Automobile rear axle speed reducer gear meshing loading equipment

Abstract

The invention discloses gear meshing loading equipment for an automobile rear axle speed reducer. The gear meshing loading equipment comprises a fixed rack, an upper sliding table mechanism, a right feeding sliding table mechanism, a lower sliding table mechanism, a lower driving mechanism and a side face loading mechanism. In the working process, a workpiece is conveyed to a clamping station through the right feeding sliding table mechanism, the upper sliding table mechanism moves downwards, and the workpiece is positioned, clamped and lifted to be in a suspended state through the upper tool assembly. And then, the lower sliding table mechanism drives the lower driving mechanism to ascend so as to be in butt joint with the workpiece input flange and drive the workpiece input flange to rotate, meanwhile, a tensioning tool of the side face loading mechanism enters a workpiece differential mechanism hole under the action of a pushing air cylinder of the tensioning tool and is tensioned, and a servo motor of the tensioning tool outputs a reverse retarding torque according to a torque mode. According to the invention, the real load condition of the speed reducer after loading is simulated, so that a real contact mark is formed on a gear meshing surface. According to the invention, the problem of misjudgment of impressions caused by a traditional non-load detection method is solved, the accuracy of assembly quality judgment is effectively improved, and secondary rework is reduced.

Description

Technical Field

[0001] This invention relates to the display of gear contact marks after the assembly of a car rear axle reducer, specifically to a gear meshing loading device for a car rear axle reducer. Background Technology

[0002] During the assembly of the rear axle main reducer in automobiles, the gear contact marks are crucial to the overall vehicle's NVH (Noise, Vibration, and Harshness) test results. Traditional methods for creating these contact marks include: 1) applying red or yellow lead powder to the gear surface and then manually pushing the large ring gear back and forth; 2) applying red or yellow lead powder to the gear surface and then using a standard motor connected to the reducer flange to drive its rotation. Based on these two methods, after obtaining the gear contact marks, manual judgment is made based on the standards for these marks, and the direction of the contact marks after loading is predicted to comprehensively evaluate the reducer assembly's quality. However, since the gear contact marks obtained using these two methods are achieved under no-load conditions, after the reducer is installed in the rear axle and the vehicle assembly is completed, the gears bear a certain load, and the contact marks will change. This difference can lead to misjudgments of the gear contact marks obtained using the two traditional methods, ultimately resulting in the vehicle failing the NVH test. This invention addresses this technical problem by designing a device for loading the gears of the rear axle main reducer in automobiles. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a gear meshing loading device for a rear axle reducer of an automobile.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A gear meshing loading device for a rear axle reducer of an automobile, comprising: Fixed frame; The upper slide mechanism is vertically mounted on the fixed frame, and its bottom is equipped with an upper tooling assembly for moving, positioning and clamping the workpiece from above. The right feeding slide mechanism is horizontally installed on the fixed frame, and a lower tooling assembly is set on it to carry and transport the workpiece to the clamping station below the upper slide mechanism; The sliding table mechanism is vertically mounted on the fixed frame and located below the clamping station; The lower drive mechanism is mounted on the lower slide mechanism and is driven by the lower slide mechanism to rise to dock with and drive the input flange of the workpiece to rotate. The side loading mechanism is horizontally mounted on a fixed frame and located on the side of the clamping station. It includes a tensioning fixture that can be pushed and tensioned in the differential hole of the workpiece, and a servo drive assembly that drives the tensioning fixture to apply a resisting torque in the opposite direction of the gear drive. The upper sliding stage mechanism, the lower sliding stage mechanism, the lower drive mechanism, and the side loading mechanism work together to simulate the loading load of a vehicle by gear meshing when the workpiece is clamped and suspended in the air.

[0005] Furthermore, the upper slide mechanism includes a first servo motor, a first reducer, a coupling, a first ball screw, a first bearing housing, a second bearing housing, a screw nut bracket, a first guide rail, and an upper slide plate; The first servo motor is fixed by a motor fixing block, and its output shaft is connected to one end of the first ball screw through a coupling. The first ball screw is supported by a first bearing housing and a second bearing housing. The first bearing housing and the second bearing housing are respectively mounted on the fixed frame by a first bearing housing fixing block and a second bearing housing fixing block. The first ball screw has a screw nut bracket on its screw nut; The upper slide plate is fixedly connected to the lead screw nut bracket and is slidably mounted on the first guide rail; The first guide rail is fixedly installed on the fixed frame.

[0006] Furthermore, the lower slide mechanism includes a second servo motor, a second reducer, a synchronous belt and pulley, a second ball screw, a third bearing housing, a fourth bearing housing, a second guide rail, and a lower slide plate; The second servo motor is connected to the second reducer and is mounted together on the motor mounting plate; the motor mounting plate is mounted on the fixed frame via the motor adjustment plate; The output end of the second reducer is connected to one end of the second ball screw via a synchronous belt and pulley to transmit power; The second ball screw is supported by the third bearing housing and the fourth bearing housing, which are respectively mounted on the fixed frame by the third bearing housing fixing block and the fourth bearing housing fixing block. The lower slide plate is fixedly connected to the screw nut of the second ball screw and is slidably mounted on the second guide rail; The second guide rail is fixedly installed on the fixed frame.

[0007] Furthermore, the right feeding slide mechanism includes a rodless cylinder, a third guide rail, an intermediate bracket, and a middle slide plate; The middle slide plate is slidably mounted on the third guide rail; The slider of the rodless cylinder is fixedly connected to the middle slide plate to drive it to move horizontally along the third guide rail; The intermediate bracket is fixedly installed on the middle slide plate and is used to support the lower tooling assembly.

[0008] Furthermore, the side loading mechanism includes a third servo motor, a third reducer, a third synchronous belt and pulley, a tensioning fixture, a loading shaft, a tensioning cylinder, a loading spindle seat, a fourth guide rail, a floating slide rail, and a loading push cylinder; The third servo motor is connected to the third reducer and is mounted together on the third motor mounting plate, which is fixed by the motor adjustment plate; The output end of the third reducer is connected to one end of the loading shaft via a third synchronous belt and pulley to transmit torque; The loading shaft is supported by a loading spindle seat, and its other end is connected to the tensioning fixture; The tensioning cylinder is located inside the tensioning fixture and is used to drive the tensioning fixture to tighten or loosen. The loading spindle mount is installed on the loading spindle base; The loading shaft base is connected to the piston rod of the loading push cylinder and can slide along the fourth guide rail. The loading push cylinder drives the entire structure to move forward or backward, thereby allowing the tensioning fixture to enter or exit the workpiece differential hole. The loading shaft base is connected to the mounting base of the fourth guide rail via a floating slide rail to provide floating compensation.

[0009] Furthermore, the lower drive mechanism includes a fourth servo motor, a fourth reducer, a drive shaft assembly, and a motor mounting base; The fourth servo motor is connected to the input end of the fourth reducer and is mounted on the fourth motor mounting plate via a motor mounting bracket; The output end of the fourth reducer is connected to the drive shaft assembly via the fourth synchronous belt and pulley to drive its rotation; The drive shaft assembly and the fourth motor mounting plate are mounted together on a main shaft fixing plate; The main spindle fixing plate is fixedly installed on the main spindle sliding plate of the sliding table mechanism; The main shaft lower slide plate is connected to the lower support arm via the fifth guide rail and can slide along it; A fourth motor mounting adjustment plate is also provided between the fourth motor mounting plate and the main spindle fixing plate, which is used to adjust the mounting position of the fourth servo motor and the fourth reducer. A fourth floating slide rail is provided on the lower support arm to provide floating compensation.

[0010] Furthermore, the upper tooling assembly includes a tooling positioning plate, positioning pins, a gripper mechanism, and a gripper cylinder; The tooling positioning plate is fixedly installed on the upper slide plate; The positioning pin is fixedly installed on the tooling positioning plate and is used to cooperate with the workpiece positioning hole to achieve workpiece positioning. The gripper mechanism is mounted on the tooling positioning plate; The gripper cylinder is fixedly mounted on the tooling positioning plate, and its piston rod is connected to the gripper mechanism to drive the gripper mechanism to perform the action of clamping or releasing the workpiece.

[0011] Furthermore, the lower tooling assembly includes a carrier plate and positioning support columns for supporting and positioning the workpiece.

[0012] Furthermore, the third servo motor can output torque in torque mode, with a maximum output torque of 50 N·m.

[0013] The beneficial effects of this invention are as follows: When using this equipment, adjust the rear axle reducer assembly so that the large flange faces upward and the differential hole faces the side loading mechanism of the equipment. Then, use a lifting tool to hoist the reducer onto the lower tooling assembly on the right feeding slide mechanism of the equipment for positioning. Press the two-hand start button of the equipment, and the workpiece is automatically sent to the equipment clamping position. Then, the upper slide mechanism starts to move downward to the clamping position. Through the upper tooling assembly fixed on the upper bracket, the workpiece is positioned, clamped, and lifted to a certain height. The loading tensioning fixture is pushed into the differential hole of the workpiece by the loading push cylinder and tightens the differential hole under the action of the tensioning cylinder (see the structural diagram of the main reducer). The lower slide mechanism starts to drive the lower drive mechanism to rise. After successfully docking with the reducer flange (see the structural diagram of the main reducer), it starts to drive the flange to rotate. At the same time, the servo motor of the side loading mechanism outputs a certain torque in torque mode (which can be set as required, with a maximum setting of 50 N.m) to drive the loading shaft to make a resistive movement in the opposite direction of the gear drive, simulating the loading situation to load the reducer. The equipment is used to load the gear contact imprints, and then the gear contact imprints are judged manually. Since the loading is the same as the actual loading situation, the resulting gear contact imprints will not cause misjudgment, reducing secondary rework, saving time and effort, and preventing damage to the reducer housing and gears. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 This is a structural schematic diagram of the present invention from another angle.

[0016] Figure 3 This is a schematic diagram of the side loading mechanism of the present invention.

[0017] Figure 4 This is a schematic diagram of the drive mechanism of the present invention.

[0018] Figure 5 This is a schematic diagram of the tooling assembly of the present invention.

[0019] Figure 6 This is a schematic diagram of the tooling assembly of the present invention.

[0020] Figure 7 This is a diagram illustrating the effect of using the present invention; Figure 8 This is a structural schematic diagram of the main reducer that needs to show the gear contact imprint after loading, as per the present invention. Detailed Implementation

[0021] like Figures 1 to 8 As shown, a gear meshing loading device for a car rear axle reducer includes: Fixed frame 1; The upper slide mechanism is vertically mounted on the fixed frame 1, and its bottom is provided with an upper tooling assembly 60 for moving, positioning and clamping the workpiece from above. The right feeding slide mechanism is horizontally installed on the fixed frame 1, and a lower tooling assembly 65 is provided on it to carry and transport the workpiece to the clamping station below the upper slide mechanism. The sliding table mechanism is vertically mounted on the fixed frame 1 and located below the clamping station; The lower drive mechanism 47 is mounted on the lower slide mechanism and is driven by the lower slide mechanism to rise to dock with and drive the input flange of the workpiece to rotate. The side loading mechanism 30 is horizontally mounted on the fixed frame 1 and located on the side of the clamping station. It includes a tensioning fixture 36 that can be pushed and tensioned in the differential hole of the workpiece, and a servo drive assembly that drives the tensioning fixture 36 to apply a resisting torque in the opposite direction of the gear drive. The upper sliding stage mechanism, the lower sliding stage mechanism, the lower drive mechanism 47, and the side loading mechanism 30 work together to simulate the loading load of a vehicle by gear meshing when the workpiece is clamped and suspended.

[0022] The upper slide mechanism includes a first servo motor 2, a first reducer 3, a coupling 5, a first ball screw 6, a first bearing housing 7, a second bearing housing 8, a screw nut bracket 11, a first guide rail 12, and an upper slide plate 13; The first servo motor 2 is fixed by the motor fixing block 4, and its output shaft is connected to one end of the first ball screw 6 through the coupling 5. The first ball screw 6 is supported by the first bearing seat 7 and the second bearing seat 8. The first bearing seat 7 and the second bearing seat 8 are respectively mounted on the fixed frame 1 by the first bearing seat fixing block 9 and the second bearing seat fixing block 10. A screw nut bracket 11 is provided on the screw nut of the first ball screw 6; The upper slide plate 13 is fixedly connected to the lead screw nut bracket 11 and is slidably mounted on the first guide rail 12; The first guide rail 12 is fixedly installed on the fixed frame 1.

[0023] The sliding table mechanism includes a second servo motor 14, a second reducer 15, a synchronous belt and pulley 18, a second ball screw 19, a third bearing housing 20, a fourth bearing housing 21, a second guide rail 24, and a lower slide plate 25. The second servo motor 14 is connected to the second reducer 15 and is mounted together on the motor mounting plate 16; the motor mounting plate 16 is mounted on the fixed frame 1 through the motor adjustment plate 17. The output end of the second reducer 15 is connected to one end of the second ball screw 19 via a synchronous belt and pulley 18 to transmit power; The second ball screw 19 is supported by the third bearing seat 20 and the fourth bearing seat 21. The third bearing seat 20 and the fourth bearing seat 21 are respectively mounted on the fixed frame 1 by the third bearing seat fixing block 22 and the fourth bearing seat fixing block 23. The lower slide plate 25 is fixedly connected to the screw nut of the second ball screw 19 and is slidably mounted on the second guide rail 24; The second guide rail 24 is fixedly installed on the fixed frame 1.

[0024] The right feeding slide mechanism includes a rodless cylinder 26, a third guide rail 27, an intermediate bracket 28, and a middle slide plate 29; The middle slide plate 29 is slidably mounted on the third guide rail 27; The slider of the rodless cylinder 26 is fixedly connected to the middle slide plate 29 to drive it to move horizontally along the third guide rail 27; The intermediate bracket 28 is fixedly installed on the intermediate slide plate 29 to support the lower tooling assembly 65.

[0025] The side loading mechanism 30 includes a third servo motor 31, a third reducer 32, a third synchronous belt and pulley 35, a tensioning fixture 36, a loading shaft 37, a tensioning cylinder 41, a loading spindle seat 42, a fourth guide rail 43, a floating slide rail 44, and a loading push cylinder 45. The third servo motor 31 is connected to the third reducer 32 and is mounted together on the third motor mounting plate 33. The third motor mounting plate 33 is fixed by the motor adjustment plate 34. The output end of the third reducer 32 is connected to one end of the loading shaft 37 via the third synchronous belt and pulley 35 to transmit torque; The loading shaft 37 is supported by the loading spindle seat 42, and its other end is connected to the tensioning fixture 36. The tensioning cylinder 41 is located inside the tensioning fixture 36 and is used to drive the tensioning fixture 36 to tension or loosen. The loading spindle seat 42 is mounted on the loading shaft base 46; The loading shaft base 46 is connected to the piston rod of the loading push cylinder 45 and can slide along the fourth guide rail 43. The loading push cylinder 45 drives the entire structure to move forward or backward, thereby causing the tensioning fixture 36 to enter or exit the workpiece differential hole. The loading shaft base 46 is connected to the mounting base of the fourth guide rail 43 via a floating slide rail 44 to provide floating compensation.

[0026] The lower drive mechanism 47 includes a fourth servo motor 48, a fourth reducer 49, a drive shaft assembly 54, and a motor mounting base 50; The fourth servo motor 48 is connected to the input end of the fourth reducer 49 and is mounted on the fourth motor mounting plate 51 via the motor mounting bracket 50; The output end of the fourth reducer 49 is connected to the drive shaft assembly 54 via the fourth synchronous belt and pulley 53 to drive its rotation; The drive shaft assembly 54 and the fourth motor mounting plate 51 are mounted together on a main shaft fixing plate 55; The main shaft fixing plate 55 is fixedly installed on the main shaft lower slide plate 56 of the lower slide mechanism; The main shaft lower slide plate 56 is connected to the lower support arm 59 via the fifth guide rail 57 and can slide along it; A fourth motor mounting adjustment plate 52 is also provided between the fourth motor mounting plate 51 and the main shaft fixing plate 55, which is used to adjust the mounting position of the fourth servo motor 48 and the fourth reducer 49. A fourth floating slide rail 58 is provided on the lower support arm 59 to provide floating compensation.

[0027] The upper tooling assembly 60 includes a tooling positioning plate 61, a positioning post 62, a gripper mechanism 63, and a gripper cylinder 64; Tooling positioning plate 61 is fixedly installed on upper slide plate 13; The positioning pin 62 is fixedly installed on the tooling positioning plate 61 and is used to cooperate with the workpiece positioning hole to achieve workpiece positioning. The gripper mechanism 63 is mounted on the tooling positioning plate 61; The gripper cylinder 64 is fixedly mounted on the tooling positioning plate 61, and its piston rod is connected to the gripper mechanism 63 to drive the gripper mechanism 63 to perform the action of clamping or releasing the workpiece.

[0028] The lower tooling assembly 65 includes a carrier plate 66 and a positioning support column 67 for supporting and positioning the workpiece.

[0029] The third servo motor 31 can output torque in torque mode, with a maximum output torque of 50 N·m.

[0030] The complete operation procedure of the equipment is as follows: First, adjust the rear axle reducer assembly so that the large flange faces upward and the differential hole faces the loading mechanism 30 on the side of the equipment. Use a lifting tool to hoist the reducer onto the lower tooling assembly 65 of the right feeding slide mechanism, and perform initial positioning and support through the positioning support column 67. The operator presses the two-hand start button of the equipment (in accordance with safety regulations, both buttons must be pressed simultaneously to prevent accidental operation). The rodless cylinder 26 of the right feeding slide mechanism is activated, driving the middle slide plate 29 to move horizontally along the third guide rail 27, automatically and smoothly conveying the workpiece to the equipment clamping position, that is, directly below the upper slide mechanism. Subsequently, the first servo motor 2 of the upper slide mechanism starts, driving the first ball screw 6 to rotate through the first reducer 3 and the coupling 5. The screw nut drives the screw nut bracket 11 to move downward, thereby driving the upper slide plate 13 to descend along the first guide rail 12. When the positioning pin 62 of the upper tooling assembly 60 is inserted into the workpiece positioning hole, the workpiece is precisely positioned. The gripper cylinder 64 then actuates, driving the gripper mechanism 63 to firmly clamp the workpiece. The upper slide mechanism then rises, lifting the workpiece to a certain height, completely detaching it from the lower tooling assembly 65, leaving it suspended in the air, thus providing space for subsequent operations.

[0031] Next, the side loading mechanism 30 begins to operate: the loading push cylinder 45 drives the loading shaft base 46 forward along the fourth guide rail 43, allowing the tensioning fixture 36 to smoothly enter the differential hole of the workpiece. The tensioning cylinder 41 actuates, driving the tensioning block inside the tensioning fixture 36 to expand radially and firmly fix it inside the differential hole. Simultaneously, the second servo motor 14 of the sliding table mechanism starts, driving the second ball screw 19 to rotate through the second reducer 15 and the synchronous belt and pulley 18. The screw nut drives the lower slide plate 25 to rise along the second guide rail 24, thereby pushing the lower drive mechanism 47 to rise as a whole. After the drive shaft assembly 54 of the lower drive mechanism 47 successfully aligns with the input flange of the workpiece (the alignment signal is detected by a sensor), the fourth servo motor 48 starts, driving the drive shaft assembly 54 to rotate through the fourth reducer 49 and the fourth synchronous belt and pulley 53, causing the workpiece input flange to rotate at the set speed. Almost simultaneously, the third servo motor 31 of the side loading mechanism 30 outputs torque according to a preset torque mode (which can be set according to process requirements, with a maximum of 50 N·m). This torque drives the loading shaft 37 to rotate via the third reducer 32, the third synchronous belt, and the pulley 35, but the direction of rotation is opposite to the gear drive direction. This applies a resisting torque to the differential gear, simulating the real load conditions during vehicle operation. During this process, the gear meshing surface produces contact marks under load, and these marks are highly consistent with the actual marks after installation.

[0032] After the loading process continues for a set time, the equipment automatically enters the unloading sequence: the third servo motor 31 stops outputting torque, the tensioning cylinder 41 releases the tensioning fixture 36, and the loading push cylinder 45 drives the loading shaft base 46 to retract, causing the tensioning fixture 36 to exit the differential hole. The lower slide mechanism drives the lower drive mechanism 47 to descend, disengaging it from the workpiece input flange. The upper slide mechanism descends, repositioning the workpiece onto the lower fixture assembly 65, and the gripper cylinder 64 releases the workpiece. The right feeding slide mechanism activates, removing the workpiece from the clamping position. The operator can then use a lifting device to remove the workpiece and visually inspect or measure the gear contact marks, judging the assembly quality according to enterprise standards or industry specifications. Because the loading conditions closely match the actual vehicle load, the accuracy of mark judgment is greatly improved, effectively avoiding misjudgments and rework caused by traditional no-load testing, while also reducing the risk of workpiece collisions during handling and testing.

[0033] This invention achieves automated and precise loading of gear meshing in automotive rear axle reducers by integrating multi-axis servo control, precision mechanical transmission, and a pneumatic clamping system. The equipment boasts the following significant advantages: First, the loading torque can be precisely set and adjusted, with a maximum torque of 50 N·m, covering the testing needs of various vehicle models; second, it employs a floating compensation mechanism, adapting to workpiece assembly tolerances and improving equipment lifespan and reliability; third, the entire operation process is highly automated, reducing manual intervention and improving testing efficiency and consistency; fourth, the simulated conditions are realistic and reliable, effectively avoiding misjudgment problems in traditional processes, reducing quality risks and rework costs. Furthermore, the equipment has a compact structure, is easy to maintain, and is suitable for online testing on production lines or offline testing in laboratories, possessing broad application value.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A gear meshing loading device for a rear axle reducer of an automobile, characterized in that, include: Fixed frame (1); The upper slide mechanism is vertically installed on the fixed frame (1), and its bottom is provided with an upper tooling assembly (60) for moving, positioning and clamping the workpiece from above; The right feeding slide mechanism is horizontally installed on the fixed frame (1), and a lower tooling assembly (65) is provided on it for carrying and conveying the workpiece to the clamping station below the upper slide mechanism; The sliding table mechanism is vertically installed on the fixed frame (1) and located below the clamping station; The lower drive mechanism (47) is mounted on the lower slide mechanism and is driven by the lower slide mechanism to rise to dock with and drive the input flange of the workpiece to rotate. The side loading mechanism (30) is horizontally mounted on the fixed frame (1) and located on the side of the clamping station. It includes a tensioning fixture (36) that can be pushed and tensioned in the differential hole of the workpiece, and a servo drive assembly that drives the tensioning fixture (36) to apply a resisting torque in the opposite direction of the gear drive. The upper sliding stage mechanism, the lower sliding stage mechanism, the lower drive mechanism (47) and the side loading mechanism (30) work together to simulate the loading load of the vehicle and perform gear meshing loading when the workpiece is clamped and suspended.

2. The automotive rear axle reducer gear meshing loading device according to claim 1, characterized in that, The upper slide mechanism includes a first servo motor (2), a first reducer (3), a coupling (5), a first ball screw (6), a first bearing seat (7), a second bearing seat (8), a screw nut bracket (11), a first guide rail (12), and an upper slide plate (13). The first servo motor (2) is fixed by a motor fixing block (4), and its output shaft is connected to one end of the first ball screw (6) through the coupling (5); The first ball screw (6) is supported by the first bearing seat (7) and the second bearing seat (8), and the first bearing seat (7) and the second bearing seat (8) are respectively mounted on the fixed frame (1) by the first bearing seat fixing block (9) and the second bearing seat fixing block (10). The first ball screw (6) is provided with a screw nut bracket (11) on the screw nut. The upper slide plate (13) is fixedly connected to the lead screw nut bracket (11) and is slidably mounted on the first guide rail (12); The first guide rail (12) is fixedly installed on the fixed frame (1).

3. The automotive rear axle reducer gear meshing loading device according to claim 1, characterized in that, The lower slide mechanism includes a second servo motor (14), a second reducer (15), a synchronous belt and pulley (18), a second ball screw (19), a third bearing seat (20), a fourth bearing seat (21), a second guide rail (24), and a lower slide plate (25). The second servo motor (14) is connected to the second reducer (15) and is mounted together on the motor mounting plate (16); the motor mounting plate (16) is mounted on the fixed frame (1) through the motor adjustment plate (17); The output end of the second reducer (15) is connected to one end of the second ball screw (19) through the synchronous belt and pulley (18) to transmit power; The second ball screw (19) is supported by the third bearing seat (20) and the fourth bearing seat (21), and the third bearing seat (20) and the fourth bearing seat (21) are respectively mounted on the fixed frame (1) by the third bearing seat fixing block (22) and the fourth bearing seat fixing block (23); The lower slide plate (25) is fixedly connected to the screw nut of the second ball screw (19) and is slidably mounted on the second guide rail (24); The second guide rail (24) is fixedly installed on the fixed frame (1).

4. The automotive rear axle reducer gear meshing loading device according to claim 1, characterized in that, The right feeding slide mechanism includes a rodless cylinder (26), a third guide rail (27), an intermediate bracket (28), and a middle slide plate (29). The middle slide plate (29) is slidably mounted on the third guide rail (27); The slider of the rodless cylinder (26) is fixedly connected to the middle slide plate (29) to drive it to move horizontally along the third guide rail (27); The intermediate bracket (28) is fixedly installed on the intermediate slide plate (29) and is used to support the lower tooling assembly (65).

5. The automotive rear axle reducer gear meshing loading device according to claim 1, characterized in that, The side loading mechanism (30) includes a third servo motor (31), a third reducer (32), a third synchronous belt and pulley (35), a tensioning fixture (36), a loading shaft (37), a tensioning cylinder (41), a loading spindle seat (42), a fourth guide rail (43), a floating slide rail (44), and a loading push cylinder (45). The third servo motor (31) is connected to the third reducer (32) and is mounted together on the third motor mounting plate (33), which is fixed by the motor adjustment plate (34); The output end of the third reducer (32) is connected to one end of the loading shaft (37) through the third synchronous belt and pulley (35) to transmit torque; The loading shaft (37) is supported by the loading spindle seat (42), and its other end is connected to the tensioning fixture (36); The tensioning cylinder (41) is disposed inside the tensioning fixture (36) and is used to drive the tensioning fixture (36) to tension or loosen. The loading spindle seat (42) is mounted on the loading shaft base (46); The loading shaft base (46) is connected to the piston rod of the loading push cylinder (45) and can slide along the fourth guide rail (43). The loading push cylinder (45) drives the entire structure to move forward or backward, thereby causing the tensioning fixture (36) to enter or exit the workpiece differential hole. The loading shaft base (46) is connected to the mounting base of the fourth guide rail (43) via the floating slide rail (44) to provide floating compensation.

6. The automotive rear axle reducer gear meshing loading device according to claim 3, characterized in that, The lower drive mechanism (47) includes a fourth servo motor (48), a fourth reducer (49), a drive shaft assembly (54), and a motor mounting base (50). The fourth servo motor (48) is connected to the input end of the fourth reducer (49) and is mounted on the fourth motor mounting plate (51) through the motor mounting bracket (50); The output end of the fourth reducer (49) is connected to the drive shaft assembly (54) via a fourth synchronous belt and pulley (53) to drive it to rotate; The drive shaft assembly (54) and the fourth motor mounting plate (51) are mounted together on a main shaft fixing plate (55); The main shaft fixing plate (55) is fixedly installed on the main shaft lower slide plate (56) of the lower slide mechanism; The main shaft lower slide plate (56) is connected to the lower support arm (59) via the fifth guide rail (57) and can slide along it; A fourth motor mounting adjustment plate (52) is also provided between the fourth motor mounting plate (51) and the main shaft fixing plate (55) for adjusting the mounting positions of the fourth servo motor (48) and the fourth reducer (49); The lower support arm (59) is provided with a fourth floating slide rail (58) for providing floating compensation.

7. The automotive rear axle reducer gear meshing loading device according to claim 2, characterized in that, The upper tooling assembly (60) includes a tooling positioning plate (61), a positioning post (62), a gripper mechanism (63), and a gripper cylinder (64). The tooling positioning plate (61) is fixedly installed on the upper slide plate (13); The positioning pin (62) is fixedly installed on the tooling positioning plate (61) and is used to cooperate with the workpiece positioning hole to achieve workpiece positioning; The gripper mechanism (63) is mounted on the tooling positioning plate (61); The gripper cylinder (64) is fixedly mounted on the tooling positioning plate (61), and its piston rod is connected to the gripper mechanism (63) to drive the gripper mechanism (63) to perform the action of clamping or releasing the workpiece.

8. The automotive rear axle reducer gear meshing loading device according to claim 1, characterized in that, The lower tooling assembly (65) includes a carrier plate (66) and a positioning support column (67) for supporting and positioning the workpiece.

9. The automotive rear axle reducer gear meshing loading device according to claim 5, characterized in that, The third servo motor (31) is capable of outputting torque in torque mode, with a maximum output torque of 50 N·m.

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