Electric gear shifting executing mechanism

Abstract

The utility model provides an electric gear shifting executing mechanism, which relates to the field of gear shifting executing mechanisms, and adopts the technical scheme that the electric gear shifting executing mechanism comprises a driving motor, the driving motor can drive a shifting fork to linearly move, a shifting fork shaft is arranged at the upper end of the shifting fork, and the shifting fork can drive the shifting fork shaft to move. A plurality of locking holes are formed in the outer circumference of the shifting fork shaft, the locking holes are arranged in the axial direction of the shifting fork shaft, the locking holes correspond to corresponding gears, the positioning assembly comprises a shell, the end of the shifting fork shaft is arranged in the shell in an axial moving mode, a spring pin is arranged in the shell, and the spring pin is arranged in the shell. And the spring pin can extend into the locking hole. The utility model has the advantages of simple structure and higher reliability.

Description

Technical Field

[0001] The utility model relates to the field of gear shifting mechanisms, in particular to an electric gear shifting actuator. Background Art

[0002] Mechanical shift actuators often use air pressure or hydraulic pressure to provide power and spring return to achieve gear shifting. Mechanical shift actuators have high noise, high impact force, slow response speed, complex structure, and the gear shift stroke cannot be accurately controlled. During the gear shifting process, the speed difference between the shift actuator and the electric drive axle is large, and they cannot be accurately coordinated.

[0003] In the prior art, a Chinese utility model patent with authorization announcement number CN 217328416 U discloses a gear structure that is convenient for shifting gears, including a housing, a shift shaft and a shift rack are arranged in the housing, a first motor is arranged on the shift shaft, a second motor is arranged on the shift rack, a shift shaft sleeve is arranged on the shift shaft, a shift gear is arranged on the outer surface of one side of the shift shaft sleeve, the shift gear is meshed with the shift rack, a shift groove is arranged on the outer circumferential surface of the other side of the shift shaft sleeve, a positioning pin is fixedly arranged on the housing, and the positioning pin slides relatively in the shift groove. The locating pin is fixedly installed in the housing, and the shift shaft sleeve is installed above the shift shaft. The first motor controls the longitudinal sliding of the shift shaft sleeve, and the shift shaft sleeve drives the shift slot to slide longitudinally, thereby realizing the longitudinal relative sliding and limiting of the shift slot and the locating pin, and realizing the function of gear selection. The second motor controls the lateral movement of the shift rack, and the shift gear is meshed with the shift rack. The movement of the shift rack can drive the shift gear to rotate, and the rotation of the shift gear drives the shift slot to deflect left and right, thereby realizing the lateral rotation and limiting of the shift slot and the locating pin. The shift shaft and the shift rack are controlled by the first motor and the second motor respectively, thereby realizing the function of gear shifting.

[0004] The above technical solution is used to realize the process of electric shifting. However, two motors are provided in this technical solution, which are respectively responsible for the axial movement of the shift shaft to select the gear and the cooperation between the shift groove and the positioning pin to realize the gear selection. The structure is relatively complex, the failure rate is high, and the use and maintenance costs are also high. Utility Model Content

[0005] In order to solve the technical problem that the electric shift actuator in the prior art has a complex structure and a high failure rate, the utility model provides an electric shift actuator with a simple structure and high reliability.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: an electric shift actuator, including a driving motor, the driving motor can drive the fork to move linearly, the upper end of the fork is provided with a fork shaft, the fork can drive the fork shaft to move, a plurality of locking holes are provided on the outer circumference of the fork shaft, the plurality of locking holes are arranged along the axial direction of the fork shaft, the locking holes correspond to the corresponding gear positions, and also includes a positioning assembly, the positioning assembly includes a shell, the end of the fork shaft can be axially movably arranged in the shell, a spring pin is provided in the shell, and the spring pin can extend into the locking hole. Through the cooperation of the spring pin and the axially movable fork shaft, mechanical locking can be achieved, with low failure rate and high reliability, while eliminating the motor required for electric locking, with a simple structure and low cost.

[0007] Furthermore, the spring pin includes a locking pin, a spring is arranged inside the locking pin, and the spring abuts against an adjusting screw plug extending into the housing. The hardness of the spring pin can be adjusted by adjusting the screw plug to ensure the reaction speed of the spring pin during long-term use.

[0008] Furthermore, the end of the locking pin is in a conical structure, which facilitates the locking pin to enter and exit the locking hole.

[0009] Furthermore, a vent hole is provided at the end of the locking pin, and the vent hole is communicated with the inner hole of the locking pin. By providing the vent hole, the air pressure of the locking pin is stabilized when the locking pin moves axially, thereby ensuring the smooth movement of the locking pin.

[0010] Furthermore, two spring pins are symmetrically arranged on the housing, and two rows of locking holes are relatively arranged on the outer circumference of the fork shaft. The two spring pins are relatively arranged to ensure the force acting on the fork shaft and the limiting effect.

[0011] Furthermore, the driving motor is connected to a driving gear, and the driving gear is meshed with a rack on the shift fork.

[0012] Furthermore, a mounting seat is provided on the driving motor.

[0013] Furthermore, the shell includes a sleeve, the end of the fork shaft is arranged inside the sleeve, a connecting plate is provided at the connecting end of the sleeve, two pin barrels are symmetrically arranged on the outer circumference of the sleeve, the axis of the pin barrel is arranged perpendicular to the axis of the sleeve, the locking pin is movably arranged in the pin barrel, and the adjusting screw plug is provided at the end of the pin barrel.

[0014] Furthermore, an inspection hole is provided at one end of the sleeve opposite to the connecting end, the inspection hole is coaxially arranged with the shift fork shaft, and an inspection screw plug is provided on the inspection hole. The inspection hole facilitates the inspection of the shift fork shaft, reducing the disassembly and assembly of other components.

[0015] Furthermore, the shift fork is provided with a mounting sleeve, the shift fork shaft is arranged in the mounting sleeve, and the mounting sleeve is detachably provided with a locking bolt, the locking bolt can extend into the mounting sleeve and be connected to the shift fork shaft. By using the locking bolt, the shift fork and the shift fork shaft can be detachably connected, so that the two can be maintained independently.

[0016] It can be seen from the above technical solutions that the utility model has the following advantages:

[0017] The utility model provides an electric shift actuator, which can realize mechanical locking through the cooperation of a spring pin and an axially movable shift fork shaft, has low failure rate and high reliability, and at the same time saves the motor required for electric locking, has simple structure and low cost; the hardness of the spring pin can be adjusted by adjusting the screw plug, so as to ensure the reaction speed of the spring pin during long-term use; the air pressure of the locking pin is stabilized when the axial movement of the locking pin is arranged by arranging the vent hole, so as to ensure the smooth movement of the locking pin; the force applied to the shift fork shaft is ensured by relatively arranging two spring pins, so as to ensure the limiting effect; the shift fork shaft can be easily inspected and repaired through the inspection hole, so as to reduce the disassembly and assembly of other components; the shift fork and the shift fork shaft can be detachably connected by using the locking bolt, so as to facilitate the independent maintenance of the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the assembly structure of a specific implementation mode of the utility model and a gear.

[0020] Figure 2 It is a schematic diagram of the assembly structure of the positioning assembly and the fork shaft in a specific implementation manner of the utility model.

[0021] In the figure, 1. driving motor; 2. driving gear; 3. shift fork; 4. housing; 401. inspection hole; 402. inspection screw plug; 403. pin barrel; 404. adjusting screw plug; 405. spring; 406. locking pin; 4062. vent hole; 407. connecting plate; 5. shift fork shaft; 501. locking hole. DETAILED DESCRIPTION

[0022] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0023] like Figure 1 and Figure 2 As shown, this specific embodiment provides an electric shift actuator, including a drive motor 1, a shift fork 3, a shift fork shaft 5 and a positioning assembly; the drive motor 1 can drive the shift fork 3 to move linearly, specifically, the drive motor 1 is connected to a drive gear 2, the drive gear 2 is meshed with a rack on the shift fork 3, a shift fork shaft 5 is arranged at the upper end of the shift fork 3, the shift fork 3 can drive the shift fork shaft 5 to move, a plurality of locking holes 501 are arranged on the outer circumference of the shift fork shaft 5, the plurality of locking holes 501 are arranged along the axial direction of the shift fork shaft 5, and the locking holes 501 correspond to corresponding gear positions, the positioning assembly includes a housing 4, the end of the shift fork shaft 5 can be axially movably arranged in the housing 4, a spring 405 pin is arranged in the housing 4, and the spring 405 pin can extend into the locking hole 501. Through the cooperation of the spring 405 pin and the axially movable shift fork shaft 5, mechanical locking can be achieved, with low failure rate and high reliability, while eliminating the motor required for electric locking, with a simple structure and low cost.

[0024] In this specific embodiment, the spring 405 pin can adopt the following specific structure: the spring 405 pin includes a locking pin 406, a spring 405 is arranged inside the locking pin 406, the spring 405 abuts against the adjusting screw 404 extending into the shell 4, and the hardness of the spring 405 pin can be adjusted by adjusting the screw 404 to ensure the reaction speed of the spring 405 pin during long-term use; the end of the locking pin 406 is a conical structure, and by setting the end of the locking pin 406 to a conical structure, it plays a guiding role and facilitates entry and exit of the locking hole 501; the end of the locking pin 406 is provided with a vent hole 4062, and the vent hole 4062 is connected to the inner hole of the locking pin 406. By setting the vent hole 4062, the air pressure of the locking pin 406 is stabilized when the locking pin 406 moves axially, thereby ensuring the smooth movement of the locking pin 406.

[0025] In this specific embodiment, in order to ensure reliable force acting on the fork shaft 5 , two spring pins 405 are symmetrically arranged on the housing 4 , and two rows of locking holes 501 are oppositely arranged on the outer circumference of the fork shaft 5 .

[0026] In this specific embodiment, the shell 4 can adopt the following specific structure: the shell 4 includes a sleeve, the end of the fork shaft 5 is axially movably arranged inside the sleeve, the diameter of the fork shaft 5 is smaller than the inner diameter of the sleeve, and two pin barrels 403 are symmetrically arranged on the outer circumference of the sleeve, the axis of the pin barrel 403 is perpendicular to the axis of the sleeve, a locking pin 406 is movably arranged in the pin barrel 403, and an adjusting screw plug 404 is arranged at the end of the pin barrel 403; at the same time, an inspection hole 401 is arranged at the end of the sleeve opposite to the connecting end, the inspection hole 401 is coaxially arranged with the fork shaft 5, and an inspection screw plug 402 is arranged on the inspection hole 401, so that the fork shaft 5 can be easily inspected through the inspection hole 401, reducing the disassembly and assembly of other components.

[0027] The shift fork 3 and the shift fork shaft 5 can be cast into an integrated structure or welded together. In this specific embodiment, in order to achieve independent maintenance and replacement of the two, a mounting sleeve is provided on the shift fork 3, and the shift fork shaft 5 is arranged in the mounting sleeve. A locking bolt is detachably provided on the mounting sleeve, and the locking bolt can extend into the interior of the mounting sleeve and be connected to the shift fork shaft 5.

[0028] In this specific embodiment, the locking hole 501 is provided with three corresponding to the resistance, middle gear and high gear respectively; in order to facilitate the installation of the actuator, a mounting seat is provided on the drive motor 1, and a connecting plate 407 is provided at the connecting end of the sleeve. The mounting seat and the connecting plate 407 are respectively connected to the gearbox housing of the drive axle by bolts.

[0029] The working process of this electric shift actuator is:

[0030] When the drive motor 1 receives the gear shifting command, the drive motor 1 rotates the corresponding angle according to the relationship between the corresponding gear position and the rotational angular displacement of the drive motor 1, so that the shift fork 3 drives the shift fork shaft 5 to move axially, and the locking pin 406 moves out of the locking hole 501 under the action of the shift fork shaft 5 and is no longer limited. The shift fork shaft 5 can achieve axial free movement to select gears; when the end of the shift fork shaft 5 moves to the set position, the locking pin 406 pops out and extends into the locking hole 501 under the action of the spring 405, performs positioning, and avoids axial movement of the shift fork shaft 5, completing the gear shifting.

[0031] From the above specific implementations, it can be seen that the utility model has the following beneficial effects:

[0032] 1. Through the cooperation of the spring 405 pin and the axially movable fork shaft 5, mechanical locking can be achieved, with low failure rate and high reliability. At the same time, the motor required for electric locking is omitted, the structure is simple and the cost is low;

[0033] 2. The hardness of the spring 405 pin can be adjusted by adjusting the screw plug 404 to ensure the response speed of the spring 405 pin during long-term use;

[0034] 3. By providing the vent hole 4062, the air pressure of the locking pin 406 is stabilized when the locking pin 406 moves axially, thereby ensuring smooth movement of the locking pin 406;

[0035] 4. The force acting on the fork shaft 5 is ensured by relatively arranging two spring 405 pins to ensure the limiting effect;

[0036] 5. The fork shaft 5 can be easily inspected through the inspection hole 401, which reduces the need to disassemble and assemble other components;

[0037] 6. By using a locking bolt, the shift fork 3 and the shift fork shaft 5 can be detachably connected, so that the two can be maintained independently.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electric shift actuator, comprising a drive motor (1), the drive motor (1) being capable of driving a shift fork (3) to move linearly, a shift fork shaft (5) being arranged at the upper end of the shift fork (3), characterized in that: The shift fork (3) can drive the shift fork shaft (5) to move, and a plurality of locking holes (501) are arranged on the outer circumference of the shift fork shaft (5). The plurality of locking holes (501) are arranged along the axial direction of the shift fork shaft (5), and the locking holes (501) correspond to corresponding gear positions. The shift fork shaft (3) also includes a positioning assembly, and the positioning assembly includes a housing (4). The end of the shift fork shaft (5) is axially movably arranged in the housing (4), and a spring (405) pin is arranged in the housing (4), and the spring (405) pin can extend into the locking hole (501).

2. The electric shift actuator according to claim 1, characterized in that: The spring (405) pin comprises a locking pin (406), a spring (405) is arranged inside the locking pin (406), and the spring (405) abuts against an adjusting screw plug (404) extending into the housing (4).

3. The electric shift actuator according to claim 2, characterized in that: The end of the locking pin (406) is in a conical structure.

4. The electric shift actuator according to claim 3, characterized in that: A vent hole (4062) is provided at the end of the locking pin (406), and the vent hole (4062) is communicated with the inner hole of the locking pin (406).

5. The electric shift actuator according to claim 4, characterized in that: Two spring (405) pins are symmetrically arranged on the housing (4), and two rows of locking holes (501) are oppositely arranged on the outer circumference of the fork shaft (5).

6. The electric shift actuator according to any one of claims 2 to 5, characterized in that: The driving motor (1) is connected to a driving gear (2), and the driving gear (2) is meshed with a rack on a shift fork (3).

7. The electric shift actuator according to claim 6, characterized in that: A mounting seat is arranged on the driving motor (1).

8. The electric shift actuator according to claim 7, characterized in that: The housing (4) comprises a sleeve, the end of the shift fork shaft (5) is arranged inside the sleeve, a connecting plate (407) is arranged at the connecting end of the sleeve, two pin barrels (403) are symmetrically arranged on the outer circumference of the sleeve, the axis of the pin barrel (403) is arranged perpendicular to the axis of the sleeve, a locking pin (406) is movably arranged in the pin barrel (403), and an adjusting screw plug (404) is arranged at the end of the pin barrel (403).

9. The electric shift actuator according to claim 8, characterized in that: An inspection hole (401) is provided at one end of the sleeve opposite to the connection end. The inspection hole (401) is coaxially arranged with the shift fork shaft (5), and an inspection screw plug (402) is provided on the inspection hole (401).

10. The electric shift actuator according to claim 1, characterized in that: The shift fork (3) is provided with a mounting sleeve, the shift fork shaft (5) is arranged in the mounting sleeve, and the mounting sleeve is detachably provided with a locking bolt, which can extend into the mounting sleeve and be connected to the shift fork shaft (5).

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