阅读说明：本技术 用于变速系统的执行装置和变速系统 (Actuating device for a transmission system and transmission system ) 是由 冯晓崇 雷鹰 于 2020-04-09 设计创作，主要内容包括：本发明涉及用于变速系统的执行装置和变速系统。公开了一种用于变速系统的执行装置,包括：支承轴；第一套筒,其可滑动地设置在所述支承轴上；换挡拨叉,其固定连接到所述第一套筒并且用于沿所述支承轴往复移动以实现所述变速系统的档位选择；第二套筒,其可滑动地设置在所述支承轴上；和驻车导杆,其固定连接到所述第二套筒并且用于沿所述支承轴往复移动以实现所述变速系统的驻车锁止或驻车释放,其中,所述换挡拨叉和所述驻车导杆能够彼此独立地沿所述支承轴移动。(The invention relates to an actuating device for a speed change system and a speed change system. Disclosed is an actuator for a transmission system, comprising: a support shaft; a first sleeve slidably provided on the support shaft; a shift fork fixedly connected to the first sleeve and adapted to reciprocate along the support shaft to effect gear selection of the transmission system; a second sleeve slidably provided on the support shaft; and a parking guide bar fixedly connected to the second sleeve and for reciprocating along the support shaft to effect parking lock or parking release of the transmission system, wherein the shift fork and the parking guide bar are movable along the support shaft independently of each other.)

1. An actuator for a transmission system comprising:

a support shaft;

a first sleeve slidably provided on the support shaft;

a shift fork fixedly connected to the first sleeve and adapted to reciprocate along the support shaft to effect gear selection of the transmission system;

a second sleeve slidably provided on the support shaft; and

a parking guide rod fixedly connected to the second sleeve and adapted to reciprocate along the support shaft to effect parking lock or parking release of the transmission system,

wherein the shift fork and the parking guide bar are movable along the support shaft independently of each other.

2. The actuator according to claim 1, wherein the first sleeve and/or the second sleeve are axially displaced by two axially opposing pressure units, wherein at least one pressure unit is a pressure-controllable unit comprising a pressure chamber and a pressure channel, the pressure of the pressure chamber being varied by controlling the amount of pressure medium.

3. The actuator according to claim 2, wherein the pressure chamber has an isolating chamber wall which is axially fixed relative to the support shaft and a movable chamber wall which is formed by the first sleeve and/or the second sleeve and is movable relative to the support shaft.

4. An actuator according to claim 2 or 3, wherein one of the two pressure units is a pressure-controllable unit and the other is an elastic element preloaded in the axial direction.

5. An execution device according to claim 2 or 3, wherein the first sleeve is axially moved by a first pressure controllable unit and a second pressure controllable unit,

when the pressure medium in the first pressure chamber of the first pressure controllable unit exerts a force on the first sleeve in a first axial direction which is greater than the force exerted on the first sleeve in a second axial direction by the pressure medium in the second pressure chamber of the second pressure controllable unit, the first sleeve is driven to move on the support shaft in the first axial direction, whereas the first sleeve is driven to move on the support shaft in the second axial direction.

6. The actuator according to claim 5, wherein said second sleeve is axially displaced by means of a third pressure-controllable unit comprising a third pressure chamber and a pre-loaded spring, said support shaft being provided with a first, a second and a third pressure channel communicating with said first, second and third pressure chambers, respectively, and said first, second and third pressure channels being independent from each other.

7. The actuator according to claim 6, wherein the bearing shaft comprises a first hollow shaft and a second hollow shaft which is fitted on the outside of the first hollow shaft, wherein the first and second pressure channels are arranged in the interior of the first hollow shaft and the third pressure channel is arranged axially between the first and second hollow shafts.

8. The actuating device of any one of claims 1 to 3, further comprising a locking unit for holding the second sleeve fixed or movable relative to the support shaft.

9. A transmission system comprising:

the execution device of any one of claims 1 to 8;

a synchronizer, wherein a shift fork of the executing device is in transmission connection with the synchronizer to drive the synchronizer to move;

a parking pawl; and

the parking ratchet wheel, wherein the parking guide rod of the actuating device is in transmission connection with the parking pawl so as to drive the parking pawl to be engaged with or disengaged from the parking ratchet wheel.

10. The transmission system of claim 9, further comprising a housing, wherein the support shaft of the actuator is fixedly connected to the housing.

Technical Field

The present invention relates to a transmission system of a vehicle, and more particularly to an actuator for a transmission system.

Background

A shift fork mechanism and a parking mechanism are generally installed in a transmission system of a vehicle. The shifting fork mechanism is used as a gear shifting executing device for selecting different gears of the speed changing system, and the parking mechanism is used as a parking executing device for ensuring that the vehicle does not slide unexpectedly when parked. Fig. 1 shows a structure of an actuator of a transmission system. As shown in fig. 1, the actuator of the transmission system includes a fork mechanism 110 and a parking mechanism 120. The fork mechanism 110 and the parking mechanism 120 are independent of each other and are separately assembled into a housing of the transmission system. The design of the fork mechanism and the parking mechanism independent of each other can increase the difficulty of assembling the speed changing system and the manufacturing cost. At the same time, this design increases the volume occupied in the transmission system and the vehicle, which is disadvantageous for a compact layout.

For this reason, an integrated actuator for a transmission system is required.

Disclosure of Invention

It is an object of the present invention to provide an integrated actuator for a gear shift system. Another object of the invention is to provide an actuating device for a gear change system which is simple to install. Another object of the present invention is to provide an actuator for a gear shift system that occupies a small space.

One aspect of the present invention provides an actuator for a transmission system, comprising: a support shaft; a first sleeve slidably provided on the support shaft; a shift fork fixedly connected to the first sleeve and adapted to reciprocate along the support shaft to effect gear selection of the transmission system; a second sleeve slidably provided on the support shaft; and a parking guide bar fixedly connected to the second sleeve and for reciprocating along the support shaft to effect parking lock or parking release of the transmission system, wherein the shift fork and the parking guide bar are movable along the support shaft independently of each other. Since the shift fork and the parking lever are arranged together on the same bearing shaft, the actuating device can be of integrated design and can be installed in the transmission system more easily. Furthermore, since the shift fork and the parking guide bar can be moved on the support shaft independently of each other, the shifting and parking functions of the transmission system can be controlled separately to achieve more flexible operation.

According to an embodiment of the invention, the first sleeve and/or the second sleeve are axially displaced by two axially opposing pressure units, wherein at least one of the pressure units is a pressure-controllable unit comprising a pressure chamber and a pressure channel, the pressure of the pressure chamber being varied by controlling the amount of pressure medium.

According to an embodiment of the invention, the pressure chamber has an isolating chamber wall which is axially fixed relative to the bearing shaft and a movable chamber wall which is formed by the first sleeve and/or the second sleeve and is movable relative to the bearing shaft.

According to an embodiment of the invention, one of the two pressure units is a pressure-controllable unit and the other is an elastic element preloaded in the axial direction.

According to an embodiment of the invention, the first sleeve is axially displaceable by means of the first pressure controllable unit and the second pressure controllable unit, the first sleeve being driven to displace in the first axial direction on the support shaft when a force exerted on the first sleeve by a pressure medium in a first pressure chamber of the first pressure controllable unit in the first axial direction is greater than a force exerted on the first sleeve by a pressure medium in a second pressure chamber of the second pressure controllable unit in the second axial direction, and vice versa.

According to an embodiment of the invention, the second sleeve is axially displaceable by means of a third pressure controllable unit comprising a third pressure chamber and a pre-pressure spring, the support shaft being provided with a first, a second and a third pressure channel communicating with the first, the second and the third pressure chamber, respectively, and the first, the second and the third pressure channels being independent of each other.

According to an embodiment of the invention, the bearing shaft comprises a first hollow shaft and a second hollow shaft which is inserted on the outside of the first hollow shaft, wherein the first pressure channel and the second pressure channel are arranged in the interior of the first hollow shaft, and the third pressure channel is arranged axially between the first hollow shaft and the second hollow shaft.

According to an embodiment of the invention, the actuating device further comprises a locking unit for holding the second sleeve fixed or movable relative to the supporting shaft.

Another aspect of the present invention provides a transmission system including: an execution device according to an embodiment of the present invention; the synchronizer is in transmission connection with a gear shifting fork of the executing device so as to drive the synchronizer to move; a parking pawl; and the parking ratchet wheel is in transmission connection with a parking pawl of the actuating device so as to drive the parking pawl to be engaged with or disengaged from the parking ratchet wheel.

According to an embodiment of the invention, the gear shift system further comprises a housing, wherein the supporting shaft of the actuating device is fixedly connected to the housing.

Drawings

Fig. 1 is a schematic structural view of an actuator of a transmission system.

Fig. 2 is a perspective view of an actuator for a transmission system according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of an implement for a transmission system according to an embodiment of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention are described with reference to the drawings. The following detailed description and drawings are illustrative of the principles of the invention, which is not limited to the preferred embodiments described, but is defined by the claims. The invention will now be described in detail with reference to exemplary embodiments thereof, some of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings, in which like reference numerals refer to the same or similar elements in different drawings unless otherwise indicated. The aspects described in the following exemplary embodiments do not represent all aspects of the present invention. Rather, these aspects are merely exemplary of the systems and methods according to the various aspects of the present invention as recited in the appended claims.

The actuator for a transmission system according to the present invention may be mounted on a vehicle. The vehicle may be an internal combustion engine vehicle using an internal combustion engine as a drive source, an electric vehicle or a fuel cell vehicle using an electric motor as a drive source, a hybrid vehicle using both of the above as drive sources, or a vehicle having another drive source.

Fig. 2 is a perspective view of an actuator for a transmission system according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of an implement for a transmission system according to an embodiment of the present invention. As shown in fig. 2 and 3, the speed change system according to the embodiment of the present invention includes an actuator 100. In an exemplary embodiment, the transmission system may further include a housing, a synchronizer, a parking pawl, and a parking ratchet (not shown). The actuator 100, synchronizer, parking pawl and parking ratchet may be housed in a housing of the transmission system.

The actuating device 100 includes a support shaft 10, a first sleeve 20, a second sleeve 30, a shift fork 40, and a parking guide 50. When the actuator 100 is mounted in a vehicle, the support shaft 10 remains stationary relative to the vehicle. In the exemplary embodiment, the support shaft 10 is fixedly connected in a housing of a transmission system of a vehicle.

The first sleeve 20 is fixedly connected to the shift fork 40. The first sleeve 20 is slidably disposed on the support shaft 10 so that the first sleeve 20 can move the shift fork 40 along the support shaft 10. The second sleeve 30 is fixedly coupled to the parking guide bar 50. The second sleeve 30 is slidably disposed on the support shaft 10 such that the second sleeve 30 can move the parking guide bar 50 along the support shaft 10. According to an embodiment of the present invention, the shift fork 40 and the parking guide lever 50 are provided together on the same support shaft 10 and are movable on the support shaft 10 independently of each other.

In the actuating device 100 according to the embodiment of the present invention, the shift fork 40 may be reciprocally moved along the support shaft 10 to select different gear positions of the transmission system, and the parking guide lever 50 may be reciprocally moved along the support shaft 10 to select parking lock or parking release of the transmission system. In some embodiments, the shift fork 40 may be drivingly connected to a synchronizer of the transmission system. For example, as the shift fork 40 drives the synchronizer to move along its drive shaft, the synchronizer may be engaged or disengaged with the corresponding drive gear. In some embodiments, park guide rod 50 may include a tapered portion 51 to engage a park pawl of the transmission system. For example, when the parking guide lever 50 is reciprocally moved along the support shaft 10 together with the second sleeve 30, the tapered portion 51 may move the parking pawl toward engagement with the parking ratchet or toward disengagement from the parking ratchet.

Since the shift fork 40 and the parking guide 50 are arranged together on the same bearing shaft 10, the actuating device 100 can have an integrated design and can be installed in the transmission system more easily. Further, since the shift fork 40 and the parking guide 50 can be moved on the support shaft 10 independently of each other, it is possible to control the shifting and parking functions of the transmission system separately to achieve more flexible operation.

The first sleeve 20 and/or the second sleeve 30 may be axially displaced by two pressure units acting axially against each other. According to some embodiments of the invention, the actuator 100 may drive the movement of the first sleeve 20 and/or the second sleeve 30 on the support shaft 10 in at least one direction by means of a pressure medium, such as a hydraulic liquid. In some embodiments, at least one pressure unit is a pressure controllable unit. The pressure controllable unit may comprise a pressure chamber and a pressure channel, the pressure of which is varied by controlling the amount of pressure medium.

According to some embodiments of the invention, the first sleeve 20 may be driven by pressure medium only, i.e. the first sleeve 20 is axially moved by the first and second pressure controllable units. In the exemplary embodiment, the first pressure controllable unit comprises a pressure chamber 21 and a pressure channel 11; the second pressure controllable unit comprises a pressure chamber 22 and a pressure channel 12. The pressure chamber 21 and the pressure chamber 22 each have an isolating chamber wall 23 which is axially fixed relative to the support shaft 10 and a movable chamber wall formed by the first sleeve 20 which is movable relative to the support shaft 10. As shown in fig. 3, in the first sleeve 20, the pressure chamber 21 and the pressure chamber 22 are axially separated by an isolating chamber wall 23 of the first sleeve 20. The first sleeve 20 can be driven to move on the bearing shaft 10 in one axial direction or in the opposite direction under the action of the pressure medium entering the pressure chamber 21 and/or the pressure medium entering the pressure chamber 22.

In the exemplary embodiment, seals 24 and 25 are also provided in first sleeve 20. For example, as shown in FIG. 3, a seal 24 is disposed at an end of the pressure chamber 21 distal from the isolation chamber wall 23, and a seal 25 is disposed at an end of the pressure chamber 22 distal from the isolation chamber wall 23. The seals 24 and 25 are fixed in position relative to the first sleeve 20 and can be moved together with the first sleeve 20 on the bearing shaft 10 to prevent pressure medium from leaking.

According to some embodiments of the invention, the second sleeve 30 may be driven by both pressure medium and spring, i.e. the second sleeve 30 is axially displaced by a pressure-controllable unit and an axially preloaded elastic element. In the exemplary embodiment, the first pressure controllable unit comprises a pressure chamber 31 and a pressure channel 13. The resilient element is a pre-stressed spring 32 arranged in the second sleeve 30. The pressure chamber 31 has an isolating chamber wall 33 which is axially fixed relative to the bearing shaft 10 and a movable chamber wall formed by the second sleeve 30 which is movable relative to the bearing shaft 10. As shown in fig. 3, in the second sleeve 30, the pressure chamber 31 and the spring 32 are axially separated by an isolating chamber wall 33 of the second sleeve 30. For example, the spring 32 may be a compression spring. Under the action of the pressure medium entering the pressure chamber 31 and the spring 32, the second sleeve 30 can be driven to move in one axial direction or in the opposite direction on the bearing shaft 10.

In the exemplary embodiment, a seal 34 is also disposed in second sleeve 30. For example, as shown in FIG. 3, a seal 34 is disposed at an end of the pressure chamber 31 distal from the insulating chamber wall 33. The seal 34 is fixed in position relative to the second sleeve 30 and can be moved together with the second sleeve 30 on the bearing shaft 10 in order to prevent pressure medium from leaking.

In the exemplary embodiment, as shown in fig. 3, pressure channel 11 communicates with pressure chamber 21, pressure channel 12 communicates with pressure chamber 22, and pressure channel 13 communicates with pressure chamber 31. Thereby, pressure medium can enter the pressure chamber 21 via the pressure channel 11, the pressure chamber 22 via the pressure channel 12 and the pressure chamber 31 via the pressure channel 13. The pressure medium can come from a pressure medium reservoir, not shown.

In an exemplary embodiment, the support shaft 10 may include a first hollow shaft 110 and a second hollow shaft 120. The second hollow shaft 120 is sleeved outside the first hollow shaft 110. The pressure channel 11 and the pressure channel 12 are arranged inside the first hollow shaft 110. The pressure channel 13 is arranged axially between the first hollow shaft 110 and the second hollow shaft 120. The pressure channels 11, 12 and 13 are independent of each other.

As shown in fig. 3, the first hollow shaft 110 includes an outlet 111, an outlet 112, an inlet 113, and an inlet 114, and the second hollow shaft 120 includes an outlet 121, an outlet 122, an outlet 123, and an inlet 124. In some embodiments, outlet 111 and outlet 112 are disposed on a radial tube wall of first hollow shaft 110, and inlet 113 and inlet 114 are disposed at an axial end of first hollow shaft 110. In some embodiments, outlet 121, outlet 122, outlet 123, and inlet 124 are disposed on a radial tube wall of second hollow shaft 120. The outlet 111 and the outlet 121 correspond in the axial direction and the radial direction and communicate with each other. The outlet 112 and the outlet 122 correspond in the axial direction and the radial direction and communicate with each other.

The first hollow shaft 110 may further include a partition wall 114 for partitioning the pressure channel 11 and the pressure channel 12. The support shaft 10 may further include a plurality of sealing rings 130 respectively disposed between the first and second hollow shafts 110 and 120. For example, the sealing ring 130 may be disposed in the ring groove 115 located radially outside the first hollow shaft 110.

As indicated by arrow a in fig. 3, pressure medium may flow from the inlet 113 into the pressure channel 11 and out of the pressure channel 11 via the outlet 111 and the outlet 121 into the pressure chamber 21. As indicated by arrow B in fig. 3, pressure medium may flow from the inlet 114 into the pressure channel 12 and out of the pressure channel 12 via the outlet 112 and the outlet 122 into the pressure chamber 21. As indicated by arrow C in fig. 3, pressure medium may flow from the inlet 124 into the pressure channel 13 and out of the pressure channel 13 via the outlet 123 into the pressure chamber 31.

According to some embodiments of the invention, the actuating device 100 may further comprise a locking unit 60 for locking or unlocking the movement of the second sleeve 30 relative to the supporting shaft 10. In an exemplary embodiment, as shown in fig. 3, the spring 32 is pre-stressed when the second sleeve 30 is in the locked state. The locking unit 60 may include a locking pin 61 and an electromagnet 62. Correspondingly, the second sleeve 30 may further include a locking groove 33 corresponding to the locking pin 61. The locking unit 60 may be disposed outside the second sleeve 30. In some embodiments, the locking unit 60 may be constructed separately from the other components of the implement 100 and separately mounted to the housing of the transmission system.

According to some embodiments of the present invention, when the electromagnet 62 is not energized, the lock pin 61 protrudes into the lock groove 33 of the second sleeve 30, so that the second sleeve 30 and the parking guide lever 50 remain fixed relative to the support shaft 10; when the electromagnet 62 is energized, the lock pin 61 is retracted from the lock groove 33 by the electromagnet 62, so that the second sleeve 30 and the parking guide lever 50 can be moved along the support shaft 10. The second sleeve 30 and the parking guide bar 50 may be maintained in the non-parking position by the locking unit 60 in a default state.

Next, an operation procedure of the execution apparatus according to the embodiment of the present invention will be described with reference to fig. 3.

When the pressure medium in the pressure chamber 21 exerts a force on the first sleeve 20 in the axial direction a1 that is greater than the force that the first sleeve 20 is subjected to in the axial direction a2 (e.g., the pressure medium enters only the pressure chamber 21 and does not enter the pressure chamber 22, or the pressure medium in the pressure chamber 21 has a pressure that is greater than the pressure medium in the pressure chamber 22), the first sleeve 20 is driven to move on the support shaft 10 in the axial direction a1, thereby causing the shift fork 40 to perform a corresponding shift operation, such as a downshift.

When the pressure medium in the pressure chamber 22 exerts a force on the first sleeve 20 in the axial direction a2 that is greater than the force that the first sleeve 20 is subjected to in the axial direction a1 (e.g., the pressure medium only enters the pressure chamber 22 and not the pressure chamber 21, or the pressure medium in the pressure chamber 22 has a pressure that is greater than the pressure medium in the pressure chamber 21), the first sleeve 20 is driven to move on the support shaft 10 in the axial direction a2, thereby causing the shift fork 40 to perform a corresponding shift operation, such as a gear shift.

When the locking pin 61 is retracted from the locking groove 33 and the pressure medium in the pressure chamber 31 exerts a force on the second sleeve 30 in the axial direction a1 that is greater than the force exerted by the spring 32 on the second sleeve 30 in the axial direction a2 (e.g., the force exerted on the second sleeve 30 by the pressure medium entering the pressure chamber 31 via the pressure passage 12 may overcome the biasing force of the spring 32), the first sleeve 20 is driven to move in the axial direction a1 on the support shaft 10, thereby bringing the parking guide rod 50 to perform a parking-related operation, such as a parking release.

When the locking pin 61 is retracted from the locking groove 33 and the spring 32 applies a force to the second sleeve 30 in the axial direction a2 that is greater than the force to which the second sleeve 30 is subjected in the axial direction a1 (e.g., the pressure medium does not enter the pressure chamber 31, or the pressure medium entering the pressure chamber 31 via the pressure channel 12 does not apply a force to the second sleeve 30 sufficient to overcome the biasing force of the spring 32), the first sleeve 20 is driven to move in the axial direction a2 on the support shaft 10, thereby bringing the parking guide rod 50 to perform a parking-related operation, such as parking locking.

The pressure medium is described above as being a hydraulic liquid. However, the present invention is not limited thereto. According to an embodiment of the invention, the pressure medium may also be a gas.

The pressure medium is described above as entering the pressure chambers of the first sleeve 20 and the second sleeve 30 via the pressure channels provided in the bearing shaft 10. However, the present invention is not limited thereto. According to an embodiment of the invention, the pressure medium may also enter the pressure chamber via other paths, such as a separate pressure medium conduit or the like.

It is described above that the pressure chamber 31 is provided on the side of the axial direction a1 of the isolation chamber wall 33, and the spring 32 is provided on the side of the axial direction a2 of the isolation chamber wall 33. However, the present invention is not limited thereto. According to an embodiment of the present invention, the pressure chamber 31 may be provided on the side of the axial direction a2 of the isolation chamber wall 33, and the spring 32 may be provided on the side of the axial direction a1 of the isolation chamber wall 33.

It was described above that the first sleeve 20 is driven by pressure medium only and the second sleeve 30 is driven by both pressure medium and spring. However, the present invention is not limited thereto. According to an embodiment of the invention, the first sleeve 20 may also be spring driven on at least one side, while the second sleeve 30 may also be driven by pressure medium only. In addition, the first sleeve 20 and the second sleeve 30 may be driven by other means.

The above description illustrates the second sleeve 30 using a locking unit having a locking pin and an electromagnet to cause the parking guide 50 to default to the non-parking position. However, the present invention is not limited thereto. According to embodiments of the present invention, the parking guide 50 may also be held in the non-parking position by other means. For example, the second sleeve 30 and the parking guide rod 50 may be held in the out-of-park position by maintaining a sufficient pressure of the pressure medium in the pressure chamber 31.

While the invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the construction and methods of the embodiments described above. On the contrary, the invention is intended to cover various modifications and equivalent arrangements. In addition, while the various elements and method steps of the disclosed invention are shown in various example combinations and configurations, other combinations, including more, less or all, of the elements or methods are also within the scope of the invention.