miter saw

Abstract

This invention discloses a miter saw, belonging to the field of power tool technology. It includes a base, a worktable, a cutting mechanism, and a linkage mechanism. The worktable is mounted on the base. The cutting mechanism includes a frame and a circular saw blade connected to the frame. The linkage mechanism includes a first mounting base, a second mounting base, and a linkage assembly disposed between the first and second mounting bases. The first mounting base is connected to the frame, and the second mounting base is connected to the worktable. The linkage assembly includes at least two connecting rods, adjacent connecting rods being rotatably connected via a connecting seat. A support is provided between adjacent connecting rods, the support being slidably connected to the connecting seat and movably connected to adjacent connecting rods. During deployment, the support unfolds with the linkage assembly; during retraction, the support retracts with the linkage assembly. When the cutting mechanism stops at a certain position, the adjacent connecting rods self-lock under the support of the support. The linkage mechanism has a simple structure and is lightweight, reducing the overall weight of the machine.

Description

Technical Field

[0001] This invention relates to the field of power tool technology, and more particularly to a miter saw. Background Technology

[0002] A miter saw is a commonly used power tool, which mainly consists of a base, a worktable, and a cutting mechanism. The base and worktable can pivot about a vertical axis. The cutting mechanism is located above the worktable and is connected to the worktable by a connecting component. The cutting mechanism can move relative to the worktable in the front-back direction and can also rotate about a vertical axis with the worktable.

[0003] Typically, the connecting component is a guide rail assembly located between the cutting mechanism and the worktable, allowing the cutting mechanism to move linearly along the guide rail. The cutting mechanism has an extended state and a retracted state. In the extended state, the guide rail is located above the worktable; in the retracted state, the guide rail is located at the rear of the machine. This requires a certain amount of space at the rear of the machine to accommodate the guide rail, preventing the miter saw from being placed close to a wall and thus occupying a significant amount of lateral space.

[0004] In some miter saws, hinge mechanisms replace guide rail assemblies. The hinge mechanism is positioned between the cutting mechanism and the worktable. It can be extended and retracted; in the retracted state, the hinge mechanism is clamped between the cutting mechanism and the worktable, without occupying rear space. Existing hinge mechanisms typically use horizontal and vertical links, with upper limits in both directions. These horizontal and vertical links are mostly solid block structures, resulting in significant weight and increasing the overall machine weight. Summary of the Invention

[0005] The purpose of this invention is to provide a miter saw to solve the technical problem of the large weight of the hinge mechanism in the prior art.

[0006] Based on the above concept, the technical solution adopted by this invention is as follows:

[0007] A miter saw, comprising:

[0008] Base;

[0009] A workbench is provided on the base;

[0010] A cutting mechanism, comprising a frame and a circular saw blade connected to the frame;

[0011] A linkage mechanism includes a first mounting base, a second mounting base, and a linkage assembly disposed between the first mounting base and the second mounting base. The first mounting base is connected to the frame, and the second mounting base is connected to the worktable.

[0012] The linkage assembly includes at least two linkage parts, adjacent linkage parts are rotatably connected by a connecting seat, a support part is provided between adjacent linkage parts, the support part is slidably connected to the connecting seat, and the support part is movably connected to adjacent linkage parts;

[0013] During the unfolding process, the support part unfolds along with the connecting rod assembly. During the retraction process, the support part retracts along with the connecting rod assembly. When the cutting mechanism stops at a certain position, the adjacent connecting rod parts self-lock under the support of the support part.

[0014] The linkage assembly includes two linkage sections, namely a front linkage section and a rear linkage section. The front linkage section includes at least two front linkages arranged in parallel and spaced apart, and the rear linkage section includes at least two rear linkages arranged in parallel and spaced apart.

[0015] The front linkage includes three front linkages arranged in parallel at intervals: a first front linkage, a second front linkage, and a third front linkage. The axes of the first front linkage and the second front linkage coincide and they share a first front pivot and a second front pivot.

[0016] The first front pivot and the second front pivot define a first plane, and the third front connecting rod is located below the first plane.

[0017] The rear linkage includes three rear linkages arranged in parallel at intervals: a first rear linkage, a second rear linkage, and a third rear linkage. The axes of the first rear linkage and the second rear linkage coincide and they share a first rear pivot and a second rear pivot.

[0018] The first rear pivot and the second rear pivot define a second plane, and the third rear connecting rod is located below the second plane.

[0019] The support portion includes a support base, a first support rod, and a second support rod. The support base is slidably connected to the connecting base. One end of the first support rod is rotatably connected to the support base, and the other end of the first support rod is movably connected to one of the connecting rod portions. One end of the second support rod is rotatably connected to the support base, and the other end of the second support rod is movably connected to another of the connecting rod portions.

[0020] The connecting rod portion is slidably provided with a slider, and the first support rod is hinged to the slider.

[0021] The connecting seat is fixedly provided with a guide post, and the support seat is sleeved on the guide post and slidably connected to the guide post.

[0022] The guide post is threadedly connected to the connecting seat.

[0023] The beneficial effects of this invention are:

[0024] The miter saw proposed in this invention connects the worktable and the cutting mechanism via a linkage mechanism. The linkage mechanism includes a first mounting base, a second mounting base, and a linkage assembly disposed between the first and second mounting bases. The movement of the cutting mechanism is transmitted to the linkage assembly through the first mounting base, allowing the linkage assembly to switch between an extended and retracted state. The linkage assembly includes at least two connecting rods, adjacent connecting rods being rotatably connected via a connecting seat. A support is provided between adjacent connecting rods, the support being slidably connected to the connecting seat and movably connected to adjacent connecting rods. During extension, the support extends with the linkage assembly; during retraction, the support retracts with the linkage assembly. When the cutting mechanism stops at a certain position, the adjacent connecting rods self-lock under the support of the support, preventing relative rotation. The linkage mechanism has a simple structure and is lightweight, reducing the overall weight of the machine. Attached Figure Description

[0025] Figure 1 This is a front view of the miter saw provided in the embodiment of the present invention in its unfolded state;

[0026] Figure 2 This is a top view of the miter saw provided in an embodiment of the present invention;

[0027] Figure 3 This is a front view of the miter saw provided in the embodiment of the present invention in its stowed state;

[0028] Figure 4 This is a front view of the linkage mechanism provided in an embodiment of the present invention;

[0029] Figure 5 This is an exploded structural diagram of the linkage mechanism provided in an embodiment of the present invention;

[0030] Figure 6 yes Figure 5 A partial structural schematic diagram of the linkage mechanism is provided.

[0031] Figure 7 This is a partial structural exploded view of the linkage mechanism provided in an embodiment of the present invention.

[0032] In the picture:

[0033] 10. Base;

[0034] 20. Workbench; 201. First axis; 202. Support surface;

[0035] 30. Cutting mechanism; 31. Frame; 32. Circular saw blade;

[0036] 40. Linkage mechanism; 401. First plane; 402. Second plane;

[0037] 41. First mounting base;

[0038] 42. Second mounting bracket;

[0039] 43. Linkage assembly;

[0040] 431. Front link section; 4311. First front link; 4312. Second front link; 4313. Third front link; 4314. First front pivot; 4315. Second front pivot; 4316. Third front pivot;

[0041] 432. Rear link section; 4321. First rear link; 4322. Second rear link; 4323. Third rear link; 4324. First rear pivot; 4325. Second rear pivot; 4326. Third rear pivot;

[0042] 433. Connecting seat;

[0043] 434. Guide column;

[0044] 44. Support part; 441. Support base; 442. First support rod; 443. Second support rod. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0049] See Figures 1 to 7 This invention provides a miter saw, including a base 10, a worktable 20, a cutting mechanism 30, and a linkage mechanism 40. The base 10 provides support, allowing the entire miter saw to be stably placed on the ground or an operating surface. The worktable 20 is mounted on the base 10 and has a support surface 202 for placing the workpiece. The worktable 20 is rotatably connected to the base 10, and miter cutting is achieved when the worktable 20 rotates around the base 10 by the required angle. The cutting mechanism 30 is rotatably connected to the worktable 20, and the cutting angle can be changed when the cutting mechanism 30 rotates relative to the worktable 20 by the required angle. The linkage mechanism 40 is disposed between the cutting mechanism 30 and the worktable 20.

[0050] Specifically, the cutting mechanism 30 is rotatable relative to the worktable 20 about a first axis 201, and the worktable 20 is rotatable relative to the base 10 about a second axis, which is perpendicular to the first axis 201. When the miter saw is placed on the ground or an operating surface, the first axis 201 is horizontal and the second axis is vertical.

[0051] The cutting mechanism 30 includes a frame 31 and a circular saw blade 32 connected to the frame 31. The circular saw blade 32 extends in a cutting plane. When the cutting mechanism 30 rotates at the required angle relative to the worktable 20, the cutting plane forms a certain angle with respect to the support surface 202.

[0052] The linkage mechanism 40 includes a first mounting base 41, a second mounting base 42, and a linkage assembly 43 disposed between the first mounting base 41 and the second mounting base 42. The first mounting base 41 is connected to the frame 31, and the second mounting base 42 is connected to the worktable 20.

[0053] The workbench 20 has a rear seat and a locking element at its rear end. The second mounting base 42 is rotatably connected to the rear seat and can rotate relative to the rear seat around the first axis 201. The locking element is configured to lock the second mounting base 42 to the rear seat. The angle of the second mounting base 42 relative to the rear seat is adjustable.

[0054] Specifically, a support shaft is provided on the rear seat, and a second mounting base 42 is fitted onto the support shaft. A locking element is threadedly connected to the support shaft. The locking element is a nut, which is easily installed and removed via a threaded connection. When it is necessary to adjust the cutting angle, simply loosen the locking element without disassembling it to change the cutting angle.

[0055] The linkage assembly 43 can be deployed and retracted, meaning it has both deployed and retracted states, allowing the cutting mechanism 30 to move forward or backward. In the deployed state, the linkage assembly 43 supports the cutting mechanism 30 in any position; in the retracted state, the linkage assembly 43 occupies less space.

[0056] The linkage assembly 43 includes at least two linkage parts, which are rotatably connected by a connecting seat 433. A support part 44 is provided between the adjacent linkage parts, and the support part 44 is slidably connected to the connecting seat 433. The support part 44 is also movably connected to the adjacent linkage parts. During deployment, the support part 44 unfolds with the linkage assembly 43, and during retraction, the support part 44 retracts with the linkage assembly 43. When the cutting mechanism 30 stops at a certain position, the adjacent linkage parts self-lock under the support of the support part 44. During self-locking, there is no relative rotation between the adjacent linkage parts, so the cutting mechanism 30 can be suspended. The linkage mechanism 40 has a simple structure and is lightweight, reducing the overall weight of the machine.

[0057] The support part 44 includes a support base 441, a first support rod 442 and a second support rod 443. The support base 441 is slidably connected to the connecting base 433. One end of the first support rod 442 is rotatably connected to the support base 441, and the other end of the first support rod 442 is movably connected to a connecting rod. One end of the second support rod 443 is rotatably connected to the support base 441, and the other end of the second support rod 443 is movably connected to another connecting rod.

[0058] During the unfolding of the linkage assembly 43, the included angle between adjacent linkages increases, the support base 441 slides toward the connecting base 433, the first support rod 442 rotates around the support base 441, and the connecting end of the first support rod 442 slides along the connecting rod. At the same time, the second support rod 443 rotates around the support base 441, and the connecting end of the second support rod 443 slides along the connecting rod. The included angle between the first support rod 442 and the second support rod 443 increases.

[0059] When the cutting mechanism 30 stops at a certain position, one end of the first support rod 442 is supported by the support seat 441, and the other end of the first support rod 442 supports a connecting rod part. One end of the second support rod 443 is supported by the support seat 441, and the other end of the second support rod 443 supports another connecting rod part, so that the adjacent connecting rod parts are self-locking.

[0060] The first support rod 442 and the connecting rod can be rotatably connected, specifically, through a rotating shaft; alternatively, a slider can be slidably mounted on the connecting rod, with the first support rod 442 hinged to the slider. During the unfolding of the connecting rod assembly 43, the angle between adjacent connecting rods increases, the support base 441 slides towards the connecting base 433, the first support rod 442 rotates around the support base 441, and the slider slides along the connecting rod, causing the connection end between the first support rod 442 and the connecting rod to slide along the connecting rod.

[0061] The second support rod 443 and the connecting rod can be rotatably connected, specifically, rotatably connected via a rotating shaft; or the second support rod 443 can be hinged to the slider on the connecting rod, and the first support rod 442 and the second support rod 443 can be hinged to the sliders on adjacent connecting rods respectively.

[0062] A guide post 434 is fixedly mounted on the connecting seat 433, and a support seat 441 is sleeved on the guide post 434 and slidably connected to the guide post 434. During the unfolding of the connecting rod assembly 43, the included angle between adjacent connecting rod parts increases, and the support seat 441 slides along the guide post 434 toward the connecting seat 433.

[0063] The guide post 434 is threadedly connected to the connecting seat 433, which facilitates installation and disassembly.

[0064] In this embodiment, the linkage assembly 43 includes two linkage sections: a front linkage section 431 and a rear linkage section 432. The front linkage section 431 includes at least two front linkages arranged in parallel and spaced apart, and the rear linkage section 432 includes at least two rear linkages arranged in parallel and spaced apart. By setting the front linkage section 431 as a front linkage with parallel and spaced apart, rather than a solid structure, the weight of the front linkage section 431 is reduced. Similarly, by setting the rear linkage section 432 as a rear linkage with parallel and spaced apart, rather than a solid structure, the weight of the rear linkage section 432 is reduced.

[0065] Specifically, the front link section 431 includes three front links arranged in parallel at intervals: a first front link 4311, a second front link 4312, and a third front link 4313. The axes of the first front link 4311 and the second front link 4312 coincide and they share a first front pivot 4314 and a second front pivot 4315. Further, the first front link 4311 and the second front link 4312 can be configured as a single unit. The first front pivot 4314 is rotatably connected to the connecting seat 433, and the second front pivot 4315 is rotatably connected to the first mounting seat 41. A first slider is provided on the first front link 4311, and a first support rod 442 is hinged to the first slider.

[0066] One end of the third front connecting rod 4313 is rotatably connected to the connecting seat 433 via the third front pivot 4316, and the other end is rotatably connected to the first mounting seat 41 via the fourth front pivot. The third front pivot 4316 is parallel to and spaced apart from the first front pivot 4314, and the fourth front pivot is parallel to and spaced apart from the second front pivot 4315.

[0067] The first front pivot 4314 and the second front pivot 4315 define the first plane 401, and the third front link 4313 is located below the first plane 401, making full use of space and making the structure compact. The arrangement of the first front link 4311, the second front link 4312 and the third front link 4313 forms a stable triangular structure, which makes the movement of the link assembly 43 smooth.

[0068] The structure of the rear link section 432 is basically the same as that of the front link section 431. The rear link section 432 includes three rear links arranged in parallel at intervals: a first rear link 4321, a second rear link 4322, and a third rear link 4323. The axes of the first rear link 4321 and the second rear link 4322 coincide and they share a first rear rotating shaft 4324 and a second rear rotating shaft 4325. The first rear rotating shaft 4324 is rotatably connected to the connecting seat 433, and the second rear rotating shaft 4325 is rotatably connected to the second mounting seat 42. A second slider is provided on the first rear link 4321, and the second support rod 443 is hinged to the second slider.

[0069] One end of the third rear connecting rod 4323 is rotatably connected to the connecting seat 433 via the third rear rotating shaft 4326, and the other end is rotatably connected to the second mounting seat 42 via the fourth rear rotating shaft. The third rear rotating shaft 4326 is parallel to and spaced apart from the first rear rotating shaft 4324, and the fourth rear rotating shaft is parallel to and spaced apart from the second rear rotating shaft 4325.

[0070] The first rear pivot 4324 and the second rear pivot 4325 define the second plane 402. The third rear link 4323 is located below the second plane 402, making full use of space and resulting in a compact structure. The arrangement of the first rear link 4321, the second rear link 4322, and the third rear link 4323 forms a stable triangular structure, which makes the movement of the link assembly 43 smooth.

[0071] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. Misalignment saw, including: Base; A workbench is provided on the base; A cutting mechanism, comprising a frame and a circular saw blade connected to the frame; A linkage mechanism includes a first mounting base, a second mounting base, and a linkage assembly disposed between the first mounting base and the second mounting base. The first mounting base is connected to the frame, and the second mounting base is connected to the worktable. The linkage assembly is characterized in that it includes at least two linkage portions, adjacent linkage portions are rotatably connected by a connecting seat, a support portion is provided between adjacent linkage portions, the support portion is slidably connected to the connecting seat, and the support portion is movably connected to adjacent linkage portions. During the unfolding process, the support part unfolds along with the connecting rod assembly; during the retraction process, the support part retracts along with the connecting rod assembly. When the cutting mechanism stops at a certain position, the adjacent connecting rod parts self-lock under the support of the support part. The support includes a support base, a first support rod, and a second support rod. The support base is slidably connected to the connecting base. One end of the first support rod is rotatably connected to the support base, and the other end of the first support rod is movably connected to one of the connecting rods. One end of the second support rod is rotatably connected to the support base, and the other end of the second support rod is movably connected to another of the connecting rods.

2. The miter saw according to claim 1, characterized in that, The linkage assembly includes two linkage sections, namely a front linkage section and a rear linkage section. The front linkage section includes at least two front linkages arranged in parallel and spaced apart, and the rear linkage section includes at least two rear linkages arranged in parallel and spaced apart.

3. The miter saw according to claim 2, characterized in that, The front linkage includes three front linkages arranged in parallel at intervals, namely a first front linkage, a second front linkage, and a third front linkage. The axes of the first front linkage and the second front linkage coincide and they share a first front pivot and a second front pivot.

4. The miter saw according to claim 3, characterized in that, The first front pivot and the second front pivot define a first plane, and the third front link is located below the first plane.

5. The miter saw according to claim 2, characterized in that, The rear linkage includes three rear linkages arranged in parallel at intervals, namely a first rear linkage, a second rear linkage, and a third rear linkage. The axes of the first rear linkage and the second rear linkage coincide and they share a first rear pivot and a second rear pivot.

6. The miter saw according to claim 5, characterized in that, The first rear pivot and the second rear pivot define a second plane, and the third rear connecting rod is located below the second plane.

7. The miter saw according to claim 1, characterized in that, A slider is slidably mounted on the connecting rod, and the first support rod is hinged to the slider.

8. The miter saw according to claim 1, characterized in that, A guide post is fixedly installed on the connecting seat, and the support seat is sleeved on the guide post and slidably connected to the guide post.

9. The miter saw according to claim 8, characterized in that, The guide post is threadedly connected to the connecting seat.

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