AMT gear shifting actuator endurance test device

Abstract

The present application belongs to the gearbox testing technical field, specifically relates to a kind of AMT shift actuator endurance test device, comprising: multiple shift fork shafts, drive shift mechanism and base, and the shift fork shaft is opened with limit slot hole;Drive shift mechanism is used to drive shift fork shaft linear reciprocating movement;Base is opened with multiple jack, respectively extends to multiple jack installation hole, the inner hole that makes adjacent jack intercommunication, multiple shift fork shafts are inserted in corresponding jack in one-to-one correspondence movement, and self-locking mechanism is arranged in installation hole, and self-locking mechanism has elastic pressure to corresponding shift fork shaft, for simulating the shift force in the process of shift, and movable limiting piece is arranged in the inner hole and cooperates with limit slot hole, and one shift fork shaft executes action and drives limiting piece end portion to insert the limit slot hole of adjacent another shift fork shaft, effectively avoid driving multiple shift fork shafts simultaneously, so that test can be carried out smoothly, and the accuracy of test result is not influenced.

Description

Technical Field

[0001] This invention belongs to the field of gearbox testing technology, specifically relating to a durability testing device for an AMT shift actuator. Background Technology

[0002] With increasingly fierce market competition, automobile manufacturers are facing growing pressure. To meet user demands for product performance, quality, price, reliability, and durability, manufacturers need to improve efficiency and reduce costs at every stage of product development and manufacturing. Among these efforts, vehicle durability testing plays a crucial role in vehicle development. Statistics show that over 90% of automotive component failures are due to fatigue failure; therefore, durability testing of gear shift actuators is particularly important.

[0003] Durability testing of automotive gear shifting mechanisms is mainly divided into public road durability testing, proving ground durability testing, and laboratory simulation testing. Laboratory simulation testing uses specialized testing equipment and fixtures to simulate the gear shifting process of a vehicle in actual use, thereby conducting durability tests on the gear shifting actuator.

[0004] Existing durability testing devices for gear shifting actuators simulate multiple shifting actuators with multiple shift fork shafts. To drive these shafts, the mechanism requires an actuator that changes position, resulting in a complex structure. Furthermore, inaccurate execution can lead to failure to identify the target shift fork shaft or the simultaneous driving of two adjacent shafts. Sometimes, misaligned timing of multiple actions can cause the simultaneous driving of multiple shift fork shafts, leading to abnormal shifting and affecting the accuracy of the test results. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an AMT shift actuator durability testing device that effectively avoids driving multiple shift fork shafts at the same time, so that the test can be carried out smoothly and without affecting the accuracy of the test results.

[0006] This invention provides an AMT shift actuator durability testing device, comprising: Multiple shift fork shafts, wherein each shift fork shaft has a limiting slot hole; Drive the shift mechanism to drive the shift fork shaft to move linearly and reciprocally; The base has at least one of the bases having multiple insertion holes, mounting holes extending to the multiple insertion holes, and an inner hole connecting adjacent insertion holes. The multiple shift fork shafts are movably inserted into the corresponding insertion holes one by one. A self-locking mechanism is provided in the mounting hole. The self-locking mechanism has elastic pressure on the corresponding shift fork shaft to simulate the shifting force during the shifting process. A movable limiting member that cooperates with the limiting slot is provided in the inner hole. When one of the shift fork shafts performs an action, it drives the end of the limiting member to insert into the limiting slot of another adjacent shift fork shaft.

[0007] Optionally, each of the shift fork shafts is controlled by a corresponding drive shifting mechanism; The drive shifting mechanism includes: a motor, a shaft gear mounted on the output shaft of the motor, a swinging component meshing with the shaft gear, and a shifting block that is in transmission cooperation with the swinging component; the shifting block is fixedly connected to the shift fork shaft, and the power of the motor drives the swinging component to swing back and forth through the shaft gear, so that the shifting block and the shift fork shaft move back and forth in a straight line along the insertion hole to realize shifting.

[0008] Optionally, the oscillating component includes: a sector gear meshing with the shaft gear, a transmission gear fixedly connected to and coaxial with the sector gear, and a shift finger meshing with the transmission gear, wherein the shift finger is inserted into the shift block after it moves.

[0009] Optionally, the shift paddle has a groove, the inner wall of the groove and / or the end of the shift finger that mates with the shift paddle has an arc surface, and the shift finger slides in the groove.

[0010] Optionally, the drive shifting mechanism further includes a housing, a housing, and a base plate. The housing, housing, and base plate together enclose a mounting cavity. The motor is fixedly connected to the housing and its output shaft extends into the mounting cavity. The shaft gear and the swing member are disposed in the mounting cavity. The base plate has a clearance hole for the swing member to pass through. The base plate spans multiple shift fork shafts.

[0011] Optionally, the testing apparatus further includes a support frame and a support base disposed on the top surface of the support frame, wherein the base is fixedly connected to the top of the support frame, and the top of the support base is fixedly connected to the base plate.

[0012] Optionally, the shift fork shaft is provided with multiple resistance grooves, which cooperate with the self-locking mechanism.

[0013] Optionally, the self-locking mechanism includes a self-locking bolt, a self-locking spring, and a self-locking steel ball arranged in sequence. The self-locking bolt is screwed into the mounting hole, the self-locking spring has a pre-compression amount, and the self-locking ball is in rolling engagement with the corresponding shift fork shaft.

[0014] Optionally, the movable limiting member is a plurality of closely attached spheres or a cylinder with spherical surfaces at both ends.

[0015] Optionally, a mounting screw hole is provided on one side of the base, the axis of the mounting screw hole and the inner hole coincide, and a sealing bolt is screwed into the mounting screw hole.

[0016] AMT: Electronically controlled mechanical automatic transmission.

[0017] The beneficial effect of this invention is that by driving the shifting mechanism to move a certain shift fork shaft, and causing the movable limiting member to move into the limiting slot of an adjacent shift fork shaft, the movement of the subsequent shift fork shaft is restricted. This achieves the following: during the shifting process, when a certain gear is engaged, the movable limiting member presses against another shift fork shaft to prevent it from engaging at the same time. When shifting gears again, the previous shift fork shaft resets, and the adjacent shift fork shaft moves under the drive of the shifting mechanism, causing the movable limiting member to move into the limiting slot of the previous shift fork shaft. This process is repeated, effectively avoiding the simultaneous driving of multiple shift fork shafts, allowing the test to proceed smoothly without affecting the accuracy of the test results. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the durability testing device for the AMT shift actuator of the present invention; Figure 2 This is a partial cross-sectional view of the durability testing device for the AMT shift actuator of the present invention; Figure 3 for Figure 2 Enlarged view of area A in the image; Figure 4 This is a longitudinal sectional view of the durability testing device for the AMT shift actuator of the present invention; Figure 5 for Figure 4 Enlarged view of area B in the image.

[0019] In the diagram: 100, shift fork shaft; 101, limit slot; 102, resistance groove; 200, drive shifting mechanism; 210, motor; 220, shaft gear; 230, swinging component; 231, sector gear; 232, transmission gear; 233, shift finger; 240, shift block; 250, housing one; 260, housing two; 270, base plate; 300, base; 301, insertion hole; 302, mounting hole; 303, inner hole; 304, mounting screw hole; 400, self-locking mechanism; 410, self-locking bolt; 420, self-locking spring; 430, self-locking steel ball; 500, movable limit component; 600, sealing bolt; 700, support frame; 800, support base. Detailed Implementation

[0020] like Figure 1-5As shown, the present invention provides an AMT shift actuator durability testing device, comprising: multiple shift fork shafts 100, a drive shift mechanism 200, and a base 300; wherein, the shift fork shafts 100 are provided with limit slots 101; the drive shift mechanism 200 is used to drive the shift fork shafts 100 to move linearly reciprocally; at least one base 300 is provided with multiple insertion holes 301, mounting holes 302 extending to the multiple insertion holes 301 respectively, and inner holes 301 connecting adjacent insertion holes 301. 03. Multiple shift fork shafts 100 are movably inserted into corresponding insertion holes 301. A self-locking mechanism 400 is provided in the mounting hole 302. The self-locking mechanism 400 exerts elastic pressure on the corresponding shift fork shaft 100 to simulate the shifting force during the shifting process. A movable limiting member 500 that cooperates with the limiting slot hole 101 is provided in the inner hole 303. When one shift fork shaft 100 performs an action, it drives the end of the limiting member to insert into the limiting slot hole 101 of another adjacent shift fork shaft 100.

[0021] Compared with the prior art, the AMT shift actuator durability testing device provided by the present invention drives the shift mechanism 200 to move a certain shift fork shaft 100 and moves the movable limiting member 500 into the limiting slot 101 of an adjacent shift fork shaft 100, restricting the movement of the next shift fork shaft 100. During the shifting process, when a certain gear is engaged, the movable limiting member 500 presses against another shift fork shaft 100 to prevent it from being engaged at the same time. When shifting gears again, the previous shift fork shaft 100 resets, and the adjacent shift fork shaft 100 moves under the drive of the shift mechanism 200, causing the movable limiting member 500 to move into the limiting slot 101 of the previous shift fork shaft 100. This process is repeated, effectively avoiding the simultaneous driving of multiple shift fork shafts 100, allowing the test to proceed smoothly without affecting the accuracy of the test results.

[0022] It should be noted that, in the initial state, the limiting slots 101 of each shift fork shaft 100 are axially coincident. The limiting slots 101 can be blind holes with a certain depth or through holes.

[0023] In one embodiment, such as Figure 5 As shown, the shift fork shaft 100 has multiple resistance grooves 102, which cooperate with the self-locking mechanism 400. Specifically, each shift fork shaft has three or more resistance grooves 102 on its top, which are in a straight line direction. The resistance grooves 102 are spherical grooves or conical grooves.

[0024] In one embodiment, such as Figure 4As shown, each shift fork shaft 100 is controlled by a corresponding drive shifting mechanism 200. The drive shifting mechanism 200 includes: a motor 210, a shaft gear 220 mounted on the output shaft of the motor 210, a swing member 230 meshing with the shaft gear 220, and a shift block 240 that is in transmission cooperation with the swing member 230. The shift block 240 is fixedly connected to the shift fork shaft 100. The power of the motor 210 drives the swing member 230 to swing back and forth through the shaft gear 220, causing the shift block 240 and the shift fork shaft 100 to move linearly back and forth along the insertion hole 301, thereby realizing gear shifting. Specifically, taking two shift fork shafts 100 as an example, the two drive shifting mechanisms 200 are combined together. In each drive shifting mechanism 200, the motor 210 drives the shaft gear 220, causing the swing member 230 to swing left and right, causing the shift block 240 to move left and right, thereby causing the shift fork shaft 100 to move to complete gear shifting and resetting. The drive shifting mechanism 200 designed in this invention not only enables the shift fork shaft 100 to smoothly perform shifting, but also adopts a staggered layout for the shaft gear 220, swing member 230 and shift block 240 of different drive shifting mechanisms 200, which can reduce the volume of the drive shifting mechanism 200.

[0025] It should be noted that the present invention uses a speed sensor and an angle sensor on the actuator to connect to a low-voltage wiring harness, which in turn connects to the TCU controller. The core of the TCU controller's shifting principle lies in using sensor operating parameters and then, according to preset shifting logic and control strategies, precisely controlling the shifting actuator to achieve a smooth, fast, and accurate shifting process. This is existing technology and will not be elaborated further.

[0026] In one embodiment, such as Figure 4 As shown, the oscillating component 230 includes: a sector gear 231 meshing with the shaft gear 220; a transmission gear 232 fixedly connected to and coaxial with the sector gear 231; and a shift finger 233 meshing with the transmission gear 232. The shift finger 233 is inserted into the shift block 240 after it moves. Specifically, in each drive shift mechanism 200, the motor 210 drives the shaft gear 220, causing the sector gear 231 to oscillate left and right, causing the transmission gear 232 to rotate reciprocally. Under the drive of the transmission gear 232, the shift finger 233 oscillates left and right around the rotation center, thereby causing the shift block 240 to move left and right, and thus causing the shift fork shaft 100 to move to complete the shifting and resetting.

[0027] It should be noted that the maximum shifting force of the drive shifting mechanism 200 is calculated as follows: Assuming the rated torque of the motor 210 is T1, the number of teeth of the shaft gear 220 on the rotating shaft is Z1, the number of teeth of the sector gear 231 is Z2, the number of teeth of the transmission gear 232 is Z3, and the number of teeth of the shifting finger 233 (the part that meshes with the transmission gear 232 is a sector tooth) is Z4, then the total speed ratio i = Z2 / Z1 × Z4 / Z3, the torque transmitted on the shifting finger 233 is T2 = T1 × i, and the total torque is T3 = T2 × L, where L is the lever arm length.

[0028] In one embodiment, the shift paddle 240 has a groove, and the inner wall of the groove and / or the end of the shift finger 233 that mates with the shift paddle 240 has an arc surface, allowing the shift finger 233 to slide in the groove. Understandably, during gear shifting, the shift finger 233 contacts the inner wall of the groove in the shift paddle 240. The arc surface mating between the inner wall of the groove and the end face of the shift finger 233 reduces resistance and improves the smoothness of gear shifting.

[0029] In one embodiment, the drive shifting mechanism 200 further includes a first housing 250, a second housing 260, and a base plate 270. The first housing 250, the second housing 260, and the base plate 270 enclose a mounting cavity. A motor 210 is fixedly connected to the first housing 250, and its output shaft extends into the mounting cavity. A shaft gear 220 and a swing member 230 are disposed in the mounting cavity. The base plate 270 has a clearance hole for the swing member 230 to pass through. The base plate 270 spans multiple shift fork shafts 100. Specifically, the motor 210 is fixed to the outside of the first housing 250 by bolts, and its output shaft extends into the inside of the first housing 250. A rotating shaft is fixed on the sector gear 231, and the rotating shaft is rotatably connected to the inside of the first housing 250. A transmission gear 232 is coaxially connected to the rotating shaft. Another rotating shaft is fixed on the shift finger 233, and this rotating shaft is also rotatably connected to the inside of the first housing 250. Housing 1 250, housing 2 260 and base plate 270 serve to install and protect the drive shift mechanism 200.

[0030] In one embodiment, the test apparatus further includes a support frame 700 and a support base 800 disposed on the top surface of the support frame 700. The base 300 is fixedly connected to the top of the support frame 700, and the top of the support base 800 is fixedly connected to the base plate 270. Specifically, the support base 800 is fixed to the ground and provides support for the entire test apparatus. The support frame 700 spans the shift fork shaft 100 and provides support for the drive shifting mechanism 200 used.

[0031] In one embodiment, such as Figure 2 and Figure 3As shown, the self-locking mechanism 400 includes a self-locking bolt 410, a self-locking spring 420, and a self-locking steel ball 430 arranged sequentially. The self-locking bolt 410 is screwed into the mounting hole 302, the self-locking spring 420 has a pre-compression amount, and the self-locking ball is in rolling engagement with the corresponding shift fork shaft 100. Specifically, under the action of the self-locking spring 420, the self-locking steel ball 430 always exerts downward pressure on the shift fork shaft 100. The process of the self-locking steel ball 430 disengaging from the resistance groove 102 simulates the resistance of the gear shifting process, making the gear shifting process closer to the real situation. In different gears, the self-locking steel ball 430 is in the resistance groove 102 at different positions.

[0032] In one embodiment, the movable limiting member 500 is a plurality of closely spaced spheres or a cylinder with spherical ends. Specifically, when the movable limiting member 500 is a plurality of closely spaced spheres, two, three or more spheres are installed in the inner hole 303. The spheres are steel balls with a diameter larger than, but not exceeding twice, the diameter of the limiting slot 101. This ensures that a portion of the steel ball enters the limiting slot 101 to provide sufficient limiting effect on the shift fork shaft 100, while preventing the steel ball from completely entering the limiting slot 101. This allows the steel ball to be pushed to the other side when the shift fork shaft 100 moves, thus limiting the movement of another shift fork shaft 100. Limiting; when the movable limiting component 500 is a column with spherical surfaces at both ends, only one needs to be set in the inner hole 303. The diameter of the end face of the column is larger than the diameter of the limiting slot 101, but not more than twice, so as to ensure that a part of the spherical surface of the column enters the limiting slot 101 to have a sufficient limiting effect on the shift fork shaft 100, while not allowing the spherical surface to completely enter the limiting slot 101. This allows the column to be squeezed to the other side when the shift fork shaft 100 moves, thus limiting the other shift fork shaft 100.

[0033] In one embodiment, a mounting screw hole 304 is provided on one side of the base 300. The axis of the mounting screw hole 304 coincides with that of the inner hole 303, and a sealing bolt 600 is screwed into the mounting screw hole 304. When the shift fork shaft 100 is not installed in the insertion hole 301 on one side of the base 300, the movable limiting member 500 is inserted into the inner hole 303 through the mounting screw hole 304, the shift fork shaft 100 is then installed, and the mounting screw hole 304 is sealed with the sealing bolt 600 to prevent foreign objects from entering and affecting the shift fork shaft 100's gear shifting.

[0034] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0035] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A durability testing device for an AMT shift actuator, characterized in that, include: Multiple shift fork shafts (100), wherein a limiting slot (101) is formed on the shift fork shaft (100); Drive shift mechanism (200) for driving shift fork shaft (100) to move linearly and reciprocally; The base (300) has multiple insertion holes (301), mounting holes (302) extending to the multiple insertion holes (301), and an inner hole (303) connecting adjacent insertion holes (301). Multiple shift fork shafts (100) are movably inserted into the corresponding insertion holes (301) one by one. A self-locking mechanism (400) is provided in the mounting hole (302). The self-locking mechanism (400) has elastic pressure on the corresponding shift fork shaft (100) to simulate the shifting force during the shifting process. A movable limiting member (500) that cooperates with the limiting slot (101) is provided in the inner hole (303). When one shift fork shaft (100) performs an action, it drives the end of the limiting member to be inserted into the limiting slot (101) of another adjacent shift fork shaft (100).

2. The experimental apparatus according to claim 1, characterized in that, Each of the shift fork shafts (100) is controlled by a corresponding drive shift mechanism (200). The drive shifting mechanism (200) includes: a motor (210), a shaft gear (220) disposed on the output shaft of the motor (210), a swing member (230) meshing with the shaft gear (220), and a shift block (240) that is in transmission cooperation with the swing member (230); the shift block (240) is fixedly connected to the shift fork shaft (100), and the power of the motor (210) drives the swing member (230) to swing back and forth through the shaft gear (220), so that the shift block (240) and the shift fork shaft (100) move back and forth in a straight line along the insertion hole (301) to realize shifting.

3. The experimental apparatus according to claim 2, characterized in that, The swing element (230) includes: a sector gear (231) meshing with the shaft gear (220), a transmission gear (232) fixedly connected to and coaxial with the sector gear (231), and a shift finger (233) meshing with the transmission gear (232). The shift finger (233) is inserted into the shift block (240) after it moves.

4. The experimental apparatus according to claim 3, characterized in that, The shift paddle (240) has a groove, and the inner wall of the groove and / or the end of the shift finger (233) that mates with the shift paddle (240) has an arc surface, and the shift finger (233) slides in the groove.

5. The test apparatus according to any one of claims 2-4, characterized in that, The drive shifting mechanism (200) also includes a housing one (250), a housing two (260), and a base plate (270). The housing one (250), housing two (260), and base plate (270) enclose an installation cavity. The motor (210) is fixedly connected to the housing one (250) and its output shaft extends into the installation cavity. The shaft gear (220) and the swing member (230) are disposed in the installation cavity. The base plate (270) has a clearance hole for the swing member (230) to pass through. The base plate (270) spans multiple shift fork shafts (100).

6. The experimental apparatus according to claim 5, characterized in that, It also includes a support frame (700) and a support base (800) disposed on the top surface of the support frame (700), wherein the base (300) is fixedly connected to the top of the support frame (700), and the top of the support base (800) is fixedly connected to the base plate (270).

7. The experimental apparatus according to claim 1, characterized in that, The shift fork shaft (100) is provided with a plurality of resistance grooves (102), which cooperate with the self-locking mechanism (400).

8. The test apparatus according to any one of claims 1-4, 6, and 7, characterized in that, The self-locking mechanism (400) includes a self-locking bolt (410), a self-locking spring (420), and a self-locking steel ball (430) arranged in sequence. The self-locking bolt (410) is screwed into the mounting hole (302), the self-locking spring (420) has a pre-compression amount, and the self-locking ball is in rolling engagement with the corresponding shift fork shaft (100).

9. The test apparatus according to any one of claims 1-4, 6, and 7, characterized in that, The movable limiting member (500) is a plurality of closely attached spheres or a cylinder with spherical surfaces at both ends, and the diameter of the limiting slot (101) is smaller than the diameter of the movable limiting member (500).

10. The test apparatus according to any one of claims 1-4, 6, and 7, characterized in that, The base (300) has a mounting screw hole (304) on one side. The axis of the mounting screw hole (304) and the inner hole (303) coincide. A sealing bolt (600) is screwed into the mounting screw hole (304).

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