can be cut between the first mode and the second mode It changes).

When the first valve 240 is in first mode, the first valve 240 is allowed between first port 254 and second port 256 Fluid communication.In the first mode, the first valve 240 can prevent the fluid between third port 258 and the 4th port 260 from connecting It is logical.Although not specifically illustrated, the first valve 240 be can be configured to, and allow one-way flow when being in the first mode, so that stream Body can flow to second port 256 from first port 254, while fluid being prevented to flow to first port from second port 256 254。

When the first valve 240 is in second mode, the first valve 240 allows first port 254, third port 258 and Fluid communication between four ports 260.Although not specifically illustrated, the first valve 240 can be configured to permit when in the second mode Perhaps from 258 one-way flow of third port, so that fluid can flow to the 4th port 260 from third port 258, while fluid is prevented Third port 258 is flowed to from first port 254 and the 4th port 260.

Pump 242 is driveably coupled to output shaft 150, so that motor 122 can pass through 150 pump operation 242 of rotating output shaft. Pump 242 can be the pump of any type, such as Gerotor pump (gerotor pump).Pump 242 can be configured to forward mode Or reverse mode operation, so that pump 242 can be cut between forward mode and reverse mode according to the direction of rotation of output shaft 150 It changes.Pump 242 can have multiple inlet/outlets, such as fifth port 270 and the 6th port 272.Fifth port 270 can pass through Two pipelines 274 couple with 238 fluid of liquid storage device.6th port 272 can be joined by third pipeline 276 and 254 fluid of first port It connects.

Fluid storage device 244 can be configured as receiving one for the container of restriction second chamber 280, the second chamber 280 Determine the pressurized hydraulic fluid of volume.In the particular provided example, fluid storage device 244 is accumulator (accumulator), and second chamber 280 is partly limited by displaceable element 284, displaceable element 284 it is removable with Change the volume of second chamber 280.Although other types of accumulator can be used, in the particular provided example, institute Stating fluid storage device is spring bias accumulator, so that displaceable element 284 is spring biased, into second chamber 280 Fluid apply pressure.Fluid storage device 244 can have the 7th port 286 and the 8th being in fluid communication with second chamber 280 Port 288.7th port 286 can be coupled to be in fluid communication by the 4th pipeline 290 with second port 256.8th port 288 It can be coupled to be in fluid communication by the 5th pipeline 292 with third port 258.Although being not specifically illustrated, fluid storage device 244 alternatively have a port, such as with the 7th port 286 but not including that the 8th port 288.In this structure In, the 4th pipeline 290 and the 5th pipeline 292 can be in the point streams between second port 256, third port 258 and the 7th port 286 Body connection.

Second valve 246 can be positioned with 290 coaxial fluid of the 4th pipeline (in-line), so that the second valve 246 is located at second Between port 256 and the 7th port 286.Second valve 246, which can be, allows fluid to flow to the 7th port 286 from second port 256 Fluid is prevented to flow to the check valve of second port 256, such as check-valves from the 7th port 286 simultaneously.Third valve 248 can be with the 5th It positions to 292 coaxial fluid of pipeline, so that third valve 248 is between third port 258 and the 8th port 288.Third valve 248 But fluid is allowed to flow to third port 258 from the 8th port 288 while fluid being prevented to flow to the 8th end from third port 258 The check valve of mouth 288, such as check-valves.

Although being not specifically illustrated, the second leak-off pipe can fluid connection liquid storage device 238 and second chamber 280.Second aerial drainage Pipe (not shown) can be configured to that a small amount of fluids is allowed to flow to liquid storage device 238 from second chamber 280.Second leak-off pipe is (not Show) it can be small diameter pipeline, or may include the limitation member for being configured to limitation by the flow velocity of the second leak-off pipe (not shown) Part or device.The restriction element or device can be configured to only allow when the pressure in second chamber 280 is beyond pre- level pressure When power, fluid is expelled to liquid storage device 238 from second chamber 280.Second leak-off pipe (not shown) can be with the second valve 246 and the 7th end The 4th pipeline 290 connection between mouthfuls 286, can perhaps couple with the 5th pipeline 292 or can directly with second chamber 280 It connects.Although can be used so that the other structures that the second leak-off pipe (not shown) can be discharged to liquid storage device 238, the second leak-off pipe (not shown) can couple with leak-off pipe 250 or directly couple with liquid storage device 238.

In operation, when the first valve 240 is in first mode, pump 242 can be operated with forward mode, with from liquid storage device Fluid is pumped in second chamber 280 by the first valve 240 in 238.In this way can be operated to pump 242 predetermined time, Until reaching predetermined pressure in second chamber 280, or until fluid is needed in piston chamber 232.If pump 242 is stopped, Fluid in second chamber 280 can be kept under stress by the first valve 240 and/or the second valve 246.In this way, Relatively large volume of fluid can be stored until needing under stress.If pump 242 stays open or second chamber 280 Interior pressure is more than predetermined pressure, then some fluids can be discharged by the second leak-off pipe (not shown), to keep required pressure Power.

When needing first clutch piece 134 and second clutch piece 142 engages, the first valve 240 can be cut from first mode Change to second mode.A large amount of storage fluids in the second mode, second chamber 280 can be logical from fluid storage device 244 It crosses the first valve 240 to flow into piston chamber 232, quickly to stretch out piston towards first clutch piece 134 and second clutch piece 142 218.Piston 218, pump 242 are quickly moved when individually operated than pump 242 from a large amount of pressurized fluids of second chamber 280 It can be configured to higher pressure and lower operated in flow rate.When the first valve 240 is in second mode, pump 242 can be grasped Piston chamber 232 is pumped to by the first valve 240 from liquid storage device 238 as by fluid, so that first clutch piece 134 and second Clutch disc 142 is fully engaged.First valve 240 and/or third valve 248 can prevent the first valve 240 from pumping 242 when being in second mode Pump fluid into second chamber 280.Leak-off pipe 250 allows some fluids to be emitted into liquid storage device 238 from piston chamber 232 to tie up Hold the required pressure in piston chamber 232.(such as pressure passes the available any appropriate device coupled with piston chamber 232 fluid Sensor 294) determine pressure in piston chamber 232.Leak-off pipe 250 may also allow for the air being mixed in fluid pressure line 126a to leak into Liquid storage device 238.Pump 242 can also operate intermittently or with friction speed, with the pressure in regulating piston room 232, to adjust The torque that section is transmitted by first clutch piece 134 and second clutch piece 142.

When needing first clutch piece 134 and second clutch piece 142 is disengaged, the can be in the first valve 240 With reverse mode operation pump 242 when two modes, fluid is pumped to liquid storage device 238 from piston chamber 232, is lived to retract rapidly Plug 218.

Referring to Fig. 3, the power transmission component 70 of the hydraulic system 126 (Fig. 1) with the second structure, and second are instantiated The hydraulic system of structure is indicated by appended drawing reference 126b.In as follows other than illustrated and description, hydraulic system 126b It can be similar to hydraulic system 126a.The description of the element of similar label is incorporated herein by reference and will no longer weigh It is multiple.Hydraulic system 126b may include liquid storage device 238, actuator 146, the first valve 310, pump 242 and fluid storage device 244.

First valve 310 can have multiple inlet/outlets, including first port 318, second port 322 and third port 326.Third port 326 can be coupled to be in fluid communication by first pipe 330 and piston chamber 232.Although schematically showing, First valve 310 can have valve body (not specifically illustrated) and valve components (not specifically illustrated), which can make the first valve 310 First position in first mode (schematically showing) and the first valve 310 is made to be in second mode (not specifically illustrated) It is removable relative to valve body between the second position.Moveable element can pass through any appropriate component (such as solenoid 334) (that is, the first valve 310 can switch between the first mode and the second mode) is moved between the first position and the second position.

When the first valve 310 is in first mode, the first valve 310 is allowed between first port 318 and second port 322 Fluid communication.In first mode, the first valve 310 can be prevented between third port 326 and first port 318, second port 322 Fluid communication.First valve 310 can be configured to allow one-way flow when in first mode, so that fluid can be from first end Mouth 318 flows to second port 322, while fluid being prevented to flow to first port 318 from second port 322.

When the first valve 310 is in second mode, the first valve 310 allows first port 318, second port 322 and Fluid communication between three ports 326.First valve 310 can be configured to allow when in the second mode from second port 322 One-way flow so that fluid can flow to third port 326 from second port 322, while preventing fluid from 318 He of first port Third port 326 flows to second port 322.

Pump 242 can have the fifth port 270 that can couple by second pipe 274 with 238 fluid of liquid storage device and can pass through The 6th port 272 that third pipeline 276 couples with 318 fluid of first port.Fluid storage device 244 may include the 7th port 286 and do not include the 8th port 288 (Fig. 2) and the 5th pipeline 292 (Fig. 2).7th port 286 can pass through the 4th pipeline 290 Couple with 322 fluid of second port.Although being not specifically illustrated, the second leak-off pipe can refer to Fig. 2 and configure as described above, will Second chamber 280 and the connection of 238 fluid of liquid storage device.For example, the second leak-off pipe (not shown) can couple with the 4th pipeline 290 or Directly couple with second chamber 280.

In operation, hydraulic system 126b can similarly be run with hydraulic system 126a.When the first valve 310 is in the first mould When formula, pump 242 can be operated with forward mode, and fluid is pumped to second chamber by the first valve 310 from liquid storage device 238 In 280.In this way can be operated to pump 242 predetermined time, until reaching predetermined pressure in second chamber 280, or until Fluid is needed in piston chamber 232.If pump 242 is stopped, the fluid in second chamber 280 can be by the first valve 310 in pressure Under be kept.In this way, relatively large volume of fluid can be stored until needing under stress.If pump 242 Stay open or second chamber 280 in pressure be more than predetermined pressure, then some fluids (can not be shown by the second leak-off pipe It is discharged out), to keep required pressure.

When needing first clutch piece 134 and second clutch piece 142 engages, the first valve 310 can be cut from first mode Change to second mode.A large amount of storage fluids in the second mode, second chamber 280 can be logical from fluid storage device 244 It crosses the first valve 310 and flows into piston chamber 232, quickly to stretch out piston towards first clutch piece 134 and second clutch piece 142 218.Piston 218, pump 242 are quickly moved when individually operated than pump 242 from a large amount of pressurized fluids of second chamber 280 It can be configured to higher pressure and lower operated in flow rate.As the first valve 310 is in second mode, pump 242 can be grasped Piston chamber 232 is pumped to so that first clutch piece 134 and second by the first valve 310 from liquid storage device 238 as by fluid Clutch disc 142 is fully engaged.When the first valve 310 is in second mode, the first valve 310 can prevent pump 242 from pumping fluid To second chamber 280.Leak-off pipe 250 allows some fluids to be emitted into liquid storage device 238 from piston chamber 232 to maintain piston chamber Required pressure in 232.The available any appropriate device (for example, pressure sensor 294) coupled with piston chamber 232 fluid Determine the pressure in piston chamber 232.Leak-off pipe 250 may also allow for the air being mixed in fluid pressure line 126b to leak into liquid storage device 238.Pump 242 can also intermittently or with friction speed be operated, with the pressure in regulating piston room 232, to adjust logical Cross the torque that first clutch piece 134 and second clutch piece 142 transmit.

When needing first clutch piece 134 and second clutch piece 142 is disengaged, the can be in the first valve 310 With reverse mode operation pump 242 when two modes, fluid is pumped to liquid storage device 238 from piston chamber 232, is lived to retract rapidly Plug 218.

Referring to Fig. 4, the power transmission component 70 of the hydraulic system 126 (Fig. 1) with third structure, and third are instantiated The hydraulic system of structure is indicated by appended drawing reference 126c.In as follows other than illustrated and description, hydraulic system 126c It can be similar to hydraulic system 126a and hydraulic system 126b.The description of the element of similar label is incorporated herein by reference And it will not be repeated again.Hydraulic system 126c may include liquid storage device 238, actuator 146, the first valve 410, the second valve 412, third Valve 414, pump 242 and fluid storage device 244.

First valve 410 can have multiple inlet/outlets, including first port 418 and second port 422.Although schematically Ground is shown, and the first valve 410 can have valve body (not specifically illustrated) and valve components (not specifically illustrated), which can make One valve 410 is in the first position of first mode (schematically showing) and the first valve 410 is made to be in second mode (not specifically Show) the second position between it is removable relative to valve body.Moveable element can pass through any appropriate component (such as helical Pipe 434) it is moved between the first position and the second position (that is, the first valve 410 can be cut between the first mode and the second mode It changes).

When the first valve 410 is in first mode, the first valve 410 can be prevented between first port 418 and second port 422 Fluid communication.When the first valve 410 is in second mode, the first valve 410 allows first port 418 and second port 422 Between fluid communication.First valve 410 can be configured to allow when in the second mode from 422 one-way flow of second port, So that fluid can flow to first port 418 from second port 422, while fluid being prevented to flow to second from first port 418 Port 422.First port 418 can be coupled by first pipe 450 with piston chamber 232 fluid.

Pump 242 can have the fifth port 270 that can couple by second pipe 274 with 238 fluid of liquid storage device and can pass through The 6th port 272 that third pipeline 454 couples with piston chamber 232 fluid.Fluid storage device 244 may include the 7th port 286 With the 8th port 288.7th port 286 can be coupled by the 4th pipeline 458 with 270 fluid of fifth port.8th port 288 can Coupled by the 5th pipeline 462 with 422 fluid of second port.

Second valve 412 can be positioned with 274 coaxial fluid of second pipe, so that the second valve 412 is located at liquid storage device 238 and Between five ports 270.Second valve 412 but allow fluid flow to fifth port 270 from liquid storage device 238 and meanwhile prevent fluid from Fifth port 270 flows to the check valve of liquid storage device 238, such as check-valves.Third valve 414 can be with 458 coaxial fluid of the 4th pipeline Ground positioning, so that third valve 414 is between fifth port 270 and the 7th port 286.Third valve 414, which can be, allows fluid The 7th port 286 is flowed to from fifth port 270 while fluid being prevented to flow to the check valve of fifth port 270 from the 7th port 286, Such as check-valves.4th pipeline 458 can the position between the second valve 412 and fifth port 270 couple with second pipe 274. Second leak-off pipe 466 can also couple second chamber 280 with 238 fluid of liquid storage device.Second leak-off pipe 466 can be configured to allow A small amount of fluid flows to liquid storage device 238 from second chamber 280.Second leak-off pipe 466 can be small diameter pipeline, or may include matching It is set to limitation and passes through the restriction element or device of the flow velocity of the second leak-off pipe 466.The restriction element or device can be configured Only to allow when the pressure in second chamber 280 is beyond predetermined pressure, fluid is expelled to liquid storage device 238 from second chamber 280. Although other structures can be used, in the examples provided, the second leak-off pipe 466 is illustrated as and third valve 414 and the 7th The 4th pipeline 458 connection between port 286.For example, the second leak-off pipe 466 alternatively couples with the 5th pipeline 462, or Directly couple with second chamber 280.Although the other knots for enabling the second leak-off pipe 466 to discharge to liquid storage device 238 can be used Structure, but in the examples provided, the second leak-off pipe 466 couples with leak-off pipe 250.

In operation, when the first valve 410 is in first mode, pump 242 can by with reverse mode operation, by fluid from Piston chamber 232 is pumped in second chamber 280 by third valve 414.Second valve 412 can prevent pump 242 from pumping fluid into storage Liquid device 238.In this way can be operated to pump 242 predetermined time, until reaching predetermined pressure in second chamber 280, until living Fluid is needed in plug room 232, or until insufficient fluid is retained in piston chamber 232.If pump 242 is stopped, second Fluid in chamber 280 can be kept under stress by the first valve 410 and third valve 414.In this way, relatively substantially Long-pending fluid can be stored under stress until needing.If pressure in second chamber 280 is more than predetermined pressure, one A little fluids can be discharged by the second leak-off pipe 466, to keep required pressure.

When needing first clutch piece 134 and second clutch piece 142 engages, the first valve 410 can be cut from first mode Change to second mode.A large amount of storage fluids in the second mode, second chamber 280 can be logical from fluid storage device 244 It crosses the first valve 410 and flows into piston chamber 232, quickly to stretch out piston towards first clutch piece 134 and second clutch piece 142 218.Piston 218, pump 242 are quickly moved when individually operated than pump 242 from a large amount of pressurized fluids of second chamber 280 It can be configured to higher pressure and lower operated in flow rate.As the first valve 410 is in first mode or second mode, pump 242 can be operated with forward mode, and fluid is pumped to piston chamber 232 by third pipeline 454 from liquid storage device 238, thus So that first clutch piece 134 and second clutch piece 142 are fully engaged.First valve 410 is in second mode in the first valve 410 When can prevent pump from 242 pumping fluid into second chamber 280, or may switch back to first mode, to prevent 418 He of first port Fluid communication between second port 422.Leak-off pipe 250 allows some fluids to be emitted into liquid storage device 238 from piston chamber 232, To maintain the required pressure in piston chamber 232.The available any appropriate device coupled with piston chamber 232 fluid (such as is pressed Force snesor 294) determine pressure in piston chamber 232.Leak-off pipe 250 may also allow for the air being mixed in fluid pressure line 126c Leak into liquid storage device 238.Pump 242 can also operate intermittently or with friction speed, with the pressure in regulating piston room 232, from And adjust the torque transmitted by first clutch piece 134 and second clutch piece 142.

When needing first clutch piece 134 and second clutch piece 142 is disengaged, the can be in the first valve 240 With reverse mode operation pump 242 when one mode, fluid is pumped to second chamber 280 from piston chamber 232, to retract rapidly Piston 218.

Referring to Fig. 5, the power transmission component 70 of the hydraulic system 126 (Fig. 1) with the 4th structure, and the 4th are instantiated The hydraulic system of structure is indicated by appended drawing reference 126d.In as follows other than illustrated and description, hydraulic system 126d It can be similar to hydraulic system 126c.The description of the element of similar label is incorporated herein by reference and will no longer weigh It is multiple.Hydraulic system 126d may include liquid storage device 238, actuator 146, the first valve 510, pump 242 and fluid storage device 244.

First valve 510 can have multiple inlet/outlets, including first port 518, second port 522, third port 526 With the 4th port 530.Although schematically showing, the first valve 510 can have valve body (not specifically illustrated) and valve components (not specific Show), which can make the first valve 510 be in the first position of first mode (schematically showing) and make first Valve 510 is between the second position of second mode (not specifically illustrated) removable relative to valve body.Moveable element can lead to Any appropriate component (such as solenoid 534) is crossed to be moved between the first position and the second position (that is, the first valve 510 can be Switch between first mode and second mode).First port 518 can be coupled by the 5th of first pipe 550 and pump 242 Port 270 is in fluid communication.Second port 522 can be coupled to be in fluid communication by second pipe 554 and liquid storage device 238.Third Port 526 can be coupled to be in fluid communication by the 7th port 286 of third pipeline 558 and fluid storage device 244.4th end Mouth 530 can be coupled to be in fluid communication by the 4th pipeline 562 with piston chamber 232.

When the first valve 510 is in first mode, the first valve 510 is allowed between first port 518 and third port 526 Fluid communication.In first mode, the first valve 510 can prevent second port 522 and first port 518, third port 526 and Fluid communication between 4th port 530.In first mode, the first valve can prevent the 4th port 530 and first port 518, the Fluid communication between Two-port netwerk 522 and third port 526.First valve 510 can be configured to permission when in first mode One-way flow so that fluid can flow to third port 526 from first port 518, while preventing fluid from flowing from third port 526 To first port 518.

When the first valve 510 is in second mode, the first valve 510 is allowed between first port 518 and second port 522 Fluid communication.In second mode, the first valve 510 allows the fluid communication between third port 526 and the 4th port 530. In second mode, the first valve 510 can prevent the fluid communication between first port 518 and third port 526, the 4th port 530. In second mode, the first valve 510 can prevent the fluid communication between second port 522 and third port 526, the 4th port 530. First valve 510 can be configured to allow when in the second mode from 526 one-way flow of third port, so that fluid can be from third Port 526 flows to the 4th port 530, while fluid being prevented to flow to third port 526 from the 4th port 530.

6th port 272 of pump 242 can be coupled by the 5th pipeline 566 with piston chamber 232 fluid.It is specific shown in show In example, fluid storage device 244 may include the 7th port 286 and not include the 8th port 288 (Fig. 2).Second leak-off pipe 466 It can refer to Fig. 2 to configure as described above, second chamber 280 and 238 fluid of liquid storage device coupled.For example, the second leak-off pipe 466 can Couple with third pipeline 558 or directly couples with second chamber 280.

The operation of hydraulic system 126d can be similar to the operation of above-mentioned hydraulic system 126c.When the first valve 510 is in first When mode, pump 242 can be reversed mode operation, and fluid is pumped to second chamber by the first valve 510 from piston chamber 232 In 280.First valve 510 can prevent pump 242 from pumping fluid into liquid storage device 238.Pump 242 can be operated in this way predetermined Time, until reaching predetermined pressure in second chamber 280, until needing fluid in piston chamber 232, or until insufficient fluid It is retained in piston chamber 232.If pump 242 is stopped, the fluid in second chamber 280 can pass through the in first mode One valve 510 is kept under stress.In this way, relatively large volume of fluid can be stored under stress until needs are Only.If the pressure in second chamber 280 is more than predetermined pressure, some fluids can be discharged by the second leak-off pipe 466, with Pressure needed for keeping.

When needing first clutch piece 134 and second clutch piece 142 engages, the first valve 510 can be cut from first mode Change to second mode.A large amount of storage fluids in the second mode, second chamber 280 can be logical from fluid storage device 244 It crosses the first valve 510 and flows into piston chamber 232, quickly to stretch out piston towards first clutch piece 134 and second clutch piece 142 218.Piston 218, pump 242 are quickly moved when individually operated than pump 242 from a large amount of pressurized fluids of second chamber 280 It can be configured to higher pressure and lower operated in flow rate.As the first valve 510 is in second mode, pump 242 can by with Fluid is pumped to piston chamber 232 by the first valve 510 from liquid storage device 238, so that the first clutch by forward mode operation Device piece 134 and second clutch piece 142 are fully engaged.When the first valve 510 is in second mode, the first valve 510 can prevent from pumping 242 pump fluid into second chamber 280.Leak-off pipe 250 allows some fluids to be emitted into liquid storage device 238 from piston chamber 232, To maintain the required pressure in piston chamber 232.The available any appropriate device coupled with piston chamber 232 fluid is (for example, pressure Force snesor 294) determine pressure in piston chamber 232.Leak-off pipe 250 may also allow for the air being mixed in fluid pressure line 126d Leak into liquid storage device 238.Pump 242 can also intermittently or with friction speed be operated, with the pressure in regulating piston room 232, To adjust the torque transmitted by first clutch piece 134 and second clutch piece 142.

When needing first clutch piece 134 and second clutch piece 142 is disengaged, the first valve 510 can be switched back to First mode, and fluid can be pumped to second chamber 280 from piston chamber 232 by with reverse mode operation by pump 242, from And piston 218 is retracted rapidly.It should be understood that can also be pumped when the first valve 510 is in second mode with reverse mode operation 242, fluid is pumped to liquid storage device 238 from 280 the two of piston chamber 232 and second chamber.

Referring to Fig. 6, the power transmission component 70 of the hydraulic system 126 (Fig. 1) with the 5th structure, and the 5th are instantiated The hydraulic system of structure is indicated by appended drawing reference 126e.In as follows other than illustrated and description, hydraulic system 126e It can be similar to hydraulic system 126a, hydraulic system 126b, hydraulic system 126c and hydraulic system 126d.The element of similar label Description is incorporated herein and will not be repeated again by reference.Hydraulic system 126e may include liquid storage device 238, actuator 146, the first valve 610, the second valve 612, pump 242 and fluid storage device 244.

First valve 610 can have multiple inlet/outlets, including first port 618 and second port 622.Although schematically Ground is shown, and the first valve 610 can have valve body (not specifically illustrated) and valve components (not specifically illustrated), which can make One valve 610 is in the first position of first mode (schematically showing) and the first valve 610 is made to be in second mode (not specifically Show) the second position between it is removable relative to valve body.Moveable element can pass through any appropriate component (such as helical Pipe 634) it is moved between the first position and the second position (that is, the first valve 610 can be cut between the first mode and the second mode It changes).

When the first valve 610 is in first mode, the first valve 610 can be prevented between first port 618 and second port 622 Fluid communication.When the first valve 610 is in second mode, the first valve 610 allows first port 618 and second port 622 Between fluid communication.First valve 610 can be configured to allow when in the second mode from 622 one-way flow of second port, So that fluid can flow to first port 618 from second port 622, while fluid being prevented to flow to second from first port 618 Port 622.First port 618 can be coupled by first pipe 650 with piston chamber 232 fluid.

Pump 242 can have the fifth port 270 that can couple by second pipe 274 with 238 fluid of liquid storage device and can pass through The 6th port 272 that third pipeline 654 couples with piston chamber 232 fluid.Fluid storage device 244 may include the 7th port 286 With the 8th port 288.7th port 286 can be coupled by the 4th pipeline 658 with 272 fluid of the 6th port.Although it can be used Its structure, but in the examples provided, position of the 4th pipeline 658 between the 6th port 272 and piston chamber 232 and the The connection of three pipelines 654.For example, the 4th pipeline 658 alternatively couples with first pipe 650, or couples with piston chamber 232, To receive the fluid from pump 242.8th port 288 can be coupled by the 5th pipeline 662 with 622 fluid of second port.

Second valve 612 can be positioned with 658 coaxial fluid of the 4th pipeline, so that the second valve 612 is along positioned at the 6th port 272 And the 7th the 4th pipeline 658 positioning between port 286.Second valve 612 but allow fluid to flow to the from the 6th port 272 Seven ports 286 prevent fluid from flowing to the check valve of the 6th port 272, such as check-valves from the 7th port 286 simultaneously.Second valve 612 can have scheduled opening pressure (crack pressure), so that when the pressure in third pipeline 654 is predetermined lower than described Opening pressure when, the second valve 612 can prevent fluid from flowing to fluid storage device 244 by the 4th pipeline 658.

Although being not specifically illustrated, the second leak-off pipe can couple liquid storage device 238 with 280 fluid of second chamber.Second lets out Flow tube (not shown) can be configured to that a small amount of fluid is allowed to flow to liquid storage device 238 from second chamber 280.Second leak-off pipe is (not Show) it can be small diameter pipeline, or may include the limitation member for being configured to limitation by the flow velocity of the second leak-off pipe (not shown) Part or device.The restriction element or device can be configured to only allow when the pressure in second chamber 280 is beyond pre- level pressure When power, fluid is expelled to liquid storage device 238 from second chamber 280.Second leak-off pipe (not shown) can be with the second valve 612 and the 7th end The 4th pipeline 658 connection between mouth 286, alternatively, can couple with the 5th pipeline 662, or can directly join with second chamber 280 It connects.Although the other structures for enabling the second leak-off pipe (not shown) to discharge to liquid storage device 238 can be used, second lets out Flow tube (not shown) can couple with leak-off pipe 250 or directly couple with liquid storage device 238.

In operation, when the first valve 610 is in first mode, pump 242 can be operated with forward mode, by fluid from It is pumped in piston chamber 232 in liquid storage device 238 by third pipeline 654.Pump 242 can be operated in this way, until Reach predetermined pressure in piston chamber 232.Once being more than predetermined pressure, such as when first clutch piece 134 and second clutch piece 142 be fully engaged and pump 242 continue provide fluid when, then the second valve 612 is openable, with allow fluid flow into second chamber In 280.If pump 242 is stopped, the fluid in second chamber 280 can be by the first valve 610 and the second valve 612 under stress It is kept.In this way, relatively large volume of fluid can be stored under stress until needing.If pump 242 is kept Pressure in opening or second chamber 280 is more than the predetermined pressure of second chamber 280, then some fluids can be let out by second Flow tube (not shown) discharge, to keep required pressure.Fluid can be also discharged from piston chamber 232 by leak-off pipe 250, to protect Hold pressure needed for piston chamber 232.The available any appropriate device coupled with piston chamber 232 fluid is (for example, pressure passes Sensor 294) determine pressure in piston chamber 232.Leak-off pipe 250 may also allow for the air being mixed in fluid pressure line 126e to leak into Liquid storage device 238.Pump 242 can also intermittently or with friction speed be operated, with the pressure in regulating piston room 232, thus Adjust the torque transmitted by first clutch piece 134 and second clutch piece 142.

When needing first clutch piece 134 and second clutch piece 142 is disengaged, the can be in the first valve 610 With reverse mode operation pump 242 when one mode, fluid is pumped to liquid storage device 238 from piston chamber 232, is lived to retract rapidly Plug 218.

When needing first clutch piece 134 and second clutch piece 142 engages, the first valve 610 can be cut from first mode Change to second mode.A large amount of storage fluids in the second mode, second chamber 280 can be logical from fluid storage device 244 It crosses the first valve 610 and flows into piston chamber 232, quickly to stretch out piston towards first clutch piece 134 and second clutch piece 142 218.Piston 218, pump 242 are quickly moved when individually operated than pump 242 from a large amount of pressurized fluids of second chamber 280 It can be configured to higher pressure and lower operated in flow rate.As the first valve 610 is in second mode, pump 242 can be grasped Piston chamber 232 is pumped to by third pipeline 654 from liquid storage device 238 as by fluid, so that first clutch piece 134 and the Two clutch disc 142 are fully engaged.First valve 610 can prevent from pumping 242 when the first valve 610 is in first mode or second mode Pump fluid into second chamber 280.Second valve 612 can prevent pump 242 from pumping fluid until piston chamber to second chamber 280 It is more than predetermined pressure in 232, to open the second valve 612.Leak-off pipe 250 allows some fluids to be emitted into from piston chamber 232 Liquid storage device 238, to keep the required pressure in piston chamber 232.

Referring to Fig. 7, the power transmission component 70 of the hydraulic system 126 (Fig. 1) with the 6th structure, and the 6th are instantiated The hydraulic system of structure is indicated by appended drawing reference 126f.In as follows other than illustrated and description, hydraulic system 126f It can be similar to hydraulic system 126e.The description of the element of similar label is incorporated herein by reference and will no longer weigh It is multiple.Hydraulic system 126f may include liquid storage device 238, actuator 146, the first valve 710, pump 242 and fluid storage device 244.

First valve 710 can have multiple inlet/outlets, including first port 718 and second port 722.First port 718 It can be coupled to be in fluid communication by first pipe 730 and third pipeline 654, to be in fluid communication with piston chamber 232.First end Mouth 718 directly couples with piston chamber 232 alternatively by first pipe 730.Although schematically showing, the first valve 710 can With valve body (not specifically illustrated) and valve components (not specifically illustrated), which can make the first valve 710 be in the first mould The first position of formula (schematically showing) and make the first valve 710 be in second mode (not specifically illustrated) the second position it Between it is removable relative to valve body.Moveable element can be by any appropriate component (such as solenoid 734) in first position (that is, the first valve 710 can switch between the first mode and the second mode) is moved between the second position.

In hydraulic system 126f, fluid storage device 244 may include the 7th port 286 and not include the 8th port 288 (Fig. 2) and the 5th pipeline 292 (Fig. 2).7th port 286 can be coupled by the 4th pipeline 750 with 722 fluid of second port. Although not specifically illustrated, the second leak-off pipe can refer to Fig. 2 and be configured as described above, by second chamber 280 and liquid storage device 238 Fluid connection.For example, the second leak-off pipe (not shown) can couple with the 4th pipeline 290, or directly with second chamber 280 It connects.Pump 242 can have the fifth port 270 that can couple by second pipe 274 with 238 fluid of liquid storage device and can be by third pipe The 6th port 272 that road 654 couples with 718 fluid of first port.

When the first valve 710 is in first mode, the first valve 710 is allowed between first port 718 and second port 722 Fluid communication.In the example illustrated by, the first valve 710 can be configured to only allow fluid unidirectional when in first mode Second port 722 is flowed through, so that the first valve 710 allows fluid to flow to fluid storage device 244 from first port 718, simultaneously Fluid is prevented to flow to first port 718 from fluid storage device 244.In first mode, the first valve 710 is also configured to when the When pressure (for example, pressure of piston chamber 232) at Single port 718 is lower than predetermined pressure, so that the first valve 710 hinders fluid flow To fluid storage device 244.

When the first valve 710 is in second mode, the first valve 710 is allowed between first port 718 and second port 722 Fluid communication.When in the second mode, the first valve 710 can be configured to allow from 722 one-way flow of second port, so that Fluid can flow to first port 718 from fluid storage device 244, while fluid being prevented to flow to fluid from first port 718 Storage device 244.

In operation, the operation of hydraulic system 126f can be similar to the operation of hydraulic system 126e.When the first valve 710 is in When first mode, pump 242 can be operated with forward mode, and fluid is pumped to from liquid storage device 238 by third pipeline 654 In piston chamber 232.Pump 242 can be operated in this way, until reaching predetermined pressure in piston chamber 232.For example, when the When one clutch disc 134 and second clutch piece 142 are fully engaged and pump 242 and persistently provide fluid, it can reach described predetermined Pressure.Once the pressure (or pressure in first pipe 730 or third pipeline 654) in piston chamber 232 is greater than described predetermined Pressure, then the first valve 710 allows fluid to flow into second chamber 280 by second port 722.If pump 242 is stopped, the Fluid in two chambers 280 can be kept under stress by the first valve 710.In this way, relatively large volume of fluid It can store under stress until needing.If pump 242 stay open or second chamber 280 in pressure be more than the second chamber The predetermined pressure of room 280, then some fluids can be discharged by the second leak-off pipe (not shown), to keep required pressure.Also Fluid can be discharged from piston chamber 232 to maintain the required pressure in piston chamber 232 by leak-off pipe 250.It is available with work Any appropriate device (such as pressure sensor 294) of plug 232 fluid of room connection determines the pressure in piston chamber 232.Aerial drainage Pipe 250 may also allow for the air being mixed in fluid pressure line 126f to leak into liquid storage device 238.Pump 242 can also intermittently or with Friction speed operation passes through first clutch piece 134 and second clutch to adjust with the pressure in regulating piston room 232 The torque that piece 142 transmits.

When needing first clutch piece 134 and second clutch piece 142 is disengaged, the can be in the first valve 710 With reverse mode operation pump 242 when one mode, fluid is pumped to liquid storage device 238 from piston chamber 232, is lived to retract rapidly Plug 218.

When needing first clutch piece 134 and second clutch piece 142 engages, the first valve 710 can be cut from first mode Change to second mode.A large amount of storage fluids in the second mode, second chamber 280 can be logical from fluid storage device 244 It crosses the first valve 710 and flows into piston chamber 232, quickly to stretch out piston towards first clutch piece 134 and second clutch piece 142 218.Piston 218, pump 242 are quickly moved when individually operated than pump 242 from a large amount of pressurized fluids of second chamber 280 It can be configured to higher pressure and lower operated in flow rate.As the first valve 710 is in second mode, pump 242 can be grasped Piston chamber 232 is pumped to by third pipeline 654 from liquid storage device 238 as by fluid, so that first clutch piece 134 and the Two clutch disc 142 are fully engaged.When the first valve 710 is in second mode, the first valve 710 can prevent pump 242 by fluid pump It send to second chamber 280.Leak-off pipe 250 allows some fluids to be emitted into liquid storage device 238 from piston chamber 232, to remain living Fill in pressure required in room 232.First valve 710 may switch back to first mode, and the first valve 710 can prevent pump 242 by fluid Second chamber 280 is pumped to until being more than predetermined pressure in piston chamber 232, the first valve 710 is beaten towards second port 722 It opens.

The explanation of above-described embodiment is provided for purposes of illustration and description.It is not intended to exhaustion or limits this public affairs It opens.The individual component or feature of specific embodiment are generally not limited to the specific embodiment, but, even if not having in where applicable Have and specifically display or describe, the individual component or feature of specific embodiment are also interchangeable, and can be in selected implementation It is used in example.The individual component or feature can be changed with various ways.This change is not to be regarded as a departure from the disclosure, and And all this deformations are intended to be included in the scope of the present disclosure.

Each example embodiment is provided so that the disclosure will be thorough and range is fully conveyed to this field skill Art personnel.It is proposed many specific details, such as example of particular elements, device and method, to provide each implementation to the disclosure The thorough understanding of example.It will be apparent that, do not need to those skilled in the art using specific detail, each example embodiment can To realize with many different forms, and it is not construed as limiting the scope of the present disclosure.In some example embodiments, Well-known technique, well-known apparatus structure and widely-known technique are not described in.

Term used herein only for describe specific example embodiments purpose, it is not intended that limitation.Such as herein Used in, " one " of singular, "one" and " described " can be intended to further include plural form, unless context is in addition clear Chu points out.Term "include", "comprise", " containing " and " having " are inclusive, thus be described in detail the feature, entirety, The presence of step, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, entirety, Step, operation, component, assembly unit and/or their combination.Method steps described herein, technique and operation should not be construed as must The particular order for requiring them so to discuss or illustrate executes, except being non-specifically determined as executing sequence.It will also be understood that can be used Other step or alternative steps.

When element or layer be mentioned as it is another in another element or layer "upper", " being joined to " another element or layer, " being connected to " When one element or layer or " being connected to " another element or layer, it can on another element or layer, be directly connectcted to Another element or layer are directly connected to another element or layer or are directly coupled to another element or layer, or cental element may be present Part or layer.On the contrary, when element be mentioned as " direct " another element or layer "upper", " being directly connectcted to " another element or layer, When " being directly connected to " another element or layer or " being directly coupled to " another element or layer, then intermediary element or centre is not present Layer.Other words for describing the relationship between each element should also explain in the same way (for example, " ... between " with " between directly existing ... ", " adjacent " and " direct neighbor " etc.).As it is used in the present context, term "and/or" include one or Any and all combinations in multiple associated listed items.

Although term first, second, third, etc. herein can be used for describing various component, assembly units, region, layer and/or Section, but these component, assembly units, region, layer and/or section should not be limited by these terms.These terms can be used only In a component, assembly unit, region, layer or section are distinguished with another region, layer or section.Such as " first ", " second " and The term of other numerical terms not order of representation or order as used herein, unless otherwise clear from the context.Therefore, First element, component, region, layer or section discussed below are referred to alternatively as second element, component, region, layer or section, without It is detached from the teaching of example embodiment.

For convenience of description, "inner", "outside", " under ", the space phase of " lower section ", " lower part ", " top ", " top " etc. It can be used for describing the relationship of an elements or features and other elements or features as illustrated herein to term. Space relative terms can be intended to the different direction other than orientation discribed in figure comprising device in use or operation. For example, being described as then can position in the element of other elements or features " below " or " under " if device is reversed in figure In other elements or features " top ".Therefore, example term " lower section " may include above and below two orientation.Device can be with Other way orientation (be rotated by 90 ° or at other orientations), relative descriptors language in space used herein can be solved correspondingly It releases.