Medical swing saw and medical surgical tool

Abstract

The utility model provides a medical swing saw and a medical surgical tool. The medical swing saw comprises a shell, a swing saw blade and a swing saw blade, the driving assembly comprises a driving structure, a power output shaft arranged on the driving structure and an eccentric shaft arranged on the power output shaft, the driving structure is arranged on the shell, the power output shaft is used for outputting power of the driving structure, the eccentric shaft is arranged to deviate from the axis of the power output shaft, and the eccentric shaft is driven by the power output shaft to rotate around the power output shaft; the mounting assembly comprises a mounting shaft arranged on the shell, and the mounting shaft and the eccentric shaft are arranged in parallel at an interval; saw teeth, a mounting hole and a power groove are arranged on the saw blade, the mounting hole is sleeved with the mounting shaft, and the power groove is sleeved with the eccentric shaft; the saw blade rotates around the mounting shaft in a reciprocating mode when the eccentric shaft rotates around the power output shaft. By the adoption of the technical scheme, the influence on saw cutting precision is reduced, and energy consumption of the swing saw is reduced; in addition, the swing saw is light, small in vibration and convenient for doctors to use.

Description

Technical Field

[0001] The utility model relates to the technical field of medical surgical tools, and more particularly to a medical oscillating saw and a medical surgical tool. Background Art

[0002] A medical oscillating saw is a bone-cutting tool widely used in orthopedic surgery. When the saw is operating, the blade oscillates back and forth at a high frequency and in small amplitudes, cutting through the bone.

[0003] The transmission structure of existing oscillating saws primarily consists of an eccentric (or cam), a pendulum rod, and a pendulum shaft. The pendulum rod's rear end is U-shaped and fits over the eccentric. When the eccentric rotates at high speed, the distal point alternately contacts the two branches of the pendulum rod's U-shape, pushing the pendulum rod back and forth. The front end of the pendulum rod is fixed to the pendulum shaft, driving the shaft to rotate back and forth at high frequencies and small angles, converting rotational motion into reciprocating oscillatory motion. In this structure, because the center of mass of the eccentric and pendulum rod are not aligned with the axis of rotation, high-speed rotation can easily generate vibration, affecting surgical precision. To reduce vibration, the pendulum shaft's mass can be increased and the length of the pendulum rod reduced, bringing the combined center of mass of the pendulum rod and shaft closer to the axis of rotation.

[0004] However, since the swing shaft is located at the front end of the swing saw, the above design increases the weight, making the swing saw top-heavy and difficult to hold. At the same time, since the swing shaft is heavy, the motor needs to output a larger driving force to swing the fork, which increases the energy consumption of the swing saw. Utility Model Content

[0005] The purpose of the utility model is to provide a medical oscillating saw and a medical surgical tool to solve the technical problems in the prior art that the center of gravity of the oscillating saw is far away from the user's hand, which is not conducive to operation and causes high energy consumption.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] In a first aspect, a medical oscillating saw is provided, comprising:

[0008] case;

[0009] A drive assembly comprising a drive structure, a power output shaft provided on the drive structure, and an eccentric shaft provided on the power output shaft, wherein the drive structure is provided on the housing, the power output shaft is used to output power from the drive structure, the eccentric shaft is provided offset from the axis of the power output shaft, and the eccentric shaft rotates around the power output shaft under the drive of the power output shaft;

[0010] A mounting assembly includes a mounting shaft provided on the housing, wherein the mounting shaft is parallel to and spaced from the eccentric shaft;

[0011] A saw blade, wherein the saw blade is provided with saw teeth, a mounting hole and a power slot, the saw teeth and the power slot are respectively arranged at both ends of the saw blade, the mounting hole is located between the saw teeth and the power slot, the mounting hole is sleeved with the mounting shaft, and the power slot is sleeved with the eccentric shaft; wherein the saw blade reciprocates around the mounting shaft when the eccentric shaft rotates around the power output shaft.

[0012] By adopting the above technical solution, a power slot is integrated on the saw blade, so that the power of the drive structure, power output shaft and eccentric shaft directly acts on the saw blade, retaining the transmission effect that can convert rotational motion into reciprocating pendulum motion; the transmission structure that is prone to vibration in traditional oscillating saws is simplified, reducing vibration and noise, and reducing the impact on sawing accuracy; the drive structure drives the eccentric shaft to act directly on the saw blade, reducing the energy consumption of the oscillating saw; in addition, the oscillating saw is light and has low vibration, making it easy for doctors to use.

[0013] In one embodiment, the mounting assembly further includes a press-fitting block coaxially arranged on the top of the mounting shaft, the axial projection dimension of the press-fitting block is larger than the axial projection dimension of the mounting shaft, the mounting hole includes a first hole portion and a second hole portion connected to the first hole portion, the first hole portion is sleeved with the mounting shaft, and the aperture of the second hole portion is larger than the axial projection dimension of the press-fitting block.

[0014] By adopting the above technical solution, the disassembly and assembly of the saw blade is facilitated.

[0015] In one embodiment, the mounting assembly further comprises a trigger structure for driving the pressing block to press the saw blade onto the housing, and the trigger structure is in driving connection with the mounting shaft.

[0016] By adopting the above technical solution, the mounting hole and the power slot can be installed in place, which is beneficial to improving the reliability of the saw blade during installation.

[0017] In one embodiment, the trigger structure is a rotating knob connected to the installation shaft, and the rotating knob is used to rotate the installation shaft to drive the installation shaft to move axially.

[0018] By adopting the above technical solution, the rotating knob is easy to operate, which improves the operational convenience of the assembler.

[0019] In one embodiment, a first step and a second step are provided on the housing in parallel and at intervals, the mounting shaft passes through the first step, the eccentric shaft passes through the second step, and the saw blade is connected to the first step and the second step respectively.

[0020] By adopting the above technical solution, the installation of the saw blade is facilitated.

[0021] In one embodiment, the mounting assembly further includes a first elastic structure connecting the trigger structure and the mounting shaft, wherein the first elastic structure is used to drive the press block to press the saw blade.

[0022] By adopting the above technical solution, the reliability of saw blade installation is improved.

[0023] In one embodiment, the mounting assembly further comprises a second elastic structure connecting the trigger structure and the mounting shaft, wherein the second elastic structure is used to drive the press block to separate from the saw blade.

[0024] By adopting the above technical solution, the reliability of saw blade installation is improved.

[0025] In one embodiment, the power groove is a U-shaped groove, and the notch of the power groove is arranged in a direction away from the installation axis.

[0026] By adopting the above technical solution, the installation of the power tank is facilitated.

[0027] In one embodiment, the slot of the power slot gradually expands in a direction away from the installation axis.

[0028] By adopting the above technical solution, the notch of the power groove is gradually expanded, which is conducive to docking with the eccentric shaft.

[0029] In a second aspect, a medical surgical tool is provided, comprising a medical surgical tool body and the above-mentioned medical oscillating saw, wherein the medical oscillating saw is arranged on the medical surgical tool body.

[0030] By adopting the above technical solution, in addition to the advantages of the medical oscillating saw of the above embodiment, the medical surgical tool of this embodiment also has the advantage of being easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 It is a three-dimensional structural diagram of a medical oscillating saw provided by an embodiment of the utility model.

[0033] Figure 2 It is an exploded view of the medical oscillating saw provided by an embodiment of the present utility model.

[0034] Figure 3 It is a cross-sectional view of a medical oscillating saw provided by an embodiment of the present utility model.

[0035] The reference numerals in the figures are:

[0036] 1. Housing; 2. Drive assembly; 3. Mounting assembly; 4. Saw blade;

[0037] 11. First step; 12. Second step; 21. Drive structure; 22. Power output shaft; 23. Eccentric shaft; 31. Mounting shaft; 32. Press-fit block; 33. Trigger structure; 34. First elastic structure; 35. Second elastic structure; 41. Sawtooth; 42. Mounting hole; 43. Power slot;

[0038] 421. First hole portion; 422. Second hole portion. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate relative importance or the number of technical features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined. The following is a more detailed description of the specific implementation of this utility model in conjunction with specific embodiments:

[0043] like Figures 1 to 3 As shown, the embodiment of the present invention provides a medical oscillating saw, which includes:

[0044] Shell 1;

[0045] The drive assembly 2 includes a drive structure 21, a power output shaft 22 provided on the drive structure 21, and an eccentric shaft 23 provided on the power output shaft 22. The drive structure 21 is provided on the housing 1. The power output shaft 22 is used to output power from the drive structure 21. The eccentric shaft 23 is arranged offset from the axis of the power output shaft 22. The eccentric shaft 23 rotates around the power output shaft 22 under the drive of the power output shaft 22.

[0046] The mounting assembly 3 includes a mounting shaft 31 provided on the housing 1, and the mounting shaft 31 is parallel to and spaced from the eccentric shaft 23;

[0047] The saw blade 4 is provided with saw teeth 41, a mounting hole 42 and a power slot 43. The saw teeth 41 and the power slot 43 are respectively arranged at both ends of the saw blade 4. The mounting hole 42 is located between the saw teeth 41 and the power slot 43. The mounting hole 42 is sleeved with the mounting shaft 31, and the power slot 43 is sleeved with the eccentric shaft 23. The saw blade 4 rotates back and forth around the mounting shaft 31 when the eccentric shaft 23 rotates around the power output shaft 22.

[0048] Here, it can be understood that the housing 1 refers to a component for protecting and connecting the drive assembly 2 and the mounting assembly 3; the housing 1 is a hollow structure, and the interior of the housing 1 can accommodate the drive assembly 2 and the mounting assembly 3;

[0049] The drive assembly 2 refers to a component for driving the saw blade 4 to work; the drive assembly 2 includes a drive structure 21, a power output shaft 22 and an eccentric shaft 23; wherein the drive structure 21 is used to provide power, and the drive structure 21 includes but is not limited to a motor; the power output shaft 22 refers to a shaft body for outputting power, and the power output shaft 22 is provided on the drive structure 21, and the power of the drive structure 21 is output by the power output shaft 22, that is, the drive structure 21 is used to drive the power output shaft 22 to rotate around its own axis; the eccentric shaft 23 refers to a shaft body that is arranged deviating from the axis of the power output shaft 22, and the eccentric shaft 23 is provided on the power output shaft 22, and the eccentric shaft 23 is arranged deviating from the axis of the power output shaft 22. In this way, when the power output shaft 22 drives the eccentric shaft 23 to rotate, the eccentric shaft 23 rotates around the axis of the power output shaft 22, thereby realizing eccentric rotation;

[0050] The mounting assembly 3 is a component for mounting the saw blade 4. The mounting assembly 3 includes a mounting shaft 31. The mounting shaft 31 is a shaft body for connecting to the saw blade 4. The saw blade 4 can rotate around the mounting shaft 31. The mounting shaft 31 is parallel to the eccentric shaft 23 and is spaced apart.

[0051] The saw blade 4 refers to a component used to achieve reciprocating swing to cut objects; the saw blade 4 is provided with saw teeth 41, a mounting hole 42 and a power slot 43; wherein, the saw teeth 41 refers to the part of the saw blade 4 used for cutting objects, and the saw teeth 41 are provided at one end of the saw blade 4; the power slot 43 refers to the part of the saw blade 4 used to cooperate with the eccentric shaft 23, the eccentric shaft 23 is inserted into the power slot 43, and the eccentric shaft 23 rotates around the axis of the power output shaft 22, so that the eccentric shaft 23 rotates eccentrically, and pushes back and forth against the opposite side walls of the power slot 43, thereby pushing the saw blade 4 to rotate back and forth around the mounting shaft 31, thereby achieving the reciprocating swing of the saw teeth 41 on the saw blade 4 and achieving sawing.

[0052] By adopting the above technical solution, a power slot 43 is integrated on the saw blade 4, so that the power of the driving structure 21, the power output shaft 22 and the eccentric shaft 23 directly acts on the saw blade 4, retaining the transmission effect that can convert rotational motion into reciprocating oscillating motion; the transmission structure that is prone to vibration in traditional oscillating saws is simplified, vibration and noise are reduced, and the impact on sawing accuracy is reduced; the driving structure 21 drives the eccentric shaft 23 to directly act on the saw blade 4, reducing the energy consumption of the oscillating saw; in addition, the oscillating saw is light and has little vibration, which is convenient for doctors to use.

[0053] In one embodiment, the mounting assembly 3 also includes a press-fitting block 32 coaxially arranged on the top of the mounting shaft 31, the axial projection size of the press-fitting block 32 is larger than the axial projection size of the mounting shaft 31, and the mounting hole 42 includes a first hole portion 421 and a second hole portion 422 connected to the first hole portion 421, the first hole portion 421 is sleeved with the mounting shaft 31, and the aperture of the second hole portion 422 is larger than the axial projection size of the press-fitting block 32.

[0054] Here, it can be understood that the pressing block 32 refers to a block structure for pressing the saw blade 4 on the housing 1; the pressing block 32 is arranged on the top of the mounting shaft 31, and the pressing block 32 is coaxially arranged with the mounting shaft 31; the mounting hole 42 is a gourd hole, that is, the mounting hole 42 includes two hole portions, one large and one small, and the mounting hole 42 includes a first hole portion 421 and a second hole portion 422, which are connected. The size of the first hole portion 421 matches the size of the mounting shaft 31, so that the first hole portion 421 can be connected to the mounting shaft 31. The mounting shaft 31 is sleeved, and the size of the second hole portion 422 matches the size of the press-fitting block 32; wherein, since the aperture of the second hole portion 422 is larger than the axial projection size of the press-fitting block 32, the second hole portion 422 is first aligned with the press-fitting block 32 for installation during assembly, and after the press-fitting block 32 is passed through the second hole portion 422, the saw blade 4 is moved as a whole in the direction close to the eccentric shaft 23, and the mounting shaft 31 is moved into the first hole portion 421, so that the mounting shaft 31 is sleeved with the first hole portion 421.

[0055] By adopting the above technical solution, the disassembly and assembly of the saw blade 4 is facilitated.

[0056] In one embodiment, the mounting assembly 3 further includes a trigger structure 33 for driving the pressing block 32 to press the saw blade 4 onto the housing 1 , and the trigger structure 33 is in transmission connection with the mounting shaft 31 .

[0057] Here, it can be understood that the trigger structure 33 is used to install the mounting hole 42 and the power slot 43 of the saw blade 4 in place; the trigger structure 33 is connected to the mounting shaft 31 in a transmission manner, so that the operator can operate the trigger structure 33 to drive the mounting shaft 31 to move, and then drive the pressing block 32 on the mounting shaft 31 to press the saw blade 4 onto the housing 1, so that the mounting hole 42 and the power slot 43 are installed in place.

[0058] By adopting the above technical solution, the mounting hole 42 and the power slot 43 can be installed in place, which is beneficial to improving the reliability of the saw blade 4 during installation.

[0059] In one embodiment, the trigger structure 33 is a rotating knob connected to the installation shaft 31 , and the rotating knob is used to rotate the installation shaft 31 to drive the installation shaft 31 to move axially.

[0060] Here, it can be understood that the rotating knob refers to a knob for the assembler to rotate, and the rotating knob can drive the installation shaft 31 to move axially.

[0061] By adopting the above technical solution, the rotating knob is easy to operate, which improves the operational convenience of the assembler.

[0062] In one embodiment, the housing 1 is provided with a first step 11 and a second step 12 in parallel and spaced apart, the mounting shaft 31 is arranged through the first step 11, the eccentric shaft 23 is arranged through the second step 12, and the saw blade 4 is connected to the first step 11 and the second step 12 respectively.

[0063] Here, it can be understood that the first step 11 is used to limit the mounting hole 42 of the saw blade 4, and the second step 12 is used to limit the power slot 43 of the saw blade 4; the first step 11 and the second step 12 are arranged in parallel and spaced apart, and the mounting shaft 31 is arranged through the first step 11, so that the mounting shaft 31 can be socketed with the mounting hole 42; the eccentric shaft 23 is arranged through the second step 12, so that the eccentric shaft 23 can be socketed with the power slot 43; when the saw blade 4 is connected to the first step 11 and the second step 12 at the same time, the mounting hole 42 and the power slot 43 are just located in the appropriate installation position.

[0064] By adopting the above technical solution, the installation of the saw blade 4 is facilitated.

[0065] In one embodiment, the mounting assembly 3 further includes a first elastic structure 34 connecting the trigger structure 33 and the mounting shaft 31 . The first elastic structure 34 is used to drive the pressing block 32 to press the saw blade 4 .

[0066] Here, it can be understood that the first elastic structure 34 refers to a structure for providing elastic force, and the first elastic structure 34 includes but is not limited to a spring or an elastic washer; the first elastic structure 34 connects the trigger structure 33 and the installation shaft 31, and the elastic force of the first elastic structure 34 drives the installation shaft 31 to move, thereby causing the installation shaft 31 to drive the pressing block 32 to press tightly on the saw blade 4.

[0067] Specifically, the rotating knob has two states. The first state is that when the rotating knob is rotated to the clamping position, the rotating knob drives the mounting shaft 31 and the clamping block to move to the clamping position, and the first elastic structure 34 provides elastic force for the clamping block to clamp the saw blade 4.

[0068] By adopting the above technical solution, the reliability of the installation of the saw blade 4 is improved.

[0069] In one embodiment, the mounting assembly 3 further includes a second elastic structure 35 connecting the trigger structure 33 and the mounting shaft 31 , and the second elastic structure 35 is used to drive the press block 32 to separate from the saw blade 4 .

[0070] Here, it can be understood that the second elastic structure 35 refers to a structure for providing elastic force, and the second elastic structure 35 includes but is not limited to a spring or an elastic washer; the second elastic structure 35 connects the trigger structure 33 and the installation shaft 31, and the elastic force of the second elastic structure 35 drives the installation shaft 31 to move, thereby causing the installation shaft 31 to drive the pressing block 32 to disengage from the saw blade 4.

[0071] Specifically, the rotating knob has two states. The second state is that when the rotating knob is rotated to the disengaged position, the rotating knob drives the mounting shaft 31 and the clamping block to move to the disengaged position, and the second elastic structure 35 provides elastic force for the clamping block to disengage from the saw blade 4.

[0072] By adopting the above technical solution, the reliability of the installation of the saw blade 4 is improved.

[0073] In one embodiment, the power slot 43 is a U-shaped slot, and the slot opening of the power slot 43 is arranged in a direction away from the installation shaft 31 .

[0074] Here, it can be understood that the power groove 43 is a U-shaped groove, wherein the power groove 43 has opposite side groove walls and a bottom groove wall. The bottom groove wall and the side groove wall together form the power groove 43. The groove opening of the power groove 43 is set in a direction away from the mounting shaft 31. In this way, the groove opening of the power groove 43 is set opposite the eccentric shaft 23.

[0075] By adopting the above technical solution, the installation of the power tank 43 is facilitated.

[0076] In one embodiment, the slot of the power slot 43 gradually expands in a direction away from the mounting axis 31 .

[0077] By adopting the above technical solution, the slot of the power slot 43 is gradually enlarged, which is convenient for docking with the eccentric shaft 23 .

[0078] In a second aspect, a medical surgical tool is provided, comprising a medical surgical tool body and the above-mentioned medical oscillating saw, wherein the medical oscillating saw is arranged on the medical surgical tool body.

[0079] By adopting the above technical solution, in addition to the advantages of the medical oscillating saw of the above embodiment, the medical surgical tool of this embodiment also has the advantage of being easy to operate.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A medical oscillating saw, characterized in that: include: case; A drive assembly comprising a drive structure, a power output shaft provided on the drive structure, and an eccentric shaft provided on the power output shaft, wherein the drive structure is provided on the housing, the power output shaft is used to output power from the drive structure, the eccentric shaft is provided offset from the axis of the power output shaft, and the eccentric shaft rotates around the power output shaft under the drive of the power output shaft; A mounting assembly includes a mounting shaft provided on the housing, wherein the mounting shaft is parallel to and spaced from the eccentric shaft; A saw blade, wherein the saw blade is provided with saw teeth, a mounting hole and a power slot, the saw teeth and the power slot are respectively arranged at both ends of the saw blade, the mounting hole is located between the saw teeth and the power slot, the mounting hole is sleeved with the mounting shaft, and the power slot is sleeved with the eccentric shaft; wherein the saw blade reciprocates around the mounting shaft when the eccentric shaft rotates around the power output shaft.

2. The medical oscillating saw according to claim 1, wherein: The mounting assembly also includes a press-fitting block coaxially arranged on the top of the mounting shaft, the axial projection size of the press-fitting block is larger than the axial projection size of the mounting shaft, the mounting hole includes a first hole portion and a second hole portion connected to the first hole portion, the first hole portion is sleeved with the mounting shaft, and the aperture of the second hole portion is larger than the axial projection size of the press-fitting block.

3. The medical oscillating saw according to claim 2, wherein: The mounting assembly further comprises a trigger structure for driving the pressing block to press the saw blade onto the housing, and the trigger structure is in driving connection with the mounting shaft.

4. The medical oscillating saw according to claim 3, wherein: The trigger structure is a rotating knob, which is connected to the installation shaft. The rotating knob is used to rotate the installation shaft to drive the installation shaft to move axially.

5. The medical oscillating saw according to claim 3, wherein: The housing is provided with a first step and a second step in parallel and at intervals. The mounting shaft passes through the first step, the eccentric shaft passes through the second step, and the saw blade is connected to the first step and the second step respectively.

6. The medical oscillating saw according to claim 3, wherein: The mounting assembly further includes a first elastic structure connecting the trigger structure and the mounting shaft, wherein the first elastic structure is used to drive the pressing block to press the saw blade.

7. The medical oscillating saw according to claim 3, wherein: The mounting assembly further includes a second elastic structure connecting the trigger structure and the mounting shaft, wherein the second elastic structure is used to drive the press block to separate from the saw blade.

8. The medical oscillating saw according to any one of claims 1 to 7, characterized in that: The power groove is a U-shaped groove, and the notch of the power groove is arranged in a direction away from the installation axis.

9. The medical oscillating saw according to any one of claims 1 to 7, characterized in that: The notch of the power slot gradually expands along a direction away from the installation axis.

10. A medical surgical tool, characterized in that: The invention comprises a medical surgical tool body and the medical oscillating saw according to any one of claims 1 to 9, wherein the medical oscillating saw is arranged on the medical surgical tool body.

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