Push rod type clutch executing mechanism

Abstract

The utility model relates to an automobile transmission part, and provides a push rod type clutch actuating mechanism in order to solve the problems of long starting time, starting shaking, long gear shifting time or gear shifting pause caused by the fact that an existing automobile clutch actuating mechanism is driven by air pressure. The transmission shaft holder is connected to the side face of the shell, the transmission shaft is connected with the output end of the driving motor, the transmission shaft is sleeved with the worm, the worm gear is meshed with the worm, one end of the crank shaft is arranged on the side surface of the worm, one end of the rocker is connected with the crank shaft, and the rocker shaft is connected with the other end of the rocker. And a push rod; the rocker shaft is arranged at one end of the push rod; a worm-wheel shaft is arranged in the center of the worm wheel; a first through hole is formed in the end, close to the clutch, of the shell. The push rod can penetrate through the first through hole to reciprocate under cooperation of the worm gear and the rocker. The other end of the push rod is connected with the shifting fork and used for achieving gear shifting of the clutch.

Description

Technical Field

[0001] The utility model relates to an automotive transmission component, in particular to a push-rod type clutch actuator. Background Art

[0002] With the rapid development of the automotive industry, people have higher requirements for the driving comfort of commercial vehicles, and at the same time, there are also demands for low cost and high efficiency. Electric control mechanical automatic transmissions are widely used in the commercial vehicle field in some regions and the small-displacement passenger vehicle field. At present, the development of domestic electric control mechanical automatic transmissions is still in a rapid upward period. Vehicles using the existing pneumatic drive type clutch actuator are prone to problems such as long starting time, starting jitter, long shifting time or shifting jerks. During the operation of the vehicle, the clutch actuator will directly affect the comfort of starting and shifting. Therefore, improving its structure and driving method will appropriately optimize the above-mentioned poor performances.

[0003] Chinese Patent CN215890858U discloses a clutch actuator and a vehicle having the same, which includes a housing and a reduction gear, a push rod, a first guide sleeve pin shaft and a second guide sleeve pin shaft arranged in the inner cavity of the housing. The reduction gear is hinged in the inner cavity of the housing through a reduction gear pin shaft. The push rod is hinged to the reduction gear through a push rod support pin shaft. The first guide sleeve pin shaft and the second guide sleeve pin shaft are respectively fixed on the inner cavities of the reduction gear and the housing. A first spring guide sleeve is pressed on the first guide sleeve pin shaft, and a second spring guide sleeve is pressed on the second guide sleeve pin shaft. A spring is sleeved between the first spring guide sleeve and the second spring guide sleeve. However, the deficiencies of this prior art are: complex structure. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems of long starting time, starting jitter, long shifting time or shifting jerks existing in the existing vehicle clutch actuator driven by air pressure, and the problem of complex structure existing in the push-rod drive, and to provide a push-rod type clutch actuator.

[0005] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0006] A push-rod type clutch actuator, characterized in that:

[0007] It includes a push rod, a transmission shaft, a housing, a driving motor and a transmission shaft cage arranged outside the housing, a worm, a worm gear shaft, a worm gear, a crank shaft, a rocker, and a rocker shaft arranged in the housing;

[0008] One end of the transmission shaft is arranged on the transmission shaft cage through a bearing and connected to the output end of the driving motor, and the other end of the transmission shaft extends into the housing; the worm is sleeved on the transmission shaft, and the worm gear is arranged on the housing through a worm gear shaft and meshes with the worm; one end of the rocker is connected to the side surface of the worm gear through a crank shaft;

[0009] The housing is fixed in the transmission assembly, and a first through hole is arranged at one end of the housing close to the clutch. One end of the push rod passes through the first through hole and extends into the housing, and is connected to the other end of the rocker through a rocker shaft; the push rod can reciprocate through the first through hole under the cooperation of the worm gear and the rocker; the other end of the push rod is connected to the shift fork to realize the engagement and separation of the clutch.

[0010] Further, the driving motor is electrically connected to the TCU, and the driving motor is used to control the rotation stroke of the transmission shaft.

[0011] Further, the inner ring of the bearing is connected to the transmission shaft, and the outer ring is in interference fit with the transmission shaft cage.

[0012] Further, the worm is fixed in the housing through a worm support frame.

[0013] Further, a push rod guide sleeve is arranged on the inner wall of the first through hole, and the push rod guide sleeve is connected to the inner wall of the housing through a push rod guide sleeve support frame.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. The push rod type clutch actuator provided by the present utility model adopts a structure of cooperation between a worm gear and a crank, and can realize precise adjustment of the push rod stroke in cooperation with a driving motor, meeting the requirements of rapid separation and flexible engagement of the clutch, and can significantly optimize problems such as long starting time, starting jitter, long shifting time or shifting jerks, and shorten the time of shifting power interruption, effectively improving the shifting quality of the AMT transmission.

[0016] 2. The push rod type clutch actuator provided by the present utility model has low cost, high reliability, simple control and is convenient for assembly.

[0017] 3. The push rod type clutch actuator provided by the present utility model has its driving motor electrically connected to the TCU, and can realize automatic precise shifting control. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0019] Explanation of the reference numerals in the drawings:

[0020] 1 - Driving motor, 2 - Bearing, 3 - Worm, 31 - Worm support frame, 4 - Worm gear shaft, 5 - Worm gear, 6 - Crankshaft, 7 - Rocker, 8 - Rocker shaft, 9 - Push rod, 10 - Push rod guide sleeve, 11 - Push rod guide sleeve support frame, 12 - Housing, 13 - Transmission shaft, 14 - Transmission shaft cage. Detailed implementation mode

[0021] The present utility model will be further described below in conjunction with the drawings and specific embodiments.

[0022] A push - rod type clutch actuator, see Figure 1 ;

[0023] It includes a push rod 9, a transmission shaft 13, a housing 12, a driving motor 1 and a transmission shaft cage 14 arranged outside the housing 12, a worm 3, a worm gear shaft 4, a worm gear 5, a crankshaft 6, a rocker 7, and a rocker shaft 8 arranged inside the housing 12; the driving motor 1 is electrically connected to the TCU, and the driving motor 1 is used to control the rotation stroke of the transmission shaft 13.

[0024] One end of the transmission shaft 13 is arranged on the transmission shaft cage 14 through a bearing 2 and is connected to the output end of the driving motor 1, wherein the inner ring of the bearing 2 is connected to the transmission shaft 13, and the outer ring is in interference fit with the transmission shaft cage 14. The other end of the transmission shaft 13 extends into the housing 12; the worm 3 is sleeved on the transmission shaft 13, and the worm gear 5 is arranged on the housing 12 through a worm gear shaft 4 and meshes with the worm 3; one end of the rocker 7 is connected to the side surface of the worm gear 5 through a crankshaft 6;

[0025] The housing 12 is fixed in the transmission assembly. A first through - hole is arranged at one end of the housing 12 close to the clutch. One end of the push rod 9 passes through the first through - hole and extends into the housing 12, and is connected to the other end of the rocker 7 through a rocker shaft 8; the push rod 9 can reciprocate through the first through - hole under the cooperation of the worm gear 5 and the rocker 7; the other end of the push rod 9 is connected to a shift fork for realizing the engagement and separation of the clutch.

[0026] In order to save space, the shape of the housing 12 is wide at one end and narrow at the other end, where the end close to the worm 3 is narrow and the end far from the worm 3 is wide; a protrusion is provided on one side of the housing 12 far from the transmission shaft cage 14 for reserving internal space for the movement of the worm gear 5 and the rocker 7. The worm 3 is fixed in the housing 12 through a worm support frame 31.

[0027] In order to limit the push rod 9, a push rod guide sleeve 10 is arranged on the inner wall of the first through - hole, and the push rod guide sleeve 10 is connected to the inner wall of the housing 12 through a push rod guide sleeve support frame 11.

[0028] As Figure 1As shown in the figure, let the worm wheel shaft 4 be point D, the crankshaft 6 be point C, the rocker shaft 8 be point B, and the other end of the push rod 9 be point A. The working process of the above push rod type clutch actuator includes the clutch separation process and the clutch engagement process, which are specifically as follows:

[0029] Clutch separation process: The drive motor 1 rotates under the control of the TCU, then drives the worm 3, the worm wheel 5 and the worm wheel shaft 4 to rotate together, and then drives the rocker 7 to move through the crankshaft 6, and finally drives the push rod 9 to push forward; at the same time, when points B, C, and D are collinear, the push rod 9 is pushed to the maximum position of the separation stroke, and the clutch can be quickly separated. There is no need to set a limit device during the movement of the crank rocker mechanism, and only the rotation speed of the worm 3 needs to be controlled during the movement to achieve precise control of the quick separation of the clutch.

[0030] Clutch engagement process: Due to the characteristics of the crank rocker mechanism, after the clutch is separated at the maximum displacement of the push rod, there is no need to control the drive motor 1 to reverse to achieve clutch engagement. The drive motor 1 drives the worm 3, the worm 5 and the worm wheel shaft 4 to rotate together, and then drives the rocker 7 to move through the crankshaft 6, and finally drives the push rod 9 to move backward; until points B, C, and D are collinear again; at this time, the clutch is completely engaged. During this process, the rotation phase of the worm 5 needs to be precisely controlled to achieve smooth starting and shifting of the vehicle.

[0031] This embodiment has the characteristics of simple and compact structure, low cost, high reliability, simple control, and easy implementation. At the same time, its performance can also meet the requirements of rapid clutch separation and flexible engagement, can significantly optimize the jitter problem during starting and shifting, and shorten the power interruption time during shifting. Compared with the pneumatic shift actuator, this embodiment is convenient for fine control of the clutch and can effectively improve the shift quality of the AMT transmission.

Claims

1. A push rod type clutch actuator, characterized in that: The invention comprises a push rod (9), a transmission shaft (13), a housing (12), a driving motor (1) and a transmission shaft holder (14) arranged outside the housing (12), a worm (3), a worm gear shaft (4), a worm wheel (5), a crank shaft (6), a rocker (7), and a rocker shaft (8) arranged inside the housing (12); One end of the transmission shaft (13) is arranged on a transmission shaft holder (14) through a bearing (2) and is connected to the output end of the drive motor (1), and the other end of the transmission shaft (13) extends into the housing (12); the worm (3) is sleeved on the transmission shaft (13), and the worm wheel (5) is arranged on the housing (12) through a worm wheel shaft (4) and meshes with the worm (3); one end of the rocker (7) is connected to the side surface of the worm wheel (5) through a crank shaft (6); The housing (12) is fixed in the gearbox assembly. A first through hole is provided at one end of the housing (12) close to the clutch. One end of the push rod (9) extends into the housing (12) through the first through hole and is connected to the other end of the rocker (7) through the rocker shaft (8). The push rod (9) can pass through the first through hole to perform reciprocating motion in cooperation with the worm gear (5) and the rocker (7). The other end of the push rod (9) is connected to a shift fork to achieve engagement and disengagement of the clutch.

2. A push rod type clutch actuator according to claim 1, characterized in that: The drive motor (1) is electrically connected to the TCU, and the drive motor (1) is used to control the rotational travel of the transmission shaft (13).

3. A push rod type clutch actuator according to claim 2, characterized in that: The inner ring of the bearing (2) is connected to the transmission shaft (13), and the outer ring is interference fit with the transmission shaft retainer (14).

4. A push rod type clutch actuator according to claim 3, characterized in that: The worm (3) is fixed in the housing (12) via a worm support frame (31).

5. A push rod type clutch actuator according to claim 4, characterized in that: A push rod guide sleeve (10) is provided on the inner wall of the first through hole, and the push rod guide sleeve (10) is connected to the inner wall of the housing (12) via a push rod guide sleeve support frame (11).

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