阅读说明：本技术 一种正时链条系统及其发动机 (A kind of timing chain system and its engine ) 是由 蔡剑平 秦灵林 于 2019-08-29 设计创作，主要内容包括：本发明涉及一种正时链条系统及其发动机,包括进气链轮、排气链轮、正时链轮、正时链条导轨、液压涨紧器和围绕在进气链轮、排气链轮与正时链轮上的正时链条,还包括设在正时链条导轨的两端的导向块、设在导向块上的通道、输入端与液压涨紧器连接的给油室和与给油室的输出端连接的油管。导向块的顶面为弧形面,导向块的顶面上设有凹槽,凹槽的底面为弧形面。凹槽底面与正时链条导轨的连接处圆滑过渡,其最高点与最底面的高度差为0.2-0.3mm。本发明能够使正时链条得到充分的润滑,可以起到降低磨损,延长使用寿命和提高运动精度的作用。(The present invention relates to a kind of timing chain system and its engines, it further include the guide pad for being located at the both ends of timing chain guide rail, the channel being located on guide pad, input terminal and hydraulic tension equipment connection to grease chamber and the oil pipe being connect with the output end to grease chamber including air inlet sprocket wheel, exhaust sprocket, timing sprocket, timing chain guide rail, hydraulic tension equipment and the timing chain being centered around on air inlet sprocket wheel, exhaust sprocket and timing sprocket.The top surface of guide pad is arcwall face, and the top surface of guide pad is equipped with groove, and the bottom surface of groove is arcwall face.The difference in height of the junction rounding off of groove floor and timing chain guide rail, highest point and most bottom surface is 0.2-0.3mm.The present invention can be such that timing chain is adequately lubricated, and can play the role of reducing abrasion, prolong the service life and improve kinematic accuracy.)

1. a kind of timing chain system, including air inlet sprocket wheel (11), exhaust sprocket (12), timing sprocket (13), timing chain are led Rail (14), hydraulic tension equipment (15) and it is centered around air inlet sprocket wheel (11), the timing on exhaust sprocket (12) and timing sprocket (13) Chain (16), which is characterized in that further include:

Guide pad (21) is located at the both ends of each timing chain guide rail (14)；

Channel (22), both ends are connected to the top and bottom of the guide pad (21) respectively；

Grease chamber (23) are given, there is an input terminal and an output end, input terminal to connect with the hydraulic tension equipment (15)；

Oil pipe (24), input terminal are connect with the output end to grease chamber (23), and output end is connect with the channel (22), is used for It will be on the top surface of oil delivery to the guide pad (21).

2. a kind of timing chain system according to claim 1, it is characterised in that: the top surface of the guide pad (21) is arc Shape face.

3. a kind of timing chain system according to claim 2, it is characterised in that: set on the top surface of the guide pad (21) Fluted (3), the bottom surface of the groove (3) are arcwall face.

4. a kind of timing chain system according to claim 3, it is characterised in that: groove (3) bottom surface and timing chain The junction rounding off of guide rail (14) working face；

The difference in height of groove (3) highest point and most bottom surface is 0.2-0.3mm.

5. a kind of timing chain system described in any one of -4 according to claim 1, it is characterised in that: the timing chain The bottom surface of guide rail (14) working face is equipped with rectangular through-hole (41)；

The bottom surface of the guide pad (21) is equipped with the locating piece (42) to match with rectangular through-hole (41)；

The locating piece (42) and the rectangular through-hole (41) are interference fitted.

6. a kind of timing chain system according to claim 1, it is characterised in that: the channel (22) and the oil pipe (24) junction is equipped with metal hose (5).

7. a kind of timing chain system according to claim 1, it is characterised in that: it is described to grease chamber (23) with it is described hydraulic The junction of tension device (15) is equipped with one-way guide flow valve (6).

8. a kind of timing chain system according to claim 7, it is characterised in that: described to be equipped with pressure release to grease chamber (23) Valve (7), the relief valve (7) are connected to the inner cavity to grease chamber (23).

9. a kind of engine, which is characterized in that including a kind of timing chain system as described in any one of claim 1-8 System.

Technical field

The present invention relates to the technical fields of vehicular engine, more particularly, to a kind of timing chain system and its engine.

Background technique

With being constantly progressive for vehicle technical level and industrial development is made, the Timing Belt of partial engine is started chain Item is substituted, and compared with traditional belt driving, the reliable transmission of chain drive mode, durability is good and can also save sky Between.

Chain timing system is made of components such as gear, chain and tensioning devices, and wherein hydraulic tension equipment can automatically adjust Expanding force makes chain tension remain the same from beginning to end, and reliability is higher, also also reduces the use of engine, maintenance cost much.

The intensity of timing chain is high, long service life, but noise is big in operational process, and the requirement to lubrication is high, machine oil When insufficient to amount, the rate of wear is very fast.In the actual use process, ten thousand kilometers of vehicle driving 6-8, it is necessary to timing chain It is checked, driving to 200,000 kilometers will be replaced.The mobility of machine oil is strong, attached thereto when chain stops operating Machine oil can flow back into engine bottom, timing chain is unable to get lubrication when this will lead to engine start, another side Face, for timing chain during high-speed rotation, the lubricating oil adhered on the surface thereof can be got rid of winged, exhaust sprocket and timing chain Lubricant effect at wheel is also poor.The rate of wear is fast when timing chain lubricant effect difference, and motion artifacts are big, with exhaust sprocket and The cooperation precision of timing sprocket can also reduce, and the intake and exhaust of engine is caused to cooperate appearance asynchronous.

Summary of the invention

The object of the present invention is to provide a kind of timing chain system and its engines, by the way that machine oil is directly given to timing chain On the working face of guide rail, timing chain is enable adequately to be lubricated, playing reduces the rate of wear and improve kinematic accuracy Effect.

Above-mentioned purpose of the invention has the technical scheme that

A kind of timing chain system, including air inlet sprocket wheel, exhaust sprocket, timing sprocket, timing chain guide rail, hydraulic expansion Device and the timing chain being centered around on air inlet sprocket wheel, exhaust sprocket and timing sprocket, further includes:

Guide pad is located at the both ends of each timing chain guide rail；

Channel, both ends are connected to the top and bottom of the guide pad respectively；

To grease chamber, there is an input terminal and an output end, input terminal to connect with the hydraulic tension equipment；

Oil pipe, input terminal are connect with the output end to grease chamber, and output end is connect with the channel, for machine oil is defeated It is sent on the top surface of the guide pad.

By using above-mentioned technical proposal, when engine start, machine oil is injected into hydraulic tension equipment by oil pump, hydraulic expanding Machine oil in tight device is flowed into grease chamber, is then flowed on the working surface of each guide pad by oil pipe and channel, timing Chain can uniformly be stained with machine oil during contacting with guide pad.This lubricating system can be such that timing chain obtains Adequately lubrication, especially in vehicle launch, can be replenished in time machine oil to timing chain, avoid dry friction occur when starting Phenomenon.When timing chain lubrication is abundant, it can also improve with the cooperation precision of air inlet sprocket wheel and exhaust sprocket, can guarantee in this way The synchronism of engine breathing door switch and crank rotation makes engine be in a good working order always.

The present invention is further arranged to: the top surface of the guide pad is arcwall face.

By using above-mentioned technical proposal, in the case where equal sized, the contact area of arcwall face and timing chain is wanted Greater than plane, therefore arcwall face can increase the time of contact of formal chain and machine oil, improve the lubricant effect of timing chain.

The present invention is further arranged to: the top surface of the guide pad is equipped with groove, and the bottom surface of the groove is arcwall face.

By using above-mentioned technical proposal, groove can limit the motion profile of timing chain, reduce it in motion process In shaking degree.The movement of timing chain in this way is more steady, can reduce unnecessary mechanical wear, additionally it is possible to make machine oil Attachment that can be more stable is on the surface thereof.

The present invention is further arranged to: the junction rounding off of the groove floor and timing chain guide rail；

The difference in height of the groove highest point and most bottom surface is 0.2-0.3mm.

By using above-mentioned technical proposal, can the contact position of guide pad and timing chain guide rail formed one it is miniature Oil sump, the oil level accommodated in oil sump is more, and more machine oil can be made to be attached on timing chain, improve the profit of timing chain Sliding effect.

The present invention is further arranged to: the bottom surface of the timing chain guide rail is equipped with rectangular through-hole；

The bottom surface of the guide pad is equipped with the locating piece to match with rectangular through-hole；

The locating piece and the rectangular through-hole are interference fitted.

By using above-mentioned technical proposal, locating piece is directly anchored on timing chain guide rail, and this mode does not need to appoint What additional connector, is not in the phenomenon that connector is fallen in use.

The present invention is further arranged to: the channel and the junction of the oil pipe are equipped with metal hose.

By using above-mentioned technical proposal, metal hose can with timing chain guide rail swing or become Shape can be broken to avoid the junction of oil pipe and timing chain guide rail during prolonged use.

The present invention is further arranged to: described to be equipped with one-way guide flow valve to the junction of grease chamber and the hydraulic tension equipment.

By using above-mentioned technical proposal, one-way guide flow valve can be avoided the machine oil in oil pipe and flow back into hydraulic tension equipment It is interior, blastic deformation is caused to the components in hydraulic tension equipment.

The present invention is further arranged to: described to be equipped with relief valve to grease chamber, the relief valve is with described to the interior of grease chamber Chamber connection.

By using above-mentioned technical proposal, relief valve can play the limitation indoor maximum pressure of oil supply, can limit in this way The flow velocity of liquefaction pipe inner engine oil, avoids the machine oil on guide pad excessive, lubricates timing chain transition.

A kind of engine, including any one timing chain system described in above content.

By using above-mentioned technical proposal, more filled using the in-engine timing chain lubrication of the timing chain system Point, work noise is less.

In conclusion advantageous effects of the invention are as follows:

1. when engine start, machine oil is injected into hydraulic tension equipment by oil pump, the machine oil in hydraulic tension equipment is flowed into It to grease chamber, is then flowed on the working surface of each guide pad by oil pipe and channel, timing chain is contacted with guide pad During, it can uniformly be stained with machine oil.This lubricating system can be such that timing chain is adequately lubricated, and especially exist When vehicle launch, machine oil can be replenished in time to timing chain, avoid dry friction phenomenon occur when starting.Timing chain lubrication is filled Timesharing can also improve with the cooperation precision of air inlet sprocket wheel and exhaust sprocket, can guarantee engine breathing door switch in this way With the synchronism of crank rotation, engine is made to be in a good working order always.

2. the groove on guide pad can limit the motion profile of timing chain, its rolling traverse during the motion is reduced Degree.The movement of timing chain in this way is more steady, can reduce unnecessary mechanical wear, additionally it is possible to keep machine oil more steady Fixed attachment is on the surface thereof.

3. the contact position of guide pad and timing chain guide rail forms a miniature oil sump, the oil level accommodated in oil sump is more It is more, more machine oil can be made to be attached on timing chain, improve the lubricant effect of timing chain.

Detailed description of the invention

Fig. 1 is a kind of schematic perspective view that the embodiment of the present invention provides.

Fig. 2 is a kind of diagrammatic cross-section of timing chain guide rail one end that the embodiment of the present invention provides.

Fig. 3 be the embodiment of the present invention provide a kind of timing chain guide rail, oil pipe and guide pad connection schematic diagram.

Fig. 4 be in Fig. 3 A-A to diagrammatic cross-section.

Fig. 5 is the rounding off schematic diagram between a kind of groove and timing chain guide rail that the embodiment of the present invention provides.

In figure, 11, air inlet sprocket wheel；12, exhaust sprocket；13, timing sprocket；14, timing chain guide rail；15, hydraulic expansion Device；16, timing chain；21, guide pad；22, channel；23, grease chamber is given；24, oil pipe；3, groove；41, rectangular through-hole；42, fixed Position block；5, metal hose；6, one-way guide flow valve；7, relief valve.

Specific embodiment

Below in conjunction with attached drawing, invention is further described in detail.

Referring to Fig.1, be a kind of timing chain system disclosed by the invention and its engine, timing chain system mainly by into The composition such as gas sprocket wheel 11, exhaust sprocket 12, timing sprocket 13, timing chain guide rail 14, hydraulic tension equipment 15 and timing chain 16. Air inlet sprocket wheel 11, exhaust sprocket 12 and timing sprocket 13 are separately mounted to admission cam shaft, exhaust cam shaft and engine crankshaft On, 16 sequence of timing chain connects three sprocket wheels.Timing chain guide rail 14 is installed in engine, and effect is to timing chain Item 16 applies pressure, can be in tensioner state.Timing chain guide rail 14 has fixed and two kinds of oscillating-type, fixed Timing chain guide rail 14 is mounted in engine with guide rail positioning bolt, can not be moved；The timing chain guide rail 14 1 of oscillating-type On guide rail positioning bolt, the other end freely swings end cap under the promotion of hydraulic tension equipment 15, applies to timing chain guide rail 14 Add a pressure, which fluctuates with the work of timing chain 16, and the tensile force on timing chain 16 can be made to be maintained at one The a small range of a permission fluctuates.

Referring to figs. 2 and 3, the both ends of timing chain guide rail 14 are respectively mounted with a guide pad 21.The top surface of guide pad 21 It is contacted with timing chain, is arcwall face, offers a groove 3 on the arcwall face, the bottom surface of groove 3 is similarly arcwall face.

With reference to Fig. 5, the solid line in figure is the exact shape of groove 3, and two sections of dotted lines are the theoretical shapes of groove 3.Groove 3 Bottom surface both side have a bit of circular arc, the circular arc can make groove 3 and 14 junction of timing chain guide rail formed one it is round and smooth Transition keeps the transition of junction smooth as far as possible.The difference in height of 3 highest point of groove and most bottom surface is 0.2-0.3mm, in this way may be used To form a small-sized oil sump in the transition position of groove 3 and timing chain guide rail 14, which can store a certain amount of machine Oil is that it is uniformly adhered on timing chain 16.

With reference to Fig. 3 and Fig. 4, the surface that timing chain guide rail 14 is contacted with timing chain 16 is its working face, the working face Both ends offer a rectangular through-hole 41 respectively, correspondingly, having one and 41 phase of rectangular through-hole on the bottom surface of guide pad 21 The locating piece 42 matched, the size of locating piece 42 are slightly larger than the size of rectangular through-hole 41, and when installation is pressed directly into rectangle and led to In hole 41 or cryo-conservation for a period of time, then put it into rectangular through-hole 41.

Offer a channel 22 on each guide pad 21, the both ends in channel 22 respectively with the top surface and bottom of guide pad 21 Face connection, effect is that machine oil is enable to flow on the top surface of guide pad 21.

It is fixed in engine to 23 bolt of grease chamber, which is provided with an input terminal and an output end, input terminal and liquid Tension device 15 is pressed to connect, output end is connect with oil pipe 24.The other end of oil pipe 24 is connect with channel 22, will be in grease chamber 23 Machine oil is imported into oil pipe 24.Deformation and movement in order to avoid timing chain guide rail 14 in use simultaneously, in oil pipe 24 add one section of metal hose 5 with the junction of oil pipe 24.Metal hose 5 can be sent out with the deformation and movement of chain guide 14 Raw deformation, can be such that machine oil is smoothly flowed into channel 22, be not in leakage phenomenon.

Fig. 1 is reviewed, one one-way guide flow valve 6, one-way guide flow are installed to the junction of grease chamber 23 and hydraulic tension equipment 15 Valve 6 can interception function, avoid flowing back into hydraulic tension equipment 15 to the machine oil in grease chamber 23, the part of its inside caused to rush Hit deformation.

To a relief valve 7 is also mounted on grease chamber 23, when excessive to the oil pressure in grease chamber 23, extra machine oil passes through Relief valve 7 is discharged, can limit in this way timing chain guide rail 14 to oil mass, the phenomenon that avoiding the occurrence of over-lubrication.

The implementation principle of the present embodiment are as follows:

When engine start, air inlet sprocket wheel 11, exhaust sprocket 12 and timing sprocket 13 are rotated synchronously, and timing chain 16 is therewith It moves together, machine oil is injected into hydraulic tension equipment 15 by oil pump simultaneously.

Machine oil in hydraulic tension equipment 15 is flowed into in grease chamber 23 after one-way guide flow valve 6, then along oil pipe 24, Metal hose 5 and channel 22 flow in the groove 3 on each guide pad 21.Timing chain 16 is contacted with the bottom surface of groove 3, In During it is moved, machine oil can be adhered on the surface of timing chain 16.In view of the movement speed of formal chain 16 is very fast, because On 3 bottom surface of groove, the lubricant effect of timing chain 16 is unable to reach perfect condition for this.

Machine oil can also be formed other than it can adhere on timing chain 16 in groove 3 and the transition position of timing chain guide rail 14 One oil sump, the oil sump can come into full contact with timing chain 16, lubricate it adequately.

The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it It is interior.