Grinding filing rod connecting structure

Abstract

The utility model discloses a grinding and filing rod connecting structure which comprises a support, a grinding and filing rod is arranged in the support in a penetrating mode in the axial direction, a shaft sleeve is arranged outside the grinding and filing rod in a sleeved mode, and the outer wall of the shaft sleeve is connected with the inner wall of the support through a bearing. The shaft sleeve arranged synchronously with the file grinding rod is adopted, the shaft sleeve is connected with the support through the bearing, when the file grinding rod rotates, the shaft sleeve synchronously rotates along with the file grinding rod, and even if the file grinding rod shifts and shakes due to axial force, rotating friction does not occur between the file grinding rod and the shaft sleeve. Therefore, heating and abrasion in the working process are greatly reduced, meanwhile, the bearing is arranged to be an angular contact bearing, good rotating performance is achieved, and the axial acting force of the filing rod can be effectively borne.

Description

Technical Field

[0001] The utility model belongs to the field of medical equipment and relates to a file rod connection structure. Background Art

[0002] In existing orthopedic navigation surgery for hip joint rasping, a rasping device consisting of a rasping rod, a rasping head, a bracket, a bone drill, a robotic arm, etc. has been publicly used.

[0003] Based on the structure disclosed in a hip joint filing device according to Chinese invention patent CN117653262A, a mechanical arm, a filing rod, a filing head, a bone drill and a support seat are included. Among them, for the structure between the filing rod, the first sleeve and the fixed sleeve disclosed therein, the filing rod will have a relative rotation relationship with the first sleeve during use. In the subsequent practical application of the above structure, there are further usage problems. Specifically, since the filing rod will be subjected to axial force during the filing work, the filing rod will move and shake in directions other than the axial direction, which will cause the rotating filing rod to frequently collide and rub against the inner wall of the sleeve, thereby generating heat and wear. After long-term use, it is also found that the filing rod and the sleeve are adhered. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a file rod connection structure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A file rod connection structure comprises a bracket, wherein the file rod is axially inserted into the bracket, a shaft sleeve is arranged outside the file rod, and an outer wall of the shaft sleeve is connected to an inner wall of the bracket through a bearing.

[0007] Furthermore, the bearing is an angular contact bearing.

[0008] Furthermore, the shaft sleeve is fixedly connected to the grinding rod.

[0009] In summary, the utility model is beneficial in that:

[0010] The utility model adopts a shaft sleeve which is synchronously arranged with the grinding file rod, and the connection between the shaft sleeve and the bracket is realized by a bearing. When the grinding file rod rotates, the shaft sleeve rotates synchronously with the grinding file rod. Even if the grinding file rod moves and shakes due to axial force, no rotational friction occurs between the grinding file rod and the shaft sleeve. Therefore, the heat and wear during the working process are greatly reduced. At the same time, the bearing is arranged as an angular contact bearing, which not only has good rotation performance, but also can effectively withstand the axial force of the grinding file rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the grinding file rod and the bracket in the utility model.

[0012] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure inside the middle bracket.

[0013] Markings in the figure: 1. bracket; 2. grinding rod; 3. sleeve; 4. angular contact bearing. DETAILED DESCRIPTION

[0014] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0015] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0016] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0017] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the vertical relationship may actually be an approximately vertical relationship.

[0018] The utility model provides a grinding file rod connection structure for connecting the grinding file rod 2 and the robot mechanical arm. Figure 1 , including a bracket 1 connected to the end of the robotic arm, the grinding and rasp rod 2 is installed on the bracket 1, the front end of the grinding and rasp rod 2 is provided with a grinding and rasp head, and the rear end is provided with a bone drill. The bracket 1 serves as a support for the grinding and rasp rod 2, and the grinding and rasp rod 2 can rotate relative to the bracket 1. The rotation driving force is provided by the bone drill to realize the grinding and rasp work in the acetabular grinding and rasp surgery.

[0019] Specifically, refer to Figure 2The bracket 1 is a hollow cylindrical structure, the grinding file rod 2 is inserted into the bracket 1 along the axial direction of the bracket 1, and the outer periphery of the grinding file rod 2 is coaxially provided with a shaft sleeve 3 for limiting the axial position of the grinding file rod 2 so that the grinding file rod 2 will not deviate when rotating along the axis.

[0020] In the existing structure using the bracket 1 and the sleeve 3, the sleeve 3 and the bracket 1 are fixedly connected by bolts, and the grinding rod 2 and the sleeve 3 rotate relative to each other. Since the front end of the grinding rod 2 has a propulsion effect during the grinding work, it will be subjected to an axial force. This force will cause the rotating grinding rod 2 to move and shake in directions other than the axial direction, and the movement and shaking amplitude will be amplified due to the rotation of the grinding rod 2 itself, resulting in frequent collision and friction contact between the outer periphery of the grinding rod 2 and the inner periphery of the sleeve 3, thereby generating heat and wear that will increase over time. For some special materials, such as when the grinding rod 2 and the sleeve 3 are made of polymer materials, long-term friction, heat and wear will cause the two to adhere to each other.

[0021] In order to solve the above problem, the present embodiment cancels the fixation of the shaft sleeve 3 and the bracket 1, and a bearing is provided on the outer periphery of the shaft sleeve 3. The outer periphery of the bearing is fixedly matched with the inner circumferential wall of the bracket 1, so that the shaft sleeve 3 can rotate relative to the bracket 1 through the bearing. The shaft sleeve 3 is fixedly connected to the grinding file rod 2, so that when the grinding file rod 2 rotates, the shaft sleeve 3 is driven to rotate synchronously, thereby avoiding the relative rotation friction between the shaft sleeve 3 and the grinding file rod 2.

[0022] Furthermore, the bearing adopts an angular contact bearing 4, which can also be used to withstand the axial force applied to the filing rod 2 during filing operation, thereby ensuring the stability of the structure.

[0023] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A file rod connection structure, characterized in that: It comprises a support (1), a grinding rod (2) axially inserted into the support (1), a shaft sleeve (3) is provided on the outer shell of the grinding rod (2), and the outer wall of the shaft sleeve (3) is connected to the inner wall of the support (1) via a bearing.

2. A file rod connection structure according to claim 1, characterized in that: The bearing is an angular contact bearing (4).

3. A rasp rod connection structure according to claim 1, characterized in that: The shaft sleeve (3) is fixedly connected to the grinding rod (2).

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