Water injection grinding drill bit mechanism and orthopedic grinding head

Abstract

The utility model relates to the technical field of medical instruments, in particular to a water injection grinding drill bit mechanism and an orthopedic grinding head, the water injection grinding drill bit mechanism comprises a grinding drill bit assembly and an outer pipe, the grinding drill bit assembly comprises a grinding drill bit and a grinding handle connected with the grinding drill bit, a first cavity is formed in the grinding drill bit, a water outlet hole is formed in the grinding drill bit, and the outer pipe is connected with the grinding drill bit assembly. The water outlet hole is communicated with the first cavity, a second cavity is formed in the end, close to the grinding drill bit, of the grinding handle, and the second cavity is communicated with the first cavity; the grinding handle is sleeved with the outer pipe, a first water inlet hole is formed in the outer pipe, the first water inlet hole is used for injecting water into the outer pipe, a water flow channel is formed between the inner wall of the outer pipe and the outer wall of the grinding handle, and the water flow channel is communicated with the first water inlet hole and the second cavity. The partial cavity grinding handle and the cavity grinding drill bit are adopted, injected cooling water flows out of the water outlet holes in the grinding drill bit and effectively reaches the grinding drill bit and the grinding position, and the cooling efficiency and the cooling effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a water injection grinding drill mechanism and an orthopedic grinding head. Background Art

[0002] At present, in orthopedic surgery, grinding heads are often used to grind the surgical site of bones. However, grinding heads tend to heat up when rotating at high speeds, and the heating of the grinding heads will directly affect the grinding quality of the blade, that is, the grinding amount is reduced, resulting in inadequate grinding or increased surgical time. In addition, during the grinding process, heat is transmitted along the grinding handle. If the temperature is high, it will cause other damage to the surgical site and affect the service life of the grinding component.

[0003] In order to solve the problem of heating, some existing grinding heads generally have a water injection pipe sleeved on the outside of the grinding handle, and the gap between the grinding handle and the water injection pipe is used as a water flow channel. Water is discharged from the end of the water injection pipe close to the grinding head, or a water outlet hole is opened on the water injection pipe, and water is discharged from the water outlet hole. These two water outlet positions are generally deviated from the grinding head and do not directly act on the grinding head position, which often results in low cooling efficiency and poor cooling effect of the grinding head. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a water-injected grinding drill mechanism and an orthopedic grinding head, so as to at least solve the problem that the water outlet position of the existing orthopedic grinding head is offset from the grinding head, and does not directly act on the grinding head position, which often results in low cooling efficiency and poor cooling effect of the grinding head.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] In the first aspect, the utility model provides a water-injected drill bit mechanism, comprising a drill bit assembly and an outer tube, the drill bit assembly comprising a drill bit and a grinding handle connected to the drill bit, the drill bit having a first cavity inside, the drill bit having a water outlet hole on the drill bit, the water outlet hole being communicated with the first cavity, the grinding handle having a second cavity at one end close to the drill bit, the second cavity being communicated with the first cavity; the outer tube is sleeved on the grinding handle, the outer tube having a first water inlet hole, the first water inlet hole being used to inject water into the outer tube, a water flow channel is formed between the inner wall of the outer tube and the outer wall of the grinding handle, the water flow channel being communicated with both the first water inlet hole and the second cavity.

[0007] In combination with the first aspect, in some embodiments, the water injection grinding drill bit mechanism also includes a supporting guide tube, which is sleeved on the grinding handle, and the inner wall of the outer tube is in contact with the outer wall of the supporting guide tube, and the outer wall of the supporting guide tube has a first flat square, and the gap between the first flat square and the inner wall of the outer tube constitutes a first channel, which is a part of the water flow channel, and the first water inlet hole is located at one end of the first flat square, and the first water inlet hole is communicated with the first channel.

[0008] In combination with the first aspect, in some embodiments, a supporting cavity tube is sleeved between the outer tube and the grinding handle, and a second channel is provided inside the supporting cavity tube. The second channel is communicated with the first channel, and the second channel is also a part of the water flow channel.

[0009] In combination with the first aspect, in some embodiments, the support cavity tube has a step hole and a guide groove inside, the step hole is located at the end of the support cavity tube away from the drill bit, the guide groove is opened on the inner wall of the support cavity tube, the guide groove is connected with the step hole to form a second channel, and the guide groove is connected with the second cavity.

[0010] In combination with the first aspect, in some embodiments, the grinding handle is provided with a second water inlet hole on the cavity wall of the second cavity, and the second water inlet hole is communicated with both the guide groove and the second cavity.

[0011] In combination with the first aspect, in some embodiments, a front support tube and a rear support tube are further arranged between the support cavity tube and the grinding handle, the front support tube is sleeved on one end of the grinding handle close to the grinding drill bit, one end of the front support tube is close to the grinding drill bit, and the other end is inserted into the support cavity tube and avoids the second water inlet hole, the rear support tube is also sleeved on the grinding handle and avoids the second water inlet hole, and the position of the rear support tube corresponds to the position of the guide groove.

[0012] The water-injected drill bit mechanism of the utility model injects water into the first cavity and the second cavity, and the injected water flows out from the water outlet of the drill bit. The drill bit is the structural component closest to the grinding position, and the water flowing out of the drill bit can directly act on the grinding position and the grinding head, which can not only cool down the tissue at the grinding position, but also effectively cool down the grinding head, which is conducive to improving the cooling efficiency and cooling effect. In addition, water is injected into the second cavity inside the grinding handle close to the drill bit, which can cool down the grinding handle during the grinding process, and extend the service life of the drill bit assembly to a certain extent.

[0013] In a second aspect, the utility model provides an orthopedic grinding head, comprising the water injection grinding drill bit mechanism described in the first aspect.

[0014] In combination with the second aspect, in some embodiments, the orthopedic grinding head also includes a handle assembly, the handle assembly includes an outer shell and an input shaft, the outer tube is inserted in the outer shell, the input shaft is transmission-connected to the grinding handle, and a water inlet channel is provided in the handle assembly, and the water outlet end of the water inlet channel is communicated with the first channel.

[0015] In combination with the second aspect, in some embodiments, the outer shell includes a first shell and a second shell, the outer tube is inserted in the first shell, the outer wall of the outer tube has a water inlet groove, the water inlet groove is communicated with the first water inlet hole, and the water inlet groove is located in the first shell; a water cooling interface is installed in the second shell, the water cooling interface is sleeved on the input shaft, the outer wall of the water cooling interface has a first water injection groove, a spiral channel and a second water injection groove which are connected in sequence, the first shell has a third water inlet hole, the water outlet end of the second water injection groove is communicated with the third water inlet hole, and the water outlet end of the third water inlet hole is communicated with the water inlet groove.

[0016] In combination with the second aspect, in some embodiments, a driven gear is fixed on the end of the grinding handle away from the drill bit, a driving gear is fixed on the input shaft, and the driven gear and the driving gear are meshed; a bearing is installed between the input shaft and the water cooling interface, and a bearing is also installed between the outer tube and the grinding handle near the driven gear.

[0017] The orthopedic grinding head of the utility model adopts a partially hollow grinding handle and a hollow grinding drill bit, and the injected cooling water flows out from the water outlet on the grinding drill bit, effectively reaching the grinding drill bit and the grinding position, which is conducive to improving the cooling efficiency and cooling effect. The orthopedic grinding head of the utility model has a simple internal structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of the water injection grinding drill bit mechanism of Example 1;

[0019] Figure 2 is a schematic structural diagram of a water injection drill bit mechanism of Example 1;

[0020] Figure 3 It is a partially enlarged structural schematic diagram of the grinding head assembly;

[0021] Figure 4 is an enlarged structural schematic diagram of the supporting cavity tube;

[0022] Figure 5 is a schematic diagram of the exploded structure of the orthopedic grinding head of Example 2;

[0023] Figure 6 is a cross-sectional view of the orthopedic grinding head of Example 2;

[0024] Figure 7 is a schematic structural diagram of an orthopedic grinding head according to Embodiment 2;

[0025] The drill bit assembly 100, the drill bit 110, the first cavity 111, the water outlet 112, the grinding handle 120, the second cavity 121, the first section 1201, the second section 1202, the second water inlet 122, the outer tube 200, the first water inlet 210, the through hole 220, the water inlet groove 230, the support guide tube 300, the first flat square 310, the blind hole 320, the support cavity tube 400, the step hole 410, the guide groove 4 20, front support tube 510, rear support tube 520, outer shell 610, first shell body 611, annular groove 6111, third water inlet hole 6112, second shell body 612, buckle 6121, input shaft 620, water cooling interface 700, first water injection groove 710, spiral channel 720, second water injection groove 730, driven gear 810, driving gear 820, bearing 830, first channel 001, second channel 002. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0027] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] In order to solve the problem of heating, some existing grinding heads generally have a water injection pipe outside the grinding handle, and use the gap between the grinding handle and the water injection pipe as a water injection flow channel, and water is discharged from the end of the water injection pipe close to the grinding head, or a water outlet hole is opened on the water injection pipe, and water is discharged from the water outlet hole. These two water outlet positions are generally deviated from the grinding position and do not directly act on the grinding position, which often causes low cooling efficiency and poor cooling effect. In order to solve the above problems, the utility model proposes a water injection grinding drill mechanism and an orthopedic grinding head, please refer to Examples 1-2 for details.

[0029] Example 1

[0030] Please refer to Figure 1-Figure 4 This embodiment describes a water injection drill bit mechanism, including a drill bit assembly 100 and an outer tube 200. The drill bit assembly 100 includes a drill bit 110 and a grinding handle 120 connected to the drill bit 110. The drill bit 110 has a first cavity 111 inside, and a water outlet 112 on the drill bit 110. The water outlet 112 is connected to the first cavity 111. The grinding handle 120 has a second cavity 121 at one end close to the drill bit 110, and the second cavity 121 is connected to the first cavity 111. The outer tube 200 is sleeved on the grinding handle 120, and has a first water inlet 210 on the outer tube 200. The first water inlet 210 is used to inject water into the hollow interior of the outer tube 200. A water flow channel is formed between the inner wall of the outer tube 200 and the outer wall of the grinding handle 120, and the water flow channel is connected to both the first water inlet 210 and the second cavity 121.

[0031] In order to better set the second cavity 121 inside the grinding handle 120, the grinding handle 120 includes a first section 1201 and a second section 1202. The first section 1201 of the grinding handle 120 is connected to the drill bit 110. The outer diameter of the first section 1201 of the grinding handle 120 is greater than the outer diameter of the second section 1202 of the grinding handle 120. The second cavity 121 is located in the first section 1201 of the grinding handle 120.

[0032] The water-injected grinding drill bit 110 mechanism also includes a supporting guide tube 300, which is sleeved on the grinding handle 120, and the inner wall of the outer tube 200 is in tight contact with the outer wall of the supporting guide tube 300. The outer wall of the supporting guide tube 300 has a first flat square 310, and the gap between the first flat square 310 and the inner wall of the outer tube 200 constitutes a first channel 001. The first channel 001 is part of the water flow channel, and the first water inlet hole 210 is located at one end of the first flat square 310, and the first water inlet hole 210 is communicated with the first channel 001.

[0033] The support guide tube 300 also has a blind hole 320, and the outer tube 200 has a through hole 220 at a position corresponding to the blind hole 320. The center lines of the through hole 220 and the blind hole 320 coincide with each other. Screws or pins are passed through the through hole 220 and the blind hole 320 to achieve a fixed connection between the support guide tube 300 and the outer tube 200, thereby preventing the support guide tube 300 from rotating with the grinding handle 120.

[0034] A support hollow tube 400 is sleeved between the outer tube 200 and the grinding handle 120. A second channel 002 is provided inside the support hollow tube 400. The second channel 002 communicates with the first channel 001 and is also a part of the water flow channel. The support hollow tube 400 and the support guide tube 300 can be separated by one end or just in contact with each other. One end of the support guide tube 300 can also be inserted into the support hollow tube 400, but the second channel 002 must be communicated with the first channel 001.

[0035] Please refer to Figure 4 The support hollow tube 400 has a stepped hole 410 and a guide groove 420 inside. The stepped hole 410 is located at the end of the support hollow tube 400 away from the grinding drill bit 110. The guide groove 420 is opened on the inner wall of the support hollow tube 400. The guide groove 420 is connected with the stepped hole 410 to form a second channel 002. The guide groove 420 is connected with the second cavity 121. The end of the support hollow tube 400 close to the grinding drill bit 110 extends out of the outer tube 200, and the outer wall of the support hollow tube 400 extending out of the outer tube 200 is flush with the outer wall of the outer tube 200.

[0036] The grinding handle 120 is provided with a second water inlet hole 122 on the cavity wall of the second cavity 121 . The second water inlet hole 122 is communicated with both the guide groove 420 and the second cavity 121 .

[0037] In order to make the grinding handle 120 more stable during the grinding process, a front support tube 510 and a rear support tube 520 are further arranged between the supporting cavity tube 400 and the grinding handle 120. The front support tube 510 is sleeved on one end of the grinding handle 120 close to the grinding drill bit 110. One end of the front support tube 510 is close to the grinding drill bit 110, and the other end is inserted into the supporting cavity tube 400 and avoids the second water inlet hole 122. The rear support tube 520 is also sleeved on the grinding handle 120 and avoids the second water inlet hole 122. The position of the rear support tube 520 corresponds to the position of the guide groove 420.

[0038] During the grinding process, when water injection is required for cooling, water enters the first channel 001 from the first water inlet hole 210 on the outer tube 200, flows along the first channel 001 to the second channel 002, flows from the step hole 410 to the guide groove 420 in the second channel 002, enters the second cavity 121 through the second water inlet hole 122, flows from the second cavity 121 to the first cavity 111, and flows out from the water outlet hole 112 on the drill bit 110. The water flowing out of the drill bit 110 can directly act on the grinding position and the drill bit 110, which can not only cool down the tissue at the grinding position, but also effectively cool down the drill bit 110, which is conducive to improving the cooling efficiency and cooling effect. In addition, water is injected into the second cavity 121 inside the grinding handle 120 close to the drill bit 110, which can cool down the grinding handle 120 during the grinding process, and to a certain extent extend the service life of the drill bit 110 assembly 100.

[0039] Example 2

[0040] Please refer to Figure 5-Figure 7 This embodiment describes an orthopedic grinding head, including the water injection grinding drill mechanism of embodiment 1. The orthopedic grinding head also includes a handle assembly, which includes a housing 610 and an input shaft 620. The input shaft 620 is used to connect to an external power mechanism, such as a motor, and drives the input shaft 620 to rotate under the action of the external power mechanism. The outer tube 200 is inserted into the housing 610, and the input shaft 620 is transmission-connected to the grinding handle 120. A water inlet channel is provided in the handle assembly, and the water outlet end of the water inlet channel is communicated with the first channel 001.

[0041] The housing 610 includes a first housing 611 and a second housing 612. The first housing 611 is inserted into the second housing 612, and the first housing 611 and the second housing 612 are sealed. Specifically, the outer wall of the first housing 611 has an annular groove 6111, and the second housing 612 has a buckle ring 6121. The buckle ring 6121 is embedded in the annular groove 6111 and sealed by a sealant. The outer tube 200 is inserted into the first housing 611, and the outer wall of the outer tube 200 has a water inlet groove 230, which is communicated with the first water inlet hole 210 and is located in the first housing 611. A water cooling interface 700 is installed in the second shell 612, and the water cooling interface 700 is sleeved on the input shaft 620. The outer wall of the water cooling interface 700 has a first water injection groove 710, a spiral channel 720 and a second water injection groove 730 which are connected in sequence. The first shell 610 has a third water inlet hole 6112, and the third water inlet hole 6112 is located in the second shell 610. The water outlet end of the second water injection groove 730 is connected to the third water inlet hole 6112, and the water outlet end of the third water inlet hole 6112 is connected to the water inlet groove 230.

[0042] A driven gear 810 is fixed to one end of the grinding handle 120 away from the grinding drill bit 110, and a driving gear 820 is fixed to the input shaft 620, and the driven gear 810 and the driving gear 820 are meshed; a bearing 830 is installed between the input shaft 620 and the water cooling interface 700, and a bearing 830 is also installed between the outer tube 200 and the grinding handle 120 near the driven gear 810. When the input shaft 620 rotates, the driving gear 820 also rotates, and the driven gear 810 meshed with the driving gear 820 also rotates, driving the grinding handle 120 and the grinding drill bit 110 to rotate to grind the bone tissue.

[0043] Water is injected into the first water injection groove 710 on the water cooling interface 700 through an external water injection mechanism. The injected water flows through the first water injection groove 710, the spiral channel 720 and the second water injection groove 730, and enters the water inlet groove 230 from the third water inlet hole 6112, and then enters the water flow channel through the first water inlet hole 210 and then flows to the second cavity 121 and the first cavity 111, and flows out from the water outlet hole 112 on the drill bit 110.

[0044] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A water injection drill bit mechanism, characterized in that: The drill bit assembly comprises a drill bit and an outer tube, wherein the drill bit assembly comprises a drill bit and a grinding handle connected to the drill bit, wherein the drill bit has a first cavity inside, the drill bit has a water outlet, the water outlet is connected to the first cavity, and the grinding handle has a second cavity at one end close to the drill bit, the second cavity is connected to the first cavity; The outer tube is sleeved on the grinding handle and has a first water inlet hole, which is used to inject water into the outer tube. A water flow channel is formed between the inner wall of the outer tube and the outer wall of the grinding handle, and the water flow channel is connected to the first water inlet hole and the second cavity.

2. The water injection drill bit mechanism according to claim 1, characterized in that: The water injection grinding drill bit mechanism also includes a supporting guide tube, which is sleeved on the grinding handle, and the inner wall of the outer tube is in contact with the outer wall of the supporting guide tube. The outer wall of the supporting guide tube has a first flat square, and the gap between the first flat square and the inner wall of the outer tube constitutes a first channel, which is a part of the water flow channel. The first water inlet hole is located at one end of the first flat square, and the first water inlet hole is connected to the first channel.

3. The water injection drill bit mechanism according to claim 2, characterized in that: A supporting cavity tube is sleeved between the outer tube and the grinding handle, and a second channel is arranged inside the supporting cavity tube. The second channel is communicated with the first channel, and the second channel is also a part of the water flow channel.

4. The water injection drill bit mechanism according to claim 3, characterized in that: The support cavity tube has a step hole and a guide groove inside. The step hole is located at one end of the support cavity tube away from the drill bit. The guide groove is opened on the inner wall of the support cavity tube. The guide groove is connected with the step hole to form a second channel. The guide groove is connected with the second cavity.

5. The water injection drill bit mechanism according to claim 4, characterized in that: The grinding handle is provided with a second water inlet hole on the cavity wall of the second cavity, and the second water inlet hole is communicated with both the guide groove and the second cavity.

6. The water injection drill bit mechanism according to claim 5, characterized in that: A front support tube and a rear support tube are also provided between the support cavity tube and the grinding handle. The front support tube is sleeved on one end of the grinding handle close to the grinding drill bit. One end of the front support tube is close to the grinding drill bit, and the other end is inserted into the support cavity tube and avoids the second water inlet hole. The rear support tube is also sleeved on the grinding handle and avoids the second water inlet hole. The position of the rear support tube corresponds to the position of the guide groove.

7. Orthopedic grinding head, characterized in that: It comprises a water injection grinding drill bit mechanism as described in any one of claims 1-6.

8. The orthopedic grinding head according to claim 7, characterized in that: The orthopedic grinding head also includes a handle assembly, which includes an outer shell and an input shaft. The outer tube is inserted into the outer shell, and the input shaft is transmission-connected to the grinding handle. A water inlet channel is provided in the handle assembly, and a water outlet end of the water inlet channel is communicated with the first channel.

9. The orthopedic grinding head according to claim 8, characterized in that: The housing comprises a first shell and a second shell, the outer tube is inserted in the first shell, the outer wall of the outer tube is provided with a water inlet groove, the water inlet groove is communicated with the first water inlet hole, and the water inlet groove is located in the first shell; A water cooling interface is installed in the second shell, and the water cooling interface is sleeved on the input shaft. The outer wall of the water cooling interface has a first water injection groove, a spiral channel and a second water injection groove which are connected in sequence. The first shell has a third water inlet hole, and the water outlet end of the second water injection groove is connected to the third water inlet hole, and the water outlet end of the third water inlet hole is connected to the water inlet groove.

10. The orthopedic grinding head according to claim 8, characterized in that: A driven gear is fixed on one end of the grinding handle away from the grinding drill bit, a driving gear is fixed on the input shaft, and the driven gear and the driving gear are meshed; a bearing is installed between the input shaft and the water cooling interface, and a bearing is also installed between the outer tube and the grinding handle near the driven gear.

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