Device for measuring gap between driving tooth and driven tooth and torque

Abstract

The utility model discloses a driving and driven tooth gap and torque measuring device, which comprises a sliding table assembly and a detection assembly, and is characterized in that the sliding table assembly comprises a first sliding table assembly and a second sliding table assembly which are symmetrically arranged along a first direction, and the first sliding table assembly and the second sliding table assembly are respectively used for fixing two ends of an axle; the detection assembly is located between the first sliding table assembly and the second sliding table assembly, the detection assembly is used for being connected with a driving gear input shaft of the axle so as to measure a driving gear and driven gear gap and the transmission torque of the driving gear input shaft, and the detection assembly comprises an axle housing fixing mechanism; the axle housing fixing mechanism is used for fixing the middle area of the axle. The axle housing can be automatically fixed, the axle housing can be in butt joint with the main gear input shaft of the main speed reducer in the axle housing to measure the rotation torque of the main speed reducer, and the gap between the driving bevel gear and the driven bevel gear of the main speed reducer can be automatically measured. The inconvenience of manual detection is avoided, and the detection efficiency and the measurement precision are improved.

Description

Technical Field

[0001] This application relates to the field of speed reducer testing technology, and in particular to a device for measuring the backlash and torque of the gear teeth. Background Technology

[0002] The reducer contains multiple pairs of gears that mesh with each other, achieving a reduction in speed and an increase in torque through gear transmission. Due to the high input shaft speed, to ensure the working accuracy, appropriate vibration and noise levels, reliability, and service life of the gears, it is necessary to inspect the gear meshing state and bearing preload, thereby ensuring the assembly quality of the reducer. Passenger vehicles have a dedicated main reducer assembly, which facilitates inspection. However, the main reducer in commercial vehicles is integrated into the axle housing, whose outer walls are unmachined, making fixation difficult. Therefore, the detection of backlash and torque in the main gear is done manually, resulting in low accuracy and efficiency. Utility Model Content

[0003] The gear backlash and torque measuring device provided in this application can automatically fix the axle housing and connect with the main gear input shaft of the main reducer inside the axle housing to measure its rotational torque. It can also automatically measure the backlash between the driving and driven bevel gears of the main reducer. This eliminates the inconvenience of manual inspection and improves inspection efficiency and measurement accuracy.

[0004] An embodiment of this application provides a device for measuring the clearance and torque of the primary gear and secondary gear, including a slide assembly and a detection assembly. The slide assembly includes a first slide assembly and a second slide assembly symmetrically arranged along a first direction, which are respectively used to fix both ends of an axle. The detection assembly is located between the first and second slide assemblies and is used to connect to the primary gear input shaft of the axle to measure the clearance between the primary and secondary gears and the transmission torque of the primary gear input shaft. The detection assembly includes an axle housing fixing mechanism for fixing the middle region of the axle.

[0005] The main gear backlash and torque measuring device of this application can fix the axle housing from three positions: both ends and the middle position of the axle. Specifically, the first slide assembly and the second slide assembly approach the axle housing respectively and extend into the axle housing through the first and second openings, aligning with the spline holes at both ends of the differential inside the axle housing to achieve fixation of the axle in the first direction. The axle housing fixing mechanism of the detection assembly fixes the third opening, and the detection assembly aligns with the main gear input shaft to achieve fixation of the axle in the second direction. Then, the main gear backlash and torque of the final drive are measured, avoiding the inconvenience of manual inspection and the inaccuracy of measurement data.

[0006] In one embodiment, the bridge housing fixing mechanism includes a positioning plate, a first positioning fixture, and an indexing pin. The positioning plate has a first through hole, the first positioning fixture is installed on the inner wall of the first through hole, and the indexing pin is installed on the outer periphery of the positioning plate. The first positioning fixture has a second through hole, and the axial direction of the first through hole and the second through hole is a second direction, which is perpendicular to the first direction.

[0007] In one embodiment, the detection assembly further includes a shaft fixing mechanism and a servo motor arranged and connected in a driving manner along the second direction. The shaft fixing mechanism is used to connect the end of the main gear input shaft, and the servo motor is used to drive the shaft fixing mechanism to rotate so as to drive the main gear input shaft to rotate. The main gear input shaft extends along the second direction.

[0008] In one embodiment, the shaft fixing mechanism includes a plurality of jaws and a pneumatic chuck. The plurality of jaws are mounted on the pneumatic chuck, and a clamping space for clamping the main gear input shaft is formed between the plurality of jaws. The pneumatic chuck is used to drive the plurality of jaws to retract to clamp the main gear input shaft; or the pneumatic chuck is used to drive the jaws to open to release the main gear input shaft.

[0009] In one embodiment, the detection assembly further includes a coupling, a torque limiter, and a torque sensor connected sequentially along the second direction, wherein the coupling, the torque limiter, and the torque sensor are disposed between the servo motor and the shaft fixing mechanism.

[0010] In one embodiment, the detection assembly further includes a housing and a fixed bracket. The coupling, the torque limiter, and the torque sensor are disposed inside the housing. The shaft fixing mechanism and the servo motor are respectively installed on both sides of the housing. One end of the fixed bracket is connected to the housing, and the other end is connected to the axle housing fixing mechanism. The shaft fixing mechanism is located between the axle housing fixing mechanism and the housing.

[0011] In one embodiment, the detection component further includes an angle adjustment mechanism, which is fixedly installed on the top of the housing. The angle adjustment mechanism includes a horizontal adjustment component, which includes a first rotating shaft, a bearing, a bearing seat, and a positioning pin. The bearing is installed inside the bearing seat, and the positioning pin is installed on the outer wall of the bearing seat. The first rotating shaft is installed at one end of the bearing seat, and the other end of the bearing seat is fixedly connected to the housing. The bearing seat and the first rotating shaft are coaxially arranged with the axial direction of the third direction. The third direction, the second direction, and the first direction are perpendicular to each other. The housing can rotate around the first rotating shaft. The edge of the first rotating shaft has a fan-shaped notch, and the positioning pin extends into the notch. The fan-shaped notch is used to limit the movement range of the positioning pin, and the positioning pin is perpendicular to the third direction.

[0012] In one embodiment, the angle adjustment mechanism further includes a vertical adjustment component, which is arranged along the third direction with the horizontal adjustment component. The vertical adjustment component includes a transition plate, an upper swing seat, a second rotating shaft, and a lower swing seat arranged sequentially along the third direction. The upper swing seat is connected to the transition plate, and the upper swing seat and the lower swing seat are rotatably connected via the second rotating shaft, which is perpendicular to the first rotating shaft. A pair of adjustment posts are symmetrically arranged along the second rotating shaft on the side of the upper swing seat facing the lower swing seat, and the pair of adjustment posts are spaced apart from the lower swing seat by a preset distance.

[0013] In one embodiment, the first slide assembly includes a second positioning fixture, an optical axis, a slide box, and a cylinder arranged sequentially along the first direction. One end of the optical axis is connected to the second positioning fixture, and the other end is connected to the slide box. The cylinder is used to drive the slide box to move along the first direction. The second slide assembly has the same structure as the first slide assembly, and the slide boxes of the first slide assembly and the second slide assembly can move closer to or further away from each other along the first direction.

[0014] In one embodiment, the primary gear clearance and torque measuring device further includes a tray assembly for supporting the axle housing, the tray assembly being disposed between the first slide assembly and the second slide assembly, and the detection component being disposed on the side of the tray assembly. Attached Figure Description

[0015] Figure 1 A structural diagram of a primary gear clearance and torque measuring device provided in one embodiment of this application;

[0016] Figure 2 for Figure 1 A magnified view of the area within the dashed box;

[0017] Figure 3 A side view of a detection component provided for one embodiment of this application;

[0018] Figure 4 A structural diagram of the detection mechanism and angle adjustment structure provided in one embodiment of this application;

[0019] Figure 5 A schematic diagram of the structure of the first rotating shaft and the locating pin provided in one embodiment of this application;

[0020] Figure 6 A structural diagram of a first slide assembly provided for one embodiment of this application.

[0021] Figure label:

[0022] 100-Axle / Axle Housing; 101-Main Gear Input Shaft; A-First Direction; B-Second Direction; C-Third Direction; 1-First Slide Assembly; 2-Second Slide Assembly; 3-Detection Assembly; 31-Axle Housing Fixing Mechanism; 102-First Opening; 103-Second Opening; 104-Third Opening; 311-Positioning Plate; 312-First Positioning Fixture; 313-Index Pin; 3110-First Through Hole; 3131-Second Through Hole; 3132-Notch; C-First End; D-Second End; 3111-First Support Arm; 3112-Second Support Arm; 32-Shaft Fixing Mechanism; 33-Servo Motor; 34-Reducer; 321-Claw; 322-Pneumatic Chuck; 3221-Housing; 3222-Rotating Mechanism; 30-Coupling; 35-Torque Limiter; 36-Torque Sensor; 37-Housing; 38 - Fixed bracket; 323 - Third rotating shaft; 324 - First bearing; 325 - First bearing seat; 326 - Support plate; 39 - Horizontal adjustment assembly; 391 - First rotating shaft; 393 - Bearing seat; 394 - Positioning pin; 395 - L-shaped connector; 3911 - Fan-shaped notch; 39111 - First surface; 39112 - Second surface; 40 - Vertical adjustment assembly; 401 - Adapter plate; 402 - Upper swing seat; 403 - Second rotating shaft; 404 - Lower swing seat; 405 - Adjusting column; 301 - Telescopic arm; 302 - Locking cylinder; 303 - Sliding mechanism; 11 - Second positioning fixture; 12 - Optical axis; 13 - Slide box; 14 - Cylinder; 15 - Worktable; 16 - Slide rail; 17 - Cylinder support; 18 - Hydraulic buffer; 19 - Base; 20 - Adjusting block; 191 - Waist-shaped hole; 5 - Pallet assembly. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description of the application is provided in conjunction with the accompanying drawings and embodiments.

[0024] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more” unless the context clearly indicates otherwise.

[0025] References to “an embodiment” or “a specific embodiment” as used in this specification mean that one or more embodiments of this application include a particular feature, structure, or characteristic described in connection with that embodiment. The terms “comprising,” “including,” “having,” and variations thereof mean “including, but not limited to,” unless otherwise specifically emphasized.

[0026] First, let's introduce the application scenarios. Gear transmission, as a traditional transmission mechanism, is widely used in modern machinery. Gear transmission boasts a series of advantages, including constant instantaneous transmission ratio, good smoothness, precise motion transmission, a large adjustable range of power and speed, compact structure, ability to achieve large transmission ratios, high efficiency, and long service life. Therefore, it has become the preferred transmission mechanism in automobiles, ships, self-propelled artillery, aerospace, and many industrial machines. The gear meshing state (backlash, transmission error, etc.) is a crucial indicator for evaluating gear meshing quality, directly affecting the working accuracy, vibration noise, reliability, and service life of the gear transmission. Therefore, gear meshing clearance and torque measurement technology has a wide range of applications in many industries, especially in the automotive and tractor manufacturing sectors.

[0027] The main reducer is a crucial component of the axle transmission system. Installed within the axle housing, its primary function is to transmit power, reduce speed, and increase torque. The main reducer consists of a pair of driving and driven bevel gears. It achieves speed reduction by having the gear with fewer teeth drive the gear with more teeth; using bevel gear transmission can change the direction of torque rotation. The driving and driven bevel gears must have the correct relative position to ensure minimal impact noise and uniform tooth wear along their length during meshing, thus extending gear life. This requires careful assembly and adjustment of the driving and driven gears, primarily involving adjusting the meshing pattern and tooth backlash.

[0028] The axle housing is a crucial structure mounted on the axle of a vehicle, primarily used to support and protect key components such as the final drive, differential, and half-shafts. The axle housing is a rigid hollow beam connecting the left and right drive wheels, integrating the transmission components. Axle housings are mainly found in heavy commercial vehicles such as trucks, vans, and SUVs. Due to the complex structure and functional requirements of the axle housing, it is often designed as an irregularly shaped cross-section part to adapt to different operating environments and mechanical requirements. Therefore, when inspecting the final drive within the axle housing, it is not easy to fix and position the reducer. Manual fixation and measurement are required, leading to lower inspection accuracy and efficiency.

[0029] To address the aforementioned issues, this application provides a device for measuring the backlash and torque of the main and driven bevel gears. This device can automatically fix the axle housing and connect with the main gear input shaft of the main reducer inside the axle housing to measure its rotational torque. It can also automatically measure the backlash between the driving and driven (passive) bevel gears of the main reducer. This eliminates the inconvenience of manual inspection and improves inspection efficiency and measurement accuracy.

[0030] Figure 1 A schematic diagram of a device for measuring the backlash and torque of the primary gear teeth, provided for an embodiment of this application, is shown below. Figure 1 As shown, an embodiment of this application provides a primary gear backlash and torque measuring device, including a slide assembly and a detection assembly 3. The slide assembly includes a first slide assembly 1 and a second slide assembly 2 symmetrically arranged along a first direction A, which are used to fix the two ends of the axle 100, respectively. The detection assembly 3 is located between the first slide assembly 1 and the second slide assembly 2, and is used to connect to the main gear input shaft 101 of the main reducer within the axle 100 to measure the primary gear backlash and the transmission torque of the main gear input shaft 101. The detection assembly 3 includes an axle housing fixing mechanism 31, which is used to fix the middle region of the axle 100.

[0031] Figure 2 for Figure 1 A magnified view of the area within the dashed box. (See image below.) Figure 2 As shown, the axle 100 includes an axle housing, a main reducer, and a differential. The main reducer and the differential are drive-connected and both are located within the axle housing. The axle housing resembles a T-junction structure, including a first opening 102, a second opening 103, and a third opening 104. The first and second openings 102 and 103 are located on opposite sides of the axle housing, allowing the half-shafts of the axle 100 to pass through. These half-shafts are connected to the differential within the axle housing. The third opening 104 is located at a protruding point in the center of the axle housing, allowing the main gear input shaft 101 of the main reducer to pass through. It is worth noting that the axle 100 was not equipped with half-shafts during the inspection.

[0032] In the above embodiments, the main gear backlash and torque measuring device of this application can fix the axle housing of the axle 100 from three positions: both ends and the middle position of the axle 100. Specifically, the first slide assembly 1 and the second slide assembly 2 move closer to the axle housing and extend into the axle housing through the first opening 102 and the second opening 103, respectively, and mate with the spline holes at both ends of the differential inside the axle housing to achieve fixation of the axle 100 in the first direction A. The axle housing fixing mechanism 31 of the detection assembly fixes the third opening 104, and the detection assembly 3 mates with the main gear input shaft 101 to achieve fixation of the axle 100 in the second direction B. When the torque measurement begins, the first slide assembly 1 and the second slide assembly 2 move away from the axle housing, releasing the differential so that the main reducer can rotate. Then the detection assembly measures the main gear backlash and torque of the main reducer, avoiding the inconvenience of manual detection and the inaccuracy of measurement data.

[0033] Figure 3 A side view of a detection component provided in one embodiment of this application. Figure 4 This is a structural diagram of a detection mechanism and an angle adjustment structure provided in one embodiment of this application. (In conjunction with...) Figures 1-4 In one specific embodiment, the axle housing fixing mechanism 31 includes a positioning plate 311, a first positioning fixture 312, and an indexing pin 313. The positioning plate 311 is annular and has a first through hole 3110. The first positioning fixture 312 is installed on the inner wall of the first through hole 3110. The positioning plate 311 has a mounting hole that connects the inner and outer walls of the positioning plate 311. The indexing pin 313 is installed in the mounting hole and abuts against the first positioning fixture 312. The first positioning fixture 312 is also annular and has a second through hole 3131. The first positioning fixture 312 is clamped outside the third opening 104 to fix the axle housing and also allows the main gear input shaft 101 to pass through. The first positioning fixture 312 has a notch 3132, the position of which forms a first end C and a second end D, with a gap between the first end C and the second end D. When adjusting the indexing pin 313, it can press against the first positioning fixture 312 to adjust the distance between the first end C and the second end D, thereby adjusting the gap between the first end C and the second end D, and thus changing the diameter of the second through hole 3131. The axial direction of the first through hole 3110 and the second through hole 3131 is the second direction B, which is perpendicular to the first direction A. The diameter of the second through hole 3131 of this axle housing fixing mechanism 31 is adjustable, which can adapt to different models of axle housings and has a wide range of applications.

[0034] In a further embodiment, the positioning plate 311 includes a first arm 3111 and a second arm 3112, which together form a ring. One end of the first arm 3111 and the second arm 3112 are connected, and the other end has a slit. This slit facilitates the replacement of different models of the first positioning fixture 312 to accommodate different models of bridge housings.

[0035] In one embodiment, the detection component 3 further includes a shaft fixing mechanism 32 and a servo motor 33 arranged and connected along the second direction B. The shaft fixing mechanism 32 is used to connect to the end of the main gear input shaft 101, and the servo motor 33 is used to drive the shaft fixing mechanism 32 to rotate so as to drive the main gear input shaft 101 to rotate. The main gear input shaft 101 extends along the second direction B. A reducer 34 may also be installed at the output end of the servo motor 33.

[0036] In a further embodiment, the shaft fixing mechanism 32 includes a plurality of jaws 321 and a pneumatic chuck 322. The plurality of jaws 321 are mounted on the pneumatic chuck 322, and there are at least three jaws 321. A clamping space is formed between the plurality of jaws 321 for clamping the main gear input shaft 101. The pneumatic chuck 322 is used to drive the plurality of jaws 321 to retract to clamp the main gear input shaft 101; or the pneumatic chuck 322 is used to drive the jaws 321 to open to release the main gear input shaft 101.

[0037] In one embodiment, the detection component 3 further includes a coupling 30, a torque limiter 35, and a torque sensor 36 connected sequentially along the second direction B. The coupling 30, torque limiter 35, and torque sensor 36 are disposed between the servo motor 33 and the shaft fixing mechanism 32. The torque sensor 36 is used to detect the torque of the main gear input shaft 101, and the torque limiter 35 is used to protect the torque sensor 36.

[0038] The aforementioned shaft fixing mechanism 32, coupling 30, torque limiter 35, torque sensor 36, reducer 34 and servo motor 33 constitute a detection mechanism, which can measure the backlash and torque of the main reducer gear.

[0039] In one embodiment, the detection component 3 further includes a housing 37 and a fixed bracket 38. The coupling 30, torque limiter 35, and torque sensor 36 are all disposed inside the housing 37. The shaft fixing mechanism 32 and the servo motor 33 are respectively installed on both sides of the housing 37. Specifically, the shaft fixing mechanism 32 further includes a third rotating shaft 323, a first bearing 324, and a first bearing seat 325. The third rotating shaft 323 is connected to the first bearing 324, the first bearing 324 is installed on the first bearing seat 325, and the first bearing seat 325 is connected to the side wall of the housing 37. The pneumatic chuck 322 is connected to the side wall of the housing 37 through a support plate 326. One end of the fixed bracket 38 is connected to the housing 37, and the other end is connected to the axle housing fixing mechanism 31. The shaft fixing mechanism 32 is located between the axle housing fixing mechanism 31 and the housing 37, with a preset distance between the axle housing fixing mechanism 31 and the shaft fixing mechanism 32.

[0040] The pneumatic chuck 322 includes a housing 3221 and a rotating mechanism 3222. The rotating mechanism 3222 is disposed within the housing 3221 and is rotatable relative to the housing 3221. The jaws 321 are connected to the rotating mechanism 3222. The support plate 326 is specifically connected to the housing 3221 of the pneumatic chuck 322, thereby restricting the rotation of the housing 3221. A compressed air input pipe is connected to the housing 3221 to drive the jaws 321 to open or close. The jaws 321 are mounted on the rotating mechanism 3222. A third rotating shaft 323 is drively connected to the rotating mechanism 3222, and the third rotating shaft 323 drives the rotating mechanism 3222 to rotate, thereby driving the main gear input shaft 101 to rotate.

[0041] Figure 5 This is a schematic diagram of the structure of a first rotating shaft and a locating pin provided for one embodiment of this application. (In conjunction with...) Figures 3-5Because the angle of the detection component 3 may be incorrect when it mates with the third opening 104, in one embodiment, the detection component 3 further includes an angle adjustment mechanism to adjust the angle of the detection component 3. It is worth noting that the angle adjustment is a fine-tuning to overcome the angle error when the detection component 3 mates with the axle 100. The angle adjustment mechanism is fixedly installed on the top of the housing 37. The angle adjustment mechanism includes a horizontal adjustment component 39, which includes a first rotating shaft 391, a bearing, a bearing seat 393, and a positioning pin 394. The bearing is installed inside the bearing seat 393, and the positioning pin 394 is installed on the outer wall of the bearing seat 393 via an L-shaped connector 395. The positioning pin 394 is perpendicular to the third direction C. The first rotating shaft 391 is located at one end of the bearing seat 393 and connected to the bearing. The other end of the bearing seat 393 is fixedly connected to the housing 37. The bearing seat 393 and the first rotating shaft 391 are coaxially arranged, with their axial direction being the third direction C. This third direction C, the second direction B, and the first direction A are perpendicular to each other. The housing 37 is rotatable about a first pivot 391. The edge of the first pivot 391 has a fan-shaped notch 3911, into which one end of a locating pin 394 extends. The fan-shaped notch 3911 limits the range of movement of the locating pin 394. When the housing 37 is rotated horizontally, it causes the bearing seat 393 and the locating pin 394 to rotate together. When the rotation reaches a certain angle, the locating pin 394 abuts against the first surface 39111 or the second surface 39112 on both sides of the fan-shaped notch 3911, thus restricting its movement.

[0042] In one embodiment, the angle adjustment mechanism further includes a vertical adjustment component 40, which is arranged along a third direction C with the horizontal adjustment component 39. Specifically, the vertical adjustment component 40 can be installed above the horizontal adjustment component 39. The vertical adjustment component 40 includes a transition plate 401, an upper swing seat 402, a second rotating shaft 403, and a lower swing seat 404 arranged sequentially along a third direction C. The upper swing seat 402 is connected to the lower side of the transition plate 401. The upper swing seat 402 and the lower swing seat 404 are rotatably connected by the second rotating shaft 403, which is perpendicular to the first rotating shaft 391, i.e., the axial direction of the second rotating shaft 403 is the first direction A. A pair of adjustment posts 405 are provided on the side of the upper swing seat 402 facing the lower swing seat 404. The pair of adjustment posts are symmetrically arranged about the second rotating shaft 403 as the axis of symmetry, and the pair of adjustment posts are spaced apart from the lower swing seat 404 by a preset distance. The pair of adjustment posts are used to limit the rotation angle of the lower swing seat 404. Each adjusting post 405 includes a screw and a cover threadedly connected to the screw. Tightening the cover adjusts the relative position of the cover and the screw. One end of the screw is connected to the upper swing seat. When it is necessary to adjust the longitudinal angle of the detection component 3, the housing 37 rotates around the second pivot 403. When it rotates to the preset angle, the adjusting post is tightened so that it abuts against the upper surface of the lower swing seat 404, thereby locking the angle between the upper swing seat 402 and the lower swing seat 404.

[0043] In one embodiment, the detection component 3 further includes a height adjustment component, which includes a telescopic arm 301 and a locking cylinder 302. The telescopic arm 301 extends in a third direction C. The locking cylinder 302 drives the telescopic arm 301 to extend and lock, thereby adjusting the height position of the detection mechanism. One end of the telescopic arm 301 is connected to the adapter plate 401 of the vertical adjustment component 40, and the other end may be provided with a sliding mechanism 303, which can be installed on the roof of the factory or on a mounting frame inside the factory. The pulley mechanism allows the detection component 3 to move along a second direction B, closer to or further away from the axle 100.

[0044] Figure 6 A structural diagram of a first slide assembly provided in one embodiment of this application is shown below. Figure 6 As shown, in one embodiment, the first slide assembly 1 includes a second positioning fixture 11, an optical shaft 12, a slide box 13, and a cylinder 14 arranged sequentially along a first direction A. One end of the optical shaft 12 is connected to the second positioning fixture 11, and the other end is connected to the slide box 13. The cylinder 14 drives the slide box 13 to move along the first direction A, so that the second positioning fixture 11 is inserted into the first opening 102 or the second opening 103, and mates with the spline hole (not shown) of the differential. The second slide assembly 2 has the same structure as the first slide assembly 1, and the slide box 13 of the first slide assembly 1 and the slide box 13 of the second slide assembly 2 can move closer to or further away from each other along the first direction A.

[0045] In one embodiment, the first slide assembly 1 and the second slide assembly 2 are each provided with a worktable 15, which is provided with a slide rail 16, along which the slide box 13 slides. A cylinder support 17 is provided at one end of the worktable 15, and the cylinder 14 is mounted on the cylinder support 17. A hydraulic buffer 18 is provided at the other end of the worktable 15 to limit the movement of the slide.

[0046] In one embodiment, the bottom of the worktable 15 is further provided with a base 19, which has an adjusting block 20. The adjusting block 20 is used to adjust the position of the worktable 15 along the second direction B, so that the second positioning fixture 11 is coaxial with the differential, allowing it to engage with the spline of the differential. Furthermore, the adjusting block can also level the worktable 15. Specifically, the base 19 has an oblong hole 191 extending along the second direction B, and the worktable 15 is connected to the oblong hole 191 by screws. The adjusting block 20 includes a screw that extends along the second direction B and abuts against the bottom of the worktable 15. When the position of the worktable 15 needs to be adjusted, the screw can be turned, pressing the worktable 15 and causing it to move along the oblong hole 191.

[0047] like Figure 1As shown, in one embodiment, the gear backlash and torque measuring device further includes a tray assembly 5, which supports the axle 100. During testing, the tray assembly 5 is located between the first slide assembly 1 and the second slide assembly 2, and the testing component 3 is disposed on the side of the tray assembly 5. The tray assembly 5 can be connected to external production line equipment to move the axle 100 from the production line to a working position, which is between the first slide assembly 1 and the second slide assembly 2.

[0048] The gear backlash and torque measuring device also includes a communication module and a control module (not shown in the figure). The communication module is used to receive instructions from the external control system and send them to the control module. The detection component 3, the slide assembly and the tray assembly 5 are electrically connected to the control module. The control module is used to control the action of each component to complete the fixing and testing of the axle 100.

[0049] The working process and testing procedure of the main gear backlash and torque measuring device of this application are as follows: After the device is powered on and started, the external control system first determines whether each component is in its initial position. The pallet transports the axle 100 to the working position. The first slide assembly 1 and the second slide assembly 2 are driven by the cylinder 14 to bring the slide box 13 close to the axle 100, and the second positioning fixture 11 on the slide assembly aligns the spline holes at both ends of the differential in the axle housing, fixing the axle 100 in the first direction A. The testing component 3 moves to the axle 100, the first positioning fixture 312 engages with the third opening 104 of the axle housing, and the pneumatic chuck 322 drives the jaws 321 to grip the main gear input shaft 101, connecting the testing component 3 and the axle 100 into a whole.

[0050] Then, the first slide assembly 1 and the second slide assembly 2 move away from the bridge housing, and the servo motor 33 rotates continuously. After a period of break-in, the servo motor 33 rotates at a preset speed and time, and the detected rotational torque is recorded to measure the torque of the main gear input shaft 101.

[0051] When the second positioning fixture 11 of the first slide assembly 1 and the second slide assembly 2 is connected to the differential, the differential is fixed and its gears cannot rotate. Since the driven gear meshes with the differential, it is also fixed. Therefore, by rotating the driving gear in both directions by a small angle, it contacts the driven gear, allowing the gap between the driving and driven gears to be measured. When the second positioning fixture 11 is connected to the differential, the servo motor 33 cannot rotate continuously or complete a full revolution. During testing, the servo motor 33 rotates in both directions by a small angle, driving the main gear input shaft 101 to rotate. The rotation angle is recorded, thus measuring the gap between the driving and driven gears. To improve testing accuracy, the test can be repeated multiple times, for example, three times. During each test, the first slide assembly 1 and the second slide assembly 2 are moved away from the axle housing, and the second positioning fixture 11 releases the differential. After the servo motor 33 rotates continuously and is broken in for a period, the first slide assembly 1 and the second slide assembly 2 are brought closer to the axle housing. After the second positioning fixture 11 is connected to the differential, the servo motor 33 rotates by a small angle again for measurement. This process is repeated three times, with three checks performed. The control system calculates the average value of the three checks and uses this average value to determine the clearance between the master and slave teeth. After the servo motor 33 has been broken in, three points can be taken at 120° intervals in its rotation direction, and the position of each point can be checked once.

[0052] After the inspection is completed, the sliding component and the inspection component 3 are reset, the tray component 5 is released, and preparation is made for the next inspection.

[0053] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A device for measuring the clearance and torque of the primary gear teeth, characterized in that, Includes a slide assembly and a detection assembly, among which, The slide assembly includes a first slide assembly and a second slide assembly symmetrically arranged along a first direction, wherein the first slide assembly and the second slide assembly are respectively used to fix the two ends of the axle; The detection component is located between the first slide assembly and the second slide assembly. The detection component is used to connect with the main gear input shaft of the axle to measure the main gear clearance and the transmission torque of the main gear input shaft. The detection component includes an axle housing fixing mechanism for fixing the middle region of the axle.

2. The tooth clearance and torque measuring device according to claim 1, characterized in that, The bridge housing fixing mechanism includes a positioning plate, a first positioning fixture, and an indexing pin. The positioning plate has a first through hole, the first positioning fixture is installed on the inner wall of the first through hole, and the indexing pin is installed on the outer periphery of the positioning plate. The first positioning fixture has a second through hole, and the axial direction of the first through hole and the second through hole is a second direction, which is perpendicular to the first direction.

3. The tooth clearance and torque measuring device according to claim 2, characterized in that, The detection assembly further includes a shaft fixing mechanism and a servo motor arranged and connected in the second direction. The shaft fixing mechanism is used to connect the end of the main gear input shaft, and the servo motor is used to drive the shaft fixing mechanism to rotate so as to drive the main gear input shaft to rotate. The main gear input shaft extends in the second direction.

4. The device for measuring the clearance and torque of the primary gear according to claim 3, characterized in that, The shaft fixing mechanism includes multiple jaws and a pneumatic chuck. The multiple jaws are mounted on the pneumatic chuck, and a clamping space is formed between the multiple jaws for clamping the main gear input shaft. The pneumatic chuck is used to drive the multiple jaws to retract to clamp the main gear input shaft. Alternatively, the pneumatic chuck can be used to drive the jaws to open in order to release the main gear input shaft.

5. The device for measuring the clearance and torque of the primary gear according to claim 3, characterized in that, The detection assembly further includes a coupling, a torque limiter, and a torque sensor connected sequentially along the second direction, wherein the coupling, the torque limiter, and the torque sensor are disposed between the servo motor and the shaft fixing mechanism.

6. The device for measuring the clearance and torque of the primary gear according to claim 5, characterized in that, The detection assembly also includes a housing and a fixed bracket. The coupling, the torque limiter, and the torque sensor are disposed inside the housing. The shaft fixing mechanism and the servo motor are respectively installed on both sides of the housing. One end of the fixed bracket is connected to the housing, and the other end is connected to the axle housing fixing mechanism. The shaft fixing mechanism is located between the axle housing fixing mechanism and the housing.

7. The tooth clearance and torque measuring device according to claim 6, characterized in that, The detection component also includes an angle adjustment mechanism, which is fixedly installed on the top of the housing; The angle adjustment mechanism includes a horizontal adjustment component, which includes a first rotating shaft, a bearing, a bearing housing, and a positioning pin. The bearing is installed inside the bearing housing, and the positioning pin is installed on the outer wall of the bearing housing. The first rotating shaft is installed at one end of the bearing housing, and the other end of the bearing housing is fixedly connected to the housing. The bearing housing and the first rotating shaft are coaxially arranged with the axial direction of the third direction. The third direction, the second direction, and the first direction are perpendicular to each other. The housing can rotate around the first rotating shaft. The first rotating shaft has a fan-shaped notch on its edge, and the positioning pin extends into the notch. The fan-shaped notch is used to limit the range of movement of the positioning pin, and the positioning pin is perpendicular to the third direction.

8. The device for measuring the clearance and torque of the primary gear according to claim 7, characterized in that, The angle adjustment mechanism further includes a vertical adjustment component, which is arranged along the third direction with the horizontal adjustment component; The vertical adjustment assembly includes a transition plate, an upper swing seat, a second rotating shaft, and a lower swing seat arranged sequentially along the third direction. The upper swing seat is connected to the transition plate, and the upper swing seat and the lower swing seat are rotatably connected through the second rotating shaft. The second rotating shaft is perpendicular to the first rotating shaft. A pair of adjustment columns are symmetrically arranged along the second rotating shaft on the side of the upper swing seat facing the lower swing seat, and the pair of adjustment columns are spaced at a preset distance from the lower swing seat.

9. The device for measuring the clearance and torque of the primary gear and secondary gear according to claim 1, characterized in that, The first slide assembly includes a second positioning fixture, an optical axis, a slide box, and a cylinder arranged sequentially along the first direction. One end of the optical axis is connected to the second positioning fixture, and the other end is connected to the slide box. The cylinder is used to drive the slide box to move along the first direction. The second slide assembly has the same structure as the first slide assembly, and the slide box of the first slide assembly and the slide box of the second slide assembly can move closer or further apart from each other along the first direction.

10. The device for measuring the clearance and torque of the primary gear according to claim 1, characterized in that, It also includes a tray assembly for supporting the bridge housing, the tray assembly being disposed between the first slide assembly and the second slide assembly, and the detection assembly being disposed on the side of the tray assembly.

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