Fine milling device for automobile hub bearing

Abstract

The utility model discloses an automobile hub bearing finish-milling device which comprises a machine tool, and a machining cutter and a driver for controlling the machining cutter to move are arranged on the machine tool. The machine tool is also provided with a clamp seat and a driver for controlling the clamp seat to rotate; a plurality of pneumatic clamping blocks capable of moving relative to the center are arranged on the clamp seat, and the top of each pneumatic clamping block is provided with a cushion piece capable of moving along the direction of the clamping block and is also provided with a positioning clamping column; the positioning clamping column is of a polyhedral structure, and a positioning groove corresponding to the positioning clamping column is formed in the pneumatic clamping block. Each surface of the positioning clamping column is sunken inwards to form a clamping part; according to the device, when the bearing piece is centered and adjusted in the clamping process, rolling friction is mainly generated between the bearing piece and the cushion piece, and therefore the bottom face of the bearing piece is not prone to being damaged by friction; after the clamping parts on the two sides of one face of the positioning clamping column are abraded, the positioning clamping column can be taken out and rotated to the other face to be continuously used, durability of the positioning clamping column is improved, meanwhile, all parts can be conveniently detached and replaced, and cost is saved.

Description

Technical Field

[0001] This utility model belongs to the field of bearing processing fixture technology, specifically relating to a precision milling device for automobile wheel hub bearings. Background Technology

[0002] Wheel bearings are key components of automobiles, consisting of an outer ring, roller bearings, an inner ring, and a cage. They primarily reduce friction through rolling friction. When the wheel rotates, the inner ring, outer ring, and rolling elements rotate together. The rolling elements utilize their circular surfaces to reduce friction, allowing the wheel to rotate more freely.

[0003] When machining automotive wheel hub bearings, the outer ring of the bearing needs to be precision milled. Generally, it is placed on a fixture, and the bearing is clamped by a clamping block on the fixture that can move towards the center, causing the bearing to rotate, and then milled by a cutting tool.

[0004] The above-mentioned machining fixture has the following defects: 1. The bearing parts are not accurately positioned when placed. They need to be centered and adjusted during the clamping process before clamping. As a result, the bearing parts will slide on the fixture seat, and the bottom surface of the bearing parts is easily damaged by friction; 2. When the clamping blocks are clamped, they all contact the bearing parts with one surface. After frequent contact, the clamping surface is easily worn, which affects the clamping accuracy. The clamping blocks are generally set as one piece, which requires the whole set to be replaced, which is inconvenient and costly. Utility Model Content

[0005] This utility model provides a precision milling device for automotive wheel hub bearings. When the bearing is centered during the clamping process, the bearing and the pad mainly experience rolling friction, thus the bottom surface of the bearing is not easily damaged by friction. When the clamping parts on both sides of one side of the positioning column are worn, they can be removed and rotated to the other side for continued use, improving the durability of the positioning column. At the same time, each component can be easily replaced, saving costs, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a precision milling device for automotive wheel hub bearings, comprising a machine tool, wherein the machine tool is equipped with a machining tool and a drive for controlling the displacement of the machining tool; the machine tool is also equipped with a fixture seat and a drive for controlling the rotation of the fixture seat; the fixture seat is equipped with a plurality of pneumatic clamping blocks that can be displaced relative to a center, the top of the pneumatic clamping blocks is equipped with a pad that can move along the direction of the clamping blocks, and a positioning clamping column is also provided.

[0007] Preferably, the positioning clamping post has a polyhedral structure, and the pneumatic clamping block is provided with a positioning groove corresponding to the positioning clamping post.

[0008] Preferably, each face of the positioning clamp is recessed inward to form a clamping portion located between adjacent faces along the height direction of the column, and the clamping portion has no sharp edges.

[0009] Preferably, the cross-section of the pad is circular, the pneumatic clamping block is provided with a corresponding arc groove, the top surface of the pad is exposed, and the arc groove passes through the positioning groove.

[0010] Preferably, each surface of the positioning clamp is provided with a groove corresponding to the pad.

[0011] Preferably, the positioning clamping post is provided with a positioning screw hole at the bottom of each face, and the pneumatic clamping block fixes the positioning clamping post through the positioning screw hole by positioning screws.

[0012] Preferably, the positioning clamp is located at one end of the pneumatic clamp block near the center of the clamp seat.

[0013] Preferably, the positioning clamp is located at the end of the pneumatic clamp block away from the center of the clamp seat.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. When the bearing is centered during the clamping process, the bearing will only slide on the pad, and the pad can roll or slide along the circular groove under the action of the bearing. The friction between the bearing and the pad is mainly rolling friction, so the bottom surface of the bearing is not easily damaged by friction.

[0016] 2. When the clamping parts on both sides of one side of the positioning clamping post are worn, it can be removed and rotated to the other side for continued use, which improves the durability of the positioning clamping post and the clamping accuracy. At the same time, each part can be easily replaced, saving costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a top view of the fixture structure of this utility model;

[0019] Figure 3 This is a top view schematic diagram of the pneumatic clamping block, pad, and positioning clamping column of this utility model;

[0020] Figure 4 This is a front view structural diagram of the pneumatic clamping block, pad, and positioning clamping column of this utility model.

[0021] Figure 5 This is a cross-sectional structural diagram of the pneumatic clamping block, pad, and positioning clamping column of this utility model.

[0022] In the diagram: 1. Machine tool; 2. Machining tool; 3. Fixture base; 4. Pneumatic clamping block; 5. Pad; 6. Positioning clamping post; 7. Positioning groove; 8. Clamping part; 9. Groove; 10. Positioning screw hole; 11. Positioning screw. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a precision milling device for automotive wheel hub bearings, including a machine tool 1, on which a machining tool 2 is mounted, and a drive to control the displacement of the machining tool 2; the machine tool 1 is also equipped with a fixture seat 3, and a drive to control the rotation of the fixture seat 3; the fixture seat 3 is equipped with multiple pneumatic clamping blocks 4 that can be displaced relative to the center, and the top of the pneumatic clamping blocks 4 is equipped with pads 5 that can move along the direction of the clamping blocks, and also equipped with positioning clamping columns 6; during precision milling on the machine tool 1, the bearing component is placed on three pads 5. When the placement is not accurately centered, it needs to be centered and adjusted during the clamping process. The three pneumatic clamping blocks 4 move in the center to clamp the bearing component, while the bearing component only adjusts and slides on the pads 5, and the pads 5 can roll or slide along the circular groove under the action of the bearing component. The friction between the bearing component and the pads 5 is mainly rolling friction, so the bottom surface of the bearing component is not easily damaged by friction.

[0025] Specifically, the positioning clamping post 6 has a polyhedral structure, and the pneumatic clamping block 4 is provided with a positioning groove 7 corresponding to the positioning clamping post 6. In this embodiment, the polyhedral structure allows the positioning clamping post 6 to be used again after one side is worn, by rotating it to the other side, thereby improving the overall durability.

[0026] Specifically, each face of the positioning column 6 is recessed inward to form a clamping part 8 located between adjacent faces along the height direction of the column. The clamping part 8 has no sharp edges. In this embodiment, the clamping part 8 along the height direction of the column facilitates the clamping of the bearing component, and the structure without sharp edges avoids scratching the bearing component.

[0027] Specifically, the cross-section of the pad 5 is circular, the pneumatic clamp 4 is provided with a corresponding arc groove, the top surface of the pad 5 is exposed, and the arc groove passes through the positioning groove 7; in this embodiment, the pad 5 can roll along the arc groove under the action of the bearing component, so that rolling friction is formed between the bearing component and the pad 5, thereby reducing the wear on the bottom surface of the bearing component.

[0028] Specifically, each surface of the positioning clamping post 6 is provided with a groove 9 corresponding to the pad 5; in this embodiment, the pad 5 can be directly slid into the groove 9, so that when the bearing is clamped by the positioning clamping post 6, the bearing can still be supported by the pad 5 below.

[0029] Specifically, the positioning clamping post 6 is provided with a positioning screw hole 10 at the bottom of each face, and the pneumatic clamping block 4 fixes the positioning clamping post 6 through the positioning screw hole 10 by the positioning screw 11. In this embodiment, the positioning screw 11 and the positioning screw hole 10 cooperate to fix the positioning clamping post 6 on the pneumatic clamping block 4, further enhancing the stability during clamping. The positioning screw hole 10 is provided on each face so that it can still cooperate with the positioning screw 11 for positioning after rotation and adjustment.

[0030] Specifically, the positioning clamping post 6 is located at one end of the pneumatic clamping block 4 near the center of the clamping seat 3; in this embodiment, by setting the positioning clamping post 6 inside the pneumatic clamping block 4, this clamp is suitable for clamping the bearing from the inside, which is beneficial for processing the outer edge of the bearing component.

[0031] Specifically, the positioning clamping post 6 is located at one end of the pneumatic clamping block 4 away from the center of the clamping seat 3; in this embodiment, by setting the positioning clamping post 6 on the outside of the pneumatic clamping block 4, this clamp is suitable for clamping the bearing from the outside, which is beneficial for the internal processing of the bearing components.

[0032] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0033] Working principle: During precision milling on machine tool 1, the bearing component is placed on three pads 5. If the placement is not accurately centered, it needs to be centered during clamping. Three pneumatic clamping blocks 4 move in the center to clamp the bearing component, while the bearing component only slides on the pads 5. The pads 5 can roll or slide along the circular groove under the action of the bearing component. The friction between the bearing component and the pads 5 is mainly rolling friction, so the bottom surface of the bearing component is not easily damaged by friction. The positioning clamping column 6 clamps the bearing component through the clamping part 8, and then drives the fixture seat 3 and the bearing component to rotate, and performs precision milling through the machining tool 2. When the clamping parts 8 on both sides of one side are worn, the positioning screws 11 can be unscrewed, and then the positioning clamping column 6 can be taken out from the positioning groove 7 and rotated to the other side for continued use, thereby improving the durability of the positioning clamping column 6 and the clamping accuracy. At the same time, the components can be easily replaced, saving costs.

[0034] 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 precision milling device for automobile wheel hub bearings, comprising a machine tool (1), characterized in that, The machine tool (1) is equipped with a machining tool (2) and a drive to control the displacement of the machining tool (2); the machine tool (1) is also equipped with a fixture seat (3) and a drive to control the rotation of the fixture seat (3); the fixture seat (3) is equipped with a plurality of pneumatic clamping blocks (4) that can be displaced relative to the center, the top of the pneumatic clamping block (4) is equipped with a pad (5) that can move along the clamping block direction, and is also equipped with a positioning clamping column (6).

2. The precision milling device for automotive wheel hub bearings according to claim 1, characterized in that, The positioning clamp (6) has a polyhedral structure, and the pneumatic clamp (4) is provided with a positioning groove (7) corresponding to the positioning clamp (6).

3. The precision milling device for automotive wheel hub bearings according to claim 2, characterized in that, Each face of the positioning clamp (6) is recessed inward to form a clamping part (8) located between adjacent faces along the height direction of the column, and the clamping part (8) has no sharp edges.

4. The precision milling device for automotive wheel hub bearings according to claim 3, characterized in that, The cross-section of the pad (5) is circular, the pneumatic clamp (4) is provided with a corresponding arc groove, the top surface of the pad (5) is exposed, and the arc groove passes through the positioning groove (7).

5. The precision milling device for automotive wheel hub bearings according to claim 4, characterized in that, Each of the positioning clamps (6) has a groove (9) on each side corresponding to the pad (5).

6. The precision milling device for automotive wheel hub bearings according to claim 5, characterized in that, The positioning clamp (6) has a positioning screw hole (10) at the bottom of each face, and the pneumatic clamp (4) fixes the positioning clamp (6) through the positioning screw hole (10) by the positioning screw (11).

7. The precision milling device for automotive wheel hub bearings according to claim 1, characterized in that, The positioning clamp (6) is located at one end of the pneumatic clamp (4) near the center of the clamp seat (3).

8. The precision milling device for automotive wheel hub bearings according to claim 1, characterized in that, The positioning clamp (6) is located at one end of the pneumatic clamp (4) away from the center of the clamp seat (3).

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