Differential shell turning clamp assembly

Abstract

The utility model relates to the technical field of automobile part manufacturing, and particularly discloses a differential shell turning clamp assembly. The differential shell turning clamp assembly comprises a connecting base, a first clamping assembly and a second clamping assembly. A first inner cavity and a second inner cavity which are communicated up and down are formed in the connecting seat; a plurality of positioning protrusions used for positioning and supporting a differential shell flange plate are arranged on the upper end face of the first inner cavity in the annular direction. The first clamping assembly is connected with the connecting base and can clamp and fix the differential shell part located in the first inner cavity in a centering mode. The second clamping assembly is located at the lower end of the connecting base and can conduct centering clamping on the lower end of the differential shell located in the second inner cavity. According to the differential shell turning clamp assembly, centering clamping of the differential shell can be achieved, and the machining precision of the differential shell is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, and in particular to a differential shell machining fixture assembly. Background Technology

[0002] The machining process of the differential housing involves placing the heat-treated differential housing blank onto a CNC machine tool for fixing, so that the long end of the differential housing (i.e. the end of the differential housing with the flange) can be rough-machined.

[0003] Patent CN221088140U discloses a differential housing centering fixture. It utilizes an airtight support assembly to position and support the differential housing, employs two opposing positioning jaws to clamp the center of the differential housing, and uses a rotary hydraulic cylinder to rotate and press down to fix the differential housing. Finally, an airtightness test is performed using the airtight support assembly; only after passing the test does the machining center begin processing the differential housing. Therefore, this differential housing centering fixture improves machining accuracy by employing a method of centering and clamping before airtightness testing.

[0004] However, due to improvements in the differential housing structure, it is currently impossible to clamp the middle part of the differential housing; in addition, due to the uneven surface of the differential housing blank, it is unreliable to judge the clamping condition of the differential housing through airtightness testing. Summary of the Invention

[0005] The purpose of this invention is to provide a machining fixture assembly for differential shells, which can achieve centering and clamping of differential shells and improve the machining accuracy of differential shells.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A differential shell machining fixture assembly includes a connecting seat, a first clamping assembly, and a second clamping assembly; the connecting seat is provided with a first inner cavity and a second inner cavity that are connected vertically; the upper end face of the first inner cavity is provided with a plurality of positioning protrusions along the circumferential direction for positioning and supporting the differential shell flange;

[0008] The first clamping assembly is connected to the connecting seat and is capable of centering and clamping the differential shell portion located in the first inner cavity;

[0009] The second clamping assembly is located at the lower end of the connecting seat and is capable of centering and clamping the lower end of the housing located in the second inner cavity.

[0010] Furthermore, the first clamping assembly includes two sets of limiting and pressing rods arranged opposite to each other. The limiting and pressing rods are screwed to the connecting seat, and one end of the limiting and pressing rod is located in the first inner cavity and abuts against the end face of the cross shaft through hole of the housing.

[0011] Furthermore, the limiting pressure rod has a limiting portion located outside the connecting seat; the outside of the connecting seat is provided with a limiting plane for limiting the limiting portion.

[0012] Furthermore, the second clamping assembly includes a set of claws spaced circumferentially, each claw being capable of moving together in a horizontal direction toward or away from the clamping center; the clamping center is located on the central axis of the second inner cavity; and the lower side of the connecting seat is provided with a clearance groove for avoiding each claw.

[0013] Furthermore, one end of the claw is located inside the second inner cavity and is provided with an arc-shaped positioning part. The positioning surface of the arc-shaped positioning part is provided with a set of mounting grooves, and an anti-slip pressure block is provided in the mounting grooves.

[0014] Furthermore, a limiting groove is provided on the inner side of the second inner cavity for limiting the arc-shaped positioning part.

[0015] Furthermore, a lifting member is slidably disposed inside the positioning protrusion, and the upper end of each lifting member can extend upward synchronously out of the corresponding positioning protrusion.

[0016] Furthermore, the connecting seat includes an upper support and a lower support connected vertically, with the first inner cavity formed in the upper support and the second inner cavity formed in the lower support.

[0017] The beneficial effects of this utility model are as follows: The differential shell machining fixture assembly of this utility model uses various positioning protrusions to position and support the differential shell flange, uses a first clamping assembly to center and clamp the differential shell portion located in the first inner cavity, and uses a second clamping assembly to center and clamp the lower end of the differential shell located in the second inner cavity, thereby realizing the centering and clamping of the differential shell with high clamping accuracy, which is beneficial to improving the machining accuracy of the differential shell. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of a differential shell machining fixture assembly provided by this utility model.

[0019] Figure 2 This is a top view of a differential machining fixture assembly provided by this utility model.

[0020] Figure 3 This is a structural schematic diagram of the connecting seat and the first clamping assembly.

[0021] Figure 4 This is a schematic diagram of the second clamping component. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1 to 4 As shown, a differential shell machining fixture assembly includes a connecting seat 1, a first clamping assembly 3, and a second clamping assembly 4. The connecting seat 1 has a first inner cavity 21 and a second inner cavity 22 that are vertically connected. The upper surface of the first inner cavity 21 has several positioning protrusions 5 arranged circumferentially for positioning and supporting the differential shell flange 110. The first clamping assembly 3 is connected to the connecting seat 1 and is used to center and clamp the differential shell portion located within the first inner cavity 21. The second clamping assembly 4 is located at the lower end of the connecting seat 1 and is used to center and clamp the lower end of the differential shell 100 located within the second inner cavity 22.

[0024] Specifically, in this embodiment, as Figures 1 to 3 As shown, the connecting seat 1 includes an upper support 11 and a lower support 12 connected vertically. A first inner cavity 21 is formed in the upper support 11, and a second inner cavity 22 is formed in the lower support 12. The upper support 11 and the lower support 12 are positioned by a set of locating pins 7 and locked together by a set of locking screws.

[0025] The positioning protrusion 5 is equipped with a lifting member 6 that slides vertically within it, and the upper end of each lifting member 6 can extend upwards synchronously from the corresponding positioning protrusion 5. Preferably, the upper support 11 is embedded with a cylinder for driving the lifting member 6 to extend out of the top surface of the positioning protrusion 5. After processing, the corresponding lifting member is driven upwards by each cylinder, thereby lifting the housing 100 upwards for easy removal.

[0026] In this embodiment, as Figure 2 and 4 As shown, the first clamping assembly 3 includes two sets of limiting and pressing rods 31 arranged opposite to each other. The limiting and pressing rods 31 are screwed to the connecting seat 1, and one end of the limiting and pressing rod 31 is located in the first inner cavity 21 and abuts against the end face of the cross shaft through hole of the housing 100.

[0027] Furthermore, the limiting pressure rod 31 has a limiting part 32 located outside the connecting seat 1; a limiting plane 111 for limiting the limiting part 32 is provided on the outside of the connecting seat 1.

[0028] In this embodiment, as Figure 1 , 2 As shown in Figure 4, the second clamping assembly 4 includes a set of jaws 41 spaced circumferentially, each jaw 41 capable of moving together horizontally toward or away from the clamping center; the clamping center is located on the central axis of the second inner cavity 22. Preferably, three jaws 41 are provided, each connected to one of the three moving ends of the chuck. A clearance groove 121 is provided on the lower side of the connecting seat 1 to allow clearance from each jaw 41.

[0029] Furthermore, one end of the claw 41 is located inside the second inner cavity 22 and is provided with an arc-shaped positioning part 42. The positioning surface of the arc-shaped positioning part 42 is provided with a set of mounting grooves, and an anti-slip pressure block 43 is provided in the mounting grooves. The inner side of the second inner cavity 22 is provided with a limiting groove 221 for limiting the arc-shaped positioning part 42 to prevent the arc-shaped positioning part 42 from exiting the second inner cavity 22.

[0030] This utility model discloses a machining fixture assembly for a differential shell. In use, the differential shell 100 to be machined is placed on the connecting seat 1, and the differential shell flange 110 is positioned and supported by the positioning protrusions 5. The first clamping assembly 3 is used to center and clamp the differential shell portion located in the first inner cavity 21, and the second clamping assembly 4 is used to center and clamp the lower end of the differential shell 100 located in the second inner cavity 22. This achieves centering and clamping of the differential shell 100 with high clamping accuracy, which is beneficial to improving the machining accuracy of the differential shell 100.

[0031] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A differential case machining fixture assembly comprising: It includes a connecting seat (1), a first clamping assembly (3) and a second clamping assembly (4); the connecting seat (1) is provided with a first inner cavity (21) and a second inner cavity (22) that are connected vertically; the upper end face of the first inner cavity (21) is provided with a plurality of positioning protrusions (5) for positioning and supporting the differential shell flange along the circumferential direction. The first clamping assembly (3) is connected to the connecting seat (1) and can center and clamp the shell portion located in the first inner cavity (21); The second clamping assembly (4) is located at the lower end of the connecting seat (1) and is capable of centering and clamping the lower end of the housing located in the second inner cavity (22).

2. A differential case machining fixture assembly as set forth in claim 1, wherein, The first clamping assembly (3) includes two sets of limiting pressure rods (31) arranged opposite to each other. The limiting pressure rods (31) are screwed to the connecting seat (1), and one end of the limiting pressure rods (31) is located in the first inner cavity (21) and abuts against the cross shaft through hole end face of the housing.

3. A differential case machining fixture assembly as set forth in claim 2, wherein, The limiting pressure rod (31) has a limiting part (32) located outside the connecting seat (1); the connecting seat (1) is provided with a limiting plane (111) for limiting the limiting part (32).

4. A differential case machining fixture assembly as set forth in claim 1, wherein, The second clamping assembly (4) includes a set of claws (41) spaced apart in the circumferential direction. Each of the claws (41) can move together in the horizontal direction toward or away from the clamping center. The clamping center is located on the central axis of the second inner cavity (22). The lower side of the connecting seat (1) is provided with a relief groove (121) for avoiding each of the claws (41).

5. A differential case machining fixture assembly as set forth in claim 4, wherein, One end of the claw (41) is located in the second inner cavity (22) and is provided with an arc-shaped positioning part (42). The positioning surface of the arc-shaped positioning part (42) is provided with a set of mounting grooves, and an anti-slip pressure block (43) is provided in the mounting groove.

6. A differential machining fixture assembly according to claim 5, characterized in that, The inner side of the second inner cavity (22) is provided with a limiting groove (221) for limiting the arc-shaped positioning part (42).

7. A differential case machining fixture assembly as described in claim 1 wherein, The positioning protrusion (5) is provided with a lifting member (6) that slides up and down, and the upper end of each lifting member (6) can extend upwards synchronously from the corresponding positioning protrusion (5).

8. A differential case machining fixture assembly as described in claim 1 wherein, The connecting seat (1) includes an upper support (11) and a lower support (12) connected vertically. The first inner cavity (21) is opened in the upper support (11), and the second inner cavity (22) is opened in the lower support (12).

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