A press-fitting device for a rear axle assembly

Abstract

The present invention relates to a press-fitting device for a rear axle assembly, which comprises a frame, a press-fitting area arranged on the frame, two groups of presses and two groups of press head assemblies. The press-fitting area is located between the two groups of press head assemblies, and the press head assemblies are used for press-fitting oil seals. The press-fitting area comprises a positioning mechanism and two supporting parts respectively located on both sides of the positioning mechanism. The positioning mechanism is used for positioning the main reduction assembly. The positioning mechanism comprises a first positioning structure, and the main reduction assembly comprises a second positioning structure adapted to the first positioning structure. The supporting parts and the press head assemblies can respectively support the half shaft assembly from both ends. After the first positioning structure and the second positioning structure are matched, the press can act on the press head assembly to press-fit the oil seal onto the half shaft assembly and push the half shaft assembly to press-fit it onto the main reduction assembly. It can improve the press-fitting efficiency of the rear axle assembly and ensure the production rhythm to meet the requirements of large-scale and high-volume production.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive component assembly equipment, and particularly to a press-fitting device for a rear axle assembly. Background Art

[0002] The rear axle assembly refers to the component of the vehicle's power transmission rear drive shaft, which specifically includes a main reduction assembly and two half-axle assemblies disposed on both sides of the main reduction assembly, and can perform differential motion. Specifically during press-fitting, one end of each of the two half-axle assemblies needs to be press-fitted to the main reduction assembly respectively, and a oil seal also needs to be press-fitted to the end of the half-axle assembly far from the main reduction assembly. And how to ensure the effective press-fitting of the rear axle assembly not only determines the quality of the rear axle assembly, but also is related to the safety of vehicle driving, which has become a key point for ensuring the assembly quality of the rear axle assembly.

[0003] In the prior art, for the press-fitting of the automotive rear axle assembly, the half-axle assembly and the main reduction assembly are first press-fitted, and then moved to the next station for oil seal press-fitting. In this way, it is time-consuming and laborious and has low efficiency. When large-scale and mass production is required, the equipment process may not be able to meet the production requirements.

[0004] Therefore, how to improve the press-fitting efficiency of the rear axle assembly and ensure the production rhythm to meet the large-scale and mass production requirements is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a press-fitting device for a rear axle assembly, which can improve the press-fitting efficiency of the rear axle assembly and ensure the production rhythm to meet the large-scale and mass production requirements.

[0006] To achieve the above object, the present invention provides a press-fitting device for a rear axle assembly, which includes a frame and a press-fitting area, two groups of presses and two groups of press head assemblies disposed on the frame. The press-fitting area is located between the two groups of press head assemblies, and the press head assemblies are used for press-fitting oil seals; the press-fitting area includes a positioning mechanism and two support parts respectively located on both sides of the positioning mechanism. The positioning mechanism is used for positioning the main reduction assembly. The positioning mechanism includes a first positioning structure, and the main reduction assembly includes a second positioning structure adapted to the first positioning structure. The support parts and the press head assemblies can support the half-axle assemblies from both ends respectively; when the first positioning structure and the second positioning structure cooperate, the press can act on the press head assemblies to press the oil seal onto the half-axle assembly and push the half-axle assembly to press it onto the main reduction assembly.

[0007] When the first positioning structure and the second positioning structure cooperate, and both ends of the half shaft assembly are respectively supported by the supporting part and the pressing head assembly, the pressing conditions are met between the half shaft assembly and the main reduction assembly, and the pressing conditions are also met between the oil seal and the half shaft assembly. The press can act on the pressing head assembly to press the oil seal onto the half shaft assembly, and after the oil seal pressing is completed, the press can push the half shaft assembly through the pressing head assembly to press it onto the main reduction assembly, so as to realize the pressing of the oil seal and the half shaft assembly simultaneously during a one-time pressing operation.

[0008] That is to say, in the pressing equipment of the rear axle assembly, two presses act simultaneously, and press the oil seals of the two half shaft assemblies from both sides through two pressing head assemblies at the same time. After the oil seal pressing is completed, the two presses continue to act, and push the two half shaft assemblies from both sides through the two pressing head assemblies to move towards the main reduction assembly until the pressing is completed. It can simplify the overall structure of the equipment, simplify the pressing process, and effectively improve the pressing efficiency of the rear axle assembly, ensuring the production rhythm to meet the large-scale and high-volume production requirements.

[0009] Optionally, the press is a servo press.

[0010] Optionally, the positioning mechanism includes a floating seat, a base, and a lifting driving member provided on the base. The first positioning structure is provided on the upper end surface of the base. The positioning mechanism further includes a lifting driving member and a floating seat. The floating seat can support the main reduction assembly from the bottom, and the lifting driving member can drive the floating seat to lift.

[0011] Optionally, the positioning mechanism further includes at least two groups of support blocks. After the lifting driving member drives the floating seat to lift to a preset position, the support blocks can support the floating seat.

[0012] Optionally, the positioning mechanism further includes a pushing member and a sliding member. Each of the support blocks is fixed to the sliding member, and the pushing member can push the sliding member to slide and drive the support blocks to move.

[0013] Optionally, the positioning mechanism further includes a guiding member. The guiding member includes a guide shaft and a positioning sleeve fixed to the base. The axis of the positioning sleeve is arranged in the vertical direction and sleeved outside the guide shaft. The guide shaft is arranged between the lifting driving member and the floating seat, and a flat key arranged along the axial direction is further provided between the guide shaft and the positioning sleeve.

[0014] Optionally, the supporting part is a V-shaped support block detachably connected to the base.

[0015] Optionally, the indenter assembly includes a centering shaft, a pushing block, and a positioning shaft. The pushing block is sleeved outside the centering shaft and can move axially along the centering shaft. The pushing block is provided with a supporting structure for supporting the end flange hole of the half shaft assembly. The positioning shaft is fixed to the end of the centering shaft and is adapted to the oil seal. The centering shaft is provided with an abutting member. After the press can push the centering shaft to move until the oil seal and the half shaft assembly are press-fitted, the abutting member abuts against the pushing block and pushes the pushing block to press-fit the half shaft assembly and the main reduction assembly.

[0016] Optionally, the abutting member is provided with a guiding channel arranged axially along the centering shaft, and the pushing block is further provided with a guiding block that can slide along the guiding channel.

[0017] Optionally, the indenter assembly further includes a spring, and the spring is clamped between the centering shaft and the pushing block.

[0018] Optionally, it further includes an angle adjusting device. The angle adjusting device includes a measuring part, a calculating part, and an adjusting part. The half shaft assembly is further provided with a spring plate mounting seat. The measuring part includes a driving member and two displacement sensors arranged at intervals in the vertical direction. The driving member can simultaneously drive the two displacement sensors to move towards the spring plate mounting seat until they abut against the spring plate mounting seat. The calculating part can calculate the inclination angle of the spring plate mounting seat according to the distance between the measuring heads of the two displacement sensors and the moving distance. The adjusting part can drive the half shaft assembly to rotate through the indenter assembly until the inclination angle is within a preset angle range.

[0019] Optionally, the adjusting part includes a motor and a gear assembly. The motor can drive the centering shaft to rotate through the gear assembly, and a rotation-limiting positioning pin is arranged between the end face of the pushing block and the end face of the flange hole of the half shaft assembly.

[0020] Optionally, it further includes a feeding device. The feeding device includes a storage part, a feeding channel, a blocking cylinder, and a moving part. The storage part is used for storing the oil seal. The feeding channel is arranged vertically. The oil seal in the storage part can fall into the moving part along the feeding channel under the action of gravity. The moving part can move the oil seal to cooperate with the indenter assembly. A blocking member, a releasing member, and a blanking photoelectric switch are further arranged between the storage part and the feeding channel.

[0021] Optionally, the feeding device is further provided with a wrong installation prevention photoelectric induction switch. Description of the Drawings

[0022] Figures 1 - 2 is a schematic structural diagram of the press-fitting device for the rear axle assembly provided by the embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of the structure of the press-fitting area;

[0024] Figure 4 is Figure 3 a side view of;

[0025] Figure 5 is Figure 4 a sectional view taken along A-A of;

[0026] Figure 6 is a schematic diagram of the structure of the press head assembly and the angle adjustment assembly;

[0027] Figure 7 is Figure 6 a schematic diagram of the structure of B-B in;

[0028] Figure 8 is Figure 6 a schematic diagram of the structure of C-C in;

[0029] Figure 9 is a schematic diagram of the structure of the press head assembly;

[0030] Figure 10 is Figure 9 a sectional view of;

[0031] Figure 11 is a schematic diagram of the principle of the measuring part.

[0032] Appendix Figures 1 - 11 In, the reference numerals are explained as follows:

[0033] 1 - Frame;

[0034] 2 - Press-fitting area, 21 - Positioning mechanism, 211 - Base, 212 - Lifting driving part, 213 - Floating seat, 214 - Support block, 215 - Pushing part, 216 - Sliding part, 217 - Guide shaft, 218 - Positioning sleeve, 219 - T-shaped connector, 22 - Support part, 23 - First positioning structure, 24 - Pressing part, 25 - Anti-misalignment switch;

[0035] 3 - Press;

[0036] 4 - Press head assembly, 41 - Centering shaft, 411 - Contact part, 412 - Guide channel, 42 - Pushing block, 421 - Support structure, 422 - Guide block, 43 - Positioning shaft, 44 - Spring, 45 - Limited rotation positioning pin;

[0037] 51 - Measuring part, 52 - Adjusting part, 521 - Motor, 522 - Gear assembly;

[0038] 6 - Feeding device;

[0039] 7 - Electrical cabinet;

[0040] 8 - Protective net;

[0041] 9 - Operating platform;

[0042] 10 - Main reduction assembly;

[0043] 20 - Half - shaft assembly, 201 - Spring plate mounting seat. Specific embodiments

[0044] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] Reference Figures 1 - 11 , Figures 1 - 2 is a schematic structural diagram of the press - fitting device for the rear axle assembly provided by the embodiment of the present invention; Figure 3 is a schematic structural diagram of the press - fitting area; Figure 4 is Figure 3 side view of; Figure 5 is Figure 4 A - A cross - sectional view of; Figure 6 is a schematic structural diagram of the press head assembly and the angle adjustment assembly; Figure 7 is Figure 6 structural diagram of B - B in; Figure 8 is Figure 6 structural diagram of C - C in; Figure 9 is a schematic structural diagram of the press head assembly; Figure 10 is Figure 9 cross - sectional view of; Figure 11 is a schematic diagram of the principle of the measuring part.

[0046] The embodiment of the present invention provides a press - fitting device for a rear axle assembly. As shown in Figure 1 and Figure 2 , the press - fitting device for the rear axle assembly includes a frame 1 and a press - fitting area 2 provided on the frame 1, two groups of presses 3, and two groups of press head assemblies 4 for press - fitting oil seals. Among them, the press - fitting area 2 is located between the two groups of press head assemblies 4. As shown in Figure 3 , the press - fitting area 2 includes a positioning mechanism 21 and two support parts 22 respectively located on both sides of the positioning mechanism 21. The positioning mechanism 21 is used to position the main reduction assembly 10. The positioning mechanism 21 includes a first positioning structure 23, and the main reduction assembly 10 is provided with a second positioning structure adapted to the first positioning structure 23. The positioning mechanism 21 positions the main reduction assembly 10 through the first positioning structure 23 and the second positioning structure. The support part 22 is used to support one end of the half - shaft assembly 20 facing the main reduction assembly 10, and the press head assembly 4 can support the half - shaft assembly 20 from the end far from the main reduction assembly 10. That is to say, the support part 22 and the press head assembly 4 respectively provide support for the half - shaft assembly 20 from both ends.

[0047] When the first positioning structure 23 and the second positioning structure cooperate, and both ends of the half shaft assembly 20 are respectively supported by the support portion 22 and the pressing head assembly 4, the press-fitting conditions are met between the half shaft assembly 20 and the main reduction assembly 10, and the press-fitting conditions are also met between the oil seal and the half shaft assembly 20. The press 3 can act on the pressing head assembly 4 to press the oil seal onto the half shaft assembly 20. After the oil seal press-fitting is completed, the press 3 can push the half shaft assembly 20 through the pressing head assembly 4 to press it onto the main reduction assembly 10, thereby realizing the press-fitting of the oil seal and the half shaft assembly 20 simultaneously during a one-time press-fitting operation.

[0048] That is to say, in the press-fitting equipment of the rear axle assembly provided in this embodiment, the two presses 3 act simultaneously, and the oil seals of the two half shaft assemblies 20 are pressed from both sides simultaneously through the two pressing head assemblies 4. After the oil seal press-fitting is completed, the two presses 3 continue to act, and the two half shaft assemblies 20 are pushed from both sides simultaneously through the two pressing head assemblies 4 to move towards the main reduction assembly 10 until the press-fitting is completed. It can simplify the overall structure of the equipment, simplify the press-fitting process, and effectively improve the press-fitting efficiency of the rear axle assembly, ensuring the production rhythm to meet the requirements of large-scale and high-volume production.

[0049] In the above embodiment, the press 3 is a servo press 3. Of course, the press 3 can also be set as a hydraulic press 3. Compared with the hydraulic press 3, the servo press 3 can avoid noise pollution and oil leakage, and is convenient for monitoring the press-fitting situation and has high press-fitting accuracy. Specifically, the specifications of the servo press 3 can be determined according to the required press-fitting force calculated for the half shaft assembly 20 to be press-fitted, and no specific limitation is made here.

[0050] In the above embodiment, as Figure 4 and Figure 5 shown, the positioning mechanism 21 includes a floating seat 213, a base 211, and a lifting drive member 212 provided on the base 211. The first positioning structure 23 is provided on the upper end surface of the base 211. The floating seat 213 is provided with a support assembly for supporting the main reduction assembly 10. The lifting drive member 212 can drive the floating seat 213 to lift and lower. The top end of the floating seat 213 abuts against the bottom of the main reduction assembly 10 and supports the main reduction assembly 10 from the bottom. Since the height difference between the bottom end face of different series of main reduction assemblies 10 and the center line of the second positioning structure is different, the floating seat 213 is lifted from the bottom by the lifting drive member 212 to adjust the height of the main reduction assembly 10, so that the second positioning structure can cooperate with the first positioning structure 23. The setting of the lifting drive member 212 and the floating seat 213 enables the positioning mechanism 21 to be applicable to different specifications of the main reduction assembly 10, without the need to replace the positioning mechanism 21, with a simple structure and good applicability.

[0051] In the above embodiment, the positioning mechanism 21 further includes at least two sets of support blocks 214. After the lifting drive member 212 drives the floating seat 213 to lift to a preset position, the support blocks 214 can support the floating seat 213. That is to say, for different specifications of the main reducer assembly 10, support blocks 214 with different heights are respectively provided. Or, in this embodiment, the support blocks 214 may not be provided. After the lifting drive member 212 drives the floating seat 213 to lift to a preset position, the lifting drive member 212 can maintain its state unchanged to support the floating seat 213 through the lifting drive member 212, and then support the main reducer assembly 10. The setting of the support blocks 214 can make the support more stable, avoid the situation that the main reducer assembly 10 is not stably supported due to the failure of the lifting drive member 212, etc. At the same time, the setting of the support blocks 214 can also reduce the force application duration of the lifting drive member 212 and extend the service life of the lifting drive member 212.

[0052] Further, as Figure 5 shown, the positioning mechanism 21 includes a pushing member 215 and a sliding member 216. Among them, each support block 214 is fixed to the sliding member 216. The pushing member 215 can push the sliding member 216 to slide, thereby driving each support block 214 to slide. When the lifting drive member 212 jacks up the main reducer assembly 10 to a certain height, the pushing member 215 pushes the sliding member 216 to slide, so that the support block 214 corresponding to the main reducer assembly 10 is located below the floating seat 213. Then, the pushing member 215 stops pushing, and the lifting drive member 212 descends until the floating seat 213 falls above the support block 214. At this time, the first positioning structure 23 and the second positioning structure cooperate. At the same time, the base 211 can also be provided with a slide rail, and the pushing member 215 can push the sliding member 216 to slide along the slide rail to ensure that the support block 214 can support the floating seat 213.

[0053] Furthermore, the positioning mechanism 21 further includes a guiding member. The guiding member includes a guide shaft 217 and a positioning sleeve 218 sleeved outside the guide shaft 217. Among them, the positioning sleeve 218 is arranged in the vertical direction and fixed to the base 211. The guide shaft 217 is arranged between the lifting drive member 212 and the floating seat 213. A flat key is also arranged axially between the guide shaft 217 and the positioning sleeve 218 to prevent relative rotation between the two. The jacking drive member can drive the guide shaft 217 to move up and down along the positioning sleeve 218 to ensure that the main reducer assembly 10 can be stably lifted to the position where the first positioning structure 23 and the second positioning structure cooperate.

[0054] In this embodiment, there are no specific restrictions on the specific structure of the lifting drive member 212, as well as the number and structure of the support blocks 214. As Figure 5As shown, the number of the support blocks 214 can be set to two, and the lifting driving member 212 is a jacking cylinder. The connecting head of the jacking cylinder cooperates with the T-shaped connecting head 219 and can drive the guide shaft 217 to move up and down. When it is necessary to replace different support blocks 214, the jacking cylinder acts and moves the floating seat 213 to the highest position along the positioning sleeve 218 through the guide shaft 217. Then, the pushing member 215 pushes the sliding member 216 to move and pushes the corresponding support block 214 to the lower side of the floating seat 213. Then, the jacking cylinder acts to make the floating seat 213 descend until it abuts against the support block 214. Then, the main reduction assembly 10 is placed on the floating seat 213. The second positioning structure and the first positioning structure 23 cooperate, and then it is pressed by the pressing member 24 to make the position of the main reduction assembly 10 stable.

[0055] In addition, in this embodiment, the positioning mechanism 21 can also be provided with an anti-misalignment switch 25. When installing the main reduction assembly 10, if the main reduction assembly 10 is installed incorrectly (such as the front and back being incorrect), the anti-misalignment switch 25 will give an alarm. Specifically, the anti-misalignment switch 25 can identify the correct installation of the main reduction assembly 10 by being arranged to interfere with the incorrectly installed main reduction assembly 10 and other situations.

[0056] In the above embodiment, as Figure 4 shown, the support portion 22 for supporting one end of the half shaft assembly 20 facing the main reduction assembly 10 is a V-shaped support block detachably connected to the base 211. For half shaft assemblies 20 of different size specifications, to ensure the support stability of the support portion 22 and ensure smooth press-fitting, it is only necessary to replace the corresponding V-shaped support block before installation, and the operation is relatively convenient.

[0057] The press-fitting equipment in this embodiment can simultaneously perform synchronous press-fitting on the main reduction assembly 10, two half shaft assemblies 20 arranged on both sides of the main reduction assembly 10, and two oil seals. Since the press-fitting conditions of the two half shaft assemblies 20 are the same and the structures of the two sets of press head assemblies 4 are the same, for the convenience of description and understanding, in the following embodiments, the press-fitting conditions of the half shaft assembly 20 and the oil seal on one side of the main reduction assembly 10 in the press-fitting equipment will be described in detail.

[0058] In the above embodiment, as Figure 9 and Figure 10As shown in the figure, the indenter assembly 4 includes a centering shaft 41, a pushing block 42, and a positioning shaft 43. The pushing block 42 is sleeved outside the centering shaft 41 and can move axially along the centering shaft 41. Among them, the pushing block 42 is provided with a supporting structure 421, and the supporting structure 421 is used to support the end of the half shaft assembly 20 from the end far away from the main reduction assembly 10. The positioning shaft 43 is fixed to the end of the centering shaft 41 and is adapted to the oil seal. The centering shaft 41 is provided with an abutting member 411. When the press 3 acts on the centering shaft 41 to move it until the oil seal and the half shaft assembly 20 are press-fitted, the abutting member 411 can just abut against the pushing block 42. Then the press 3 continues to act on the centering shaft 41 and pushes the pushing block 42 through the abutting member 411, and then pushes the half shaft assembly 20 to complete the press-fitting between it and the main reduction assembly 10. Since the press 3 is a servo press 3, it can accurately calculate the pushing distance required for its press-fitting, and during the press-fitting process, it can monitor the press-fitting distance in real time to ensure the press-fitting quality.

[0059] Further, the abutting member 411 in this embodiment is further provided with a guiding channel 412, and the guiding channel 412 is arranged along the axial direction of the centering shaft 41. The pushing block 42 is further provided with a guiding block 422, and the guiding block 422 can slide along the guiding channel 412. With such a setting, when the press 3 is acted on for press-fitting, the press-fitting stability can be ensured.

[0060] Furthermore, the indenter assembly 4 further includes a spring 44, and the spring 44 is arranged between the centering shaft (41) and the pushing block (42). The abutting member 411 can be set to include a fixing member and a limiting member. Among them, the fixing member is fixed to the positioning shaft 43, and the limiting member is arranged on the side of the fixing member facing the pushing block 42. The limiting member is provided with the above-mentioned guiding channel 412, and the spring 44 is clamped between the centering shaft and the pushing block 42. Of course, in this embodiment, the specific structure of the positioning shaft 43 is not limited. For example, the spring 44 can also be set to be fixed at one end to the positioning shaft 43 and fixed at the other end to the pushing block 42. The setting of the spring 44 can act on the pushing block 42 to make it move toward the half shaft assembly 20 to play a supporting role for the half shaft assembly 20. For example, before press-fitting, first position and clamp the main reduction assembly 10 through the positioning mechanism 21, then assemble the oil seal with the indenter assembly 4, and then support one end of the half shaft assembly 20 on the supporting part 22, and the other end cooperates with the pushing block 42. Specifically, first push the pushing block 42 toward the press 3 side to compress the spring 44, and then place the half shaft assembly 20 well and withdraw the thrust on the pushing block 42. The pushing block 42 will move toward the half shaft assembly 20 under the action of the restoring force of the spring 44 until the supporting structure 421 cooperates with the flange inner hole of the half shaft assembly 20 to achieve the supporting effect. The setting of the spring 44 can facilitate the installation of the half shaft assembly 20, and the spring 44 can provide a thrust to the pushing block 42 toward the half shaft assembly 20 side, so that the two keep stable positions during the oil seal press-fitting process.

[0061] When the press 3 pushes the centering shaft 41 to move until the press-fitting of the oil seal and the half shaft assembly 20 is completed, the abutting member 411 can just abut against the pushing block 42. Therefore, as Figure 10 shown, when the spring 44 is in the natural state, the distance H between the pushing block 42 and the abutting member 411 is the distance that the oil seal moves during the press-fitting process of the oil seal. For different half shaft assemblies 20, different oil seals are used. Only the corresponding pressing head assembly 4 needs to be replaced, and the applicability is good.

[0062] In the above embodiment, the press-fitting device further includes an angle adjustment device. The angle adjustment device includes a measuring part 51, a calculating part, and an adjusting part 52. Among them, the measuring part 51 includes a driving part and two displacement sensors arranged at intervals in the vertical direction. Specifically, the two displacement sensors are respectively an upper displacement sensor located above and a lower displacement sensor located below. The driving part can simultaneously drive the two displacement sensors to move towards the spring plate mounting seat 201 until the measuring heads of the two displacement sensors both abut against the spring plate mounting seat 201 of the half shaft assembly 20. Then, the calculating part can calculate the inclination angle of the spring plate mounting seat 201 according to the distance between the two displacement sensors and their respective moving distances. The specific calculation method is as follows, as Figure 11 shown, the distance from the starting point to the ending point of the upper measuring head of the upper displacement sensor is L1, and the distance from the starting point to the ending point of the lower measuring head of the lower displacement sensor is L2. The upper measuring head walks more than the lower measuring head by L1 - L2. The distance L0 between the first displacement sensor and the second displacement sensor is a known quantity. Then, the inclination angle θ of the spring plate mounting seat 201 can be calculated according to the following formula:

[0063]

[0064] Finally, the adjusting part 52 can drive the half shaft assembly 20 to rotate through the pressing head assembly 4 until the inclination angle is within the preset angle range. That is to say, when the adjusting part 52 drives the half shaft assembly 20 to rotate through the pressing head assembly 4, the dimensions of L1 and L2 change in real time, while L0 remains unchanged. The calculating part calculates the inclination angle θ according to L1 and L2 in real time. When the inclination angle θ is within the allowable design tolerance range, the angle adjustment can be stopped and the press-fitting operation can be carried out.

[0065] The above angle adjustment device is applicable to the press-fitting of the half shaft assembly 20 of the leaf spring bridge provided with the spring plate mounting seat 201. For the press-fitting of the half shaft assembly 20 of the swing arm bridge, after its two ends are respectively supported by the supporting part 22 and the pressing head assembly 4, the press-fitting operation can be carried out.

[0066] Specifically, in this embodiment, both displacement sensors are fixed to the moving plate, and the driving member drives the moving plate to move, so as to drive the two displacement sensors to move simultaneously. Specifically, the driving member can be a cylinder, a hydraulic cylinder, or a combination of a motor and a lead screw, etc., without specific limitation here.

[0067] Furthermore, as Figures 6 - 8 shown, the adjusting portion 52 includes a motor 521 and a gear assembly 522. Among them, the motor 521 can drive the centering shaft 41 of the pressing head assembly 4 to rotate through the gear assembly 522. A rotation limiting positioning pin 45 is further provided between the end face of the pushing block 42 and the flange hole end face of the half shaft assembly 20. When the supporting structure 421 of the pushing block 42 supports the end of the half shaft assembly 20, the rotation limiting positioning pin 45 can limit the relative rotation between the pushing block 42 and the half shaft assembly 20. At this time, when the motor 521 drives the centering shaft 41 of the pressing head assembly 4 to rotate through the gear assembly 522, the pushing block 42 can drive the half shaft assembly 20 to rotate through the rotation limiting positioning pin 45, thereby realizing the angle adjustment of the spring plate mounting seat 201.

[0068] In the above embodiment, as Figure 1 and Figure 2 shown, the pile pressing device further includes a feeding device 6 for feeding oil seals. Specifically, the feeding device 6 includes a storage part, a feeding channel, a blocking cylinder, and a moving part. Among them, the storage part is used to store oil seals, the feeding channel is arranged vertically, the storage part and the feeding channel are communicated, and a blocking member, a releasing member, and a blanking photoelectric switch are further provided between them. The blocking member is used to block the oil seals in the storage part from falling into the feeding channel. One oil seal can be accommodated in the space between the releasing member and the blocking member. The releasing member can release the oil seal between the releasing member and the blocking member so that it falls to the moving part. With such a setting, it can be ensured that only one oil seal falls to the moving part at a time, realizing precise control.

[0069] When the blanking photoelectric switch senses that an oil seal has passed by, it means that the oil seal between the blocking switch and the releasing switch has fallen to the moving part. At this time, the releasing switch is closed and the blocking switch is opened. The lowermost oil seal in the storage part will fall between the blocking switch and the releasing switch, and when the releasing switch is opened, the blocking switch is closed. The feeding device 6 can realize the automatic installation of oil seals without manual operation, thereby improving the pressing efficiency. Specifically, the coordinated actions of the above-mentioned blocking switch, releasing switch, and blanking photoelectric switch can be controlled through a circuit. This circuit control is well-known prior art to those skilled in the art and will not be elaborated here to save space. In addition, the blocking switch and the releasing switch can be selected as cylinders, or can also be set as a combined structure of a motor and a lead screw.

[0070] Further, an anti-misalignment photoelectric induction switch is also provided in the feeding channel. When the anti-misalignment photoelectric induction switch senses that the direction of the oil seal entering the feeding channel is incorrect (i.e., the front and back are placed incorrectly), an alarm can be issued so that the operator can adjust the oil seal in time to avoid errors.

[0071] In the above embodiment, the press-fitting device further includes an electrical cabinet 7 and a protective net 8. Among them, the servo motor 521 is located inside the protective net 8. At the same time, an operation platform 9 is also provided on the outer wall of the protective net 8, which is convenient for the overall automatic control of the press-fitting device. The operation platform 9 can make the press-fitting process of the half shaft assembly 20 more intuitive and can realize automatic data storage to achieve quality traceability of the press-fitted products.

[0072] In addition, in this embodiment, a blanking buffer area is also provided on the frame 1 of the pile pressing device. After the half shaft assembly 20, the oil seal and the main reduction assembly 10 are press-fitted, they can be moved to the blanking buffer area by a robotic arm. The setting of this buffer area is convenient for matching the truss-type handling robot in the next process to realize automatic handling and offline transfer of the product.

[0073] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements can be made without departing from the principle of the present invention, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A press-fitting device for a rear axle assembly, characterized in that, It includes a frame (1), a pressing area (2) provided on the frame (1), two groups of presses (3) and two groups of press head assemblies (4). The pressing area (2) is located between the two groups of press head assemblies (4), and the press head assemblies (4) are used for pressing oil seals. The pressing area (2) includes a positioning mechanism (21) and two supporting parts (22) respectively located on both sides of the positioning mechanism (21). The positioning mechanism (21) is used for positioning the main reduction assembly (10). The positioning mechanism (21) includes a first positioning structure (23), and the main reduction assembly (10) includes a second positioning structure adapted to the first positioning structure (23). The supporting part (22) and the press head assembly (4) can respectively support the half shaft assembly (20) from both ends. After the first positioning structure (23) and the second positioning structure cooperate, the press (3) can act on the press head assembly (4) to press the oil seal onto the half shaft assembly (20) and push the half shaft assembly (20) to press it onto the main reduction assembly (10). The positioning mechanism (21) includes a floating seat (213), a base (211) and a lifting driving member (212) provided on the base (211). The first positioning structure (23) is provided on the upper end surface of the base (211). The floating seat (213) can support the main reduction assembly (10) from the bottom, and the lifting driving member (212) can drive the floating seat (213) to lift and lower. The press head assembly (4) includes a centering shaft (41), a pushing block (42), and a positioning shaft (43). The pushing block (42) is sleeved outside the centering shaft (41) and can move axially along the centering shaft (41). The pushing block (42) is provided with a supporting structure (421) for supporting the end flange hole of the half shaft assembly (20). The positioning shaft (43) is fixed to the end of the centering shaft (41) and is adapted to the oil seal. The centering shaft (41) is provided with an abutting member (411). After the press (3) pushes the centering shaft (41) to move until the oil seal is pressed onto the half shaft assembly (20), the abutting member (411) abuts against the pushing block (42) and pushes the pushing block (42) to press the half shaft assembly (20) and the main reduction assembly (10). The abutting member (411) is provided with a guiding channel (412) arranged along the axial direction of the centering shaft (41), and the pushing block (42) is further provided with a guiding block (422) that can slide along the guiding channel (412). The press head assembly (4) further includes a spring (44), and the spring (44) is clamped between the centering shaft (41) and the pushing block (42).

2. The press-fitting device according to claim 1, characterized in that, The press (3) is a servo press (3).

3. The press-fitting device according to claim 1, characterized in that, The positioning mechanism (21) further includes at least two groups of supporting blocks (214). After the lifting driving member (212) drives the floating seat (213) to lift and lower to a preset position, the supporting blocks (214) can support the floating seat (213).

4. The press-fitting device according to claim 3, characterized in that, The positioning mechanism (21) further includes a pushing member (215) and a sliding member (216). Each of the support blocks (214) is fixed to the sliding member (216). The pushing member (215) can push the sliding member (216) to slide and drive the support blocks (214) to move.

5. The press-fitting device according to claim 4, characterized in that, The positioning mechanism (21) further includes a guiding member. The guiding member includes a guide shaft (217) and a positioning sleeve (218) fixed to the base (211). The axis of the positioning sleeve (218) is arranged in the vertical direction and sleeved outside the guide shaft (217). The guide shaft (217) is arranged between the lifting driving member (212) and the floating seat (213). A flat key arranged axially is further provided between the guide shaft (217) and the positioning sleeve (218).

6. The press-fitting device according to any one of claims 1-5, characterized in that, The support portion (22) is a V-shaped support block detachably connected to the base (211).

7. The press-fitting device according to any one of claims 1-5, characterized in that, It further includes an angle adjustment device. The angle adjustment device includes a measurement portion (51), a calculation portion, and an adjustment portion (52). The half shaft assembly (20) is further provided with a spring plate mounting seat (201). The measurement portion (51) includes a driving member and two displacement sensors arranged at intervals in the vertical direction. The driving member can simultaneously drive the two displacement sensors to move towards the spring plate mounting seat (201) until they abut against the spring plate mounting seat (201). The calculation portion can calculate the inclination angle of the spring plate mounting seat (201) according to the distance between the measuring heads of the two displacement sensors and the moving distance. The adjustment portion can drive the half shaft assembly (20) to rotate through the pressing head assembly (4) until the inclination angle is within a preset angle range. The adjustment portion (52) includes a motor (521) and a gear assembly (522). The motor (521) can drive the centering shaft (41) to rotate through the gear assembly (522). A rotation limiting positioning pin (45) is provided between the end face of the pushing block (42) and the end face of the flange hole of the half shaft assembly (20).

8. The press-fitting device according to any one of claims 1-5, characterized in that, It further includes a feeding device (6). The feeding device (6) includes a material storage portion, a feeding channel, a blocking cylinder, and a moving portion. The material storage portion is used for storing the oil seal. The feeding channel is arranged in the vertical direction. The oil seal in the material storage portion can fall into the moving portion along the feeding channel under the action of gravity. The moving portion can move the oil seal to cooperate with the pressing head assembly (4). A blocking member, a releasing member, and a blanking photoelectric switch are further provided between the material storage portion and the feeding channel.

9. The press-fitting device according to claim 8, wherein The feeding device (6) is further provided with a wrong insertion prevention photoelectric induction switch.

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