A new type of metal knurled steel shaft

Abstract

This utility model relates to a novel knurled steel shaft in the field of transmission hardware technology. It includes a shaft section and a joint section. The surface of the shaft section has a knurled structure, and the joint section houses a rotatable ball bearing. The joint section is composed of a right assembly block and a left assembly block, which are separate and axially symmetrical. The lower center of the right and left assembly blocks, when joined together, forms an assembly hole to accommodate the ball bearing. One end of each right and left assembly block is fixedly connected to the shaft section. A fixing element is provided at the end of each right and left assembly block away from the shaft section, and the right and left assembly blocks are fixedly connected by this fixing element. The ball bearing can be assembled into the assembly hole without the need for external pressure. This structure is simple to assemble, requires no external force, minimizes damage to the ball bearing, and is structurally stable.

Description

Technical Field

[0001] This utility model relates to the field of transmission hardware technology, and in particular to a new type of metal knurled steel shaft. Background Technology

[0002] A knurled spherical plain bearing is a connecting shaft with spherical sliding bearings at its ends. Its sliding contact surfaces are an inner spherical surface and an outer spherical surface, allowing it to rotate and oscillate at any angle during movement. It is manufactured using various special processes such as surface phosphating, burring, padding, and spraying. A radial spherical plain bearing is a type of spherical plain bearing, typically consisting of an inner ring and an outer ring, with the inner ring installed inside the outer ring. Radial spherical plain bearings are characterized by high load capacity, impact resistance, corrosion resistance, wear resistance, and good lubrication, and are widely used in industrial production. Connecting the outer ring of a radial spherical plain bearing to the shaft end yields a knurled spherical plain bearing shaft.

[0003] Currently, installing the inner ring of a radial spherical plain bearing or shaft end bearing into the outer ring typically requires a press. In the absence of a press, a fitting tube and a small hammer can be used. Disassembling the inner ring usually involves tapping it with a small hammer. While these methods achieve the installation and removal of the inner ring, the need for a press during installation and manual tapping during removal makes the process cumbersome. Therefore, there is an urgent need to develop a new type of knurled steel shaft to meet practical application requirements. Utility Model Content

[0004] The purpose of this invention is to provide a new type of knurled steel shaft to solve the above-mentioned defects.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A novel knurled steel shaft includes a shaft section and a joint section. The surface of the shaft section is provided with a knurled structure, and the joint section contains a rotatable ball bearing. The joint section is composed of a right assembly block and a left assembly block, which are separate structures with an axisymmetric structure. The lower center of the right and left assembly blocks can be spliced ​​together to form an assembly hole for accommodating the ball bearing. The ball bearing is rotatably embedded in the assembly hole. One end of each right and left assembly block is fixedly connected to the shaft section, and the end of each right and left assembly block away from the shaft section is provided with a fixing member. The right and left assembly blocks are fixedly connected by the fixing member.

[0007] In the above description, as a further solution, a mounting hole is provided on the end face of the shaft near the shaft. The inside of the mounting hole has an internal thread structure. Both the right and left assembly blocks have radially protruding mounting protrusions at one end near the shaft. The surface of the mounting protrusions has an external thread structure. When the right and left assembly blocks are spliced ​​together, the two mounting protrusions can form a columnar structure that matches the mounting hole. The right and left assembly blocks are threadedly fixed to the mounting hole through the mounting protrusions.

[0008] In the above description, as a further solution, the fastener is composed of a fixing bolt. The right assembly block and the left assembly block have threaded holes at the ends away from the shaft. The fixing bolt is threaded to the threaded holes at the ends of the right assembly block and the left assembly block.

[0009] In the above description, as a further solution, both the inner walls of the right assembly block and the left assembly block are provided with movable arc grooves, and the surface of the ball bearing can be slidably attached to the movable arc grooves.

[0010] As a further embodiment, the ball bearing has a insertion hole in the middle. The insertion hole is a cylindrical structure, and the axis of the insertion hole coincides with the axis of the mounting hole.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: by adopting a split structure for the joint, the joint is divided into a symmetrical right assembly block and a left assembly block along the axis. The ball bearing can be placed in the assembly block on one side in advance during assembly. Then, by splicing the right assembly block and the left assembly block together, an assembly hole for accommodating the ball bearing can be formed in the lower middle. This allows the ball bearing to be assembled into the assembly hole without the need for external equipment to apply pressure. This structure is simple to assemble and can be completed without applying external force, resulting in less damage to the ball bearing and a stable structure. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of a novel knurled steel shaft described in this embodiment;

[0013] Figure 2 This is an exploded view of the structure of a novel knurled steel shaft described in this embodiment;

[0014] In the figure: 1-shaft section, 11-mounting hole, 12-knurling, 2-joint section, 21-right assembly block, 22-left assembly block, 23-assembly hole, 231-movable arc groove, 24-mounting protrusion, 25-threaded hole, 3-ball bearing, 31-insertion hole, 4-fixed component. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] For this embodiment, please refer to Figures 1-2 The present invention relates to a novel knurled 12 steel shaft, comprising a shaft portion 1 and a joint portion 2. The joint portion 2 is provided with a rotatable ball bearing 3. The joint portion 2 is composed of a right assembly block 21 and a left assembly block 22. The right assembly block 21 and the left assembly block 22 are a split structure and are axially symmetrical. The lower middle part of the right assembly block 21 and the left assembly block 22 can form an assembly hole 23 for accommodating the ball bearing 3. The ball bearing 3 is rotatably embedded in the interior of the assembly hole 23. The inner walls of the right assembly block 21 and the left assembly block 22 are provided with movable arc grooves 231. The surface of the ball bearing 3 is slidably attached to the movable arc grooves 231. The middle part of the ball bearing 3 is provided with a insertion hole 31. The insertion hole 31 is a columnar structure, and the axis of the insertion hole 31 is coincident with the axis of the mounting hole 11.

[0017] One end of the right assembly block 21 and the left assembly block 22 are fixedly connected to the shaft part 1. The right assembly block 21 and the left assembly block 22 are provided with a fixing member 4 at the end away from the shaft. The right assembly block 21 and the left assembly block 22 are fixedly connected by the fixing member 4.

[0018] By adopting a split structure for the joint 2, the joint 2 is divided into a symmetrical right assembly block 21 and a left assembly block 22 along the axis. The ball bearing 3 can be placed in one of the assembly blocks in advance during assembly. The lower middle part of the right assembly block 21 and the left assembly block 22 can be spliced ​​together to form an assembly hole 23 to accommodate the ball bearing 3. This allows the ball bearing 3 to be assembled into the assembly hole 23 without the need for external equipment to apply pressure. This structure is simple to assemble and can be completed without applying external force, resulting in less damage to the ball bearing 3 and a stable structure.

[0019] Preferably, the shaft portion 1 has a mounting hole 11 on its end face near the shaft portion 1. The mounting hole 11 has an internal thread structure. The right assembly block 21 and the left assembly block 22 each have a radially protruding mounting protrusion 24 at one end near the shaft portion 1. The surface of the mounting protrusion 24 has an external thread structure. When the right assembly block 21 and the left assembly block 22 are spliced ​​together, the two mounting protrusions 24 can form a columnar structure that matches the mounting hole 11. The right assembly block 21 and the left assembly block 22 are threadedly fixed to the mounting hole 11 through the mounting protrusion 24.

[0020] By splicing the right assembly block 21 and the left assembly block 22 together, the two mounting protrusions 24 can form a columnar structure that matches the mounting hole 11. The installation method of fixing the right assembly block 21 and the left assembly block 22 with the mounting hole 11 can limit the right assembly block 21 and the left assembly block 22 in the horizontal and vertical directions, so as to maintain a stable connection structure with the shaft part 1. At the same time, it can make the right assembly block 21 and the left assembly block 22 firmly engaged together.

[0021] Meanwhile, the fastener 4 is made of a fixing bolt. The right assembly block 21 and the left assembly block 22 are both provided with threaded holes 25 at the ends away from the shaft. The fixing bolt is threaded to the threaded holes 25 at the ends of the right assembly block 21 and the left assembly block 22, so that the right assembly block 21 and the left assembly block 22 can be firmly engaged together.

[0022] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A novel knurled steel shaft, comprising a shaft section and a joint section, wherein the surface of the shaft section is provided with a knurled structure, and the joint section is provided with a rotatable ball bearing, characterized in that: The joint is composed of a right assembly block and a left assembly block. The right assembly block and the left assembly block are separate structures and are axially symmetrical. When the right assembly block and the left assembly block are spliced ​​together, an assembly hole for accommodating a ball bearing can be formed in the middle. The ball bearing is rotatably embedded in the assembly hole. One end of the right assembly block and the left assembly block are fixedly connected to the shaft. The end of the right assembly block and the left assembly block away from the shaft is provided with a fixing member. The right assembly block and the left assembly block are fixedly connected by the fixing member.

2. The novel knurled steel shaft according to claim 1, characterized in that: The shaft portion has a mounting hole on its end face near the shaft portion. The mounting hole has an internal thread structure. Both the right and left assembly blocks have radially protruding mounting protrusions at their ends near the shaft portion. The surfaces of the mounting protrusions have external threads. When the right and left assembly blocks are spliced ​​together, the two mounting protrusions can form a columnar structure that matches the mounting hole. The right and left assembly blocks are then threadedly fixed to the mounting hole through the mounting protrusions.

3. The novel knurled steel shaft according to claim 1, characterized in that: The fastener is composed of a fixing bolt. The right assembly block and the left assembly block have threaded holes at their ends away from the shaft. The fixing bolt is threadedly fixed to the threaded holes at the ends of the right assembly block and the left assembly block.

4. A novel knurled steel shaft according to claim 1, characterized in that: The inner walls of both the right and left assembly blocks are provided with movable arc grooves, and the surface of the spherical bearing can be slidably attached to the movable arc grooves.

5. A novel knurled steel shaft according to any one of claims 1-4, characterized in that: The ball bearing has a insertion hole in the middle. The insertion hole has a cylindrical structure, and the axis of the insertion hole coincides with the axis of the mounting hole.

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