A shift mechanism testing device and its corresponding testing method

Abstract

The present invention provides a shift selection mechanism testing device, which can respectively complete clearance testing and shifting force testing when the position of the shift selection mechanism remains unchanged, making the testing quick, convenient and with high testing accuracy. It includes a workbench surface, on the upper surface of which there are a number of upwardly convex positioning pins. The bottom of the shift selection device to be detected is positioned corresponding to the positioning pins and supported on the upper surface of the workbench surface. The workbench surface is provided with a through avoidance hole corresponding to the position of the shift fork head. In the detection state, after the shift fork head penetrates through the through avoidance hole, it is exposed below the workbench surface. The upper cylinder mounting plate is fixedly installed directly above the workbench surface through four first columns, and the lower cylinder mounting plate is fixedly installed directly below the workbench surface through four second columns. A pressing cylinder is fixedly installed on the upper cylinder mounting plate, and the lower pressing head of the pressing cylinder faces downward towards the shift selection device to be detected.

Description

Technical Field

[0001] The present invention relates to the technical field of testing a shift selecting and shifting mechanism, and specifically provides a testing device for a shift selecting and shifting mechanism. The present invention also provides a testing method for the shift selecting and shifting mechanism. Background Art

[0002] Since the shift selecting and shifting mechanism itself is driven by mechanical fits such as splines and flat shafts, there is a difference between the test position of its own angle sensor and the position of the final acting shift head. The existing clearance test is to detect the clearance value in mechanical transmission, so as to correct or control the position of the shift selecting and shifting mechanism. At the same time, when the shift selecting and shifting mechanism acts on the transmission, the shifting force is a parameter that determines whether the shift head of the shift selecting and shifting mechanism can smoothly enter the gear. The existing technology generally directly obtains it by directly hitting the test rod with the shift head. However, during the test, there are situations such as shaking on the working surface where the test rod is attached, resulting in a relatively small actual value obtained from the test; and the existing clearance test and shifting force test of the shift selecting and shifting mechanism need to be completed on different mechanisms, which makes the test cycle long and the test accuracy relatively low. Summary of the Invention

[0003] In view of the above problems, the present invention provides a testing device for a shift selecting and shifting mechanism, which can respectively complete the clearance test and the shifting force test without moving the position of the shift selecting and shifting mechanism, making the test fast and convenient, and having high test accuracy.

[0004] A shift selector mechanism testing device, characterized in that: it includes a workbench surface, and several upwardly convex positioning pins are arranged on the upper surface of the workbench surface. The bottom of the shift selector device to be detected is positioned corresponding to the positioning pins and supported on the upper surface of the workbench surface. The workbench surface is provided with a through avoidance hole corresponding to the position of the shift fork head. In the detection state, after the shift fork head penetrates through the through avoidance hole, it is exposed below the workbench surface. The upper cylinder mounting plate is fixedly installed directly above the workbench surface through four first columns, and the lower cylinder mounting plate is fixedly installed directly below the workbench surface through four second columns. A pressing cylinder is fixedly installed on the upper cylinder mounting plate, and the lower pressing head of the pressing cylinder faces downward towards the shift selector device to be detected. A square through hole is provided at the position of the lower cylinder mounting plate corresponding to the shift fork head. The upper guiding outer periphery of the shift fork head groove block is embedded in the square through hole. A inner groove is provided at the center of the upper surface of the shift fork head groove block. The bottom connecting end of the shift fork head groove block is connected to the top piston connecting block of the shift fork head cylinder. The shift fork head cylinder is connected to the corresponding position on the lower surface of the lower cylinder mounting plate through a mounting seat. At the bottom of one end of the lower cylinder mounting plate, a shift force cylinder is also fixedly provided. The horizontal piston end of the shift force cylinder is fixedly connected to a cylinder connecting plate. A pressure sensor is fixedly installed on the vertical surface of the upper part of the cylinder connecting plate corresponding to the position of the shift fork head. A force measuring rod is fixedly connected to the pressure sensor, and the force measuring rod faces the shift fork head. The force measuring rod and the connecting rod of the horizontal piston end are arranged in parallel. A push block cylinder is fixedly installed on the other vertical surface of the cylinder connecting plate. The top piston end of the push block cylinder is fixedly connected to a push block, and the push block is arranged in the lower area of the workbench surface.

[0005] It is further characterized in that:

[0006] An upwardly convex block is provided at the top of the cylinder connecting plate, and a guiding through groove is provided at the position of the workbench surface corresponding to the upwardly convex block. When the shift force cylinder drives the cylinder connecting plate to move horizontally, the upwardly convex block moves along the guiding through groove to ensure stable and reliable moving direction;

[0007] The cylinder block of the shift fork head cylinder is fixedly installed on a third cylinder mounting plate. The third cylinder mounting plate is fixedly connected to the corresponding position on the lower surface of the lower cylinder mounting plate through a pair of vertical plates. The bottom connecting end of the shift fork head groove block is located in the corresponding height area of the vertical plates. The top piston connecting block of the shift fork head cylinder is connected to the bottom connecting end of the shift fork head groove block;

[0008] A T-shaped groove is provided at the bottom connecting end of the shift fork head groove block, and the top piston connecting block is embedded in the T-shaped groove, ensuring quick and convenient connection and quick and convenient disassembly.

[0009] A test method for a shift selector mechanism, characterized in that: after fixing the position of the shift selector mechanism, clearance test and shift force test are respectively carried out to obtain corresponding values.

[0010] It is further characterized in that: the shift selector mechanism is fixed on the upper surface of the workbench through the pressing head of the pressing cylinder, and at the same time, the shifting head penetrates through the through-hole for avoidance and is arranged below the workbench. Then, the shifting head groove cylinder moves to drive the shifting head groove block to rise to the limit position, and the shifting head enters the inner groove of the shifting head groove block. After that, the shifting head of the shift selector mechanism starts to move. When the shifting head touches any one of the two side walls of the inner groove, a large current will appear in the motor of the shift selector mechanism. By monitoring the current value, the movement of the shifting head is stopped, and the readings of different angle sensors when the shifting head touches the two sides of the inner groove are calculated. Combining the width of the inner groove itself and the width of the shifting head, the mechanism clearance value is obtained. After the clearance test is completed, the shifting head returns to the initial position, and the shifting head groove cylinder resets; then, the shift force cylinder moves to drive the test rod to move towards the shifting head. When it moves to the limit, the push block cylinder pushes the push block against the workbench, and the shift selector mechanism moves. The shifting head hits the end of the test rod, and the pressure sensor obtains the corresponding reading as the shift force of the mechanism;

[0011] Reversing the order of the clearance test and the shift force test does not affect the final test result.

[0012] After adopting the above technical solution, the clearance test and the shift force test are concentrated on one device for operation, so that the shift selector mechanism only needs to be positioned once. And when the shift force test is carried out, the position of the pressure sensor of the force measuring rod is fixed by the push block cylinder, making the value obtained by the pressure sensor accurate and reliable; without moving the position of the shift selector mechanism, the clearance test and the shift force test can be respectively completed, making the test fast and convenient, and the test accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic three-dimensional structure diagram of the present invention;

[0014] Figure 2 It is a schematic three-dimensional structure diagram of the shift force test part of the present invention;

[0015] Figure 3 It is a schematic side three-dimensional structure diagram of the clearance test part of the present invention;

[0016] The names corresponding to the serial numbers in the figure are as follows:

[0017] Workbench surface 1, shift selection device to be detected 2, shift head 3, upper cylinder mounting plate 4, first upright column 5, lower cylinder mounting plate 6, second upright column 7, pressing cylinder 8, square through hole 9, shift head groove block 10, inner groove 11, shift head groove cylinder 12, top piston connecting block 13, shift force cylinder 14, cylinder connecting plate 15, upper convex block 151, pressure sensor 16, force measuring rod 17, connecting rod 18, push block cylinder 19, push block 20, guiding through groove 21, third cylinder mounting plate 22, vertical plate 23, T-shaped groove 24, lower pressing head 25. Specific implementation manner

[0018] A shift selection mechanism testing device, as shown in Figures 1 - 3 : It includes a workbench surface 1. On the upper surface of the workbench surface 1, several upwardly convex positioning pins (not shown in the figure, belonging to conventional positioning structures) are provided. The bottom of the shift selection device 2 to be detected is positioned corresponding to the arrangement of the positioning pins and supported on the upper surface of the workbench surface 1. The workbench surface 1 is provided with a through avoidance hole corresponding to the position of the shift head 3. In the detection state, after the shift head 3 penetrates through the through avoidance hole, it is exposed below the workbench surface 1. The upper cylinder mounting plate 4 is fixedly installed directly above the workbench surface 1 through four first upright columns 5. The lower cylinder mounting plate 6 is fixedly installed directly below the workbench surface 1 through four second upright columns 7. A pressing cylinder 8 is fixedly installed on the upper cylinder mounting plate 4. The lower pressing head 25 of the pressing cylinder 8 faces the shift selection device 2 to be detected below. A square through hole 9 is provided at the position of the lower cylinder mounting plate 6 corresponding to the shift head 3. The upper guiding outer periphery of the shift head groove block 10 is embedded in the square through hole 9. An inner groove 11 is provided at the center of the upper surface of the shift head groove block 10. The bottom connecting end of the shift head groove block 10 is connected to the top piston connecting block 13 of the shift head groove cylinder 12. The shift head groove cylinder 12 is connected to the corresponding position on the lower surface of the lower cylinder mounting plate 6 through a mounting seat. At the bottom of one end of the lower cylinder mounting plate 6, a shift force cylinder 14 is also fixedly installed. The horizontal piston end of the shift force cylinder 14 is fixedly connected to a cylinder connecting plate 15. A pressure sensor 16 is fixedly installed on the vertical surface of the upper part of the cylinder connecting plate 15 corresponding to the position of the shift head 3. A force measuring rod 17 is fixedly connected to the pressure sensor 16. The force measuring rod 17 faces the shift head 3. The measuring vertical rod 17 and the connecting rod 18 of the horizontal piston end are arranged in parallel. A push block cylinder 19 is fixedly installed on the other vertical surface of the cylinder connecting plate 15. The top piston end of the push block cylinder 19 is fixedly connected to a push block 20. The push block 20 is arranged in the lower area of the workbench surface 1.

[0019] An upper convex block 151 is provided at the top of the cylinder connecting plate 15. A guiding through groove 21 is provided at the position of the workbench surface 1 corresponding to the upper convex block 151. When the shift force cylinder 14 drives the cylinder connecting plate 15 to move horizontally, the upper convex block 151 moves along the guiding through groove 21 to ensure a stable and reliable moving direction;

[0020] The cylinder block of the shift fork groove cylinder 12 is fixedly installed on the third cylinder mounting plate 22. The third cylinder mounting plate 22 is fixedly connected to the corresponding position on the lower surface of the lower cylinder mounting plate 6 through a pair of vertical plates 23. The bottom connecting end of the shift fork groove block 10 is located within the corresponding height area of the vertical plate 23. The top piston connecting block 13 of the shift fork groove cylinder 12 is connected to the bottom connecting end of the shift fork groove block 10.

[0021] A T-shaped groove 24 is provided at the bottom connecting end of the shift fork groove block 10. The top piston connecting block 13 is installed in the T-shaped groove 24, ensuring quick and convenient connection and disassembly.

[0022] A test method for a shift selection mechanism: After fixing the position of the shift selection mechanism, gap tests and shift force tests are respectively carried out to obtain corresponding values.

[0023] The shift selection mechanism is fixed on the upper surface of the workbench through the pressure head of the pressing cylinder. At the same time, after the shift fork penetrates through the avoidance hole and is exposed below the workbench. Then, the shift fork groove cylinder moves to drive the shift fork groove block to rise to the limit position. The shift fork enters the inner groove of the shift fork groove block. Then, the shift fork of the shift selection mechanism starts to move. When the shift fork touches either side of the inner groove, a large current will appear in the motor of the shift selection mechanism. By monitoring the current value, the movement of the shift fork is stopped. The readings of different angle sensors when the shift fork touches both sides of the inner groove are calculated. Combining the width of the inner groove itself and the width of the shift fork, the mechanism gap value is obtained. After the gap test is completed, the shift fork returns to the initial position, and the shift fork groove cylinder resets. Then, the shift force cylinder moves to drive the test rod to move towards the shift fork. When it moves to the limit, the push block cylinder pushes the push block against the workbench surface. The shift selection mechanism moves, and the shift fork hits the end of the test rod. The pressure sensor obtains the corresponding reading as the shift force of the mechanism.

[0024] Reversing the order of the gap test and the shift force test does not affect the final test result.

[0025] The principle is as follows: The gap test and the shift force test are concentrated on one device for operation, so that the shift selection mechanism only needs to be positioned once. And when the shift force test is carried out, the position of the pressure sensor of the force measuring rod is fixed through the push block cylinder, making the value obtained by the side pressure sensor accurate and reliable.

[0026] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0027] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A shift mechanism testing device, characterized in that: It includes a workbench surface, on the upper surface of which there are several upwardly convex positioning pins. The bottom of the shift selector device to be detected is positioned corresponding to the respective positioning pins and supported on the upper surface of the workbench surface. The workbench surface is provided with a through avoidance hole corresponding to the position of the shift lever head. In the detection state, after the shift lever head penetrates through the through avoidance hole, it is exposed below the workbench surface. The upper cylinder mounting plate is fixedly installed directly above the workbench surface through four first columns, and the lower cylinder mounting plate is fixedly installed directly below the workbench surface through four second columns. A pressing cylinder is fixedly installed on the upper cylinder mounting plate, and the lower pressing head of the pressing cylinder faces downward towards the shift selector device to be detected. A square through hole is provided in the lower cylinder mounting plate corresponding to the position of the shift lever head. The upper guiding outer periphery of the shift lever head groove block is embedded in the square through hole. The center of the upper surface of the shift lever head groove block is provided with an inner groove. The bottom connecting end of the shift lever head groove block is connected to the top piston connecting block of the shift lever head groove cylinder. The shift lever head groove cylinder is connected to the corresponding position on the lower surface of the lower cylinder mounting plate through a mounting seat. At the bottom of one end of the lower cylinder mounting plate, a shifting force cylinder is also fixedly provided. The horizontal piston end of the shifting force cylinder is fixedly connected to a cylinder connecting plate. On the vertical surface of the upper part of the cylinder connecting plate corresponding to the position of the shift lever head, a pressure sensor is fixedly provided. A force measuring rod is fixedly connected to the pressure sensor, and the force measuring rod faces the shift lever head. The force measuring rod and the connecting rod of the horizontal piston end are arranged in parallel. On the other vertical surface of the cylinder connecting plate, a pushing block cylinder is fixedly provided. The top piston end of the pushing block cylinder is fixedly connected to a pushing block, and the pushing block is arranged in the lower area of the workbench surface.

2. The shift mechanism testing device according to claim 1, wherein: There is an upwardly convex block on the top of the cylinder connecting plate, and a guiding through groove is provided on the workbench surface corresponding to the position of the upwardly convex block.

3. The testing device for a gear shifting mechanism according to claim 1, characterized in that: The cylinder block of the shift lever head groove cylinder is fixedly installed on a third cylinder mounting plate. The third cylinder mounting plate is fixedly connected to the corresponding position on the lower surface of the lower cylinder mounting plate through a pair of vertical plates. The bottom connecting end of the shift lever head groove block is located in the corresponding height area of the vertical plates, and the top piston connecting block of the shift lever head groove cylinder is connected to the bottom connecting end of the shift lever head groove block.

4. The testing device for a gear shifting mechanism according to claim 1, characterized in that: The bottom connecting end of the shift lever head groove block is provided with a T-shaped groove, and the top piston connecting block is embedded in the T-shaped groove.

5. A testing method for a shift mechanism, which uses a shift mechanism testing device as described in any one of claims 1-4, characterized in that: After fixing the position of the shift mechanism, it respectively conducts clearance tests and shifting force tests to obtain corresponding values; Fix the shift selector mechanism on the upper surface of the workbench through the pressing head of the pressing cylinder. At the same time, after the shifting head penetrates through the through avoidance hole, it is arranged below the workbench surface. Then, the shifting head groove cylinder moves to drive the shifting head groove block to rise to the limit position, and the shifting head enters the inner groove of the shifting head groove block. After that, the shifting head of the shift selector mechanism starts to move. When the shifting head touches any one of the two side walls of the inner groove, a large current will appear in the motor of the shift selector mechanism. Stop the movement of the shifting head by monitoring the current value, calculate the readings of different angle sensors when the shifting head touches the two sides of the inner groove, and obtain the mechanism clearance value by combining the width of the inner groove itself and the width of the shifting head. After the clearance test is completed, the shifting head returns to the initial position, and the shifting head groove cylinder resets. Then, the shifting force cylinder moves to drive the test rod to move towards the shifting head. When it reaches the limit, the push block cylinder pushes the push block against the workbench surface, and the shift selector mechanism moves. The shifting head hits the end of the test rod, and the pressure sensor obtains the corresponding reading as the shifting force of the mechanism.

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