Wear-resistant cam shaft polishing clamping arm

Abstract

The utility model discloses a wear-resisting camshaft polishing clamping arm which comprises a clamping arm body and a pair of polishing heads, the pair of polishing heads are symmetrically arranged on the upper side and the lower side of the clamping position of the clamping arm body, the roots of the polishing heads are arranged in the clamping arm body, and the polishing heads are fixedly connected with the clamping arm body through installation holes formed in the middles. The head of each polishing head is a limiting boss, the limiting bosses are exposed out of the clamping arm body, each limiting boss is composed of two cambered surfaces which are in bilateral symmetry, each cambered surface is provided with a wear-resisting inlay made of hard alloy, the polishing heads on the upper side and the lower side can polish the cam shaft through the wear-resisting inlays, and polishing sand layers are arranged between the wear-resisting inlays and the cam shaft. By arranging the polishing head with the wear-resistant inlay, the camshaft polishing head has excellent wear resistance, is not easy to damage and deform, has long service life and good flatness, ensures the consistency of the polishing degree of the camshaft, and saves the cost as only the inlay part is made of hard alloy.

Description

Technical Field

[0001] The utility model relates to the technical field of camshaft processing, in particular to a wear-resistant camshaft polishing clamp arm. Background Art

[0002] The camshaft is a transmission component used in piston engines, and its function is to control the opening and closing of the valves. Usually, its rotation speed is very high, and it needs to withstand a large torque, so the design has high requirements for the strength and support of the camshaft. In order to meet the design requirements of the camshaft, it should have a high structural strength. In the prior art, not only the manufacturing material of the camshaft is strengthened, but also the structure of the camshaft is optimized. Generally, in order to reduce the rotational resistance of the camshaft, the camshaft will polish the surface of the cam after fine grinding the cam surface. The polishing head for polishing the camshaft is made of 45 steel, which has low wear resistance and is prone to wear during use. The efficiency of polishing the cam surface is low, which affects the production quality of the camshaft. Utility Model Content

[0003] In view of the defects of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a wear-resistant camshaft polishing clamp arm which is not easy to wear and has high wear resistance during camshaft polishing.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a wear-resistant camshaft polishing clamp arm, comprising a clamp arm body and a pair of polishing heads, a pair of polishing heads are symmetrically arranged on the upper and lower sides of the clamping position of the clamp arm body, the root of the polishing head is placed in the clamp arm body, the polishing head is fixedly connected to the clamp arm body through a mounting hole arranged in the middle, the head of the polishing head is a limiting boss, the limiting boss is exposed outside the clamp arm body, and the limiting boss is composed of two left-right symmetrical arc surfaces, each arc surface is provided with a wear-resistant inlay made of cemented carbide, the polishing heads on the upper and lower sides can polish the camshaft through the wear-resistant inlay, and a polishing sand layer is provided between the wear-resistant inlay and the camshaft.

[0005] Preferably, the wear-resistant inlay is fixedly connected to the polishing head by silver brazing.

[0006] Preferably, the polishing head is fixedly connected to the clamp arm body via a connecting shaft penetrating through the mounting hole, and a wear-resistant bushing is installed in the mounting hole to improve the connection strength.

[0007] Preferably, the limiting boss is composed of two symmetrical arcs with a radius of 14.3 mm, and the connection between the two arcs is transitioned by an arc with a radius of 0.75 mm.

[0008] Preferably, the curvature of the exposed end of the wear-resistant inlay matches the curvature of the head of the polishing head, the connecting surfaces of the wear-resistant inlay and the polishing head are both flat, and the side surface of the wear-resistant inlay is perpendicular to the bottom surface, which is easy to process and increases the connecting surface.

[0009] Preferably, the diameter of the mounting hole is 11 mm.

[0010] The beneficial effects of the utility model are as follows: by providing a polishing head with a wear-resistant inlay, the utility model has excellent wear resistance, is not easy to be damaged or deformed, has a long service life, has good flatness, ensures the consistency of the polishing degree of the camshaft, and only the inlay part uses hard alloy, which saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the assembly of the wear-resistant polishing head;

[0013] Figure 3 It is a schematic diagram of the structure of the wear-resistant polishing head;

[0014] Figure 4 for Figure 3 Left view of

[0015] In the figure: A-clamp arm body, B-polishing head, 1-wear-resistant inlay, 2-limiting boss, 3-mounting hole. DETAILED DESCRIPTION

[0016] In order to better understand the improvements made by the present invention relative to the prior art, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0017] like Figure 1 As shown in FIG. 4 , a wear-resistant camshaft polishing clamp arm is mainly composed of a clamp arm body A and a pair of polishing heads B.

[0018] A pair of polishing heads B are symmetrically arranged at the upper and lower sides of the clamping position of the clamp arm body A. The root of the polishing head B is placed in the clamp arm body A. The polishing head B is fixedly connected to the clamp arm body A through the mounting hole 3 arranged in the middle. The diameter of the mounting hole 3 is preferably 11 mm. The polishing head B is fixedly connected to the clamp arm body A through a connecting shaft penetrating through the mounting hole 3, and a wear-resistant bushing is installed in the mounting hole 3.

[0019] The head of the polishing head B is a limiting boss 2, which is exposed outside the clamping arm body A to limit the swing of the polishing head B. The limiting boss 2 is composed of two left-right symmetrical arc surfaces, wherein the arc surfaces are preferably two symmetrical arcs with a radius of 14.3 mm, and the connection between the two arcs is transitioned by an arc with a radius of 0.75 mm. Each arc surface is provided with a wear-resistant inlay 1 made of cemented carbide, and the wear-resistant inlay 1 is fixedly connected to the polishing head B by silver brazing. The curvature of the exposed end of the wear-resistant inlay 1 matches the arc surface of the head of the polishing head B, and the connection surface between the wear-resistant inlay 1 and the polishing head B is a plane, and the side surface of the wear-resistant inlay 1 is perpendicular to the bottom surface.

[0020] The polishing heads B on the upper and lower sides can polish the camshaft through the wear-resistant inlay 1, and a polishing sand layer is provided between the wear-resistant inlay 1 and the camshaft. When the camshaft rotates at high speed, the four wear-resistant inlays 1 fully polish the camshaft to ensure the consistency of the polishing degree of the camshaft.

[0021] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wear-resistant camshaft polishing clamp arm, comprising a clamp arm body (A) and a pair of polishing heads (B), wherein a pair of polishing heads (B) are symmetrically arranged on upper and lower sides of the clamping position of the clamp arm body (A), characterized in that: The root of the polishing head (B) is placed in the clamp arm body (A), and the polishing head (B) is fixedly connected to the clamp arm body (A) through a mounting hole (3) arranged in the middle. The head of the polishing head (B) is a limiting boss (2), and the limiting boss (2) is exposed outside the clamp arm body (A). The limiting boss (2) is composed of two left-right symmetrical arc surfaces, and each arc surface is provided with a wear-resistant inlay (1) made of cemented carbide. The polishing heads (B) on the upper and lower sides can grind the camshaft through the wear-resistant inlay (1), and a polishing sand layer is provided between the wear-resistant inlay (1) and the camshaft.

2. The wear-resistant camshaft polishing clamp arm according to claim 1, characterized in that: The wear-resistant inlay (1) is fixedly connected to the polishing head (B) by silver brazing.

3. The wear-resistant camshaft polishing clamp arm according to claim 1, characterized in that: The polishing head (B) is fixedly connected to the clamp arm body (A) via a connecting shaft penetrating through the mounting hole (3), and a wear-resistant bushing is installed in the mounting hole (3).

4. The wear-resistant camshaft polishing clamp arm according to claim 1, characterized in that: The limiting boss (2) is composed of two symmetrical arcs with a radius of 14.3 mm, and the connection between the two arcs is transitioned by an arc with a radius of 0.75 mm.

5. The wear-resistant camshaft polishing clamp arm according to claim 1, characterized in that: The curvature of the exposed end of the wear-resistant inlay (1) matches the curvature of the head of the polishing head (B), the connecting surfaces of the wear-resistant inlay (1) and the polishing head (B) are both planes, and the side surface of the wear-resistant inlay (1) is perpendicular to the bottom surface.

6. The wear-resistant camshaft polishing clamp arm according to claim 1, characterized in that: The diameter of the mounting hole (3) is 11 mm.

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