A quick-change clamping tool for machining differential housings

Abstract

This utility model provides a quick-change clamping fixture for differential housings, comprising: a worktable, a large base plate on top of the worktable, four-axis shims and shims respectively on the top of the large base plate, a tailstock fixedly connected to the top of the shims by bolts, four axes fixedly connected to the top of the four-axis shims by bolts, rotating seats rotatably connected to the surfaces of the four axes and the tailstock, L-plates fixedly connected to the surfaces of the rotating seats, a bridge plate between the two L-plates, a base symmetrically arranged on the top of the bridge plate, a cylinder seat mounted on the surface of each of the two bases, a cylinder fixedly connected to the cylinder seat, and a pressure plate at the telescopic end of the cylinder. When it is necessary to replace different models of differential housings, only the connecting bolts between the base and the bridge plate need to be removed, the base of the appropriate model needs to be replaced, and the positioning plate and positioning pin on the positioning pin seat need to be replaced simultaneously, which greatly reduces downtime for maintenance and significantly improves the changeover efficiency of the production line.

Description

Technical Field

[0001] This utility model relates to the field of differential housing processing technology, specifically to a quick-change clamping tooling for differential housing processing. Background Technology

[0002] As a core component of the automotive transmission system, the differential's housing machining precision directly determines its transmission efficiency and service life. The differential housing has a complex structure, typically requiring the machining of key features such as bearing holes, flange faces, and positioning holes. Furthermore, the dimensions and structures of differential housings vary significantly between different vehicle models, placing extremely high demands on the versatility, clamping efficiency, and positioning accuracy of machining tooling.

[0003] For products manufactured on the same production line, frequent disassembly and installation of fixtures are required to meet the processing needs of different products. The tooling and fixtures used in machining centers and drilling and tapping machines are expensive, cumbersome and difficult to disassemble, and heavy. Lifting vehicles are needed for disassembly, which consumes labor, causes long production line downtime, affects output, and poses safety hazards. Utility Model Content

[0004] The present invention aims to solve the problems mentioned in the background art by providing a quick-change clamping tooling for differential housing.

[0005] The specific technical solution is as follows:

[0006] A quick-change clamping fixture for differential housing includes: a worktable, a large base plate on the top of the worktable, a four-axis shim block and a shim block respectively on the top of the large base plate, a tailstock fixedly connected to the top of the shim block by bolts, a four-axis fixedly connected to the top of the four-axis shim block by bolts, a rotating seat rotatably connected to the surface of the four-axis and the tailstock respectively, an L-plate fixedly connected to the surface of each rotating seat, a bridge plate between the two L-plates, a base symmetrically arranged on the top of the bridge plate, a cylinder seat mounted on the surface of each of the two bases, a cylinder fixedly connected to the cylinder seat, and a pressure plate provided at the telescopic end of the cylinder.

[0007] The aforementioned quick-change clamping fixture for differential housing includes: a positioning pin seat fixedly connected to the top of the base; a positioning plate mounted on the positioning pin seat; a limit hole formed on the positioning plate; and a positioning pin inserted into the positioning plate.

[0008] The aforementioned quick-change clamping fixture for differential housing includes an oil distributor fixedly connected to one side of the worktable, which is connected to the oil cylinder via a pipeline.

[0009] The aforementioned quick-change clamping fixture for differential housing includes a pressure plate connected to the extension / retraction end of the hydraulic cylinder via bolts.

[0010] The aforementioned quick-change clamping fixture for differential housing includes a through hole for placing the differential housing on the top of both the base and the bridge plate.

[0011] The aforementioned quick-change clamping fixture for differential housing includes a rubber anti-slip pad attached to the bottom of the pressure plate, and the surface of the anti-slip pad has diamond-shaped anti-slip patterns.

[0012] The aforementioned quick-change clamping tooling for differential housing includes replaceable wear-resistant bushings embedded in the inner walls of the through holes of the base and bridge plate, wherein the bushings are made of high-hardness alloy.

[0013] This utility model has the following beneficial effects:

[0014] The system features a multi-cylinder synchronous drive design, which, in conjunction with the oil distributor on one side of the worktable, achieves unified oil supply and pressure regulation, eliminating the need for manual tightening of bolts one by one. The cylinders are fixed to the base surface via cylinder seats, and the oil distributor connects to each cylinder through pipes, allowing precise control of the synchronous extension and retraction of all cylinders. This ensures uniform clamping force transmission while significantly reducing clamping operation time. Simultaneously, the bridge plate and L-plate are quickly positioned and installed using positioning keys. These keys directly embed into the mating grooves of the L-plate and bridge plate, eliminating the need for repeated manual alignment and eliminating the tedious alignment steps of traditional tooling that rely on measuring tapes and adjusting shims, further improving clamping efficiency. When changing to a different model of differential housing, only the connecting bolts between the base and bridge plate need to be removed, the base of the appropriate model replaced, and the positioning plate and positioning pin on the positioning pin seat replaced simultaneously, significantly reducing downtime for maintenance and greatly improving production line changeover efficiency. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of the quick-change clamping tooling for the differential housing provided in this embodiment of the utility model;

[0016] Figure 2 A schematic diagram of the bridge plate installation of the differential housing quick-change clamping machining tooling provided in this embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the bottom structure of the bridge plate in the quick-change clamping tooling for differential housing provided in an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the base in the quick-change clamping tooling for differential housing provided in an embodiment of this utility model.

[0019] In the attached image:

[0020] 1. Workbench; 2. Base plate; 3. Oil distributor; 4. Four-axis shim block; 5. Four-axis; 6. Shim block; 7. Tailstock; 8. L-plate; 9. Bridge plate; 10. Base; 11. Cylinder seat; 12. Cylinder; 13. Positioning key; 14. Pressure plate; 15. Copper head; 17. Positioning plate; 18. Positioning pin seat; 19. Positioning pin. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0023] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example

[0026] This embodiment provides a quick-change clamping tooling for machining differential housings, such as... Figures 1-4As shown, it includes: a workbench 1, a large base plate 2 on the top of the workbench 1, a four-axis shim block 4 and a shim block 6 on the top of the large base plate 2, a tailstock 7 fixedly connected to the top of the shim block 6 by bolts, a four-axis 5 fixedly connected to the top of the four-axis shim block 4 by bolts, a rotating seat rotatably connected to the surface of the four-axis 5 and the tailstock 7, an L-plate 8 fixedly connected to the surface of each rotating seat, a bridge plate 9 between the two L-plates 8, a base 10 symmetrically arranged on the top of the bridge plate 9, a cylinder seat 11 mounted on the surface of each of the two bases 10, a cylinder 12 fixedly connected to the cylinder seat 11, and a pressure plate 14 at the telescopic end of the cylinder 12.

[0027] A quick-change clamping tooling for differential housing using the above technical solution is designed with multiple hydraulic cylinders 12 in synchronous drive mode. It works in conjunction with the oil distributor 3 on one side of the worktable 1 to achieve unified oil supply and pressure regulation, eliminating the need for manual tightening of bolts one by one. The hydraulic cylinders 12 are fixed to the surface of the base 10 via hydraulic cylinder seats 11. The oil distributor 3 is connected to each hydraulic cylinder 12 via pipes, which can precisely control the synchronization of the extension and retraction of all hydraulic cylinders 12, ensuring uniform transmission of clamping force while significantly shortening the clamping operation time. Meanwhile, the bridge plate 9 and the L plate 8 are quickly positioned and installed using the positioning key 13. The positioning key 13 can be directly embedded into the mating groove of the L plate 8 and the bridge plate 9, eliminating the need for repeated manual calibration and alignment. This saves the tedious alignment steps of traditional tooling that rely on measuring tape and adjusting shims, further improving clamping efficiency. When it is necessary to replace different models of differential housings, it is only necessary to remove the connecting bolts between the base 10 and the bridge plate 9, replace the base 10 with the appropriate model, and simultaneously replace the positioning plate 17 and positioning pin 19 on the positioning pin seat 18, which greatly reduces downtime maintenance time and significantly improves production line changeover efficiency.

[0028] To achieve precise positioning of the differential housing and prevent housing displacement during machining, a positioning pin seat 18 is fixedly connected to the top of the base 10. A positioning plate 17 is mounted on the positioning pin seat 18, and a limit hole is formed on the positioning plate 17. A positioning pin 19 is inserted into the positioning plate 17. Through the precise engagement of the positioning pin 19 with the positioning hole on the differential housing, combined with the limiting function of the positioning plate 17, the housing can be stably constrained in the preset machining position, ensuring machining accuracy.

[0029] To ensure the stability of the connection between the pressure plate 14 and the telescopic end of the hydraulic cylinder 12, and to facilitate subsequent disassembly and maintenance, the pressure plate 14 and the telescopic end of the hydraulic cylinder 12 are connected by bolts. This bolted connection not only withstands the clamping force generated when the hydraulic cylinder 12 is driven, preventing the pressure plate 14 from falling off during processing, but also allows for quick disassembly and replacement when the pressure plate 14 wears out or needs to be adapted to different housings. Furthermore, the angle of the pressure plate 14 can be changed to accommodate different models of reducer housings.

[0030] To achieve centralized control of multiple hydraulic cylinders 12 and ensure consistent oil supply pressure for each cylinder, a distributor 3 is fixedly connected to one side of the workbench 1. The distributor 3 is connected to the cylinders 12 via pipelines. The distributor 3 can evenly distribute the oil from the external hydraulic system to each cylinder 12, and can also adjust the oil supply pressure in real time to ensure that the clamping force of all cylinders 12 is the same, thus avoiding deformation or loosening of the housing due to uneven clamping force.

[0031] To effectively support and limit the bottom of the differential housing and prevent it from wobbling during clamping, both the base 10 and the top of the bridge plate 9 have through holes for placing the differential housing. The size and shape of the through holes are designed according to the raised structure at the bottom of the differential housing, allowing the bottom of the housing to be precisely inserted into the through holes, forming a bottom support.

[0032] To increase the friction between the pressure plate 14 and the differential housing, and to prevent damage to the housing surface during clamping, a rubber anti-slip pad is attached to the bottom of the pressure plate 14, and the surface of the anti-slip pad has diamond-shaped anti-slip patterns. The rubber material has a certain degree of elasticity, which can buffer the clamping impact of the pressure plate 14 and prevent indentations on the housing surface, while the diamond-shaped anti-slip patterns can significantly improve the friction.

[0033] To extend the service life of the through holes in the base 10 and bridge plate 9, replaceable wear-resistant bushings are embedded in the inner walls of the through holes in the base 10 and bridge plate 9. The bushings are made of high-hardness alloy. The high-hardness alloy material has strong wear resistance, which can reduce the direct friction loss between the housing and the inner wall of the through hole. When the bushing wears to a certain extent, there is no need to replace the base 10 or bridge plate 9; only the bushing needs to be replaced, which greatly reduces maintenance costs and tooling replacement cycle.

[0034] In summary, the quick-change clamping tooling for differential housing provided in this embodiment has the following advantages: it features a multi-cylinder 12 synchronous drive design, which, together with the oil distributor 3 on one side of the worktable 1, achieves unified oil supply and pressure regulation, eliminating the need for manual tightening of bolts one by one; wherein, the oil cylinder 12 is fixed to the surface of the base 10 through the oil cylinder seat 11, and the oil distributor 3 is connected to each oil cylinder 12 through pipes, which can precisely control the extension and retraction synchronization of all oil cylinders 12, ensuring uniform transmission of clamping force while significantly shortening the clamping operation time. Meanwhile, the bridge plate 9 and the L plate 8 are quickly positioned and installed using the positioning key 13. The positioning key 13 can be directly embedded into the mating groove of the L plate 8 and the bridge plate 9, eliminating the need for repeated manual calibration and alignment. This saves the tedious alignment steps of traditional tooling that rely on measuring tape and adjusting shims, further improving clamping efficiency. When it is necessary to replace different models of differential housings, it is only necessary to remove the connecting bolts between the base 10 and the bridge plate 9, replace the base 10 with the appropriate model, and simultaneously replace the positioning plate 17 and positioning pin 19 on the positioning pin seat 18, which greatly reduces downtime maintenance time and significantly improves production line changeover efficiency.

[0035] During use, confirm that the base 10, positioning plate 17, and positioning pin 19 have been replaced with compatible specifications according to the model of the differential housing to be processed. Align the protruding structure at the bottom of the differential housing with the through holes at the top of the base 10 and bridge plate 9, and slowly insert it so that the bottom of the housing is embedded in the through hole, completing the initial support and limiting. Insert the positioning pin 19 into the aligned limiting hole and the positioning hole of the housing. The rigid constraint of the positioning pin 19 restricts the horizontal movement of the housing. Then check whether the connecting bolts of the positioning pin seat 18 and the positioning plate 17 are tight to prevent the positioning components from loosening during processing, which would lead to a decrease in positioning accuracy. Operate the control switch of the oil distributor 3 to start the synchronous drive of the multi-cylinder 12. The extension end of the oil cylinder 12 drives the pressure plate 14 to move downward. After ensuring that the clamping force is stable, turn off the drive switch. The pressure plate 14 is in close contact with the housing through the friction of the rubber anti-slip pad, and with the support of the bottom through hole, it prevents the housing from vibrating or shifting during processing. During production line changeover, it is only necessary to disassemble the fixture positioning plate 17, pressure plate 14, copper head 15, and positioning pin seat 18, and change the fixture program to produce other products, thus achieving co-line production.

[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-change clamping tooling for machining differential housings, characterized in that, include: A workbench (1) is provided with a large base plate (2) on top of the workbench (1). A four-axis shim block (4) and a shim block (6) are respectively provided on the top of the large base plate (2). A tail seat (7) is fixedly connected to the top of the shim block (6) by bolts. A four-axis (5) is fixedly connected to the top of the four-axis shim block (4) by bolts. Rotary seats are rotatably connected to the surfaces of the four-axis (5) and the tail seat (7). An L plate (8) is fixedly connected to the surface of each of the rotating seats. A bridge plate (9) is provided between the two L plates (8). A base (10) is symmetrically provided on the top of the bridge plate (9). A cylinder seat (11) is installed on the surface of each of the two bases (10). A cylinder (12) is fixedly connected to the cylinder seat (11). A pressure plate (14) is provided at the telescopic end of the cylinder (12).

2. The quick-change clamping tooling for differential housing according to claim 1, characterized in that, The base (10) is fixedly connected to the top of the positioning pin seat (18), the positioning pin seat (18) is equipped with a positioning plate (17), the positioning plate (17) has a limit hole, and the positioning pin (19) is inserted into the positioning plate (17).

3. The quick-change clamping tooling for differential housing according to claim 1, characterized in that, An oil separator (3) is fixedly connected to one side of the workbench (1), and the oil separator (3) is connected to the oil cylinder (12) through a pipeline.

4. The quick-change clamping tooling for differential housing according to claim 3, characterized in that, The pressure plate (14) is connected to the extension end of the oil cylinder (12) by bolts.

5. The quick-change clamping tooling for differential housing according to claim 1, characterized in that, Both the base (10) and the bridge plate (9) have through holes on their tops for placing the differential housing.

6. The quick-change clamping tooling for differential housing according to claim 1, characterized in that, The bottom of the pressure plate (14) is covered with a rubber anti-slip pad, and the surface of the anti-slip pad is provided with a diamond-shaped anti-slip pattern.

7. The quick-change clamping tooling for differential housing according to any one of claims 1-6, characterized in that, The inner walls of the through holes of the base (10) and the bridge plate (9) are fitted with replaceable wear-resistant bushings, which are made of high-hardness alloy bushings.

Images