Sealing structure of uterine cavity planing handle

Abstract

The utility model relates to the technical field of medical instruments, in particular to a sealing structure of a uterine cavity planing handle. A bearing seat; and the sealing piece is arranged between the bottom surface of the sealing seat and the bottom surface of the bearing seat, and an axially sunken annular groove is formed in the surface of the sealing piece. The sealing seat is fixedly connected with the inner wall of the shell, and the wall surface of the bearing seat is fixedly connected with the inner side of the wall surface of the sealing seat, so that non-rotating parts can be sealed without a sealing ring, and accessories and mounting procedures are reduced; the annular groove is formed in the sealing piece and used for storing lubricating oil to improve the lubricating effect of the main shaft, sealing is not affected, meanwhile, the structures of the sealing seat and the bearing seat are simplified, and the manufacturing difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a sealing structure for a uterine shaving handle. Background Technology

[0002] The hysteroscopic shaving handle is widely used in surgical procedures involving the removal of tissues in the ear, nose, throat, head and neck, joints, and spine. It utilizes high-speed drilling, shaving, and grinding techniques to remove diseased tissues and create surgical access. The shaving handle, such as... Figure 1 As shown, the device includes a housing, a spindle assembly housed inside the housing, and a motor. The motor is powered by the spindle assembly, which is rotatably connected to the housing via a sealed structure. During operation, the motor drives the spindle assembly to rotate, which in turn drives the grippers to rotate the tool inserted with it, thus performing the tissue removal operation. Furthermore, to remove waste fluids such as residual material, tissue fluid, blood, and saline solution after removal, a suction system is installed on the planer handle. This suction system is typically separated from the motor by a sealed structure to prevent the motor from being corroded by saline solution or other contaminants, which could lead to motor malfunction or damage.

[0003] However, in existing technologies, such as the "Surgical Power Planer Handle" disclosed in Chinese patent literature (publication number CN219763487U), the sealing structure includes multiple sealing rings and is very complex, leading to cumbersome installation processes. Furthermore, since the sealing structure and the spindle are rotary sealed, lubricating oil needs to be placed within the sealing structure. Existing sealing structures either lack a lubricating oil storage structure or require grooves outside the sealing rings to store the lubricating oil, further complicating the sealing structure. Utility Model Content

[0004] The purpose of this utility model is to solve the problem of complex sealing structure of existing uterine planer handles, and to provide a simple and convenient sealing structure for storing lubricating oil and installation.

[0005] The technical solution provided by this utility model is as follows: A sealing structure for a uterine cavity planing handle, disposed inside the handle housing and used to seal the rotation of the main shaft inside the uterine cavity planing handle, comprising:

[0006] The sealing seat is cap-shaped and includes a bottom surface and a wall surface. The bottom surface is rotatably connected to the main shaft, and the wall surface is fixedly connected to the inner wall of the handle housing.

[0007] The bearing housing is cap-shaped and includes a bottom surface and a wall surface. The bottom surface is rotatably connected to the main shaft, and the wall surface is fixedly connected to the inner side of the sealing seat wall.

[0008] A sealing element is sleeved on the outside of the main shaft and disposed between the bottom surface of the sealing seat and the bottom surface of the bearing seat. The outer periphery of the sealing element is interference-fitted with the wall surface of the sealing seat. The sealing element, the bottom surface of the sealing seat, and the bottom surface of the bearing seat are axially interference-fitted. The sealing element has an axially recessed annular groove on one side surface facing the bottom surface of the sealing seat and the other side surface facing the bottom surface of the bearing seat.

[0009] The sealing seat is fixedly connected to the inner wall of the housing, and the bearing seat wall is fixedly connected to the inner side of the sealing seat wall, so that sealing can be achieved between non-rotating parts without the need for a sealing ring, reducing accessories and installation steps; the sealing element is set between the bottom surface of the sealing seat and the bottom surface of the bearing seat to ensure the sealing around the spindle, and the structure is simple; the sealing element is provided with an annular groove to store lubricating oil to increase the lubrication effect of the spindle, which simplifies the structure of the sealing seat and bearing seat without affecting the sealing, and reduces the manufacturing difficulty.

[0010] Preferably, the outer periphery of the seal is provided with several radially protruding annular protrusions, which improve the sealing effect between the outer periphery of the seal and the wall surface of the sealing seat.

[0011] Preferably, the different annular protrusions have the same diameter and are axially arranged on the outer periphery of the seal. Multiple annular protrusions arranged axially further improve the sealing effect.

[0012] Preferably, the annular groove has several rings, with different annular grooves radially distributed on one side of the seal facing the bottom surface of the bearing housing and / or on the other side facing the bottom surface of the seal housing. Providing multiple rings of annular grooves ensures oil storage while increasing the strength of the seal and enhancing its sealing performance.

[0013] Preferably, the wall surface is provided with a first annular stepped surface facing the bearing seat, the portion of the sealing seat wall surface located between the first annular stepped surface and the bottom surface of the sealing seat is interference-fitted with the sealing element, and the portion of the sealing seat wall surface located between the first annular stepped surface and the bottom surface of the bearing seat is fixedly connected to the outer side of the bearing seat wall surface.

[0014] The first annular step surface is designed such that the diameter of the portion of the sealing seat wall between the first annular step surface and the bottom surface of the sealing seat is smaller than that between the first annular step surface and the bottom surface of the bearing seat, making the installation of the seal more convenient and reducing the volume of the seal.

[0015] Preferably, the inner side of the bearing housing wall and the sealing housing wall are fixedly connected by welding.

[0016] Preferably, the sealing seat wall is fixedly connected to the inner wall of the handle housing by welding.

[0017] Preferably, the outer side of the sealing seat wall is provided with a second annular stepped surface, which cooperates with the inner wall of the handle housing to play a positioning role.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The sealing seat is fixedly connected to the inner wall of the housing, and the bearing seat wall is fixedly connected to the inner side of the sealing seat wall, so that sealing can be completed between non-rotating parts without the need for sealing rings, reducing accessories and installation procedures.

[0020] The sealing element is placed between the bottom surface of the sealing seat and the bottom surface of the bearing seat to ensure the seal around the spindle, which is a simple structure.

[0021] The seal has an annular groove to store lubricating oil, which increases the lubrication effect of the spindle. This simplifies the structure of the seal seat and bearing seat without affecting the seal, and reduces the manufacturing difficulty. Attached Figure Description

[0022] Figure 1 A three-dimensional schematic diagram of the appearance of a uterine planer handle;

[0023] Figure 2 This is a cross-sectional schematic diagram of Embodiment 1 of the present utility model;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 This is a three-dimensional schematic diagram of the sealing element 5 according to Embodiment 1 of this utility model;

[0026] Figure 5 This is a three-dimensional schematic diagram of the sealing seat 3 according to Embodiment 1 of this utility model;

[0027] Figure 6 This is a three-dimensional schematic diagram of the sealing seat 3 from another perspective of Embodiment 1 of this utility model.

[0028] Explanation of reference numerals in the attached drawings: 1. Handle housing; 2. Main shaft; 3. Sealing seat; 31. Sealing seat bottom surface; 32. Sealing seat wall surface; 33. First annular step surface; 34. Second annular step surface; 4. Bearing seat; 41. Bearing seat bottom surface; 42. Bearing seat wall surface; 5. Seal; 51. Annular protrusion; 52. Annular groove; 6. Bearing. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0030] For ease of explanation, when the main shaft 2 is vertically distributed, the seal 5 is located on the lower side in the direction of the seal seat 3.

[0031] Example 1, as Figures 1-6 As shown, a sealing structure for a uterine cavity shaving handle is disposed within the handle housing 1 and used to seal the rotation of the main shaft 2 within the uterine cavity shaving handle, comprising:

[0032] Sealing seat 3, such as Figure 4 and Figure 5 The aforementioned structure is cap-shaped and includes a sealing seat bottom surface 31 and a sealing seat wall surface 32. The sealing seat bottom surface 31 is rotatably connected to the main shaft 2, and the sealing seat wall surface 32 is fixedly connected to the inner wall of the handle housing 1.

[0033] The bearing housing 4 is cap-shaped and has a bearing 6 installed inside. It includes a bearing housing bottom surface 41 and a bearing housing wall surface 42. The bearing housing bottom surface 41 is rotatably connected to the main shaft 2, and the bearing housing wall surface 42 is fixedly connected to the inner side of the sealing seat wall surface 32.

[0034] Seal 5, such as Figure 4 As shown, the seal 5 is sleeved on the outside of the main shaft 2 and is positioned between the bottom surface 31 of the sealing seat and the bottom surface 41 of the bearing seat. The outer periphery of the seal 5 is press-fitted with the wall surface 32 of the sealing seat. The seal 5 is press-fitted axially with the bottom surface 31 of the sealing seat and the bottom surface 41 of the bearing seat. The seal 5 has an axially recessed annular groove 52 on the side surface facing the bottom surface 31 of the sealing seat and the side surface facing the bottom surface 41 of the bearing seat.

[0035] like Figure 2 As shown, a sealing structure is installed inside the handle, with a suction system mounted on top and a motor mounted below. The sealing structure prevents liquid from the suction system from leaking into the motor and causing damage.

[0036] The sealing seat 3 is fixedly connected to the inner wall of the handle housing 1, and the bearing seat wall 42 is fixedly connected to the inner side of the sealing seat wall 32, so that sealing can be completed between non-rotating parts without the need for sealing rings, reducing accessories and installation procedures; the sealing element 5 is set between the bottom surface 31 of the sealing seat and the bottom surface 41 of the bearing seat to ensure the sealing around the spindle 2, and the structure is simple; the sealing element 5 is provided with an annular groove 52 to store lubricating oil to increase the lubrication effect of the spindle 2, which simplifies the structure of the sealing seat 3 and the bearing seat 4 without affecting the sealing, and reduces the manufacturing difficulty.

[0037] The outer periphery of the seal 5 is provided with several radially raised annular protrusions 51. In this embodiment, three rings are provided: upper, middle and lower. The annular protrusions 51 improve the sealing effect between the outer periphery of the seal 5 and the wall surface 32 of the sealing seat.

[0038] Different annular protrusions 51 have the same diameter and are arranged axially on the outer periphery of the seal 5. The multiple annular protrusions 51 arranged axially further improve the sealing effect.

[0039] The annular groove 52 has several rings, and different annular grooves 52 are radially distributed on the side surface of the seal 5 facing the bottom surface 41 of the bearing seat and / or the side surface facing the bottom surface 31 of the seal seat. In this embodiment, one ring is provided at the top and one at the bottom, but multiple rings can also be provided as needed. Providing multiple rings of annular grooves 52 can improve the strength of the seal 5 and enhance the sealing performance while ensuring the oil storage function.

[0040] The inner side of the sealing seat wall 32 is provided with a first annular stepped surface 33 facing the bearing seat 4. The portion of the sealing seat wall 32 located between the first annular stepped surface 33 and the bottom surface 31 of the sealing seat is interference-fitted with the sealing element 5. The portion of the sealing seat wall 32 located between the first annular stepped surface 33 and the bottom surface 41 of the bearing seat is fixedly connected to the outer side of the bearing seat wall 42.

[0041] The first annular step surface 33 is provided such that the diameter of the portion of the sealing seat wall surface 32 located between the first annular step surface 33 and the bottom surface 31 of the sealing seat is smaller than that of the portion located between the first annular step surface 33 and the bottom surface 41 of the bearing seat, which makes the installation of the seal 5 more convenient and reduces the volume of the seal 5.

[0042] The inner side of the bearing housing wall 42 and the sealing housing wall 32 are fixedly connected by welding. The sealing housing wall 32 and the inner wall of the handle housing 1 are fixedly connected by welding. Welding improves the sealing effect, reduces the use of sealing rings, and reduces installation steps.

[0043] The outer side of the sealing seat wall 32 is provided with a second annular stepped surface 34, which cooperates with the inner wall of the handle housing 1 to play a positioning role. At the same time, a sleeve can be provided on the inner wall of the handle housing 1 to be fixedly connected to the sealing seat 3, which facilitates installation.

[0044] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

Claims

1. A sealing structure for a uterine cavity shaving handle, disposed within a handle housing (1) and used to seal the rotation of the main shaft (2) within the uterine cavity shaving handle, characterized in that, include: The sealing seat (3) is in the shape of a cover and includes a bottom surface (31) and a wall surface (32). The bottom surface (31) of the sealing seat is rotatably connected to the main shaft (2), and the wall surface (32) of the sealing seat is fixedly connected to the inner wall of the handle housing (1). The bearing housing (4) is in the shape of a cover and includes a bearing housing bottom surface (41) and a bearing housing wall surface (42). The bearing housing bottom surface (41) is rotatably connected to the main shaft (2), and the bearing housing wall surface (42) is fixedly connected to the inner side of the sealing seat wall surface (32). A sealing element (5) is sleeved on the outside of the main shaft (2) and disposed between the bottom surface (31) of the sealing seat and the bottom surface (41) of the bearing seat. The outer periphery of the sealing element (5) is press-fitted with the wall surface (32) of the sealing seat. The sealing element (5) is press-fitted with the bottom surface (31) of the sealing seat and the bottom surface (41) of the bearing seat in the axial direction. The sealing element (5) has an axially recessed annular groove (52) on the side surface of the sealing element (5) facing the bottom surface (31) of the sealing seat and on the side surface of the bearing seat (41).

2. The sealing structure of the uterine cavity planing handle according to claim 1, characterized in that, The outer periphery of the seal (5) is provided with several radially protruding annular protrusions (51).

3. The sealing structure of the uterine cavity planing handle according to claim 2, characterized in that, The different annular protrusions (51) have the same diameter and are axially arranged on the outer periphery of the seal (5).

4. The sealing structure of the uterine cavity planing handle according to any one of claims 1-3, characterized in that, The annular groove (52) is provided in several rings, and different annular grooves (52) are radially distributed on one side surface of the seal (5) facing the bottom surface (41) of the bearing seat and / or on one side surface facing the bottom surface (31) of the seal seat.

5. The sealing structure of the uterine cavity planing handle according to any one of claims 1-3, characterized in that, The inner side of the sealing seat wall (32) is provided with a first annular step surface (33) facing the bearing seat (4). The portion of the sealing seat wall (32) between the first annular step surface (33) and the bottom surface (31) of the sealing seat is press-fitted with the sealing element (5). The portion of the sealing seat wall (32) between the first annular step surface (33) and the bottom surface (41) of the bearing seat is fixedly connected to the outer side of the bearing seat wall (42).

6. The sealing structure of the uterine cavity planing handle according to any one of claims 1-3, characterized in that, The inner side of the bearing seat wall (42) and the sealing seat wall (32) are fixedly connected by welding.

7. The sealing structure of the uterine cavity planing handle according to any one of claims 1-3, characterized in that, The sealing seat wall (32) is fixedly connected to the inner wall of the handle housing (1) by welding.

8. The sealing structure of the uterine cavity planing handle according to any one of claims 1-3, characterized in that, The outer side of the sealing seat wall (32) is provided with a second annular stepped surface (34).

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