Self-centering clamp

Abstract

The utility model discloses a self-centering clamp which is characterized by consisting of a rotating shaft, a rotating disc, a movable positioning piece, a positioning bearing, a linear guide rail, a base, a rotating bearing and a return spring, according to the clamp, the rotating shaft drives the rotating disc to drive the movable positioning piece to move along the linear guide rail to complete the self-centering action, the rotating disc is of an involute petal type structure formed by cutting a steel plate through laser, and the clamp is suitable for various products with the diameter range and high in positioning precision; the movable positioning piece is connected with the linear guide rail through bolts to move, and moving is smooth and high in precision. A bearing is adopted for contact positioning with a workpiece and is wear-resistant and reliable; and the return spring ensures reliable contact between the movable positioning piece and the rotating disc, so that the positioning precision is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of welding fixtures, in particular to a self-centering fixture suitable for self-centering and positioning of circular inner hole workpieces. Background Art

[0002] At present, the axle welding positioning fixture generally uses the inner hole of the reinforcement ring as the main positioning reference. During positioning, a cylinder is used to push and pull the conical wedge to complete the self-centering action. However, due to the small stroke of the conical wedge, it cannot meet the needs of multiple varieties of products with a wide range of diameters. When changing varieties, the corresponding wedge needs to be replaced, which wastes time and is inefficient. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a self-centering clamp.

[0004] The technical solution provided by the utility model is: a self-centering clamp, which is special in that it consists of a rotating shaft, a rotating disk, a movable positioning piece, a positioning bearing, a linear guide rail, a base, a rotating bearing, and a return spring; the rotating shaft is connected to the base through a rotating bearing to ensure the rotation of the rotating shaft; the rotating shaft is fixedly connected to the rotating disk, and the rotating shaft drives the rotating disk to rotate; the movable positioning piece is connected to the base through a linear guide rail, and the movable positioning piece moves along the linear guide rail; the positioning bearing and the movable positioning piece are connected together, the positioning bearing is pressed against the rotating disk through a return spring, and the rotation of the rotating disk pushes the positioning bearing to drive the movable positioning piece to move.

[0005] Furthermore, the rotating disk is a steel plate laser cut into an involute petal-shaped structure.

[0006] Furthermore, the movable positioning member is connected to the linear guide rail via bolts.

[0007] Furthermore, the locating bearing is connected together through a transition fit and a movable locating piece.

[0008] Furthermore, the base is a fixed supporting component.

[0009] Beneficial effects of the utility model:

[0010] 1. The rotating disk is laser cut from steel plate into an involute petal-shaped structure, which is suitable for products with a wide range of diameters and has high positioning accuracy;

[0011] 2. The mobile positioning parts are connected to the linear guide rails through bolts, and the movement is smooth and accurate;

[0012] 3. The bearing is used to contact and locate the workpiece, which is wear-resistant and reliable;

[0013] 4. The return spring ensures reliable contact between the moving positioning part and the rotating disk, ensuring positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a structural schematic diagram of a rotating disk of the utility model.

[0016] In the figure: 1. rotating shaft, 2. rotating disk, 3. movable positioning member, 4. positioning bearing, 5. linear guide, 6. base, 7. rotating bearing, 8. return spring. DETAILED DESCRIPTION

[0017] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings.

[0018] like Figure 1 , 2 As shown, a self-centering fixture is composed of a rotating shaft 1, a rotating disk 2, a movable positioning member 3, a positioning bearing 4, a linear guide 5, a base 6, a rotating bearing 7, and a return spring 8; the rotating disk 2 is a steel plate laser cut into an involute petal-shaped structure;

[0019] The base 6 is a fixed support component of the entire device; the rotating shaft 1 is connected to the base 6 through a rotating bearing 7 to ensure the rotation of the rotating shaft 1; the rotating shaft 1 and the rotating disk 2 are welded together, and the rotating shaft 1 drives the rotating disk 2 to rotate; the movable positioning member 3 is connected to the base 6 through a linear guide 5, and the movable positioning member 3 is connected to the linear guide 5 by bolts, and the movable positioning member 3 can move along the linear guide 5; the positioning bearing 4 is connected to the movable positioning member 3 through a transition fit, and the positioning bearing 4 is pressed against the rotating disk 2 through a return spring 8. The rotation of the rotating disk 2 pushes the positioning bearing 4 to drive the movable positioning member 3 to move, thereby completing the self-centering action.

[0020] The utility model discloses a self-centering clamp, which utilizes a rotating shaft to drive a rotating disk to drive a movable positioning part to move along a linear guide rail to complete a self-centering action. The rotating disk is a steel plate laser cut into an involute petal-shaped structure, which is suitable for products of various diameter ranges and has high positioning accuracy. The movable positioning part is connected to the linear guide rail by bolts and moves smoothly and accurately. The contact and positioning with the workpiece adopts a bearing, which is wear-resistant and reliable. The return spring ensures the reliable contact between the movable positioning part and the rotating disk, thereby ensuring the positioning accuracy.

[0021] It should be understood that the technical features not elaborated in this specification belong to the prior art. Although the implementation methods of the utility model patent are described above in conjunction with the drawings, the utility model is not limited to the above specific implementation methods, which are only illustrative and not restrictive. Ordinary technicians in this field can make more forms under the enlightenment of the utility model without departing from the scope of protection of the purpose of the utility model and the claims, which are all within the protection scope of the utility model.

Claims

1. A self-centering fixture, characterized in that: The invention comprises a rotating shaft (1), a rotating disk (2), a movable positioning member (3), a positioning bearing (4), a linear guide rail (5), a base (6), a rotating bearing (7), and a return spring (8); the rotating shaft (1) is connected to the base (6) via the rotating bearing (7) to ensure the rotation of the rotating shaft (1); the rotating shaft (1) and the rotating disk (2) are fixedly connected together, and the rotating shaft (1) drives the rotating disk (2) to rotate; the movable positioning member (3) is connected to the base (6) via the linear guide rail (5), and the movable positioning member (3) moves along the linear guide rail (5); the positioning bearing (4) and the movable positioning member (3) are connected together, and the positioning bearing (4) is pressed against the rotating disk (2) via the return spring (8), and the rotating disk (2) rotates to push the positioning bearing (4) to drive the movable positioning member (3) to move.

2. A self-centering fixture according to claim 1, characterized in that: The rotating disk (2) is a steel plate laser cut into an involute petal-shaped structure.

3. A self-centering fixture according to claim 1, characterized in that: The movable positioning member (3) is connected to the linear guide rail (5) via bolts.

4. A self-centering fixture according to claim 1, characterized in that: The locating bearing (4) is connected with the movable locating member (3) through a transition fit.

5. A self-centering fixture according to claim 1, characterized in that: The base (6) is a fixed supporting component.

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