CN117664556A - Automatic transmission gear shifting executing mechanism test device and test method - Google Patents
Automatic transmission gear shifting executing mechanism test device and test method Download PDFInfo
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- CN117664556A CN117664556A CN202311531504.1A CN202311531504A CN117664556A CN 117664556 A CN117664556 A CN 117664556A CN 202311531504 A CN202311531504 A CN 202311531504A CN 117664556 A CN117664556 A CN 117664556A
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Abstract
The invention discloses a testing device and a testing method for a gear shifting executing mechanism of an automatic transmission, wherein the testing device comprises the following components: gear shifting motor, gear set, transmission shaft, space cam, cam groove, compression spring group, constant force spring, synchronous baffle, slider, shift fork, worm gear box etc.. According to the invention, the complex gear shifting resistance load is replaced equivalently through devices such as the compression spring, and the accurate simulation of gear shifting resistance load change is realized. The invention also provides a control method of the test device, which comprises the steps of designing a resistance superposition model applied to the shifting fork, detecting the displacement of the synchronous baffle by the pressure tester and feeding back to the gear shifting motor control module so as to achieve staged control simulation and realize effective control of the gear shifting actuating mechanism device of the automatic transmission. The automatic transmission gear shifting executing mechanism testing device is a detachable testing device and has the advantages of convenience in installation, low cost and convenience in testing.
Description
Technical Field
The invention relates to the field of gear shifting execution mechanisms of automatic transmissions of automobiles, in particular to a test device and a test method for a gear shifting execution mechanism of an automatic transmission.
Background
The electric drive gear shifting actuating mechanism is a key component in an automobile transmission system, the stability performance of the electric drive gear shifting actuating mechanism affects the safety of a vehicle driver, and the electric drive gear shifting actuating mechanism is also an important performance index for evaluating a vehicle. The shifting force is also important as one of indexes for evaluating the performance of the automatic transmission. The development of simulation tests for the gear shifting process is an important link of design and development, and the key point is how to realize accurate simulation of different gear shifting resistance loads. The conventional constant resistance test system cannot realize variable load simulation, comprehensively considers factors such as cost, test convenience and the like, and the test system using the multi-spring combination is invented, can realize accurate simulation of the load in the gear shifting process, and has the advantages of low cost, simple manufacture, simple operation and good engineering application prospect.
Disclosure of Invention
In order to achieve the above object, the present invention adopts the following technical scheme:
an automatic transmission gear shifting executing mechanism test device and a test method are characterized in that the device comprises: the gear shifting device comprises a gear shifting motor, a gear set, a transmission shaft, a space cam, a cam groove, a shifting fork and a worm gear box; the gear shifting motor is directly connected with an upper gear of the gear set after being decelerated by a motor shaft through a worm gear box, one end of the transmission shaft is directly connected with a lower gear of the gear set, the other end of the transmission shaft is fixedly connected with the space cam, and the shifting fork is embedded into a cam groove on the space cam through a connecting rod and moves along with the groove track.
The sliding rail is fixed on the bottom plate, and a spring baffle A and a spring baffle B are respectively arranged on two sides of the sliding rail; the constant force spring is fixed on the spring baffle B through a constant force spring support, and the compression spring group and the magnetic force spring are fixed on the spring baffle A through a compression spring support; the sliding block is matched with the sliding rail and slides on the rail; the synchronous baffle is arranged on the sliding block, one side of the synchronous baffle is provided with a pressure sensor, and the other side of the synchronous baffle is provided with a boss matched with the compression spring group; the pressure sensor is connected with the pressure tester through a signal wire, and the pressure tester is fixed on the mounting baffle.
Further, the pressure sensor is a sensor with high precision and quick response.
Further, the gear shifting motor is a high-power high-torque small-volume motor.
Further, the gear shifting motor is fixedly arranged on a motor support, the transmission shaft is fixedly arranged on a cam mechanism support, and the motor support, the cam mechanism support and the bottom plate are distributed in a step decreasing manner in space; the upper gear and the lower gear of the gear set are matched with each other, and the gear shifting motor and the transmission shaft are distributed at an angle of 90 degrees.
Further, the sliding rail is a T-shaped guide rail, a protruding part is arranged in the middle of the sliding rail, the upper part of the sliding block is fixedly arranged with the synchronous baffle, and the lower part of the sliding block is matched with the sliding rail and the I-shaped notch of the bottom plate; the middle part of the sliding block comprises a sliding block inner cavity and a pull rod fixed on the sliding block through a rotating sheath, a rotating spring is arranged on the rotating sheath, and the acting force of the spring is 0 when the pull rod is in a horizontal state; the pull rod can rotate through the rotating sheath, the other end of the pull rod is a hook and extends into a hole at one end of the constant force spring, and a pulley is arranged at one end, close to the sliding block, of the hole of the constant force spring.
Further, the constant force spring, the magnetic force spring and the compression spring are preset springs with different parameters.
Further, the profile of the cam groove is a first gear, neutral gear and second gear stroke profile designed according to gears; the torque after the gear shifting motor is started is input to the worm and gear box through a motor shaft and drives the gear set to rotate through the shaft, the lower gear of the gear set rotates to drive the space cam to coaxially rotate, and the shifting fork moves left and right along the outline of the cam groove due to the rotation of the space cam and drives the baffle to move when moving towards the direction of the synchronous baffle.
Further, the synchronous baffle can drive the sliding block to move along the direction of the sliding rail through the shifting fork, the bosses are a group of bosses which are distributed from top to bottom in sequence, and the protruding part length of the bosses is determined by the resistance distribution in design and corresponds to the compression spring group and the magnetic spring one by one; the boss and the compression spring support are detachably arranged, and different spring groups and bosses can be arranged; when the sliding block moves towards the spring baffle A, the hook-shaped end of the pull rod can drive the constant force spring to generate fixed resistance after certain displacement, after the sliding block passes through the protruding part, the pull rod rotates anticlockwise along the rotating sheath along with contact with the protruding part, and then the hook-shaped end of the pull rod moves downwards to be disconnected with the constant force spring due to the action of the pulley.
Further, the control method preparation step includes:
1) Calculating the required gear shifting force and the displacement distance of a shifting fork in the actual gear shifting process of the automatic transmission, and setting compression spring sets, magnetic springs and constant force springs of different groups to simulate the gear shifting force when different gears and vehicle speed conditions change;
2) The set compression spring set, the magnetic spring and the constant force spring are arranged on the compression spring support and the constant force spring support, and the sliding block and the synchronous baffle thereof are pushed to the initial end of a preset shifting fork displacement stroke;
3) Setting the position of a constant force spring, wherein the hook end of the constant force spring is required to be contacted with a pull rod to generate constant resistance after the sliding block reaches a preset position;
4) And setting a controller program for controlling the gear shifting motor, and matching the controller program with the gear shifting resistance set in the test for controlling the running speed of the gear shifting motor.
Further, the control method comprises the following operation steps:
5) Starting a controller program, enabling the gear shifting motor to positively start the gear shifting motor to drive an upper gear of the gear set to rotate clockwise after the gear shifting motor is subjected to speed reduction and torque increase through the worm gear box, and simultaneously driving the transmission shaft to rotate anticlockwise along with the space cam through a lower gear;
6) At the moment, the connecting part of the shifting fork is positioned at the first gear outline of the cam groove, and as the transmission shaft rotates anticlockwise, the shifting fork starts to be in contact with the pressure sensor due to outline change of the cam groove, the pressure sensor transmits a pressure signal to the pressure tester through a signal wire, and the shifting fork drives the synchronous baffle plate and the sliding block to move along the sliding rail in the direction away from the gear shifting motor;
7) In the displacement process of the synchronous baffle, the length of the boss is different, and the boss is sequentially contacted with the compression spring set and the magnetic spring in different displacement strokes to generate resistance, so that the effect of simulating the resistance source size change of the automatic transmission in different strokes is achieved;
8) The sliding block is contacted with the constant force spring to generate resistance after the set stroke is reached in the displacement process, the sliding block is contacted with the protruding part after the set stroke is continued to be displaced for one section, the sliding rod rotates anticlockwise along the rotating sheath under the action of the protruding part, the constant force spring is unhooked with the sliding rod through the pulley to stop generating resistance under the inclination action of the sliding rod, and the section of resistance is used for simulating the sudden appearance and disappearance process of some resistance sources in the synchronization process of the automatic transmission;
9) After the displacement distance of the shifting fork reaches a set value, the shifting motor stops running, the pressure tester records the pressure change value of the whole process, the shifting motor runs reversely after the recording is completed, the shifting fork is displaced towards the shifting motor, and the synchronous baffle is displaced towards the shifting motor under the action of the compression spring group and the magnetic spring until the compression spring group is deformed again, and all components are restored to the original position;
10 A) the test is completed.
Drawings
The contents of the drawings and the marks in the drawings of the present invention will be briefly described.
FIG. 1 is a schematic diagram of the main structure of the present invention.
Fig. 2 is a top view of the gantry apparatus.
FIG. 3 is a partial plan view of a slide rail and slider.
Fig. 4 is a schematic diagram of load force at the fork.
Reference numerals: 1. a shift motor; 2. a gear set; 3. a transmission shaft; 4. a space cam; 5. a cam groove; 6. a shifting fork; 7. a pressure sensor; 8. a boss; 9. a compression spring set; 10. an electromagnetic spring; 11. a spring baffle A;12. a spring baffle B;13. a constant force spring; 14. a pulley; 15. a pull rod; 16. a bottom plate; 17. a slide block; 18. a synchronizing baffle; 19. a slide rail; 20. a motor support; 21. a cam mechanism support; 22. a signal line; 23. a pressure tester; 24. installing a baffle; 25. a spring support; 26. rotating the sheath; 27. a protruding portion; 28. a slider inner cavity; 29. a worm wheel and worm box; 30. constant force spring support.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
In the description of the present application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "mated," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a removable connection, an interference connection, or an integral connection; the specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
Furthermore, in the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1, a gear shifting actuator bench test system and a control method thereof are provided, wherein the device comprises: a gear shifting motor 1, a gear set 2, a transmission shaft 3, a space cam 4, a cam groove 5, a shifting fork 6, a pressure sensor 7, a compression spring set 9, a magnetic spring 10, a constant force spring 13, a sliding block 17, a synchronous baffle 18, a sliding rail 19, a motor support 20 and a worm gear box 29; the gear shifting motor 1 is directly connected with an upper gear of the gear set 2 after being decelerated by a motor shaft through a worm gear box 29, one end of the transmission shaft 3 is directly connected with a lower gear of the gear set 2, the other end of the transmission shaft is fixedly connected with the space cam 4, and the shifting fork 6 is embedded into a cam groove 5 on the space cam 4 through a connecting rod and moves along with the groove track; the gear shifting motor 1 is a high-power high-torque small-volume motor; the sliding rail 19 is fixed on the bottom plate 16, and a spring baffle A11 and a spring baffle B12 are respectively arranged on two sides of the sliding rail 19; the constant force spring 13 is fixed on the spring baffle plate B12 through a constant force spring support 30, and the compression spring group 9 and the magnetic force spring 10 are fixed on the spring baffle plate A11 through a compression spring support 25; the sliding block 17 is mutually matched with the sliding rail 19 and slides on the track thereof; the synchronous baffle 18 is arranged on the sliding block 17, one side of the synchronous baffle 18 is provided with a pressure sensor 7, and the other side is provided with a boss 8 matched with the compression spring group 9 and the magnetic spring 10; the pressure sensor 7 is a sensor with high precision and quick response; the pressure sensor 7 is connected to a pressure tester 23 via a signal line 22, the pressure tester 23 being fastened to a mounting plate 24.
As shown in fig. 2 and 3, the gear shifting motor 1 is fixedly mounted on a motor support 20, the transmission shaft 3 is fixedly mounted on a cam mechanism support 21, and the motor support 20 is distributed in a stepwise decreasing manner with the cam mechanism support 21 and the bottom plate 16 in space; the upper gear and the lower gear of the gear set 2 are matched with each other, and the gear shifting motor 1 and the transmission shaft 3 are distributed at an angle of 90 degrees.
In this example, the sliding rail 19 is a T-shaped guide rail, the middle part of the sliding rail 19 has a protruding part 27, the upper part of the sliding block 17 is fixedly installed with the synchronous baffle 18, and the lower part is mutually matched with the sliding rail 19 and the i-shaped notch of the bottom plate 16; the middle part of the sliding block 17 comprises a sliding block inner cavity 28 and a pull rod 15 fixed on the sliding block 17 through a rotary sheath 26, a rotary spring is arranged on the rotary sheath 26, and the spring acting force is 0 when the pull rod 15 is in a horizontal state; the pull rod 15 can rotate through the rotating sheath 26, the other end of the pull rod is a hook and extends into a hole at one end of the constant force spring 13, and a pulley 14 is arranged at one end, close to the sliding block 17, of the hole of the constant force spring 13.
In this example, the profile of the cam groove 5 is a first, neutral and second gear stroke profile designed according to the gear; the torque after the gear shifting motor 1 is started is input to the worm gear box 29 through a motor shaft, the gear set 2 is driven to rotate through the shaft, the lower gear of the gear set 2 rotates to drive the space cam 4 to coaxially rotate, and the shifting fork 6 moves left and right along the outline of the cam groove 5 due to the rotation of the space cam 4, and can drive the baffle to move when moving towards the direction of the synchronous baffle 18.
In this example, the synchronous baffle 18 may drive the sliding block 17 to move along the direction of the sliding rail 19 through the shifting fork 6, the bosses 8 are a group of bosses distributed sequentially from top to bottom, and the protruding part length of the bosses 8 is determined by the resistance distribution in design and corresponds to the compression spring group 9 one by one; the boss 8 and the compression spring support 25 are detachably arranged, and different spring groups and bosses can be arranged; when the slider 17 moves toward the spring damper a11, the hook end of the pull rod 15 will drive the constant force spring 13 to generate a fixed resistance after a certain displacement, after the slider 17 passes the protrusion 27, the pull rod 15 rotates counterclockwise along the rotating sheath 26 along with contact with the protrusion 27, and then the hook end of the pull rod 15 moves downward to be out of contact with the constant force spring 13 due to the action of the pulley 14.
As shown in fig. 4, in this example, when the fork 6 is defined to be located at the first gear of the groove track of the cam groove 5, x is the origin of coordinates 0, and the direction toward the spring damper a11 along the origin of coordinates is the positive x-axis direction.
Under the coordinate system, the blocking force superposition model at the shifting fork is as follows:
wherein x is the displacement distance of the fork 6, which is in a range of about 0 to 20mm, in relation to the automatic transmission under consideration, wherein x1, x2, x3, x4 and xThe size of 5 is also relevant for the automatic transmission under study; f (x) is total spring stack force; μ is the coefficient of sliding friction; f (F) N The gravity of the auxiliary mechanism of the synchronous baffle 18; k (k) 1 A constant force spring 13 coefficient; n (N) 1 The total number of the constant force springs 13 is loaded; k (k) 2 The coefficient of the group A is the coefficient of the compression spring; d, d 2 The distance from one end of the compression spring A group close to the boss 8 to the origin is set; k (k) 3 The coefficient of the group B is the coefficient of the compression spring; d, d 3 The distance from one end of the compression spring B group close to the boss 8 to the origin is set; k (k) 4 The coefficient of the magnetic spring is 10; n (N) 2 The magnetic spring 10 is loaded with a total number.
The control method of the gear shifting executing mechanism bench test system provided by the invention is as follows.
The control method preparation step includes:
1) Calculating the required gear shifting force and the displacement distance of the shifting fork 6 in the actual gear shifting process of the automatic transmission, and setting compression spring groups 9, magnetic springs 10 and constant force springs 13 of different groups to simulate the gear shifting force when different gears and vehicle speeds change;
2) The set compression spring group 9, the magnetic spring 10 and the constant force spring 13 are arranged on the compression spring support 25 and the constant force spring support 30, and the sliding block 17 and the synchronous baffle 18 thereof are pushed to the initial end of a preset shifting fork displacement stroke;
3) Setting the position of a constant force spring 13, wherein the hook end of the constant force spring 13 needs to be contacted with a pull rod 15 to generate constant resistance after the sliding block 17 reaches a preset position;
4) And setting a controller program for controlling the gear shifting motor 1, and matching the controller program with the gear shifting resistance set in the test for controlling the running speed of the gear shifting motor 1.
After the preparation step is carried out, the control test of the upshift test of the automatic transmission is carried out, firstly, a controller program is started, the gear shifting motor 1 is positively started after receiving the upshift instruction, and drives the upper gear of the gear set 2 to rotate clockwise after the gear shifting motor is decelerated and torque-increased through the worm gear box 29, and simultaneously, the lower gear drives the transmission shaft 3 to rotate anticlockwise together with the space cam 4; at this time, the connection position of the shifting fork 6 is located at the first gear outline position of the cam groove 5, namely, the coordinate origin 0, along with the anticlockwise rotation of the transmission shaft 3, the shifting fork 6 is driven by the outline change of the cam groove 5 to start to contact with the pressure sensor 7, the pressure sensor 7 transmits a pressure signal to the pressure tester 23 through the signal line 22, the pressure tester 23 starts to record data, and the timer starts to count time.
After the time t1, friction resistance is generated between the sliding block 17 and the sliding rail 19, static friction is changed into dynamic friction, and the size of F (x) is changed from the maximum static friction force F3 to the sliding friction force F1 at the time t 1; the shifting fork 6 drives the synchronous baffle 18 and the sliding block 17 to move along the sliding rail 19 in the direction away from the gear shifting motor 1; in the displacement process, the shifting fork 6 drives the synchronous baffle 18, and the boss 8 sequentially contacts the compression spring group 9 and the magnetic spring 10 in different displacement strokes to generate resistance opposite to the displacement direction due to the difference of the lengths of the bosses 8, so that the effect of simulating the resistance source size change of the automatic transmission in different strokes is achieved, and the resistance is calculated in the preparation stage.
After the time t2, the sliding block 17 generates resistance when the pull rod 15 contacts with the constant force spring 13 after the set stroke is reached in the pushing displacement process of the synchronous baffle 18, and the size of F (x) is increased from F1 to F7 at the time t 2.
After the time t3, the boss 8 is connected with the first group of compression springs a, and the compression springs a generate contact resistance, and the resistance is in linear relation with the displacement x.
After the lapse of time t4, the magnitude of F (x) at this time is increased from F7 to F8 by the action of the compression spring a group, then the right end of the pull rod 15 is brought into contact with the protrusion 27, the pull rod 15 is rotated counterclockwise along the rotating sheath 26 by the protrusion 27, the constant force spring 13 is unhooked from the pull rod 15 by the pulley 14 by the tilting action of the pull rod 15, the resistance of the constant force spring 13 stops, and the period of time from F8 to F2, t2 to t4 is mainly used for simulating the abrupt occurrence and disappearance of some resistance sources during the gear shift process of the automatic transmission, and the magnitude of resistance is a calculated magnitude in the preparation stage, that is, the magnitude of resistance generated by the constant force spring 13.
After the time t5, the size of F (x) is increased from F2 to F4 under the action of the compression spring B group, the boss 8 is contacted with the second compression spring B group and the magnetic spring 10, the compression spring B group generates contact resistance, and the resistance is in linear relation with the displacement x; the magnetic spring 10 generates a constant resistance, the magnitude of which is consistent with the magnitude of the initial value of the preset constant force of the spring itself.
After the time t6, the size of F (x) is increased from F5 to F6 under the action of the compression spring B group and the magnetic spring 10, the upshifting process is finished, after the displacement distance of the shifting fork 6 reaches a set value, the gear shifting motor 1 stops running, and the pressure tester 23 records the pressure change value of the whole process.
After the pressure tester 23 finishes recording, the gear shifting motor 1 runs reversely, the shifting fork 6 moves towards the gear shifting motor 1, the synchronous baffle 18 moves towards the gear shifting motor 1 under the action of the compression spring group 9 and the magnetic spring 10 until the compression spring group 9 is restored to deformation, and all parts are restored to the original positions; and finally, finishing the test.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is capable of being modified or applied to other applications without any modification, as long as the inventive concept and technical scheme are adopted.
Claims (7)
1. An automatic transmission gear shifting executing mechanism test device and a test method are characterized in that the device comprises: the gear shifting device comprises a gear shifting motor (1), a gear set (2), a transmission shaft (3), a space cam (4), a cam groove (5), a shifting fork (6) and a worm gear box (29); the gear shifting motor (1) is directly connected with an upper gear of the gear set (2) after being decelerated by a motor shaft through a worm gear box (29), one end of the transmission shaft (3) is directly connected with a lower gear of the gear set (2), the other end of the transmission shaft is fixedly connected with the space cam (4), and the shifting fork (6) is embedded into a cam groove (5) on the space cam (4) through a connecting rod and moves along with the groove track.
The sliding rail (19) is fixed on the bottom plate (16), and a spring baffle A (11) and a spring baffle B (12) are respectively arranged on two sides of the sliding rail (19); the constant force spring (13) is fixed on the spring baffle plate B (12) through a constant force spring support (30), and the compression spring group (9) and the constant force spring (10) are fixed on the spring baffle plate A (11) through a compression spring support (25); the sliding block (17) is matched with the sliding rail (19) and slides on the rail; the synchronous baffle (18) is arranged on the sliding block (17), one side of the synchronous baffle (18) is provided with a pressure sensor (7), and the other side of the synchronous baffle is provided with a boss (8) matched with the compression spring group (9); the pressure sensor (7) is connected with a pressure tester (23) through a signal wire (22), and the pressure tester (23) is fixed on a mounting baffle plate (24).
2. The automatic transmission shift actuator test device and test method according to claim 1, wherein: the gear shifting motor (1) is fixedly arranged on the motor support (20), the transmission shaft (3) is fixedly arranged on the cam mechanism support (21), and the motor support (20) is distributed in a step-down manner with the cam mechanism support (21) and the bottom plate (16) in space; the upper gear and the lower gear of the gear set (2) are matched with each other, and the gear shifting motor (1) and the transmission shaft (3) are distributed at an angle of 90 degrees.
3. The automatic transmission shift actuator test device and test method according to claim 1, wherein: the sliding rail (19) is a T-shaped guide rail, a protruding part (27) is arranged in the middle of the sliding rail (19), the upper part of the sliding block (17) is fixedly arranged with the synchronous baffle (18), and the lower part of the sliding block is matched with the sliding rail (19) and the I-shaped notch of the bottom plate (16); the middle part of the sliding block (17) comprises a sliding block inner cavity (28) and a pull rod (15) fixed on the sliding block (17) through a rotating sheath (26), a rotating spring is arranged on the rotating sheath (26), and the acting force of the spring is 0 when the pull rod (15) is in a horizontal state; the pull rod (15) can rotate through the rotating sheath (26), the other end of the pull rod is a hook and extends into a hole at one end of the constant force spring (13), and a pulley (14) is arranged at one end, close to the sliding block (17), of the hole of the constant force spring (13).
4. The automatic transmission shift actuator test device and test method according to claim 1, wherein: the profile of the cam groove (5) is a first gear, neutral gear and second gear stroke profile designed according to gears; the torque after the gear shifting motor (1) is started is input to a worm gear box (29) through a motor shaft and drives a gear set (2) to rotate through the shaft, a lower gear of the gear set (2) rotates to drive a space cam (4) to coaxially rotate, and a shifting fork (6) moves left and right along the outline of a cam groove (5) due to the rotation of the space cam (4) and drives a baffle to move when moving towards a synchronous baffle (18).
5. The automatic transmission shift actuator test device and test method according to claim 1, wherein: the synchronous baffle (18) can drive the sliding block (17) to move along the direction of the sliding rail (19) through the shifting fork (6), the bosses (8) are sequentially distributed from top to bottom, and the protruding part length of the bosses (8) is determined by the resistance distribution in design and corresponds to the compression spring group (9) and the magnetic spring (10) one by one; the boss (8) and the compression spring support (25) are detachably arranged, and different spring groups and bosses can be arranged; when the sliding block (17) moves towards the spring baffle A (11), the hook-shaped end of the pull rod (15) drives the constant force spring (13) to generate fixed resistance after a certain displacement, after the sliding block (17) passes through the protruding part (27), the pull rod (15) rotates anticlockwise along the rotating sheath (26) along with being contacted with the protruding part (27), and then the hook-shaped end of the pull rod (15) moves downwards to be disconnected from the constant force spring (13) due to the action of the pulley (14).
6. The automatic transmission shift actuator test apparatus and test method according to claim 1, wherein the control method preparation step includes:
1) Calculating the gear shifting force required by the automatic transmission in the actual gear shifting process and the displacement distance of a shifting fork (6), and setting compression spring sets (9), magnetic springs (10) and constant force springs (13) of different groups to simulate the gear shifting force when different gears and vehicle speed conditions change;
2) The set compression spring group (9), the magnetic spring (10) and the constant force spring (13) are arranged on the compression spring support (25) and the constant force spring support (30), and the sliding block (17) and the synchronous baffle (18) thereof are pushed to the initial end of a preset shifting fork displacement stroke;
3) Setting the position of a constant force spring (13), wherein the hook end of the constant force spring (13) needs to be contacted with a pull rod (15) to generate constant resistance after the sliding block (17) reaches a preset position;
4) And setting a controller program for controlling the gear shifting motor (1), and matching the controller program with the gear shifting resistance set in the test for controlling the running speed of the gear shifting motor (1).
7. The automatic transmission shift actuator test apparatus and test method according to claim 1, wherein the control method operation steps include:
5) Starting a controller program, enabling the gear shifting motor (1) to positively start the gear shifting motor to drive an upper gear of the gear set (2) to rotate clockwise after the gear shifting motor is decelerated and torque-increased through the worm gear box (29), and simultaneously enabling a lower gear to drive the transmission shaft (3) to rotate anticlockwise together with the space cam (4);
6) At the moment, the connecting part of the shifting fork (6) is positioned at the first gear outline of the cam groove (5), along with the anticlockwise rotation of the transmission shaft (3), the shifting fork (6) starts to be in contact with the pressure sensor (7) due to the outline change of the cam groove (5), the pressure sensor (7) transmits a pressure signal to the pressure tester (23) through the signal wire (22), and the shifting fork (6) drives the synchronous baffle (18) and the sliding block (17) to move along the sliding rail (19) in the direction away from the gear shifting motor (1);
7) In the displacement process of the synchronous baffle (18), the boss (8) is sequentially contacted with the compression spring group (9) and the magnetic spring (10) in different displacement strokes due to the difference of the lengths of the boss (8), so that the effect of simulating the resistance source size change of the automatic transmission in different strokes is achieved;
8) The sliding block (17) is in contact with the constant force spring (13) to generate resistance after the set stroke is reached in the displacement process, the sliding block (17) is in contact with the protruding part (27) at the right end of the sliding block (15) after the set stroke is continued, the sliding block (15) rotates anticlockwise along the rotating sheath (26) under the action of the protruding part (27), the constant force spring (13) is in unhooking with the sliding block (15) through the pulley (14) to stop generating resistance under the inclination action of the sliding block (15), and the resistance is used for simulating the sudden appearance and disappearance of some resistance sources in the synchronization process of the automatic transmission;
9) After the displacement distance of the shifting fork (6) reaches a set value, the shifting motor (1) stops running, a pressure tester (23) records the pressure change value of the whole process, after the recording is completed, the shifting motor (1) runs reversely, the shifting fork (6) displaces towards the shifting motor (1), the synchronous baffle (18) displaces towards the shifting motor (1) under the action of the compression spring group (9) and the magnetic spring (10) until the compression spring group (9) is deformed, and all components are restored to the original positions;
10 A) the test is completed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311531504.1A CN117664556A (en) | 2023-11-16 | 2023-11-16 | Automatic transmission gear shifting executing mechanism test device and test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311531504.1A CN117664556A (en) | 2023-11-16 | 2023-11-16 | Automatic transmission gear shifting executing mechanism test device and test method |
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| CN202311531504.1A Pending CN117664556A (en) | 2023-11-16 | 2023-11-16 | Automatic transmission gear shifting executing mechanism test device and test method |
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