High-speed abrasive drill

Abstract

The utility model discloses a high-speed abrasive drill, which belongs to the technical field of abrasive drills, and comprises an abrasive drill body and a grinding head assembly, the side wall of the front end of the abrasive drill body is provided with a ball, a sliding sleeve and a sleeve spring in a sliding manner; the grinding head assembly comprises a grinding head, a first protective pipe, a front protective cover and a rear protective cover, and an annular groove is formed in the outer side of the rear protective cover; the rear end of the grinding head can be detachably inserted into the grinding drill body; guide pipes are arranged inside two ends of the first protective pipe. By overcoming the elastic force of the spring, the sliding sleeve slides backwards, and the grinding head assembly and the grinding drill body can be conveniently and rapidly disassembled and assembled; after the grinding head assembly and the grinding drill body are inserted in place, the sliding sleeve slides forwards, the balls are squeezed inwards and clamped into the annular groove, and reliable installation of the grinding head assembly and the grinding drill body is achieved. The guide pipes at the two ends can prevent the grinding head from making direct contact with the first protective pipe, heat generated by relative friction is effectively reduced, the design diameter of the grinding head is effectively increased, and the grinding head is prevented from being broken. The overall structure is simple, implementation is easy, and practicability is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill grinding, in particular to a high-speed drill grinding. Background Art

[0002] High-speed burr is a highly efficient tool widely used in surgical operations. It is an instrument with low vibration, low impact, high safety factor, more thorough decompression and easy operation. It can effectively reduce the risk of accidental injury during surgery, greatly simplify and speed up surgical steps, and improve surgical efficiency. It can be used to remove bone tissue in cranial and spinal surgeries.

[0003] High-speed burrs are widely used in spinal surgery, including the treatment of conditions such as herniated disc and spinal stenosis. They can quickly and precisely manipulate bone tissue, carefully removing the bone ridges on the inner wall of the tumor cavity in all directions under direct vision or navigation guidance until normal bone is exposed.

[0004] Traditional high-speed drills include a tool, a protective cover, and a drill body. Generally, to avoid potential cross-infection caused by repeated sterilization, the protective cover and tool of the high-speed drill are designed as an integrated structure to form a grinding head assembly for disposable clinical use. The installation method of the grinding head assembly and the drill body of the traditional high-speed drill requires first aligning and then rotating the grinding head assembly to achieve the locking of the grinding head assembly and the drill body. The operation has many steps, and the disassembly and assembly of the grinding head assembly is cumbersome and inconvenient. On the other hand, in order to ensure the cooling effect of the grinding head, some high-speed drills will install a water cooling structure in the protective cover. This will result in a relatively small diameter of the grinding head, which is very prone to breakage. Utility Model Content

[0005] In order to solve the installation method of the grinding head assembly and the grinding drill body of the traditional high-speed grinding drill, it is necessary to first align and then rotate the grinding head assembly to achieve the locking of the grinding head assembly and the grinding drill body. There are many operating steps, and the disassembly and assembly of the grinding head assembly is cumbersome and inconvenient; on the other hand, in order to ensure the cooling effect of the grinding head in some high-speed grinding drills, a water cooling structure will be installed in the protective cover, which will cause the diameter of the grinding head to be relatively small, and the problem of the grinding head being prone to breakage will occur. The utility model provides a high-speed grinding drill.

[0006] The utility model is realized through the following technical solutions:

[0007] A high-speed grinding drill comprises a grinding drill body and a grinding head assembly, the front end of the grinding drill body is in a cylindrical structure, a plurality of balls are arranged on the side wall of the front end of the grinding drill body and can be telescopically installed inward and outward, a sliding sleeve capable of pressing the balls inward is slidably sleeved on the front end of the grinding drill body, and a spring capable of elastically supporting the sliding sleeve forward is sleeved on the front end of the grinding drill body; the grinding head assembly comprises a grinding head, a first protective pipe, a front protective cover and a rear protective cover which are sequentially connected and installed from front to back, the rear protective cover is inserted and arranged at the front end of the grinding drill body, and an annular groove capable of being embedded and positioned with the balls is arranged on the outer side of the rear protective cover; the grinding head is rotatably installed in the first protective pipe, and the rear end of the grinding head can be detachably inserted and arranged with the grinding drill body; the inner sides of the two ends of the first protective pipe are provided with guide pipes capable of rotatably supporting the grinding head.

[0008] Further improvements of the utility model still have that the front end of the grinding drill body is provided with a plurality of plugs in an annular and spaced manner, and the outer side of the rear protective cover is provided with a positioning groove capable of being positioned and inserted with the plugs.

[0009] Further improvements of the utility model still have that the front part of the inner wall of the sliding sleeve is provided with an inclined annular surface which is tapered from front to back.

[0010] Further improvements of the utility model still have that the guide pipe is made of Teflon hose.

[0011] Further improvements of the utility model still have that the second transmission shaft is rotatably installed in the rear protective cover through a bearing, the front end of the second transmission shaft is connected with the grinding head, and the rear end of the second transmission shaft is connected with a first transmission shaft capable of being transmissionally connected with the grinding drill body.

[0012] Further improvements of the utility model still have that the front end of the second transmission shaft is provided with a boss capable of abutting against the front side of the inner ring of the bearing, and a limiting sleeve pipe capable of abutting against the rear side of the inner ring of the bearing is sleeved on the second transmission shaft.

[0013] Further improvements of the utility model still have that the inner side of the rear protective cover is provided with a boss capable of abutting against the rear side of the outer ring of the bearing, and an installation pipe capable of abutting against the front side of the outer ring of the bearing is installed on the inner side of the front end of the rear protective cover.

[0014] Further improvements of the utility model still have that the installation pipe is positioned and inserted with the inner side of the front protective cover, and is positioned and sleeved with the rear end of the first protective pipe.

[0015] Further improvements of the utility model still have that the inner side of the front end of the first protective pipe is inserted with a second protective pipe capable of positioning the guide pipe of the front end, and the second protective pipe is sleeved on the outer side of the grinding head.

[0016] Further improvements of the utility model still have that the outer side of the rear protective cover is sleeved with a protective sleeve capable of wrapping the front protective cover, and the outer side of the front protective cover is provided with a clamping groove capable of embedding and positioning the end part of the protective sleeve.

[0017] As can be seen from the above technical solutions, the utility model has the beneficial effects that:

[0018] By overcoming the spring force, the sleeve slides backward, unlocking the inward pressure on the ball bearings. This facilitates assembly and disassembly of the grinding head assembly (rear protective cover) and the drill body (front cylindrical structure). Once the grinding head assembly and drill body are fully assembled (the drill body output shaft is connected to the grinding head), the sleeve slides forward under the spring force, squeezing the ball bearings inward, causing the inner side of the ball bearings to engage within the annular groove on the rear protective cover, thus securing the grinding head assembly and drill body. Guide tubes, providing rotational support for the grinding head, are positioned inside each end of the first protective tube, preventing direct contact between the grinding head and the first protective tube. While ensuring reliable high-speed rotation, the guide tubes are constructed of high-temperature-resistant, low-thermal-conductivity materials to effectively reduce relative frictional heat generation and increase the designed diameter of the grinding head, preventing breakage. The overall structure is simple, easy to implement, and highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a structural diagram of a specific implementation method of the utility model.

[0021] Figure 2 for Figure 1 Schematic diagram of the partially enlarged structure of part A in the middle.

[0022] Figure 3 This is a schematic diagram of the grinding head assembly structure according to a specific embodiment of the present utility model.

[0023] Figure 4 This is a schematic diagram of the cooperation between the grinding head assembly and the grinding drill body according to a specific embodiment of the present utility model.

[0024] In the accompanying drawings: 100, grinding drill body, 101, spring, 102, ball bearing, 103, plug, 104, sleeve, 105, first step, 200, grinding head assembly, 210, sleeve, 220, rear protective cover, 221, annular groove, 222, positioning groove, 230, sealing ring, 241, first transmission shaft, 242, limiting sleeve, 243, bearing, 244, second transmission shaft, 245, grinding head, 246, guide tube, 247, mounting tube, 248, first protective tube, 249, second protective tube, 250, front protective cover, 251, slot. DETAILED DESCRIPTION

[0025] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0026] like Figures 1-4 As shown, the present invention discloses a high-speed drill grinder, comprising a drill grinder body 100 and a grinding head assembly 200 . The front end of the drill grinder body 100 is a cylindrical structure, and its output shaft is located at the axis center line position of the cylindrical structure. A number of balls 102 (in a ring array) are installed on the front end side wall of the drill grinding body 100 so as to be telescopically extended inward and outward. A sliding sleeve 104 is slidingly mounted on the front end of the drill grinding body 100 so as to press the balls 102 inward (when the sliding sleeve 104 slides forward, the balls 102 are pressed inward), and a spring 101 is elastically supported forward by the sliding sleeve 104 at the front end of the drill grinding body 100. The grinding head assembly 200 includes a grinding head 245, a first protective tube 248, a front protective cover 250 and a rear protective cover 220 which can be inserted into the front end of the drill grinding body 100. An annular groove 221 is provided on the outer side of the rear protective cover 220 for engaging and positioning the balls 102. The grinding head 245 is rotatably mounted in the first protective tube 248, and its rear end can be removed and inserted into the drill grinding body 100. Guide tubes 246 are provided on the inner sides of both ends of the first protective tube 248 for rotatably supporting the grinding head 245.

[0027] By overcoming the elastic force of the spring 101, the sleeve 104 slides backward, thereby unlocking the inward pressure of the sleeve 104 on the ball 102, thereby conveniently realizing the convenient disassembly and assembly of the grinding head assembly 200 (rear protective cover 220) and the drill grinding body 100 (front end cylindrical structure); after the grinding head assembly 200 and the drill grinding body 100 are inserted into place (the output shaft of the drill grinding body 100 is transmission-connected with the grinding head 245), the sleeve 104 slides forward under the elastic force of the spring 101, thereby realizing the inward squeezing of the sleeve 104 on the ball 102, so that the inner side of the ball 102 is stuck in the annular groove 221 on the rear protective cover 220, thereby realizing the reliable installation of the grinding head assembly 200 and the drill grinding body 100. Guide tubes 246 are provided on the inner sides of the first protective tube 248 to provide rotatable support for the grinding head 245, thereby preventing direct contact between the grinding head 245 and the first protective tube 248. While ensuring the high-speed rotation reliability of the grinding head 245, the guide tubes 246 are made of high-temperature resistant, low-thermal-conductivity materials, effectively reducing relative frictional heat generation and increasing the designed diameter of the grinding head 245, thereby preventing breakage. The overall structure is simple, easy to implement, and highly practical.

[0028] The inner side of the side wall of the cylindrical structure at the front end of the drill body 100 can limit the inward movement of the ball 102, that is, the size of the inner wall of the ball groove is smaller than the diameter of the ball 102, effectively preventing the ball 102 from falling out.

[0029] The outer side of the rear end of the rear protective cover 220 is provided with a sealing ring 230 which can seal with the inner side of the cylindrical structure at the front end of the drill body 100 to improve the sealing performance.

[0030] The front end of the drill mill body 100 is provided with a plurality of plugs 103 at annular intervals, and the outer side of the rear protective cover 220 is provided with positioning grooves 222 that can be positioned and inserted with the plugs 103. The positioning and insertion of the plugs 103 and the positioning grooves 222 ensure the accurate and reliable insertion of the grinding head assembly 200 and the drill mill body 100, and effectively prevent relative rotation.

[0031] The front portion of the inner wall of the sleeve 104 is provided with an inclined annular surface that is gradually reduced from front to back. Under the elastic force of the spring 101, when the sleeve 104 slides forward, the inclined annular surface can realize a smooth transition and inward pressing of the ball 102 to avoid jamming.

[0032] Furthermore, a first step 105 is provided on the inner side of the sliding sleeve 104 to elastically support the front end of the spring 101 , thereby ensuring the reliability of the elastic support of the sliding sleeve 104 by the spring 101 .

[0033] The guide tube 246 is made of Teflon hose, which has good support performance and good heat resistance, and effectively reduces frictional heat.

[0034] A second transmission shaft 244 is rotatably mounted within the rear protective cover 220 via a bearing 243. The front end of the second transmission shaft 244 is connected to a grinding head 245, and the rear end of the second transmission shaft 244 is connected to a first transmission shaft 241, which is in transmission connection with the drill body 100. The bearing 243 provides rotational support for the second transmission shaft 244, and the power transmitted by the first and second transmission shafts 241, 244 enables high-speed, stable rotation of the grinding head 245.

[0035] The front end of the second transmission shaft 244 is provided with a boss capable of abutting the front side of the inner ring of the bearing 243. A stopper sleeve 242 is mounted (welded) onto the second transmission shaft 244 and capable of abutting the rear side of the inner ring of the bearing 243. This ensures reliable positioning of the second transmission shaft 244 and the inner ring of the bearing 243, preventing axial movement and ensuring reliable high-speed rotation.

[0036] Among them, the inner side of the rear protective cover 220 is provided with a boss that can abut the rear side of the outer ring of the bearing 243, and the inner side of the front end of the rear protective cover 220 is installed with a mounting tube 247 that can abut the front side of the outer ring of the bearing 243. Reliable positioning and installation of the outer ring of the bearing 243 is achieved.

[0037] Furthermore, the mounting tube 247 is positioned and inserted into the inner side of the front protective cover 250, and is positioned and fitted onto the rear end of the first protective tube 248. This ensures the accuracy and reliability of the mutual installation of the front protective cover 250 and the rear protective cover 220 (the front protective cover 250 and the rear protective cover 220 can be connected and installed using a threaded connection), and ensures the reliability of the connection between the first protective tube 248 and the front protective cover 250 (the front end of the front protective cover 250 is welded to the outer side of the first protective tube 248).

[0038] A second protective tube 249, which is inserted into the inner front end of the first protective tube 248 and is used to position the guide tube 246, is sleeved onto the outer side of the grinding head 245. The second protective tube 249 effectively positions the guide tube 246 and reduces the diameter of the grinding head 245, ensuring flexibility in confined spaces.

[0039] A silicone sheath 210 is mounted on the outside of the rear shield 220, covering the front shield 250. A slot 251 is provided on the outside of the front shield 250 to engage and position the end of the sheath 210. The silicone sheath 210 protects the connection between the front and rear shields 250 and 220, making it easier to grip and prevent slipping. The slot 251 engages the end of the sheath 210, effectively preventing axial movement.

[0040] This high-speed grinding drill overcomes the elastic force of the spring 101 to make the sleeve 104 slide backward, thereby unlocking the inward pressure of the sleeve 104 on the ball 102, thereby conveniently realizing the convenient disassembly and assembly of the grinding head assembly 200 (rear protective cover 220) and the grinding drill body 100 (front end cylindrical structure); after the grinding head assembly 200 and the grinding drill body 100 are inserted into place (the output shaft of the grinding drill body 100 is transmission-connected with the grinding head 245), the sliding sleeve 104 slides forward under the elastic force of the spring 101, thereby realizing the inward squeezing of the sliding sleeve 104 on the ball 102, so that the inner side of the ball 102 is stuck in the annular groove 221 on the rear protective cover 220, thereby realizing the reliable installation of the grinding head assembly 200 and the grinding drill body 100. Guide tubes 246 are provided on the inner sides of the first protective tube 248 to provide rotatable support for the grinding head 245, thereby preventing direct contact between the grinding head 245 and the first protective tube 248. While ensuring the high-speed rotation reliability of the grinding head 245, the guide tubes 246 are made of high-temperature resistant, low-thermal-conductivity materials, effectively reducing relative frictional heat generation and increasing the designed diameter of the grinding head 245, thereby preventing breakage. The overall structure is simple, easy to implement, and highly practical.

[0041] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0042] The terms "upper," "lower," "outer," "inner," and the like, if used in the specification and claims of the present invention and the accompanying drawings, are used to distinguish relative positions and do not necessarily define them. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0043] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-speed drill grinder, comprising a drill grinder body (100) and a grinding head assembly (200), characterized in that: The front end of the drill grinding body (100) is a cylindrical structure. A plurality of balls (102) are installed on the side wall of the front end of the drill grinding body (100) so as to be telescopically movable. The front end of the drill grinding body (100) is provided with a sliding sleeve (104) capable of pressing the balls (102) inward, and the front end of the drill grinding body (100) is provided with a spring (101) capable of elastically supporting the sliding sleeve (104) forward. The grinding head assembly (200) includes a grinding head (245), a first protective tube (246) connected and installed in sequence from front to back. 48), a front protective cover (250) and a rear protective cover (220) capable of being inserted into the front end of the grinding drill body (100), the outer side of the rear protective cover (220) is provided with an annular groove (221) capable of being engaged and positioned with the ball (102); the grinding head (245) is rotatably installed in the first protective tube (248), and its rear end can be disassembled and inserted into the grinding drill body (100); the inner sides of both ends of the first protective tube (248) are provided with guide tubes (246) capable of rotatably supporting the grinding head (245).

2. The high-speed drill according to claim 1, characterized in that: A plurality of plugs (103) are provided at annular intervals at the front end of the grinding drill body (100), and a positioning groove (222) capable of being positioned and inserted with the plugs (103) is provided on the outer side of the rear protective cover (220).

3. The high-speed drill according to claim 1, characterized in that: The front portion of the inner wall of the sliding sleeve (104) is provided with an inclined annular surface that is gradually tapered from front to back.

4. The high-speed drill according to claim 1, characterized in that: The guide tube (246) is made of Teflon hose.

5. The high-speed drill according to claim 1, characterized in that: A second transmission shaft (244) is rotatably mounted inside the rear protective cover (220) via a bearing (243). The front end of the second transmission shaft (244) is connected to the grinding head (245), and the rear end of the second transmission shaft (244) is connected to a first transmission shaft (241) capable of being transmission-connected to the grinding drill body (100).

6. The high-speed drill according to claim 5, characterized in that: A boss capable of abutting against the front side of the inner ring of the bearing (243) is provided at the front end of the second transmission shaft (244), and a limiting sleeve (242) capable of abutting against the rear side of the inner ring of the bearing (243) is sleeved on the second transmission shaft (244).

7. The high-speed drill according to claim 5, characterized in that: A boss capable of abutting against the rear side of the outer ring of the bearing (243) is provided on the inner side of the rear protective cover (220), and a mounting tube (247) capable of abutting against the front side of the outer ring of the bearing (243) is installed on the inner side of the front end of the rear protective cover (220).

8. The high-speed drill according to claim 7, characterized in that: The mounting tube (247) is positioned and inserted into the inner side of the front protective cover (250), and is positioned and fitted with the rear end of the first protective tube (248).

9. The high-speed drill grinder according to claim 1, characterized in that: A second protective tube (249) capable of positioning the front guide tube (246) is inserted into the inner side of the front end of the first protective tube (248), and the second protective tube (249) is sleeved on the outer side of the grinding head (245).

10. The high-speed drill grinder according to claim 1, characterized in that: The outer side of the rear protective cover (220) is provided with a protective cover (210) capable of wrapping the front protective cover (250), and the outer side of the front protective cover (250) is provided with a card slot (251) capable of engaging and positioning the end of the protective cover (210).

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