A high-precision detection device for a gearbox assembly

Abstract

The present invention relates to the technical field of transmission detection, and specifically relates to a high-precision detection device for a transmission component, including an installation frame, a shift lever, and a shift fork. The top end of the shift fork is fixedly connected to the shift lever. The rear side of the upper surface of the installation frame is fixedly connected to a fixed plate. Four support mechanisms for providing resistance during the test are arranged in a circumferential array on the front surface of the fixed plate, and a driving mechanism for driving the shift fork to reciprocate back and forth. The driving mechanism drives the shift fork to slide back and forth to simulate the shifting operation. In cooperation with the sliding of the connecting ring on the friction plate, the resistance received during shifting is simulated by the friction plate. The situation of shifting jamming is simulated by the limiting member. During the process of detecting the self-strength of the shift fork, the test conditions can be more in line with the actual use situation, so as to obtain more accurate strength data of the shift fork and facilitate a reasonable judgment on the service life of the shift fork in the subsequent stage.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission detection, and particularly to a high-precision detection device for a transmission assembly. Background Art

[0002] A transmission is a mechanism used to change the rotational speed and torque from the engine. It can fix or shift the transmission ratio between the output shaft and the input shaft. The transmission consists of a transmission mechanism and a control mechanism. Among them, the transmission is divided into an automatic transmission and a manual transmission. Most agricultural machines are equipped with a manual transmission. The working principle of the manual transmission is to shift the gear lever. After the gear lever is shifted to different gears, it corresponds to different shift rods and shift forks. Different gear sets are switched through the shift fork, so as to realize the change of the gear ratio for shifting operations.

[0003] In actual use, when performing a shifting operation, it is necessary to first step on the clutch in place to completely cut off the power transmission between the engine and the transmission before performing the shifting operation. When the operator is not proficient in the shifting operation, there will be an operation of starting to shift without stepping on the clutch in place; sometimes there will also be a situation where the clutch is stepped on in place, but during the shifting process, due to the lack of coordination between hands and feet, the clutch is released before the shifting is completed; at the same time, there will also be an operation of directly shifting without stepping on the clutch; all of the above methods will cause the shift fork to be resisted by the engine power during the shifting process because the engine power is not completely disconnected from the transmission, resulting in resistance when the shift fork moves, and the shift fork itself will receive a reaction force from the resistance, which is likely to damage the shift fork. Therefore, it is necessary to test the strength of the shift fork when producing the shift fork.

[0004] However, the existing detection methods usually directly test the strength of the shift fork. The test method is usually to directly apply different forces to the shift fork, and then comprehensively analyze the deformation amount and damage degree of the shift fork to obtain the strength result of the shift fork. By using this method to detect the strength of the shift fork, the obtained detection result is not comprehensive enough, resulting in inaccurate detection results; when detecting the shift fork by machinery, it cannot fully simulate the force situation of the shift fork during manual operation, resulting in insufficient diversity of the detection results, affecting the judgment of the strength of the shift fork. Summary of the Invention

[0005] Therefore, the present invention provides a high-precision detection device for a transmission assembly, which solves the above technical problems.

[0006] A high-precision detection device for a transmission assembly provided by the present invention includes a mounting frame, a shift lever, and a shift fork. The top end of the shift fork is fixedly connected to the shift lever. The rear side of the upper surface of the mounting frame is fixedly connected to a fixing plate. Four support mechanisms for providing resistance during the test are arranged in a circumferential array on the front surface of the fixing plate. The detection device further includes a driving mechanism for driving the shift fork to reciprocate back and forth. The driving mechanism is arranged at the top end of the mounting frame. The detection device further includes a second adjustment mechanism for adjusting the synchronous movement of the plurality of support mechanisms. The second adjustment mechanism is arranged on the fixing plate. The detection device further includes a first adjustment mechanism for assisting the support mechanism to block the traveling path of the shift fork. The first adjustment mechanism is arranged on the second adjustment mechanism.

[0007] The support mechanism includes a connection slider slidably connected to the front surface of the fixing plate. The front surface of the connection slider is fixedly connected to an arc-shaped plate. A friction plate is fixedly installed on the front end of the outer arc surface of the arc-shaped plate by a first limit bolt. A limiting member is arranged on the arc-shaped plate and behind the friction plate.

[0008] The limiting member includes a positioning seat fixedly connected to the inner arc surface of the arc-shaped plate and arranged in the left-right direction. An auxiliary plate is hinged on the positioning seat. The hinge point between the positioning seat and the auxiliary plate is located at the center of the auxiliary plate. A through groove adapted to the auxiliary plate is arranged on the arc-shaped plate. A torsion spring is arranged between the auxiliary plate and the positioning seat for keeping the auxiliary plate and the arc-shaped plate coaxial when the auxiliary plate is not stressed. Two symmetrical arc-shaped push blocks are fixedly connected to the inner arc surface of the auxiliary plate and on the front and rear sides of the positioning seat.

[0009] According to an embodiment of the present invention, the first adjustment mechanism includes an adjustment rod slidably connected back and forth on the second adjustment mechanism. An elastic telescopic limit seat is fixedly connected to the circumferential surface of the adjustment rod. One end of the elastic telescopic limit seat away from the axis of the adjustment rod is spherical. A pushing member is arranged on the rear side of the circumferential surface of the elastic telescopic limit seat.

[0010] According to an embodiment of the present invention, the pushing member includes a plurality of first connecting pieces fixedly connected to the circumferential surface of the adjustment rod and distributed in a circumferential manner. A pushing disk is fixedly connected to the side of the plurality of first connecting pieces away from the axis of the adjustment rod. Four auxiliary rollers are rotatably connected to the circumferential surface of the pushing disk and are evenly distributed. The four auxiliary rollers correspond to the four auxiliary plates one by one. The auxiliary roller is in arc sliding fit with the arc surface of its corresponding arc-shaped push block. A limiting sliding seat arranged in the front-rear direction is fixedly connected to the inner arc surface of the arc-shaped plate. The limiting sliding seat is slidably connected to the pushing disk back and forth.

[0011] According to an embodiment of the present invention, the second adjusting mechanism includes a limit clamping seat fixedly connected to the rear surface of the fixing plate. A connecting shaft rod is rotatably connected inside the limit clamping seat. The limit clamping seat is provided with a second limit bolt for limiting the connecting shaft rod thereon. The front end of the connecting shaft rod penetrates to the front side of the fixing plate and is rotatably connected to the fixing plate. The front end of the connecting shaft rod is fixedly connected with a connecting cylinder. Two gears distributed front and rear are fixedly connected to the outer circumferential surface of the connecting cylinder. Two groups of racks distributed front and rear are engaged with the gears. The number of each group of racks is two and they are symmetrically arranged with the center of the gear as the reference. The two groups of racks are perpendicular to each other. A limit connecting rod is slidably connected to the rack. The four racks correspond to four arc-shaped plates one by one. The end of the rack far from the limit connecting rod is fixedly connected to the inner arc surface of its corresponding arc-shaped plate. The end of the limit connecting rod far from the rack is fixedly connected to its corresponding arc-shaped plate.

[0012] According to an embodiment of the present invention, the driving mechanism includes a mechanical driving member arranged on the left side at the top of the installation frame, a manual driving member arranged on the right side at the top of the installation frame, and an adjusting member arranged between the mechanical driving member and the manual driving member at the top of the installation frame.

[0013] According to an embodiment of the present invention, the mechanical driving member includes two second connecting pieces symmetrically arranged front and rear and fixedly connected to the installation frame. A lead screw is rotatably connected to the opposite surfaces of the two second connecting pieces. A driving motor is fixedly installed on the rear surface of the rear second connecting piece. The output shaft of the driving motor penetrates the second connecting piece and is fixedly connected to the rear end of the lead screw. A limit sliding rod is fixedly connected to the opposite surfaces of the two second connecting pieces and below the lead screw. A first slider is threadedly connected to the lead screw. The bottom end of the first slider is slidably connected to the limit sliding rod in the front and rear directions.

[0014] According to an embodiment of the present invention, the adjusting member includes an installation sliding seat fixedly connected to the installation frame and arranged in the front and rear directions. Two clamping seats are slidably connected to the installation sliding seat in the front and rear directions. A fixed sleeve is fixedly connected to the front surface of the front clamping seat. A plug rod is slidably connected to the inside of the fixed sleeve in the left and right directions. An adjusting handle is slidably connected to the front surface of the fixed sleeve in the left and right directions. The rear side of the adjusting handle is fixedly connected to the plug rod at the connection position with the fixed sleeve and penetrates to the inside of the fixed sleeve.

[0015] According to an embodiment of the present invention, clamping holes adapted to the shift lever are formed on the opposite surfaces of the two clamping seats. The clamping seat is provided with a plurality of elastic telescopic limit rods for limiting the shift lever after the shift lever is inserted into the clamping seat. The telescopic end of the elastic telescopic limit rod penetrates to the inside of the clamping seat. The front clamping seat is provided with a third limit bolt for locking the shift lever inside the clamping seat.

[0016] According to an embodiment of the present invention, the manual drive member includes a connecting slide fixedly connected to the mounting frame and distributed in the front-to-back direction, a second slider is slidably connected to the connecting slide, and a pushing handle is fixedly connected to the right side of the second slider.

[0017] According to an embodiment of the present invention, an auxiliary mechanism is commonly provided on the front surface of the fixed plate and the mounting frame, and the auxiliary mechanism includes a mounting slide fixedly connected to the upper surface of the mounting frame, the rear side of the mounting slide is fixedly connected to the front surface of the fixed plate, and a clamping block is connected to the mounting slide for forward and backward sliding, and a connecting ring is clamped on the clamping block, and the connecting ring is clamped with the bottom end of the fork.

[0018] The technical solution of the present invention is as follows: 1. The driving mechanism drives the shift fork to slide back and forth to simulate the gear shifting operation, and the connecting ring slides on the friction plate. The friction plate simulates the resistance encountered during the gear shifting, and the limit piece simulates the gear shifting jam. In the process of testing the strength of the shift fork itself, the test conditions can be more in line with the actual usage conditions, so as to obtain more accurate strength data of the shift fork, which is convenient for making reasonable judgments on the service life of the shift fork later.

[0019] 2. Through the setting of the manual drive part, you can choose to manually push the test during the test, so that the test results are more comprehensive. With the setting of the adjustment part, you can freely switch to use the mechanical drive part or the manual drive part to perform strength test on the fork.

[0020] 3. Through the setting of the supporting mechanism, the test method for the strength test of the fork can be selected according to the needs. The fork can be subjected to a sliding test with resistance or a blocking test, so as to simulate the strength of the fork under stress in different situations, diversify the detection methods, and improve the comprehensiveness of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the high-precision detection device for a gearbox assembly provided by the present invention.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the shift rod and the shift fork provided by the present invention in cooperation with the connecting ring.

[0024] Figure 3It is a schematic perspective view of the mounting frame provided by the present invention.

[0025] Figure 4 It is a schematic perspective view of the auxiliary mechanism provided by the present invention.

[0026] Figure 5 It is a schematic perspective view of the driving mechanism provided by the present invention.

[0027] Figure 6 It is a schematic perspective view of the mechanical driving member, adjusting member and manual driving member provided by the present invention.

[0028] Figure 7 It is a schematic perspective view of switching to the driving of the manual driving member provided by the present invention.

[0029] Figure 8 It is a schematic perspective view of switching to the driving of the mechanical driving member provided by the present invention.

[0030] Figure 9 It is one of the schematic perspective views of the first adjusting mechanism and the second adjusting mechanism provided by the present invention.

[0031] Figure 10 It is another schematic perspective view of the first adjusting mechanism and the second adjusting mechanism provided by the present invention.

[0032] Figure 11 It is a schematic perspective view of the pushing member and the limiting member provided by the present invention.

[0033] Figure 12 It is provided by the present invention Figure 11 An enlarged view of part A in

[0034] Figure 13 It is a right side cross-sectional view of the adjusting rod and the connecting cylinder provided by the present invention.

[0035] Figure 14 It is a schematic view of the state of the auxiliary plate with a larger front opening and a smaller rear opening provided by the present invention.

[0036] Figure 15 It is a schematic view of the state of the auxiliary plate with a smaller front opening and a larger rear opening provided by the present invention.

[0037] Reference numerals:

[0038] 1. Installation frame; 2. First adjustment mechanism; 3. Second adjustment mechanism; 4. Fixed plate; 5. Support mechanism; 6. Driving mechanism; 7. Auxiliary mechanism; 21. Adjusting rod; 22. Elastic telescopic limit seat; 23. Pushing member; 31. Rack; 32. Limit connecting rod; 33. Connecting cylinder; 34. Gear; 35. Limit clamping seat; 36. Connecting shaft rod; 51. Connecting slider; 52. Arc-shaped plate; 53. Friction plate; 54. Limiting member; 61. Mechanical driving member; 62. Adjusting member; 63. Manual driving member; 71. Installation sliding frame; 72. Clamping block; 73. Connecting ring; 231. Pushing disk; 232. Limit sliding seat; 233. Auxiliary roller; 234. First connecting piece; 541. Arc-shaped pushing block; 542. Auxiliary plate; 543. Positioning seat; 611. First slider; 612. Lead screw; 613. Second connecting piece; 614. Driving motor; 615. Limit sliding rod; 621. Clamping seat; 622. Installation sliding seat; 623. Inserting rod; 624. Fixed sleeve; 625. Adjusting handle; 631. Second slider; 632. Connecting sliding seat; 633. Pushing handle; 100. Poking rod; 200. Fork. Detailed implementation manners

[0039] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0040] As Figure 1 、 Figure 2 and Figure 3 shown, a high-precision detection device for a gearbox assembly includes an installation frame 1, a poking rod 100 and a fork 200. The top end of the fork 200 is fixedly connected to the poking rod 100. A fixed plate 4 is fixedly connected to the rear side of the upper surface of the installation frame 1. Four support mechanisms 5 for providing resistance during the test are arranged in a circumferential array on the front surface of the fixed plate 4. The detection device further includes a driving mechanism 6 for driving the fork 200 to reciprocate back and forth. The driving mechanism 6 is arranged at the top end of the installation frame 1. The detection device further includes a second adjustment mechanism 3 for adjusting the synchronous movement of the plurality of support mechanisms 5. The second adjustment mechanism 3 is arranged on the fixed plate 4. The detection device further includes a first adjustment mechanism 2 for assisting the support mechanism 5 to block the traveling path of the fork 200. The first adjustment mechanism 2 is arranged on the second adjustment mechanism 3.

[0041] As Figure 1 and Figure 4As shown, an auxiliary mechanism 7 is jointly provided on the front surface of the fixed plate 4 and the mounting frame 1. The auxiliary mechanism 7 includes a mounting carriage 71 fixedly connected to the upper surface of the mounting frame 1. The rear side of the mounting carriage 71 is fixedly connected to the front surface of the fixed plate 4. A clamping block 72 is slidably connected to the mounting carriage 71 in the front-rear direction. A connecting ring 73 is clamped on the clamping block 72. The connecting ring 73 is clamped and matched with the bottom end of the fork 200.

[0042] As Figure 1 and Figure 5 shown, the driving mechanism 6 includes a mechanical driving member 61 provided on the left side of the top end of the mounting frame 1. A manual driving member 63 is provided on the right side of the top end of the mounting frame 1. An adjusting member 62 is provided at the top end of the mounting frame 1 and between the mechanical driving member 61 and the manual driving member 63.

[0043] As Figure 5 、 Figure 6 、 Figure 7 and Figure 8 shown, the adjusting member 62 includes a mounting slide 622 fixedly connected to the mounting frame 1 and arranged in the front-rear direction. Two clamping seats 621 are slidably connected to the mounting slide 622 in the front-rear direction. A fixing sleeve 624 is fixedly connected to the front surface of the front clamping seat 621. A plug rod 623 is slidably connected to the inside of the fixing sleeve 624 in the left-right direction. An adjusting handle 625 is slidably connected to the front surface of the fixing sleeve 624. The connection position of the adjusting handle 625 and the fixing sleeve 624 penetrates into the inside of the fixing sleeve 624 and is fixedly connected to the plug rod 623. Clamping holes adapted to the lever 100 are formed on the opposite surfaces of the two clamping seats 621. A plurality of elastic telescopic limiting rods for limiting the lever 100 after the lever 100 is inserted into the clamping seat 621 are provided on the clamping seat 621. The telescopic end of the elastic telescopic limiting rod penetrates into the inside of the clamping seat 621. A third limiting bolt for locking the lever 100 inside the clamping seat 621 is provided on the front clamping seat 621.

[0044] During specific use, first slide the clamping block 72 to the front end of the mounting carriage 71, then take a new connecting ring 73 and clamp it on the clamping block 72. At this time, clamp the bottom end of the fork 200 on the connecting ring 73. At the same time, adjust the positions of the two clamping seats 621 on the mounting slide 622 according to the positions of the front and rear ends of the lever 100, respectively clamp the two clamping seats 621 on the front and rear ends of the lever 100, and make the front clamping seat 621 and the front end of the lever 100 remain relatively fixed through the third limiting bolt. Then, according to the test requirements, adjust the position of the plug rod 623 on the fixing sleeve 624 through the adjusting handle 625 to select whether to push the fork 200 to move by the manual driving member 63 or the mechanical driving member 61.

[0045] As Figure 5 、 Figure 6 、Figure 7 and Figure 8 As shown in Figure 8 , the mechanical driving member 61 includes two symmetric second connecting pieces 613 fixedly connected to the mounting frame 1 in the front and back. A lead screw 612 is rotatably connected to the opposite surfaces of the two second connecting pieces 613. A driving motor 614 is fixedly installed on the rear surface of the rear second connecting piece 613. The output shaft of the driving motor 614 penetrates through the second connecting piece 613 and is fixedly connected to the rear end of the lead screw 612. A limiting slide bar 615 is fixedly connected to the opposite surfaces of the two second connecting pieces 613 and below the lead screw 612. A first slider 611 is threadedly connected to the lead screw 612. The bottom end of the first slider 611 is slidably connected to the limiting slide bar 615 in the front and back directions.

[0046] As Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown in Figure 7 , Figure 8 , the manual driving member 63 includes connecting sliding seats 632 fixedly connected to the mounting frame 1 and distributed in the front and back directions. A second slider 631 is slidably connected to the connecting sliding seat 632 in the front and back directions. A pushing handle 633 is fixedly connected to the right side surface of the second slider 631. Connecting holes penetrating left and right and adapted to the inserting rod 623 are formed on both the first slider 611 and the second slider 631.

[0047] During specific use, first, the positions of the first slider 611, the second slider 631, and the inserting rod 623 are adjusted to be aligned. When the inserting rod 623 is pushed leftward by the adjusting handle 625, the left end of the inserting rod 623 is inserted into the connecting hole on the first slider 611. The driving motor 614 drives the lead screw 612 to rotate and cooperate with the limiting slide bar 615 to make the first slider 611 move in the front and back directions. The inserting rod 623 cooperates with the clamping seat 621 to drive the dial rod 100 and the fork 200 to move in the front and back directions. When the inserting rod 623 is pushed leftward by the adjusting handle 625 and the left end of the inserting rod 623 is inserted into the connecting hole on the first slider 611, at this time, the staff needs to manually push the pushing handle 633, and the second slider 631 cooperates with the clamping seat 621 to drive the dial rod 100 and the fork 200 to move in the front and back directions.

[0048] As Figure 1 and Figure 9 As shown in Figure 1 , Figure 9 , the supporting mechanism 5 includes a connecting slider 51 slidably connected to the front surface of the fixing plate 4. The front surface of the connecting slider 51 is fixedly connected with an arc-shaped plate 52. A friction plate 53 is fixedly installed on the front end of the outer arc surface of the arc-shaped plate 52 by a first limiting bolt. A limiting member 54 is arranged on the arc-shaped plate 52 and behind the friction plate 53.

[0049] As Figure 1 , Figure 9 and Figure 10As shown in the figure, the second adjusting mechanism 3 includes a limit card seat 35 fixedly connected to the rear surface of the fixed plate 4. A connecting shaft rod 36 is rotatably connected inside the limit card seat 35. A second limit bolt for limiting the connecting shaft rod 36 thereon is provided on the limit card seat 35. The front end of the connecting shaft rod 36 penetrates to the front side of the fixed plate 4 and is rotatably connected to the fixed plate 4. A connecting cylinder 33 is fixedly connected to the front end of the connecting shaft rod 36. Two gears 34 distributed front and rear are fixedly connected to the outer circumferential surface of the connecting cylinder 33. Two groups of racks 31 distributed front and rear are engaged with the gears 34. The number of each group of racks 31 is two and they are symmetrically arranged with the center of the gear 34 as the reference. The two groups of racks 31 are perpendicularly arranged. A limit connecting rod 32 is slidably connected to the rack (31). The four racks 31 correspond to the four arc-shaped plates 52 one by one. The end of the rack 31 far from the limit connecting rod 32 is fixedly connected to the inner arc surface of its corresponding arc-shaped plate 52. The end of the limit connecting rod 32 far from the rack 31 is fixedly connected to its corresponding arc-shaped plate 52.

[0050] As Figure 9 , Figure 11 and Figure 12 As shown in the figure, the limiting member 54 includes a positioning seat 543 fixedly connected to the inner arc surface of the arc-shaped plate 52 and arranged in the left-right direction. An auxiliary plate 542 is hinged to the positioning seat 543. The hinge point of the positioning seat 543 and the auxiliary plate 542 is located at the center of the auxiliary plate 542. A through groove adapted to the auxiliary plate 542 is provided on the arc-shaped plate 52. A torsion spring for keeping the auxiliary plate 542 and the arc-shaped plate 52 coaxial when the auxiliary plate 542 is not stressed is provided between the auxiliary plate 542 and the positioning seat 543. Two symmetric arc-shaped push blocks 541 are fixedly connected to the inner arc surface of the auxiliary plate 542 and on the front and rear sides of the positioning seat 543.

[0051] As Figure 1 and Figure 9 As shown in the figure, the first adjusting mechanism 2 includes an adjusting rod 21 slidably connected front and rear inside the connecting cylinder 33. An elastic telescopic limit seat 22 is fixedly connected by embedding on the circumferential surface of the adjusting rod 21. The end of the elastic telescopic limit seat 22 far from the axis of the adjusting rod 21 is spherical. Three clamping holes adapted to the spherical end of the elastic telescopic limit seat 22 are opened on the circumferential surface of the connecting cylinder 33. A pushing member 23 is arranged on the rear side of the circumferential surface of the elastic telescopic limit seat 22.

[0052] As Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13As shown, the pusher 23 includes a plurality of first connecting pieces 234 that are fixedly connected to the circumferential surface of the adjusting rod 21 and are circumferentially distributed. One side of the first connecting piece 234 away from the axis of the adjusting rod 21 penetrates to the outside of the connecting cylinder 33 and is slidably connected to the connecting cylinder 33 in the front and rear directions. A pushing disk 231 is fixedly connected to the sides of the plurality of first connecting pieces 234 away from the axis of the adjusting rod 21. Four uniformly distributed auxiliary rollers 233 are rotatably connected to the circumferential surface of the pushing disk 231. The four auxiliary rollers 233 correspond to the four auxiliary plates 542 one by one. The auxiliary roller 233 is in sliding fit with the arc surface of its corresponding arc-shaped pushing block 541. A limiting sliding seat 232 arranged in the front and rear directions is fixedly connected to the inner arc surface of the arc-shaped plate 52. The limiting sliding seat 232 is slidably connected to the pushing disk 231 in the front and rear directions.

[0053] During specific use, different test conditions are adjusted before the test according to the test requirements. When it is necessary to simulate the situation of shifting gears without fully depressing the clutch, at this time, the connecting cylinder 33 is rotated to drive the gear 34 to rotate. The gear 34 cooperates with the rack 31 to push the four arc-shaped plates 52 to fit outwardly on the inner circumferential surface of the connecting ring 73 synchronously. At the same time, the connecting slider 51 is driven to slide on the fixing plate 4. The arrangement of the limiting connecting rod 32 can make the four arc-shaped plates 52 move synchronously. By installing a friction plate 53 with appropriate friction force on the arc-shaped plate 52 and making the friction plate 53 remain relatively fixed with respect to the arc-shaped plate 52 through the first limiting bolt, at this time, according to the friction force generated by the friction plate 53 on the connecting ring 73, the strength of the shift fork 200 when sliding with resistance during the sliding process is detected. The connecting shaft rod 36 and the limiting clamping seat 35 are kept relatively fixed through the second limiting bolt. At this time, the connecting cylinder 33 remains stationary to ensure that after the position adjustment of the arc-shaped plate 52 is completed, when the arc-shaped plate 52 is stressed, the rack 31 on the arc-shaped plate 52 remains stationary on the gear 34, so that the arc-shaped plate 52 remains stationary, enabling the friction plate 53 to play a normal friction role and the auxiliary plate 542 to play a normal limiting role.

[0054] When it is necessary to simulate the situation of the clutch becoming loose during the shifting process, first, the first limiting bolt is loosened to remove the friction plate 53 from the arc-shaped plate 52. Then, a backward thrust is applied to the adjusting rod 21, and the elastic telescopic limiting seat 22 is clamped into the innermost clamping hole of the connecting cylinder 33. The pushing disk 231 is pushed to slide backward through the cooperation of the adjusting rod 21 and the first connecting piece 234. At this time, the pushing disk 231 slides on the limiting sliding seat 232 so that the pushing disk 231 slides along the axis direction of the arc-shaped plate 52. When the pushing disk 231 slides backward, the auxiliary roller 233 on it slides along the arc surface of the arc-shaped pushing block 541 on the rear side of the auxiliary plate 542. At this time, the auxiliary roller 233 generates a thrust on the arc-shaped pushing block 541 on the rear side of the auxiliary plate 542, making the opening of the auxiliary plate 542 smaller in the front and larger in the rear (as Figure 15As shown in the figure, when the fork 200 drives the connecting ring 73 to slide and passes through the auxiliary plate 542, it will suddenly be blocked, and the intensity of the sudden block of the fork 200 during the sliding process is detected.

[0055] It should be noted that when the connecting cylinder 33 rotates, at this time, the connecting cylinder 33 drives the adjusting rod 21 to rotate synchronously. At this time, the adjusting rod 21 drives the first connecting piece 234 to rotate on the pushing disk 231, and the first connecting piece 234 remains stationary.

[0056] When it is necessary to simulate the situation of shifting gears without stepping on the clutch, at this time, a forward pulling force is applied to the adjusting rod 21, and the elastic telescopic limit seat 22 is clamped in the frontmost clamping hole on the connecting cylinder 33. At this time, the auxiliary roller 233 generates a thrust on the front arc-shaped push block 541 on the auxiliary plate 542, making the opening of the auxiliary plate 542 larger at the front and smaller at the rear (as Figure 14 shown in the figure). When the fork 200 slides to the front end position of the auxiliary plate 542 during the sliding process, the fork 200 will be limited, and the strength of the fork 200 under the condition of sudden limitation during the sliding process is detected.

[0057] According to the needs, the fork 200 is subjected to strength tests under the above different conditions, and then the parallelism of the front and rear surfaces of the tested fork 200 is detected for deformation, and at the same time, whether there are damages on the surface and inside of the fork 200 is detected. Based on the deformation and damage detection results of the fork 200, the strength of the fork 200 is comprehensively analyzed in combination with the test conditions.

[0058] Working principle: In specific use, first, the bottom end of the fork 200 is clamped on the connecting ring 73, then the lever 100 is installed on the adjusting member 62, and then the adjusting member 62 is used to select whether to use the manual driving member 63 or the mechanical driving member 61 to push the fork 200 to move towards the direction close to the adjusting arc plate 52. At this time, the position of the arc plate 52 is adjusted through the connecting cylinder 33, so that the arc plate 52 fits on the inner circumferential surface of the connecting ring 73. At the same time, different friction plates 53 can be selected to provide different degrees of frictional force, and the strength test is carried out under the condition that the fork 200 slides with resistance. The inclination direction of the auxiliary plate 542 can also be adjusted through the adjusting rod 21 in cooperation with the pushing member 23. When the opening of the auxiliary plate 542 is smaller at the front and larger at the rear, the strength of the fork 200 when suddenly encountering resistance during sliding can be tested. When the opening of the auxiliary plate 542 is larger at the front and smaller at the rear, the strength of the fork 200 when being blocked during sliding can be tested. According to the needs, the fork 200 is subjected to strength tests under different conditions, and then the parallelism of the front and rear surfaces of the tested fork 200 is detected for deformation, and at the same time, whether there are damages on the surface and inside of the fork 200 is detected. Based on the deformation and damage detection results of the fork 200, the strength of the fork 200 is comprehensively analyzed in combination with the test conditions.

[0059] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0060] In addition, terms such as "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0061] In the present invention, unless otherwise clearly specified and limited, terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A high-precision detection device for a transmission assembly, characterized in that: It includes an installation frame, a shift lever and a shift fork. The top end of the shift fork is fixedly connected to the shift lever. The rear side of the upper surface of the installation frame is fixedly connected to a fixed plate. Four support mechanisms for providing resistance during the test are arranged in a circumferential array on the front surface of the fixed plate. A driving mechanism for driving the shift fork to move back and forth, and the driving mechanism is arranged at the top end of the installation frame. A second adjustment mechanism for adjusting the synchronous movement of multiple support mechanisms, and the second adjustment mechanism is arranged on the fixed plate. A first adjustment mechanism for assisting the support mechanism to block the travel path of the shift fork, and the first adjustment mechanism is arranged on the second adjustment mechanism. The support mechanism includes a connection slider slidably connected to the front surface of the fixed plate. The front surface of the connection slider is fixedly connected to an arc-shaped plate. A friction plate is fixedly installed on the front end of the outer arc surface of the arc-shaped plate by a first limit bolt. A limiting member is arranged on the arc-shaped plate and behind the friction plate. The limiting member includes a positioning seat fixedly connected to the inner arc surface of the arc-shaped plate and arranged in the left-right direction. An auxiliary plate is hinged on the positioning seat. The hinge point between the positioning seat and the auxiliary plate is located at the center of the auxiliary plate. A through groove adapted to the auxiliary plate is arranged on the arc-shaped plate. A torsion spring is arranged between the auxiliary plate and the positioning seat for keeping the auxiliary plate and the arc-shaped plate coaxial when the auxiliary plate is not stressed. Two symmetrical arc-shaped push blocks are fixedly connected to the inner arc surface of the auxiliary plate and on the front and rear sides of the positioning seat.

2. The high-precision detection device for a gearbox assembly according to claim 1, wherein: The first adjustment mechanism includes an adjustment rod slidably connected to the second adjustment mechanism in the front-rear direction. An elastic telescopic limit seat is fixedly connected to the circumferential surface of the adjustment rod. One end of the elastic telescopic limit seat away from the axis of the adjustment rod is spherical. A pushing member is arranged on the rear side of the circumferential surface of the elastic telescopic limit seat.

3. The high-precision detection device for a gearbox assembly according to claim 2, characterized in that: The pushing member includes a plurality of first connecting pieces fixedly connected to the circumferential surface of the adjustment rod and distributed in a circumferential manner. The common fixed connection of the sides of the plurality of first connecting pieces away from the axis of the adjustment rod is a pushing disk. Four uniformly distributed auxiliary rollers are rotatably connected to the circumferential surface of the pushing disk. The auxiliary rollers correspond to the auxiliary plates. The auxiliary rollers are in sliding fit with the arc surfaces of the corresponding arc-shaped push blocks. A limiting slide seat arranged in the front-rear direction is fixedly connected to the inner arc surface of the arc-shaped plate. The limiting slide seat is in sliding connection with the pushing disk in the front-rear direction.

4. The high-precision detection device for a gearbox assembly according to claim 1, wherein: The second adjustment mechanism includes a limit card seat fixedly connected to the rear surface of the fixed plate. A connecting shaft rod is rotatably connected inside the limit card seat. The limit card seat is provided with a second limit bolt for limiting the connecting shaft rod thereon. The front end of the connecting shaft rod penetrates to the front side of the fixed plate and is rotatably connected to the fixed plate. The front end of the connecting shaft rod is fixedly connected with a connecting cylinder. Two gears distributed front and rear are fixedly connected to the outer circumferential surface of the connecting cylinder. Two groups of racks distributed front and rear are engaged with the gears. The number of each group of racks is two and they are symmetrically arranged with the center of the gear as the reference. The two groups of racks are perpendicularly arranged. A limit connecting rod is slidably connected to the rack. The rack corresponds to the arc-shaped plate. The end of the rack away from the limit connecting rod is fixedly connected to the inner arc surface of its corresponding arc-shaped plate. The end of the limit connecting rod away from the rack is fixedly connected to its corresponding arc-shaped plate.

5. The high-precision detection device for a gearbox assembly according to claim 1, characterized in that: The driving mechanism includes a mechanical driving member arranged on the left side at the top of the installation frame, a manual driving member arranged on the right side at the top of the installation frame, and an adjustment member arranged between the mechanical driving member and the manual driving member at the top of the installation frame.

6. The high-precision detection device for a gearbox assembly according to claim 5, characterized in that: The mechanical driving member includes two second connecting pieces symmetrically arranged front and rear and fixedly connected to the installation frame. A lead screw is rotatably connected to the opposite surfaces of the two second connecting pieces. A driving motor is fixedly installed on the rear surface of the rear second connecting piece. The output shaft of the driving motor penetrates the second connecting piece and is fixedly connected to the rear end of the lead screw. A limit sliding rod is fixedly connected to the opposite surfaces of the two second connecting pieces and below the lead screw. A first slider is threadedly connected to the lead screw. The bottom end of the first slider is slidably connected to the limit sliding rod in the front and rear directions.

7. The high-precision detection device for a gearbox assembly according to claim 5, characterized in that: The adjustment member includes an installation sliding seat fixedly connected to the installation frame and arranged in the front and rear directions. Two clamping seats are slidably connected to the installation sliding seat in the front and rear directions. A fixed sleeve is fixedly connected to the front surface of the front clamping seat. A plug rod is slidably connected to the inside of the fixed sleeve in the left and right directions. An adjustment handle is slidably connected to the front surface of the fixed sleeve in the left and right directions. The rear side of the adjustment handle is fixedly connected to the plug rod at the connection position with the fixed sleeve and penetrates to the inside of the fixed sleeve.

8. The high-precision detection device for a gearbox assembly according to claim 7, characterized in that: Card holes adapted to the shift lever are formed on the opposite surfaces of the two clamping seats. A plurality of elastic telescopic limit rods for limiting the shift lever after the shift lever is inserted into the clamping seat are arranged on the clamping seat. The telescopic end of the elastic telescopic limit rod penetrates to the inside of the clamping seat. A third limit bolt for locking the shift lever inside the clamping seat is arranged on the front clamping seat.

9. A high-precision detection device for a transmission assembly according to claim 5, characterized in that: The manual driving member includes a connection sliding seat fixedly connected to the installation frame and distributed in the front and rear directions. A second slider is slidably connected to the connection sliding seat in the front and rear directions. A pushing handle is fixedly connected to the right side surface of the second slider.

10. The high-precision detection device for a gearbox assembly according to claim 1, wherein: An auxiliary mechanism is jointly provided on the front surface of the fixed plate and the mounting frame. The auxiliary mechanism includes a mounting slide fixed to the upper surface of the mounting frame. The rear side of the mounting slide is fixedly connected to the front surface of the fixed plate. A clamping block is slidably connected back and forth on the mounting slide. A connecting ring is clamped on the clamping block. The connecting ring is clamped and matched with the bottom end of the fork.

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