Multifunctional miter saw

Abstract

The multifunctional miter saw comprises a miter saw body composed of a base, a workbench and a machine head assembly, the workbench is movably installed above the base, a support is installed at the rear end of the workbench, the machine head assembly is installed on the support in a hinged mode, folding wing unfolding assemblies are symmetrically installed on the two sides of the base, and each wing unfolding assembly comprises a wing unfolding table top and an L-shaped wing unfolding support. The upper ends of the wing-unfolding supports are hinged to the wing-unfolding table top, the lower ends of the wing-unfolding supports are hinged to the base, and the included angle of the inner sides of the wing-unfolding supports is larger than 90 degrees. The wing unfolding table boards can be driven by the wing unfolding supports to ascend and descend in a folding mode, and when the wing unfolding table boards ascend, the two wing unfolding table boards can be oppositely buckled on the two sides of the machine head assembly to serve as upper workbenches. When the wing-unfolding table board is folded and descends, the wing-unfolding table board can be used as an extension surface of the workbench; a folding wing unfolding locking assembly is arranged between the wing unfolding table top and the machine head assembly. The bench saw is reasonable in structural design, the bench saw mode and the miter saw mode can be conveniently switched, and the cutting effect is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting electric tools, relates to the structure and performance improvement of a miter saw, and in particular to a multifunctional miter saw. Background Art

[0002] A miter saw, also called a circular saw, aluminum saw or miter saw, is an electric tool that can cut and process materials such as wood, plastic or metal to obtain components or workpieces that meet the requirements. When using a miter saw, the material needs to be fixed on the workbench of the base, the head assembly is pushed to drive the saw blade to move toward the material, and then the saw blade is rotated to work, generally using the lower part of the saw blade to cut the material. A common table saw consists of a saw blade, a power system that drives the saw blade, a work surface, and a saw frame that supports the workbench. When using a table saw, the material needs to be placed on the table and pushed toward the saw blade to work, generally using the upper part of the saw blade to cut the material.

[0003] For users, since the two types of cutting saws can achieve different cutting effects, table saws and miter saws are often used together. However, most existing compound saws are relatively complex and have unreasonable structural settings; it takes time and effort to switch between the two modes of table saws and miter saws, which is inconvenient to use.

[0004] For example, a Chinese patent (authorization announcement number CN209466334U, authorization announcement date October 8, 2019) discloses a “folding compound saw”, comprising a base (1), a first working platform (2), a second working platform and a cutting unit, wherein the second working platform comprises a left platform (3) and a right platform (4), wherein the left platform (3) and the right platform (4) are foldable and liftable relative to the base (1), and when the second working platform is raised, the second working platform is located above the first working platform (2), and the cutting unit is longitudinally extending between the left platform (3) and the right platform (4); when the second working platform is folded and lowered, the left platform (3) and the right platform (4) become extension surfaces on both sides of the first working platform (2).

[0005] The above-disclosed folding compound saw is still a simple one in which a foldable workbench is fixed on the cutting unit (head assembly). Although it improves the efficiency of the conversion between the miter saw and the table saw, there are still many structural deficiencies, and the strength of the foldable workbench supported only by the cutting unit (head assembly) is poor. The left platform (3), the right platform (4) and the cutting unit cannot effectively achieve flatness adjustment and locking; the brackets of the left platform (3) and the right platform (4) are not stable, which affects the cutting accuracy. Especially when used as a miter saw, the two sides and the front end of the cutting unit lack support and locking; when the saw blade is cutting, the lower part is in an open state without protective measures, which will generate a large amount of dust flying into the air, polluting the environment and endangering human health. Summary of the invention The object of the present invention is to provide a multifunctional miter saw, which is used to solve the problem that the existing compound saw has a complex structure and is inconvenient to use in both table saw and miter saw modes.

[0007] In order to achieve the purpose of the present invention, the following technical solutions are adopted: A multifunctional miter saw comprises a miter saw body consisting of a base, a workbench and a head assembly, wherein the workbench is movably installed above the base, a bracket is installed at the rear end of the workbench, the head assembly is hingedly installed on the bracket, folding wing assemblies are symmetrically installed on both sides of the base, the wing assemblies comprise a wing table and an L-shaped wing bracket, the upper end of the wing bracket is hinged to the wing table, the lower end of the wing bracket is hinged to the base, and the inner side angle of the wing bracket is greater than 90°; the wing table can be folded and lifted under the drive of the wing bracket, and when the wing table is lifted, two sets of the wing tables can be relatively buckled on both sides of the head assembly as an upper workbench; when the wing table is folded and lowered, the wing table can be used as an extension of the workbench. The folding wing locking assembly is provided between the wing table and the nose assembly, and the folding wing locking assembly includes a locking piece and a locking hook plate, the locking piece is installed at the bottom of the wing table, and the locking hook plate is installed at the side of the nose assembly; the locking piece includes a locking shaft, a locking handle, and a locking hook, the middle part of the locking shaft is sleeved in the mounting seat provided on the wing table, and the locking handle and the locking hook are fixedly installed on both sides of the mounting seat; a locking cavity is provided on the locking hook plate; when the locking handle is rotated downward, the locking hook is driven to hook the locking hook plate, so that the folding wing assembly is locked with the nose assembly; when the locking handle is rotated upward, the locking hook is driven to disengage from the locking hook plate, so that the folding wing assembly is separated from the nose assembly.

[0008] In order to further achieve the purpose of the present invention, the following technical solutions can also be adopted: As described above, the multifunctional miter saw has a detachable lower saw blade guard installed on the base. The lower saw blade guard is a semicircular shell with an opening, which is snapped onto the lower part of the head assembly. A plane matching the workbench is provided at the bottom of the lower saw blade guard, and the inner side of the lower saw blade guard is arc-shaped.

[0009] As described above, the multifunctional miter saw, the wing-spreading bracket includes a first support member and a second support member, the first support member is fixedly connected to one end of the second support member, the other end of the second support member is hinged to the mounting ear at the bottom of the wing-spreading table, and the other end of the first support member is hinged to the base; when the wing-spreading table is raised, the upper edge of the second support member forms a horizontal support for the wing-spreading table; when the wing-spreading table is folded and landed, the top of the second support member and the middle inner side of the first support member cooperate to form a horizontal support for the wing-spreading table.

[0010] As described above, the multifunctional miter saw has an adjustment rod disposed in the middle of the inner side of the first support member, and the adjustment rod is used for supporting and adjusting the horizontality of the wing-spreading table when it is folded and landed; one end of the adjustment rod is disposed in a screw hole on the first support member, and the other end of the adjustment rod contacts the bottom of the wing-spreading table.

[0011] As described above, the multifunctional miter saw has a plurality of reinforcing ribs disposed inside the first support member and the second support member; a buffer pad is coated around the connecting portion between the first support member and the second support member; and the thickness of the first support member and the second support member decreases from the connecting portion outward.

[0012] As described above, the multifunctional miter saw has an elastic element installed at the position between the locking hook and the mounting seat of the locking shaft, and the elastic element is a disc spring or a corrugated pad, and the elastic element is used for the suspended positioning of the locking hook; the locking hook plate is a strip plate, and both ends of the strip plate are fixed to the mounting columns on the side of the head assembly by screws, and the gap between the strip plate and the head assembly serves as a locking cavity.

[0013] In the multifunctional miter saw as described above, the locking shaft passes through the outer end of the locking handle to install a nut, and the nut is used to adjust the locking force between the locking hook and the locking hook plate.

[0014] As described above, the multifunctional miter saw has wing table positioning components installed on both sides of the folding wing locking component, and the wing table positioning components include positioning pins and positioning pin holes. The positioning pins are installed at the bottom of the wing table, and the positioning pin holes are arranged on the side of the head component.

[0015] As described above, the multifunctional miter saw has a front-end locking support assembly arranged between the front end of the workbench and the machine head assembly, the front-end locking support assembly comprising a workbench hook and a front-end locking member, the lower end of the workbench hook is hinged to the front end of the workbench through a rotating shaft, the front-end locking member is arranged at the front end of the machine head assembly, and the workbench hook can be rotated, folded and lifted around the rotating shaft; the front-end locking member comprises a locking hook groove and a locking structure, the locking hook groove is arranged on the machine head assembly, and the locking hook groove cooperates with the hook portion at the upper end of the workbench hook; the locking structure comprises a locking button, a bolt, a spring and a locking nut, the bolt is arranged in the mounting hole of the machine head assembly, the locking nut is installed at the inner end of the bolt, the locking button is installed at the outer end of the bolt, and a spring is sleeved on the outer periphery of the bolt between the locking nut and the mounting hole; when the workbench hook is raised, the rotating locking button can block the hook portion of the workbench hook in the hook groove.

[0016] As described above, the multifunctional miter saw has two locking ribs spaced apart on the locking button, and a protrusion is provided on the head assembly, which cooperates with the locking rib to limit the locking button from rotating between the two locking ribs; the upper portion of the workbench hook is a U-shaped structure, and the hook is installed at the upper ends of both side edges of the U-shaped structure; when the locking button blocks the hook of the workbench hook in the hook groove, the bolt is located between the two side edges of the U-shaped structure, and the locking button is located at the front side of the workbench hook; the locking hook groove is a trapezoidal opening, and the hook of the workbench hook is a trapezoidal block that cooperates with the trapezoidal opening.

[0017] The advantages of the present invention are: 1. When the present invention is used in the table saw mode, the head assembly can rotate around the rotating shaft hinged at the rear end of the workbench, and the workbench hook can rotate around the rotating shaft hinged at its lower end to the base, so that the hook can hook the locking hook groove of the head assembly, and then use the locking button to lock it; the folding wing assembly can rotate around the rotating shaft hinged at the lower end to the base, and the wing table can rotate around the rotating shaft hinged at the wing bracket, and the positioning pin on the wing table is inserted into the positioning pin hole, and the locking handle is rotated to make the locking hook hook the locking hook plate, so that the wing table and the head are connected as a whole, which is the table saw state. At this time, due to the support of the wing table on both sides, the strength is better, and the wing tables on both sides are used at the same time, and the supporting area is larger.

[0018] 2. When the present invention is used in the miter saw mode, the locking handle is rotated in the opposite direction to disengage the locking hook from the locking hook plate; then, the wing-spreading table or the wing-spreading bracket is held and pulled outward to disengage the positioning pin from the positioning pin hole; the wing-spreading table is folded and placed on both sides of the base, and the wing-spreading table is flush with the work surface, and can be used as an extended table when cutting long materials.

[0019] The locking button is opened, the table hook and the machine head assembly are separated, and the table hook can be rotated to the groove on the table, below the table plane. Remove the lower guard without affecting the material cutting in the miter saw state. At this time, the miter saw state is exactly the same as a regular miter saw, and the upper workbench of the machine head assembly will not block the line of sight, nor will the upper workbench increase the weight of the machine head assembly, causing inconvenience in use.

[0020] 3. In the folding wing locking assembly, the locking hook and the locking shaft are connected as one, and the other end of the locking shaft passes through the hole of the mounting seat and the locking handle in turn and is fixed with a nut. These three parts are fixed and can be rotated around the hole of the wing table as a whole. When rotating downward, the locking hook can be hooked on the locking hook plate, and the entire folding wing assembly will not fall out; when rotating upward, the locking hook leaves the locking hook plate, and the folding wing assembly can be opened from the bottom. In addition, there is an inclined surface on the locking hook, which is convenient for matching with the locking cavity on the locking hook plate, and the more the locking hook rotates downward, the tighter it locks. An elastic element, such as a disc spring, a corrugated washer, etc., is added between the locking hook and the mounting seat boss, and the nut pulls the locking shaft, so that the locking hook can be hovered and positioned at any position during the rotation process, and will not fall freely under the action of gravity; at the same time, the locking force between the locking hook and the locking hook plate can be adjusted by the nut.

[0021] 4. In the locking support assembly at the front end of the miter saw, the locking button is opened, the workbench hook is transferred to the hook slot at the front end of the machine head assembly, and then the locking button is rotated in the opposite direction to block the hook in the hook slot to ensure that the workbench hook will not fall out. There are two positioning ribs on the locking button, and a protrusion is set on the machine head assembly. The protrusion will be blocked by the positioning ribs, and the locking button can only rotate freely between the two positioning ribs. The locking force is achieved by adjusting the compression of the spring through the locking nut.

[0022] 5. The present invention is provided with a detachable lower saw blade guard. The saw blade lower guard and the machine head assembly cooperate to achieve complete sealing of the saw blade. The cut dust can be guided along the arc of the lower guard to the retaining frame and then to the dust suction port to be sucked away. This is both safe and can achieve dust-free cutting in the table saw state. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required to be used in the description of the embodiments or the prior art.

[0024] Figure 1 is a stereogram of the present invention; Figure 2 yes Figure 1 The expanded stereogram of Figure 3 yes Figure 1 The main view; Figure 4 yes Figure 1 Upward-looking stereo Figure 1 ; Figure 5 yes Figure 1 Upward-looking stereo Figure 2 ; Figure 6 yes Figure 1 an enlarged view of the locking member described in; Figure 7 yes Figure 1 An enlarged view of the locking hook plate described in; Figure 8 yes Figure 1 An enlarged view of the protrusions and retaining ribs described in .

[0025] Fig. 9 yes Figure 1 An enlarged view of the locking structure described in; Fig.10 yes Figure 1 Left side view; Fig.11 yes Fig.10 Schematic diagram of the internal structure.

[0026] Reference numerals: 1- Base; 2- workbench, 21- workbench hook storage cavity; 3-machine head assembly, 31-motor, 32-saw blade upper guard, 33-saw blade, 34-machine head handle; 4-folding wing assembly, 41-wing table, 42-first support member, 421-lower connecting arm, 422-adjusting rod, 43-second support member, 44-buffer pad; 5-folding wing locking assembly, 51-locking piece, 511-locking shaft, 512-locking handle, 513-locking hook, 514-elastic element, 515-nut, 52-locking hook plate; 6- saw blade lower guard; 7-wing table positioning assembly, 71-positioning pin, 72-positioning pin hole; 8-front end locking support assembly, 81-workbench hook, 82-locking structure, 821-locking button, 822-bolt, 823-spring, 824-locking nut, 83-protrusion, 84-positioning rib. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0028] In the description of the embodiments of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] like Figure 1-Figure 11 As shown, a multifunctional miter saw disclosed in this embodiment includes a miter saw body consisting of a base 1, a workbench 2, and a head assembly 3. The workbench 2 is movably mounted on the base 1, a bracket is mounted at the rear end of the workbench 2, and the head assembly 3 is hingedly mounted on the bracket.

[0030] Structurally, the head assembly 3 is mainly composed of components such as a motor 31, a saw blade guard, a saw blade 33 and a head handle 34. The saw blade upper guard 32 is a detachable guard located on the top of the saw blade guard. The saw blade 33 is mounted on the rotating shaft of the motor 31 and is driven by the motor 31. The head assembly 3 can rotate vertically relative to the workbench 2 at the hinge point at the rear end. At the same time, the workbench 2 itself can also rotate in a plane on the base 1. When used as a miter saw, the material to be cut is fixedly placed on the workbench 2 of the base 1, and the head assembly 3 is pushed to drive the saw blade 33 to move toward the material, and then the saw blade 33 is used to rotate, generally using the lower part of the saw blade 33 to cut the material. In addition to right-angle cutting, the miter saw can also achieve bevel cutting as needed.

[0031] The specific structure of the head assembly 3 and the miter saw body can refer to the applicant's previous technical solution content of "Application No. 201610476896.X, named integrated dust suction motor and miter saw".

[0032] As can be seen from the above structural description of the head assembly 3, the head assembly 3 is generally heavy due to the integration of the motor 31, the saw blade 33 and the mounting bracket. When used as a miter saw, the weight of the head assembly 3 itself can be used to press down the cutting, and at the same time, it can also ensure that the saw blade 33 is not easily affected by vibration during cutting, thereby ensuring cutting accuracy.

[0033] However, when using the table saw mode, it is necessary to open the saw blade upper guard 32, place the material on the upper workbench (after the wing table is raised), and push the material to move toward the saw blade 33. Generally, the upper part of the saw blade 33 is used to cut the material. At this time, the connection between the head assembly 3 and the workbench 2 is only the rear bracket. If the heavy head assembly 3 lacks a stable support and locking structure, it is very easy to vibrate, thereby affecting the cutting quality and accuracy of the material.

[0034] In addition, as a compound saw or a multi-functional miter saw, the convenience of switching between multiple modes and the folding wings themselves are also key points of the structure.

[0035] like Figure 1-Figure 3As shown, the present invention symmetrically installs a folding wing assembly 4 on both sides of the base 1, and the wing assembly includes a wing table 41 and an L-shaped wing bracket. The upper end of the wing bracket is hinged to the wing table 41, and the lower end of the wing bracket is hinged to the base 1, and the inner angle of the wing bracket is greater than 90°.

[0036] The top surface of the wing table 41 is a flat structure, with scales on the front and back sides to facilitate the measurement of the length of the material. The bottom of the wing table 41 is fixed with a mounting seat, a locking member 51 in the folding wing locking assembly 5, and a positioning pin 71 in the wing table positioning assembly 7. In order to reduce the weight of the wing table 41, the middle part of the wing table 41 can be opened with a hollow strip opening, an arc opening, etc., which can also improve the aesthetics of the wing table 41 and the overall miter saw.

[0037] The inner angle of the wing support is set to be greater than 90°. On the one hand, the compactness of the overall structure of the present invention can be maintained; on the other hand, support can be provided to the wing table 41 and the head assembly 3 as well as an inward extrusion force, thereby ensuring the connection stability between the wing table 41 and the head assembly 3 on both sides and improving the cutting effect.

[0038] The wing-spreading table 41 can be folded and raised on both sides of the base 1. When raised, the two wing-spreading tables 41 can be relatively buckled on both sides of the head assembly 3 as an upper workbench; when the wing-spreading table 41 is folded and lowered, the wing-spreading table 41 can be used as an extension surface of the workbench 2.

[0039] By folding the wing assembly 4, the multifunctional miter saw can be conveniently switched between the table saw mode and the miter saw mode, thereby increasing the application scope of the present invention.

[0040] like Figure 4-Figure 7 In the present invention, a folding wing locking assembly 5 is arranged between the wing table 41 and the nose assembly 3 .

[0041] The folding wing locking assembly 5 includes a locking member 51 and a locking hook plate 52, wherein the locking member 51 is mounted at the bottom of the wing table 41, and the locking hook plate 52 is mounted on the side of the head assembly 3. By providing the folding wing locking assembly 5, the connection performance between the wing table 41 and the head assembly 3 can be improved.

[0042] The locking member 51 includes a locking shaft 511, a locking handle 512, and a locking hook 513. The middle part of the locking shaft 511 is sleeved in a mounting seat set on the wing table 41, and the locking shaft 511 is fixedly installed with the locking handle 512 and the locking hook 513 on both sides of the mounting seat; a locking cavity is set on the locking hook plate 52; when the locking handle is rotated downward, the locking hook 513 is driven to hook the locking hook 513 plate, so that the folding wing assembly 4 and the head assembly 3 are locked; when the locking handle is rotated upward, the locking hook 513 is driven to disengage from the locking hook 513 plate, so that the folding wing assembly 4 and the head assembly 3 are separated.

[0043] The connection and locking between the wing table 41 and the nose assembly 3 can adopt a variety of structures and methods. The folding wing locking assembly 5 adopted in the present invention is easy to operate and has a firm locking.

[0044] When in use, the locking handle is turned downward to hook the locking hook 513 onto the locking hook 513 plate, and the entire folding wing assembly 4 will not fall out; the locking handle is turned upward to leave the locking hook 513 from the locking hook 513 plate, and the folding wing assembly 4 can be opened downward.

[0045] In addition, there is an inclined surface on the locking hook 513 to facilitate the cooperation with the locking cavity on the locking hook plate 52, and the more the locking hook 513 rotates downward, the tighter the lock is.

[0046] like Fig.10 , Fig.11 In the present invention, a detachable saw blade lower guard 6 is installed on the base 1. The saw blade lower guard 6 is a semicircular shell with an open opening. The semicircular shell is buckled on the lower part of the head assembly 3. The bottom of the saw blade lower guard 6 is provided with a plane matching with the workbench 2, and the inner side of the saw blade lower guard 6 is arc-shaped.

[0047] By cooperating with the saw blade lower guard 6 and the machine head assembly 3, the saw blade 33 can be completely sealed, and the cutting dust can be guided along the arc of the lower guard to the retaining frame and then sucked away at the dust suction port, which is both safe and can achieve dust-free cutting in the table saw state.

[0048] Continue to see Figure 2 , Figure 3 As shown, the wing support of the present invention includes a first support member 42 and a second support member 43, the first support member 42 is fixedly connected to one end of the second support member 43, the other end of the second support member 43 is hinged to the mounting ear at the bottom of the wing table 41, and the other end of the first support member 42 is hinged to the base 1.

[0049] like Figure 2 , Figure 3 In the unfolded (folded) state of the folding wing assembly shown, the first support member 42 is a longer horizontally inclined support portion in the wing support bracket. At this time, one end of the first support member 42 is hinged to the base, and the other end of the first support member 42 is in contact with the support plane; the second support member 43 is a shorter vertically inclined support portion in the wing support bracket. At this time, the lower end of the second support member 43 is in contact with the support plane, and the upper end of the second support member 43 is hinged to the bottom of the wing support table 41.

[0050] When the wing platform 41 rises, the upper edge of the second support member 43 forms a horizontal support for the wing platform 41; when the wing platform 41 is folded and lowered, the top of the second support member 43 and the inner middle part of the first support member 42 cooperate to form a horizontal support for the wing platform 41.

[0051] Compared with a vertical rod-shaped or plate-shaped support, the L-shaped wing support formed by the first support member 42 and the second support member 43 of the integrated structure provides a more stable and firm support to the wing table 41 and can form a triangular support effect.

[0052] When the folding wing assembly 4 is opened or folded, it will not pinch the user, and the conversion effect between the two modes is better. In addition, when used as a table saw, by cooperating with the head assembly 3, the horizontality and support stability of the wing table 41 can be better guaranteed. When used as a miter saw, the second support member 43 and the middle part of the first support member 42 cooperate to make the wing table 41 more stable and ensure that it is consistent with the plane of the workbench 2.

[0053] like Figure 3 , Figure 4 As shown, an adjustment rod 422 is provided in the middle of the inner side of the first support member 42 of the present invention, and the adjustment rod 422 is used for supporting and adjusting the horizontality of the wing-spreading table 41 when it is folded and landed; one end of the adjustment rod 422 is provided in a screw hole on the first support member 42, and the other end of the adjustment rod 422 contacts the bottom of the wing-spreading table 41.

[0054] The adjustment rod 422 can be provided to adjust the horizontality of the wing table 41 and can also isolate vibration conduction.

[0055] like Figure 1 , Figure 2 As shown, a plurality of reinforcing ribs are arranged inside the first support member 42 and the second support member 43; a buffer pad 44 is coated on the periphery of the connection part between the first support member 42 and the second support member 43; and the thickness of the first support member 42 and the second support member 43 decreases from the connection part to the outside.

[0056] The reinforcing ribs on the wing bracket and the thickness of the first support member 42 and the second support member 43 can reduce the overall weight of the folding wing assembly 4. In order to optimize the structure of the wing bracket, the lower part of the first support member 42 can also be set as a lower connecting arm 421, and the lower connecting arm 421 is hinged with the base 1 to better reduce the weight and improve the folding conversion effect. The buffer pad 44 can improve the wear resistance and anti-slip performance of the wing bracket.

[0057] like Figure 6 As shown, the locking shaft 511 is provided with an elastic element 514 between the locking hook 513 and the mounting seat, and the elastic element 514 is used for the suspension positioning of the locking hook 513; the locking hook plate 52 is a strip plate, and both ends of the strip plate are fixed to the mounting posts on the side of the machine head assembly 3 by screws, and the gap between the strip plate and the machine head assembly 3 is used as a locking cavity. The locking shaft 511 passes through the outer end of the locking handle to install the nut 515.

[0058] An elastic element 514, such as a disc spring, a corrugated washer, etc., is added between the locking hook 513 and the mounting seat boss, and the nut 515 pulls the locking shaft 511, so that the locking hook 513 can be suspended and positioned at any position during the rotation process and will not fall freely under the action of gravity; at the same time, the locking force between the locking hook 513 and the locking hook 513 plate can be adjusted by the nut 515.

[0059] like Figure 4 , Figure 6 As shown, the present invention installs a wing table positioning assembly 7 on both sides of the folding wing locking assembly 5, and the wing table positioning assembly 7 includes a positioning pin 71 and a positioning pin hole 72. The positioning pin 71 is installed at the bottom of the wing table 41, and the positioning pin hole 72 is provided on the side of the nose assembly 3.

[0060] The wing table positioning assembly 7 can ensure that the two wing tables 41 on both sides of the nose assembly 3 are positioned and leveled uniformly, and at the same time, can also achieve rapid connection and locking between the locking hook 513 and the locking hook 513 plate.

[0061] like Figure 1 , Figure 4 As shown, the present invention sets a front locking support assembly 8 between the front end of the workbench 2 and the head assembly 3. The front locking support assembly 8 includes a workbench hook 81 and a front locking member 51. The lower end of the workbench hook 81 is hinged to the front end of the workbench 2 through a rotating shaft. The front locking member 51 is arranged at the front end of the head assembly 3. The workbench hook 81 can be rotated, folded and lifted around the rotating shaft. like Figure 7-Figure 9 As shown, the front end locking member 51 of the present invention includes a locking hook groove and a locking structure 82. The locking hook groove is arranged on the head assembly 3, and the locking hook groove cooperates with the hook portion at the upper end of the workbench hook 81. The locking structure 82 includes a locking button 821, a bolt 822, a spring 823, and a locking nut 824. The bolt 822 is arranged in the mounting hole of the machine head assembly 3. The locking nut 824 is installed at the inner end of the bolt 822, and the locking button 821 is installed at the outer end of the bolt 822. The spring 823 is mounted on the outer periphery of the bolt 822 between the locking nut 824 and the mounting hole. When the workbench hook 81 is raised, the rotating locking button 821 can block the hook part of the workbench hook 81 in the hook groove.

[0062] Two locking ribs 84 are arranged at intervals on the locking button 821, and a protrusion 83 is arranged on the head assembly 3. The protrusion 83 cooperates with the locking rib 84 to limit the locking button 821 from rotating between the two locking ribs 84; the upper part of the workbench hook 81 is a U-shaped structure, and the hook part is installed at the upper ends of the two side edges of the U-shaped structure; when the locking button 821 blocks the hook part of the workbench hook 81 in the hook groove, the bolt 822 is located between the two side edges of the U-shaped structure, and the locking button 821 is located on the front side of the workbench hook 81; the locking hook groove is a trapezoidal opening, and the hook part of the workbench hook 81 is a trapezoidal block that cooperates with the trapezoidal opening.

[0063] When the front locking support assembly 8 of the miter saw is used, the locking button 821 is opened, the table hook 81 is rotated into the hook groove at the front end of the machine head assembly 3, and then the locking button 821 is rotated in the opposite direction to block the hook portion of the table hook 81 in the hook groove to ensure that the table hook 81 will not fall out. The two positioning ribs 84 on the locking button 821 and the protrusion 83 on the machine head assembly 3 allow the locking button 821 to rotate freely only between the two positioning ribs 84. The locking force is achieved by adjusting the compression amount of the spring 823 through the locking nut 824.

[0064] Providing a locking support assembly 8 at the front end of the miter saw can enhance the supporting effect of the head assembly 3 in the table saw mode. A workbench hook storage cavity 21 is provided on the workbench 2. The workbench hook 81 can be stored below the plane of the workbench 2 after being folded, without affecting the use of materials placed on the workbench 2.

[0065] The present invention can be used in table saw or miter saw mode, specifically: When used in table saw mode: the head assembly 3 can rotate around the rotating shaft hinged at the rear end of the workbench 2; the workbench hook 81 can rotate around the rotating shaft hinged to the base 1 at the lower end, so that the hook can hook the locking hook groove of the head assembly 3, and then use the locking button 821 to lock it; the folding wing assembly 4 can rotate around the rotating shaft hinged to the base 1 at the lower end, and the wing table 41 can rotate around the rotating shaft hinged to the wing bracket; the positioning pin 71 on the wing table 41 passes through the positioning pin hole 72, and the locking handle is rotated to make the locking hook 513 hook the locking hook 513 plate, and the wing table 41 assembly and the head are connected as one, which is the table saw state.

[0066] At this time, due to the support of the folding wing assembly on both sides, the strength is better, and the wing tables 41 on both sides are used at the same time, so the supporting area is larger.

[0067] When used in the miter saw mode: rotate the locking handle in the opposite direction to disengage the locking hook 513 from the locking hook 513 plate; then, hold the wing table 41 or the wing bracket and pull it outward to disengage the positioning pin 71 from the positioning pin hole 72; the wing table 41 is folded and placed on both sides of the base 1, and the wing table 41 is flush with the workbench 2, and can be used as an extended table for cutting long materials.

[0068] The locking button 821 is opened, the workbench hook 81 and the head assembly 3 are separated, and the workbench hook 81 can be rotated to the workbench hook storage chamber 21, which is lower than the plane of the workbench 2. The lower guard is removed without affecting the material cutting in the miter saw state. At this time, the miter saw state is exactly the same as a conventional miter saw, and the upper workbench of the head assembly 3 will not block the line of sight, nor will the upper workbench increase the weight of the head assembly 3, causing inconvenience in use.

[0069] The technical contents not described in detail in the present invention are all known technologies.

Claims

1. A multifunctional miter saw, comprising a miter saw body consisting of a base, a workbench, and a head assembly, wherein the workbench is movably mounted above the base, a bracket is mounted at the rear end of the workbench, and the head assembly is hingedly mounted on the bracket, characterized in that: The folding wing assembly is symmetrically installed on both sides of the base, and the wing assembly includes a wing table and an L-shaped wing bracket. The upper end of the wing bracket is hinged to the wing table, and the lower end of the wing bracket is hinged to the base. The inner angle of the wing bracket is greater than 90°; the wing table can be folded and lifted under the drive of the wing bracket. When the wing table is raised, the two sets of the wing tables can be relatively buckled on both sides of the head assembly as an upper workbench; when the wing table is folded and lowered, the wing table can be used as an extension surface of the workbench; a folding wing locking assembly is arranged between the wing table and the head assembly, and the folding wing locking assembly can be locked between the wing table and the head assembly. The wing locking assembly includes a locking piece and a locking hook plate, the locking piece is installed at the bottom of the wing table, and the locking hook plate is installed on the side of the nose assembly; the locking piece includes a locking shaft, a locking handle, and a locking hook, the middle part of the locking shaft is sleeved in the mounting seat set on the wing table, and the locking shaft is fixedly installed with the locking handle and the locking hook on both sides of the mounting seat; a locking cavity is set on the locking hook plate; when the locking handle is rotated downward, the locking hook is driven to hook the locking hook plate, so that the folding wing assembly and the nose assembly are locked; when the locking handle is rotated upward, the locking hook is driven to disengage from the locking hook plate, so that the folding wing assembly and the nose assembly are separated.

2. The multifunctional miter saw according to claim 1, characterized in that: A detachable lower saw blade guard is installed on the base. The lower saw blade guard is a semicircular shell with an open opening. The semicircular shell is buckled on the lower part of the head assembly. A plane matching the workbench is arranged at the bottom of the lower saw blade guard, and the inner side of the lower saw blade guard is arc-shaped.

3. The multifunctional miter saw according to claim 1, characterized in that: The wing spreading bracket includes a first support member and a second support member, the first support member is fixedly connected to one end of the second support member, the other end of the second support member is hinged to the mounting ear at the bottom of the wing spreading platform, and the other end of the first support member is hinged to the base; when the wing spreading platform is raised, the upper edge of the second support member forms a horizontal support for the wing spreading platform; when the wing spreading platform is folded and landed, the top of the second support member and the inner middle part of the first support member cooperate to form a horizontal support for the wing spreading platform.

4. The multifunctional miter saw according to claim 3, characterized in that: An adjustment rod is arranged in the middle of the inner side of the first support member, and the adjustment rod is used for supporting and adjusting the horizontality when the wing-spreading platform is folded and landed; one end of the adjustment rod is arranged in the screw hole on the first support member, and the other end of the adjustment rod contacts the bottom of the wing-spreading platform.

5. The multifunctional miter saw according to claim 3, characterized in that: A plurality of reinforcing ribs are arranged on the inner sides of the first support member and the second support member; a buffer pad is coated on the periphery of the connection part between the first support member and the second support member; and the thickness of the first support member and the second support member decreases from the connection part outwards.

6. The multifunctional miter saw according to claim 1, characterized in that: The locking shaft is provided with an elastic element at the position between the locking hook and the mounting seat. The elastic element is a disc spring or a corrugated pad. The elastic element is used for the suspended positioning of the locking hook. The locking hook plate is a strip plate. Both ends of the strip plate are fixed to the mounting columns on the side of the machine head assembly by screws. The gap between the strip plate and the machine head assembly serves as a locking cavity.

7. The multifunctional miter saw according to claim 1, characterized in that: The locking shaft passes through the outer end of the locking handle to install a nut, and the nut is used to adjust the locking force between the locking hook and the locking hook plate.

8. The multifunctional miter saw according to claim 1, characterized in that: Wing table positioning components are installed on both sides of the folding wing locking component. The wing table positioning components include positioning pins and positioning pin holes. The positioning pins are installed at the bottom of the wing table, and the positioning pin holes are arranged on the side of the nose component.

9. The multifunctional miter saw according to claim 1, characterized in that: A front end locking support assembly is arranged between the front end of the workbench and the machine head assembly, and the front end locking support assembly includes a workbench hook and a front end locking piece. The lower end of the workbench hook is hinged to the front end of the workbench through a rotating shaft, and the front end locking piece is arranged at the front end of the machine head assembly. The workbench hook can be rotated, folded and lifted around the rotating shaft; the front end locking piece includes a locking hook groove and a locking structure, and the locking hook groove is arranged on the machine head assembly, and the locking hook groove cooperates with the hook portion at the upper end of the workbench hook; the locking structure includes a locking button, a bolt, a spring and a locking nut, the bolt is arranged in the mounting hole of the machine head assembly, the locking nut is installed at the inner end of the bolt, the locking button is installed at the outer end of the bolt, and a spring is mounted on the outer periphery of the bolt between the locking nut and the mounting hole; when the workbench hook is raised, the rotating locking button can block the hook portion of the workbench hook in the hook groove.

10. The multifunctional miter saw according to claim 9, characterized in that: Two locking ribs are arranged on the locking button at intervals, and a protrusion is arranged on the machine head assembly, and the protrusion cooperates with the locking rib to limit the locking button to rotate between the two locking ribs; the upper part of the workbench hook is a U-shaped structure, and the hook is installed at the upper ends of both side edges of the U-shaped structure; when the locking button blocks the hook of the workbench hook in the hook groove, the bolt is located between the two side edges of the U-shaped structure, and the locking button is located on the front side of the workbench hook; the locking hook groove is a trapezoidal opening, and the hook of the workbench hook is a trapezoidal block that cooperates with the trapezoidal opening.

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