阅读说明：本技术 一种amt选换挡执行器的间隙调整方法 (Clearance adjustment method for AMT gear selecting and shifting actuator ) 是由 刘全春 刘鹏 徐德龙 张建国 朱明峰 王加雪 于 2021-09-28 设计创作，主要内容包括：本发明适用于变速器技术领域,提供了一种AMT选换挡执行器的间隙调整方法,其中AMT选换挡执行器包括壳体和电机；电机的输出轴通过联轴器传动连接丝杆,丝杆上螺接密封堵块,密封堵块位于壳体内的凹孔中,密封堵块与联轴器之间还安装有弹性挡圈,密封堵块的外周面设有外螺纹,凹孔内设有与外螺纹适配的内螺纹；旋转丝杆使密封堵块沿丝杆轴向方向移动,在密封堵块与联轴器之间调整出用于安装弹性挡圈及其它限位组件的轴向间隙,限位组件用于锁紧密封堵块在丝杆上的位置；安装使弹性挡圈及其它限位组件；本间隙调整方法减少了装配过程的工作量,使装配过程中可以使用统一规格的弹性挡圈进行装配,降低了安装成本。(The invention is suitable for the technical field of transmissions and provides a clearance adjustment method for an AMT gear selecting and shifting actuator, wherein the AMT gear selecting and shifting actuator comprises a shell and a motor; an output shaft of the motor is in transmission connection with a lead screw through a coupler, a sealing block is in threaded connection with the lead screw and is positioned in a concave hole in the shell, an elastic retainer ring is further arranged between the sealing block and the coupler, external threads are arranged on the peripheral surface of the sealing block, and internal threads matched with the external threads are arranged in the concave hole; rotating the screw rod to enable the sealing and plugging block to move along the axial direction of the screw rod, adjusting an axial clearance for installing an elastic check ring and other limiting assemblies between the sealing and plugging block and the coupler, wherein the limiting assemblies are used for locking the position of the sealing and plugging block on the screw rod; installing an elastic check ring and other limiting components; the clearance adjusting method reduces the workload of the assembling process, so that the elastic check rings with uniform specifications can be used for assembling in the assembling process, and the installation cost is reduced.)

1. A clearance adjustment method of an AMT gear selecting and shifting actuator is characterized in that the AMT gear selecting and shifting actuator comprises a shell (6) and a motor (1);

an output shaft of the motor (1) is in transmission connection with a screw rod (3) through a coupler (2), a sealing block (8) is in threaded connection with the screw rod (3) and is located in a concave hole in a shell, the sealing block is annular, external threads (15) are arranged on the peripheral surface of the sealing block hole, and internal threads (16) matched with the external threads (15) are arranged in the concave hole;

the method comprises the following steps:

the screw rod (3) is rotated to enable the sealing and plugging block (8) to move along the axial direction of the screw rod (3), an axial clearance for installing an elastic check ring (7) and other limiting components is adjusted between the sealing and plugging block (8) and the coupler (2), and the sealing and plugging block (8) is always locked with the shell (6) in the moving process through threaded fit;

the limiting assembly is used for locking the position of the tight plugging block (8) on the screw rod (3);

and installing a circlip (7).

2. The method for adjusting the clearance of the AMT gear selecting and shifting actuator according to claim 1, wherein the sealing block (8) is provided with a sealing groove along the circumferential direction;

the method further comprises the steps of:

before the sealing block is screwed on the screw rod, a sealing ring (12) is sleeved in the sealing groove.

3. The method for adjusting the clearance of the AMT gear selecting and shifting actuator according to claim 1, wherein the limit component is detachably mounted on the screw rod (3).

4. The method of claim 1, wherein the limiting assembly comprises a clamping block;

the method further comprises the steps of:

a clamping block is arranged between the sealing and blocking block (8) and the shell (6) to clamp the sealing and blocking block (8) and the shell (6).

5. The method for adjusting the clearance of the AMT gear selecting and shifting actuator according to claim 4, wherein the clamping block is a locking key (9), the sealing block (8) is provided with a key groove (18) matched with the locking key (9), and a groove (14) corresponding to the key groove (18) is arranged in the shell and close to the key groove (18);

the method further comprises the steps of:

and the locking key (9) is inserted into the key groove (18) and the groove (14) to enable the sealing and blocking block (8) to be clamped with the shell (6).

6. The method of claim 5 wherein said limit stop assembly includes an annular extrusion;

the method further comprises the steps of:

and a pressing part is sleeved on the periphery of the sealing and blocking block (8), so that the pressing part presses the locking key (9) towards the groove (14), and the locking key (9) is fixed in the key groove (18).

7. The method of adjusting the lash of an AMT shift actuator according to claim 6 wherein the pressing portion is a lock ring (10) and the lock ring (10) is provided with at least one positioning groove (19) inside.

8. The method of claim 7 wherein said step of adjusting the lash of said AMT shift actuator is further defined by;

install at lock ring (10) and be close to shaft coupling (2) one side and prevent that lock ring from towards gliding circlip (7) of shaft coupling direction, be equipped with in the casing with circlip thickness adaptation's ring groove (17), circlip (7) joint is in ring groove (17).

9. The method for adjusting the clearance of the AMT gear selecting and shifting actuator according to claim 1, wherein two ends of the screw rod (3) are respectively installed in the shell (6) through a first thrust bearing (4) and a second thrust bearing (5); the first thrust bearing (4) is positioned at one end, close to the motor (1), of the screw rod, and the second thrust bearing (5) is positioned at one end, far away from the motor (1), of the screw rod and is provided with a shaft sleeve; and a screw rod nut (13) is further installed on the screw rod (3), and the screw rod nut (13) is positioned between the first thrust bearing (4) and the second thrust bearing (5).

Technical Field

The invention relates to the technical field of transmissions, in particular to a clearance adjustment method of an AMT gear selecting and shifting actuator.

Background

An electric control mechanical automatic transmission (namely AMT) is upgraded on a traditional manual transmission, so that high fuel economy and low emission are realized, and the advantages of high efficiency, high reliability, low cost, simple structure and the like of the manual transmission are inherited. The gear selecting and shifting mechanism in the electric control mechanical automatic transmission is driven by adopting a full motor drive mode, a pneumatic drive mechanism, a hydraulic drive mechanism, an electro-hydraulic drive mechanism and the like.

The full-motor-driven transmission adopts a motor as a driving part to perform gear selection action, a motor output shaft is connected with a lead screw in a driving mode through a coupler, a lead screw nut is connected onto the lead screw in a screwing mode, the motor drives the lead screw to rotate so as to drive the lead screw nut on the lead screw to move in the axial direction of the lead screw, and the lead screw nut on the lead screw is used as a secondary driving part to drive a gear selection shaft to perform next-step action.

As shown in fig. 1, a shaft coupling, an elastic retainer ring, an oil seal, a sealing block and a thrust bearing are axially arranged on a screw rod in sequence from the direction of a motor; the elastic retainer ring is used as a boundary, the driving mechanism for driving the screw rod to rotate, such as the motor, the coupler and the like, is arranged on the right side of the elastic retainer ring, a sealing mechanism (comprising an oil seal and a sealing block) for preventing oil in the gearbox from entering the motor is arranged between the elastic retainer ring and the thrust bearing, and the elastic retainer ring limits the sealing mechanism. Wherein the shaft coupling, the elastic retainer ring, the oil seal and the sealing block are all clamped in the gearbox shell.

As can be seen from fig. 1, the assembly space of the circlip is determined by the gap between the housing and the sealing block, but the gap is different in size due to different assembly conditions in the actual assembly process. And the elastic check rings with different thicknesses are selected to be clamped into the gaps according to the actual gap between the sealing and plugging block and the coupler, so that the normal work of the mechanism is ensured. In the process of assembling, manual adjustment is needed, trial assembly is carried out one by one, and finally the required specification of the elastic retainer ring is determined. Therefore, it is cumbersome and limits mass production of all-motor driven transmissions.

Disclosure of Invention

The invention provides a clearance adjusting method of an AMT gear selecting and shifting actuator, and aims to solve the problem that a plurality of elastic check rings need to be trial-installed in the assembling process of the existing full-motor drive type transmission, so that the actually-assembled elastic check rings can be matched with the actually-assembled clearance.

In order to realize the purpose, the invention adopts the following technical scheme to realize the purpose:

a clearance adjustment method for an AMT gear selecting and shifting actuator comprises a shell and a motor, wherein a coupling, a screw rod and a sealing block are arranged in the shell;

an output shaft of the motor is connected with a lead screw through a coupler in a transmission manner, a sealing block is screwed on the lead screw and is positioned in a concave hole in the shell, the sealing block is circular, the concave hole is a round hole, external threads are arranged on the peripheral surface of the sealing block, and internal threads matched with the external threads are arranged in the concave hole;

the screw rod is rotated to enable the sealing and plugging block to move along the axial direction of the screw rod, an axial clearance for installing an elastic check ring and other limiting assemblies is adjusted between the sealing and plugging block and the coupler, the limiting assemblies are used for locking the position of the sealing and plugging block on the screw rod, and the sealing and plugging block is always locked with the shell in the moving process through threaded fit;

installing the elastic check ring and other limiting components.

The sealing block is always locked with the shell in the gap adjusting process; therefore, the situation that elastic check rings with different thicknesses need to be repeatedly trial-assembled to adapt to the gap between the sealing block and the coupler is avoided, the assembly workload is reduced, and on the other hand, the elastic check rings with uniform specifications can be used for assembly during assembly, so that the batch production of the all-motor drive type transmission is facilitated; in addition, because the sealing block is connected with the shell and the screw rod through threads, the sealing block can be self-locked in the axial direction of the screw rod in the connection mode, and even if the elastic retainer ring which is not installed or installed is damaged, the situation that parts shake due to the fact that the sealing block moves can be avoided under most conditions.

Further, a sealing groove is formed in the sealing block along the circumferential direction of the sealing block;

before the sealing block is screwed on the screw rod, a sealing ring is sleeved in the sealing groove.

Furthermore, the limiting assembly is used for locking the position of the sealing block on the screw rod, and the limiting assembly is detachably arranged on the screw rod; the spacing subassembly further locks closely the shutoff piece on the basis of sealed shutoff piece auto-lock, prevents to lead the removal of closely the shutoff piece because of the screw thread slides, guarantees that the clearance between the part does not change.

Furthermore, the limiting assembly comprises a clamping block;

a clamping block is arranged between the sealing and plugging block and the shell, so that the sealing and plugging block is clamped with the shell, and the sealing and plugging block can not move along the axial direction of the screw rod any more; the clamping block can be connected with the sealing block and the shell in a detachable mode such as threaded connection, buckle connection and the like.

Furthermore, the fixture block is a locking key, a key groove matched with the locking key is formed in the sealing block, and a groove corresponding to the key groove is formed in the position, close to the key groove, in the shell; the locking key is used for locking, so that on one hand, the movement of the sealing and blocking block is limited, and on the other hand, the assembly and the disassembly are convenient.

Further, the limiting assembly comprises an annular extrusion part;

an extrusion part is sleeved on the periphery of the sealing block, so that the extrusion part extrudes the locking key towards the groove direction, and the locking key is fixed in the key groove; the pressing part is used as a secondary fastener for locking the locking key (the locking key is used as a primary fastener for locking the tight plugging block) and preventing the locking key from being out of the groove.

Furthermore, the extrusion portion is a locking ring, at least one positioning groove is formed in the inner side of the locking ring corresponding to the position of the locking key, and after the key groove is aligned with the positioning groove, the locking key is inserted into an insertion hole formed by aligning the key groove with the positioning groove, so that the sealing block and the locking ring can be locked in the circumferential direction.

Furthermore, an elastic retainer ring is arranged on one side, close to the coupler, of the locking ring, so that the locking ring is clamped in the shell, and the limiting ring is prevented from sliding towards the coupler; the elastic check ring is abutted against the shell, an annular clamping groove matched with the thickness of the elastic check ring is arranged at a position corresponding to the contact position of the shell and the elastic check ring, and the elastic check ring is positioned in the annular clamping groove; the circlip serves as a secondary fastener for limiting the axial displacement of the locking ring (the locking key serves as a primary fastener for locking the block, and the locking ring serves as a secondary fastener for preventing the locking key from disengaging from the groove).

Furthermore, two ends of the screw rod are respectively arranged in the shell through a first thrust bearing and a second thrust bearing; the first thrust bearing is arranged at one end, close to the motor, of the screw rod, and the second thrust bearing is arranged at one end, far away from the motor, of the screw rod and is provided with a shaft sleeve; a screw rod nut is further mounted on the screw rod and is positioned between the first thrust bearing and the second thrust bearing; the first thrust bearing and the second thrust bearing fix the position of the screw rod in the shell, bear the radial load of the screw rod and limit the movement stroke of the screw rod nut along the axial direction of the screw rod.

The invention has the beneficial effects that:

1. the method for assembling the full-motor driven transmission enables the assembly to be more flexible, and elastic check rings with various specifications do not need to be assembled according to different fixed assembly gaps, so that the workload in the assembly process is reduced, the installation cost is reduced, and the batch production of the full-motor driven transmission is facilitated;

the sealing and plugging block can be moved along the axial direction of the screw rod by rotating the sealing and plugging block until a proper axial gap is adjusted between the sealing and plugging block and the coupler so as to install a limiting assembly for limiting, and the sealing and plugging block is always locked with the shell in the process; therefore, the situation that the elastic check rings with different thicknesses need to be repeatedly trial-installed to adapt to the gap between the sealing and blocking block and the coupler is avoided, and the assembling workload is reduced; on the other hand, the elastic check rings with uniform specifications can be used for assembly in the assembly process, so that the installation cost is reduced, and the batch production of the all-motor drive type transmission is facilitated; in addition, because the sealing block is connected with the shell and the screw rod through threads, the sealing block can be self-locked in the axial direction of the screw rod in the connection mode, and even if parts which are not installed or are used for limiting the axial movement of the sealing block to be damaged are damaged, the situation that parts are shaken due to the movement of the sealing block can be avoided under most conditions.

2. In the method, the sealing and plugging block is limited by arranging the detachable limiting component, so that the movement of the sealing and plugging block is prevented due to the sliding of threads, and the gap between parts is ensured not to change; a key groove matched with the locking key is formed in the sealing block, the locking key penetrates through the shell and is embedded into the key groove, a locking ring is sleeved on the periphery of the sealing block, the locking key is further embedded into a positioning groove in the locking ring, and the locking key is clamped with the elastic retainer ring in a direction close to the coupler in the circumferential direction; the locking key serves as a primary fastener locking and sealing block, the locking ring serves as a secondary fastener to prevent the locking key from disengaging from the groove, and the elastic retainer ring serves as a fastener of the second level and is used for limiting axial displacement of the locking ring.

3. The sealing plug outer peripheral face is equipped with the keyway that matches with a plurality of locking keys, and the advantage that sets up like this lies in: when rotating sealed stifled piece to the end, but discover not have keyway and slot to align, can be backward little rotatory sealed stifled piece to minimum volume of circling round makes the keyway of a nearest department apart from the slot align with the slot, consequently sets up the volume of circling round that a plurality of keyways need the fine setting when following sealed stifled piece outer peripheral face and is favorable to reducing the assembly, improves the assembly precision.

4. After one of the key grooves is aligned with the groove, the locking key is pushed in, so that the locking key is simultaneously embedded into the key groove on the sealing block and the groove on the shell; then, the positioning groove on the locking ring is aligned to the locking key, and then the locking ring is pushed in, so that the locking ring is clamped with the tight plugging block. Thus, the locking key is embedded into the key groove, the groove and the positioning groove at the same time; therefore, the locking key is clamped to the sealing block and the locking ring at the same time, the sealing block and the locking ring are prevented from rotating along the circumferential direction of the sealing block and the locking ring, the connection tightness is improved, and the stability of the device is improved.

In conclusion, the device reduces the workload in the assembly process, so that the elastic check rings with uniform specifications can be used for assembly in the assembly process, and the installation cost is reduced; and set up multistage fastener on this basis and carry on spacingly to sealed shutoff piece, prevent to lead the removal of tight shutoff piece because of the screw thread slides.

Drawings

FIG. 1 is a schematic diagram of a prior art structure in the background art;

FIG. 2 is a schematic structural diagram of a clearance adjustment mechanism of an AMT gear selecting and shifting actuator;

FIG. 3 is an enlarged fragmentary view of a portion of the sealing plug;

FIG. 4 is an enlarged view of a portion of the seal block with the stop assembly removed;

FIG. 5 is an assembled view of the gap adjustment mechanism;

FIG. 6 is a schematic view of the sealing block partially installed without the locking key;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

fig. 8 is a schematic cross-sectional view of a seal block aligned with a locking ring slot, but without a locking key inserted.

In the figure: 1. a motor; 2. a coupling; 3. a screw rod; 4. a first thrust bearing; 5. a second thrust bearing; 6. a housing; 7. a circlip; 8. sealing the plugging block; 9. a locking key; 10. a locking ring; 11. oil sealing; 12. a seal ring; 13. a feed screw nut; 14. grooves, 15, external threads; 16. an internal thread; 17. an annular neck; 18. a keyway; 19. and (6) positioning a groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.

A clearance adjustment method for an AMT gear selecting and shifting actuator is shown in figures 2-6, wherein the AMT gear selecting and shifting actuator comprises a shell 6 and a motor 1, and a coupler 2, a screw rod 3 and a sealing block 8 are arranged in the shell 6;

an output shaft of the motor 1 is in transmission connection with a screw rod 3 through a coupler 2, a sealing block 8 is in threaded connection with the screw rod 3, the sealing block 8 is located in a concave hole in a shell 6, the sealing block 8 is annular, the concave hole is a round hole, an external thread 15 is arranged on the outer peripheral surface of the sealing block, and an internal thread 16 matched with the external thread 15 is arranged in the concave hole;

the screw rod 3 is rotated to enable the sealing block to move along the axial direction of the screw rod 3, an axial clearance for installing an elastic check ring 7 and other limiting assemblies is adjusted between the sealing block and the coupler 2, the limiting assemblies are used for locking the position of the sealing block on the screw rod, and the sealing block 8 is always locked with the shell 6 in the moving process through threaded fit;

the elastic check ring 7 and other limiting components are installed.

The sealing block is always locked with the shell 6 in the process of adjusting the clearance; therefore, the situation that the elastic check rings 7 with different thicknesses need to be repeatedly trial-assembled to adapt to the gaps between the sealing blocks and the coupler 2 is avoided, the assembly workload is reduced, and on the other hand, the elastic check rings 7 with uniform specifications can be used for assembly during assembly, so that the batch production of the driving type transmission of the full motor 1 is facilitated; in addition, because the sealing block is connected with the shell 6 and the screw rod through threads, the sealing block can be self-locked in the axial direction of the screw rod in the connection mode, and even if the elastic retainer ring which is not installed or installed is damaged, the situation that parts shake due to the movement of the sealing block can be avoided under most conditions.

Further, a sealing groove is formed in the sealing block along the circumferential direction of the sealing block;

before the sealing block is screwed on the screw rod, a sealing ring 12 is sleeved in the sealing groove.

Furthermore, the limiting assembly is used for locking the position of the sealing block on the screw rod, and the limiting assembly is detachably arranged on the screw rod; the spacing subassembly further locks closely the shutoff piece on the basis of sealed shutoff piece auto-lock, prevents to lead the removal of closely the shutoff piece because of the screw thread slides, guarantees that the clearance between the part does not change.

Furthermore, the limiting assembly comprises a clamping block;

a clamping block is arranged between the sealing and plugging block and the shell, so that the sealing and plugging block is clamped with the shell, and the sealing and plugging block can not move along the axial direction of the screw rod any more; the clamping block can be connected with the sealing block and the shell in a detachable mode such as threaded connection, buckle connection and the like.

Furthermore, the fixture block is a locking key 9, and a key groove 18 matched with the locking key 9 is arranged on the sealing and blocking block; the keyways 18 in this embodiment have a total of 10, the 10 keyways being equally circumferentially spaced around the seal block; a groove 14 corresponding to the key slot 18 is arranged in the shell and close to the key slot 18; the groove 14 is one in the present embodiment; when the sealing block is assembled, the sealing block is rotated forwards to the bottom, and at the moment, if the key slot 18 and the groove 14 are not in the same straight line, the sealing block is rotated backwards, so that the key slot 18 at the position closest to the groove 14 and the groove 14 are in the same straight line by the minimum rotation amount; the locking key 9 is used for locking, so that on one hand, the movement of the sealing and blocking block is limited, and on the other hand, the assembly and the disassembly are convenient.

Further, the limiting assembly comprises an annular extrusion part;

sleeving an extrusion part on the periphery of the sealing block, so that the extrusion part extrudes the locking key 9 towards the direction of the groove 14, and further, the locking key 9 is fixed in the key groove 18; the pressing part is used as a secondary fastener for locking the locking key (the locking key is used as a primary fastener for locking the tight plugging block) and preventing the locking key from being out of the groove.

Further, the pressing part is a locking ring 10, at least one positioning groove 19 is arranged on the inner side of the locking ring 10 corresponding to the position of the locking key, and the locking key is further embedded into the positioning groove 19.

Further, referring to fig. 3, an elastic retainer ring is installed on one side of the lock ring 10 close to the coupler 2, so that the lock ring 10 is clamped in the housing to prevent the limiting ring from sliding towards the coupler; the elastic check ring is abutted against the shell, an annular clamping groove 17 matched with the thickness of the elastic check ring is arranged at the position, corresponding to the contact position of the shell and the elastic check ring, and the elastic check ring is positioned in the annular clamping groove 17; the circlip acts as a secondary fastener to limit the axial displacement of the locking ring 10 (the locking key acts as a primary fastener to lock the block and the locking ring acts as a secondary fastener to prevent the locking key from disengaging the groove).

Furthermore, two ends of the screw rod are respectively arranged in the shell through a first thrust bearing 4 and a second thrust bearing 5; the first thrust bearing 4 is arranged close to the motor 1, and the second thrust bearing 5 is provided with a shaft sleeve in the direction far away from the screw shaft of the motor 1; a screw rod nut 13 is further arranged on the screw rod, and the screw rod nut 13 is positioned between the first thrust bearing 4 and the second thrust bearing 5; the first thrust bearing and the second thrust bearing fix the position of the screw rod in the shell, bear the radial load of the screw rod and limit the movement stroke of the screw rod nut 13 along the axial direction of the screw rod.

The clearance adjusting method provided by the invention comprises the following steps:

referring to fig. 5, the sealing block 8 can be moved along the axial direction of the screw rod 3 by rotating it, and after the sealing block is rotated forward to the bottom, if the key slot 18 and the groove 14 are not in the same line, the sealing block can be rotated backward, so that the key slot 18 closest to the groove 14 and the groove 14 are in the same line with the minimum rotation amount; until a proper axial clearance is adjusted between the sealing and plugging block 8 and the coupling 2, the sealing and plugging block 8 is always locked with the shell 6 in the process;

embedding the locking key 9 into the key groove on the sealing block 8 along the groove 14 to clamp the sealing block 8 and the shell 6;

aligning the positioning groove 19 on the locking ring 10 with the locking key 9, and then pushing in to enable the locking key 9 to be embedded into the positioning groove so as to prevent the locking key 9 from being out of the groove;

locking key 9 is close to 2 direction installation circlips 7 of shaft coupling, and circlips 7 joint is in casing 6, and circlips 7 are used for restricting locking ring 10 axial displacement.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.