A miter saw

Abstract

The application discloses a miter saw, comprising a cutting assembly, a base provided with a guide rail groove, a support arm, a guide mechanism formed by a plurality of guide arms being sequentially hinged, the guide mechanism being connected between the upper part of the support arm and the cutting assembly, the guide mechanism being capable of stretching or being folded to the support arm so as to make the cutting assembly move away from or close to the support arm in the horizontal direction, and further comprising a limiting rod rotatably connected to one side of the support arm, the limiting rod being provided with a sliding rail, the guide mechanism being provided with a sliding piece, the sliding piece being slidably connected with the sliding rail so as to make the cutting assembly move along the guide rail groove. The combination of the guide mechanism and the limiting rod can rigidly limit the cutting assembly in multiple directions, the cutting assembly can move along the set direction and track, the cutting assembly will not shake and deviate when cutting the plate, the cutting precision is high, the guide rod will not occupy the space behind the miter saw, the occupied space of the miter saw as a whole is reduced, and the miter saw is convenient to store and place.

Description

Technical Field

[0001] This invention belongs to the field of power tools, and specifically relates to a miter saw. Background Technology

[0002] As a processing tool for wood and metal profiles, miter saws are widely used in frame design, decorative molding, and profile cutting. To meet the cutting needs of wide workpieces, miter saws generally have a sliding cutting head to achieve forward and backward feeding.

[0003] Currently, existing technologies typically employ the following two sliding structures: 1. The cutting head slides on a linear guide rod; this structure relies on the cooperation of a high-precision polished steel rod and precision bearings, requiring high machining accuracy and resulting in high manufacturing costs. Furthermore, because the linear guide rod needs to extend a considerable distance behind the beveling saw, it occupies a large space, making it bulky and inconvenient to place. 2. Multiple hinges fold and unfold to achieve vertical and horizontal sliding of the cutting head; this structure lacks multi-directional rigid restraint, making the cutting head prone to wobbling during operation, leading to deviation during cutting and resulting in poor cutting accuracy. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a beveling saw to solve the problem of the cutting head easily shaking during operation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a miter saw, comprising: a cutting assembly for cutting sheet metal; a base having a guide rail groove for avoiding the cutting assembly; a support arm disposed on the base and extending upward from the base; a guiding mechanism, wherein multiple guide arms are sequentially hinged by a longitudinally extending hinge shaft to form a guiding mechanism, one end of the guiding mechanism is rotatably connected to the upper part of the support arm via a first rotating shaft parallel to the hinge shaft, and the other end is connected to the cutting assembly; the guiding mechanism extends or retracts towards the support arm to move the cutting assembly away from or closer to the support arm in the horizontal direction; and further comprising: a limiting rod rotatably connected to one side of the support arm via a second rotating shaft, the limiting rod having a slide rail, and a sliding member on the guide arm connected to the cutting assembly, the sliding member limiting the cutting direction of the cutting assembly by sliding connection with the slide rail, so that the cutting assembly moves along the guide rail groove. This technical solution has the following technical effects: This invention provides a guide mechanism and a limiting rod on a miter saw. The guide mechanism is connected between the cutting assembly and the support arm. It can limit the cutting assembly installed at the end of the guide mechanism in the vertical direction by moving only in the horizontal direction. This allows the cutting assembly installed at the end of the guide mechanism to move on the horizontal plane defined by the guide mechanism. Because the guide arm connected to the cutting assembly is slidably connected to the guide rail on the limiting rod through a sliding member, the guide rail can limit the extension and retraction direction of the guide mechanism on the horizontal plane through the sliding member. This makes the cutting direction of the cutting assembly coincide with the extension direction of the guide rail groove, so as to cut the plate along the guide rail groove. The combination of the guide mechanism and the limiting rod can rigidly limit the cutting component in multiple directions, allowing the cutting component to move along the set direction and trajectory to cut the board. The cutting component will not shake or deviate when cutting the board, and the cutting accuracy is high. When the cutting component slides forward, one end of the guide rod is rotatably connected to the support arm. When the other end extends forward, it is set up side by side with the guide mechanism. That is, the guide rod is located on the side of the miter saw, not at the rear of the miter saw. Therefore, the guide rod will not occupy the space at the rear of the miter saw, thereby reducing the overall space occupied by the miter saw and making it easier to store and place the miter saw.

[0006] In the aforementioned type of miter saw, the slide rail is a sliding hole, and the sliding component passes through the sliding hole for slidable connection. By setting the slide rail as a sliding hole, the production and processing of the limit rod only requires drilling a hole in the limit rod to complete the processing. The structure is simple and reliable, the assembly is stable, and the production and processing difficulty is greatly reduced.

[0007] In the aforementioned miter saw, the sliding member includes a sliding portion passing through a sliding hole and a limiting portion located at the end of the sliding portion. The limiting portion abuts against the side of the limiting rod opposite to the guide mechanism. By abutting against the limiting rod, the limiting portion prevents the sliding member from disengaging from the limiting rod along the axial direction of the sliding portion, ensuring that the sliding member can slide stably within the sliding hole, guiding the guide arm on which the sliding member is installed, and thus stably limiting the cutting assembly.

[0008] In the aforementioned miter saw, the sliding hole is closed at both ends in the sliding direction. When the sliding member abuts against the end of the sliding hole, the guide arm with the sliding member stops moving, thereby stopping the cutting assembly mounted on the guide arm. This ensures that the sliding trajectory of the cutting assembly completely coincides with the guide groove, preventing the cutting assembly from crossing the end of the guide groove. It also ensures that the guide groove can always avoid the cutting assembly cutting the sheet metal, preventing the cutting blade from directly contacting the base and causing damage to the cutting blade when cutting the sheet metal.

[0009] In the aforementioned miter saw, the limiting rod includes a first limiting section and a second limiting section with an included angle of less than 180 degrees. The sliding hole includes a first sliding section extending axially along the first limiting section, a second sliding section extending axially along the second limiting section, and a transition section connecting the first and second sliding sections. When the guide mechanism retracts to the support arm side, the sliding member slides from the first sliding section to the second sliding section, causing the limiting rod to swing upward around the second rotating axis. When the user pushes the cutting assembly from a position away from the support arm to a position closer to the support arm to cut the plate, the guide mechanism gradually retracts to the support arm side. At this time, the sliding member slides from the first sliding section through the transition section to the second sliding section. When the sliding member slides within the first sliding section, the first limiting section extends horizontally forward. During the process of the sliding member sliding from the transition section to the second sliding section, the sliding member applies a pushing force to the limiting rod through the inner wall of the sliding hole, thereby pushing the limiting rod to swing upward around the second rotating axis. When the material is cut, the limiting rod has swung to a higher position where the first limiting segment is located on one side of the support arm. That is, when the material is cut or when the material to be cut is placed on the base, the first limiting segment extends upward on one side of the support arm, rather than forward. Therefore, the limiting rod is far away from the material in the vertical direction, which does not easily affect the picking and placing of the material, making the operation more convenient and simple for the user.

[0010] In the aforementioned miter saw, the slide rail is a groove, which is a T-slot, and the sliding member slides into the T-slot. The cross-section of the T-slot is T-shaped, which, through its engagement with the sliding member, prevents the sliding member from freely disengaging from the groove.

[0011] In the aforementioned miter saw, a clearance groove is provided on the side of the support arm facing the guide mechanism. When the guide mechanism retracts to one side of the support arm, all guide arms overlap horizontally, with some guide arms embedded in the clearance groove. Because the guide mechanism occupies some space above the sheet metal when retracted to the side of the support arm, the horizontal overlap of all guide arms reduces the overall space occupied by the guide mechanism. By providing clearance grooves on the support arm, some guide arms can be embedded within these grooves, further reducing the space occupied by the guide mechanism above the sheet metal, preventing the guide mechanism from interfering with the handling of the sheet metal, and facilitating user operation.

[0012] In the aforementioned miter saw, the depth of the clearance groove in the horizontal direction is greater than the thickness of a single guide arm. This allows at least one guide arm to be completely embedded within the clearance groove, minimizing the space occupied by the guide mechanism on the sheet metal while ensuring the strength of the support arm. Simultaneously, the clearance groove provides support to the guide arm embedded within it by abutting against its bottom, thereby supporting the entire guide mechanism, reducing the stress at the connection between the guide mechanism and the support arm, preventing breakage due to excessive stress, and extending the service life of the guide mechanism.

[0013] In the aforementioned miter saw, the lower end of the support arm is rotatably connected to one side of the base via a third rotating shaft, the axis of which coincides with the extension direction of the guide rail groove. That is, the support arm can rotate around the third rotating shaft to cause the guide mechanism, limit rod, and cutting assembly to deflect on the base, thereby achieving miter cutting of the sheet metal. Because the axis of the third rotating shaft coincides with the extension direction of the guide rail groove, the cutting assembly can always be aligned with the guide rail groove at any angle the support arm rotates at the top of the base, ensuring that the guide rail groove always avoids the cutting assembly when cutting the sheet metal.

[0014] In the aforementioned miter saw, the cutting assembly includes a cutting head equipped with a cutting blade, a drive motor for rotating the cutting blade, and a handle for moving the cutting head. The cutting head and the guide mechanism are rotatably connected via a fourth rotating shaft, which is perpendicular to the first rotating shaft. The handle and the drive motor are both fixed to the cutting head. Because the fourth rotating shaft is perpendicular to the first rotating shaft, it extends laterally, allowing the cutting head to swing up and down relative to the guide mechanism around the fourth rotating shaft. Users can control the cutting head's upward and downward movement and forward and backward cutting by holding the handle, thus improving the user experience.

[0015] The features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a schematic diagram of the miter saw in a non-working state in one embodiment; Figure 2 This is a schematic diagram of a bevel saw when the guide mechanism extends in one embodiment; Figure 3 This is a schematic diagram of the bevel saw when the guide mechanism retracts towards the support arm in one embodiment; Figure 4 This is an exploded view of a bevel saw in one embodiment; Figure 5 This is a perspective view of the support arm in one embodiment.

[0017] Figure label: 100. Cutting assembly; 110. Cutting head; 111. Cutting blade; 120. Drive motor; 130. Handle; 200. Base; 210. Guide rail groove; 300, support arm; 310, clearance groove; 320, third pivot; 400. Guiding mechanism; 410. Guide arm; 411. First guide arm; 412. Second guide arm; 413. Third guide arm; 420. First rotating shaft; 430. Sliding member; 431. Sliding part; 432. Limiting part; 440. Hinge shaft; 450. Fourth rotating shaft; 500, Limiting rod; 510, First limiting segment; 520, Second limiting segment; 530, Second rotating shaft; 600, slide rail; 610, sliding hole; 611, first sliding section; 612, second sliding section; 613, transition section. Detailed Implementation

[0018] This invention discloses a miter saw, comprising: a cutting assembly for cutting sheet metal; a base having a guide rail groove for avoiding the cutting assembly; a support arm disposed on the base and extending upward therefrom; a guiding mechanism, wherein multiple guide arms are sequentially hinged together by a longitudinally extending hinge shaft to form a guiding mechanism, one end of the guiding mechanism is rotatably connected to the upper part of the support arm via a first rotating shaft parallel to the hinge shaft, and the other end is connected to the cutting assembly; the guiding mechanism extends or retracts towards the support arm to move the cutting assembly away from or closer to the support arm in the horizontal direction; and a limiting rod rotatably connected to one side of the support arm via a second rotating shaft, the limiting rod having a slide rail, and the guide arm connected to the cutting assembly having a sliding member, the sliding member limiting the cutting direction of the cutting assembly by slidingly connecting with the slide rail to move the cutting assembly along the guide rail groove. This invention provides a guide mechanism and a limiting rod on a miter saw. The guide mechanism is connected between the cutting assembly and the support arm. It can limit the cutting assembly installed at the end of the guide mechanism in the vertical direction by moving only in the horizontal direction. This allows the cutting assembly installed at the end of the guide mechanism to move on the horizontal plane defined by the guide mechanism. Because the guide arm connected to the cutting assembly is slidably connected to the guide rail on the limiting rod through a sliding member, the guide rail can limit the extension and retraction direction of the guide mechanism on the horizontal plane through the sliding member. This makes the cutting direction of the cutting assembly coincide with the extension direction of the guide rail groove, so as to cut the plate along the guide rail groove. The combination of the guide mechanism and the limiting rod can rigidly limit the cutting component in multiple directions, allowing the cutting component to move along the set direction and trajectory to cut the board. The cutting component will not shake or deviate when cutting the board, and the cutting accuracy is high. When the cutting component slides forward, one end of the guide rod is rotatably connected to the support arm. When the other end extends forward, it is set up side by side with the guide mechanism. That is, the guide rod is located on the side of the miter saw, not at the rear of the miter saw. Therefore, the guide rod will not occupy the space at the rear of the miter saw, thereby reducing the overall space occupied by the miter saw and making it easier to store and place the miter saw.

[0019] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more, unless explicitly defined otherwise.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] 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.

[0024] A type of bevel saw, such as Figures 1 to 5As shown, the device includes a cutting assembly 100, a base 200, a support arm 300, a guide mechanism 400, and a limiting rod 500. The cutting assembly 100 is used to cut sheet metal. The base 200 is provided with a guide groove 210. When the cutting assembly 100 cuts the sheet metal placed on the base 200, the guide groove 210 is used to avoid the cutting assembly 100. The support arm 300 is located on the base 200, with its lower end connected to the base 200 and extending upward from the base 200. The guide mechanism 400... The guide mechanism 400 is formed by sequentially hinged guide arms 410. Any two adjacent guide arms 410 are hinged together by a hinge shaft 440, which extends longitudinally and is parallel to each other. One guide arm 410 at one end of the guide mechanism 400 is rotatably connected to the upper part of the support arm 300 via a first rotating shaft 420, and the other guide arm 410 at the other end of the guide mechanism 400 is rotatably connected to the cutting assembly 100 via a fourth rotating shaft 450. The first rotating shaft 420 is parallel to the hinge shaft 440. When the cutting assembly 100 receives a lateral push or pull, the guide mechanism 400 can extend or retract towards the support arm 300 to guide the cutting assembly 100, causing the cutting assembly 100 to move away from or closer to the support arm 300 in the horizontal direction. The guide arms 410 can be two or more. In this embodiment, it is preferred that there are three guide arms 410, namely a first guide arm 411, a second guide arm 412, and a third guide arm 413. The first guide arm 411 is rotatably connected to the support arm 300, the third guide arm 413 is rotatably connected to the cutter assembly, and the second guide arm 412 is rotatably connected between the first guide arm 411 and the third guide arm 413. The arrangement of three guide arms 410 can ensure that the guide mechanism 400 has a sufficiently large extension distance, while also ensuring that the volume of each guide arm 410 is small, thus avoiding the guide structure from affecting the cutting of the sheet metal. One end of the limiting rod 500 is rotatably connected to one side of the support arm 300 via the second rotating shaft 530. A slide rail 600 is provided on the limiting rod 500. A sliding member 430 is provided on the guide arm 410 (i.e. the third guide arm 413) that is connected to the guide mechanism 400 and the cutting assembly 100. The sliding member 430 is slidably connected to the slide rail 600 to limit the cutting direction of the cutting assembly 100, so that the cutting direction of the cutting assembly 100 coincides with the extension direction of the guide groove 210, that is, the cutting assembly 100 moves along the guide groove 210.

[0025] This invention provides a guide mechanism 400 and a limiting rod 500 on a miter saw. The guide mechanism 400 is connected between the cutting assembly 100 and the support arm 300. Because the hinge shaft 440 of the guide mechanism 400 extends vertically and the first rotating shaft 420 is parallel to the hinge shaft 440, the guide mechanism 400 can limit the cutting assembly 100 installed at the end of the guide mechanism 400 in the vertical direction by moving only in the horizontal direction. This allows the cutting assembly 100 installed at the end of the guide mechanism 400 to move on the horizontal plane defined by the guide mechanism. Because the guide arm 410 connected to the cutting assembly 100 is slidably connected to the guide rail on the limiting rod 500 through the sliding member 430, the guide rail can limit the extension and retraction direction of the guide mechanism 400 on the horizontal plane through the sliding member 430. This allows the cutting direction of the cutting assembly 100 to coincide with the extension direction of the guide rail groove 210, so as to cut the plate along the guide rail groove 210. The combination of the guide mechanism 400 and the limiting rod 500 can rigidly limit the cutting component 100 in multiple directions, allowing the cutting component 100 to move along a set direction and trajectory to cut the board. The cutting component 100 will not shake or deviate when cutting the board, and the cutting accuracy is high. When the cutting component 100 slides forward, one end of the guide rod is rotatably connected to the support arm 300. When the other end extends forward, it is arranged side by side with the guide mechanism 400. That is, the guide rod is located on the side of the miter saw, not behind it. Therefore, the guide rod will not occupy the space behind the miter saw, thereby reducing the overall space occupied by the miter saw and making it easier to store and place.

[0026] In this embodiment, the slide rail 600 is a sliding hole 610, and the sliding member 430 passes through the sliding hole 610 to slide and connect with the sliding hole 610. By setting the slide rail 600 as a sliding hole 610, the production and processing of the limiting rod 500 only requires drilling a hole in the limiting rod 500 to complete the processing. The structure is simple and reliable, the assembly is stable, and the production and processing difficulty is greatly reduced. The sliding member 430 includes a sliding part 431 and a limiting part 432. The limiting part 432 is located at the end of the sliding part 431. The sliding part 431 passes through the sliding hole 610. The limiting part 432 is located outside the sliding hole 610 and abuts against the side of the limiting rod 500 away from the guide mechanism 400. By abutting against the limiting rod 500, the limiting part 432 prevents the sliding member 430 from disengaging from the limiting rod 500 along the axial direction of the sliding part 431, ensuring that the sliding member 430 can slide stably within the sliding hole 610, guiding the guide arm 410 on which the sliding member 430 is installed, and thus stably limiting the cutting assembly 100. Preferably, the sliding part 431 and the limiting part 432 are separately provided. The sliding part 431 is a screw, and the limiting part 432 is a nut that is threadedly connected to the screw, which facilitates the assembly of the sliding part 430 and the limiting rod 500. In order to enhance the stability of the assembly of the sliding part 431 and the limiting rod 500, two end face bearings can also be sleeved on the screw, and the two end face bearings are respectively located on both sides of the limiting rod 500.

[0027] To prevent the slider 430 from dislodging from both ends of the sliding hole 610 along its extension direction when the user pulls or pushes the cutting assembly 100, this embodiment closes both ends of the sliding hole 610 in the sliding direction. When the slider 430 abuts against the end of the sliding hole 610, the guide arm 410 with the slider 430 stops moving, thereby stopping the cutting assembly 100 mounted on the guide arm 410. This ensures that the sliding trajectory of the cutting assembly 100 is completely aligned with the guide groove 210, preventing the cutting assembly 100 from crossing the end of the guide groove 210. This ensures that the guide groove 210 can always avoid the cutting assembly 100 cutting the plate, preventing the cutter 111 from directly contacting the base 200 and causing damage to the cutter 111 when cutting the plate.

[0028] In this embodiment, the limiting rod 500 is bent to divide it into a first limiting segment 510 and a second limiting segment 520. The second limiting segment 520 is rotatably connected to the support arm 300. The included angle between the first limiting segment 510 and the second limiting segment 520 is less than 180 degrees. The sliding hole 610 includes a first sliding segment 611, a second sliding segment 612, and a transition segment 613. The first sliding segment 611 is disposed on the first limiting segment 510 and extends along the axial direction of the first limiting segment 510. The second sliding segment 612 is disposed on the second limiting segment 520 and extends along the axial direction of the second limiting segment 520. The transition segment 613 connects the first sliding segment 611 and the second sliding segment 612 to allow the first sliding segment 611 and the second sliding segment 612 to communicate. When the user pushes the cutting component 100 from a position away from the support arm 300 to a position closer to the support arm 300 to cut the plate, the guide mechanism 400 gradually retracts to one side of the guide arm 410. At this time, the slider 430 slides from the first sliding section 611 through the transition section 613 to the second sliding section 612. When the slider 430 slides in the first sliding section 611, the first limiting section 510 extends horizontally forward. During the process of the slider 430 sliding from the transition section 613 to the second sliding section 612, the slider 430 applies a pushing force to the limiting rod 500 through the inner wall of the sliding hole 610 to push the limiting rod 500 to swing upward around the second rotating shaft 530. When the material is cut, the limiting rod 500 has swung to a higher position where the first limiting segment 510 is located on one side of the support arm 300. That is, when the material is cut or when the material to be cut is placed on the base 200, the first limiting segment 510 extends upwards on one side of the support arm 300, rather than forwards. Therefore, the limiting rod 500 is far from the material in the vertical direction, making it less likely to affect the picking and placing of the material, and making the user's operation more convenient and simple. Of course, in another embodiment, the slide rail can also be a slide groove, specifically a T-shaped groove. The sliding member is a T-shaped member that slides with the T-shaped groove. The cross-sectional area of ​​the T-shaped groove is T-shaped, and its cooperation with the sliding member prevents the sliding member from freely disengaging from the slide groove.

[0029] In this embodiment, the support arm 300 has a clearance groove 310 on the side facing the guide mechanism 400. When the guide mechanism 400 retracts to the side of the support arm 300, all guide arms 410 overlap in the horizontal direction, and some guide arms 410 are embedded in the clearance groove 310. Because when the guide mechanism 400 retracts to the side of the support arm 300, it occupies a portion of the space above the board. By having all guide arms 410 overlap in the horizontal direction, the overall space occupied by the guide mechanism 400 above the board can be reduced. By providing the clearance groove 310 on the support arm 300, some guide arms 410 can be embedded in the clearance groove 310 to further reduce the space occupied by the guide mechanism 400 above the board, avoid the guide mechanism 400 from affecting the picking and placing of the board, and facilitate user operation.

[0030] Preferably, the depth of the clearance groove 310 in the horizontal direction is greater than the thickness of a single guide arm 410, i.e., as Figure 1 As shown, at least one guide arm 410 can be completely embedded in the clearance groove 310, minimizing the space occupied by the guide mechanism 400 above the plate while ensuring the strength of the support arm 300. Simultaneously, the clearance groove 310 can abut against the bottom of the guide arm 410 embedded within it, providing a certain degree of support to the guide arm 410, thereby supporting the guide mechanism 400 as a whole. This reduces the stress at the connection between the guide mechanism 400 and the support arm 300, preventing breakage due to excessive stress and extending the service life of the guide mechanism 400.

[0031] In this embodiment, the lower end of the support arm 300 is rotatably connected to one side of the base 200 via a third rotating shaft 320. The axial direction of the third rotating shaft 320 coincides with the extension direction of the guide rail groove 210. That is, the support arm 300 can rotate around the third rotating shaft 320 to drive the guide mechanism 400, the limiting rod 500 and the cutting component 100 to deflect on the base 200, so as to achieve oblique cutting of the plate. Because the axial direction of the third rotating shaft 320 coincides with the extension direction of the guide rail groove 210, the support arm 300 can rotate at any angle on the top of the base 200 to ensure that the cutting component 100 is always aligned with the guide rail groove 210, so that when cutting the plate, the guide rail groove 210 can always avoid the cutting component 100.

[0032] In this embodiment, the cutting assembly 100 includes a cutting head 110, a drive motor 120, and a handle 130. The cutting head 110 is equipped with a cutter 111. The drive motor 120 is fixed to the cutting head 110 to drive the cutter 111 to rotate. The handle 130 is fixed to the cutting head 110. The cutting head 110 and the guide mechanism 400 are rotatably connected via a fourth rotating shaft 450, which is perpendicular to the first rotating shaft 420. The cutting head 110 is rotatably connected to the guide mechanism 400 via the fourth rotating shaft 450. Because the fourth rotating shaft 450 is perpendicular to the first rotating shaft 420, it extends laterally. The cutting head 110 is rotatably connected to the end of the guide mechanism 400 via the laterally extending fourth rotating shaft 450, allowing the cutting head 110 to swing up and down relative to the guide mechanism 400. The user can control the cutting head 110's upward, downward, and forward / backward movement for cutting by holding the handle 130, improving the user experience.

[0033] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A miter saw, characterized in that, include, Cutting assembly for cutting sheet metal; The base has guide rail grooves for avoiding the cutting components; A support arm is mounted on the base and extends upward from the base; A guiding mechanism is formed by sequentially hinged multiple guide arms through a longitudinally extending hinge shaft. One end of the guiding mechanism is rotatably connected to the upper part of the support arm through a first rotating shaft parallel to the hinge shaft, and the other end is connected to the cutting assembly. The guiding mechanism extends or retracts towards the support arm to move the cutting assembly away from or closer to the support arm in the horizontal direction. A limiting rod is rotatably connected to one side of the support arm via a second rotating shaft. The limiting rod is provided with a slide rail. The guide arm of the guide mechanism, which is connected to the cutting assembly, is provided with a sliding member. The sliding member limits the cutting direction of the cutting assembly by slidingly connecting with the slide rail, so that the cutting assembly moves along the guide rail groove.

2. The miter saw according to claim 1, characterized in that: The slide rail is a sliding hole, and the sliding member passes through the sliding hole to be slidably connected with the sliding hole.

3. A miter saw according to claim 2, characterized in that: The sliding member includes a sliding part passing through the sliding hole and a limiting part provided at the end of the sliding part, wherein the limiting part abuts against the side of the limiting rod away from the guide mechanism.

4. A miter saw according to claim 2, characterized in that: The sliding hole is closed at both ends in the sliding direction.

5. A miter saw according to claim 2, characterized in that: The limiting rod includes a first limiting segment and a second limiting segment with an included angle of less than 180 degrees. The sliding hole includes a first sliding segment extending axially along the first limiting segment, a second sliding segment extending axially along the second limiting segment, and a transition segment connecting the first sliding segment and the second sliding segment. When the guide mechanism is retracted to one side of the support arm, the sliding member slides from the first sliding segment to the second sliding segment, and drives the limiting rod to swing upward around the second rotating axis.

6. A miter saw according to claim 1, characterized in that: The slide rail is a slide groove, the slide groove is a T-shaped groove, and the sliding member slides in conjunction with the T-shaped groove.

7. A miter saw according to claim 1, characterized in that: The support arm has a clearance groove on the side facing the guide mechanism. When the guide mechanism is retracted to the side of the support arm, all guide arms are stacked in the horizontal direction, and some guide arms are embedded in the clearance groove.

8. A miter saw according to claim 7, characterized in that: The depth of the clearance groove in the horizontal direction is greater than the thickness of a single guide arm.

9. A miter saw according to claim 1, characterized in that: The lower end of the support arm is rotatably connected to one side of the base via a third rotating shaft, the axial direction of which coincides with the extension direction of the guide rail groove.

10. A miter saw according to claim 1, characterized in that: The cutting assembly includes a cutting head with a cutter, a drive motor for driving the cutter to rotate, and a handle for moving the cutting head. The cutting head is rotatably connected to the guide mechanism via a fourth rotating shaft, which is perpendicular to the first rotating shaft. The handle and the drive motor are both fixed to the cutting head.

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