Swing saw blade, swing saw and surgical robot

Abstract

The utility model relates to a pendulum saw blade, pendulum saw and surgical robotic.The pendulum saw blade comprises a cutting part and a saw blade body, the cutting part comprises a first saw tooth row and a second saw tooth row which are arranged in the swinging direction of the saw blade body, the first saw tooth row and the second saw tooth row are arranged back to back, and the cutting directions of the first saw tooth row and the second saw tooth row are opposite; the cutter is characterized in that the first sawtooth row and the second sawtooth row each comprise first cutting teeth and second cutting teeth, the first cutting teeth and the second cutting teeth are each provided with a cutting face, and the intersecting lines of the cutting faces of the first cutting teeth and the horizontal plane and the intersecting lines of the cutting faces of the second cutting teeth and the horizontal plane are arranged at a first preset angle. The cutting capacity of the saw blade, the swing saw and the surgical robot can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical treatment, in particular to an oscillating saw blade, an oscillating saw and a surgical robot. Background Art

[0002] The human knee joint is one of the most easily damaged joints. Knee replacement can very effectively eradicate late-stage knee pain, correct knee deformities, improve knee function, and greatly improve the patient's quality of life.

[0003] Traditional knee replacement surgery uses an oscillating saw to remove the worn joint surface. With the development of technology, orthopedic surgical robots are increasingly used in total knee replacement. The teeth on the existing oscillating saw blades are all in a single row and arranged in a straight line, resulting in a weak cutting ability of the saw blade. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an oscillating saw blade, an oscillating saw and a surgical robot, which can improve the cutting ability.

[0005] On the one hand, the utility model provides an oscillating saw blade, comprising a cutting portion and a saw blade body, the cutting portion comprising a first saw tooth row and a second saw tooth row arranged along the swinging direction of the saw blade body, the first saw tooth row and the second saw tooth row being arranged back to back and having opposite cutting directions, the first saw tooth row and the second saw tooth row both comprising a first cutting tooth and a second cutting tooth, the first cutting tooth and the second cutting tooth both being provided with a cutting surface, the cutting surface of the first cutting tooth and the cutting surface of the second cutting tooth being arranged at a first preset angle to an intersection line with a horizontal plane.

[0006] In one embodiment of the present invention, the thickness of the first sawtooth row and the second sawtooth row is 1.5 mm to 2.5 mm, and the first cutting teeth and the second cutting teeth are plate-shaped teeth.

[0007] In one embodiment of the present invention, the cutting edges of the first cutting tooth and the second cutting tooth are both arranged at a second preset angle with respect to the horizontal plane.

[0008] In one embodiment of the present invention, the first cutting teeth and the second cutting teeth are arranged alternately along the swinging direction of the saw blade body.

[0009] In one embodiment of the utility model, the cutting part also includes a cutting part body, the cutting surface of the first cutting tooth is located on one side of the cutting part body, the cutting surface of the second cutting tooth is located on the other side of the cutting part body, the plane perpendicular to the swinging direction of the saw blade body is a reference plane, and the projections of the cutting surfaces of the first cutting tooth and the second cutting tooth on the reference plane have an overlapping area.

[0010] In one embodiment of the present invention, the saw blade body is connected to the cutting portion body, and the thickness of the cutting portion body is smaller than the thickness of the cutting portion, and smaller than the thickness of the saw blade body.

[0011] In one embodiment of the present invention, the tooth tips of the first cutting tooth and the second cutting tooth are both located on the same arc.

[0012] In one embodiment of the utility model, a heat dissipation hole is provided on the saw blade body, the heat dissipation hole is provided close to the cutting part, and the heat dissipation hole is a weight-reducing hole.

[0013] On the other hand, an oscillating saw is provided, comprising the oscillating saw blade described above.

[0014] On the other hand, a surgical robot is provided, comprising the above-mentioned oscillating saw.

[0015] The above technical solution of the utility model has the following advantages compared with the prior art:

[0016] The oscillating saw blade, oscillating saw and surgical robot described in the utility model are provided with cutting surfaces on the first cutting tooth and the second cutting tooth. Therefore, when cutting tissue, the cutting surface of the first cutting tooth cuts the tissue first and then the cutting surface of the second cutting tooth cuts the tissue. Since the intersection line of the cutting surface of the first cutting tooth and the cutting surface of the second cutting tooth with the horizontal plane is arranged at a first preset angle, the cutting angles when resecting the tissue are different, which can improve the cutting ability of the oscillating saw blade, oscillating saw and surgical robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

[0018] Figure 1 It is a structural schematic diagram of the oscillating saw blade of the utility model;

[0019] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0020] Figure 3 It is a structural schematic diagram of the cutting portion of the oscillating saw blade of the utility model;

[0021] Figure 4 It is a structural schematic diagram of a first preset angle of the oscillating saw blade of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the second preset angle of the oscillating saw blade of the utility model.

[0023] Description of the Figures in the Specification:

[0024] 1. Cutting part; 2. Saw blade body; 3. First sawtooth row; 4. Second sawtooth row; 5. First cutting tooth; 6. Second cutting tooth; 7. Cutting surface; 8. Cutting part body; 9. Connecting part; 10. Mounting groove; 11. Positioning hole; 12. Heat dissipation hole; 13. Positioning mechanism. DETAILED DESCRIPTION

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

[0026] Embodiment 1

[0027] Reference Figure 1 to Figure 5 As shown, the swing saw blade of the utility model comprises a cutting part 1 and a saw blade body 2, the cutting part 1 comprises a first saw tooth row 3 and a second saw tooth row 4 arranged along the swinging direction of the saw blade body 2, the first saw tooth row 3 and the second saw tooth row 4 are arranged back to back and have opposite cutting directions, the first saw tooth row 3 and the second saw tooth row 4 both comprise a first cutting tooth 5 and a second cutting tooth 6, the first cutting tooth 5 and the second cutting tooth 6 are both provided with a cutting surface 7, and the intersection line of the cutting surface 7 of the first cutting tooth 5 and the cutting surface 7 of the second cutting tooth 6 with the horizontal plane is arranged at a first preset angle.

[0028] The oscillating saw blade of the utility model comprises a cutting part 1 and a saw blade body 2 which are connected to each other. The saw blade body 2 extends in a strip shape in the longitudinal direction. The top of the saw blade body 2 is connected to the cutting part 1. The cutting part 1 is used for cutting tissue. The cutting part 1 comprises a first sawtooth row 3 and a second sawtooth row 4 arranged along the swinging direction of the saw blade body 2. The directions of the saw teeth in the first sawtooth row 3 are consistent. The directions of the saw teeth in the second sawtooth row 4 are consistent. The cutting directions of the first sawtooth row 3 and the second sawtooth row 4 are opposite. Specifically, the cutting directions of the first sawtooth row 3 and the second sawtooth row 4 are arranged back to back. The cutting part 1 is provided with two groups of sawtooth rows with different directions. One of the rows is used for cutting in the reciprocating process. Moreover, since the cutting directions of the first sawtooth row 3 and the second sawtooth row 4 are opposite and they are arranged back to back, compared with the traditional isosceles triangle teeth, the strength and the amount of bite are increased, thereby improving the cutting efficiency of the oscillating saw. Taking the left and right reciprocating swing of an oscillating saw as an example, the first row of teeth 3 is arranged on the left side of the saw blade body 2 and faces the left side, cutting to the left when working. The second row of teeth 4 is arranged on the right side of the saw blade body 2 and cutting to the right when working. The first row of teeth 3 and the second row of teeth 4 are mirror-symmetrical with respect to the longitudinal center line of the saw blade body 2, ensuring the consistency of the reciprocating cutting of the oscillating saw blade when working. In addition, cutting surfaces 7 are provided on both the first cutting tooth 5 and the second cutting tooth 6. Therefore, when cutting tissue, the cutting surface of the first cutting tooth 5 cuts the tissue first, and then the cutting surface of the second cutting tooth 6 cuts the tissue. Since the intersection line of the cutting surface of the first cutting tooth 5 and the cutting surface of the second cutting tooth 6 with the horizontal plane is set at a first preset angle, the cutting angle when the tissue is cut is different, which can reduce the cutting resistance and improve the cutting ability of the saw blade. Among them, the first preset angle α is 14° to 18°, preferably 16°, such as Figure 5 This application is in accordance with Figure 1 The directions shown are described up, down, left, and right. Figure 1 The orientation shown is with the oscillating saw blade positioned vertically.

[0029] In one embodiment, the thickness of the first sawtooth row 3 and the second sawtooth row 4 is 1.5 mm to 2.5 mm, and the first cutting teeth 5 and the second cutting teeth 6 are plate-shaped teeth.

[0030] In order to improve the rigidity of the oscillating saw blade, the thickness of the oscillating saw blade needs to be greatly increased, that is, the thickness of the first sawtooth row 3 and the second sawtooth row 4 is 1.5mm to 2.5mm, and preferably the thickness of the first sawtooth row 3 and the second sawtooth row 4 is 2mm. The saw teeth in the prior art are wedge-shaped, and the cutting ability of the middle part is weak. Since the oscillating saw blade of the present application is thickened to 2mm, this phenomenon is more obvious. The first cutting teeth 5 and the second cutting teeth 6 of the present application are plate-shaped teeth, that is, the root width of the cutting teeth is smaller than the thickness of the cutting teeth, such as Figure 3 As shown, the cutting ability of the oscillating saw blade in the entire thickness direction can be effectively improved.

[0031] In one embodiment, the cutting edges of the first cutting tooth 5 and the second cutting tooth 6 are both arranged at a second preset angle with respect to the horizontal plane.

[0032] like Figure 4 As shown, the cutting edges of the first cutting teeth 5 and the second cutting teeth 6 are both arranged at a second preset angle with the horizontal plane, and the angle β between the first cutting teeth 5 and the second cutting teeth 6 is 9° to 13°, preferably 11°, and the lamellar teeth with the second preset angle can further improve the cutting ability of the saw blade. In addition, the first cutting teeth 5 and the second cutting teeth 6 are lamellar teeth, the first cutting teeth 5 and the second cutting teeth 6 are arranged alternately, and the cutting edges of the first cutting teeth 5 and the second cutting teeth 6 are both arranged at a second preset angle with the horizontal plane, which greatly improves the cutting ability of the saw blade.

[0033] In one embodiment, the first cutting teeth 5 and the second cutting teeth 6 are arranged alternately along the swinging direction of the saw blade body 2 .

[0034] The first cutting teeth 5 and the second cutting teeth 6 are arranged alternately along the swing direction of the saw blade body 2. Figure 3 As shown, the first saw tooth row 3 on the left side, from left to right, is the first cutting tooth, the second cutting tooth, the first cutting tooth, the second cutting tooth, and the first cutting tooth, that is, the first cutting tooth 5 and the second cutting tooth 6 are arranged alternately in sequence, and under the premise that the intersection line of the cutting surface of the first cutting tooth 5 and the cutting surface of the second cutting tooth 6 with the horizontal plane is set at a first preset angle, the staggered first cutting tooth 5 and the second cutting tooth 6 can further improve the cutting ability of the saw blade, and the first cutting tooth 5 and the second cutting tooth 6 are lamellar teeth, which can further improve the cutting ability of the saw blade.

[0035] In one embodiment, the cutting part 1 includes a cutting part body 8, the cutting surface of the first cutting tooth 5 is located on one side of the cutting part body 8, the cutting surface of the second cutting tooth 6 is located on the other side of the cutting part body 8, and the plane perpendicular to the swinging direction of the saw blade body 2 is a reference plane, and the projections of the cutting surfaces of the first cutting tooth 5 and the second cutting tooth 6 on the reference plane have an overlapping area.

[0036] like Figure 3 As shown, the cutting portion 1 includes a cutting portion body 8, the first cutting teeth 5 and the second cutting teeth 6 are arranged alternately along the swing direction of the saw blade body 2, and the first cutting teeth 5 and the second cutting teeth 6 are located on different sides of the cutting portion body 8. Specifically, the cutting surface of the first cutting tooth 5 is located on one side of the cutting portion body 8, as shown in FIG. Figure 3 As shown in the left side, the cutting surface of the second cutting tooth 6 is located on the other side of the cutting part body 8, as shown in FIG. Figure 3The right side shown; further, a plane perpendicular to the swing direction of the saw blade body 2 is defined as a reference plane, and the projections of the cutting surface of the first cutting tooth 5 and the cutting surface of the second cutting tooth 6 on the reference plane have an overlapping area, which can ensure the continuity of the cutting tissue.

[0037] In one embodiment, the cutting portion 1 is connected to the saw blade body 2 via the cutting portion body 8 , and the thickness of the cutting portion body 8 is smaller than the thickness of the first saw tooth row 3 and smaller than the thickness of the saw blade body 2 .

[0038] like Figure 1 and Figure 2 As shown, the cutting portion 1 is connected to the saw blade body 2 through the cutting portion body 8. In order to reduce friction resistance and facilitate the discharge of bone chips, the thickness of the cutting portion body 8 is smaller than the thickness of the first saw tooth row 3 (the thickness of the first saw tooth row 3 and the second saw tooth row 4 is the same, which is equivalent to being smaller than the thickness of the second saw tooth row 4), and is smaller than the thickness of the saw blade body 2. In addition, the weight of the top of the saw blade body 2 can also be reduced, reducing the rotational inertia of the saw blade when it swings.

[0039] In one embodiment, the tooth tips of the first cutting tooth 5 and the second cutting tooth 6 are located on the same arc.

[0040] The first cutting teeth 5 and the second cutting teeth 6 are structures for realizing saw blade cutting. In order to ensure that the cutting teeth are evenly stressed during the operation of the swing saw blade, the first cutting teeth 5 and the second cutting teeth 6 are arranged in a circular arc, that is, during the swinging process, the tooth tips of all the cutting teeth are on a circular arc with the center of the swinging as the center.

[0041] In one embodiment, it further includes a connecting portion 9 , wherein the connecting portion 9 , the saw blade body 2 and the cutting portion 1 are connected in sequence, a mounting groove 10 is provided on the connecting portion 9 , and a plurality of positioning holes 11 are provided on the connecting portion 9 around the mounting groove 10 .

[0042] like Figure 1 As shown, the oscillating saw blade includes a connecting portion 9, a saw blade body 2 and a cutting portion 1, wherein the connecting portion 9 is arranged at the top of the saw blade body 2, and the cutting portion 1 is arranged at the bottom of the saw blade body 2, that is, the connecting portion 9, the saw blade body 2 and the cutting portion 1 are connected in sequence, and preferably, the connecting portion 9, the saw blade body 2 and the cutting portion 1 are integrally formed. The connecting portion 9 is used to install the oscillating saw blade with the power mobile phone interface, so as to drive the oscillating saw blade to swing back and forth through the power mobile phone interface to perform cutting work. Specifically, a mounting groove 10 is arranged on the connecting portion 9, and the mounting groove 10 is used for guiding and positioning during installation, so the mounting groove 10 can be a U-shaped groove, a rectangular groove, a trapezoidal groove or the like; in addition, a plurality of positioning holes 11 are arranged around the mounting groove 10 on the connecting portion 9, and the installation and positioning of the oscillating saw blade and the power mobile phone interface are realized through the mounting groove 10 and the positioning holes 11.

[0043] In one embodiment, a heat dissipation hole 12 is provided on the saw blade body 2 . The heat dissipation hole 12 is provided close to the cutting part 1 , and the heat dissipation hole 12 is a weight-reducing hole.

[0044] The saw blade of the oscillating saw will generate a lot of heat during normal operation. Therefore, in order to facilitate the heat dissipation of the saw blade, a heat dissipation hole 12 is provided on the saw blade body 2, and the heat dissipation hole 12 is provided close to the cutting part 1. Figure 1 As shown, the heat dissipation hole 12 is close to the part with large heat dissipation, which is convenient for timely heat dissipation. In addition, the heat dissipation hole 12 is also a weight reduction hole. After the oscillating saw blade is thickened, the overall mass increases, and the oscillating saw blade is mostly reciprocating at a high frequency (10KKz-20KKz) during use. The excessive mass produces excessive inertia, which will cause excessive impact noise in the power mobile phone fork structure. The setting of the weight reduction hole can reduce the mass of the front end of the saw blade and effectively reduce the rotational inertia of the oscillating saw blade, thus playing a dual role of heat dissipation and weight reduction.

[0045] In one embodiment, a positioning mechanism 13 is disposed on the saw blade body 2 .

[0046] In order to facilitate the positioning of the oscillating saw blade by the surgical robot system, the relative position of the oscillating saw blade is obtained, such as Figure 1 As shown, a positioning mechanism 13 is provided on the saw blade body 2 of the oscillating saw blade. The positioning mechanism 13 may be a hole or a groove.

[0047] Embodiment 2

[0048] An oscillating saw is provided, comprising the above-mentioned oscillating saw blade, the oscillating saw blade comprising a cutting portion 1 and a saw blade body 2, the cutting portion 1 comprising a first saw tooth row 3 and a second saw tooth row 4 arranged along the swinging direction of the saw blade body 2, the first saw tooth row 3 and the second saw tooth row 4 are arranged back to back and have opposite cutting directions, the first saw tooth row 3 and the second saw tooth row 4 both comprise a first cutting tooth 5 and a second cutting tooth 6, the first cutting tooth 5 and the second cutting tooth 6 are both provided with a cutting surface 7, and the intersection line of the cutting surface 7 of the first cutting tooth 5 and the cutting surface 7 of the second cutting tooth 6 with the horizontal plane is arranged at a first preset angle.

[0049] When cutting tissue, the cutting surface of the first cutting tooth 5 cuts the tissue first, and then the cutting surface of the second cutting tooth 6 cuts the tissue. Since the intersection line of the cutting surface of the first cutting tooth 5 and the cutting surface of the second cutting tooth 6 with the horizontal plane is set at a first preset angle, the cutting angles when the tissue is resected are different, which can reduce the cutting resistance, so as to improve the cutting ability of the saw blade, further improve the maneuverability of the oscillating saw, and improve the cutting efficiency of the oscillating saw on bone tissue.

[0050] Embodiment 3

[0051] A surgical robot is provided, comprising the above-mentioned oscillating saw, the oscillating saw comprising an oscillating saw blade, the oscillating saw blade comprising a cutting portion 1 and a saw blade body 2, the cutting portion 1 comprising a first saw tooth row 3 and a second saw tooth row 4 arranged along the swinging direction of the saw blade body 2, the first saw tooth row 3 and the second saw tooth row 4 being arranged back to back and having opposite cutting directions, the first saw tooth row 3 and the second saw tooth row 4 both comprising a first cutting tooth 5 and a second cutting tooth 6, the first cutting tooth 5 and the second cutting tooth 6 both being provided with a cutting surface 7, the cutting surface 7 of the first cutting tooth 5 and the cutting surface 7 of the second cutting tooth 6 being arranged at a first preset angle with the intersection line of the horizontal plane.

[0052] When cutting tissue, the cutting surface of the first cutting tooth 5 cuts the tissue first, and then the cutting surface of the second cutting tooth 6 cuts the tissue. Since the intersection lines of the cutting surfaces of the first cutting tooth 5 and the second cutting tooth 6 with the horizontal plane are set at a first preset angle, the cutting angles when the tissue is resected are different, which can reduce the cutting resistance, so as to improve the cutting ability of the oscillating saw blade, further improve the maneuverability of the oscillating saw, improve the cutting efficiency of the oscillating saw on bone tissue, and ultimately improve the working efficiency of the surgical robot.

[0053] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A swing saw blade, characterized in that: The saw blade comprises a cutting portion (1) and a saw blade body (2). The cutting portion (1) comprises a first saw tooth row (3) and a second saw tooth row (4) arranged along the swinging direction of the saw blade body (2). The first saw tooth row (3) and the second saw tooth row (4) are arranged back to back and have opposite cutting directions. The first saw tooth row (3) and the second saw tooth row (4) both comprise a first cutting tooth (5) and a second cutting tooth (6). The first cutting tooth (5) and the second cutting tooth (6) are both provided with a cutting surface (7). The intersection line of the cutting surface of the first cutting tooth (5) and the cutting surface of the second cutting tooth (6) with a horizontal plane is arranged at a first preset angle. The first cutting tooth (5) and the second cutting tooth (6) are plate-shaped teeth. The first saw tooth row (3) is arranged on the left part of the saw blade body (2) and faces the left side. When working, it cuts to the left. When working, the second saw tooth row (4) is arranged on the right part of the saw blade body (2) and faces the right side. When working, it cuts to the right.

2. The oscillating saw blade according to claim 1, characterized in that: The thickness of the first sawtooth row (3) and the second sawtooth row (4) is 1.5 mm to 2.5 mm.

3. The oscillating saw blade according to claim 1, characterized in that: The cutting edges of the first cutting tooth (5) and the second cutting tooth (6) are both arranged at a second preset angle with respect to the horizontal plane.

4. The oscillating saw blade according to claim 1, characterized in that: The first cutting teeth (5) and the second cutting teeth (6) are arranged alternately along the swinging direction of the saw blade body (2).

5. The oscillating saw blade according to claim 4, characterized in that: The cutting portion (1) also includes a cutting portion body (8), the cutting surface of the first cutting tooth (5) is located on one side of the cutting portion body (8), and the cutting surface of the second cutting tooth (6) is located on the other side of the cutting portion body (8). A plane perpendicular to the swinging direction of the saw blade body (2) is a reference plane, and projections of the cutting surface of the first cutting tooth (5) and the cutting surface of the second cutting tooth (6) on the reference plane have an overlapping area.

6. The oscillating saw blade according to claim 5, characterized in that: The saw blade body (2) is connected to the cutting part body (8), and the thickness of the cutting part body (8) is smaller than the thickness of the first saw tooth row (3), and smaller than the thickness of the saw blade body (2).

7. The oscillating saw blade according to claim 1, characterized in that: The tooth tips of the first cutting tooth (5) and the second cutting tooth (6) are both located on the same circular arc.

8. The oscillating saw blade according to any one of claims 1 to 7, characterized in that: The saw blade body (2) is provided with a heat dissipation hole (12), the heat dissipation hole (12) is arranged close to the cutting portion (1), and the heat dissipation hole (12) is a weight-reducing hole.

9. An oscillating saw, characterized in that: It comprises the oscillating saw blade as described in any one of claims 1 to 8.

10. A surgical robot, characterized in that: Comprising the oscillating saw as claimed in claim 9.

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