Electric drive axle gearbox differential assembly tool

Abstract

The utility model relates to an assembly tool for an electric drive axle gearbox differential mechanism. The assembly tool comprises an assembly boxing system and a positioning support system. The assembly boxing system comprises a hoisting bottom plate, a clamping jaw mechanism and a first positioning matching mechanism, the clamping jaw mechanism and the first positioning matching mechanism are both arranged at the bottom of the hoisting bottom plate, and the clamping jaw mechanism is used for clamping and releasing a differential mechanism assembly; the positioning support system comprises a box body positioning plate, a box body positioning assembly and a second positioning matching mechanism, the box body positioning assembly and the second positioning matching mechanism are arranged on the top of the box body positioning plate, the box body positioning assembly is used for being matched and fixed with a gearbox body, and the second positioning matching mechanism is matched with the first positioning matching mechanism and used for achieving coaxial positioning of the differential mechanism assembly and the gearbox body.

Description

Technical Field

[0001] This utility model relates to the field of differential manufacturing and assembly technology, and in particular to an assembly fixture for an electric drive axle gearbox differential. Background Technology

[0002] Currently, pure electric heavy-duty commercial trucks mainly use two drive methods to transmit vehicle power: central electric drive and electric drive axle. Among them, the electric drive axle shows greater development potential due to its advantage of requiring less installation space. An important feature of the electric drive axle is that the gearbox and axle housing are integrated into one unit, forming a compact design. While this improves space utilization, it also increases the difficulty of assembly.

[0003] In the assembly process of the electric drive axle, the installation of the differential assembly is a crucial step. Because the differential assembly itself is large and heavy, and requires precise positioning and installation, traditional assembly methods struggle to guarantee assembly quality and efficiency.

[0004] Existing technologies include some differential assembly assembly and disassembly fixtures. These fixtures use a lifting and balancing mechanism to hook the differential assembly placed on a support, raise it to a certain height, install a locking anti-slip mechanism, and then move the differential assembly into the main reducer housing by operating the lifting equipment. While these fixtures allow for some individual assembly and disassembly of the differential assembly, they are primarily suitable for the assembly and disassembly of differential assemblies on traditional mechanical rear axles.

[0005] For integrated electric drive axles, existing technologies have obvious shortcomings: existing tooling lacks a precise positioning mechanism during the loading process, which makes it impossible to ensure coaxiality with the mounting holes when the differential is lowered into the gearbox; furthermore, the limit bolts and hooks of the lifting and balancing mechanism need to be installed manually, which affects assembly efficiency; in addition, the hooks of the lifting and balancing mechanism are often located on the same side, which poses a risk of the differential assembly falling off during the lifting process. Utility Model Content

[0006] This utility model discloses an assembly fixture for an electric drive axle gearbox differential, which aims to solve the technical problems existing in the prior art.

[0007] The present invention adopts the following technical solution:

[0008] This utility model embodiment provides an assembly fixture for an electric drive axle transmission differential, including an assembly housing system and a positioning support system;

[0009] The assembly loading system includes a lifting base plate, a gripper mechanism, and a first positioning and mating mechanism. Both the gripper mechanism and the first positioning and mating mechanism are located at the bottom of the lifting base plate. The gripper mechanism is used to clamp and release the differential assembly.

[0010] The positioning support system includes a housing positioning plate and a housing positioning component and a second positioning mating mechanism disposed on its top. The housing positioning component is used to mate with and fix the gearbox housing. The second positioning mating mechanism and the first positioning mating mechanism are matched with each other to achieve coaxial positioning of the differential assembly and the gearbox housing.

[0011] As a preferred technical solution, the bottom of the gripper mechanism is provided with a differential positioning shaft, the position of which corresponds to the rear housing hole of the differential assembly; the assembly housing system also includes a pre-positioning pin, which is set on one side of the gripper mechanism and its position corresponds to the fork shaft hole of the differential assembly, and is used to complete the dual-point positioning of the differential assembly together with the differential positioning shaft.

[0012] As a preferred technical solution, the first positioning and mating mechanism includes a pair of first positioning blocks and a pair of first fixing columns. The pair of first positioning blocks are located at two opposite corners of the hoisting base plate and extend downwards; the pair of first fixing columns are located at the other two opposite corners of the hoisting base plate and also extend downwards.

[0013] The second positioning and mating mechanism includes a pair of second positioning posts and a pair of second fixing posts. The pair of second positioning posts are located at two opposite corners of the housing positioning plate and extend upward to match and connect with a pair of first positioning blocks. The pair of second fixing posts are located at the other two opposite corners of the housing positioning plate and also extend upward to match and connect with a pair of first fixing posts.

[0014] As a preferred technical solution, the first positioning block and the second positioning post are configured as a plug-in structure, and the first fixing post and the second fixing post are configured as a plug-in structure.

[0015] As a preferred technical solution, the gearbox positioning component includes a contoured positioning post and a gearbox positioning block. The contoured positioning post extends upward to match the side profile of the gearbox, and the gearbox positioning block is located on the top surface of the gearbox positioning plate to match the bottom profile of the gearbox.

[0016] As a preferred technical solution, the gripper mechanism includes a guide rail base plate, a cylinder device, and a differential gripper.

[0017] The guide rail base plate is fixed to the bottom of the hoisting base plate via a positioning connecting shaft, and the differential positioning shaft is set on the guide rail base plate;

[0018] The cylinder assembly is fixed to the guide rail base plate and is used to provide the power source for clamping and releasing;

[0019] The differential grippers open and close via a cylinder drive to clamp and release the differential assembly.

[0020] As a preferred technical solution, the gripper mechanism also includes a guide rail, a slider, a lifting fixing plate, a lifting side plate, a gripper connecting plate, and a gripper fixing plate;

[0021] The lifting fixed plate is connected to the cylinder device to receive the driving force of the cylinder device; the lifting side plate is fixed on the lifting fixed plate; the gripper connecting plate and the gripper fixed plate are connected to the lifting side plate as a whole through the fixed shaft; the guide rail is fixed on the guide rail base plate, and the slider is fixed on the gripper fixed plate and slidably connected to the guide rail;

[0022] The differential gripper is fixed to the gripper fixing plate. When the cylinder device drives the lifting fixing plate and the lifting side plate to rise and fall, the differential gripper achieves clamping or releasing of the differential assembly through the sliding between the guide rail and the slider.

[0023] As a preferred technical solution, the cylinder device includes a cylinder body, a cylinder lifting mechanism, and a cylinder inlet / outlet quick connector. The cylinder inlet / outlet quick connector is used to allow air to enter and exit the cylinder body, thereby enabling the lifting action of the cylinder lifting mechanism.

[0024] As a preferred technical solution, the assembly loading system also includes a pneumatic switch, a first lifting ring, and a first handle;

[0025] A pneumatic switch is mounted on the lifting base plate to control the gripping and releasing of the gripper mechanism; the first lifting ring is fixed to the top of the lifting base plate to cooperate with the lifting equipment to complete the lifting of the differential assembly; the first handle is fixed to the lifting base plate through the handle mounting block for moving the assembly into the box system.

[0026] As a preferred technical solution, the positioning support system also includes a second lifting ring and a second handle. The second lifting ring is fixed to the box positioning plate and is used to transfer the positioning support system by lifting equipment. The second handle is fixed to the box positioning plate by a handle mounting block and is used for short-distance movement of the positioning support system.

[0027] One embodiment of the above-described utility model has the following advantages or beneficial effects:

[0028] This utility model mainly provides an assembly fixture for an electric drive axle transmission differential. Compared with the prior art, the embodiment of this utility model solves the problems of low positioning accuracy, difficult operation, and low assembly efficiency that exist in the traditional manual assembly of electric drive axle differentials through the coordinated cooperation of the assembly box system and the positioning support system.

[0029] Specifically, the tooling adopts a dual-point positioning method combining the differential positioning shaft and the pre-positioning pin, which realizes the precise positioning and clamping of the differential assembly; the first positioning mating structure at the bottom of the lifting base plate matches the second positioning mating mechanism on the housing positioning plate, ensuring the coaxial positioning of the differential assembly and the gearbox housing, effectively preventing eccentricity and jamming during the assembly process; the pneumatically controlled gripper mechanism can stably clamp the differential assembly, and through the precise guidance of the guide rail and slider, the differential assembly is smoothly placed into the housing.

[0030] Furthermore, the contour-following positioning pins and positioning blocks in the gearbox housing positioning assembly precisely match the contour of the gearbox housing, ensuring the stable fixation of the gearbox housing during assembly; the addition of lifting rings and handles facilitates the movement and transfer of tooling, improving operational flexibility.

[0031] This invention enables precise positioning, smooth insertion, and efficient assembly of the electric drive axle differential. It can be operated by a single person, significantly improving assembly accuracy and efficiency, reducing the labor intensity of workers, and minimizing the risk of human error and component damage during assembly. It has good industrial practical value. At the same time, this assembly fixture can also be used for the disassembly of the differential assembly, further expanding its application scope. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of this utility model. The illustrative embodiments of this utility model and their descriptions explain this utility model and do not constitute an improper limitation of this utility model. In the accompanying drawings:

[0033] Figure 1 This is a schematic diagram of the structure of the electric drive axle gearbox differential assembly tooling provided in a preferred embodiment of Embodiment 1 of this utility model;

[0034] Figure 2 This is a schematic diagram of the assembly box system provided in a preferred embodiment of Embodiment 1 of the present utility model;

[0035] Figure 3 This is a schematic diagram of the positioning support system provided in a preferred embodiment of this utility model;

[0036] Figure 4 This is a schematic diagram of the gripper mechanism provided in a preferred embodiment of Embodiment 1 of the present invention;

[0037] Figure 5 This is a front view of a gripper mechanism provided in a preferred embodiment of Embodiment 1 of the present utility model;

[0038] Figure 6 for Figure 5 Sectional view along axis AA;

[0039] Figure 7 This is a schematic diagram of the cylinder device provided in a preferred embodiment of this utility model;

[0040] Figure 8 This is a front view of a cylinder device provided in a preferred embodiment of this utility model;

[0041] Figure 9 for Figure 8 BB-direction sectional view.

[0042] Explanation of reference numerals in the attached figures:

[0043] Assembly loading system 10, pneumatic switch 11, gripper mechanism 12, lifting fixing plate 121, lifting side plate 122, gripper connecting plate 123, gripper fixing plate 124, differential gripper 125, differential positioning shaft 126, guide rail 127, slider 128, guide rail base plate 129, cylinder device 1210, cylinder lifting mechanism 12101, cylinder body 12102, cylinder inlet / outlet quick connector 12103, first lifting ring 13, first handle 14, lifting base plate 15, first positioning block 16, first fixing column 17, pre-positioning pin 18, positioning support system 20, housing positioning plate 21, contour positioning column 22, housing positioning block 23, second lifting ring 24, second handle 25, second positioning column 26, second fixing column 27. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this utility model, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly stated otherwise.

[0045] In the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0047] Currently, the assembly of electric drive axle transmission differentials is characterized by difficult positioning and high assembly precision requirements. Due to the small clearance between the differential assembly and the transmission housing, traditional manual assembly methods are prone to problems such as inaccurate positioning, jamming, or damage to parts. In addition, the differential assembly is heavy, making manual handling and precise positioning difficult, which increases the labor intensity and safety risks for workers.

[0048] To achieve precise positioning and smooth insertion of the differential assembly into the gearbox during assembly, this utility model provides an assembly fixture for the differential of an electric drive axle transmission, such as... Figure 1The assembly fixture includes an assembly housing system 10 and a positioning support system 20. During assembly, the assembly housing system 10 is located on top and is used to clamp the differential assembly, while the positioning support system 20 is located on the bottom and is used to position and fix the gearbox housing.

[0049] In a preferred embodiment, the electric drive axle transmission includes a housing and a differential assembly. The housing has a cavity for accommodating the differential assembly, the opening of which is located on one side. The bottom of the housing has a support surface with a specific profile for mating with the positioning support system 20. The sides of the housing have several positioning grooves and fixing holes for positioning and fixing after assembly. The differential assembly mainly consists of a differential housing, an internal gear set, and a shaft assembly. The rear of the differential housing has a rear housing hole, and the sides of the housing have fork shaft holes. During assembly, the differential assembly needs to be precisely installed into the cavity of the electric drive axle transmission housing while maintaining coaxiality to ensure the accuracy requirements of subsequent gear meshing and bearing installation.

[0050] like Figure 2 In a preferred embodiment, the assembly loading system 10 includes a lifting base plate 15, a gripper mechanism 12, a pre-positioning pin 18, and a first positioning engagement mechanism. The gripper mechanism 12, the pre-positioning pin 18, and the first positioning engagement mechanism are all fixedly installed on the bottom of the lifting base plate 15. The lifting base plate 15 is used for lifting or daily handling. The gripper mechanism 12 is used to grip and release the differential assembly. The bottom of the gripper mechanism 12 is provided with a differential positioning shaft 126, the position of which corresponds to the rear housing hole of the differential assembly. The pre-positioning pin 18 is provided on one side of the gripper mechanism 12, the position of which corresponds to the fork shaft hole of the differential assembly. The pre-positioning pin 18 can work with the differential positioning shaft 126 to complete the dual-point positioning of the differential assembly.

[0051] like Figure 3 In a preferred embodiment, the positioning support system 20 includes a housing positioning plate 21, a housing positioning assembly, and a second positioning mating mechanism. Both the housing positioning assembly and the second positioning mating mechanism are installed and fixed on the top of the housing positioning plate 21. The housing positioning plate 21 is used to place the gearbox housing. The housing positioning assembly is used to mate with and fix the gearbox housing. The second positioning mating mechanism and the first positioning mating mechanism are matched with each other to achieve coaxial positioning of the differential assembly and the gearbox housing.

[0052] In a preferred embodiment, the lifting base plate 15 has a rectangular structure and is preferably made of metal. First lifting rings 13 are fixedly provided on both sides of the top of the lifting base plate 15. The first lifting rings 13 are used to cooperate with lifting equipment in the factory to complete the lifting operation of the differential assembly. A first handle 14 is also provided on the side of the lifting base plate 15. The first handle 14 is fixed to the lifting base plate 15 by a handle mounting block and is used by operators for gripping and daily handling, so as to achieve short-distance movement or precise positioning adjustment of the assembly into the housing system 10. The bottom of the lifting base plate 15 is provided with mounting holes and mounting slots for mounting the gripper mechanism 12, the pre-positioning pin 18, and the first positioning and mating mechanism. In this embodiment, the position, size, and number of mounting holes and mounting slots are not specifically limited.

[0053] In a preferred embodiment, the gearbox positioning plate 21 is also made of metal, and a second handle 25 is provided on its side. The second handle 25 is also fixed by a handle mounting block, which is used by the operator to move the positioning support system 20 a short distance. The top of the gearbox positioning plate 21 is also provided with a second lifting ring 24, which is located on both sides of the positioning plate, and is used to transfer and accurately place the positioning support system 20 by means of lifting equipment. Furthermore, the top of the gearbox positioning plate 21 is provided with a dedicated mounting position / mounting hole for mounting the gearbox positioning component and the second positioning mating mechanism, ensuring that the gearbox positioning component can accurately mate with the gearbox housing, and at the same time ensuring that the second positioning mating mechanism and the first positioning mating mechanism can achieve precise alignment and matching.

[0054] Specifically, the position of the second positioning and matching mechanism matches the position of the first positioning and matching mechanism. The setting position of the gearbox positioning component is configured based on the specific outline of the gearbox housing. In this embodiment, no specific limitation is made. Those skilled in the art can make adaptive adjustments according to the actual shape of the gearbox housing.

[0055] In a preferred embodiment, the first positioning and mating mechanism includes a pair of first positioning blocks 16 and a pair of first fixing posts 17. The pair of first positioning blocks 16 are disposed at two opposite corners of the hoisting base plate 15 and extend downward; the pair of first fixing posts 17 are disposed at the other two opposite corners of the hoisting base plate 15 and also extend downward. The second positioning and mating mechanism includes a pair of second positioning posts 26 and a pair of second fixing posts 27. The pair of second positioning posts 26 are disposed at two opposite corners of the box positioning plate 21 and extend upward, for matching and connecting with the pair of first positioning blocks 16; the pair of second fixing posts 27 are disposed at the other two opposite corners of the box positioning plate 21 and also extend upward, for matching and connecting with the pair of first fixing posts 17.

[0056] Preferably, the first positioning block 16 and the second positioning post 26 are configured as a plug-in structure, and the first fixing post 17 and the second fixing post 27 are configured as a plug-in structure.

[0057] In a preferred embodiment, the first positioning block 16 has a cylindrical structure and a tapered guide surface at the bottom for easy initial alignment with the second positioning post 26. To achieve a stable connection and positioning accuracy with the second positioning post 26, the bottom surface of the first positioning block 16 may further be provided with an annular groove. The second positioning post 26 is also cylindrical with a groove at the top, which is adapted to the tapered guide surface at the bottom of the first positioning block 16. An annular protrusion is further provided inside the groove, and the annular protrusion is fitted into the annular groove at the bottom of the first positioning block 16 to achieve high-precision positioning and stable connection.

[0058] In a preferred embodiment, the first fixing post 17 is also cylindrical, and its height can be configured to be flush with the first positioning block 16. The bottom of the first fixing post 17 is provided with a through hole, and a positioning step is machined inside the through hole for cooperating with the top limiting part of the second fixing post 27. The top of the second fixing post 27 is provided with a limiting part that cooperates with the bottom through hole of the first fixing post 17 to realize the insertion between the two.

[0059] Preferably, the plug-in structure of the first positioning block 16 and the second positioning post 26 can also adopt other designs, such as the cooperation of a square boss and a square groove, the cooperation of a V-shaped groove and a wedge block, the cooperation of a dovetail groove and a dovetail guide rail 127, etc. These cooperation forms can all achieve precise positioning, but they have different focuses in terms of resistance to lateral force and rotation. Those skilled in the art can make adaptive adjustments and selections according to actual needs. In addition, other plug-in structures can also be selected between the first fixing post 17 and the second fixing post 27, such as bolt connection or snap-fit ​​connection structure. These will not be listed one by one in this embodiment.

[0060] In a preferred embodiment, the gearbox positioning assembly on the gearbox positioning plate 21 includes a contoured positioning post 22 and a gearbox positioning block 23. The contoured positioning post 22 extends upward to match the side profile of the gearbox housing, and the gearbox positioning block 23 is disposed on the top surface of the gearbox positioning plate 21 to match the bottom profile of the gearbox housing.

[0061] Preferably, the shape of the contour positioning post 22 is set according to the side profile features of the gearbox housing. Its height, position and shape are not specifically limited in this embodiment. Those skilled in the art can make adaptive configurations according to the profile of the gearbox housing.

[0062] Preferably, at least two contour positioning posts 22 are provided, located on both sides of the gearbox positioning plate 21, to provide stable lateral support and prevent the gearbox housing from tilting or shifting during assembly.

[0063] Preferably, the housing positioning block 23 is fixed to the top surface of the housing positioning plate 21 by an embedded design. The installation position is precisely determined according to the feature points of the bottom of the gearbox housing. Its structure is completely matched with the bottom contour of the gearbox housing. The specific structure can be adapted to the gearbox housing.

[0064] In a preferred embodiment, the gearbox positioning block 23 is configured as a modular structure, which can be quickly replaced according to different models of gearbox housings to improve the versatility of the tooling; preferably, the gearbox positioning block 23 is installed using a quick-change structure and is fixed to the gearbox positioning plate 21 by a quick locking device. When replacing, only the locking device needs to be operated, and no tools are required, which greatly reduces the tooling adjustment time.

[0065] like Figure 4 — Figure 5 In a preferred embodiment, the gripper mechanism 12 includes a guide rail base plate 129, a cylinder assembly 1210, a differential gripper 125, a guide rail 127, a slider 128, a lifting fixing plate 121, a lifting side plate 122, a gripper connecting plate 123, and a gripper fixing plate 124. The guide rail base plate 129 is fixed to the bottom of the lifting base plate 15 via a positioning connecting shaft, and the differential positioning shaft 126 is disposed on the guide rail base plate 129. The cylinder assembly 1210 is fixed to the guide rail base plate 129 and provides the power source for gripping and releasing. The lifting fixing plate 121 is connected to the cylinder assembly 1210 and receives the cylinder assembly. The driving force of 1210; the lifting side plate 122 is fixed on the lifting fixed plate 121; the gripper connecting plate 123 and the gripper fixing plate 124 are connected to the lifting side plate 122 as a whole through the fixed shaft; the guide rail 127 is fixed on the guide rail base plate 129, the slider 128 is fixed on the gripper fixing plate 124 and is slidably connected to the guide rail 127; the differential gripper 125 is fixed on the gripper fixing plate 124. When the cylinder device 1210 drives the lifting fixed plate 121 and the lifting side plate 122 to rise and fall, the differential gripper 125 achieves clamping or releasing of the differential assembly through the sliding between the guide rail 127 and the slider 128.

[0066] Preferably, the guide rail base plate 129 has a rectangular structure and is fixedly connected to the bottom of the lifting base plate 15 through multiple sets of positioning connecting shafts; the differential positioning shaft 126 is vertically fixed at the center of the guide rail base plate 129 and is preferably configured as a cylindrical structure with a diameter that matches the size of the differential assembly rear housing hole, and has a chamfer on the top to facilitate assembly.

[0067] like Figure 7 — Figure 9Preferably, the cylinder device 1210 includes a cylinder body 12102, a cylinder lifting mechanism 12101, and a cylinder inlet / outlet quick connector 12103. The cylinder inlet / outlet quick connector 12103 is used to allow air to enter and exit the cylinder body 12102, thereby realizing the lifting action of the cylinder lifting mechanism 12101. The top of the lifting base plate 15 is also provided with a pneumatic switch 11, which is electrically connected to the cylinder device 1210. By controlling the position of the pneumatic switch 11, the operator can achieve precise control of the cylinder lifting mechanism 12101 and complete the gripping and releasing actions of the gripper.

[0068] Preferably, the lifting fixed plate 121 has a connecting seat in the center, which is fixedly connected to the cylinder lifting mechanism 12101; the lifting side plate 122 is connected to the lifting fixed plate 121 by high-strength bolts to form a stable lifting support structure; the lifting side plate 122 has connecting holes on both sides for installing the fixing shaft, and the gripper connecting plate 123 is connected to the lifting side plate 122 by the fixing shaft; the gripper fixing plate 124 and the gripper connecting plate 123 are connected to each other by high-strength bolts to form a stable gripper support structure. The bottom of the gripper fixing plate 124 is provided with a mounting seat for installing the slider 128.

[0069] Preferably, the guide rail 127 is a linear guide rail 127 and is fixedly mounted on the guide rail base plate 129. The slider 128 matches the guide rail 127 to achieve corresponding linear movement. The slider 128 is fixed to the bottom of the gripper fixing plate 124 by bolts. The configuration of the guide rail 127 and the slider 128 enables precise guidance of the gripper mechanism 12, allowing the differential gripper 125 to move smoothly along a predetermined trajectory during clamping and release, avoiding jamming and deviation.

[0070] In a preferred embodiment, the differential gripper 125 is configured with two pairs of symmetrically arranged gripper arms, forming a "cross-shaped" gripping mechanism. This allows for simultaneous gripping of the differential assembly from four directions, providing a uniformly distributed gripping force and preventing eccentricity and imbalance during the gripping process. Preferably, the gripping ends of the gripper arms are designed with contoured gripping surfaces that match the shape of the differential assembly. These gripping surfaces are covered with anti-slip rubber material to increase friction and prevent the differential assembly from slipping out during gripping.

[0071] Specifically, the working principle of the gripper mechanism 12 is as follows:

[0072] The operator activates the solenoid valve of the cylinder device 1210 by controlling the pneumatic switch 11 on the top of the hoisting base plate 15. The solenoid valve controls the airflow direction of the cylinder inlet and outlet quick connector 12103, thereby changing the pressure inside the cylinder body 12102. When the pneumatic switch 11 controls the bottom of the cylinder body 12102 to take in air and the top to exhaust air, the cylinder lifting mechanism 12101 retracts, pushing the lifting fixing plate 121 downward, which in turn drives the lifting side plate 122, the gripper connecting plate 123, and the gripper fixing plate 124 to descend synchronously. The gripper fixing plate 124 slides smoothly on the guide rail 127 via the slider 128, which drives the differential gripper 125 downward and opens, releasing the differential assembly. When the pneumatic switch 11 controls the top of the cylinder body 12102 to take in air and the bottom to exhaust air, the cylinder lifting mechanism 12101 extends, pushing the entire gripper mechanism 12 upward, closing the gripper arm, and achieving a stable clamping of the differential assembly. The clamping force of the grippers can be controlled by adjusting the working air pressure of the cylinder to ensure that the differential assembly is firmly clamped without damaging the parts due to excessive clamping force.

[0073] Compared with existing technologies, this embodiment achieves precise positioning, smooth insertion, and efficient assembly of the electric drive axle differential, significantly improving assembly accuracy and efficiency, reducing the labor intensity of workers, and minimizing the risk of human error and component damage during assembly, thus possessing good industrial practical value. At the same time, this assembly fixture can also be used for the disassembly of the differential assembly, further expanding its application scope.

[0074] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of this application. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of this application. All such changes and modifications are intended to be included within the scope of this application as claimed in the appended claims.

[0075] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this application may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0076] Similarly, it should be understood that, in order to streamline this application and aid in understanding one or more of the various aspects of the invention, features of this application may sometimes be grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of this application. However, this approach should not be construed as reflecting an intention that the claimed application requires more features than are expressly recited in each claim. Rather, as reflected in the corresponding claims, its novelty lies in the fact that the corresponding technical problem can be solved with fewer features than all of those in a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of this application.

[0077] Those skilled in the art will understand that, apart from the mutual exclusion of features, all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or elements of any method or apparatus so disclosed can be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature serving the same, equivalent, or similar purpose.

Claims

1. An electric drive axle transmission differential assembly tooling fixture, characterized by, The assembly into box system and the positioning support system are included; The assembly into box system includes a hoisting bottom plate, a clamping jaw mechanism and a first positioning matching mechanism, the clamping jaw mechanism and the first positioning matching mechanism are arranged at the bottom of the hoisting bottom plate, and the clamping jaw mechanism is used for clamping and releasing the differential assembly; The positioning support system includes a box positioning plate, a box positioning assembly arranged at the top of the box positioning plate and a second positioning matching mechanism, the box positioning assembly is used for matching and fixing with the gearbox box, the second positioning matching mechanism and the first positioning matching mechanism are matched with each other, and are used for realizing coaxial positioning of the differential assembly and the gearbox box.

2. The electric drive axle transmission differential assembly tooling of claim 1, wherein, The differential positioning shaft is arranged at the bottom of the clamping jaw mechanism, and the position of the differential positioning shaft corresponds to the differential assembly rear shell hole; the assembly into box system further includes a pre-positioning pin, the pre-positioning pin is arranged at one side of the clamping jaw mechanism, and the position of the pre-positioning pin corresponds to the fork shaft hole of the differential assembly, and is used for completing double-point positioning of the differential assembly together with the differential positioning shaft.

3. The electric drive axle transmission differential assembly tooling of claim 1, wherein, The first positioning matching mechanism includes a pair of first positioning blocks and a pair of first fixing columns, a pair of the first positioning blocks are arranged at two opposite corners of the hoisting bottom plate and extend downward, and a pair of the first fixing columns are arranged at other two opposite corners of the hoisting bottom plate and also extend downward. The second positioning matching mechanism includes a pair of second positioning columns and a pair of second fixing columns, a pair of the second positioning columns are arranged at two opposite corners of the box positioning plate and extend upward, are matched with and connected to a pair of the first positioning blocks, and a pair of the second fixing columns are arranged at other two opposite corners of the box positioning plate and also extend upward, are matched with and connected to a pair of the first fixing columns.

4. The electrical drive axle transmission differential assembly tooling of claim 3, wherein, The first positioning block and the second positioning column are configured in a plug-in structure, and the first fixing column and the second fixing column are configured in a plug-in structure.

5. The electric drive axle transmission differential assembly tooling of claim 1, wherein, The box positioning assembly includes a profiled positioning column and a box positioning block, the profiled positioning column extends upward and matches the side profile of the gearbox box, and the box positioning block is arranged at the top surface of the box positioning plate and matches the bottom profile of the gearbox box.

6. The electrical drive axle transmission differential assembly tooling of claim 2, wherein, The clamping jaw mechanism includes a guide rail bottom plate, a cylinder device and a differential clamping jaw. The guide rail bottom plate is fixed to the bottom of the hoisting bottom plate through a positioning connecting shaft, and the differential positioning shaft is arranged on the guide rail bottom plate. The cylinder device is fixed to the guide rail bottom plate and is used for providing a power source for clamping and releasing. The differential clamping jaw is driven to open and close by the cylinder device, so as to complete clamping and releasing of the differential assembly.

7. The electric drive axle transmission differential assembly tooling of claim 6, wherein, The clamping jaw mechanism further includes a guide rail, a sliding block, a lifting fixing plate, a lifting side plate, a clamping jaw connecting plate and a clamping jaw fixing plate. The lifting fixing plate is connected with the cylinder device and is used for receiving the driving force of the cylinder device, the lifting side plate is fixed to the lifting fixing plate, the clamping jaw connecting plate and the clamping jaw fixing plate are connected with the lifting side plate through a fixing shaft and are integrated, the guide rail is fixed to the guide rail bottom plate, and the sliding block is fixed to the clamping jaw fixing plate and is in sliding connection with the guide rail. The differential claw is fixed on the claw fixing plate, when the cylinder device drives the lifting fixing plate and the lifting side plate to lift, the differential claw realizes the clamping or releasing of the differential assembly through the sliding between the guide rail and the sliding block.

8. The electric drive axle transmission differential assembly tooling of claim 6, wherein, The cylinder device includes a cylinder body, a cylinder lifting mechanism and a cylinder inlet and outlet quick plug, the cylinder inlet and outlet quick plug is used for the air intake and exhaust of the cylinder body, and realizes the lifting action of the cylinder lifting mechanism.

9. The electric drive axle transmission differential assembly tooling of claim 1, wherein, The assembly into box system further includes a pneumatic switch, a first lifting ring and a first handle. The pneumatic switch is arranged on the lifting bottom plate and is used for controlling the clamping and releasing of the claw mechanism; the first lifting ring is fixed on the top of the lifting bottom plate and is used for completing the lifting of the differential assembly in cooperation with the lifting equipment; and the first handle is fixed on the lifting bottom plate through a handle mounting block and is used for the movement of the assembly into box system.

10. The electric drive axle transmission differential assembly tooling of claim 1, wherein, The positioning support system further includes a second lifting ring and a second handle, the second lifting ring is fixed on the box positioning plate and is used for realizing the transfer of the positioning support system through the lifting equipment; and the second handle is fixed on the box positioning plate through a handle mounting block and is used for the short distance movement of the positioning support system.

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