Multifunctional miter saw

Abstract

The utility model discloses a multifunctional miter saw which comprises a base, a leaning grid, a supporting assembly and a saw assembly and further comprises a cutting height adjusting assembly. The cutting height adjusting assembly comprises a positioning rod, a positioning plate and a positioning boss arranged at the upper end of the positioning plate. The positioning rod is arranged on the saw assembly, and the positioning plate is rotatably arranged on the supporting assembly, so that the positioning plate can rotate leftwards and rightwards relative to the supporting assembly. In the process that the saw assembly is pressed downwards to saw the workpiece, the positioning plate is rotated leftwards and rightwards to enable the positioning rod to abut against the upper end face of the positioning plate or the upper end face of the positioning boss, and at the moment, the saw assembly is located at the first cutting height or the second cutting height. According to the utility model, the adjustment of double cutting heights of the miter saw in a fixed cutting height mode can be realized to meet the requirements of different working conditions, meanwhile, the forward movement of a workpiece abutting surface on the miter saw can be realized, and the trouble caused by the forward movement of a cutting point is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of cutting tools, in particular to a multifunctional miter saw. Background Art

[0002] Miter saw is a common cutting tool for wood and other materials, and is widely used in industrial manufacturing, construction engineering, metal processing and other fields.

[0003] A miter saw has a cutting capacity, which defines the maximum size and dimensions of a workpiece it can cut through. Cutting capacity includes both cutting height and cutting length, with cutting height generally limited by the size of the motor drive mechanism and the diameter of the saw blade.

[0004] Currently, miter saws on the market generally have two cutting height modes: fixed and adjustable. In fixed cutting height mode, the saw assembly is restricted by the positioning rod abutting the upper end of the positioning plate during the downward movement of the saw assembly. This results in a single, fixed cutting height for the saw blade, making it unadjustable due to the positioning rod. In adjustable cutting height mode, the saw assembly is restricted by the positioning screw abutting the upper end of the positioning plate during the downward movement of the saw assembly, making the cutting height freely and flexibly adjustable due to the positioning screw. The fixed cutting height setting of a miter saw cannot meet many working requirements.

[0005] Cutting length is closely related to cutting height. Changes in cutting height will inevitably cause the miter saw's cutting point to move forward or backward. The miter saw's cutting point is the point where the rear end of the saw blade is flush with the upper end of the workpiece table. Changes in the cutting point can cause the miter saw's slide rail to fluctuate, and this travel directly affects the cut length. Longer slide rail travel also increases manufacturing costs. When the miter saw's cutting point moves backward, the originally designed slide rail travel can fully meet the needs of the current cutting process. However, when the miter saw's cutting point moves forward, the originally designed slide rail travel may need to be increased to meet the needs of the current cutting process, which increases manufacturing costs. Summary of the Invention

[0006] Purpose of the Utility Model: The purpose of this utility model is to provide a multifunctional miter saw that solves the problems caused by the single and fixed cutting height setting of the miter saw in the fixed cutting height mode, and the problem caused by the cutting point moving forward due to the change of cutting height. The utility model can realize the dual cutting height adjustment of the miter saw in the fixed cutting height mode to meet the needs of different working conditions; the utility model can realize the forward movement of the workpiece contact surface on the miter saw, effectively avoiding the trouble caused by the forward movement of the cutting point.

[0007] Technical solution: A multifunctional miter saw, comprising: a base, a guard, a support assembly, and a saw assembly, wherein the guards are respectively provided on the upper ends of the left and right sides of the base, the support assembly is provided on the base, the saw assembly is provided on the support assembly, and the miter saw further comprises a cutting height adjustment assembly;

[0008] The cutting height adjustment assembly includes a positioning rod, a positioning plate and a positioning boss provided on the upper end of the positioning plate;

[0009] The positioning rod is provided on the saw assembly, and the positioning plate is rotatably provided on the support assembly so that the positioning plate can rotate left and right relative to the support assembly;

[0010] When the saw assembly is pressed down to saw a workpiece, the positioning plate is rotated left and right so that the positioning rod abuts against the upper surface of the positioning plate. At this time, the saw assembly is at a first cutting height.

[0011] When the saw assembly is pressed down to saw a workpiece, the positioning plate is rotated left and right so that the positioning rod abuts against the upper end surface of the positioning boss. At this time, the saw assembly is located at a second cutting height.

[0012] Further: the base includes a main support seat, secondary support seats fixedly provided on both sides of the main support seat in the left and right directions, and a workbench rotatably supported on the upper end of the main support seat;

[0013] Wherein, the upper end surface of the secondary support seat is arranged flush with the upper end surface of the workbench.

[0014] Further: the miter saw also includes a spacer fence provided at the front end of the backrest, the backrest and the spacer fence are arranged along the left and right directions and parallel to the upper end surface of the base, the backrest includes an upper backrest and a lower backrest, the upper end of the secondary support seat is fixed with the lower backrest, the upper end of the lower backrest is detachably provided with the upper backrest, the front end of the upper backrest and located above the base are respectively provided with the spacer fence, the backrest and the spacer fence extend toward the middle of the workbench, and the extension parts of the backrest and the spacer fence are located above the workbench.

[0015] Further: a slot is opened along the left and right directions at the upper end of the lower support rail, the vertical cross-section of the upper support rail is an inverted L-shape, the vertical edge of the upper support rail can be inserted into the slot, and a fastening screw for fixing the vertical edge of the upper support rail is provided on the rear end wall of the slot, and the horizontal edge of the upper support rail is integrally formed with the spacer rail at its front end.

[0016] Further: the support assembly includes a support arm, a slide rail and a sliding seat. The bottom end of the support arm can be rotatably arranged at the rear end of the workbench so that the support arm can rotate left and right relative to the workbench. The slide rail is arranged along the front and rear directions and parallel to the upper end surface of the workbench. The rear end of the slide rail is fixedly connected to the top end of the support arm. The sliding seat is provided on the slide rail, and the sliding seat can slide on the slide rail along the front and rear directions.

[0017] Further: the saw assembly includes a casing, a saw blade and a driving source. The casing is arranged along the front-to-back direction. A saw blade for sawing is provided inside the casing. A driving source for driving the saw blade to saw is provided outside the casing. The rear end of the casing can be rotatably provided on the sliding seat so that the saw assembly can rotate up and down relative to the sliding seat.

[0018] Further: a positioning seat is provided on the outside of one side of the left and right directions of the housing, the sliding seat is positioned toward the positioning seat and extends horizontally in the front-to-back direction, the extension portion of the sliding seat is located directly below the positioning seat, the positioning plate is provided on the extension portion of the sliding seat, the rear end of the positioning plate is rotatably provided on the extension portion of the sliding seat, so that the positioning plate can rotate left and right relative to the extension portion of the sliding seat, and the positioning rod is fixedly provided through the positioning seat;

[0019] When the saw blade is pressed down to saw the workpiece, the positioning plate is rotated left and right so that the positioning rod abuts against the upper surface of the positioning plate, and the saw blade is at a first cutting height;

[0020] When the saw blade is pressed down to saw the workpiece, the positioning plate is rotated left and right so that the positioning rod abuts against the upper end surface of the positioning boss. At this time, the saw blade is located at the second cutting height.

[0021] Further: the first cutting height is lower than the second cutting height.

[0022] Furthermore: the spacer grid is made of aluminum profile.

[0023] Beneficial effects of the utility model:

[0024] 1. The utility model is based on the setting of the cutting height adjustment component, which can realize the adjustment of the double cutting height of the miter saw in the fixed cutting height mode to meet the needs of different working conditions.

[0025] 2. The utility model can realize the forward movement of the workpiece to be sawed on the miter saw based on the set spacer grid, effectively avoiding the trouble caused by the cutting point moving forward due to the change of cutting height. While meeting the cutting process requirements, it also prevents the manufacturing cost from being excessively increased.

[0026] 3. Traditional miter saws operate in fixed cutting height mode, where the positioning rod abuts against the positioning plate, preventing adjustment, resulting in a single, fixed cutting height. In fixed cutting height mode, the miter saw of the present invention can achieve dual-adjustment cutting heights by abutting the positioning rod against the upper surface of the positioning plate or the upper surface of the positioning boss, thus meeting the needs of a wider range of working conditions.

[0027] When adjusting the cutting height in fixed-cutting-height mode, the cutting point of the miter saw in this invention shifts forward. Traditionally, this problem has been addressed by increasing the travel of the slide rails, a solution that significantly increases manufacturing costs. The present invention utilizes a spacer to move the workpiece forward, effectively resolving the problem without increasing the travel of the slide rails and minimizing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a three-dimensional diagram of a multifunctional miter saw of the present utility model;

[0029] Figure 2 This is a front view of a multifunctional miter saw according to the present invention;

[0030] Figure 3 This is a side view of a multifunctional miter saw according to the present invention;

[0031] Figure 4 This is a top view of a multifunctional miter saw according to the present invention;

[0032] Figure 5 This is an enlarged structural diagram of the positioning rod abutting against the upper end surface of the positioning plate;

[0033] Figure 6 It is an enlarged structural diagram of the positioning rod abutting against the upper end surface of the positioning boss.

[0034] In the figure: 1. Main support seat; 2. Secondary support seat; 3. Workbench; 4. Spacer; 5. Upper support rail; 6. Lower support rail; 7. Fastening screw; 8. Support arm; 9. Slide rail; 10. Sliding seat; 11. Casing; 12. Saw blade; 13. Drive source; 14. Positioning rod; 15. Positioning plate; 16. Positioning boss; 17. Positioning screw. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Those skilled in the art will appreciate that, unless there is any conflict, the features in the following embodiments and implementations may be combined with each other.

[0037] The terms used in this utility model are for the purpose of describing specific embodiments only and are not intended to limit the utility model. For example, the terms "upper," "lower," "front," "back," "left," "right," and the like, which indicate directions or positional relationships, are based solely on the directions or positional relationships shown in the accompanying drawings and are provided solely for the purpose of facilitating and simplifying the description of the utility model. They do not indicate or imply that the devices or components referred to must have a specific direction or be constructed or operated in a specific direction. Therefore, they should not be construed as limiting the utility model.

[0038] As used in this specification, the singular forms "a," "an," and "the" include plural referents, and the plural form "a plurality" includes more than two referents, unless the context clearly indicates otherwise. As used in this specification, the term "or" is generally used to include "and / or," unless the context clearly indicates otherwise. The terms "mounted," "connected," and "connected" should be broadly construed, meaning, for example, fixedly connected, removably connected, or integrally connected. Connections can be direct or indirect through an intermediary, and can encompass internal communication between two components or an interaction between two components.

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0040] like Figure 1-6 As shown, a multifunctional miter saw comprises a base, a fence, a support assembly and a saw assembly.

[0041] The base comprises a main support 1, secondary supports 2 fixed to either side of the main support 1, and a worktable 3 rotatably supported on the upper end of the main support 1. The secondary supports 2 are fixed relative to the main support 1, while the worktable 3 is rotatably supported, allowing it to rotate horizontally. The upper end surfaces of the secondary supports 2 are flush with the upper end surfaces of the worktable 3, and together they form the upper end surface of the base, which is used to place the workpiece to be sawn.

[0042] The miter saw of this application also includes a spacer 4, which is used to abut the workpiece to be cut. A support grid is provided on each upper end of the left and right sides of the base, and a spacer 4 is provided at the front end of each support grid. The front end of each spacer 4 serves as an abutment surface for abutting the workpiece. By providing the spacer 4, the workpiece to be cut can be moved forward. This not only effectively solves the problem of moving the cutting point forward without increasing the travel of the slide rail, but also reduces the manufacturing cost.

[0043] The backing grid and the spacer grid 4 are arranged in the left-right direction and parallel to the upper end surface of the base. The backing grids include an upper backing grid 5 and a lower backing grid 6. The upper ends of the secondary support seats 2 are respectively fixed with lower backing grids 6. The upper ends of the lower backing grids 6 are detachably provided with upper backing grids 5. The detachable connection between the lower backing grids 6 and the upper backing grids 5 can be designed as follows:

[0044] The upper guardrail 5 is designed so that its vertical cross-section is an inverted L-shape, and a slot is provided at the upper end of the lower guardrail 6 along the left-right direction. The vertical edge of the upper guardrail 5 can be freely inserted into the slot. A fastening screw hole is provided on the rear end wall of the slot, and a fastening screw 7 is screwed into the fastening screw hole. By turning the fastening screw 7, the vertical edge of the upper guardrail 5 inserted into the slot can be fastened in position, thereby realizing a detachable connection between the upper guardrail 5 and the lower guardrail 6. The left and right ends of the slot are preferably open to facilitate the insertion of the vertical edge of the upper guardrail 5 into the slot.

[0045] A spacer grid 4 is provided at the front end of the upper support grid 5 and above the base, with a gap between the spacer grid 4 and the upper end surface of the base. The upper support grid 5 is configured in an inverted L-shape, having a vertical side and a horizontal side, with the horizontal side of the upper support grid 5 facing forward. The horizontal side of the upper support grid 5 and the spacer grid 4 at its front end can be integrally formed, or detachably connected by screws or other means, or fixedly connected by welding or other means. The spacer grid 4 of the present application can be manufactured using aluminum profiles, which are low-cost, so that the manufacturing cost of the miter saw of the present application will not be excessively increased.

[0046] The backrest and the spacer 4 both extend toward the center of the workbench 3, that is, the upper backrest 5, the lower backrest 6, and the spacer 4 all extend toward the center of the workbench 3. Due to the sawing requirements of the miter saw, although the backrest and the spacer 4 both extend toward the center of the workbench 3, there is still a certain distance between the ends of the extensions and the center of the workbench 3. This is to prevent the extended ends of the backrest and the spacer 4 from affecting the sawing process. The extended portions of the backrest and the spacer 4 are both located above the workbench 3, with a gap between them and the upper end surface of the workbench 3. This design ensures that the horizontal rotation of the workbench 3 will not be affected by the backrest and the spacer 4. An arc-shaped connecting grid can be provided between the extended ends of the lower backrest 6 by means of integral molding, screws, welding, etc. The arc-shaped connecting grid is located behind the lower backrest 6 and also above the workbench 3. This prevents the arc-shaped connecting grid from affecting the horizontal rotation of the workbench 3 and the sawing process of the miter saw.

[0047] The support assembly is mounted on the workbench 3 and supports the saw assembly, which is used to saw workpieces. The support assembly includes a support arm 8, a slide rail 9, and a sliding base 10. The bottom end of the support arm 8 is rotatably mounted on the rear end of the workbench 3, allowing the support arm 8 to rotate left and right relative to the workbench 3, thereby allowing the saw assembly to rotate left and right relative to the workbench 3. This rotation allows the saw assembly to adjust the bevel angle, i.e., the cutting angle. The slide rail 9 is arranged in a front-to-back direction and parallel to the upper end surface of the workbench 3. The rear end of the slide rail 9 is fixedly connected to the top end of the support arm 8. The slide base 10 is mounted on the slide rail 9 and slides on the slide rail 9 in a front-to-back direction. The slide rail 9 includes an upper slide rail and a lower slide rail arranged in parallel with each other. The slide base 10 is mounted on the upper and lower slide rails and slides on the upper and lower slide rails. The saw assembly includes a housing 11, a saw blade 12, and a drive source 13. The housing 11 is arranged in a front-to-back direction and contains the saw blade 12, which is used to saw workpieces. A drive source 13, typically comprising a motor, is mounted outside the housing 11 to drive the saw blade 12 for sawing. The rear end of the housing 11 is rotatably mounted on the sliding base 10, allowing the saw assembly to rotate up and down relative to the sliding base 10. This rotation allows the saw assembly to saw the workpiece and adjust the cutting height.

[0048] In the existing technologies related to miter saws, whether the support assembly is used to achieve sawing support and left and right rotation, or the saw assembly is used to achieve workpiece sawing and up and down rotation, these are relatively mature technologies for those skilled in the art. Those skilled in the art can fully refer to the existing technologies to design the support assembly and saw assembly in more detail, so we will not make too many introductions to the support assembly and saw assembly here.

[0049] At present, miter saws on the market generally include two cutting height modes, namely fixed cutting height mode and adjustable cutting height mode. In the fixed cutting height mode, the saw assembly of the miter saw will be restricted during the downward pressing process because the positioning rod abuts against the upper end face of the positioning plate, which will make the cutting height of the saw blade single and fixed, and it cannot be adjusted due to the positioning rod; in the adjustable cutting height mode, the saw assembly of the miter saw will be restricted during the downward pressing process because the positioning screw abuts against the upper end face of the positioning plate, and it can be adjusted freely and flexibly due to the positioning screw. In the fixed cutting height mode, the miter saw will not be able to meet many working conditions due to the single and fixed cutting height setting. The miter saw of the present application also includes a cutting height adjustment component, and the provided cutting height adjustment component can realize the adjustment of the double cutting height in the fixed cutting height mode to meet the needs of different working conditions.

[0050] The cutting height adjustment assembly of the present application includes a positioning rod 14, a positioning plate 15 and a positioning boss 16, and the positioning boss 16 is provided at the upper end of the positioning plate 15. A positioning seat is provided on the outside of one side of the left and right directions of the housing 11, and the sliding seat 10 extends horizontally in the front-to-back direction toward the positioning seat. The extended portion of the sliding seat 10 is located directly below the positioning seat, and a positioning plate 15 is provided on the extended portion of the sliding seat 10. The rear end of the positioning plate 15 is rotatably provided on the extended portion of the sliding seat 10 so that the positioning plate 15 can rotate left and right relative to the extended portion of the sliding seat 10, and the positioning rod 14 is fixedly provided through the positioning seat. When sawing, the operator will press down the saw assembly by hand to saw the workpiece. The existing miter saws on the market are restricted during the downward pressing of the saw assembly because the positioning rod abuts against the upper end face of the positioning plate, which makes the cutting height of the saw blade single and fixed. During the downward pressing process of the saw assembly of the present application, the operator can manually rotate the positioning plate 15 so that the positioning rod 14 abuts against the upper end surface of the positioning plate 15 or the upper end surface of the positioning boss 16 and is restricted, which makes the cutting height of the saw blade 12 of the present application not a single and fixed setting.

[0051] When the positioning rod 14 of the present invention abuts the upper end surface of the positioning plate 15, the saw blade 12 is at a first cutting height. When the positioning rod 14 of the present invention abuts the upper end surface of the positioning boss 16, the saw blade 12 is at a second cutting height. Because the positioning boss 16 is located at the upper end of the positioning plate 15, there is a significant height difference between the upper end surfaces thereof. Therefore, the first cutting height of the saw blade is lower than its second cutting height, thereby achieving dual cutting height adjustment in the fixed cutting height mode of the miter saw.

[0052] During the downward movement of the saw assembly of the present application, the positioning rod 14 can selectively abut against either the upper end surface of the positioning plate 15 or the upper end surface of the positioning boss 16 because the positioning boss 16 and the positioning rod 14 are designed so that the shortest distance between the positioning boss 16 and the rotation point of the positioning plate 15 is equal to the shortest distance between the abutment end of the positioning rod 14 on the upper end surface of the positioning plate 15 and the rotation point of the positioning plate 15. Furthermore, because the rear end of the positioning plate 15 is rotatably mounted on an extension of the sliding seat 10, the rotatable arrangement of the positioning plate 15 allows it to rotate left and right relative to the extension of the sliding seat 10. Therefore, the operator can manually rotate the positioning plate 15 to change the position of the positioning boss 16, thereby enabling the positioning rod 14 to abut against either the upper end surface of the positioning plate 15 or the upper end surface of the positioning boss 16 during the downward movement of the saw assembly.

[0053] The miter saw of the present application has a fixed cutting mode with double cutting height adjustment as well as an adjustable cutting height mode. A screw seat is fixed at the front end of the positioning seat, and the screw seat is also fixed to the outside of the housing 11. A positioning screw 17 is movably penetrated through the screw seat. By turning the positioning screw 17, the positioning screw 17 can move up and down. The positioning screw 17 is arranged in parallel with the positioning rod 14 at intervals. A first through hole is provided on the extension portion of the sliding seat 10 and corresponds to the position of the positioning screw 17, and a second through hole is provided on the positioning plate 15. In the fixed cutting mode, when the saw blade 12 is at the first cutting height, the second through hole is located directly above the first through hole. This design allows the positioning screw 17 to move through the second through hole and the first through hole in sequence when the positioning rod 14 abuts against the upper end face of the positioning plate 15 in the fixed cutting mode, so that the positioning screw 17 will not interfere with the positioning rod 14 abutting against the upper end face of the positioning plate 15. Figure 5 When adjusting the cutting height in the adjustable cutting height mode, the operator can manually rotate the positioning plate 15 so that the positioning screw 17 is offset from the second through hole, so that the positioning screw 17 abuts against the upper end surface of the positioning plate 15 during the downward pressing process of the saw blade 12. By then turning the positioning screw 17, the cutting height of the saw blade 12 can be adjusted.

[0054] In the present application, the saw blade 12 located at the second cutting height, compared to the first cutting height, not only increases the sawing height, but also moves the cutting point forward. The miter saw cutting point in the present application refers to the point where the rear end of the saw blade is flush with the end surface of the workbench. The forward movement of the miter saw cutting point may require an increase in the stroke of the originally designed slide rail 9 to meet the needs of the current cutting process, which will increase the manufacturing cost. The traditional solution is to solve the problem by increasing the slide rail stroke, which will cause a substantial increase in manufacturing costs. The present application moves the workpiece forward by using the spacer 4, which not only effectively solves the trouble caused by the forward movement of the cutting point without increasing the slide rail stroke, but also prevents the manufacturing cost from being excessively increased.

[0055] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art will understand that the present invention includes, but is not limited to, the contents described in the above specific embodiment. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. A multifunctional miter saw comprising: A base, a fence, a support assembly and a saw assembly, wherein the fences are respectively provided on the upper ends of both sides of the base in the left and right directions, the support assembly is provided on the base, and the saw assembly is provided on the support assembly, wherein the miter saw further includes a cutting height adjustment assembly; The cutting height adjustment assembly includes a positioning rod, a positioning plate and a positioning boss provided on the upper end of the positioning plate; The positioning rod is provided on the saw assembly, and the positioning plate is rotatably provided on the support assembly so that the positioning plate can rotate left and right relative to the support assembly; When the saw assembly is pressed down to saw a workpiece, the positioning plate is rotated left and right so that the positioning rod abuts against the upper surface of the positioning plate. At this time, the saw assembly is at a first cutting height. When the saw assembly is pressed down to saw a workpiece, the positioning plate is rotated left and right so that the positioning rod abuts against the upper end surface of the positioning boss. At this time, the saw assembly is located at a second cutting height.

2. The multifunctional miter saw according to claim 1, characterized in that: The base includes a main support seat, secondary support seats fixedly provided on both sides of the main support seat in the left and right directions, and a workbench rotatably supported on the upper end of the main support seat; Wherein, the upper end surface of the secondary support seat is arranged flush with the upper end surface of the workbench.

3. The multifunctional miter saw according to claim 2, characterized in that: The miter saw also includes a spacer grille provided at the front end of the backrest, the backrest and the spacer grille are arranged along the left and right directions and parallel to the upper end surface of the base, the backrest includes an upper backrest and a lower backrest, the upper end of the secondary support seat is fixed with the lower backrest, the upper end of the lower backrest is detachably provided with the upper backrest, the spacer grille is provided at the front end of the upper backrest and located above the base, the backrest and the spacer grille extend toward the middle of the workbench, and the extensions of the backrest and the spacer grille are located above the workbench.

4. The multifunctional miter saw according to claim 3, characterized in that: A slot is provided at the upper end of the lower support rail along the left and right directions, and the vertical cross-section of the upper support rail is an inverted L-shape. The vertical edge of the upper support rail can be inserted into the slot, and a fastening screw for fixing the vertical edge of the upper support rail is provided on the rear end wall of the slot. The horizontal edge of the upper support rail is integrally formed with the spacer rail at its front end.

5. The multifunctional miter saw according to claim 2, characterized in that: The support assembly includes a support arm, a slide rail and a sliding seat. The bottom end of the support arm is rotatably arranged at the rear end of the workbench so that the support arm can rotate left and right relative to the workbench. The slide rail is arranged along the front and rear directions and parallel to the upper end surface of the workbench. The rear end of the slide rail is fixedly connected to the top end of the support arm. The sliding seat is provided on the slide rail, and the sliding seat can slide on the slide rail along the front and rear directions.

6. The multifunctional miter saw according to claim 5, characterized in that: The saw assembly includes a housing, a saw blade and a drive source. The housing is arranged along the front-to-back direction. A saw blade for sawing is provided inside the housing. A drive source for driving the saw blade to saw is provided outside the housing. The rear end of the housing can be rotatably provided on the sliding seat so that the saw assembly can rotate up and down relative to the sliding seat.

7. The multifunctional miter saw according to claim 6, characterized in that: A positioning seat is provided on the outside of one side of the housing in the left and right directions, the sliding seat is positioned toward the positioning seat and extends horizontally in the front-to-back direction, the extension portion of the sliding seat is located directly below the positioning seat, the positioning plate is provided on the extension portion of the sliding seat, the rear end of the positioning plate is rotatably provided on the extension portion of the sliding seat, so that the positioning plate can rotate left and right relative to the extension portion of the sliding seat, and the positioning rod is fixedly passed through the positioning seat; When the saw blade is pressed down to saw the workpiece, the positioning plate is rotated left and right so that the positioning rod abuts against the upper surface of the positioning plate, and the saw blade is at a first cutting height; When the saw blade is pressed down to saw the workpiece, the positioning plate is rotated left and right so that the positioning rod abuts against the upper end surface of the positioning boss. At this time, the saw blade is located at the second cutting height.

8. The multifunctional miter saw according to claim 1, characterized in that: The first cutting height is lower than the second cutting height.

9. The multifunctional miter saw according to claim 3, characterized in that: The spacer grid is made of aluminum profile.

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