Double-sealing structure of spine grinding drill bit

Abstract

The utility model provides a spine grinding drill bit double-sealing structure, which belongs to the technical field of medical instruments and comprises a supporting cylinder and a knife tube body, a rubber ring is arranged in the supporting cylinder, a sealing ring, a baffle ring I and an elastic table I are arranged on one side of the rubber ring, the sealing ring is connected with a positioning ring, and a fixing ring, a baffle ring II and an elastic table II are arranged on the other side of the rubber ring. A transition sleeve is arranged at one end of the supporting cylinder, a bearing, a bearing sleeve, a clamping ring and a butt-joint plate are arranged on one side of the transition sleeve, the bearing is connected with a sealing ring, and a sealing piece is arranged on the inner side of the butt-joint plate. The utility model has beneficial effects. The sealing effect is improved through a sealing ring, meanwhile, through mutual extrusion of a second elastic table and a first elastic table, a rubber ring is in interference fit with the inner wall of a mounting groove, then the sealing effect of the inner wall of a supporting barrel is guaranteed, meanwhile, vibration generated by a grinding drill bit can be absorbed, and the vibration effect is reduced; in addition, the sealing element and the sealing ring can further improve the sealing effect so as to guarantee the waterproof performance of the cutter.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a double sealing structure of a spinal grinding drill bit. Background Art

[0002] Minimally invasive spinal drill bits are commonly used tools for minimally invasive orthopedic surgery. They include an inner knife tube, an outer knife tube, and a drill bit. The inner knife tube is sheathed in the outer knife tube, and the front end of the inner knife tube is connected to the drill bit and extends out of the front end of the outer knife tube. The minimally invasive spinal drill bit is connected to the handle, and is connected to the handle through the handle. The power provided by the handle drives the inner knife tube to rotate, and then drives the drill bit connected to the inner knife tube to rotate at high speed to grind the tissue.

[0003] In the prior art, when a minimally invasive spinal drill bit is working, its rotation speed is as high as 25,000 rpm. During its high-speed movement, due to the gap between the drill bit and the knife tube, and the drill bit is located in the patient's lesion tissue area, the pressure in this area is higher than the atmospheric pressure, resulting in blood, saline and other liquids during the operation entering the gap between the knife tube and the handle through the gap between the drill bit and the knife tube, and then seeping into the handle, causing handle failure; however, most of the existing sealing structures are single seals, and the sealing structure can easily fail when the knife head is under high pressure, thereby greatly reducing the waterproof performance of the tool; how to invent a method to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a double sealing structure for a spinal drill bit, aiming to improve the existing sealing structure which is mostly a single seal. When the cutter head is under high pressure, the sealing structure is easily invalidated, thereby greatly reducing the waterproof performance of the cutter.

[0005] The utility model is achieved in this way:

[0006] The utility model provides a double-sealing structure of a spinal drill bit, comprising a support tube and a tool tube body, a rubber ring is arranged inside the support tube, a sealing ring, a retaining ring and an elastic platform are arranged on one side of the rubber ring, the sealing ring is connected with a positioning ring, a fixing ring, a retaining ring and a second elastic platform are arranged on the other side of the rubber ring, a transition sleeve is arranged at one end of the support tube, a bearing, a bearing sleeve, a clamping ring and a docking plate are arranged on one side of the transition sleeve, the bearing is connected with a sealing ring, and a sealing member is arranged on the inner side of the docking plate.

[0007] Preferably, one end of the support tube is connected to the knife tube body, a knife rod is provided inside the support tube and the knife tube body, a grinding drill bit is fixedly connected to one end of the knife rod, and an annular positioning groove is provided on the outer wall of the knife rod.

[0008] Preferably, a placement groove is provided on the side wall of one end of the support tube, an installation groove is provided on the inner wall of the placement groove away from the opening, the inner wall at the junction of the installation groove and the placement groove is fixedly connected to the docking plate, and the inner wall of the docking plate is fixedly connected to the sealing member.

[0009] Preferably, the sealing ring, the baffle ring and the elastic platform are all sleeved on the outer wall of the knife rod, the middle of the inner ring side wall of the sealing ring is fixedly connected to the positioning ring, the positioning ring is clamped with the positioning groove, one side of the sealing ring is fixedly connected to the baffle ring, and the other end of the baffle ring is fixedly connected to the elastic platform.

[0010] By adopting the above technical solution, the sealing ring and the knife rod can be connected more tightly, thereby ensuring the sealing effect.

[0011] Preferably, the fixing ring, the second baffle ring and the second elastic platform are all sleeved on the outer wall of the knife rod, the outer wall of the fixing ring is fixedly connected to the inner wall of the mounting groove, the side of the fixing ring away from the docking plate is fixedly connected to the second baffle ring, the other side of the second baffle ring is fixedly connected to the second elastic platform, the ends of the second elastic platform and the first elastic platform are fixedly connected to the rubber ring, and the second elastic platform and the first elastic platform are hollow truncated cone-shaped.

[0012] By adopting the above technical scheme, the sealing ring can be squeezed against the baffle ring 1 through the vibration of the tool rod, and then the baffle ring 2 can be resisted by the fixed ring to ensure that the elastic platform 2 and the elastic platform 1 are squeezed against each other, so that the rubber ring expands outward and is interference-connected with the inner wall of the installation groove, thereby ensuring the sealing effect of the inner wall of the support tube. At the same time, the elastic platform 2 and the elastic platform 1 can absorb the vibration generated by the drill bit and reduce the vibration effect.

[0013] Preferably, a retaining ring is provided at one end of the transition sleeve, the front end of the transition sleeve abuts against the retaining ring, the transition sleeve is sleeved on the outer wall of one end of the knife rod, the front end outer wall of the transition sleeve is connected to the bearing sleeve, one end of the bearing sleeve is fixedly connected to the clamping ring, and the other end of the clamping ring abuts against the sealing member.

[0014] By adopting the above technical solution, the gap between the bearing sleeve and the inner wall of the support tube can be ensured, and the sealing effect can be further ensured.

[0015] Preferably, the bearing sleeve is arranged on the outer wall of the bearing sleeve, and the bearing is sealed and connected to the placement groove via a sealing ring.

[0016] By adopting the above technical solution, the gap between the inner side of the bearing and the inner wall of the support tube can be ensured, thereby improving the sealing effect.

[0017] The beneficial effects of the utility model are:

[0018] The cooperation between the positioning ring and the positioning groove can make the sealing ring and the tool rod more closely connected to ensure the sealing effect. At the same time, the sealing ring can squeeze the baffle ring 1 through the vibration of the tool rod, and then the fixed ring can resist the baffle ring 2 to ensure that the elastic platform 2 and the elastic platform 1 squeeze each other, so that the rubber ring expands outward and is interference-connected with the inner wall of the installation groove, thereby ensuring the sealing effect of the inner wall of the support tube. At the same time, the elastic platform 2 and the elastic platform 1 can absorb the vibration generated by the grinding drill bit to reduce the vibration effect, and the sealing ring can be reset by the elasticity of the elastic platform 2 and the elastic platform 1 after the vibration ends; in addition, the gap between the bearing sleeve and the inner wall of the support tube can be avoided by the cooperation of the clamping ring and the seal on the docking plate to ensure the sealing effect. At the same time, the gap between the inner side of the bearing and the inner wall of the support tube can be ensured by the sealing ring, further improving the sealing effect to ensure the waterproof performance of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure provided by the implementation method of the utility model;

[0021] Figure 2 It is a schematic diagram of an overall half-section structure provided by an embodiment of the utility model;

[0022] Figure 3 The utility model embodiment provides Figure 2 A schematic diagram of the structure enlargement in the middle;

[0023] Figure 4 It is a schematic diagram of the internal explosion structure of the support tube provided in the embodiment of the utility model.

[0024] In the figure: 1. support tube; 2. knife tube body; 3. grinding drill bit; 4. knife rod; 5. positioning groove; 6. sealing ring; 7. retaining ring 1; 8. elastic platform 1; 9. installation groove; 10. rubber ring; 11. fixing ring; 12. placement groove; 13. sealing ring; 14. bearing; 15. bearing sleeve; 16. clamping ring; 17. sealing element; 18. docking plate; 19. retaining ring 2; 20. elastic platform 2; 21. positioning ring; 22. retaining ring; 23. transition sleeve. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example

[0027] Reference Figure 1-4 A double sealing structure of a spinal grinding drill bit comprises a support tube 1 and a tool tube body 2. A rubber ring 10 is arranged inside the support tube 1. A sealing ring 6, a retaining ring 7 and an elastic platform 8 are arranged on one side of the rubber ring 10. The sealing ring 6 is connected with a positioning ring 21. A fixing ring 11, a retaining ring 19 and an elastic platform 20 are arranged on the other side of the rubber ring 10. A transition sleeve 23 is arranged at one end of the support tube 1. A bearing 14, a bearing sleeve 15, a clamping ring 16 and a docking plate 18 are arranged on one side of the transition sleeve 23. The bearing 14 is connected with a sealing ring 13. A sealing member 17 is arranged on the inner side of the docking plate 18.

[0028] Furthermore, one end of the support tube 1 is connected to the knife tube body 2, and a knife rod 4 is arranged inside the support tube 1 and the knife tube body 2, and a grinding drill bit 3 is fixedly connected to one end of the knife rod 4, and an annular positioning groove 5 is opened on the outer wall of the knife rod 4; a placement groove 12 is opened on the side wall of one end of the support tube 1, and an installation groove 9 is opened on the inner wall of the placement groove 12 away from the opening, and the inner wall of the connection between the installation groove 9 and the placement groove 12 is fixedly connected to the docking plate 18, and the inner wall of the docking plate 18 is fixedly connected to the sealing member 17; the sealing ring 6, the retaining ring 7 and the elastic platform 8 are all sleeved on the outer wall of the knife rod 4, and the middle of the inner ring side wall of the sealing ring 6 is connected to the positioning ring 21 is fixedly connected, the positioning ring 21 is clamped with the positioning groove 5, one side of the sealing ring 6 is fixedly connected with the baffle ring 7, and the other end of the baffle ring 7 is fixedly connected with the elastic platform 8; the fixing ring 11, the baffle ring 19 and the elastic platform 20 are all sleeved on the outer wall of the knife rod 4, the outer wall of the fixing ring 11 is fixedly connected with the inner wall of the installation groove 9, the side of the fixing ring 11 away from the docking plate 18 is fixedly connected with the baffle ring 19, the other side of the baffle ring 19 is fixedly connected with the elastic platform 20, the elastic platform 20 and the elastic platform 8 are fixedly connected to the rubber ring 10 at one end, and the elastic platform 20 and the elastic platform 8 are hollow truncated cone-shaped.

[0029] It should be noted that: through the cooperation between the positioning ring 21 and the positioning groove 5, the sealing ring 6 can be connected to the tool rod 4 more closely to ensure the sealing effect, and the inner and outer side walls of the sealing ring 6 are respectively interference fit with the outer wall of the tool rod 4 and the inner wall of the installation groove 9, and at the same time, the sealing ring 6 can be squeezed against the baffle ring 17 through the vibration of the tool rod 4, and then the baffle ring 19 is resisted by the fixing ring 11 to ensure that the elastic platform 20 and the elastic platform 19 are squeezed against each other, so that the rubber ring 10 expands outward and is interference connected with the inner wall of the installation groove 9, thereby ensuring the sealing effect of the inner wall of the support tube 1, and at the same time, the elastic platform 20 and the elastic platform 18 can absorb the vibration generated by the grinding drill bit 3 to reduce the vibration effect, and after the vibration ends, the sealing ring 6 can be reset by the elasticity of the elastic platform 20 and the elastic platform 18; in addition, the bearing sleeve 15 and one end of the bearing 14 abut against the rear end of the transition sleeve 23, axially positioning the rear end of the bearing sleeve 15, and preventing the bearing sleeve 15 from moving backward.

[0030] Reference Figure 3-4 , further; a retaining ring 22 is provided at one end of the transition sleeve 23, and the front end of the transition sleeve 23 abuts against the retaining ring 22. The transition sleeve 23 is sleeved on the outer wall of one end of the arbor 4, and the outer wall of the front end of the transition sleeve 23 is connected to the bearing sleeve 15. One end of the bearing sleeve 15 is fixedly connected to the clamping ring 16, and the other end of the clamping ring 16 abuts against the seal 17; the bearing 14 is sleeved on the outer wall of the bearing sleeve 15, and the bearing 14 and the placement groove 12 are sealed and connected through the sealing ring 13.

[0031] It should be noted that: through the cooperation between the clamping ring 16 and the seal 17 on the docking plate 18, the gap between the bearing sleeve 15 and the inner wall of the support tube 1 can be avoided to ensure the sealing effect. At the same time, the gap between the inner side of the bearing 14 and the inner wall of the support tube 1 can be ensured by the sealing ring 13, further improving the sealing effect.

[0032] The working principle of this method is as follows: the cooperation between the positioning ring 21 and the positioning groove 5 can make the sealing ring 6 and the tool rod 4 more tightly connected to ensure the sealing effect. At the same time, the vibration of the tool rod 4 can make the sealing ring 6 squeeze the baffle ring 7, and then the fixed ring 11 resists the baffle ring 19 to ensure that the elastic platform 20 and the elastic platform 8 squeeze each other, so that the rubber ring 10 expands outward and is connected with the inner wall of the installation groove 9 through interference, thereby ensuring the sealing effect of the inner wall of the support tube 1. At the same time, the elastic platform 20 and the elastic platform 8 can absorb the vibration generated by the grinding drill bit 3. , reducing the vibration effect, and after the vibration ends, the sealing ring 6 can be reset by the elasticity of the elastic platform 20 and the elastic platform 1 8; in addition, the bearing sleeve 15 and one end of the bearing 14 abut against the rear end of the transition sleeve 23, axially positioning the rear end of the bearing sleeve 15, and preventing the bearing sleeve 15 from moving backward; in addition, through the cooperation of the clamping ring 16 and the sealing member 17 on the docking plate 18, the gap between the bearing sleeve 15 and the inner wall of the support tube 1 can be avoided to ensure the sealing effect, and at the same time, the gap between the inner side of the bearing 14 and the inner wall of the support tube 1 can be ensured by the sealing ring 13, further improving the sealing effect.

[0033] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0034] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A double-sealed structure for a spinal drill bit, comprising a support tube (1) and a tool tube body (2), characterized in that: A rubber ring (10) is provided inside the support tube (1), a sealing ring (6), a retaining ring (7) and an elastic platform (8) are provided on one side of the rubber ring (10), the sealing ring (6) is connected to a positioning ring (21), a fixing ring (11), a retaining ring (19) and an elastic platform (20) are provided on the other side of the rubber ring (10), a transition sleeve (23) is provided at one end of the support tube (1), a bearing (14), a bearing sleeve (15), a clamping ring (16) and a docking plate (18) are provided on one side of the transition sleeve (23), the bearing (14) is connected to the sealing ring (13), and a sealing member (17) is provided on the inner side of the docking plate (18).

2. A double seal structure for a spinal drill bit according to claim 1, characterized in that: One end of the support tube (1) is connected to the knife tube body (2); a knife rod (4) is provided inside the support tube (1) and the knife tube body (2); one end of the knife rod (4) is fixedly connected to a grinding drill bit (3); and an annular positioning groove (5) is provided on the outer wall of the knife rod (4).

3. The double sealing structure of a spinal drill bit according to claim 1, characterized in that: A placement groove (12) is provided on the side wall of one end of the support tube (1), and a mounting groove (9) is provided on the inner wall of the placement groove (12) away from the opening. The inner wall of the connection between the mounting groove (9) and the placement groove (12) is fixedly connected to a docking plate (18), and the inner wall of the docking plate (18) is fixedly connected to a sealing member (17).

4. A double seal structure for a spinal drill bit according to claim 2, characterized in that: The sealing ring (6), the retaining ring (7) and the elastic platform (8) are all sleeved on the outer wall of the knife rod (4); the middle of the inner ring side wall of the sealing ring (6) is fixedly connected to the positioning ring (21); the positioning ring (21) is clamped with the positioning groove (5); one side of the sealing ring (6) is fixedly connected to the retaining ring (7); and the other end of the retaining ring (7) is fixedly connected to the elastic platform (8).

5. A double seal structure for a spinal drill bit according to claim 3, characterized in that: The fixing ring (11), the second retaining ring (19) and the second elastic platform (20) are all sleeved on the outer wall of the knife rod (4); the outer wall of the fixing ring (11) is fixedly connected to the inner wall of the mounting groove (9); the side of the fixing ring (11) away from the docking plate (18) is fixedly connected to the second retaining ring (19); the other side of the second retaining ring (19) is fixedly connected to the second elastic platform (20); the end of the second elastic platform (20) close to the first elastic platform (8) is fixedly connected to the rubber ring (10); the second elastic platform (20) and the first elastic platform (8) are hollow truncated cone-shaped.

6. A double seal structure for a spinal drill bit according to claim 2, characterized in that: A retaining ring (22) is provided at one end of the transition sleeve (23), and the front end of the transition sleeve (23) abuts against the retaining ring (22). The transition sleeve (23) is sleeved on the outer wall of one end of the knife rod (4), and the front end outer wall of the transition sleeve (23) is connected to the bearing sleeve (15). One end of the bearing sleeve (15) is fixedly connected to the clamping ring (16), and the other end of the clamping ring (16) abuts against the sealing member (17).

7. A double seal structure for a spinal drill bit according to claim 3, characterized in that: The bearing (14) is sleeved on the outer wall of the bearing sleeve (15), and the bearing (14) is sealed and connected to the placement groove (12) via a sealing ring (13).

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