A detachable tooth tip wear-resistant high-strength excavator claw sleeve

Abstract

The utility model discloses a detachable tooth tip's wear -resisting high strength excavator claw sleeve, including connecting arm, snatchs, wear -resisting tooth tip and hinged part, the connecting arm lower extreme is equipped with connecting rod in, wear -resisting tooth tip realizes the preliminary fixation through the cooperation of L type pin groove on the bearing rod and connecting rod, and L type pin groove contains axial direction guide section and circumferential locking section, positioning mechanism realizes the firm locking of tooth tip and connecting arm through locating block, ring groove and locating screw, and snatchs extension part is supported by bracket and enhances the strength. This structure avoids the deformation and corrosion jam of traditional connection, and only needs to unscrew the screw and reversely rotates the tooth tip to dismount, and the operation is convenient, and the connection stability is improved, and the service life is prolonged, satisfies the efficient operation demand.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a wear-resistant, high-strength excavator claw sleeve with detachable tooth tips. Background Technology

[0002] As the core component for excavating and grabbing materials, the grab bucket's claw teeth directly contact hard materials such as ores and rocks. It is a high-frequency wear part and needs to be disassembled and replaced regularly to ensure operational efficiency. Currently, the industry mostly uses pins to pass through the pre-drilled holes in the claw sleeve and tooth tip of excavators, or bolts to lock the tooth tip to the end of the claw sleeve for fixation. However, excavators vibrate violently during operation, and the pins and bolts are prone to plastic deformation due to impact loads. At the same time, the working environment is often accompanied by dust and moisture, and the surface of the connecting parts is prone to rust and jamming. As a result, it is difficult to disassemble quickly after the tooth tip wears down, and heavy tools are needed for violent disassembly. This not only increases maintenance time, but also easily damages the claw sleeve body and reduces the reuse rate of the claw sleeve. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a wear-resistant, high-strength excavator claw sleeve with detachable tooth tips, thereby solving the problems mentioned in the background art.

[0004] To achieve the above technical objectives, the present invention provides a wear-resistant, high-strength excavator claw sleeve with detachable tooth tips, comprising a connecting arm. The connecting arm is a hollow curved beam with a gripper flap fixedly arranged on its inner arc surface. The upper part of the connecting arm is provided with a hinged part connected to the grab bucket body, and the lower end is provided with wear-resistant tooth tips. A connecting rod is provided inside the lower end of the connecting arm, and the two ends of the connecting rod are fixedly connected to the inner wall of the connecting arm. The wear-resistant tooth tip is an isosceles triangle with a bearing rod arranged on its base surface. One end of the bearing rod is perpendicularly connected to the wear-resistant tooth tip, and the other end is provided with a positioning mechanism and an L-shaped pin groove. The L-shaped pin groove cooperates with the connecting rod, and the positioning mechanism keeps the wear-resistant tooth tip fixed to the connecting arm.

[0005] Furthermore, the L-shaped pin groove includes an axial guide section and a circumferential locking section. The axial guide section is a rectangular groove opened along the axis of the bearing rod, and its width is slightly larger than the diameter of the connecting rod. The circumferential locking section is located at the bottom of the axial guide section and is an arc-shaped groove opened by rotating 90° around the axis of the bearing rod, and its inner diameter is equal to the diameter of the connecting rod.

[0006] Furthermore, the positioning mechanism includes a positioning block disposed at the bottom of the wear-resistant tooth tip. The positioning block is annular and coaxial with the bearing rod. The gripper is aligned with the lower end of the connecting arm, and both are provided with a communicating annular groove. The annular groove cooperates with the positioning block. Threaded through holes penetrating the annular groove are provided on both sides of the lower end of the gripper. The positioning block is provided with a threaded groove that is directly opposite to the threaded through hole. A positioning screw that is threadedly engaged with the threaded through hole is disposed in the threaded through hole.

[0007] Furthermore, the sides of the grabbing petal extend to both sides, and brackets supporting the extension of the grabbing petal are provided on both sides of the connecting arm.

[0008] Furthermore, the hinge portion includes a connecting bushing and a rotating bushing, wherein the connecting bushing is disposed at the top end of the connecting arm and connected to the grab bucket body, and the rotating bushing is connected to the piston rod of the grab cylinder.

[0009] Compared with the prior art, the beneficial effects of this utility model include: This invention achieves initial tooth tip fixation through the cooperation of L-shaped pin groove and connecting rod, and forms a double fixing structure by combining the circumferential locking of positioning block and positioning screw. This avoids the deformation, corrosion and jamming problems caused by vibration in traditional pin or bolt connections. During disassembly, it is only necessary to unscrew the positioning screw and rotate the tooth tip in the opposite direction to remove it. No heavy tools are required for violent disassembly, which greatly shortens maintenance time, reduces damage to the connecting arm body, and improves the reusability of the claw sleeve. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a wear-resistant, high-strength excavator claw sleeve with detachable tooth tips provided by this utility model; Figure 2 This is an exploded view of a wear-resistant, high-strength excavator claw sleeve with detachable tooth tips provided by this utility model. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0012] Reference Figure 1 , Figure 2This utility model provides a wear-resistant, high-strength excavator claw sleeve with detachable tooth tips, including a connecting arm 1, claw flaps 2, and wear-resistant tooth tips 3. The connecting arm 1 is made of a hollow curved beam structure of high-strength alloy, and a connecting rod 102 is fixed to the lower end of its inner wall. The connecting rod 102 is a cylindrical steel rod, and its two ends are fully welded to the inner wall of the connecting arm 1. The inner arc surface of the connecting arm 1 is fixedly installed with claw flaps 2, which are forged from wear-resistant alloy steel. Its sides extend to both sides to form extensions. Correspondingly, brackets 107 are welded to both sides of the connecting arm 1. The supporting surface of the brackets 107 fits against the lower surface of the extension of the claw flaps 2, realizing double support for the claw flaps 2 and preventing the claw flaps 2 from deforming under force during operation.

[0013] The upper part of the connecting arm 1 is equipped with a connecting bushing 108 and a rotating bushing 109. The connecting bushing 108 is welded to the top of the connecting arm 1 and is hinged to the grab body through a pin, so as to realize the relative rotation between the connecting arm 1 and the grab body. The rotating bushing 109 is welded to the corresponding position on the upper part of the connecting arm 1 and is connected to the piston rod of the grab cylinder through a pin, so as to realize the opening and closing operation of the connecting arm 1 by means of the cylinder drive.

[0014] The wear-resistant tooth tip 3 has an isosceles triangular structure, with a bearing rod 301 welded vertically to its base. An L-shaped pin groove is provided at the end of the bearing rod 301 away from the wear-resistant tooth tip 3. This L-shaped pin groove is adapted to the connecting rod 102 to achieve initial fixation. Specifically, the L-shaped pin groove includes an axial guide section and a circumferential locking section. The axial guide section is a rectangular groove opened along the axis of the bearing rod 301, and its width is 2-3 mm larger than the diameter of the connecting rod 102 to facilitate the axial insertion of the connecting rod 102. The circumferential locking section is located at the bottom of the axial guide section and is opened by rotating 90° clockwise around the axis of the bearing rod 301. Its inner diameter is equal to the diameter of the connecting rod 102. When the bearing rod 301 is fitted into the connecting rod 102 along the axial guide section, rotating the wear-resistant tooth tip 390° will cause the connecting rod 102 to be locked into the circumferential locking section, achieving radial limitation.

[0015] To ensure the wear-resistant tooth tip 3 is firmly fixed to the connecting arm 1, a positioning block 302 is fixedly installed at the bottom of the wear-resistant tooth tip 3. The positioning block 302 is an annular structure coaxial with the bearing rod 301. Its outer diameter is adapted to the inner diameter of the annular groove 104 opened at the lower end of the gripper 2 and the connecting arm 1. The annular groove 104 is formed by splicing the groove at the end of the gripper 2 and the groove at the lower end of the connecting arm 1. The two are connected and the inner wall is smooth. Threaded through holes 105 are opened through both sides of the lower end of the gripper 2. The threaded through holes 105 are connected to the annular groove 104. A threaded groove 303 is opened on the positioning block 302 at the position corresponding to the threaded through hole 105. When the positioning block 302 is embedded in the annular groove 104, the positioning screw 106 is screwed into the threaded through hole 105 and screwed into the threaded groove 303 to achieve circumferential fixation of the wear-resistant tooth tip 3 and prevent rotation during operation.

[0016] The assembly process of this embodiment is as follows: First, fix the gripper 2 on the inner arc surface of the connecting arm 1, so that the extension of the gripper 2 rests on the bracket 107 and is tightened; then, insert the bearing rod 301 of the wear-resistant tooth tip 3 into the connecting rod 102 along the axial guide section, rotate 90° so that the connecting rod 102 is engaged in the circumferential locking section, at which time the positioning block 302 is embedded in the annular groove 104; finally, screw the positioning screw 106 into the threaded through hole 105 and the threaded groove 303 to complete the assembly. During disassembly, simply unscrew the positioning screw 106, rotate the wear-resistant tooth tip 390° in the opposite direction, and the wear-resistant tooth tip 3 can be removed along the axial guide section. The operation is convenient and avoids the disassembly difficulties of traditional structures.

[0017] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A wear-resistant, high-strength excavator claw sleeve with detachable tooth tips, comprising a connecting arm (1), wherein the connecting arm (1) is a hollow curved beam, and a claw flap (2) is fixedly provided on its inner arc surface; the upper part of the connecting arm (1) is provided with a hinge part connected to the grab bucket body, and the lower end is provided with wear-resistant tooth tips (3), characterized in that: The lower end of the connecting arm (1) is provided with a connecting rod (102). The two ends of the connecting rod (102) are fixedly connected to the inner wall of the connecting arm (1). The wear-resistant tooth tip (3) is an isosceles triangle with a bearing rod (301) on its base. One end of the bearing rod (301) is perpendicularly connected to the wear-resistant tooth tip (3), and the other end is provided with a positioning mechanism and an L-shaped pin groove. The L-shaped pin groove cooperates with the connecting rod (102). The positioning mechanism keeps the wear-resistant tooth tip (3) and the connecting arm (1) fixed.

2. The wear-resistant, high-strength excavator claw sleeve with detachable tooth tips according to claim 1, characterized in that: The L-shaped pin groove includes an axial guide section and a circumferential locking section. The axial guide section is a rectangular groove opened along the axis of the bearing rod (301), and its width is slightly larger than the diameter of the connecting rod (102). The circumferential locking section is located at the bottom of the axial guide section and is an arc-shaped groove opened by rotating 90° around the axis of the bearing rod (301), and its inner diameter is equal to the diameter of the connecting rod (102).

3. The wear-resistant, high-strength excavator claw sleeve with detachable tooth tips according to claim 1, characterized in that: The positioning mechanism includes a positioning block (302) disposed at the bottom of the wear-resistant tooth tip (3). The positioning block (302) is annular and coaxial with the bearing rod (301). The gripper (2) is aligned with the lower end of the connecting arm (1), and both are provided with a communicating annular groove (104). The annular groove (104) cooperates with the positioning block (302). The lower ends of the gripper (2) are provided with threaded through holes (105) penetrating the annular groove (104). The positioning block (302) is provided with a threaded groove (303) directly opposite to the threaded through hole (105). A positioning screw (106) is provided in the threaded through hole (105) and is threadedly engaged with it.

4. A wear-resistant, high-strength excavator claw sleeve with detachable tooth tips according to claim 2 or 3, characterized in that: The side of the grab petal (2) extends to both sides, and the two sides of the connecting arm (1) are provided with brackets (107) to support the extension of the grab petal (2).

5. The wear-resistant, high-strength excavator claw sleeve with detachable tooth tips according to claim 4, characterized in that: The hinge includes a connecting bushing (108) and a rotating bushing (109), wherein the connecting bushing (108) is disposed at the top end of the connecting arm (1) and connected to the grab body, and the rotating bushing (109) is connected to the piston rod of the grab cylinder.

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