Sawtooth blade and bone saw

Abstract

The utility model relates to the technical field of medical instruments, in particular to a sawtooth blade and a bone saw, the sawtooth blade comprises a saw blade and sawteeth, the sawteeth are installed at one end of the saw blade, the maximum width size of the sawteeth in the first direction is larger than the width size of the saw blade in the first direction, and the first direction is the direction along the thickness of the saw blade; the saw teeth comprise a plurality of tooth assemblies, each tooth assembly comprises two saw grinding teeth which are oppositely arranged, and a first chip groove is formed between the two saw grinding teeth of the same tooth assembly. According to the sawtooth blade, saw cutting is achieved in a back-and-forth swinging mode, part of tissue fines generated by saw cutting can enter the first chip discharging grooves, under the action of centrifugal force generated by back-and-forth swinging, the tissue fines in the first chip discharging grooves are thrown out to be separated from the first chip discharging grooves, accumulation of the tissue fines is avoided, and the saw cutting efficiency and effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a saw blade and a bone saw. Background Art

[0002] In surgeries involving bones, it is often necessary to operate on the patient's bones. Some surgeries require sawing off the patient's bones. When sawing off the patient's bones, a bone saw is needed. Traditional bone saws are divided into handheld manual and handheld electric types. In order to speed up the operation, handheld electric bone saws are generally used.

[0003] The saw blades of existing bone saws generally use traditional single-row teeth. During the back-and-forth sawing process, tissue debris generated by sawing tends to accumulate, affecting the sawing efficiency and effect. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a saw blade and a bone saw, so as to at least solve the problem that fine tissue chips are easily accumulated during the sawing process of the existing bone saw blade, thereby affecting the sawing efficiency and effect.

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

[0006] In a first aspect, the present invention provides a sawtooth blade, comprising:

[0007] saw blades;

[0008] a saw tooth fixedly mounted on one end of the saw blade, wherein the maximum width of the saw tooth in a first direction is greater than the width of the saw blade in the first direction, wherein the first direction is a direction along the thickness of the saw blade;

[0009] The saw teeth include several groups of tooth assemblies, each of which includes two saw teeth arranged opposite to each other, and a first chip removal groove is provided between the two saw teeth in the same group of tooth assemblies.

[0010] In combination with the first aspect, in some embodiments, the saw teeth extend from one side of the saw blade to the other side, and form arc-shaped transition teeth at the end of the saw blade to constitute the tooth tips.

[0011] In combination with the first aspect, in some embodiments, the thickness of the saw tooth is a gradient structure that gradually increases from the edge toward the saw blade, the edge of the saw tooth with the smallest thickness constitutes the tooth edge, and a first V-shaped chip groove is formed between two saw teeth in the same group of tooth assemblies.

[0012] In combination with the first aspect, in some embodiments, the width dimension of the tooth tip in the first direction is smaller than the maximum width dimension of the saw tooth in the first direction.

[0013] In combination with the first aspect, in some embodiments, several groups of the tooth assemblies are fixed at an end portion of the saw blade at equal distances, and a second chip removal groove is provided between two adjacent tooth assemblies.

[0014] In combination with the first aspect, in some embodiments, several groups of the tooth assemblies are installed at one end of the saw blade in an arc shape with equal distances.

[0015] The saw blade of the present invention uses a back-and-forth swinging method to achieve sawing. Some of the tissue debris generated by sawing will enter the first chip groove. Under the action of the centrifugal force generated by the back-and-forth swinging, the tissue debris in the first chip groove is thrown out of the first chip groove, avoiding the accumulation of tissue debris and improving the sawing efficiency and effect. In the present invention, the maximum width dimension of the saw teeth in the first direction is greater than the width dimension of the saw blade in the first direction, that is, the maximum width dimension of the saw teeth is greater than the thickness dimension of the saw blade, and it is not easy to get stuck during the bone sawing process. In the saw blade of the present invention, the width dimension of the tooth tip that first contacts the sawed bone tissue is smaller than the maximum width dimension of the saw teeth. When the doctor uses it, at the moment when the sawed bone tissue is cut through or cut off, the wider part of the saw teeth will be stuck at the incision and will not be pressed down by inertia, which can effectively avoid damage to other tissues.

[0016] In a second aspect, the present invention further provides a bone saw, comprising the saw blade as described in the first aspect above.

[0017] In conjunction with the second aspect, in some embodiments, the bone saw further comprises:

[0018] a shift fork, mounted on an end of the saw blade away from the saw teeth, wherein a first bearing is mounted in the shift fork;

[0019] A transmission shaft, comprising a main shaft and an eccentric shaft mounted at one end of the main shaft, the eccentric shaft being eccentrically arranged relative to the main shaft, the other end of the main shaft being transmission-connected to a motor, and the eccentric shaft being inserted into a first bearing;

[0020] Mounting base, used for mounting serrated blades.

[0021] In combination with the second aspect, in some embodiments, the mounting seat has a mounting groove, and a pin is provided on the groove walls on opposite sides of the mounting groove. The saw blade is inserted into the mounting groove, and the pin penetrates the saw blade.

[0022] In combination with the second aspect, in some embodiments, the bone saw further comprises an outer tube, a support tube, an outer shell and an anti-slip sleeve, the support tube and the outer tube being inserted into the outer shell, the support tube being sleeved on the main shaft, the outer tube being sleeved on the support tube, and the gap between the inner wall of the outer tube and the outer wall of the support tube constituting a water injection channel; the end of the outer tube close to the saw blade is inserted into the mounting seat, the end of the main shaft close to the saw blade is sleeved with a bearing seat, a second bearing and a third bearing are installed between the bearing seat and the main shaft, and the second bearing and the third bearing are respectively located at opposite ends of the bearing seat; a spiral water cooling jacket is provided inside the anti-slip sleeve, the spiral water cooling jacket is sleeved on one end of the outer shell, a spiral channel is provided on the circumferential outer wall of the spiral water cooling jacket, the end of the spiral water cooling jacket close to the saw blade has a notch, the notch is communicated with the spiral channel, the outer shell has a water injection hole at the position corresponding to the notch, the notch is communicated with the water injection hole, and the water injection hole is communicated with the water injection channel; the end of the main shaft away from the saw blade is connected to an input shaft, and the input shaft is connected to an external motor.

[0023] This new bone saw utilizes a saw blade with narrow tips and wide roots. When bone tissue is cut through or severed, the wider roots become lodged in the incision, preventing downward pressure due to inertia and effectively preventing damage to other tissue. Furthermore, the design of the primary and secondary chip removal grooves prevents the accumulation of fine chips, improving sawing efficiency.

[0024] In this bone saw, an external motor drives the main shaft to rotate, causing the eccentric shaft to rotate eccentrically with it, driving the first bearing to slide within the fork of the shift fork, thereby driving the shift fork to move back and forth, and in turn driving the saw blade to swing back and forth, sawing bone tissue. The shift fork is mounted on the saw blade, which facilitates the effective transmission of the reciprocating swing to the saw blade, thereby improving sawing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of a sawtooth piece of the utility model;

[0026] Figure 2 It is a cross-sectional view of the bone saw of the present utility model;

[0027] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 4 It is a structural schematic diagram of the bone saw of the present utility model;

[0029] Figure 5 It is an enlarged structural diagram of the transmission shaft;

[0030] Figure 6 It is an enlarged structural diagram of the spiral water cooling jacket;

[0031] Among them, the saw blade 110, the saw teeth 120, the tooth tip 121, the tooth root 122, the saw grinding tooth 123, the tooth edge 124, the first chip groove 125, the second chip groove 130, the shift fork 210, the transmission shaft 220, the main shaft 221, the eccentric shaft 222, the mounting seat 230, the first bearing 241, the second bearing 242, the third bearing 243, the fourth bearing 244, the input shaft 250, the pin 260, the outer tube 271, the support tube 272, the outer shell 273, the water injection hole 2731, the anti-slip sleeve 274, the bearing seat 280, the spiral water cooling jacket 290, the spiral channel 291, and the notch 292. DETAILED DESCRIPTION

[0032] 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 content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and are only schematic diagrams, not actual drawings. They should not be understood as limiting 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 dimensions of the actual product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the figures.

[0033] 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 "up", "down", "left", "right", "front", "back", etc. indicate directions or positional relationships, they are based on the directions or positional relationships shown in the figures. This is only for the convenience of describing the present invention and simplifying the description, and does 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.

[0034] Please refer to Figure 1-6 :

[0035] The present invention provides a sawtooth blade comprising a saw blade 110 and saw teeth 120. The saw teeth 120 are fixedly mounted at one end of the saw blade 110. The maximum width of the saw teeth 120 in a first direction is greater than the width of the saw blade 110 in the first direction. The first direction is along the thickness of the saw blade 110. The saw teeth 120 include a plurality of tooth assemblies, which are equidistantly mounted on the saw blade 110. The tooth assemblies include two saw teeth 123, which are arranged opposite each other. A first chip removal groove 125 is defined between the two saw teeth 123 in the same tooth assembly.

[0036] The saw blade employing the above-described technical solution achieves sawing by means of a back-and-forth oscillating motion. Some of the tissue debris generated by sawing will enter the first chip removal groove 125. Under the centrifugal force generated by the back-and-forth oscillation, the tissue debris in the first chip removal groove 125 is ejected from the first chip removal groove 125, thereby preventing the accumulation of tissue debris and improving sawing efficiency and effectiveness. The maximum width of the saw teeth 120 in the first direction is greater than the width of the saw blade 110 in the first direction, that is, the maximum width of the saw teeth 120 is greater than the thickness of the saw blade 110, which reduces the risk of jamming during bone sawing.

[0037] The grinding teeth 123 extend from one side of the saw blade 110 to the other, forming an arc-shaped transition tooth at the end of the saw blade 110 to form a tooth tip 121. The thickness of the grinding teeth 123 gradually increases from the edge toward the saw blade 110. The edge of the grinding tooth 123 with the smallest thickness forms the tooth edge 124. The tooth tip 121 is part of the tooth edge. A first V-shaped chip removal groove 125 is formed between two grinding teeth 123 in the same tooth assembly. This design of the tooth tip 121 and tooth edge 124 further improves sawing efficiency and produces a smoother sawing cut.

[0038] In this embodiment, the width dimension of the tooth root 122 is also greater than the thickness dimension of the saw blade 110, and the positions of the tooth tip 121 and the tooth root 122 are relative, respectively located at the opposite ends of the saw tooth 120, that is, the tooth tip 121 is the tip of the saw tooth 120, and the tooth root 122 is the other end opposite to the tip of the saw tooth 120.

[0039] The width of the tooth tip 121 of the saw tooth 120 in the first direction is smaller than the maximum width of the saw tooth 120 in the first direction. The width of the tooth tip 121 that first contacts the bone tissue is smaller than the width of the saw tooth. When the doctor is using the saw, at the moment when the bone tissue is cut through or severed, the widest part of the saw tooth 120 will be stuck in the incision and will not be pressed down by inertia, which can effectively avoid causing damage to other tissues.

[0040] Several tooth assemblies are equidistantly fixed to one end of the saw blade 110, with a second chip flute 130 between adjacent tooth assemblies. The second chip flute 130 removes the fine chips generated by the reciprocating swinging motion during bone cutting, further preventing accumulation that affects the sawing effect.

[0041] Several groups of tooth assemblies are equidistantly arranged in an arc shape at one end of the saw blade 110. Several tooth assemblies arranged in an arc shape are beneficial to improving sawing efficiency and are convenient for doctors to operate and use.

[0042] The present invention also provides a bone saw comprising a saw blade as described in the above embodiment. The bone saw further comprises a shift fork 210, a transmission shaft 220, and a mounting base 230. The shift fork 210 is mounted on the end of the saw blade 110 away from the teeth 120. A first bearing 241 is mounted within the shift fork 210, with the outer wall of the first bearing 241 abutting against the inner wall of the fork opening of the shift fork 210. The transmission shaft 220 comprises a main shaft 221 and an eccentric shaft 222 mounted at one end of the main shaft 221. The eccentric shaft 222 is eccentrically disposed relative to the main shaft 221. The other end of the main shaft 221 is drive-connected to a motor. The eccentric shaft 222 is inserted into the first bearing 241. The mounting base 230 is used to mount the saw blade.

[0043] The main shaft 221 is connected to an external motor via an input shaft 250. When the external motor is started, the motor drives the main shaft 221 to rotate. The eccentric shaft 222 rotates eccentrically with the main shaft 221, driving the first bearing 241 to slide within the fork of the shift fork 210. This in turn drives the shift fork 210 to reciprocate, and in turn drives the saw blade 110 to oscillate back and forth, thereby sawing bone tissue. The shift fork 210 is mounted on the saw blade 110, which facilitates the effective transmission of the reciprocating oscillation to the saw blade 110, thereby improving sawing efficiency.

[0044] In this embodiment, the mounting base 230 has a mounting groove, and the groove walls on opposite sides of the mounting groove are penetrated by pins 260. The saw blade 110 is inserted into the mounting groove, and the pins 260 penetrate the saw blade 110. The saw teeth 120 are rotatably mounted on the mounting groove through the pins 260.

[0045] In this embodiment, the bone saw further comprises an outer tube 271, a support tube 272, a housing 273, and an anti-slip sleeve 274. Both the support tube 272 and the outer tube 271 are inserted into the housing 273. The support tube 272 is sleeved onto the spindle 221, and the outer tube 271 is sleeved onto the support tube 272. The gap between the inner wall of the outer tube 271 and the outer wall of the support tube 272 forms a water injection channel. The outer wall of the support tube 272 has flattened edges, creating a larger channel between the flattened edges and the inner wall of the outer tube 271, further facilitating water injection.

[0046] The end of the outer tube 271 closest to the saw blade 110 is inserted into the mounting base 230. A bearing seat 280 is mounted on the end of the spindle 221 closest to the saw blade 110. The end of the bearing seat 280, away from the saw blade 110, is inserted into the support tube 272. A gap is also defined between the bearing seat 2810 and the outer tube 271, which communicates with the water injection channel. A cavity is defined within the mounting base 230. One end of this cavity is open to facilitate water injection for flushing and cooling the sawing area. The other end of this cavity communicates with the gap between the bearing seat 280 and the outer tube 271.

[0047] A second bearing 242 and a third bearing 243 are mounted between the bearing seat and the spindle 221. The second bearing 242 and the third bearing 243 are located at opposite ends of the bearing seat 280. A spiral water-cooling jacket 290 is positioned within the anti-slip sleeve 274. The spiral water-cooling jacket 290 is mounted on one end of the outer shell 273. The outer wall of the spiral water-cooling jacket 290 has a spiral channel 291 connected to an external water injection mechanism for injecting water into the bone saw. Water then flows out through the end of the mounting seat 230 near the teeth 120, flushing and cooling the sawing area. The spiral water-cooling jacket 290 has a notch 292 at one end close to the saw blade 110, and the notch 292 is connected to the spiral channel 291. The outer shell 273 has a water injection hole 2731 at a position corresponding to the notch 292, and the notch 292 is connected to the water injection hole 2731, and the water injection hole 2731 is connected to the water injection channel. Specifically, a water injection cavity is provided inside the outer shell 273, and the water injection channel and the water injection hole 2731 are both connected to the water injection cavity.

[0048] Water is injected into the spiral channel 291 through the outer wall water injection mechanism. The injected water flows through the spiral channel 291, the notch 292, the water injection hole 2731, and the water injection cavity to the water injection channel, and then flows through the water injection channel to the gap between the bearing seat and the outer tube 271, and then flows into the mounting seat 230, and flows out from the end of the mounting seat 230 close to the saw tooth 120.

[0049] In this embodiment, the end of the spindle 221 away from the saw blade 110 is connected to the input shaft 250, which is connected to the external motor. The end of the spindle 221 away from the saw blade 110 is sleeved with a fourth bearing 244, which is located in the support tube 272.

[0050] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalent substitutions shall be encompassed by the claims of the present invention. The techniques, shapes, and structural portions not described in detail in the present invention are well known.

Claims

1. A sawtooth blade, characterized in that: include: saw blades; a saw tooth fixedly mounted on one end of the saw blade, wherein the maximum width of the saw tooth in a first direction is greater than the width of the saw blade in the first direction, wherein the first direction is a direction along the thickness of the saw blade; The saw teeth include several groups of tooth assemblies, each of which includes two saw teeth arranged opposite to each other, and a first chip removal groove is provided between the two saw teeth in the same group of tooth assemblies.

2. A serrated blade according to claim 1, characterized in that: The saw teeth extend from one side of the saw blade to the other side, and arc-shaped transition teeth are formed at the end of the saw blade to constitute tooth tips.

3. A serrated blade according to claim 2, characterized in that: The thickness of the saw teeth is a gradual structure that gradually increases from the edge to the direction close to the saw blade. The edge of the saw teeth with the smallest thickness constitutes the tooth edge, and a first V-shaped chip groove is formed between two saw teeth in the same group of tooth components.

4. The serrated blade according to claim 2, characterized in that: The width of the tooth tip in the first direction is smaller than the maximum width of the saw tooth in the first direction.

5. The serrated blade according to claim 1, characterized in that: A plurality of groups of tooth assemblies are fixed at an end portion of the saw blade at equal distances, and a second chip removal groove is provided between two adjacent tooth assemblies.

6. The serrated blade according to claim 1, characterized in that: A plurality of groups of tooth assemblies are arranged at equal distances and in an arc shape at one end of the saw blade.

7. A bone saw, characterized in that The bone saw comprises a saw blade as described in any one of claims 1-6.

8. The bone saw according to claim 7, characterized in that The bone saw further comprises: a shift fork, mounted on an end of the saw blade away from the saw teeth, wherein a first bearing is mounted in the shift fork; A transmission shaft, comprising a main shaft and an eccentric shaft mounted at one end of the main shaft, the eccentric shaft being eccentrically arranged relative to the main shaft, the other end of the main shaft being transmission-connected to a motor, and the eccentric shaft being inserted into a first bearing; Mounting base, used for mounting serrated blades.

9. The bone saw according to claim 8, characterized in that The mounting seat has a mounting groove, and the groove walls on two opposite sides of the mounting groove are penetrated by pin shafts. The saw blade is inserted into the mounting groove, and the pin shaft penetrates the saw blade.

10. The bone saw according to claim 8, characterized in that The bone saw further comprises an outer tube, a support tube, an outer shell and an anti-slip sleeve, the support tube and the outer tube being inserted into the outer shell, the support tube being sleeved on the main shaft, the outer tube being sleeved on the support tube, and the gap between the inner wall of the outer tube and the outer wall of the support tube forming a water injection channel; the end of the outer tube close to the saw blade is inserted into the mounting seat, the end of the main shaft close to the saw blade is sleeved with a bearing seat, a second bearing and a third bearing are installed between the bearing seat and the main shaft, and the second bearing and the third bearing are respectively located at opposite ends of the bearing seat; The anti-slip sleeve has a spiral water cooling jacket inside, and the spiral water cooling jacket is arranged on one end of the shell. The outer circumferential wall of the spiral water cooling jacket has a spiral channel. The end of the spiral water cooling jacket close to the saw blade has a notch, and the notch is connected to the spiral channel. The shell has a water injection hole at a position corresponding to the notch, and the notch is connected to the water injection hole, and the water injection hole is connected to the water injection channel. An input shaft is connected to one end of the main shaft away from the saw blade, and the input shaft is connected to an external motor.

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