Surgical sawing and grinding tool bit and sawing and grinding tool

Abstract

The utility model relates to the field of medical instruments, and discloses a sawing and grinding tool bit and a sawing and grinding tool for an operation, and the sawing and grinding tool bit comprises a base plate, a connecting handle and a tooth part; the connecting handle is fixed at one end of the base plate; the tooth part is fixed to the end, away from the connecting handle, of the base plate, and a plurality of saw grinding teeth are arranged on the tooth part; continuous tooth blades are designed on the edges of the saw grinding teeth, and the tooth blades are distributed on the front side and the rear side of the tooth part and the side away from the base plate. The sawing and grinding teeth are arranged on the sawing and grinding knife head, so that the sawing and grinding knife can be used as a sawing knife and can also be used as a grinding knife, the time for a surgeon to switch the knife in an operation can be shortened, the operation time is shortened, and the operation risk of a patient is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a saw and grind tool head for surgery and a saw and grind tool. Background Art

[0002] In orthopedic or spinal surgery, medical staff often use saw blades to saw the bone tissue of patients and often use grinders to grind the bone tissue of patients. Saw blades and grinders are both commonly used surgical instruments in orthopedic surgery, and in the same operation, the two types of tools are often used in combination.

[0003] However, clinically, saw blades and grinders are two independent surgical tools, and the process of the surgeon switching tools during the operation is time-consuming, which directly leads to an increase in the operation time and an increase in the surgical risk of patients. Summary of the Invention

[0004] In view of this, the purpose of the utility model is to provide a saw and grind tool head for surgery and a saw and grind tool, which are used to solve the problem pointed out in the background art that clinically, saw blades and grinders are two independent surgical tools, and the process of the surgeon switching tools during the operation is time-consuming, which directly leads to an increase in the operation time and an increase in the surgical risk of patients.

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

[0006] In a first aspect, the present application provides a saw and grind tool head for surgery, and the saw and grind tool head includes:

[0007] A substrate;

[0008] A connecting handle, which is fixed at one end of the substrate; and

[0009] A tooth part, which is fixed at the end of the substrate away from the connecting handle, and a plurality of saw and grind teeth are arranged on the tooth part.

[0010] In combination with the first aspect, it is further limited that continuous tooth edges are designed at the edges of the saw and grind teeth, and the tooth edges are distributed on the front and back sides of the tooth part and the side away from the substrate.

[0011] In combination with the first aspect, it is further limited that the tooth edge on the side away from the substrate is designed as an arc transition structure.

[0012] In combination with the first aspect, it is further limited that the extension length of the saw and grind teeth at the middle part away from the substrate end is greater than the extension lengths of the saw and grind teeth on both sides.

[0013] In combination with the first aspect, it is further limited that there is a chip removal groove between two adjacent saw and grind teeth.

[0014] In combination with the first aspect, it is further defined that the projection line of the tooth blade projected onto the YOZ plane is inclined with respect to the extended baseline of the connecting handle projected onto the YOZ plane.

[0015] In a second aspect, the present application provides a surgical sawing and grinding tool, which includes:

[0016] A housing;

[0017] A sawing and grinding tool head as described in any one of the first aspects, the connecting handle of the sawing and grinding tool head being hinged to the housing; and

[0018] A driving assembly, which is installed in the housing and is used to drive the sawing and grinding tool head to swing reciprocally.

[0019] In combination with the second aspect, it is further defined that the housing includes a tool head seat, an outer tube body, and a rear housing that are connected in sequence;

[0020] One end of the tool head seat away from the outer tube body is provided with an installation position for installing the sawing and grinding tool head, and the connecting handle of the sawing and grinding tool head is hinged to the installation position of the sawing and grinding tool head through a pin shaft.

[0021] In combination with the second aspect, it is further defined that the driving assembly includes a transmission shaft and an eccentric shaft;

[0022] A first sleeve and a second sleeve are installed in the housing, the transmission shaft is installed in the first sleeve through a bearing, and the eccentric shaft is rotatably installed in the second sleeve through a bearing;

[0023] One end of the transmission shaft is coaxially fixed to one end of the eccentric shaft, and the other end is used to connect a rotary power source;

[0024] An eccentric drive shaft is fixed to the end of the eccentric shaft away from the transmission shaft, the axis of the eccentric drive shaft is parallel to and non-coincident with the axis of the eccentric shaft, and a reciprocating conversion bearing is installed on the eccentric drive shaft;

[0025] One end of the connecting handle of the sawing and grinding tool head away from the substrate is provided with a reciprocating conversion groove, the reciprocating conversion groove is designed as a U-shaped structure, and the reciprocating conversion bearing is movably installed in the reciprocating conversion groove.

[0026] In combination with the second aspect, it is further defined that the sawing and grinding tool further includes a cooling kit, and the cooling kit includes a spiral water-cooling sleeve and a rubber sleeve;

[0027] The spiral water-cooling sleeve is sleeved on the outer side of the rear housing, and a water inlet, a spiral water groove, and a water outlet that are sequentially communicated are provided on the outer side wall of the spiral water-cooling sleeve;

[0028] The rubber sleeve is sleeved on the outer side of the spiral water-cooling sleeve, so as to form a first cooling water channel between the water inlet, the spiral water groove, the water outlet and the inner side wall of the rubber sleeve;

[0029] A first plane is arranged on the outer side wall of the first sleeve, and the outer tube body is sleeved on the first sleeve, so as to form a second cooling water channel between the first plane and the inner side wall of the outer tube body;

[0030] A through hole communicating the first cooling water channel and the second cooling water channel is arranged on the rear housing;

[0031] A second plane is arranged on the outer side wall of the second sleeve, and the outer tube body is sleeved on the second sleeve, so as to form a third cooling water channel between the second plane and the inner side wall of the outer tube body. One end of the third cooling water channel is communicated with the second cooling water channel, and the other end is communicated with the installation position of the tool head seat.

[0032] The beneficial effects of the utility model are as follows:

[0033] By arranging saw grinding teeth on the saw grinding tool head in this application, the saw grinding tool can be used both as a saw blade and as a grinding tool, which can reduce the time for the main surgeon to switch tools during the operation, thereby shortening the operation time and reducing the operation risk of the patient. Description of the drawings

[0034] Figure 1 is the structural schematic diagram of the saw grinding tool head in the embodiment of this application Figure 1 ;

[0035] Figure 2 is the structural schematic diagram of the saw grinding tool head in the embodiment of this application Figure 2 ;

[0036] Figure 3 is the front view of the saw grinding tool head in the embodiment of this application;

[0037] Figure 4 is the structural schematic diagram of the saw grinding tool in the embodiment of this application;

[0038] Figure 5 is the cross-sectional view of the saw grinding tool in the embodiment of this application;

[0039] Figure 6 is the embodiment of this application Figure 5 The enlarged schematic diagram at A;

[0040] Figure 7 is the embodiment of this application Figure 5 The enlarged schematic diagram at B;

[0041] Figure 8 is the structural schematic diagram of the spiral water-cooling sleeve in the embodiment of this application;

[0042] Figure 9 It is a schematic structural diagram of the first sleeve in the embodiment of the present application;

[0043] Figure 10 It is a schematic structural diagram of the second sleeve in the embodiment of the present application;

[0044] Among them, 100 is a saw grinding head; 110 is a substrate; 120 is a connecting handle; 121 is a reciprocating conversion groove; 122 is an extended baseline; 130 is a tooth part; 131 is a saw grinding tooth; 132 is a tooth edge; 133 is an arc transition structure; 134 is a chip removal groove; 135 is a projection line; 210 is a tool head seat; 211 is an installation position; 212 is a pin shaft; 220 is an outer tube body; 230 is a rear housing; 231 is a through port; 240 is the first sleeve; 241 is the first plane; 250 is the second sleeve; 251 is the second plane; 310 is a transmission shaft; 320 is an eccentric shaft; 321 is an eccentric drive shaft; 322 is a reciprocating conversion bearing; 410 is a spiral water cooling sleeve; 411 is a water inlet; 412 is a spiral water channel; 413 is a water outlet; 420 is a rubber sleeve; 430 is the first cooling water channel; 440 is the second cooling water channel; 450 is the third cooling water channel. Detailed implementation manners

[0045] The following uses specific specific embodiments to illustrate the implementation manners of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. It should be noted that the drawings provided in the following embodiments are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present invention. In order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0046] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or position relationship, it is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only for illustrative purposes and should not be construed as a limitation to the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0047] Embodiment 1

[0048] As Figures 1 - 3As shown in the figure, this embodiment provides a surgical saw sharpening head 100. The saw sharpening head 100 includes an integrally formed substrate 110, a connecting handle 120, and a tooth part 130. Among them, the connecting handle 120 is fixed to one end of the substrate 110. The main function of the connecting handle 120 is to install the entire saw sharpening head 100 on a saw sharpening tool, and the saw sharpening tool can control the saw sharpening head 100 to swing reciprocally. The tooth part 130 is fixed to the end of the substrate 110 away from the connecting handle 120, and a plurality of saw sharpening teeth 131 are provided on the tooth part 130. By designing the saw sharpening teeth 131, the saw sharpening head 100 can be used as both a saw and a knife sharpener, which can reduce the time for the surgeon to switch tools during the operation, thereby shortening the operation time and reducing the surgical risk of the patient.

[0049] In this embodiment, a continuous tooth edge 132 is designed on the edge of the saw sharpening tooth 131, and the tooth edge 132 is distributed on the front and back sides of the tooth part 130 and on the side away from the substrate 110.

[0050] It should be noted that for the specific orientation regulations of the X, Y, and Z axes in the three-dimensional coordinates involved in this embodiment, please refer to Figure 2 and Figure 3 . Figure 2 The direction indicated by the positive half-axis of the X axis is the front side of the tooth part 130, and the direction indicated by the negative half-axis of the X axis is the back side of the tooth part 130. Generally speaking, the tooth edge 132 on the side away from the substrate 110 can be used for sawing the patient's bone tissue, and the tooth edges 132 on the front and back sides can be used for grinding the patient's bone tissue, so that the saw sharpening tooth 131 realizes the function of sawing and grinding in one.

[0051] In this embodiment, the tooth edge 132 on the side away from the substrate 110 is designed as an arc transition structure 133. By setting it like this, the tooth edge 132 on the side away from the substrate 110 can be more suitable for sawing operations on bone tissue.

[0052] Actually, the tooth edge 132 on the side away from the substrate 110 can also be set as a triangular sharp structure, which can also be suitable for the tooth edge 132 on the side away from the substrate 110.

[0053] In this embodiment, the extension length of the saw sharpening tooth 131 in the middle away from the substrate 110 is greater than the extension lengths of the saw sharpening teeth 131 on both sides. It should be noted that the saw sharpening head 100 is installed on the saw sharpening tool by a hinged method. During use, the saw sharpening head 100 can swing reciprocally around an axis, and the movement trajectory of the tooth part 130 is an arc. By designing it like this, the shape of the saw sharpening tooth 131 away from the substrate 110 can adapt to the movement trajectory of the tooth part 130, better saw the patient's bone tissue, and has strong practicability.

[0054] In this embodiment, there is a chip removal groove 134 between two adjacent sawing and grinding teeth 131. By providing the chip removal groove 134, it is possible to prevent bone tissue debris of the patient from splashing during the operation, and the practicability is relatively strong.

[0055] In this embodiment, as Figure 3 shown, the projection line 135 of the tooth edge 132 projected onto the YOZ plane is inclined with respect to the extension baseline 122 of the connecting handle 120 projected onto the YOZ plane, and the included angle between the projection line 135 and the extension baseline 122 is an obtuse angle. By setting it in this way, when the surgeon holds the sawing and grinding tool, the tooth part 130 of the sawing and grinding head 100 can be directly facing the patient's bone tissue, which is convenient for the doctor to operate.

[0056] Embodiment Two

[0057] As Figures 4 - 10 shown, this embodiment provides a sawing and grinding tool for surgery. The sawing and grinding tool includes a housing, a sawing and grinding head 100 as described in Embodiment One, and a driving component. Among them, the connecting handle 120 of the sawing and grinding head 100 is hinged to the housing. The driving component is installed in the housing and is used to drive the sawing and grinding head 100 to swing reciprocally. By providing the sawing and grinding head 100, the sawing and grinding tool can be used both as a saw and as a grinding tool, which can reduce the time for the surgeon to switch tools during the operation, thereby shortening the operation time and reducing the surgical risk of the patient.

[0058] In this embodiment, the housing includes a tool head seat 210, an outer tube 220, and a rear housing 230 that are sequentially connected and fixed. The tool head seat 210, the outer tube 220, and the rear housing 230 are all structures with open ends at both ends and hollow interiors. Specifically, both ends of the outer tube 220 are inserted into the tool head seat 210 and the rear housing 230, and then sealed and fixed using glue, bolts, etc. An installation position 211 for installing the sawing and grinding head 100 is provided at one end of the tool head seat 210 away from the outer tube 220. The connecting handle 120 of the sawing and grinding head 100 is hinged to the installation position 211 of the sawing and grinding head 100 through a pin shaft 212, and a pin hole adapted to the pin shaft 212 is provided on the connecting handle 120.

[0059] In this embodiment, the driving assembly includes a transmission shaft 310 and an eccentric shaft 320. A first sleeve 240 and a second sleeve 250 are fixed inside the housing. The transmission shaft 310 is rotatably installed in the first sleeve 240 through a bearing, and the eccentric shaft 320 is rotatably installed in the second sleeve 250 through a bearing. One end of the transmission shaft 310 is coaxially fixed to one end of the eccentric shaft 320. Specifically, a connection hole is provided at one end of the eccentric shaft 320, and one end of the transmission shaft 310 is connected to the connection hole by a key connection, so as to achieve the coaxial fixation between the transmission shaft 310 and the eccentric shaft 320. The end of the transmission shaft 310 away from the eccentric shaft 320 is used to connect a rotary power source, and the rotary power source is preferably a motor (not shown in the figure).

[0060] An eccentric drive shaft 321 is fixed to the end of the eccentric shaft 320 away from the transmission shaft 310. The axis of the eccentric drive shaft 321 is parallel to and non-coincident with the axis of the eccentric shaft 320. A reciprocating conversion bearing 322 is installed on the eccentric drive shaft 321. A reciprocating conversion groove 121 is provided at the end of the connecting handle 120 of the saw grinding cutter head 100 away from the substrate 110. The reciprocating conversion groove 121 is designed as a U-shaped structure, and the reciprocating conversion bearing 322 is movably installed in the reciprocating conversion groove 121.

[0061] By adopting the above technical solution, when the rotary power source drives the transmission shaft 310 to rotate, the eccentric drive shaft 321 and the reciprocating conversion bearing 322 can be driven by the eccentric shaft 320 to perform eccentric motion. When the reciprocating conversion bearing 322 continuously contacts the two sides of the reciprocating conversion groove 121, the saw grinding cutter head 100 can be driven to continuously perform reciprocating swinging motion, so as to realize the sawing and grinding operations of the saw grinding cutter head 100.

[0062] Actually, the driving assembly can also adopt a reciprocating driving assembly such as a crank and connecting rod mechanism to realize the reciprocating swinging motion of the saw grinding cutter head 100. The specific structure of the reciprocating driving assembly is prior art and will not be elaborated here in detail.

[0063] In this embodiment, the saw grinding tool further includes a cooling kit, and the cooling kit includes a spiral water cooling sleeve 410 and a rubber sleeve 420. Among them, the spiral water cooling sleeve 410 is sleeved on the outer side of the rear housing 230. An inlet 411, a spiral water groove 412 and an outlet 413 are sequentially communicated on the outer side wall of the spiral water cooling sleeve 410; the rubber sleeve 420 is sleeved on the outer side of the spiral water cooling sleeve 410, so as to form a first cooling water channel 430 between the inlet 411, the spiral water groove 412, the outlet 413 and the inner side wall of the rubber sleeve 420, and the cooling water can enter the first cooling water channel 430 from the inlet 411.

[0064] A first flat surface 241 is provided on the outer sidewall of the first sleeve 240. The outer tube body 220 is sleeved on the first sleeve 240, so that a second cooling water channel 440 is formed between the first flat surface 241 and the inner sidewall of the outer tube body 220. A through port 231 communicating the first cooling water channel 430 and the second cooling water channel 440 is provided on the rear housing 230.

[0065] A second flat surface 251 is provided on the outer sidewall of the second sleeve 250. The outer tube body 220 is sleeved on the second sleeve 250, so that a third cooling water channel 450 is formed between the second flat surface 251 and the inner sidewall of the outer tube body 220, and the other end communicates with the installation position 211 of the cutter head seat 210.

[0066] By adopting the above technical solution, the cooling water can flow through the first cooling water channel 430, the second cooling water channel 440 and the third cooling water channel 450, so as to cool down the transmission shaft 310 and the eccentric shaft 320 rotating at a high speed inside the housing; in addition, the cooling water can flow into the installation position 211 of the cutter head seat 210, so as to cool down the eccentric drive shaft 321, the reciprocating conversion bearing 322 and the reciprocating conversion groove 121; at the same time, the cooling water can finally be sprayed onto the bone tissue of the patient, so as to clean the sawing or grinding part, thereby assisting the implementation of the operation.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention. The technologies, shapes and structures not described in detail in the present invention are all well-known technologies.

Claims

1. A surgical saw sharpening head, characterized in that: The saw sharpening head (100) comprises: substrate(110); A connecting handle (120), wherein the connecting handle (120) is fixed to one end of the base plate (110); and A tooth portion (130), wherein the tooth portion (130) is fixed to an end of the base plate (110) away from the connecting handle (120), and a plurality of saw teeth (131) are arranged on the tooth portion (130).

2. The saw sharpening head according to claim 1, characterized in that: The edge of the sawing tooth (131) is designed with a continuous tooth blade (132), and the tooth blade (132) is distributed on the front and rear sides of the tooth portion (130) and the side away from the base plate (110).

3. The saw sharpening head (100) according to claim 2, characterized in that: The tooth edge (132) on the side away from the base plate (110) is designed as a circular arc transition structure (133).

4. The saw sharpening head according to any one of claims 1 to 3, characterized in that: The extension length of the saw teeth (131) in the middle portion away from one end of the base plate (110) is greater than the extension lengths of the saw teeth (131) at both sides.

5. The saw sharpening head according to any one of claims 1 to 3, characterized in that: A chip removal groove (134) is provided between two adjacent saw teeth (131).

6. The saw sharpening head according to claim 2 or 3, characterized in that: A projection line (135) of the tooth edge (132) projected onto the YOZ plane is obliquely arranged on an extended baseline (122) of the connection handle (120) projected onto the YOZ plane.

7. A sawing tool, characterized in that: The sawing tool comprises: case; The saw sharpening head (100) according to any one of claims 1 to 6, wherein the connecting handle (120) of the saw sharpening head (100) is hinged on the housing; and A driving assembly is installed in the housing and is used to drive the saw sharpening head (100) to reciprocate.

8. The sawing tool according to claim 7, characterized in that: The housing comprises a cutter head seat (210), an outer tube (220) and a rear housing (230) which are connected in sequence; An installation position (211) for installing a saw sharpening head (100) is provided at one end of the blade seat (210) away from the outer tube body (220), and a connecting handle (120) of the saw sharpening head (100) is hinged to the installation position (211) of the saw sharpening head (100) via a pin shaft (212).

9. The sawing tool according to claim 8, characterized in that: The driving assembly comprises a transmission shaft (310) and an eccentric shaft (320); A first sleeve (240) and a second sleeve (250) are installed in the housing, the transmission shaft (310) is installed in the first sleeve (240) via a bearing, and the eccentric shaft (320) is rotatably installed in the second sleeve (250) via a bearing; One end of the transmission shaft (310) is coaxially fixed to one end of the eccentric shaft (320), and the other end is used to connect to a rotational power source; An eccentric drive shaft (321) is fixed to one end of the eccentric shaft (320) away from the transmission shaft (310); the axis of the eccentric drive shaft (321) is parallel to and does not overlap with the axis of the eccentric shaft (320); and a reciprocating conversion bearing (322) is installed on the eccentric drive shaft (321); A reciprocating conversion groove (121) is provided at one end of the connecting handle (120) of the saw sharpening head (100) away from the base plate (110); the reciprocating conversion groove (121) is designed as a U-shaped structure; and the reciprocating conversion bearing (322) is movably installed in the reciprocating conversion groove (121).

10. The sawing tool according to claim 9, characterized in that: The sawing and grinding tool also includes a cooling kit, which includes a spiral water cooling jacket (410) and a rubber jacket (420); The spiral water cooling jacket (410) is sleeved on the outer side of the rear housing (230), and the outer side wall of the spiral water cooling jacket (410) is provided with a water inlet (411), a spiral water groove (412) and a water outlet (413) which are connected in sequence; The rubber sleeve (420) is sleeved on the outer side of the spiral water cooling sleeve (410), so that a first cooling water channel (430) is formed between the water inlet (411), the spiral water groove (412), the water outlet (413) and the inner side wall of the rubber sleeve (420); A first plane (241) is provided on the outer side wall of the first sleeve (240), and the outer tube body (220) is sleeved on the first sleeve (240), so that a second cooling water channel (440) is formed between the first plane (241) and the inner side wall of the outer tube body (220); The rear housing (230) is provided with a through opening (231) communicating with the first cooling water channel (430) and the second cooling water channel (440); A second plane (251) is provided on the outer wall of the second sleeve (250), and the outer tube body (220) is sleeved on the second sleeve (250) so that a third cooling water channel (450) is formed between the second plane (251) and the inner wall of the outer tube body (220), and one end of the third cooling water channel (450) is connected to the second cooling water channel (440), and the other end is connected to the mounting position (211) of the cutter head holder (210).

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