Swing type sharp saw

Abstract

The utility model discloses a swing type sharp saw and relates to the field of medical instruments, the swing type sharp saw comprises a main body structure, a saw blade fixing module and a driving module, according to the swing type sharp saw, a saw blade module is rapidly installed through a positioning groove and a rotary pressing mode, and when the saw blade module needs to be replaced, the saw blade module can be conveniently replaced. According to the swing type sharp saw, the threaded rod only needs to be rotated again so that the multiple sliding blocks can be folded inwards and get close to each other, the downward pressing part does not hinder the saw shell to be separated from the positioning groove upwards any more, the whole saw blade module can be lifted upwards to be separated from the positioning groove quickly, and quick separation is achieved. The saw shell can be tightly pressed in the positioning groove or released from the positioning groove only by simply rotating the threaded rod, and the requirement that the saw blade module needs to be rapidly replaced for multiple times in the operation process can be met.

Description

Technical Field

[0001] This application relates to the field of medical devices, and more particularly to a oscillating point saw. Background Technology

[0002] Electric power tools for orthopedic surgery refer to specialized medical electric devices used in orthopedic surgery to perform operations such as drilling, sawing bone, grinding, screwing, placing and removing screws. They typically consist of a drive source, transmission mechanism, control system, and matching surgical accessories.

[0003] The oscillating saw is part of a power-powered tool. Unlike traditional orthopedic oscillating saws (where the entire saw blade oscillates back and forth), the oscillating saw allows only the front teeth of the blade to oscillate while the main body of the saw remains stationary. Therefore, the oscillating saw offers several advantages in the medical field, such as: 1. The sawing action of the oscillating saw is more focused, avoiding path deviation caused by the overall oscillation of the traditional saw blade, making osteotomy operations more precise, especially suitable for joint replacement and minimally invasive osteotomy surgeries requiring high-precision bone volume control; 2. The main body of the saw remains stationary, effectively reducing the risk of non-target damage to surrounding soft tissues, even on narrow bone surfaces. 3. The smaller friction area generated by the swing of the front saw head helps reduce temperature rise and thermal damage during osteotomy, reduces thermal necrosis of bone tissue, and improves osteotomy quality; 4. The saw blade body does not participate in the swing, making the surgical field clearer and more stable, avoiding the impact on the doctor's observation and positioning due to the vibration of the saw body, which is especially important in minimally invasive endoscopic surgery; 5. Since most of the saw body mass remains stationary, the vibration transmitted by the handle is significantly reduced, making the doctor's operation more stable and reducing fatigue, thereby improving the control performance and cutting consistency during long-term continuous operation.

[0004] According to medical standards, the saw blade module of a swing-type oscillating saw is a disposable component that needs to be discarded after a single use. However, multiple saw blade modules need to be replaced during a single surgery. In existing technologies, such as the minimally invasive medical swing saw disclosed in patent CN219594723U, the saw blade is located inside the blade holder, which does not allow for quick replacement. Utility Model Content

[0005] This application provides a swing-type tip saw that enables quick replacement of the saw blade module.

[0006] This application provides a swing-type point saw, comprising:

[0007] The main structure has a positioning groove along the Z-axis.

[0008] The saw blade module includes a saw shell and a saw blade assembly movably disposed within the saw shell. The first end of the saw shell is disposed within a positioning groove, and the outer peripheral surface of the first end of the saw shell is in contact with the inner peripheral surface of the positioning groove. The first end of the saw shell is provided with an mounting hole and a connecting hole. The first end of the saw blade assembly is disposed within a connecting hole and a driving hole. The second end of the saw blade assembly is used to cut external objects.

[0009] The saw blade fixing module includes a threaded rod, a threaded block, and a sliding block. The threaded rod is rotatably mounted on the main structure. The threaded block is threadedly connected to the threaded rod. Multiple sliding blocks surround the threaded block. The mounting hole of the saw shell is fitted onto the outside of the multiple sliding blocks. The sliding block includes a sliding body and a pressing part disposed on the sliding body. The sliding body is slidably connected to the positioning groove in the horizontal direction. The sliding body and the threaded block are slidably engaged by an inclined surface to realize that the threaded block drives the multiple sliding blocks to retract and expand in the horizontal direction. The pressing part expands to the surface of the mounting hole to press the saw shell.

[0010] The drive module includes a drive rod for moving the saw blade assembly. The drive rod passes through the drive hole of the saw blade assembly along the Z-axis and is used to move the saw blade assembly to cut external objects.

[0011] Preferably, the main structure has an internal cavity, a first through hole on one side of the main structure, and a second and a third through hole on the inner bottom surface of the positioning groove; the drive module is disposed in the cavity, the power input shaft of the drive module passes through the first through hole, the drive rod of the drive module passes upward through the second through hole; and the threaded rod of the saw blade fixing module passes upward through the third through hole.

[0012] Preferably, the saw casing of the saw blade module includes two stacked blade-shaped shells, with the saw blade assembly disposed between the two blade-shaped shells.

[0013] Preferably, each of the two sheet-like shells is provided with a mounting hole, a connecting hole, a first hinge hole, and a second hinge hole along its length; the sheet-like shells are also provided with a guide groove, a first clearance groove, and a second clearance groove, the guide groove being connected to the connecting hole and the first hinge hole respectively, and the first clearance groove being connected to the first hinge hole and the second hinge hole respectively.

[0014] The saw blade assembly includes a first pusher blade, a second pusher blade, and a saw tooth blade for cutting. The first pusher blade is disposed in a guide groove, which guides the first pusher blade along the length of the sheet-like shell. The first end of the first pusher blade is located in a connecting hole and has a drive hole. The second end of the first pusher blade is hinged to the first end of the second pusher blade in a first hinge hole. The second pusher blade is disposed in a first clearance groove, which prevents the second pusher blade from swinging horizontally. The second end of the second pusher blade is hinged to the first end of the saw tooth blade. The middle part of the saw tooth blade is hinged to the sheet-like shell via a pin. The saw tooth blade is disposed in a second clearance groove, which prevents the saw tooth blade from swinging horizontally.

[0015] Preferably, the threaded rod extends through the main structure along the Z-axis, and a rotating block is provided at the lower end of the threaded rod.

[0016] Preferably, the threaded block is provided with a dovetail protrusion, the sliding body of the sliding block is provided with a dovetail groove, the dovetail protrusion is slidably disposed in the dovetail groove, the inner side of the dovetail groove is configured as a first inclined surface, the first inclined surface has a predetermined angle with the Z-axis direction, the dovetail protrusion is provided with a second inclined surface that slides in contact with the first inclined surface, when the first inclined surface and the second inclined surface slide relative to each other, the sliding body moves closer to or away from the threaded block in the horizontal direction.

[0017] Preferably, the inner bottom surface of the positioning groove is provided with a straight protrusion, the length direction of the straight protrusion is parallel to the horizontal plane, and the bottom of the sliding body is provided with a straight groove, the straight protrusion is slidably disposed in the straight groove, which is used to restrict the sliding body to slide only in the length direction of the straight protrusion.

[0018] Preferably, the pressing part of the sliding block protrudes from the sliding body in the horizontal direction, and a chamfer is provided between the lower surface and the outer peripheral surface of the pressing part. There is a predetermined gap between the lower surface of the pressing part and the inner bottom surface of the positioning groove in the Z-axis direction, and the predetermined gap is smaller than the thickness of the saw shell.

[0019] Preferably, the drive module includes a power input shaft, a spatial cam, roller 1, a sliding frame, and a drive rod; the power input shaft is rotatably mounted within the main structure, and the spatial cam is sleeved on the power input shaft; the axial end face of the spatial cam includes two helical surfaces extending axially around the power input shaft, the two helical surfaces being connected end to end to form a closed continuous surface for driving roller 1 to reciprocate axially; both roller 1 are rotatably mounted on the sliding frame and located on both sides of the spatial cam, the outer peripheral surface of roller 1 is in rolling contact with the axial end face of the spatial cam, and the rotation of the spatial cam drives roller 1 to reciprocate axially, the sliding frame is slidably mounted inside the main structure along the axial direction of the power input shaft, the lower end of the drive rod is fixedly mounted on the sliding frame, and the upper end of the drive rod passes through the drive hole of the saw blade assembly.

[0020] Preferably, the drive module includes a power input shaft, a cylindrical cam, a second roller, a sliding frame, and a drive rod. The power input shaft is located within the main structure, and the cylindrical cam is sleeved on the power input shaft. The cylindrical cam has two helical grooves extending axially around the power input shaft. The two helical grooves are connected end to end to form an annular groove for driving the second roller to reciprocate axially. The second roller is rotatably mounted on the sliding frame, and the outer circumferential surface of the second roller is in rolling contact with the inner surface of the annular groove. The rotation of the cylindrical cam drives the second roller to reciprocate axially. The sliding frame is slidably mounted inside the main structure along the axial direction of the power input shaft. The lower end of the drive rod is mounted on the sliding frame, and the upper end of the drive rod passes through the drive hole of the saw blade assembly.

[0021] The oscillating point saw of this application has at least the following beneficial effects:

[0022] In this application's oscillating point saw, when installing the saw blade module, the first end of the saw shell is aligned with the positioning groove and pressed downwards into it. After being pressed in place, the mounting hole of the saw shell surrounds the outside of multiple sliding blocks. Finally, by rotating the threaded rod, the threaded blocks move downwards, causing the multiple sliding blocks to expand outwards in the horizontal direction. The downward pressing part of the sliding block expands outwards to the surface of the mounting hole and presses against it, thereby pressing the saw shell tightly into the positioning groove. The quick installation of the saw blade module is achieved through a combination of positioning groove and rotational pressing. When the saw blade module needs to be replaced, simply reverse the rotation of the threaded rod. The lever allows multiple sliding blocks to retract inwards and move closer together. The downward pressing part no longer obstructs the saw housing from disengaging from the positioning groove, allowing the entire saw blade module to be quickly lifted away from the positioning groove, achieving rapid disengagement. On the other hand, when the saw blade module is installed or disengaged from the positioning groove, the drive rod is inserted into or disengaged from the drive hole of the saw blade assembly, thereby achieving connection and disengagement between the drive module and the saw blade assembly. The oscillating pointed saw of this application can achieve rapid replacement of the saw blade module. Simply rotating the threaded rod can press the saw housing into the positioning groove or release the saw housing from the positioning groove, which can meet the needs of multiple and rapid replacement of the saw blade module during surgery. Attached Figure Description

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0024] Figure 1 This is an exploded schematic diagram of the oscillating spiked saw of this application;

[0025] Figure 2 This is an isometric view of the main structure (showing the straight protrusions of the saw blade fixing module);

[0026] Figure 3 It is a vertical cross-sectional view of the main structure;

[0027] Figure 4 This is an exploded view of the saw blade fixing module;

[0028] Figure 5 It is an exploded view of the sheet shell and saw blade assembly from an upward perspective;

[0029] Figure 6 This is a schematic diagram showing the saw blade module after it has been installed into the positioning slot;

[0030] Figure 7 yes Figure 6 Enlarged view of point A in the middle;

[0031] Figure 8 This is a structural schematic diagram of the threaded block and the sliding block. (A1) represents the bottom view, and (A2) represents the CC schematic diagram in (A1).

[0032] Figure 9 yes Figure 8 Enlarged view of point B in (A2);

[0033] Figure 10 It is a vertical cross-sectional view of the main structure and the saw blade fixing module;

[0034] Figure 11 This is a structural diagram of the first type of drive module. (B1) represents the isometric view from the first angle, and (B2) represents the isometric view from the second angle.

[0035] Figure 12 This is a structural diagram of the second type of drive module. (C1) represents the isometric view from the first angle, and (C2) represents the isometric view from the second angle.

[0036] The annotations in the attached figures are explained as follows:

[0037] 100. Main structure; 100a. Positioning groove; 100b. Cavity; 100c. First perforation; 100d. Second perforation; 100e. Third perforation;

[0038] 200, Saw blade module; 210, Saw housing; 211, Sheet-shaped shell; 220, Saw blade assembly; 221, First pusher blade; 221a, Drive hole; 222, Second pusher blade; 223, Saw tooth blade; 200a, Mounting hole; 200b, Connecting hole; 200c, First hinge hole; 200d, Second hinge hole; 200e, Guide groove; 200f, First clearance groove; 200g, Second clearance groove;

[0039] 300. Saw blade fixing module; 310. Threaded rod; 311. Rotating block; 312. Dovetail protrusion; 313. Second inclined surface; 320. Threaded block; 330. Sliding block; 331. Sliding body; 332. Pressing part; 3321. Chamfer; 333. Dovetail groove; 334. First inclined surface; 335. Straight groove; 340. Straight bar protrusion;

[0040] 400, Drive module; 410, Power input shaft; 420, Spatial cam; 421, Helical surface; 430, Roller one; 440, Sliding frame; 450, Drive rod; 460, Cylindrical cam; 461, Helical groove; 470, Roller two;

[0041] θ, the predetermined included angle;

[0042] H, scheduled interval;

[0043] L is the height position of the bottom surface inside the positioning groove. Detailed Implementation

[0044] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0046] This embodiment discloses an oscillating pointed saw, which is used for cutting and other actions during orthopedic surgery.

[0047] like Figure 1As shown, the oscillating point saw includes a main structure 100, a saw blade module 200, a saw blade fixing module 300, and a drive module 400. The main structure 100 is used to connect to an external power unit. The power unit provides power to the drive module 400 by connecting to the drive module 400 located in the main structure 100. In this embodiment, the drive module 400 can also be a component with its own motor or other driving capabilities. The saw blade module 200 can achieve oscillating cutting under the drive of the drive module 400. The saw blade fixing module 300 is used to fix the saw blade module 200 on the main structure 100.

[0048] like Figure 1 As shown, in order to facilitate understanding of the technical solution of this embodiment, the following directions are defined first: the horizontal direction is defined as the X-axis direction, the horizontal direction is defined as the Y-axis direction, and the height direction is defined as the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction intersect each other perpendicularly to form a three-dimensional rectangular coordinate system.

[0049] like Figure 2 and Figure 3 As shown, the upper end of the main structure 100 is provided with a positioning groove 100a, which is recessed downward along the Z-axis and the inner bottom surface of the positioning groove 100a is a horizontal plane. The interior of the main structure 100 is provided with a cavity 100b for installing the drive module 400. The left side of the main structure 100 is provided with a first through hole 100c, which connects to the cavity 100b, facilitating the outward extension of the power input shaft 410 of the drive module 400 and its connection to an external power unit, thereby enabling the power unit to drive the power input shaft 410 to rotate. The main structure 100 is also provided with a second through hole 100d and a third through hole 100e. The second through hole 100d and the third through hole 100e are distributed at intervals along the X-axis direction, and both the second through hole 100d and the third through hole 100e are opened on the inner bottom surface of the positioning groove 100a. Both the second through hole 100d and the third through hole 100e are connected to the internal cavity 100b of the main structure 100. The second through hole 100d and the third through hole 100e are used to provide upward protrusion positions for the threaded rod 310 of the saw blade fixing module 300 and the drive rod 450 of the drive module 400.

[0050] like Figure 4As shown, the saw blade module 200 has an overall shape of a sheet-like structure with a certain length. The saw blade module 200 includes a saw shell 210 and a saw blade assembly 220. The saw shell 210 is configured with a first end and a second end at its two ends in the X-axis direction, respectively. The first end of the saw shell 210 is disposed in the positioning groove 100a, and the outer peripheral contour of the first end of the saw shell 210 matches the inner peripheral contour of the positioning groove 100a. When the first end of the saw shell 210 is disposed in the positioning groove 100a, the outer peripheral surface of the first end of the saw shell 210 is in close contact with the inner peripheral surface of the positioning groove 100a, thereby restricting the movement of the saw shell 210 in the horizontal direction. That is, when the saw shell 210 is installed in the positioning groove 100a, the saw shell 210 cannot move in the horizontal direction relative to the positioning groove 100a. The first end of the saw housing 210 is also provided with a mounting hole 200a and a connecting hole 200b. The mounting hole 200a and the connecting hole 200b are spaced apart in the X-axis direction. Both the mounting hole 200a and the connecting hole 200b are through holes that pass through the saw housing 210 in the Z-axis direction. The mounting hole 200a is used to fit around the multiple sliding blocks 330 of the saw blade fixing module 300. The connecting hole 200b is used to provide upward space for the drive rod 450 of the drive module 400 to pass through, so that the drive rod 450 can be connected to the saw blade assembly 220 located in the connecting hole 200b. The saw blade assembly 220 is movably disposed within the saw housing 210. The saw blade assembly 220 is configured with a first end and a second end at its two ends in the X-axis direction. The first end of the saw blade assembly 220 is located within the connecting hole 200b of the saw housing 210. The first end of the saw blade assembly 220 is provided with a drive hole 221a that extends along the Z-axis direction. The drive rod 450 of the drive module 400 passes upward through the drive hole 221a so that the drive rod 450 can drive the saw blade assembly 220 to move, thereby enabling the second end of the saw blade assembly 220 to cut external objects.

[0051] like Figure 4 As shown, in this preferred embodiment, the saw housing 210 includes two sheet-like shells 211, which are stacked along the Z-axis. The saw blade assembly 220 is movably disposed between the two sheet-like shells 211, forming a sandwich-like sandwich structure. In this embodiment, the saw blade module 200 is generally thin-sheet shaped, which can be adapted to the thickness of the wound channel.

[0052] like Figure 4 and Figure 5As shown in this preferred embodiment, each of the two sheet-like shells 211 is provided with a mounting hole 200a, a connecting hole 200b, a first hinge hole 200c, and a second hinge hole 200d. The mounting hole 200a, connecting hole 200b, first hinge hole 200c, and second hinge hole 200d are all through holes that extend along the Z-axis. The upper sheet-like shell 211 is also provided with a guide groove 200e, a first clearance groove 200f, and a second clearance groove 200d. g, wherein the guide groove 200e, the first clearance groove 200f and the second clearance groove 200g are all formed by being recessed along the Z-axis direction. The two ends of the guide groove 200e are respectively connected to the connecting hole 200b and the first hinge hole 200c. The length direction of the guide groove 200e is configured in the X-axis direction. The first clearance groove 200f is respectively connected to the first hinge hole 200c and the second hinge hole 200d. The second clearance groove 200g is guided along the X-axis direction to the second end of the sheet shell 211.

[0053] like Figure 5As shown, in this preferred embodiment, the saw blade assembly 220 includes a first pusher 221, a second pusher 222, and a saw tooth 223 for cutting. The first pusher 221 is disposed within a guide groove 200e, and the inner side of the guide groove 200e slides in contact with the outer side of the first pusher 221, so that the guide groove 200e can restrict the first pusher 221 to slide only in the X-axis direction. The first end of the first pusher 221 is located within the connecting hole 200b. The first end of the first push plate 221 is provided with a drive hole 221a for the drive rod 450 to pass through. The second end of the first push plate 221 can extend into the first hinge hole 200c. The first end of the second push plate 222 is also located in the first hinge hole 200c. The second end of the first push plate 221 and the first end of the second push plate 222 are stacked and hinged together by a pin. The second push plate 222 is entirely disposed in the first clearance groove 200f. The first clearance groove 200f is used to provide movement for the swing of the second push plate 222. Specifically, the space provides room for the second pusher 222 to swing freely in the horizontal plane. The second end of the second pusher 222 is located within the second hinge hole 200d, and the first end of the serrated blade 223 is also located within the second hinge hole 200d. The first end of the serrated blade 223 and the second end of the second pusher 222 are stacked and hinged together by a pin. The middle part of the serrated blade 223 is located within the second clearance groove 200g, and the middle part of the serrated blade 223 is hinged to the sheet shell 211 by a pin. Together, when the second push plate 222 swings, it can drive the saw blade 223 to swing back and forth around the pin. The second clearance groove 200g is used to provide the swing space for the saw blade 223. Specifically, it can provide the swing space for the saw blade 223 to swing freely in the horizontal plane. At least a part of the saw blade 223 extends to the outside of the sheet shell 211. This part of the saw blade 223 located outside the sheet shell 211 is provided with cutting teeth. The cutting teeth swing to cut external objects.

[0054] like Figure 5 As shown, in this preferred embodiment, the depth of the guide groove 200e is equal to the thickness of the first push piece 221, the depth of the first clearance groove 200f is equal to the thickness of the second push piece 222, and the depth of the second clearance groove 200g is equal to the thickness of the serrated blade 223.

[0055] like Figure 5 As shown, in this embodiment, the saw blade assembly 220 is disposed between two sheet-like shells 211. By providing corresponding guide grooves 200e, hinge holes (i.e., the first hinge hole 200c and the second hinge hole 200d) and clearance grooves (i.e., the first clearance groove 200f and the second clearance tooth groove) in one of the sheet-like shells 211, installation and connection space for the saw blade assembly 220 can be provided in the sheet-like shell 211 to ensure that the two sheet-like shells 211 can be fitted and stacked, minimizing the overall thickness.

[0056] like Figure 6 and Figure 7 As shown, the saw blade fixing module 300 includes a threaded rod 310, a threaded block 320, and a sliding block 330. The threaded rod 310 penetrates the entire main structure 100 along the Z-axis. In this embodiment, the threaded rod 310 extends upward from the third through hole 100e on the inner bottom surface of the positioning groove 100a. A rotating block 311 is provided at the lower end of the threaded rod 310, which facilitates the operator to rotate the threaded rod 310. The threaded block 320 is located above the inner bottom surface of the positioning groove 100a. The threaded rod 310 passes through the threaded block 320 and is threadedly connected to the threaded block 320. When the threaded rod 310 is rotated, the threaded block 320 moves vertically up and down in the Z-axis direction. There are multiple sliding blocks 330, which are arranged around the threaded block 320 in a horizontal circumferential direction. In this embodiment, four sliding blocks 330 are shown, in pairs, located on both sides of the threaded block 320. The sliding blocks 330 and the threaded block 320 are engaged by inclined sliding. The inclined sliding engagement allows the threaded block 320 to move up and down simultaneously, driving the sliding blocks 330 to move in the horizontal direction. Specifically, when the threaded block 320 moves upward, the multiple sliding blocks 330 move closer to the threaded block 320, and conversely, when the threaded block 320 moves downward, the multiple sliding blocks 330 move away from the threaded block 320 and move outward.

[0057] like Figure 8 As shown in this preferred embodiment, the threaded block 320 is provided with a dovetail protrusion 312 on its side, and the sliding block 330 is provided with a dovetail groove 333. The dovetail protrusion 312 is slidably disposed in the dovetail groove 333. The inner side of the dovetail groove 333 is configured as a first inclined surface 334. The first inclined surface 334 has a predetermined angle θ with the height direction (i.e., the Z-axis direction). The predetermined angle ranges from 10 degrees to 40 degrees, preferably from 10 degrees to 20 degrees. The specific value is selected according to the requirements. The dovetail protrusion 312 is provided with a second inclined surface 313. The first inclined surface 334 and the second inclined surface 313 keep in close contact to form a wedge fit. Therefore, when the threaded block 320 moves up and down, the sliding block 330 moves closer to or away from the threaded block 320 in the horizontal direction.

[0058] like Figure 8As shown, in this preferred embodiment, the sliding block 330 includes a sliding body 331 and a pressing part 332. The sliding body 331 is slidably disposed on the inner bottom surface of the positioning groove 100a, and its sliding direction is configured in the horizontal direction. Specifically, the inner bottom surface of the positioning groove 100a is provided with straight protrusions 340 corresponding to the sliding body 331. The length direction of the straight protrusions 340 is configured in the horizontal direction. The lower end of the sliding body 331 is provided with a straight groove 335. The straight protrusions 340 are slidably disposed in the straight grooves 335. The straight protrusions 340 restrict the sliding body 331 to slide only in the horizontal direction, that is, restrict the sliding body 331 to slide only in the length direction of the straight protrusions 340. Thus, when the threaded block 320 moves up and down, the sliding body 331 can only slide in the horizontal direction. The pressing part 332 is disposed on the upper side of the sliding body 331. The pressing part 332 extends horizontally away from the threaded block 320 and protrudes from the sliding body 331. The lower surface of the pressing part 332 is configured as a horizontal surface, which is used to fit and contact the upper surface of the saw shell 210 (e.g., the surface of the orifice of the mounting hole 200a), thereby restricting the saw shell 210 within the positioning groove 100a, so that the saw shell 210 cannot be disengaged from the positioning groove 100a upward.

[0059] like Figure 9 As shown, in this preferred embodiment, a chamfer 3321 is provided between the lower surface and the outer peripheral surface of the pressing part 332 so that the pressing part 332 will not interfere with the inner peripheral wall of the mounting hole 200a when it moves toward the orifice surface of the mounting hole 200a.

[0060] like Figure 9 As shown, in this preferred embodiment, the lower surface of the pressing part 332 and the inner bottom surface of the positioning groove 100a (the straight line L represents the height position of the inner bottom surface of the positioning groove) have a predetermined gap H in the height direction. The predetermined gap H is less than the thickness of the saw shell 210, and preferably the predetermined gap is 0.9 to 0.99 times the thickness of the saw shell 210, for example, 0.95 times or 0.97 times. In this embodiment, the predetermined gap is designed to be slightly less than the thickness of the saw shell 210 so that the pressing part 332 can tightly press the saw shell 210 into the positioning groove 100a, ensuring the stability of the saw shell 210 during operation.

[0061] like Figure 8As shown, in this embodiment, when the saw shell 210 of the saw blade module 200 is installed in the positioning groove 100a, the mounting hole 200a of the saw shell 210 is fitted around the periphery of the plurality of sliding blocks 330. When the threaded block 320 moves downward, the pressing part 332 of the sliding block 330 gradually moves to above the surface of the mounting hole 200a. When the threaded block 320 moves upward, the pressing part 332 of the sliding block 330 gradually moves away from the surface of the mounting hole 200a until the pressing part 332 of the sliding block 330 is completely retracted to directly above the mounting hole 200a, so that the saw shell 210 can detach upward from the sliding block 330. Preferably, in this embodiment, the mounting hole 200a, the threaded rod 310, and the threaded block 320 are concentrically arranged.

[0062] The driver module 400 in this embodiment has two structural forms:

[0063] The first type, such as Figure 10 and Figure 11As shown: The drive module 400 includes a power input shaft 410, a spatial cam 420, a roller 430, a sliding frame 440, and a drive rod 450. The power input shaft 410 is disposed in the cavity 100b of the main structure 100 along the X-axis direction, and the power input shaft 410 is rotatably disposed in the cavity 100b so that the power input shaft 410 can rotate about its axis. The left end of the power input shaft 410 is used to connect to an external power unit such as a motor or other existing technology, preferably to the first transmission in patent CN116983028A. The power input shaft 410 is connected to a moving shaft. A spatial cam 420 is fixedly installed at the right end of the power input shaft 410. The spatial cam 420 is coaxially and fixedly connected to the power input shaft 410. The spatial cam 420 has two axial end faces, each of which includes two helical surfaces 421. The two helical surfaces 421 are connected end to end to form a closed continuous surface. This closed continuous surface is used to drive the roller 430 to reciprocate in the axial direction (i.e., the X-axis direction) of the power input shaft 410. In this embodiment, there are two rollers 430. The two rollers 430 are spaced apart and rotatably mounted on the sliding frame 4. On the 40, a spatial cam 420 is positioned between two rollers 430, and the outer peripheral surface of the rollers 430 rolls in contact with the axial end face (i.e., the closed continuous surface) of the spatial cam 420. Therefore, when the spatial cam 420 is driven to rotate by the power input shaft 410, the closed continuous surface pushes the two rollers 430 and the sliding frame 440 connected to the rollers 430 to reciprocate in the X-axis direction. In this embodiment, the sliding frame 440 is preferably slidably disposed within the cavity 100b of the main structure 100 via a limiting slide (not shown), limiting the movement of the rollers. The slide rail is used to restrict the sliding frame 440 to only make linear movements in the axial direction (i.e., the X-axis direction) of the power input shaft 410. The lower end of the drive rod 450 is fixedly set at the right end of the sliding frame 440. The drive rod 450 passes through the second through hole 100d of the main structure 100 upward in the Z-axis direction. The second through hole 100d has a certain length in the X-axis direction so that the drive rod 450 can reciprocate in the X-axis direction. The upper end of the drive rod 450 passes upward into the connecting hole 200b of the saw shell 210 and the drive hole 221a of the first push plate 221. The working principle of the drive module 400 is as follows: the space cam 420 rotates and drives the roller 430 and the sliding frame 440 to reciprocate in the X-axis direction. The drive rod 450 follows the sliding frame 440 to reciprocate. When the drive rod 450 reciprocates, it drives the first push plate 221 to reciprocate in the guide groove 200e. The first push plate 221 drives the second push plate 222 to swing. When the second push plate 222 swings, it drives the saw blade 223 to swing. The saw blade 223 then cuts the external object.

[0064] The second type, such as Figure 12As shown: The drive module 400 includes a power input shaft 410, a cylindrical cam 460, a roller 470, a sliding frame 440, and a drive rod 450. The power input shaft 410 is disposed in the cavity 100b of the main structure 100 along the X-axis direction, and the power input shaft 410 is rotatably disposed in the cavity 100b so that the power input shaft 410 can rotate around its axis. The left end of the power input shaft 410 is used to connect with an external power unit such as a motor or other existing technology, preferably connected with the first transmission shaft in patent CN116983028A. The right end of the power input shaft 410 is provided with a cylindrical cam 460, which is coaxially fixed with the power input shaft 410. The outer circumferential surface of the cylindrical cam 460 is provided with two helical grooves 461, which are helically formed around the power input shaft 410, and the two helical grooves 461 are connected end to end to form a closed annular groove. The roller 470 is rotatably disposed within the cavity 100b. The roller 470 is placed on the sliding frame 440, and its outer circumferential surface rolls in contact with the inner surface of the annular groove. When the cylindrical cam 460 rotates, the inner wall of the annular groove pushes the roller 470 to reciprocate in the axial direction (i.e., the X-axis direction) of the power input shaft 410. In this embodiment, the sliding frame 440 is preferably slidably disposed in the cavity 100b of the main structure 100 through a limiting slide (not shown). The limiting slide is used to restrict the sliding frame 440 to only move in the power input shaft 410. The drive rod 450 moves linearly along the axial direction (i.e., the X-axis direction). The lower end of the drive rod 450 is fixedly set at the right end of the sliding frame 440. The drive rod 450 passes upward along the Z-axis direction through the second through hole 100d of the main structure 100. The second through hole 100d has a certain length in the X-axis direction so that the drive rod 450 can move in the X-axis direction. The upper end of the drive rod 450 passes upward into the connecting hole 200b of the saw shell 210 and the drive hole 221a of the first push plate 221. The working principle of the drive module 400 is as follows: the cylindrical cam 460 rotates, and the inner wall of the spiral groove 461 pushes the roller 470 and the sliding frame 440 to reciprocate in the X-axis direction. The drive rod 450 follows the sliding frame 440 to reciprocate. When the drive rod 450 reciprocates, it drives the first push plate 221 to reciprocate in the guide groove 200e. The first push plate 221 drives the second push plate 222 to swing. When the second push plate 222 swings, it drives the saw blade 223 to swing, and the saw blade 223 cuts the external object.

[0065] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A swing saw, characterized in that The utility model relates to a sawing machine, including: a main body structure (100) provided with a positioning groove (100a) along the Z-axis direction; a saw blade module (200) including a saw shell (210) and a saw blade assembly (220) movably arranged in the saw shell (210), the first end of the saw shell (210) is arranged in the positioning groove (100a), the outer peripheral surface of the first end of the saw shell (210) is attached to the inner peripheral surface of the positioning groove (100a), the first end of the saw shell (210) is provided with a mounting hole (200a) and a connecting hole (200b), the first end of the saw blade assembly (220) is arranged in the connecting hole (200b), the first end of the saw blade assembly (220) is provided with a driving hole (221a), and the second end of the saw blade assembly (220) is used for cutting external objects; a saw blade fixing module (300) including a threaded rod (310), a threaded block (320) and a sliding block (330), the threaded rod (310) is rotatably arranged in the main body structure (100), the threaded block (320) is threadedly connected with the threaded rod (310), a plurality of sliding blocks (330) are arranged around the threaded block (320), the mounting hole (200a) of the saw shell (210) is sleeved on the outside of the plurality of sliding blocks (330), the sliding block (330) includes a sliding body (331) and a pressing portion (332) arranged on the sliding body (331), the sliding body (331) is slidably connected in the positioning groove (100a) along the horizontal direction, the sliding body (331) is slidably connected with the threaded block (320) through a slope, for realizing that the threaded block (320) drives the plurality of sliding blocks (330) to retract and expand along the horizontal direction, and the pressing portion (332) expands to the hole mouth surface of the mounting hole (200a) to press the saw shell (210); a driving module (400) including a driving rod (450) for driving the saw blade assembly (220) to move, the driving rod (450) passes through the driving hole (221a) of the saw blade assembly (220) along the Z-axis direction, for driving the saw blade assembly (220) to move to realize the cutting of external objects.

2. A swing saw according to claim 1, wherein The main body structure (100) is internally provided with a cavity (100b), one side of the main body structure (100) is provided with a first through hole (100c), the inner bottom surface of the positioning groove (100a) is respectively provided with a second through hole (100d) and a third through hole (100e); the driving module (400) is arranged in the cavity (100b), the power input shaft (410) of the driving module (400) passes through the first through hole (100c), and the driving rod (450) of the driving module (400) passes through the second through hole (100d) upwards; the threaded rod (310) of the saw blade fixing module (300) passes through the third through hole (100e) upwards.

3. The oscillating hacksaw of claim 1, wherein, The saw shell (210) of the saw blade module (200) includes two sheet-shaped shells (211) arranged in layers, and the saw blade assembly (220) is arranged between the two sheet-shaped shells (211).

4. The swing saw according to claim 3, wherein Two sheet shells (211) are respectively provided with mounting holes (200a), connecting holes (200b), first hinge holes (200c) and second hinge holes (200d) along the length direction thereof; the sheet shell (211) is further provided with a guide sliding groove (200e), a first avoiding groove (200f) and a second avoiding groove (200g), the guide sliding groove (200e) is respectively connected with the connecting hole (200b) and the first hinge hole (200c), and the first avoiding groove (200f) is respectively connected with the first hinge hole (200c) and the second hinge hole (200d); The saw blade assembly (220) comprises a first push piece (221), a second push piece (222) and a saw blade (223) for cutting; the first push piece (221) is arranged in the guide sliding groove (200e), the guide sliding groove (200e) is used for guiding the first push piece (221) in the length direction of the sheet shell (211), the first end of the first push piece (221) is arranged in the connecting hole (200b), the first end of the first push piece (221) is provided with the driving hole (221a), the second end of the first push piece (221) is hingedly connected with the first end of the second push piece (222) in the first hinge hole (200c), the second push piece (222) is arranged in the first avoiding groove (200f), the first avoiding groove (200f) is used for avoiding the horizontal swinging of the second push piece (222), the second end of the second push piece (222) is hingedly connected with the first end of the saw blade (223), the middle part of the saw blade (223) is hingedly connected with the sheet shell (211) through a pin shaft, and the saw blade (223) is arranged in the second avoiding groove (200g), and the second avoiding groove (200g) is used for avoiding the horizontal swinging of the saw blade (223).

5. The oscillating hacksaw of claim 1 wherein, The threaded rod (310) penetrates the main body structure (100) along the Z-axis direction, and the lower end of the threaded rod (310) is provided with a rotating block (311).

6. The oscillating hacksaw of claim 1 wherein, The threaded block (320) is provided with a dovetail protrusion (312), the sliding body (331) of the sliding block (330) is provided with a dovetail groove (333), the dovetail protrusion (312) is slidingly arranged in the dovetail groove (333), the inner side surface of the dovetail groove (333) is configured as a first inclined surface (334), the first inclined surface (334) has a predetermined included angle (θ) with the Z-axis direction θ The dovetail protrusion (312) is provided with a second inclined surface (313) in sliding contact with the first inclined surface (334), when the first inclined surface (334) and the second inclined surface (313) slide relative to each other, the sliding body (331) moves along the horizontal direction to approach or move away from the threaded block (320).

7. A swing saw according to claim 6 wherein, The inner bottom surface of the positioning groove (100a) is provided with a straight strip protrusion (340), the length direction of the straight strip protrusion (340) is parallel to the horizontal plane, the bottom of the sliding body (331) is provided with a straight line groove (335), the straight strip protrusion (340) is slidingly arranged in the straight line groove (335), and the straight strip protrusion (340) is used for limiting the sliding body (331) to be able to slide only in the length direction of the straight strip protrusion (340).

8. The oscillating hacksaw of claim 6 wherein, The lower pressing part (332) of the sliding block (330) protrudes from the sliding body (331) along the horizontal direction, an inclined surface (3321) is arranged between the lower surface and the outer peripheral surface of the lower pressing part (332), the lower surface of the lower pressing part (332) and the inner bottom surface of the positioning groove (100a) have a predetermined gap (H) in the Z-axis direction, and the predetermined gap (H) is smaller than the thickness of the saw shell (210).

9. The oscillating hacksaw of claim 1 wherein, The driving module (400) comprises a power input shaft (410), a space cam (420), a roller (430), a sliding frame (440) and a driving rod (450). The power input shaft (410) is rotationally arranged in the main body structure (100), and the space cam (420) is sleeved on the power input shaft (410); the axial end surface of the space cam (420) comprises two helical surfaces (421) extending axially around the power input shaft (410), and the two helical surfaces (421) are connected end to end to form a closed continuous surface for driving the roller I (430) to reciprocate axially; the two roller Is (430) are rotationally arranged on the sliding frame (440) and are located on the two sides of the space cam (420) respectively, the outer circumferential surface of the roller I (430) is in rolling contact with the axial end surface of the space cam (420), the roller I (430) is driven to reciprocate axially by the rotation of the space cam (420), the sliding frame (440) is axially slidably arranged in the main body structure (100), the lower end of the driving rod (450) is fixedly arranged on the sliding frame (440), and the upper end of the driving rod (450) penetrates through the driving hole (221a) of the saw blade assembly (220).

10. The oscillating hacksaw of claim 1 wherein, The driving module (400) comprises a power input shaft (410), a cylindrical cam (460), a roller II (470), a sliding frame (440) and a driving rod (450); The power input shaft (410) is arranged in the main body structure (100), and the cylindrical cam (460) is sleeved on the power input shaft (410); the cylindrical cam (460) is provided with two helical grooves (461) extending axially around the power input shaft (410), and the two helical grooves (461) are connected end to end to form an annular groove for driving the roller II (470) to reciprocate axially, the roller II (470) is rotationally arranged on the sliding frame (440), and the outer circumferential surface of the roller II (470) is in rolling contact with the inner side surface of the annular groove, the roller II (470) is driven to reciprocate axially by the rotation of the cylindrical cam (460), the sliding frame (440) is axially slidably arranged in the main body structure (100), the lower end of the driving rod (450) is arranged on the sliding frame (440), and the upper end of the driving rod (450) penetrates through the driving hole (221a) of the saw blade assembly (220).

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