Oscillating saw assembly and oscillating saw device

Abstract

An oscillating saw assembly (100) and an oscillating saw device. The oscillating saw assembly (100) comprises an oscillating saw blade (1) and a sheath plate (2). The oscillating saw blade (1) comprises a main body portion (11) and a sawtooth portion (12) connected to one end of the main body portion (11). The sheath plate (2) comprises a first cover plate (21) and a second cover plate (22) which are stacked and fixed to each other by welding, the first cover plate (21) and the second cover plate (22) define an accommodating space (4), the main body portion (11) is arranged in the accommodating space (4) in an oscillating manner, and the sawtooth portion (12) extends from one end of the accommodating space (4). The sheath plate (2) has a front end portion (51) and a rear end portion (52), and the width of the rear end portion (52) is greater than the width of the front end portion (51).

Description

Oscillating saw assembly and oscillating saw device Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a swing saw assembly and a swing saw device. Background Technology

[0002] In orthopedic surgery in hospitals, the oscillating saw is used to saw or shave bone. An oscillating saw generally consists of an oscillating saw assembly and a drive assembly. One end of the oscillating saw blade of the oscillating saw assembly is connected to the drive assembly, which drives the oscillating saw blade to oscillate, and the saw teeth located at the other end of the oscillating saw blade cut the bone tissue. Summary of the Invention

[0003] This application provides a oscillating saw assembly and oscillating saw device, which can solve at least one of the above-mentioned technical problems.

[0004] In a first aspect, embodiments of this application provide a oscillating saw assembly, including:

[0005] A oscillating saw blade includes a main body and a saw tooth portion connected to one end of the main body;

[0006] The sheath plate includes a first cover plate and a second cover plate that are stacked and welded together to form an accommodating space. The main body is swayably disposed in the accommodating space, and the serrated part extends from one end of the accommodating space.

[0007] The sheath plate has a front end and a rear end, and the width of the rear end is greater than the width of the front end.

[0008] Secondly, embodiments of this application provide a oscillating saw device, which includes an oscillating saw assembly and a drive assembly according to any of the above embodiments, with the drive assembly being tractively connected to the oscillating saw blade.

[0009] The oscillating saw assembly provided in this application includes an oscillating saw blade and a sheath plate. The oscillating saw blade includes a main body and a saw tooth portion connected to one end of the main body. The sheath plate includes a first cover plate and a second cover plate stacked and welded together to form an accommodating space. The main body is oscillatingly disposed in the accommodating space, and the saw tooth portion extends from one end of the accommodating space. The sheath plate has a front end and a rear end, with the width of the rear end being greater than the width of the front end. Thus, compared to oscillating saw assemblies in related technologies, the first and second cover plates of the oscillating saw assembly of this application are fixed by welding, which helps to improve the structural strength of the sheath plate under high-frequency vibration environments, thereby helping to reduce the risk of cracking at the front end of the sheath plate. Furthermore, the width of the rear end being greater than the width of the front end results in a smaller front end width of the sheath plate of the oscillating saw assembly, allowing it to be closer to the surgical incision, reducing obstruction and interference to surrounding tissues, and facilitating precise operations in confined spaces. Moreover, the width of the rear end is greater than that of the front end, which makes the rear end wider. This helps to increase the contact area between the rear end and the drive component, thereby enhancing the structural strength and connection stability of the oscillating saw device and ensuring that it is not easily deformed or loosened during high-frequency oscillation. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0011] Figure 1 is a schematic diagram of the structure of the oscillating saw assembly provided in an embodiment of this application.

[0012] Figure 2 is a structural schematic diagram of part of the oscillating saw assembly in Figure 1.

[0013] Figure 3 is a schematic diagram of the structure of the second cover plate in Figure 1.

[0014] Figure 4 is a schematic diagram of the supporting skeleton provided in an embodiment of this application.

[0015] Figure 5 is a structural schematic diagram of the support skeleton provided in another embodiment of this application.

[0016] Figure 6 is a structural schematic diagram of the oscillating saw assembly in Figure 1 from another perspective.

[0017] Figure 7 is an enlarged schematic diagram of point VII in Figure 6.

[0018] Figure 8 is a structural schematic diagram of the support frame provided in another embodiment of this application.

[0019] Figure 9 is a structural diagram of the exploded structure of the oscillating saw assembly in Figure 6.

[0020] Figure 10 is an enlarged schematic diagram of point X in Figure 9.

[0021] Reference numerals: 100. Oscillating saw assembly; 1. Oscillating saw blade; 11. Main body; 12. Saw teeth; 13. Drive through hole; 14. Saw teeth; 2. Sheath plate; 21. First cover plate; 22. Second cover plate; 23. First welding through hole; 24. First positioning hole; 25. Clearance through hole; 26. Chip removal hole; 201. Rear end; 202. Front end; 3. Support frame; 31. First support frame; 32. Second support frame; 33. Second welding through hole; 34. Second positioning hole; 4. Accommodation space; 51. Front end; 52. Rear end; 53. Welding groove; 61. Welding section; 62. Support section; 71. Drive sub-section; 72. Connecting sub-section; 73. Arc-shaped gap; 74. Arc-shaped structure; 75. Arc-shaped support section;

[0022] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0024] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0025] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] In related technologies, the oscillating saw assembly typically consists of an oscillating saw blade and upper and lower cover plates fitted around the outer periphery of the oscillating saw blade. The oscillating saw blade oscillates back and forth along its own axis between the upper and lower cover plates. During surgery, the high-frequency vibration of the oscillating saw blade can easily cause cracks at the front ends of the upper and lower cover plates, affecting the surgical outcome.

[0028] In view of this, this application provides a oscillating saw assembly 100 with higher structural strength, as detailed below:

[0029] As shown in Figures 1-5, this application provides a oscillating saw assembly 100, which includes an oscillating saw blade 1 and a sheath plate 2. The oscillating saw blade 1 includes a main body portion 11 and a saw tooth portion 12 connected to one end of the main body portion 11. The sheath plate 2 includes a first cover plate 21 and a second cover plate 22 stacked and welded together, forming a receiving space 4. The main body portion 11 is oscillatingly disposed in the receiving space 4, and the saw tooth portion 12 extends from one end of the receiving space 4. The sheath plate 2 has a front end portion 51 and a rear end portion 52, with the width of the rear end portion 52 being greater than the width of the front end portion 51. Thus, compared to oscillating saw assemblies in related technologies, the first cover plate 21 and the second cover plate 22 of the oscillating saw assembly 100 of this application are fixed by welding, which helps to improve the structural strength of the sheath plate 2 under high-frequency vibration environment, thereby helping to reduce the risk of cracking at the front end 202 of the sheath plate 2.

[0030] Furthermore, the width of the rear end portion 52 is greater than the width of the front end portion 51, resulting in a smaller width of the front end portion 51 of the sheath plate 2 of the oscillating saw assembly 100. This allows it to be closer to the surgical incision, reducing obstruction and interference with surrounding tissues, and facilitating precise operations in confined spaces. Moreover, the greater width of the rear end portion 52 compared to the front end portion 51 increases the contact area between the rear end portion 52 and the drive assembly, thereby enhancing the structural strength and connection stability of the oscillating saw device and ensuring it is less prone to deformation or loosening during high-frequency oscillation.

[0031] In some embodiments, the oscillating saw assembly 100 further includes a support frame 3. The support frame 3 is disposed between the first cover plate 21 and the second cover plate 22, and is located on the side of the sheath plate 2. The support frame 3 is welded and fixed to the first cover plate 21 and the second cover plate 22 respectively, and the support frame 3, the first cover plate 21 and the second cover plate 22 together form an accommodating space 4. As shown in FIG2, the main body 11 of the oscillating saw blade 1 is located in the accommodating space 4, and the saw teeth 12 protrude from one end of the accommodating space 4.

[0032] The overall outline of the main body 11 can be roughly plate-shaped. By selecting a reasonable thickness and designing the planar dimensions, the main body 11 can reduce the overall weight of the oscillating saw blade 1 while ensuring sufficient strength, making it easier to operate and reducing the burden during the operation.

[0033] Please refer to Figures 2 and 6. The serrated portion 12 has multiple serrations 14 at the end opposite to the main body 11. The multiple serrations 14 can be arranged sequentially along the end edge of the serrated portion 12, and the spacing and height of the multiple serrations 14 can be adjusted according to actual application requirements. A reasonable arrangement of serrations 14 can effectively disperse the cutting force, reduce tissue damage caused by excessive local pressure, and at the same time reduce the wear rate of the serrations 14, extending their service life.

[0034] In some embodiments, the oscillating saw assembly 100 includes a pair of support frames 3 disposed opposite to each other on the sides of the sheath plate 2 along the width direction. The pair of support frames 3 are disposed on both sides of the sheath plate 2 along the width direction and are symmetrically distributed, so that the sheath plate 2 can withstand continuous mechanical vibration and dynamic load during the operation.

[0035] The support frame 3 extends from the rear end 201 to the front end 202 along the length of the sheath plate 2. Specifically, the support frame 3 extends continuously from the rear end 52 to the front end 51 of the sheath plate 2, covering the main structural area of ​​the sheath plate 2. The support frame 3 is fixedly connected to the lateral edges of the first cover plate 21 and the second cover plate 22 by welding, brazing, or integral molding processes, forming a stable frame-like reinforced structure. This helps improve the overall lateral stiffness and bending resistance of the sheath plate 2, effectively suppressing local deformation or fretting wear caused by the high-frequency oscillation of the swing saw blade 1.

[0036] As shown in Figures 1 and 3, the front end 202 of the sheath plate 2 is provided with a first welding through hole 23, that is, both the first cover plate 21 and the second cover plate 22 are provided with the first welding through hole 23. As shown in Figure 2, correspondingly, the front end of the support frame 3 is provided with a second welding through hole 33 at the position corresponding to the first welding through hole 23. Before welding, the first welding through hole 23 and the second welding through hole 33 are filled with welding wire; after welding, the first cover plate 21, the second cover plate 22 and the support frame 3 are connected by the molten welding wire to form a whole, thereby preventing the front end 202 of the sheath plate 2 from cracking during high-frequency vibration.

[0037] The center points of the first welding through hole 23 and the second welding through hole 33 coincide, and the welding wire can pass through the first welding through hole 23 and the second welding through hole 33, increasing the relative welding area between the sheath plate 2 and the support frame 3, thereby enhancing the structural strength of the front end 202 of the sheath plate 2 after welding.

[0038] In some embodiments, the first welding through hole 23 and the second welding through hole 33 are elongated through holes. In other embodiments, the first welding through hole 23 and the second welding through hole 33 can be regular-shaped through holes, such as multiple circular through holes, rectangular through holes, or polygonal through holes, or they can be irregular-shaped through holes, which will not be elaborated here. The shape of the second welding through hole 33 of the supporting frame 3 is shown in Figure 4 for elongated through holes and Figure 5 for circular through holes.

[0039] In this embodiment, as shown in FIG2, the first support frame 31 and the second support frame 32 of the support frame 3 are respectively located between the two sides of the first cover plate 21 and the second cover plate 22 along the width direction.

[0040] The sheath plate 2 has a first positioning hole 24 at its rear end 201. Since the support frame 3 is sandwiched between the first cover plate 21 and the second cover plate 22, the support frame 3 has a second positioning hole 34 at the corresponding position of the first positioning hole 24 of the sheath plate 2. The positioning device of the oscillating saw head (such as a positioning column or positioning block) passes through the first positioning hole 24 and the second positioning hole 34, thereby detachably fixing one end of the oscillating saw assembly 100.

[0041] The other end of the main body 11 of the oscillating saw blade 1 is provided with a drive through hole 13 for the drive part of the machine head to pass through, and the sheath plate 2 is provided with a clearance through hole 25 at the position corresponding to the drive through hole 13. The drive part of the machine head drives the oscillating saw blade 1 to oscillate back and forth, and the saw teeth 12 of the oscillating saw blade 1 saws or shaves bone.

[0042] As shown in Figure 2, the width of the main body 11 of the oscillating saw blade 1 gradually decreases from the rear end to the front end, which makes the oscillating saw blade 1 have a larger swing amplitude at the front end 202 of the sheath plate 2, which is beneficial for the oscillating saw blade to cut bone tissue.

[0043] As shown in Figures 1 and 3, the sheath plate 2 has chip removal holes 26 on both sides of its front end 202. When the removed bone tissue debris enters the front end 202 of the sheath plate 2, the bone tissue debris can be discharged outward through the chip removal holes 26, preventing the bone tissue debris from accumulating and getting stuck in the receiving space 4.

[0044] Referring to Figure 6, in some embodiments, the first cover plate 21 and the second cover plate 22, when engaged, form a connected front end portion 51 and a rear end portion 52. The front end portion 51 can be the front end 202 of the sheath plate 2, and the rear end portion 52 can be the rear end 201 of the sheath plate 2. The width of the rear end portion 52 is greater than the width of the front end portion 51. The width of the main body portion 11 gradually decreases from the main body portion 11 towards the serrated portion 12. Thus, the front end portion 51 of the sheath plate 2 of the oscillating saw assembly 100 of this application has a smaller width, allowing it to be closer to the surgical incision, reducing obstruction and interference to surrounding tissues, and facilitating precise operations in confined spaces.

[0045] In addition, the rear end 52 has a larger width, which helps to increase the contact area between the rear end 52 and the drive component, thereby enhancing the structural strength and connection stability of the oscillating saw device and ensuring that it is not easily deformed or loosened during high-frequency oscillation.

[0046] Furthermore, the width of the main body 11 of the oscillating saw blade 1 gradually decreases from the end away from the saw tooth 12 to the other end connected to the saw tooth 12, forming a tapered transition structure. This not only reduces the overall weight of the oscillating saw blade 1, but also reduces the resistance during the movement, improves the oscillation response speed and energy efficiency, and also makes the main body 11 compatible with the narrower sheath plate 2 at the front end 51, further reducing the envelope size of the working area at the front end 202 of the oscillating saw assembly 100.

[0047] In some embodiments, the width of the front end portion 51 is not less than 14 mm and not more than 23 mm. For example, the width of the front end portion 51 can be, but is not limited to, 14 mm, 16 mm, 18 mm, 20 mm, or 23 mm. Thus, the narrower size design of the front end portion 51 effectively reduces the space occupied by the oscillating saw assembly 100 in the surgical area, facilitating access to the target bone tissue in orthopedic surgery, such as for space-constrained minimally invasive surgical procedures. This helps reduce pressure and interference with surrounding soft tissues, improving the visibility of the surgical field and the degree of freedom of operation. The width of the front end portion 51 within the aforementioned range allows for miniaturization of the front end 202 structure while maintaining structural rigidity, contributing to improved surgical precision.

[0048] In some embodiments, the width of the rear end portion 52 is not less than 26 mm and not more than 28 mm. For example, the width of the rear end portion 52 can be, but is not limited to, 26 mm, 27 mm, or 28 mm. Thus, the rear end portion 52 has a relatively large width, and the width dimension of the rear end portion 52 is set in the range of 26 mm to 28 mm, providing sufficient mounting area and mechanical support for the connection part between the sheath plate 2 and the drive assembly, thereby enhancing the vibration resistance and connection reliability of the overall structure.

[0049] In some embodiments, the sheath plate 2 has an arc-shaped transition on both sides of the connection between the front end 51 and the rear end 52 along its width direction. This makes the shape change between the front end 51 and the rear end 52 smoother, avoiding sharp edges or abrupt cross-sections, effectively reducing the risk of stress concentration, and improving the structural durability of the sheath plate 2 under high-frequency oscillation conditions. The arc-shaped contour also improves the smoothness of the outer surface of the oscillating saw assembly 100, reducing the possibility of snagging or scraping with surrounding tissues during surgery, which helps to ensure surgical safety. The symmetrical arc-shaped transition structure on both sides enhances the mechanical symmetry of the overall structure, making the load transfer more uniform and helping to maintain the trajectory stability of the oscillating saw blade 1 in reciprocating motion.

[0050] Referring to Figures 6 and 7, in some embodiments, the support frame 3, the first cover plate 21, and the second cover plate 22 cooperate to form a solder receiving groove 53, which is located outside the receiving space 4. During the manufacturing process of the sheath plate 2, the first cover plate 21, the second cover plate 22, and the support frame 3 are connected by laser welding or resistance welding. The molten solder flows into the solder receiving groove 53 and solidifies, forming a strong structural connection. This effectively prevents solder from overflowing into the receiving space 4 and affecting the freedom of movement of the oscillating saw blade 1 or causing jamming. The solder receiving groove 53 is positioned to avoid the movement path of the oscillating saw blade 1, ensuring that the welding process does not affect the accuracy and cleanliness of the internal moving parts.

[0051] Referring to Figure 7, in some embodiments, the solder receiving groove 53 is located at the front end 51 of the sheath plate 2, which facilitates precise positioning and reliable connection of the front end 51 during manufacturing and assembly, ensuring the relative position stability between the first cover plate 21, the second cover plate 22, and the support frame 3. After welding, the cured solder forms a continuous connecting layer in the solder receiving groove 53, significantly enhancing the overall structural rigidity and connection strength of the front end 51, and also improving the mechanical stability of the front end 51 under high-frequency reciprocating oscillation conditions, effectively suppressing fretting wear and structural loosening caused by vibration, while improving fatigue resistance and extending the service life of the oscillating saw assembly 100.

[0052] In some embodiments, there are multiple solder receiving grooves 53, with solder receiving grooves 53 provided on both opposite sides of the front end 51 along the width direction of the sheath plate 2. During the welding process, molten solder fills the solder receiving grooves 53 on both sides, and after solidification, forms a continuous and stable welded joint, effectively enhancing the bonding strength between the first cover plate 21, the second cover plate 22, and the support frame 3. The layout of multiple solder receiving grooves 53 significantly improves the overall rigidity and torsional resistance of the sheath plate 2, enabling it to maintain structural stability when subjected to the dynamic load generated by the high-frequency reciprocating oscillation of the swing saw blade 1, reducing vibration deformation, and preventing cracking or loosening due to weak local connections.

[0053] The solder receiving groove 53 extends along the length of the sheath plate 2. During welding, molten solder uniformly fills the solder receiving groove 53 along the length, forming a continuous and dense weld, which significantly enhances the structural connection strength between the first cover plate 21, the second cover plate 22, and the support frame 3. Furthermore, it facilitates the uniform distribution of welding heat input, reduces local overheating or welding deformation, and improves assembly accuracy. Simultaneously, the solder receiving groove 53 extending along the length and the welding section 61 of the support frame 3 work together to make it easier for the solder to achieve full wetting and stable formation under capillary action and gravity, avoiding solder accumulation or voids.

[0054] In some embodiments, there can be two support frames 3, which are respectively disposed on both sides of the sheath plate 2 along the width direction. Each support frame 3 cooperates with the first cover plate 21 and the second cover plate 22 to form a solder receiving groove 53, thereby forming two symmetrically distributed solder receiving grooves 53, so that the welding area is evenly distributed in the width direction of the sheath plate 2, effectively improving the mechanical balance and connection rigidity of the overall structure.

[0055] Referring to Figures 7 and 8, in some embodiments, the support frame 3 includes a welded section 61 and a support section 62 connected together. The welded section 61 serves as the connection area between the support frame 3 and the cover plate structure of the sheath plate 2, providing a welding interface to ensure a firm connection between the first cover plate 21, the second cover plate 22, and the support frame 3. The support section 62 undertakes the main structural support function, located outside the accommodating space 4 or extending to the rear end 52, to enhance the overall rigidity and deformation resistance of the sheath plate 2.

[0056] The welding section 61 is recessed relative to the support section 62, forming a recessed area lower than the surface of the support section 62 in the spatial structure. This provides a dedicated cavity for the solder in the welding process, allowing the molten solder to flow and fill within a controllable range. For example, the welding section 61, the first cover plate 21, and the second cover plate 22 cooperate to form a solder receiving groove 53.

[0057] The connection between the welding section 61 and the support section 62 is an arc-shaped transition. This not only reduces stress concentration but also improves the fluidity of the solder in the molten state, promoting thorough wetting and dense filling of the solder within the solder reservoir 53. The arc-shaped transition structure at the connection between the welding section 61 and the support section 62 avoids solder flow obstruction caused by sharp or right-angle connections, effectively preventing the formation of dead corners or pores within the solder reservoir 53. The reduction in porosity and pores significantly improves the density and mechanical strength of the weld joint, reducing the risk of weld cracking due to defect propagation under high-frequency vibration environments.

[0058] In some embodiments, the first cover plate 21 has a first surface on the side facing the second cover plate 22, and the second cover plate 22 has a second surface on the side facing the first cover plate 21, with the second surface opposite to and spaced apart from the first surface.

[0059] The distance between the first and second surfaces is not less than 0.35 mm and not more than 0.5 mm, and the thickness of the main body 11 is not less than 0.3 mm and not more than 0.4 mm. The distance between the first and second surfaces can be, but is not limited to, 0.35 mm, 0.40 mm, 0.45 mm, or 0.5 mm. The thickness of the main body 11 can be, but is not limited to, 0.3 mm, 0.35 mm, or 0.4 mm. Thus, the thickness design of the main body 11 matches the internal gap of the sheath plate 2, and the first and second surfaces can form a receiving space 4 to accommodate the main body 11, ensuring that the oscillating saw blade 1 has sufficient freedom of movement during operation without wobbling or shifting due to excessive gaps.

[0060] In addition, the distance between the first surface and the second surface is slightly greater than the thickness of the main body 11, forming a single-sided gap of 0.05 mm to 0.15 mm. This helps to reduce the frictional resistance between the oscillating saw blade 1 and the inner wall of the sheath plate 2, prevents jamming during operation, and limits the excessive displacement of the oscillating saw blade 1 in the direction perpendicular to the oscillation plane, thereby improving the trajectory accuracy and operational safety during the cutting process.

[0061] Furthermore, the distance between the first surface and the second surface is not less than 0.35 mm and not more than 0.5 mm, and the thickness of the main body 11 is not less than 0.3 mm and not more than 0.4 mm, so that the main body 11 and the sheath plate 2 fit together more tightly, thereby making the oscillating saw assembly 100 more compact.

[0062] Referring to Figures 9 and 10, in some embodiments, the main body 11 of the oscillating saw blade 1 is composed of a drive sub-part 71 and a connecting sub-part 72. The drive sub-part 71 is located at the rear end 201 of the main body 11 and is used for transmission connection with the drive assembly of the oscillating saw device, receiving driving force and realizing reciprocating oscillation. The connecting sub-part 72 is disposed between the drive sub-part 71 and the saw tooth part 12, undertaking the functions of force transmission and structural transition. The outer contour of the connecting sub-part 72 gradually narrows along the length direction, forming a conical structure, which not only reduces the overall mass of the oscillating saw blade 1, but also helps to reduce air resistance and inertial forces during movement.

[0063] In some embodiments, the outer contour of the drive sub-unit 71 is an arc-shaped structure 74, the radius of curvature of which matches the swing trajectory of the oscillating saw blade 1, ensuring smooth power transmission during the swing and reducing motion interference and local stress concentration. The drive sub-unit 71 is coupled to the drive shaft or drive groove in the external drive assembly through the arc-shaped outer contour to achieve precise transmission of high-frequency reciprocating oscillation.

[0064] The support frame 3 has an arc-shaped support portion 75 on the side facing the drive sub-part 71, which is adapted to the outer contour of the drive sub-part 71. The arc-shaped structure 74 and the arc-shaped support portion 75 cooperate to form an arc-shaped gap 73. The arc-shaped support portion 75 extends along the inner edge of the support frame 3, and its geometry is adapted to the outer contour of the drive sub-part 71. The curvature of the arc-shaped support portion 75 is consistent with the arc-shaped structure 74 of the drive sub-part 71, and the two correspond to each other in space, forming a uniformly distributed arc-shaped gap 73. The arc-shaped gap 73 surrounds the drive sub-part 71, and its shape matches the movement path of the drive sub-part 71, allowing the drive sub-part 71 to swing freely within a limited range, while helping to reduce the risk of contact friction between the drive sub-part 71 and the support frame 3.

[0065] The width of the arc-shaped gap 73 is within the range of not less than 0.4 mm and not more than 0.6 mm. For example, the width of the arc-shaped gap 73 can be, but is not limited to, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, or 0.6 mm. Within this range, the width of the arc-shaped gap 73 ensures sufficient movement space for the drive sub-unit 71 during high-frequency oscillation, preventing jamming due to thermal expansion or minor assembly deviations, while also effectively limiting lateral displacement, ensuring the stability of the motion trajectory and cutting accuracy. Furthermore, the width of the arc-shaped gap 73 within this range allows for a more compact fit between the main body 11 and the support frame 3, resulting in a smaller overall size for the oscillating saw assembly 100.

[0066] This application embodiment also provides a swing saw device, which includes a drive component and a swing saw assembly 100 according to any of the above embodiments. The drive component is drivenly connected to the swing saw blade 1. The drive component is disposed at one end of the sheath plate 2 or integrated with the sheath plate 2. The output end of the drive component is drivenly connected to the main body 11 of the swing saw blade 1 through a transmission mechanism, transmitting the driving force to the swing saw blade 1. The transmission mechanism can adopt an eccentric connecting rod, a flexible transmission shaft, an electromagnetic drive module, or a gear rocker structure to convert the rotational motion or reciprocating linear motion generated by the drive component into high-frequency reciprocating oscillation of the swing saw blade 1 around a fulcrum. The drive component provides a stable and controllable power output, adjusting the oscillation frequency and amplitude to adapt to the cutting requirements of bone tissues of different hardness. The sheath plate 2 constrains and guides the movement path of the swing saw blade 1, preventing lateral deviation or vibration of the swing saw blade 1 during oscillation, thereby improving cutting accuracy and operational safety.

[0067] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0068] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A oscillating saw assembly, wherein, include: A oscillating saw blade includes a main body and a saw tooth portion connected to one end of the main body; The sheath plate includes a first cover plate and a second cover plate that are stacked and welded together to form an accommodating space. The main body is swayably disposed in the accommodating space, and the serrated part extends from one end of the accommodating space. The sheath plate has a front end and a rear end, and the width of the rear end is greater than the width of the front end.

2. The oscillating saw assembly according to claim 1, wherein, The width of the front end is not less than 14 mm and not more than 23 mm, and the width of the rear end is not less than 26 mm and not more than 28 mm.

3. The oscillating saw assembly according to claim 1, wherein, Both sides of the sheath plate along its width direction, at the connection between the front end and the rear end, are connected in an arc-shaped transition.

4. The oscillating saw assembly according to claim 1, wherein, Also includes: A support frame is disposed between the first cover plate and the second cover plate, and the support frame is located on the side of the sheath plate. The support frame is welded and fixed to the first cover plate and the second cover plate respectively, so that the first cover plate and the second cover plate can be closed to form the receiving space.

5. The oscillating saw assembly according to claim 4, wherein, The support frame is a pair, and the pair of support frames are disposed on the side of the sheath plate along the width direction. The support frame extends from the rear end to the front end along the length direction of the sheath plate.

6. The oscillating saw assembly according to claim 4 or 5, wherein, The supporting frame, the first cover plate, and the second cover plate cooperate to form a solder receiving groove, which is located outside the receiving space.

7. The oscillating saw assembly according to claim 6, wherein, The support frame includes a welded section and a support section connected to each other. The welded section is recessed relative to the support section. The connection between the welded section and the support section is an arc-shaped transition. The welded section, the first cover plate, and the second cover plate cooperate to form the solder receiving groove.

8. The oscillating saw assembly according to claim 6, wherein, The solder receiving groove is located at the front end of the sheath plate.

9. The oscillating saw assembly according to claim 6, wherein, The number of solder receiving grooves is at least two, and the two solder receiving grooves are located on opposite sides of the sheath plate along the width direction of the sheath plate.

10. The oscillating saw assembly according to claim 6, wherein, The solder receiving groove extends along the length of the sheath plate.

11. The oscillating saw assembly according to claim 6, wherein, The main body includes a driving sub-part and a connecting sub-part, wherein the connecting sub-part is connected between the driving sub-part and the sawtooth part; The outer contour of the drive sub-unit is an arc-shaped structure. The support frame is provided with an arc-shaped support part on the side facing the drive sub-unit, which is adapted to the outer contour of the drive sub-unit. The arc-shaped structure and the arc-shaped support part cooperate to form an arc-shaped gap. The width of the arc-shaped gap is not less than 0.4 mm and not more than 0.6 mm.

12. The oscillating saw assembly according to claim 1, wherein, The first cover plate has a first surface on the side facing the second cover plate, and the second cover plate has a second surface on the side facing the first cover plate. The second surface is opposite to and spaced apart from the first surface. The distance between the first surface and the second surface is not less than 0.35 mm and not more than 0.5 mm. The thickness of the main body is not less than 0.3 mm and not more than 0.4 mm.

13. The oscillating saw assembly according to claim 2, wherein, The front end of the sheath plate is provided with a first welding through hole, and the front end of the support frame is provided with a second welding through hole. The first welding through hole and the second welding through hole are filled with welding wire, and the first cover plate, the second cover plate and the support frame are welded together by the welding wire.

14. The oscillating saw assembly according to claim 13, wherein, The center points of the first welding through hole and the second welding through hole coincide.

15. The oscillating saw assembly according to claim 13, wherein, The first welding through hole and the second welding through hole are circular through holes, rectangular through holes or polygonal through holes.

16. The oscillating saw assembly according to claim 2, wherein, The sheath plate has a first positioning hole at its rear end, and the support frame has a second positioning hole at a position corresponding to the first positioning hole.

17. The oscillating saw assembly according to claim 1, wherein, The other end of the main body is provided with a drive through hole, and the sheath plate is provided with an avoidance through hole at a position corresponding to the drive through hole.

18. The oscillating saw assembly according to claim 1, wherein, The width of the main body gradually decreases from its rear end to its front end.

19. The oscillating saw assembly according to claim 1, wherein, The sheath plate has chip removal holes on both sides at its front end.

20. A swing saw device, wherein, include: The oscillating saw assembly as described in any one of claims 1 to 19; as well as The drive assembly is connected to the oscillating saw blade.

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