A machining and positioning fixture for axle shaft

Abstract

The utility model relates to axle shaft machining technical field and disclose a kind of axle shaft machining positioning fixture, including connecting plate.The axle shaft machining positioning fixture is set to drive mechanism, when using, axle shaft is placed in two wedge-shaped clamping block middle part, then the drive motor of one side is started, drive motor drives positive and negative screw rod rotation, so that the relative motion of the two clamping plates of positive and negative screw rod surface screw connection occurs under the limiting of one side limit rod, and axle shaft in middle part is firmly clamped and fixed, the sliding plate of the sliding plate inside setting scale plate set in clamping plate one side, can be realized in the process of clamping to the diameter of axle shaft measurement, both realize the stable clamping positioning of axle shaft, and the real-time accurate monitoring of diameter size in clamping process is achieved, need not to operate by additional measuring tool, and the step of subsequent measurement is shortened.

Description

Technical Field

[0001] This utility model relates to the field of axle half-shaft machining technology, and in particular to a positioning fixture for axle half-shaft machining. Background Technology

[0002] As a core load-bearing and power transmission component of the automotive transmission system, the axle half-shaft directly affects the vehicle's stability, safety, and transmission efficiency. Its machining process requires high-precision machining of key parts such as journals, splines, and flanges through turning, milling, and grinding. The positioning fixture, as the reference and guarantee device during half-shaft machining, directly determines the final dimensional tolerances, geometric tolerances, and batch production consistency of the half-shaft through its clamping stability, positioning accuracy, and operational efficiency. With the automotive industry moving towards lightweight and high-load-bearing designs, traditional positioning fixtures are gradually becoming inadequate for modern production needs.

[0003] A positioning fixture for machining an automotive half-shaft is disclosed in publication number CN220029949U. This fixture includes a machining component, a positioning component, a clamping component, and a limiting component. The machining component includes a machining table with a guide rail connected to its top. A mounting base is connected to the outer ring of the guide rail. A base groove is formed on the lower inner side of the mounting base. A clamping block is connected to the output end of a hydraulic cylinder. A base plate slot is formed on the inner side of the limiting base plate, and a limiting insert plate is connected to the inner side of the base plate slot. After the half-shaft workpiece is smoothly placed in the positioning slot, the hydraulic cylinder is started. The output end of the hydraulic cylinder advances forward, driving the clamping block to move synchronously until the clamping slot engages with the half-shaft workpiece, simultaneously clamping the half-shaft workpiece between the clamping slot and the positioning slot. Finally, a CNC machine tool is started to machine the half-shaft workpiece.

[0004] While the aforementioned patent achieves the goal of smoothly placing the half-shaft workpiece into the positioning slot, then activating the hydraulic cylinder, which advances forward and synchronously moves the clamping blocks until the clamping slot engages with the half-shaft workpiece, simultaneously securing it between the clamping and positioning slots, and finally starting the CNC machine tool for machining, this fixture lacks integrated measurement capabilities. After clamping and positioning the half-shaft, an additional step is required for dimensional inspection. If positioning deviations are found, disassembly, adjustment, and re-clamping are necessary, resulting in "secondary rework." This process not only increases labor costs and processing time but also risks scratching the half-shaft surface or shifting the positioning reference due to repeated clamping, further reducing machining accuracy. Utility Model Content

[0005] (a) Technical problems to be solved The purpose of this utility model is to provide a positioning fixture for machining axle half shafts, so as to solve the problem mentioned in the background art of lacking measurement function during the workpiece clamping process.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a positioning fixture for machining axle half shafts, comprising a connecting plate, a driving mechanism fixedly connected to one side of the connecting plate, an extension block fixedly connected to the back of the connecting plate, an adjusting mechanism threadedly connected to the surface of the extension block, an angle plate mounted on one side of the extension block, an indicator arrow rotatably connected to the surface of the angle plate, the driving mechanism comprising a driving motor fixedly connected to one side of the connecting plate, a positive and negative lead screw fixedly connected to the output end of the driving motor, a clamping plate threadedly connected to the surface of the positive and negative lead screw, a sliding plate fixedly connected to one side of the clamping plate, a scale plate slidably connected inside the sliding plate, and a wedge-shaped clamping block fixedly connected to the surface of the clamping plate; the adjusting mechanism comprising a fixed joint threadedly connected to the surface of the extension block, a hydraulic rod rotatably connected to the surface of the fixed joint, and a rotating interface rotatably connected to the top of the hydraulic rod.

[0007] As a further embodiment of this utility model, a rotating rod is fixedly connected to one side of the extension block, and a support ring is rotatably connected to the surface of the rotating rod. The indicator arrow is fixedly connected to the surface of the support ring. The rotating rod serves to drive the connecting plate to rotate.

[0008] As a further embodiment of this utility model, a support block is fixedly connected to one side of the support ring. The support block is threaded to the surface of the rotating interface. The support block serves to support the hydraulic rod.

[0009] As a further embodiment of this utility model, a base is fixedly connected to the bottom of the support block, and the base is threadedly connected to an external connection structure. The base serves to connect the support block.

[0010] As a further embodiment of this utility model, a PLC controller is mounted on the surface of the support block. One side of the PLC controller is electrically connected to one side of the drive motor via a power line. The drive motor is configured to drive the forward and reverse lead screws to rotate.

[0011] As a further embodiment of this utility model, both the fixed joint and the rotating interface have threaded holes on their surfaces, and the threaded holes are internally connected to threaded posts. The threaded posts serve to fix the rotating joint.

[0012] (III) Beneficial Effects This utility model provides a positioning fixture for machining axle half-shafts, which has the following advantages: 1. This axle half-shaft machining and positioning fixture, through the setting of the drive mechanism, allows the axle half-shaft to be placed in the middle of two wedge-shaped clamping blocks during use. Then, the drive motor on one side is started, and the drive motor drives the positive and negative lead screws to rotate. This causes the two clamping plates connected by threads on the surfaces of the positive and negative lead screws to move relative to each other under the limitation of the limit rod on one side, firmly clamping and fixing the axle half-shaft in the middle. With the help of the sliding plate on one side of the clamping plate and the scale plate inside the sliding plate, the diameter of the axle half-shaft can be measured during the clamping process. This achieves both stable clamping and positioning of the axle half-shaft and real-time accurate monitoring of the diameter during the clamping process, without the need for additional measuring tools, thus shortening the subsequent measurement steps.

[0013] 2. This axle half-shaft machining positioning fixture, through the setting of the adjustment mechanism, angle plate, and indicator arrow, allows for multi-angle machining of the clamped axle half-shaft during use. The hydraulic rod on one side can be activated, extending and retracting to rotate the connecting plate on the end fixed joint against the support ring surface with the cooperation of a rotating rod on one side. Since the support ring surface is equipped with indicator arrows, the angle plate on one side rotates along the indicator arrows during the rotation of the extension block. This allows the operator to clearly observe the rotation angle of the axle half-shaft, enabling flexible multi-angle adjustment after clamping. Furthermore, the combination of the angle plate and indicator arrows visually presents the rotation angle, providing a clear angular reference for high-precision multi-angle machining. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the drive mechanism structure of this utility model; Figure 3 This is a schematic diagram of the adjustment mechanism of this utility model; Figure 4 This is a schematic diagram of the angle plate structure of this utility model.

[0015] In the diagram: 1. Connecting plate; 2. Drive mechanism; 201. Drive motor; 202. Positive and negative lead screws; 203. Clamping plate; 204. Sliding plate; 205. Scale plate; 206. Wedge-shaped clamping block; 3. Extension block; 4. Adjustment mechanism; 401. Fixed joint; 402. Hydraulic rod; 403. Rotation interface; 5. Angle plate; 6. Indicating arrow; 7. Limiting rod; 8. Rotating rod; 9. Support ring; 10. Support block; 11. Base; 12. PLC controller; 13. Threaded column. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] Implementation Column 1 Please see Figures 1 to 4 This utility model provides a technical solution: a positioning fixture for machining axle half shafts, including a connecting plate 1. A driving mechanism 2 is fixedly connected to one side of the connecting plate 1. The driving mechanism 2 achieves both stable clamping and positioning of the axle half shaft and real-time accurate monitoring of its diameter during clamping, eliminating the need for additional measuring tools and shortening subsequent measurement steps. An extension block 3 is fixedly connected to the back of the connecting plate 1. A rotating rod 8 is fixedly connected to one side of the extension block 3. A support ring 9 is rotatably connected to the surface of the rotating rod 8. An indicator arrow 6 is fixedly connected to the surface of the support ring 9. An adjustment mechanism 4 is threadedly connected to the surface of the extension block 3. Through the adjustment mechanism 4, angle plate 5, and indicator arrow 6, flexible multi-angle adjustment of the axle half shaft after clamping is achieved. The rotation angle is visually presented through the cooperation of the angle plate 5 and the indicator arrow 6, providing a clear angle reference for high-precision multi-angle machining. An angle plate 5 is installed, and an indicator arrow 6 is rotatably connected to the surface of the angle plate 5. The drive mechanism 2 includes a drive motor 201 fixedly connected to one side of the connecting plate 1. A positive and negative lead screw 202 is fixedly connected to the output end of the drive motor 201. A clamping plate 203 is threadedly connected to the surface of the positive and negative lead screw 202. A limit hole is opened on one side of the clamping plate 203. A limit rod 7 is slidably connected inside the limit hole. A sliding plate 204 is fixedly connected to one side of the clamping plate 203. A scale plate 205 is slidably connected inside the sliding plate 204. A wedge-shaped clamping block 206 is fixedly connected to the surface of the clamping plate 203. The adjustment mechanism 4 includes a fixed joint 401 threadedly connected to the surface of the extension block 3. Threaded holes are opened on the surfaces of the fixed joint 401 and the rotating interface 403. A threaded post 13 is threadedly connected inside the threaded hole. A hydraulic rod 402 is rotatably connected to the surface of the fixed joint 401. A rotating interface 403 is rotatably connected to the top of the hydraulic rod 402. Furthermore, a support block 10 is fixedly connected to one side of the support ring 9. The support ring 9 is a core connecting component, forming an integral support structure with the support block 10 through a fixed connection, providing a stable installation foundation for related components, and transmitting support force to the support block 10. The support block 10 is threadedly connected to the surface of the rotating interface 403. A base 11 is fixedly connected to the bottom of the support block 10. The support block 10 is a key connecting hub, linked with the rotating interface 403 through a threaded connection. The bottom is connected to the base 11 to achieve overall fixation. The surface of the base 11 supports the PLC controller 12, which plays the role of connecting, supporting, and integrating components. The base 11 is threadedly connected to the external connection structure. The surface of the support block 10 is equipped with the PLC controller 12. One side of the PLC controller 12 is electrically connected to one side of the drive motor 201 through a power line. The PLC controller 12 is the control core, installed on the surface of the support block 10, and electrically connected to the drive motor 201 through a power line. It is responsible for receiving signals and controlling the operation of the drive motor 201 to realize the automated control function of the equipment.

[0018] In this invention, the working steps of the device are as follows: First step: When using the vehicle, place the axle half shaft in the middle of the two wedge-shaped clamps 206, and then start the drive motor 201 on one side. The drive motor 201 drives the positive and negative lead screws 202 to rotate, so that the two clamping plates 203 connected by the threads on the surface of the positive and negative lead screws 202 move relative to each other under the limit of the limit rod 7 on one side, and firmly clamp and fix the axle half shaft in the middle. With the cooperation of the sliding plate 204 on one side of the clamping plate 203 and the scale plate 205 inside the sliding plate 204, the diameter of the axle half shaft can be measured during the clamping process. The second step: When using the axle half shaft, if it is necessary to perform multi-angle processing on the clamped axle half shaft, the hydraulic rod 402 on one side can be activated. The hydraulic rod 402 extends and retracts, and drives the connecting plate 1 on the end fixed joint 401 to rotate on the surface of the support ring 9 with the cooperation of the rotating rod 8 on one side. Since the surface of the support ring 9 is provided with the indicator arrow 6, the angle plate 5 on one side of the extension block 3 rotates on the indicator arrow 6 during the rotation process, so as to facilitate the staff to clearly observe the size of the rotation angle of the axle half shaft.

[0019] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0020] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for machining axle half shafts, comprising a connecting plate (1), characterized in that: A drive mechanism (2) is fixedly connected to one side of the connecting plate (1), an extension block (3) is fixedly connected to the back of the connecting plate (1), an adjustment mechanism (4) is threadedly connected to the surface of the extension block (3), an angle plate (5) is installed on one side of the extension block (3), and an indicator arrow (6) is rotatably connected to the surface of the angle plate (5). The driving mechanism (2) includes a drive motor (201) fixedly connected to one side of the connecting plate (1). The output end of the drive motor (201) is fixedly connected to a positive and negative lead screw (202). The surface of the positive and negative lead screw (202) is threadedly connected to a clamping plate (203). A sliding plate (204) is fixedly connected to one side of the clamping plate (203). A scale plate (205) is slidably connected inside the sliding plate (204). A wedge-shaped clamping block (206) is fixedly connected to the surface of the clamping plate (203). The adjustment mechanism (4) includes a fixed joint (401) threaded to the surface of the extension block (3), a hydraulic rod (402) rotatably connected to the surface of the fixed joint (401), and a rotating interface (403) rotatably connected to the top of the hydraulic rod (402).

2. The axle half-shaft machining positioning fixture according to claim 1, characterized in that: A limiting hole is provided on one side of the clamping plate (203), and a limiting rod (7) is slidably connected inside the limiting hole.

3. The axle half-shaft machining positioning fixture according to claim 1, characterized in that: A rotating rod (8) is fixedly connected to one side of the extension block (3), and a support ring (9) is rotatably connected to the surface of the rotating rod (8). The indicator arrow (6) is fixedly connected to the surface of the support ring (9).

4. The axle half-shaft machining positioning fixture according to claim 3, characterized in that: A support block (10) is fixedly connected to one side of the support ring (9), and the support block (10) is threaded to the surface of the rotating interface (403).

5. A positioning fixture for machining axle half-shafts according to claim 4, characterized in that: The bottom of the support block (10) is fixedly connected to a base (11), which is threaded to an external connection structure.

6. The axle half-shaft machining positioning fixture according to claim 4, characterized in that: A PLC controller (12) is mounted on the surface of the support block (10), and one side of the PLC controller (12) is electrically connected to one side of the drive motor (201) via a power line.

7. The axle half-shaft machining positioning fixture according to claim 1, characterized in that: Both the fixed joint (401) and the rotating interface (403) have threaded holes on their surfaces, and the threaded holes are internally connected to threaded posts (13).

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