Electrically-driven clutch actuating mechanism

Abstract

The utility model discloses an electric drive clutch actuating mechanism which comprises a shell, a lead screw is arranged in the shell, a push rod sliding sleeve is sleeved on the lead screw, and the lead screw can drive the push rod sliding sleeve to move. A clutch separation push rod is further arranged on the push rod sliding sleeve, the central axis of the clutch separation push rod is parallel to the central axis of the lead screw, and the push rod sliding sleeve can drive the clutch separation push rod to move. The push rod sliding sleeve is further provided with a plurality of sliding rail penetrating holes, the central axis of each sliding rail penetrating hole is parallel to the central axis of the lead screw, a push rod sliding rail is arranged in each sliding rail penetrating hole in a sleeved mode, the two axial ends of each push rod sliding rail are connected with the inner wall of the shell, and the push rod sliding sleeve can further be fed back and forth along the push rod sliding rails. The push rod sliding sleeve is connected with the lead screw and the multiple sliding rails at the same time, radial limiting of the clutch separation push rod is achieved, unbalanced force can be reduced when the clutch separation push rod moves with loads, and the starting and gear shifting comfort of the electric control mechanical automatic transmission is improved.

Description

Technical Field

[0001] This utility model belongs to the field of transmission technology, and relates to clutches, specifically to an electric drive clutch actuator. Background Technology

[0002] Currently, some vehicles equipped with electromechanical automatic transmissions exhibit issues such as long start-up times, start-up shudder, long shift times, and shift jerking. Since the clutch actuator directly affects the comfort of starting and shifting during vehicle operation, improvements to the clutch actuator's structure and drive mechanism are necessary to optimize these performance characteristics. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an electric drive clutch actuator to solve the technical problem that the comfort of starting and shifting in the existing electromechanical automatic transmission needs to be further improved.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An electrically driven clutch actuator includes a housing, within which a lead screw is disposed, and a push rod sleeve is fitted onto the lead screw. Rotation of the lead screw can drive the push rod sleeve to feed back and forth along the axial direction of the lead screw.

[0006] The push rod sleeve is also provided with a clutch release push rod, which is located on the radial upper side of the lead screw. The central axis of the clutch release push rod is parallel to the central axis of the lead screw. The push rod sleeve is connected to one end of the clutch release push rod, and the forward and backward feed of the push rod sleeve can drive the clutch release push rod to feed forward and backward along the axial direction.

[0007] The push rod sleeve is also provided with a third slide rail through hole. The central axis of the third slide rail through hole is parallel to the central axis of the lead screw. The third slide rail through hole is located on the radial lower side of the lead screw. The housing is also provided with a third slide rail. The push rod sleeve is also fitted onto the third slide rail through the third slide rail through hole. The two axial ends of the third slide rail are respectively connected to the inner wall of the housing. The push rod sleeve can be fed back and forth along the axial direction of the third slide rail.

[0008] The push rod sleeve has a first slide rail through hole, the central axis of which is parallel to the central axis of the lead screw. The first slide rail through hole is located on the radial upper side of the clutch release push rod. The housing contains a first slide rail, and the push rod sleeve is also fitted onto the first slide rail through the first slide rail through hole. The two axial ends of the first slide rail are connected to the inner wall of the housing, and the push rod sleeve can be fed back and forth along the axial direction of the first slide rail.

[0009] The push rod sleeve is also provided with a second slide rail through hole. The central axis of the second slide rail through hole and the central axis of the lead screw are parallel to each other. The second slide rail through hole is located between the clutch release push rod and the lead screw. The housing is also provided with a second slide rail. The push rod sleeve is also fitted onto the second slide rail through the second slide rail through hole. The two axial ends of the second slide rail are respectively connected to the inner wall of the housing. The push rod sleeve can be fed back and forth along the axial direction of the second slide rail.

[0010] This utility model also has the following technical features:

[0011] Specifically, the distance between the central axis of the first slide rail perforation and the central axis of the clutch release push rod is equal to the distance between the central axis of the second slide rail perforation and the central axis of the clutch release push rod.

[0012] Specifically, the distance between the central axis of the second slide rail hole and the central axis of the lead screw is equal to the distance between the central axis of the third slide rail hole and the central axis of the lead screw.

[0013] Specifically, the housing is also provided with a push rod through hole that penetrates the axial front wall, and the other end of the clutch release push rod extends through the push rod through hole to the outside of the housing.

[0014] Specifically, the lead screw includes a lead screw threaded section and a lead screw drive shaft, which are coaxially arranged and have an interference fit; the push rod sleeve is fitted on the lead screw threaded section.

[0015] A front bearing support frame is provided on the inner side wall of the axial front end of the housing, a front bearing is provided inside the front bearing support frame, and the axial front end of the lead screw drive shaft is coaxially provided inside the front bearing.

[0016] The outer side of the axial rear end of the housing is also provided with a rear end bearing mounting bracket, and a rear end bearing is provided inside the rear end bearing mounting bracket. The axial rear end of the housing is also provided with a drive shaft through hole that passes through the axial rear wall. The axial rear end of the lead screw drive shaft can pass through the drive shaft through hole and be coaxially fitted inside the rear end bearing.

[0017] Specifically, a drive motor is also provided on the outer side of the axial rear end of the rear bearing mounting bracket. The output shaft of the drive motor is connected to the axial rear end of the lead screw drive shaft, and the rotation of the output shaft of the drive motor can drive the lead screw drive shaft.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] (I) In this utility model device, the axial ends of the first sliding sleeve rail, the second sliding sleeve rail, and the third sliding sleeve rail are all fixed on the housing. The push rod sliding sleeve is simultaneously connected to the lead screw and the first sliding sleeve rail, the second sliding sleeve rail, and the third sliding sleeve rail, thereby realizing the radial limit of the clutch release push rod. When the clutch release push rod moves under load, it can reduce the unbalanced force and counteract the torque acting on the push rod sliding sleeve and the clutch release push rod, thereby improving the comfort of starting and shifting of the electromechanical automatic transmission.

[0020] (II) The device of this utility model has a simple and compact structure, low cost, high reliability and simple control, and is easy to implement. At the same time, its performance can meet the requirements of rapid clutch disengagement and flexible engagement. It can significantly optimize the vibration problem during start-up and gear shifting and shorten the power interruption time during gear shifting. Compared with the pneumatic gear shifting actuator, the device of this utility model is easier to control the clutch in a refined manner and can effectively improve the shifting quality of AMT gearbox. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the device in this utility model.

[0022] The meanings of the labels in the diagram are as follows: 1-Housing, 2-Lead screw, 3-Push rod sleeve, 4-Clutch release push rod, 5-First sleeve rail, 6-Second sleeve rail, 7-Third sleeve rail, 8-Push rod through hole, 9-Front end bearing support bracket, 10-Front end bearing, 11-Rear end bearing mounting bracket, 12-Rear end bearing, 13-Drive shaft through hole, 14-Drive motor.

[0023] 201 - Lead screw thread section, 202 - Lead screw drive shaft.

[0024] 301 - First slide rail perforation, 302 - Second slide rail perforation, 303 - Third slide rail perforation.

[0025] Ⅰ - Clutch disengagement position, Ⅱ - Clutch engagement position.

[0026] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, all equipment and components in this utility model are based on existing technologies. For example, the AMT transmission uses a known AMT transmission, the drive motor uses a known drive motor, the lead screw uses a known lead screw, and the push rod sleeve uses a known push rod sleeve.

[0028] In this invention, TCU refers to the transmission control unit, and the transmission control unit adopts a commonly known transmission control unit.

[0029] In this invention, AMT refers to an electromechanical automatic transmission.

[0030] Following the above technical solution, the following are specific embodiments of this utility model. It should be noted that this utility model is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solution of this application fall within the protection scope of this utility model.

[0031] Example:

[0032] This embodiment provides an electrically driven clutch actuator, such as... Figure 1 As shown, it includes a housing 1, inside which a lead screw 2 is installed, and a push rod sleeve 3 is fitted on the lead screw 2. The rotation of the lead screw 2 can drive the push rod sleeve 3 to feed back and forth along the axial direction of the lead screw 2.

[0033] like Figure 1 As shown, a clutch release push rod 4 is also provided on the push rod sleeve 3. The clutch release push rod 4 is located on the radial upper side of the lead screw 2, and the central axis of the clutch release push rod 4 is parallel to the central axis of the lead screw 2. The push rod sleeve 3 is connected to one end of the clutch release push rod 4, and the forward and backward feed of the push rod sleeve 3 can drive the clutch release push rod 4 to feed forward and backward along the axial direction.

[0034] like Figure 1 As shown, the push rod sleeve 3 is also provided with a third slide rail through hole 303. The central axis of the third slide rail through hole 303 is parallel to the central axis of the lead screw 2. The third slide rail through hole 303 is located on the radial lower side of the lead screw 2. The housing 1 is also provided with a third slide rail 7. The push rod sleeve 3 is also fitted onto the third slide rail 7 through the third slide rail through hole 303. The two axial ends of the third slide rail 7 are respectively connected to the inner wall of the housing 1. The push rod sleeve 3 can be fed back and forth along the axial direction of the third slide rail 7.

[0035] like Figure 1As shown, the push rod sleeve 3 has a first slide rail through hole 301. The central axis of the first slide rail through hole 301 is parallel to the central axis of the lead screw 2. The first slide rail through hole 301 is located on the radial upper side of the clutch release push rod 4. The housing 1 has a first slide rail 5. The push rod sleeve 3 is also fitted onto the first slide rail 5 through the first slide rail through hole 301. The two axial ends of the first slide rail 5 are connected to the inner wall of the housing 1 respectively. The push rod sleeve 3 can be fed back and forth along the axial direction of the first slide rail 5.

[0036] like Figure 1 As shown, the push rod sleeve 3 is also provided with a second slide rail through hole 302. The central axis of the second slide rail through hole 302 and the central axis of the lead screw 2 are parallel to each other. The second slide rail through hole 302 is located between the clutch release push rod 4 and the lead screw 2. The housing 1 is also provided with a second slide rail 6. The push rod sleeve 3 is also fitted onto the second slide rail 6 through the second slide rail through hole 302. The two axial ends of the second slide rail 6 are respectively connected to the inner wall of the housing 1. The push rod sleeve 3 can be fed back and forth along the axial direction of the second slide rail 6.

[0037] As a preferred embodiment of this invention, such as Figure 1 As shown, the distance between the central axis of the first slide rail through hole 301 and the central axis of the clutch release push rod 4 is equal to the distance between the central axis of the second slide rail through hole 302 and the central axis of the clutch release push rod 4.

[0038] As a preferred embodiment of this invention, such as Figure 1 As shown, the distance between the central axis of the second slide rail through hole 302 and the central axis of the lead screw 2 is equal to the distance between the central axis of the third slide rail through hole 303 and the central axis of the lead screw 2.

[0039] As a preferred embodiment of this invention, such as Figure 1 As shown, the housing 1 is also provided with a push rod through hole 8 that penetrates the axial front wall, and the other end of the clutch release push rod 4 extends through the push rod through hole 8 to the outside of the housing 1.

[0040] As a preferred embodiment of this invention, such as Figure 1 As shown, the lead screw 2 includes a lead screw thread section 201 and a lead screw drive shaft 202. The lead screw drive shaft 202 and the lead screw thread section 201 are coaxially arranged, and the lead screw thread section 201 and the lead screw drive shaft 202 are interference fit; the push rod sleeve 3 is fitted on the lead screw thread section 201 of the lead screw 2.

[0041] like Figure 1 As shown, a front bearing support frame 9 is provided on the inner side wall of the axial front end of the housing 1, a front bearing 10 is provided inside the front bearing support frame 9, and the axial front end of the lead screw drive shaft 202 is coaxially provided inside the front bearing 10.

[0042] like Figure 1 As shown, a rear bearing mounting bracket 11 is also provided on the outer side of the axial rear end of the housing 1, and a rear bearing 12 is provided inside the rear bearing mounting bracket 11. A drive shaft through hole 13 that penetrates the axial rear wall is also provided on the axial rear end of the housing 1. The axial rear end of the lead screw drive shaft 202 can pass through the drive shaft through hole 13 and be coaxially fitted inside the rear bearing 12.

[0043] As a preferred embodiment of this invention, such as Figure 1 As shown, a drive motor 14 is also provided on the outer side of the axial rear end of the rear bearing mounting bracket 11. The output shaft of the drive motor 14 is connected to the axial rear end of the lead screw drive shaft 202. The rotation of the output shaft of the drive motor 14 can drive the lead screw drive shaft 202.

[0044] In this embodiment, the rotation of the output shaft of the drive motor 14 can drive the rotation of the lead screw 2, the rotation of the lead screw 2 can drive the push rod sleeve 3 to feed back and forth along the axial direction of the lead screw 2, and the movement of the push rod sleeve 3 can drive the clutch disengagement push rod 4 to feed back and forth along the axial direction.

[0045] In this embodiment, when the clutch is disengaged, the clutch disengagement push rod 4 moves forward to the axial foremost end of the screw thread section 201, that is, when the push rod sleeve 3 is in the clutch disengagement position I, the clutch disengagement push rod 4 pushes the clutch diaphragm spring to complete the clutch disengagement; similarly, when the clutch is engaged, under the clutch's own elastic force and the reverse rotation of the output shaft of the drive motor 14, the clutch disengagement push rod 4 is driven to move backward to the clutch engagement position II, which can smoothly realize the clutch engagement process and improve the comfort of starting and shifting gears.

[0046] Compared with the prior art, the device in this embodiment can reduce the unbalanced force when the clutch release push rod 4 moves under load. The radial force on the clutch release push rod 4 during the movement can be overcome by the first sliding sleeve rail 5, the second sliding sleeve rail 6 and the third sliding sleeve rail 7, leaving only the axial force.

[0047] In this embodiment, the power transmission route is as follows: drive motor 14, lead screw drive shaft 202, lead screw thread section 201, push rod sleeve 3, and clutch release push rod 4. The clutch release push rod 4 can also act on the clutch release fork to complete the clutch separation and engagement.

[0048] The clutch release fork in this embodiment is a clutch release fork commonly used in the art.

[0049] In this embodiment, the axial front end of the lead screw drive shaft 202 is mounted on the housing 1 via the front bearing 10 and the front bearing support 9; the axial rear end of the lead screw drive shaft 202 is also mounted via the rear bearing 12 and the rear bearing mounting bracket 11; the axial ends of the first sliding sleeve rail 5, the second sliding sleeve rail 6 and the third sliding sleeve rail 7 are all fixed on the housing 1, and the push rod sliding sleeve 3 is simultaneously connected to the lead screw 2 and the first sliding sleeve rail 5, the second sliding sleeve rail 6 and the third sliding sleeve rail 7 to achieve radial limiting of the clutch separation push rod 4.

[0050] The working process of the device in this embodiment is as follows:

[0051] Clutch disengagement process: The drive motor 14 rotates, driving the lead screw 2, which in turn drives the push rod sleeve 3 to move. The push rod sleeve 3 moves simultaneously on the first sleeve rail 5, the second sleeve rail 6, and the third sleeve rail 7. The movement of the push rod sleeve 3 can also drive the movement of the clutch disengagement push rod 4. When the push rod sleeve 3 moves to the clutch disengagement position I, the clutch disengagement can be achieved quickly. In this embodiment, the central axis of the lead screw 2 does not coincide with the central axis of the clutch release push rod 4. Without the first sliding sleeve rail 5, the second sliding sleeve rail 6, and the third sliding sleeve rail 7, when the clutch release push rod 4 is driving a load, a torque will be generated on the push rod sliding sleeve 3 and the clutch release push rod 4 due to the combined effect of the power transmitted by the lead screw 2 and the load resistance, severely affecting the structural lifespan. Adding the first sliding sleeve rail 5, the second sliding sleeve rail 6, and the third sliding sleeve rail 7, which are parallel to the lead screw 2, can effectively counteract the torque acting on the push rod sliding sleeve 3 and the clutch release push rod 4. The lead screw 2 does not require a limit device during movement. In practical applications, the clutch can be precisely and quickly disengaged simply by controlling the speed and rotation angle of the drive motor 14 through the TCU of the AMT transmission.

[0052] Clutch engagement process: When the clutch release push rod 4 moves to the clutch disengagement position I, the clutch is disengaged, and then the drive motor 14 reverses to engage the clutch. The drive motor 14 drives the lead screw 2, which in turn drives the push rod sleeve 3 to move. This, in turn, drives the push rod sleeve 3 to move along the first sleeve rail 5, the second sleeve rail 6, and the third sleeve rail 7 simultaneously. When the clutch release push rod 4 moves to the clutch engagement position II, the clutch can be quickly engaged. During this process, the rotation phase of the lead screw is precisely controlled to achieve smooth starting and gear shifting.

Claims

1. An electrically driven clutch actuator mechanism, comprising a housing (1) in which a screw rod (2) is arranged, a push rod sleeve (3) being sleeved on the screw rod (2), and rotation of the screw rod (2) being capable of driving the push rod sleeve (3) to feed forward and backward along the axial direction of the screw rod (2); the push rod sleeve (3) is further provided with a clutch separation push rod (4), the clutch separation push rod (4) is arranged on the radial upper side of the screw rod (2), the central axis of the clutch separation push rod (4) and the central axis of the screw rod (2) are parallel to each other; one end of the push rod sleeve (3) is connected with the clutch separation push rod (4), and forward and backward feeding of the push rod sleeve (3) is capable of driving the clutch separation push rod (4) to feed forward and backward along the axial direction; the push rod sleeve (3) is further provided with a third slide rail through hole (303), the central axis of the third slide rail through hole (303) and the central axis of the screw rod (2) are parallel to each other, and the third slide rail through hole (303) is arranged on the radial lower side of the screw rod (2); the housing (1) is further provided with a third slide sleeve slide rail (7), the push rod sleeve (3) is further sleeved on the third slide sleeve slide rail (7) through the third slide rail through hole (303), and the axial two ends of the third slide sleeve slide rail (7) are respectively connected with the inner wall of the housing (1); the push rod sleeve (3) is capable of feeding forward and backward along the axial direction of the third slide sleeve slide rail (7). Characterized in that: the push rod sleeve (3) is provided with a first slide rail through hole (301), the central axis of the first slide rail through hole (301) and the central axis of the screw rod (2) are parallel to each other, and the first slide rail through hole (301) is arranged on the radial upper side of the clutch separation push rod (4); the housing (1) is provided with a first slide sleeve slide rail (5), the push rod sleeve (3) is further sleeved on the first slide sleeve slide rail (5) through the first slide rail through hole (301), the axial two ends of the first slide sleeve slide rail (5) are respectively connected with the inner wall of the housing (1), and the push rod sleeve (3) is capable of feeding forward and backward along the axial direction of the first slide sleeve slide rail (5); the push rod sleeve (3) is further provided with a second slide rail through hole (302), the central axis of the second slide rail through hole (302) and the central axis of the screw rod (2) are parallel to each other, and the second slide rail through hole (302) is arranged between the clutch separation push rod (4) and the screw rod (2); the housing (1) is further provided with a second slide sleeve slide rail (6), the push rod sleeve (3) is further sleeved on the second slide sleeve slide rail (6) through the second slide rail through hole (302), the axial two ends of the second slide sleeve slide rail (6) are respectively connected with the inner wall of the housing (1), and the push rod sleeve (3) is capable of feeding forward and backward along the axial direction of the second slide sleeve slide rail (6). The distance between the central axis of the first slide rail through hole (301) and the central axis of the clutch separation push rod (4) is equal to the distance between the central axis of the second slide rail through hole (302) and the central axis of the clutch separation push rod (4). ​ ​ ​ 2. The electric drive clutch actuator of claim 1, wherein, ​ 3. The electric drive clutch actuator of claim 1, wherein, The distance between the central axis of the second slide rail perforation (302) and the central axis of the lead screw (2) is equal to the distance between the central axis of the third slide rail perforation (303) and the central axis of the lead screw (2).

4. The electric drive clutch actuator of claim 1, wherein, The housing (1) is further provided with a push rod perforation (8) penetrating the axial front wall, and the other end of the clutch separation push rod (4) extends to the outside of the housing (1) through the push rod perforation (8).

5. The electric drive clutch actuator of claim 1, wherein, The lead screw (2) comprises a lead screw threaded segment (201) and a lead screw transmission shaft (202), the lead screw transmission shaft (202) and the lead screw threaded segment (201) are coaxially arranged, and the lead screw threaded segment (201) and the lead screw transmission shaft (202) are in interference fit; the push rod sliding sleeve (3) is sleeved on the lead screw threaded segment (201) of the lead screw (2); The axial front end inner side wall of the housing (1) is provided with a front end bearing support frame (9), the front end bearing support frame (9) is provided with a front end bearing (10) inside, and the axial front end of the front end bearing (10) is coaxially provided with the axial front end of the lead screw transmission shaft (202); The axial rear end outer side of the housing (1) is further provided with a rear end bearing mounting bracket (11), the rear end bearing mounting bracket (11) is provided with a rear end bearing (12) inside, and the axial rear end of the housing (1) is further provided with a transmission shaft perforation (13) penetrating the axial rear wall, and the axial rear end of the lead screw transmission shaft (202) can pass through the transmission shaft perforation (13) and be coaxially sleeved inside the rear end bearing (12).

6. The electric drive clutch actuator of claim 5, wherein, The axial rear end outer side of the rear end bearing mounting bracket (11) is further provided with a driving motor (14), the output shaft of the driving motor (14) is connected with the axial rear end of the lead screw transmission shaft (202), and the rotation of the output shaft of the driving motor (14) can drive the lead screw transmission shaft (202).

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