Differential shell threaded hole machining clamp

Abstract

The utility model discloses a differential shell machining threaded hole clamp which comprises a working table, a clamping assembly is installed on the top of the working table, a through hole is formed in the middle of the working table, the clamping assembly comprises a positioning mandrel fixedly installed in the through hole of the working table, and a locking base is fixedly connected to the outer wall of the bottom of the positioning mandrel. A screw rod is slidably inserted into the positioning mandrel, the screw rod can be in threaded connection with the interior of the locking seat, the circumferential outer wall of the positioning mandrel and the circumferential outer wall of the screw rod are each slidably sleeved with a butt joint ring, the two butt joint rings are arranged in a step shape, and three supporting assemblies are installed on the outer wall of the top of the workbench. The three supporting assemblies are distributed on the outer portion of the positioning mandrel in a surrounding mode, the clamping assemblies are arranged, a clamp is used for positioning through a middle hole, the positioning mandrel and the butt joint ring have the positioning function and the mistake proofing function, clamping consistency is better, and product machining precision can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of differential shell production, in particular to a fixture for machining threaded holes in differential shells. Background Art

[0002] A fixture is a process device used to quickly secure workpieces during machining, ensuring the correct relative positioning of the machine tool, cutting tool, and workpiece. It is an indispensable component in machining, significantly impacting workpiece accuracy, quality, and production efficiency. As a crucial component of mechanical components, the threaded holes on the differential housing require high-precision and efficient machining. This demands that the fixture meet high standards in terms of positioning, clamping, and stability.

[0003] After searching, a utility model with Chinese patent publication number CN217344552U discloses a differential case cover processing fixture, which relates to the field of differential case cover processing technology, including a fixed block 1, the bottom end of which is fixedly connected to a base 4, and one end of the fixed block 1 is provided with a clamping mechanism 2 that penetrates into the interior of the fixed block 1.

[0004] At present, the positioning method of the fixture is generally based on the outer circle of the two ends. However, there will inevitably be some deviations in the manufacturing size of the outer circle of the differential shell, which will cause deviations in the clamping consistency, and the finished product is likely to affect the dimensional results. Utility Model Content

[0005] The purpose of the utility model is to provide a fixture for machining threaded holes in differential shells to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixture for processing threaded holes in a differential shell, comprising a workbench, a clamping assembly installed on the top of the workbench, a through hole opened in the middle of the workbench, the clamping assembly comprising a positioning core shaft fixedly installed inside the through hole of the workbench, a locking seat fixedly connected to the bottom outer wall of the positioning core shaft, a screw slidably inserted into the interior of the positioning core shaft, the screw can be threadedly connected to the interior of the locking seat, a docking ring is slidably sleeved on the outer wall of the circumference of the positioning core shaft and the two docking rings are both arranged in a stepped shape.

[0007] The fixture is positioned with the middle hole. The positioning core shaft and the docking ring not only have a positioning function, but also an error-proof function. The clamping consistency is better, which is beneficial to improving the product processing accuracy. For example, the inner diameter of the middle hole of the differential shell is consistent with the outer diameter of the positioning core shaft, and the positioning can be achieved directly. If the inner diameter of the middle hole is larger than the outer diameter of the positioning core shaft, as long as the docking ring is first set on the outside of the positioning core shaft, and then the middle piece hole of the differential shell is set on the outside of a corresponding step, the positioning of the differential shell can also be achieved, which is beneficial to improve the adaptability of the fixture. Then insert the screw into the positioning core shaft, and then it contacts the locking seat, and then turn the screw to screw it into the locking seat. The screw will drive a docking ring set on the outside of it to squeeze on the top of the differential shell, which can not only limit the state of the differential shell, but also fix the differential shell to prevent it from deflecting at will.

[0008] As a further preferred embodiment of the present technical solution, three support assemblies are installed on the outer wall of the top of the workbench, and the three support assemblies are distributed around the outside of the positioning core shaft.

[0009] As a further preferred embodiment of the present technical solution, the support assembly includes a mounting seat fixedly connected to the top outer wall of the workbench, a screw rod is rotatably connected to the top outer wall of the mounting seat, a support column is provided on the external threaded sleeve of the screw rod, and two limit rods are slidably plugged into the mounting seat and the inside of the workbench, and one end of the two limit rods is fixedly connected to the support column.

[0010] Adjust the position of the support column so that its top end is in contact with the bottom wall of the differential shell, and drive the screw rod to rotate through the knob. The support column that is restricted from rotating by the limit rod will be driven by the screw rod to move in the vertical direction, which is beneficial to increase the adaptability of the device. With the support of multiple support columns, the stability of the differential shell is greatly improved, so that the differential shell will not be skewed at will during processing.

[0011] As a further preferred embodiment of the present technical solution, a movable seat is slidably inserted inside the workbench, a hydraulic cylinder is fixedly installed on the inner wall of the top of the workbench, and the output end of the hydraulic cylinder is fixedly connected to one end of the bottom of the movable seat, and a limiting rod is slidably inserted inside the movable seat, and the limiting rod is arranged opposite to the positioning core shaft.

[0012] As a further preferred embodiment of the present technical solution, a support block is detachably installed on the outer walls of both ends of the movable seat, and a differential shell is provided on the outer sliding sleeve of the positioning core shaft, and the two support blocks can just hold up the differential shell.

[0013] As a further preferred embodiment of the present technical solution, a plurality of connection holes are provided on both sides of the bottom of the workbench.

[0014] As a further preferred embodiment of the present technical solution, each of the three support columns is provided with an avoidance groove on its circumference, and the three avoidance grooves are arranged close to each other.

[0015] The utility model provides a fixture for machining threaded holes in differential shells, which has the following beneficial effects:

[0016] (1) The present invention sets a clamping component, and the fixture is positioned with the middle hole. The positioning core shaft and the docking ring not only have a positioning function, but also an error-proofing function. The clamping consistency is better, which is beneficial to improving the processing accuracy of the product. If the inner diameter of the middle hole of the differential shell is consistent with the outer diameter of the positioning core shaft, the positioning can be directly achieved. If the inner diameter of the middle hole is larger than the outer diameter of the positioning core shaft, the differential shell can be positioned by first setting the docking ring on the outside of the positioning core shaft, and then setting the middle hole of the differential shell on the outside of a corresponding step, which is beneficial to improving the adaptability of the fixture. Then, the screw is inserted into the interior of the positioning core shaft, and then it contacts the locking seat. Then, the screw is rotated to screw it into the locking seat. The screw will drive a docking ring set on the outside of it to squeeze on the top of the differential shell, which can not only limit the state of the differential shell, but also fix the differential shell to prevent it from deflecting at will.

[0017] (2) The present invention adjusts the position of the support column by setting a support assembly so that the top end thereof is in contact with the bottom wall of the differential shell. The screw is driven to rotate by the knob. The support column that is restricted from rotating by the limit rod will be driven by the screw to move in the vertical direction, which is beneficial to increase the adaptability of the device. With the support of multiple support columns, the stability of the differential shell is greatly improved, so that the differential shell will not be skewed at will during processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model from a first perspective;

[0019] Figure 2 This is a schematic diagram of the overall structure of the utility model from a second perspective;

[0020] Figure 3 For the utility model Figure 1 A in the middle is an enlarged structural diagram;

[0021] Figure 4 For the utility model Figure 2 The enlarged structural diagram at B in the middle;

[0022] In the figure: 1. Workbench; 2. Moving seat; 3. Limiting rod; 4. Support block; 5. Connecting hole; 6. Clamping assembly; 7. Support assembly; 601. Positioning mandrel; 602. Locking seat; 603. Screw; 604. Docking ring; 701. Mounting seat; 702. Screw; 703. Support column; 704. Limiting rod; 705. Avoidance groove. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0024] The utility model provides a technical solution: Figure 2 and Figure 3 As shown, in this embodiment, the fixture for processing threaded holes in differential shells includes a workbench 1, a clamping assembly 6 is installed on the top of the workbench 1, a through hole is opened in the middle of the workbench 1, the clamping assembly 6 includes a positioning core shaft 601 fixedly installed inside the through hole of the workbench 1, a locking seat 602 is fixedly connected to the bottom outer wall of the positioning core shaft 601, a screw 603 is slidably inserted into the interior of the positioning core shaft 601, the screw 603 can be threadedly connected to the interior of the locking seat 602, and a docking ring 604 is slidably sleeved on the circumferential outer walls of the positioning core shaft 601 and the screw 603, and the two docking rings 604 are both stepped.

[0025] If the inner diameter of the middle hole of the differential shell is consistent with the outer diameter of the positioning core shaft 601, positioning can be achieved directly. If the inner diameter of the middle hole is larger than the outer diameter of the positioning core shaft 601, the differential shell can be positioned by first sleeved on the outside of the positioning core shaft 601 and then sleeved on the outside of a corresponding step, which is beneficial to improving the adaptability of the fixture. Then, the screw 603 is inserted into the interior of the positioning core shaft 601, and then it contacts the locking seat 602. Then, the screw 603 is rotated to screw it into the locking seat 602. The screw 603 will drive a docking ring 604 sleeved on its outside to squeeze on the top of the differential shell, which can not only limit the state of the differential shell, but also fix the differential shell to prevent it from deflecting at will.

[0026] like Figure 2 and Figure 4 As shown, three support assemblies 7 are installed on the top outer wall of the workbench 1 , and the three support assemblies 7 are distributed around the outside of the positioning core shaft 601 .

[0027] The support assembly 7 includes a mounting base 701 fixedly connected to the top outer wall of the workbench 1, a screw rod 702 is rotatably connected to the top outer wall of the mounting base 701, and a support column 703 is provided on the external thread sleeve of the screw rod 702. The mounting base 701 and the workbench 1 are slidably plugged into two limit rods 704, and one end of the two limit rods 704 is fixedly connected to the support column 703.

[0028] Adjust the position of the support column 703 so that its top end is in contact with the bottom wall of the differential shell, and drive the screw rod 702 to rotate by the knob. The support column 703, which is restricted from rotating by the limit rod 704, will be driven by the screw rod 702 to move in the vertical direction, which is beneficial to increase the adaptability of the device. With the support of multiple support columns 703, the stability of the differential shell is greatly improved, so that the differential shell will not be skewed at will during processing.

[0029] like Figure 1 As shown in Figure 2, a movable seat 2 is slidably inserted inside the workbench 1, a hydraulic cylinder is fixedly installed on the inner wall of the top of the workbench 1, and the output end of the hydraulic cylinder is fixedly connected to one end of the bottom of the movable seat 2. A limit rod 3 is slidably inserted inside the movable seat 2, and the limit rod 3 is set opposite the positioning core shaft 601.

[0030] A supporting block 4 is installed on the outer wall of both ends of the movable seat 2. A differential shell is provided on the outer sliding sleeve of the positioning core shaft 601. The two supporting blocks 4 can just hold up the differential shell.

[0031] Start the hydraulic cylinder at the bottom of the workbench 1, and the hydraulic cylinder drives the moving seat 2 to move in the vertical direction. It can stop when the limit rod 3 at its top corresponds to the position of the through hole at the bottom of the differential shell. Then push the limit rod 3 to insert it into the through hole at the bottom of the socket, and then install the supporting block 4 corresponding to the differential shell model, so that the supporting block 4 can just support the outer wall of the differential shell to ensure that the differential shell will not rotate at will during processing.

[0032] like Figure 1 As shown in FIG2 , a plurality of connection holes 5 are provided on both sides of the bottom of the workbench 1 , and the workbench 1 can be connected to external devices by passing bolts through the connection holes 5 .

[0033] like Figure 2 and Figure 4 As shown, a avoidance groove 705 is opened on the circumference of each of the three support columns 703. The three avoidance grooves 705 are arranged close to each other, which ensures the supporting effect of the support columns 703 while not affecting the normal placement of the differential shell.

[0034] The utility model provides a fixture for machining threaded holes in differential shells, and the specific working principle is as follows:

[0035] When the device is working, the differential shell is sleeved on the outside of the positioning core shaft 601. If the inner diameter of the middle hole of the differential shell is consistent with the outer diameter of the positioning core shaft 601, the positioning can be directly achieved. If the inner diameter of the middle hole is larger than the outer diameter of the positioning core shaft 601, the docking ring 604 is first sleeved on the outside of the positioning core shaft 601, and then the middle piece hole of the differential shell is sleeved on the outside of a corresponding step, the positioning of the differential shell can also be achieved, which is beneficial to improve the adaptability of the fixture. Then the screw 603 is inserted into the interior of the positioning core shaft 601, and then it contacts the locking seat 602, and then the screw 603 is rotated to screw it into the locking seat 602. The screw 603 will drive a docking ring 604 sleeved on its outside to squeeze on the top of the differential shell, which can not only limit the state of the differential shell, but also fix the differential shell to prevent it from deflecting at will, and then adjust the support column. The position of 703 makes its top just contact with the bottom wall of the differential shell, and the screw rod 702 is driven to rotate by the knob, and the support column 703 that is restricted from rotating by the limit rod 704 will be driven by the screw rod 702 to move in the vertical direction, which is beneficial to increasing the adaptability of the device. With the support of multiple support columns 703, the stability of the differential shell is greatly improved, so that the differential shell will not be skewed at will during processing. Finally, the hydraulic cylinder at the bottom of the workbench 1 is started, and the hydraulic cylinder drives the moving seat 2 to move in the vertical direction. When the limit plug 3 at its top corresponds to the position of the through hole at the bottom of the differential shell, it can be stopped, and then the limit plug 3 can be pushed to insert into the through hole at the bottom of the jack, and then the support block 4 corresponding to the differential shell model is installed, so that the support block 4 can just support the outer wall of the differential shell to ensure that the differential shell will not rotate at will during processing.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixture for machining threaded holes in differential shells, comprising a workbench (1), characterized in that: A clamping assembly (6) is installed on the top of the workbench (1), and a through hole is opened in the middle of the workbench (1). The clamping assembly (6) includes a positioning core shaft (601) fixedly installed inside the through hole of the workbench (1), and a locking seat (602) is fixedly connected to the outer wall of the bottom of the positioning core shaft (601). A screw (603) is slidably inserted into the interior of the positioning core shaft (601), and the screw (603) can be threadedly connected to the interior of the locking seat (602). The outer walls of the circumference of the positioning core shaft (601) and the screw (603) are both slidably sleeved with a docking ring (604), and the two docking rings (604) are both arranged in a stepped shape.

2. The fixture for machining threaded holes in differential housings according to claim 1, characterized in that: Three support assemblies (7) are installed on the top outer wall of the workbench (1), and the three support assemblies (7) are distributed around the outside of the positioning core shaft (601).

3. The fixture for machining threaded holes in differential housings according to claim 2, characterized in that: The support assembly (7) comprises a mounting seat (701) fixedly connected to the outer wall of the top of the workbench (1); the outer wall of the top of the mounting seat (701) is rotatably connected to a screw rod (702); the outer thread of the screw rod (702) is provided with a support column (703); the mounting seat (701) and the workbench (1) are slidably connected to two limiting rods (704); one end of each of the two limiting rods (704) is fixedly connected to the support column (703).

4. The fixture for machining threaded holes in differential housings according to claim 1, characterized in that: A movable seat (2) is slidably inserted into the interior of the workbench (1), a hydraulic cylinder is fixedly installed on the inner wall of the top of the workbench (1), and the output end of the hydraulic cylinder is fixedly connected to one end of the bottom of the movable seat (2), a limiting rod (3) is slidably inserted into the interior of the movable seat (2), and the limiting rod (3) is arranged opposite to the positioning core shaft (601).

5. The fixture for machining threaded holes in differential housings according to claim 4, characterized in that: A supporting block (4) is detachably mounted on the outer walls of both ends of the movable seat (2), and a differential shell is provided on the outer sliding sleeve of the positioning core shaft (601). The two supporting blocks (4) can just hold up the differential shell.

6. The fixture for machining threaded holes in differential housings according to claim 1, characterized in that: A plurality of connection holes (5) are provided on both sides of the bottom of the workbench (1).

7. The fixture for machining threaded holes in differential housings according to claim 3, characterized in that: Each of the three support columns (703) is provided with an avoidance groove (705) on its circumference, and the three avoidance grooves (705) are arranged close to each other.

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