CN117505983A

CN117505983A - miter saw

Info

Publication number: CN117505983A
Application number: CN202210893081.7A
Authority: CN
Inventors: 孙方勇; 张长宁; 甘行年; 陈智丰
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2024-02-06

Abstract

The application discloses miter saw includes: a base; the workbench rotates relative to the base by taking the inclined cutting axis as a shaft; a first operating part for driving the locking mechanism to provide locking force through the first transmission assembly; a first operation section including: a first position corresponding to the relative rotation of the locking base and the workbench and a second position corresponding to the relative rotation of the releasing base and the workbench; a second operation part which is positioned in a range which can be operated by one hand simultaneously with the first operation part; the positioning mechanism is driven by the second transmission assembly to release the limit between the workbench and the base at a preset position; the second operation portion includes, with respect to the first operation portion: and the third position is used for limiting the workbench and the base to preset positions correspondingly, and the fourth position is used for limiting the workbench and the base correspondingly by the release positioning mechanism. The miter saw is simple and convenient to operate.

Description

Miter saw

Technical Field

The present application relates to power tools, and more particularly to a miter saw.

Background

Miter saws are a type of bench tools capable of performing a cutting operation at an oblique angle, and generally include a rotatable and tiltable cutting system and a rotatable table. The rotation or rotation action needs to be controlled to a certain extent, and in the prior art, on one hand, the rotation or rotation control is not fine enough and can influence the operation precision of the miter saw, and on the other hand, the existing control structure is complex, the use is complex, and the work efficiency is reduced while the use experience of a user is influenced.

Therefore, the rapidness and accuracy of the conventional miter saw operation are technical problems to be solved in the art.

Disclosure of Invention

The utility model aims at providing a power tool, a convenient operation is swift, locking efficiency is high, multi-functional miter saw.

In order to achieve the above object, the present application adopts the following technical scheme:

a miter saw, comprising: a base; the workbench is used for placing a workpiece and rotates relative to the base by taking the beveling axis as a shaft; the cutting mechanism is used for completing the cutting operation of the workpiece; the locking mechanism provides a locking force for locking the relative rotation of the base and the workbench; a positioning mechanism providing a plurality of preset positions and selectively limiting the workbench to the selected preset positions relative to the base; further comprises: the operating mechanism is used for holding and operating to enable the workbench to rotate relative to the base; comprising the following steps: a first operating part for driving the locking mechanism to provide locking force through the first transmission assembly; a first operation section including: a first position corresponding to the relative rotation of the locking base and the workbench and a second position corresponding to the relative rotation of the releasing base and the workbench; a second operation part which is positioned in a range which can be operated by one hand simultaneously with the first operation part; the positioning mechanism is driven by the second transmission assembly to release the limit between the workbench and the base at a preset position; the second operation portion includes, with respect to the first operation portion: and the third position is used for limiting the workbench and the base to preset positions correspondingly, and the fourth position is used for limiting the workbench and the base correspondingly by the release positioning mechanism.

In some embodiments, the second transmission assembly includes a second transmission portion, and the driving force of the second operation portion drives the positioning mechanism to deform through the second transmission portion, where the second transmission portion includes at least a part of a flexible structure, so that the second transmission portion deforms under the action of an external force.

In some embodiments, the flexible structure comprises a steel cord.

In some embodiments, one end of the second transmission part is wound on the second operation part, the other end of the second transmission part is connected with the positioning mechanism, and the length of the second transmission part is larger than the distance between the second operation part and the positioning mechanism.

In some embodiments, the second transmission assembly further includes a tension adjusting portion disposed at an end of the second transmission portion near the second operation portion for adjusting a length of the second transmission portion between the second operation portion and the positioning mechanism.

In some embodiments, the first operation portion includes: a first trigger operable and movable between a first position and a second position; and a first limit structure formed on or attached to the first handle for maintaining the first handle in the first position.

In some embodiments, the second operation portion includes: a second handle disposed on the first handle for operation and movable between a third position and a fourth position; a biasing element provides a biasing force that returns the second trigger from the fourth position to the third position.

In some embodiments, the operating mechanism further comprises: a limit assembly to retain the second handle in the fourth position; the limiting assembly comprises a first limiting part arranged on the second operating part and a second limiting part matched with the first limiting part and arranged on the first operating part.

In some embodiments, the first transmission assembly includes: the first transmission rod is connected with the locking mechanism, and the first transmission part is of a rigid structure and can reciprocate between the first operation part and the locking mechanism; and a second driving part disposed between the first operating part and the first transmission rod, the second driving part converting the reciprocating motion of the first operating part into the reciprocating motion of the first transmission rod.

In some embodiments, the miter saw further comprises: the supporting seat is connected with the cutting mechanism and the workbench; the supporting seat is arranged at the first end of the workbench; the operating mechanism is connected to the workbench and at least partially arranged at the second end of the workbench.

The utility model provides a miter saw, convenient operation to workstation rotary motion locking, location, multiple function collection in same operating piece realizes real single hand operation, easy operation is convenient. The locking and the positioning of the workbench are controlled by mutually independent transmission mechanisms, so that the use efficiency and the use feeling of a user are improved.

Drawings

FIG. 1 is a block diagram of a first embodiment in the present application;

FIG. 2 is a schematic diagram of the top view of FIG. 1;

FIG. 3 is a schematic illustration of an exploded view of the other view of FIG. 1;

FIG. 4 is a block diagram of a portion of the components of FIG. 1;

FIG. 5 is a block diagram of a top view of a portion of the components of FIG. 4;

FIG. 6 is a block diagram of a bottom view of a portion of the components of FIG. 4;

FIG. 7 is a partial block diagram of FIG. 4 showing the operating handle in a second position;

FIG. 8 is a block diagram of the first locking mechanism of the first embodiment of the present application with the operating handle in the second position;

FIG. 9 is a schematic view of another view of FIG. 8;

FIG. 10 is a block diagram of the first locking mechanism of the first embodiment of the present application with the operating handle in a first position;

FIG. 11 is a schematic view of the other view of FIG. 10;

FIG. 12 is a block diagram of the first locking mechanism of the first embodiment of the present application showing the operating handle in a third position;

FIG. 13 is a schematic view of the other view of FIG. 12;

FIG. 14 is a schematic view of the portion of FIG. 13;

fig. 15 is a structural view of a clutch portion in the first embodiment in the present application;

FIG. 16 is a block diagram of the work table, base, locking mechanism, positioning mechanism and operating mechanism of the first embodiment of the present application;

FIG. 17 is an exploded view of FIG. 16;

FIG. 18 is a schematic view of another view of FIG. 16;

FIG. 19 is a cross-sectional view of A-A in FIG. 18;

FIG. 20 is a cross-sectional view of B-B in FIG. 18;

FIG. 21 is a schematic view of a portion of the structure of the locking mechanism, positioning mechanism and operating mechanism of FIG. 16 wherein the first handle shows a portion of the internal structure, the first handle being shown in a second position and the second handle being shown in a third position;

FIG. 22 is a schematic view of a portion of the structure of the locking mechanism, positioning mechanism and operating mechanism of FIG. 16, wherein the first handle shows a portion of the internal structure, and wherein the first handle is in a second position and the second handle is in a fourth position;

FIG. 23 is a schematic view of a portion of the structure of the locking mechanism, positioning mechanism and operating mechanism of FIG. 16 wherein the first handle shows a portion of the internal structure, the first handle being shown in a first position and the second handle being shown in a fourth position;

fig. 24 is a schematic view of a part of the structure of the first operation portion in fig. 16;

fig. 25 is a structural view of a first operation portion and a second operation portion of a second embodiment in the present application;

FIG. 26 is a schematic view of another view of FIG. 25;

FIG. 27 is an exploded view of a portion of the structure of FIG. 25;

FIG. 28 is a schematic view of a portion of the first handle of FIG. 25;

FIG. 29 is a schematic view of a portion of the structure of FIG. 25 from another perspective;

fig. 30 is a partial exploded view of a first operating portion and a second operating portion of a third embodiment in the present application;

fig. 31 is an exploded view of a portion of the structure of fig. 30;

fig. 32 is a structural view of a first operation portion and a second operation portion of a fourth embodiment in the present application;

FIG. 33 is a schematic view of the structure of FIG. 32 from another perspective;

FIG. 34 is an exploded view of a portion of the structure of FIG. 33;

fig. 35 is a structural view of a first operation portion and a second operation portion of a fifth embodiment in the present application;

FIG. 36 is an exploded view of a portion of the structure of FIG. 35;

fig. 37 is a structural view of a first operation portion and a second operation portion of a sixth embodiment in the present application;

FIG. 38 is an exploded view of a portion of the structure of the other view of FIG. 37;

fig. 39 is a structural view of a first operation portion and a second operation portion of a seventh embodiment in the present application;

FIG. 40 is an exploded view of a portion of the structure of FIG. 39;

fig. 41 is a structural view of a second transmission assembly of an eighth embodiment in the present application.

Detailed Description

The present application is described in detail below with reference to the attached drawings and specific embodiments.

In the description of the present application, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

For clarity of description of the technical solutions of the present application, upper side, lower side, left side, right side, front side and rear side are defined in the drawings of the specification.

Fig. 1 to 24 show a miter saw 100 according to a first embodiment of the present application. The miter saw 100 includes a base 11, a table 12, a cutting mechanism 13, a support mechanism 14, and a power supply mechanism 70.

As shown in fig. 1 to 3, the base 11 is used to support the table 12, and it is understood that the base 11 is used to support the entire miter saw 100. The miter saw 100 can be smoothly placed on the ground or an operation plane by the base 11. Specifically, the base 11 is located below the table 12, and the cutting mechanism 13 is located above the table 12.

The cutting mechanism 13 comprises a cutting member 131 and a motor 132, the cutting member 131 being adapted to perform the cutting function of the miter saw 100, in particular a circular saw blade, the motor 132 being adapted to provide a source of power for driving the cutting member 131 to rotate in a cutting plane S, thereby performing a cutting of a workpiece placed on the table 12 by the cutting member 131.

As shown in fig. 1 to 4, the support mechanism 14 includes a frame 141 and a rail assembly 142. The cutting mechanism 13 further includes a connector 133 that connects the cutting mechanism 13 to the rail assembly 142. A rail assembly 142 is provided on the frame 141, the rail assembly 142 including a rail 1421. The connection member 133 is formed with a through hole 1331 through which the rail assembly 142 passes, the slide rail 1421 is disposed through the through hole 1331, the through hole 1331 has a certain depth, and the rail assembly 142 can move in the front-rear direction within the through hole 1331. One end of the rail assembly 142 is provided with a stopper 1422 to prevent the rail assembly 142 from being separated from the through hole 1331. The cutting mechanism 13 may be pivotally connected to the connector 133, i.e. the cutting mechanism 13 may be rotatable about the working axis 104. The cutting member 131 is brought gradually closer to the workpiece for cutting work or gradually farther away from the workpiece when the cutting work is completed by rotating the cutting mechanism 13 about the work axis 104.

In the present embodiment, the cutting mechanism 13 further includes: a shield 134 at least partially covering the cutting member 131. It will be appreciated that the shield 134 may also be fixedly attached to the connector 133, and that the shield 134 may further include a fixedly attached first shield 1341 and a second shield 1342 that rotates relative to the connector 133 for safety. Wherein the first shield 1341 always encloses at least part of the cutting member 131, and the second shield 1342 is capable of enclosing at least part of the cutting member 131 and preventing the cutting member 131 from being exposed to the extent that a user can directly contact it in an uncut state. When the user operates the handle 135, the cutting mechanism 13 rotates about the working axis 104 and gradually brings the cutting member 131 closer to the workpiece to perform a cutting operation, and as the user operates the handle 135 to gradually bring the cutting member 131 deeper into the workpiece, the second cover 1342 may gradually rotate in a direction away from the table 12 or away from the cutting member 131, thereby enabling the cutting member 131 to cut the workpiece. A traveling wheel 1343 is provided at the lower end of the shield 134 in contact with the table 12 to assist in moving the cutting mechanism 13 back and forth on the table 12.

The power mechanism 70 is used to provide power to the miter saw 100. In the present embodiment, the power supply mechanism 70 is a battery pack, and in the present embodiment, the power supply mechanism 70 is mounted on the support mechanism 14. In other alternative embodiments, also on the cutting mechanism 13. It will be appreciated that the location of the power mechanism 70 does not affect the scope of the present application, and that other alternatives, without any other inventive effort, may be provided in equivalent alternatives or equivalent variations, all falling within the scope of the present application. The battery packs cooperate with corresponding power supply circuitry to power corresponding components within the miter saw 100. It will be appreciated by those skilled in the art that the power supply mechanism 70 is not limited to the use of a battery pack, and may also be implemented to power the corresponding components within the machine by mains power, ac power, and in combination with corresponding rectifying, filtering and voltage regulating circuitry.

As shown in fig. 2 and 4 to 5, the table 12 is further formed with a first passage 121 penetrating itself in the up-down direction, the first passage 121 extending in the front-rear direction. The first end 121a of the first channel is located inside the table 12 and the second end 121b of the first channel extends outside the table 12, i.e. the front end of the cutting mechanism 13. The first channel 121 is configured to pass through and at least partially receive the first receiving chamber 1211 formed within the first channel 121 when the cutting member 131 breaks a workpiece. The table 12 and the second end 121b of the first channel provide support for the travel wheels 1343 of the shroud 134, the travel wheels 1343 moving on either side of the first receiving chamber 1211.

After the table 12 is positioned at the first end 121a of the first channel is the first end 12a of the table. The support base 15 is disposed at the first end 12a of the table, i.e. the support base 15 is disposed at the rear end of the cutting mechanism 13. Specifically, the support base 15 is pivotally connected to the frame 141, and the frame 141 can support and drive the cutting mechanism 13 to rotate around the first line 101 relative to the table 12. When the cutting mechanism 13 rotates about the first straight line 101 with respect to the table 12, it is possible to realize the inclined cutting of the workpiece in the vertical position, that is, when the cutting mechanism 13 rotates about the first straight line 101 with respect to the table 12, the cutting plane S formed by the cutting member 131 is inclined from the plane formed in the up-down direction.

Further, the first straight line 101 is located in the cutting plane S, and the cutting plane S also rotates about the first straight line 101. The table 12, the first channel 121 and the support base 15 are all substantially symmetrical in structure with respect to the first straight line 101. In the present embodiment, the first channel 121 also extends along the first straight line 101.

As shown in fig. 1-13, the miter saw 100 also includes a first locking mechanism 16. The first locking mechanism 16 includes at least: a first state, a second state, and a third state. When the first locking mechanism 16 is in the first state, the first locking mechanism 16 locks the rotation of the cutting mechanism 13 relative to the table 12 about the first straight line 101; when the first locking mechanism 16 is in the second state, the first locking mechanism 16 allows rotation of the cutting mechanism 13 relative to the table 12; the first locking mechanism 16 is operable to select a set position of rotation in a predetermined direction when the first locking mechanism 16 is in the third state, and the first locking mechanism 16 restricts movement of the cutting mechanism 13 in the predetermined direction beyond the set position after rotation of the cutting mechanism 13 in a predetermined direction when the first locking mechanism 16 is out of the third state. That is, when the first lock mechanism 16 is in the third state, the rotation of the cutter mechanism 13 can be positioned. In other words, when the first locking mechanism 16 is in the third state, the cutting mechanism 13 and the supporting seat 15 are in a free rotation state, and the operator can operate the cutting mechanism 13 to a set position and then operate the first locking mechanism 16 to leave the third state, so that the rotational positioning of the cutting mechanism 13 by the first locking mechanism 16 is completed. In this embodiment, the cutting mechanism 13 can be restrained from rotating in the other direction at the set position. In other alternative embodiments, movement may continue in the other direction, particularly with respect to the configuration of the first locking mechanism 16. The limited "set position" may be a point, i.e. a positioning point, or the cutting mechanism 13 may be movable within a certain range, with two adjacent positioning points, i.e. between the two positioning points. The "preset direction" may be a clockwise rotation about the first line 101 or a counterclockwise rotation about the first line 101 according to the actual requirement of the operator.

The first locking mechanism 16 includes: an operating handle 160 is provided at the second end 12b of the table for operation to switch the state of the first locking mechanism 16. It will be appreciated that the "second end 12b of the table" refers to an end that is not the same or on a different side than the first end 12a of the table, and is not limited to the "second end 12b of the table" being the end that is directly opposite the "first end 12a of the table". In the present embodiment, for convenience of an operator, the operation handle 160 is provided at one side 12b1 of the second end 12b of the table. In the present embodiment, the entirety of the first locking mechanism 16 extends substantially along the first straight line 101.

The operation handle 160 includes at least a first position corresponding to a first state, a second position corresponding to the second state, and a third position corresponding to a third state; the operating handle 160 is switched among the first position, the second position, and the third position by reciprocating in the first direction F1. In the present embodiment, the operation handle 160 is reciprocally rotated in the first direction F1 about the second straight line 102 as an axis to switch the state of the first lock mechanism 16. In this embodiment, the second line 102 is parallel to or coincides with the first line 101. Of course, the second straight line 102 and the first straight line 101 may intersect. In other alternative embodiments, the operating handle 160 may also reciprocate linearly, i.e., slide translationally, along the first direction F1. Limiting the movement of the operating handle 160 in switching at least three operating states of the first locking mechanism 16 to one direction facilitates the operator's operation and the switching action is more continuous and simple. On the other hand, one operation handle 160 can be switched between three states, which is more beneficial for the operator to operate with one hand. To improve the comfort of the operator in switching the operating handle 160, the edge of the operating handle 160 does not exceed the bottom surface of the base 11 when the three positions are switched. This prevents the operator from interfering with the placement surface or the ground when using the operation handle 160.

The operating handle 160 moves between the first position, the second position, and the third position by an external force, as shown in fig. 7 to 12. Wherein the second position is located between the first position and the third position, and the second position is an initial position. It should be noted that the first position, the second position, or the third position is not necessarily limited to the position shown in the figure, which is the limit or critical position for realizing the state of the first locking mechanism 16 in the present embodiment, and the first locking mechanism 16 may be considered to have reached the corresponding position as long as it can realize the function described in the state, and may be a position between the first position, the second position, or the third position shown in the figure.

The first locking mechanism 16 further includes: a locking assembly 161 and a stop assembly 163. Wherein the locking assembly 161 provides a locking force that locks the relative rotation of the cutting mechanism 13 and the table 12. The locking assembly 161 includes an operating state in which a locking force for locking the relative rotation of the cutting mechanism 13 and the table 12 is provided and a releasing state in which the locking force for locking the relative rotation of the cutting mechanism 13 and the table 12 is released. The first state of the first locking mechanism 16 is that the locking assembly 161 is in an operating state when the operating handle 160 is in the first position. The second or third state of the first locking mechanism 16 is when the operating handle 160 is in the second or third position, and the locking assembly 161 is in the released state. The stopping assembly 163 provides a plurality of preset positions and limits the cutting mechanism 13 from continuing to move in the preset direction after the set position is selected by the operating handle 160. The stop assembly 163 includes a positioning state that can be selected among a plurality of preset positions, at which time the cutting mechanism 13 can be rotated and a restricting state that restricts the cutting mechanism 13 from continuing to move in the preset direction beyond the selected set position. The third state of the first locking mechanism 16 is the detent assembly 163 is in the positioned state when the operating handle 160 is in the third position. When the first locking mechanism 16 is moved away from the third state, i.e. the operating handle 160 is moved away from the third position, the stop assembly 163 limits the movement of the cutting mechanism 13 in the preset direction, and the stop assembly is in a limited state.

The first locking mechanism 16 further includes: a driving assembly 162 formed on or connected to the operating handle 160, the driving assembly 162 being connected to the locking assembly 161 and the stopping assembly 163, respectively.

Wherein the driving assembly 162 includes a first driving lever 1621 coupled to or formed at the operating handle 160, a second driving lever 1622 coupled to the locking assembly 161, and a first transmission portion 1623 coupled to the stopping assembly 163, wherein the second driving lever 1622 is coupled to or formed at the first driving lever 1621, and the first transmission portion 1623 is coupled to or formed at the first driving lever 1621. Further, to realize the switching of three states by one operation handle 160, the one-hand operation of the operator is facilitated. It will be appreciated that one operating handle 160 drives the first driving lever 1621, and the first driving lever 1621 controls the locking assembly 161 and the stopping assembly 163 via the second driving lever 1622 and the first transmission 1623, respectively.

In this embodiment, the first driving lever 1621 is directly connected to the operating handle 160, and the first driving lever 1621 and the operating handle 160 rotate about the second straight line 102. It will of course be appreciated that the first drive lever 1621 may be the same component as the operating handle 160. In this embodiment, the first driving rod 1621 and the second driving rod 1622 also rotate along the second straight line 102.

The support base 15 is fixedly connected with the workbench 12, and the rack 141 is pivotally connected with the support base 15. The frame 141 sequentially includes a pivot portion 1411, an extension portion 1412, and a connection portion 1413, where the pivot portion 1411 is pivoted to the support base 15 and transmits rotation of the frame 141, the extension portion 1412 extends upward relative to the table 12, the connection portion 1413 connects the pivot portion 1411 and the connection portion 1413, and the connection portion 1413 connects the connection member 133. The pivot 1411 and the support base 15 may communicate with one accommodation space, which in this embodiment is the second accommodation space 14a. It will be appreciated that the rotation of the cutting mechanism 13 relative to the table 12 about the first line 101 is achieved by rotation of the frame 141 relative to the support base 15 about the first line 101. Meanwhile, the locking assembly 161 and the stopping assembly 163 are substantially disposed in the second receiving space 14a.

As shown in fig. 8 to 15, the locking assembly 161 includes: the first fixing member 1611 is movably connected to the second driving rod 162, and the first fixing member 1611 is fixedly connected to the supporting seat 15. A second mount 1612 is coupled to an end of the second driving rod 1622. The locking piece 1613 is penetrated by the second driving rod 1622 and disposed between the first fixing piece 1611 and the second fixing piece 1612. A first elastic member 1614 disposed between the locking piece 1613 and the second fixing member 1612. Further, the second driving rod 1622 is terminated away from the first driving rod 1621 by a second end 1622b, and the second end 1622b is provided with a threaded section. The first fixing member 1611 and the locking piece 1613 are fixedly connected with the housing of the supporting seat 15, the second fixing member 1612 is fixedly connected with the second end 1622b of the second driving rod 1622, the first elastic member 1614 is disposed between the second fixing member 1612 and the locking piece 1613, and part of the housing of the supporting seat 15 and the frame 141 is disposed between the second fixing member 1612 and the locking piece 1613. When the second driving rod 1622 is driven by the operating handle 160 to rotate about the second straight line 102, that is, the operating handle 160 rotates from the second position to the first position, the second driving rod 1622 moves forward of the miter saw 100 along the second straight line 102, the second fixing member 1612 presses the first elastic member 1614 and further presses the locking piece 1613 and the housing of the supporting seat 15 to the first fixing member 1611, so that the locking assembly 161 locks the supporting seat 15 and the frame 141 to rotate, the locking assembly 161 is in an operating state, and the first locking mechanism 16 reaches the first state. When the second driving rod 1622 is driven by the operating handle 160 to rotate in the opposite direction about the second straight line 102, that is, when the operating handle 160 rotates from the first position to the second position, the second driving rod 1622 moves backward of the miter saw 100 along the second straight line 102, and under the restoring force of the first elastic member 1614, the second driving rod 1622 more rapidly drives the second fixing member 1612 to separate from the locking piece 1613, so as to unlock the locking assembly 161, the locking assembly 161 is in a released state, and the rotational movement of the cutting mechanism 13 is released, so that the first locking mechanism 16 can enter the second state or the third state.

The locking assembly 161 further includes a clutch portion 1615 connecting the first and second drive levers 1621, 1622, the clutch portion 1615 further serving to limit movement of the first drive lever 1621 in the direction of the second line 102 rearward of the miter saw 100, i.e., to limit further movement during release. As shown in fig. 15, the clutch portion 1615 includes a first clutch member 1615a and a second clutch member 1615b, and the first clutch member 1615a and the second clutch member 1615b have one surface engaged with each other, respectively. Specifically, the first clutch 1615a is fixed on the second driving rod 1622 and is also fixedly connected to the housing below the table 12, the second clutch 1615b is fixedly connected to the first driving rod 1621, and the first clutch 1615a and the second clutch 1615b each have a through hole for the first driving rod 1621 to pass through. Further, a surface of the first clutch member 1615a facing the second clutch member 1615b is provided with a stepped step 1615c, and the steps 1615c are sequentially increased along the second straight line 102 to reach a certain height, thereby forming a cross section. The surface of the second clutch 1615b facing the first clutch 1615a also has a shape that engages the first clutch 1615 a. The two surfaces have at least two steps 1615 c. The second clutch 1615b has a shaped hole 1615d at the center, the shaped hole 1615d is a through hole different from the round hole, and the corresponding first driving rod 1621 is provided with a bump, which can be snapped into the shaped hole to complete the fixed connection between the second clutch 1615b and the first driving rod 1621. Specifically, when the first clutch 1615a and the second clutch 1615b are engaged, the rotation of the first driving lever 1621 in the opposite direction of the second straight line 102 is limited by the clutch structure due to the limitation of the two sections.

The locking assembly 161 further comprises a second connecting piece 1616 arranged in front of the second clutch piece 1615b, a second elastic piece 1617 is arranged between the second connecting piece 1616 and the second clutch piece 1615b, and two ends of the second elastic piece 1617 are respectively connected with the second connecting piece 1616 and the second clutch piece 1615b. The second connecting piece 1616 is sleeved on the first driving rod 1621 and is movably connected with the first driving rod 1621, the first driving rod 1621 can slide and rotate in the second connecting piece 1616, and the second connecting piece 1616 is fixedly connected with the shell of the workbench 12. When the first driving rod 1621 rotates around the second straight line 102, the first driving rod 1621 moves forward of the miter saw 100 along the second straight line 102, the locking assembly 161 is locked, and the second clutch 1615b moves along the step 1615c under the driving of the first driving rod 1621 until the second clutch 1615a is separated from the first clutch 1615a under the driving of the second elastic member 1617. When the first driving rod 1621 rotates around the second straight line 102 along the opposite direction, the first driving rod 1621 moves backward of the miter saw 100 along the second straight line 102, the second clutch 1615b is driven by the first driving rod 1621 to approach the first clutch 1615a, when the two surfaces are engaged and the second elastic member 1617 is pressed, the cross sections of the two surfaces are clamped, so that the second clutch 1615b cannot move further, further movement of the first driving rod 1621 is limited, and the critical state after unlocking is reached, so that the cutting system can complete movement after unlocking.

The stopper assembly 163 includes: a positioning block 1631 and a positioning pin 1632. The positioning block 1631 is disposed in the frame 141 and is indirectly connected to the cutting mechanism 13, and it is understood that the positioning block 1631 may be directly connected to the cutting mechanism 13. The positioning block 1631 is provided with a plurality of matching parts 1631a, in this embodiment, the matching parts 1631a are a plurality of positioning holes, and each positioning hole rotates to a different angle corresponding to the frame 141. The positioning pin 1632 is connected to the first transmission portion 1623, the positioning pin 1632 reciprocates substantially in a direction parallel to the second straight line 102, and the positioning pin 1632 is connected to any one of the engagement portions 1631a to limit the continued rotational movement of the cutting mechanism 13. The positioning pin 1632 is at least partially connected to the housing of the support base 15 such that the positioning pin 1632 can only move in a direction parallel to the second line 102.

The first transmission part 1623 includes an eccentric block 1623a, a flexible connection 1624, and a first transmission block 1626. Wherein the eccentric block 1623a connects the first transmission block 1626 and the flexible connection member 1624. The first transmission block 1626 is connected to the first driving rod 1621, and in particular, the first transmission block 1626 is sleeved on the first driving rod 1621, and when the first driving rod 1621 rotates, the first transmission block 1626 rotates synchronously with the first driving rod 1621. The first transmission block 1626 is provided with a first extension 1626a extending in a radial direction. The rotation shaft 1623b of the eccentric block 1623a is coupled to the table 12 such that the rotation shaft 1623b of the eccentric block 1623a is capable of swinging only about an eccentric axis 1623c, wherein the eccentric axis 1623c is parallel to the second straight line 102. The first and second eccentric portions 1623d and 1623e are provided on both sides of the rotation shaft 1623b of the eccentric block 1623a, respectively, in a plane in the left-right direction. Wherein, the first eccentric portion 1623d and the second eccentric portion 1623e each extend along a direction perpendicular to the second straight line 102, that is, an included angle between the first eccentric portion 1623d and the second eccentric portion 1623e is greater than 90 ° and less than 180 °. The second eccentric portion 1623e is connected to a flexible connector 1624, and in this embodiment, the flexible connector 1624 is a wire rope. The first eccentric portion 1623d is selectively coupled to the first extension portion 1626a. The first extension 1626a and the eccentric block 1623a change the driving direction of the first driving lever 1621. The flexible connector 1624 is slidably coupled to the table 12 by a plurality of first securing structures 1625, particularly mounted to one side of the first channel 121. One end of the flexible connecting member 1624 is connected to the second eccentric portion 1623e, and the other end is connected to the positioning pin 1632.

When the third state of the first locking mechanism 16, i.e., the operating handle 160 is in the third position, the detent assembly 163 is in the positioned state. Rotation of the first driving lever 1621 causes the first transmission block 1626 to rotate in synchronization with the first driving lever 1621. The first extension 1626a presses down the first eccentric portion 1623d to rotate the eccentric block 1623 a. And the second eccentric portion 1623e rotates upwards, the second eccentric portion 1623e drives the flexible connecting member 1624 to slide backwards, and the flexible connecting member 1624 drives the positioning pin 1632 to move backwards along the direction parallel to the second straight line 102, so that the positioning pin 1632 is separated from the positioning block 1631. At this time, the operation cutting mechanism 13 moves, that is, the operation positioning block 1631 rotates. When the operating cutting mechanism 13 is rotated to a desired angle, the operating handle 160 is moved reversely to the second position, the first extension part 1626a is moved reversely and then does not press the first eccentric part 1623d, the eccentric block 1623a is rotated in a resetting manner, the second eccentric part 1623e is rotated downward, the positioning pin 1632 moves forward along the direction parallel to the second straight line 102, the positioning pin 1632 is connected with the positioning block 1631, and thus the positioning pin 1632 enters into the positioning hole of one of the positioning blocks 1631, and the cutting mechanism 13 can be positioned to the set position by the positioning pin 1632 because the positioning pin 1632 is at least partially connected with the supporting seat 15.

In other embodiments, the positioning hole may be an irregular long hole such as an arc hole, and the two ends of the hole respectively correspond to specific cutting angles, so that the positioning pin 1632 can rotate within a certain setting range, that is, the cutting mechanism 13 can rotate within a certain setting range, and when the positioning pin rotates to the two ends, the positioning hole corresponds to two setting angles respectively, so that an operator can quickly determine the required angle range without going to the rear of the miter saw 100 to confirm the scale.

As shown in fig. 1-2 and 16-24, in addition to the cutting mechanism 13 being rotatable relative to the table 12, the table 12 is also rotatable relative to the base 11 for the purpose of forming bevel cuts in a workpiece. The rotation axis of the table 12 with respect to the base 11 is a bevel axis 103, and in this embodiment, the bevel axis 103 extends in the up-down direction, specifically, the bevel axis 103 is perpendicular to the first straight line 101.

As shown in fig. 16 to 24, the miter saw 100 further includes: a locking mechanism for bevel angle, a positioning mechanism 18 and an operating mechanism 19. The locking mechanism for the chamfer provides a locking force for locking the base 11 and the workbench 12 to rotate relatively, and in this embodiment, the locking mechanism for distinguishing the chamfer is a second locking mechanism 17. A positioning mechanism 18 provides a plurality of preset positions and selectively restrains the table 12 in a selected preset position relative to the base 11. An operating mechanism 19 for holding and operating to rotate the table 12 relative to the base 11. Wherein the operating mechanism 19 includes: the first operating portion 19a drives the second locking mechanism 17 through the first transmission assembly 192 to provide a locking force. The first operation unit 19a includes: a first position corresponding to the relative rotation of the locking base 11 and the table 12 and a second position corresponding to the relative rotation of the release base 11 and the table 12. A second operation unit 19b that is located within a range in which the first operation unit 19a can be operated simultaneously with one hand; the positioning mechanism 18 is driven by the second transmission assembly 194 to release the restriction between the table 12 and the base 11 at the preset position. The second operation unit 19b includes, with respect to the first operation unit 19 a: a third position corresponding to the restriction of the table 12 and the base 11 to the preset position and a fourth position corresponding to the restriction of the table 12 and the base 11 by the release positioning mechanism 18. Wherein, the "single-hand simultaneous operation range" is: when the operator holds and can apply an operation force to the first operation portion 19a or thereafter, the second operation portion 19b reaches and applies an operation force within a range where at least fingers of the same hand can reach. In this way, after the first operation portion 19a and the second operation portion 19b are both disposed within the single-hand operable range, the first operation portion 19a and the second operation portion 19b on the operation mechanism 19 can be touched and operated by one hand holding the operation mechanism 19, and the rotation of the table 12 relative to the base 11 can be controlled by one hand without the need of the other hand, so that the operation is relatively convenient.

In this embodiment, the first operating portion 19a and the second operating portion 19b are connected as a single integral component, but the first operating portion 19a and the second operating portion 19b control the second locking mechanism 17 and the positioning mechanism 18 through two transmission assemblies, the transmission assemblies do not interfere with each other, and the two transmission assemblies independent of each other control the locking and positioning of the rotation of the workbench 12 and the base 11, so that the control is more accurate.

In the present embodiment, the second locking mechanism 17, the positioning mechanism 18, and the operating mechanism 19 also all extend substantially along the length direction of the first passage 121. Specifically, it extends in a direction parallel to the first straight line 101. A majority of the second locking mechanism 17, the positioning mechanism 18, the first drive assembly 192 and the second drive assembly 194 are disposed below the table 12. The first and second operating portions 19a and 19b are connected to the front side 12b2 of the second end 12b of the table, that is, the first and second operating portions 19a and 19b are disposed at the same end as the operating handle with respect to the table 12. In order to facilitate the user's operation, the first and second operating portions 19a and 19b are disposed at different positions on the same end of the operating handle with respect to the table 12.

In the present embodiment, the first operation section 19a includes: the first handle 191, in particular operation, is held by an operator and moves the first handle 191 between a first position and a second position. The second operation unit 19b includes: a second handle 193 is provided on the first handle 191, and in particular operation, the operator grasps the second handle 193 and moves the second handle 193 between the third position and the fourth position. Specifically, the first lever 191 is rotatably connected to the housing at the second end 12b of the table about the third straight line 105. In this embodiment, the third line 105 is perpendicular to or intersects the first line 101. The first knob 191 is generally flat and sized for one-hand gripping by an adult. A third receiving space 191a is formed in the middle of the first knob 191, and a second knob 193 is disposed in the third receiving space 191 a. The second handle 193 rotates about a fourth straight line 106 parallel to the third straight line 105. The second handle 193 is disposed on the palm-opposite side of the first handle 191, and it is understood that the second handle 193 is simultaneously held in the hand of the operator when the operator holds the first handle 191. Therefore, when the first handle 191 is switched between the first position and the second position, the second handle 193 moves together with the first handle 191 due to the fact that it is on the first handle 191. It will also be appreciated that movement of the first handle 191 necessarily moves the second handle 193 together. The second handle 193 is movable relative to the first handle 191, i.e., the second handle 193 is movable about the fourth line 106, such that the second handle 193 is switched between a third position and a fourth position relative to the first handle 191.

As shown in fig. 21, when the first lever 191 is in the second position, the first lever 191 is in the initial position. At this time, the second locking mechanism 17 releases the second position where the base 11 and the table 12 are relatively rotated. The initial position of the second handle 193 is a third position, and in particular, the third position of the second handle 193 relative to the first handle 191 is where the second handle 193 extends beyond the first handle 191, i.e., where the second handle 193 is closer to the operator's hand. The fourth position of the second handle 193 is closer to the first handle 191 than the third position. For the convenience of the operator, the fourth position is that the second handle 193 is flush with the surface of the first handle 191 held by the opposite hand, and the restriction of the relative rotation of the table 12 and the base 11 by the positioning mechanism 18 is released.

When the operator holds the operating mechanism 19, i.e. the first handle 191, the second handle 193 is first switched from the third position to the fourth position. As shown in fig. 22, when the first handle 191 is in the second position and the second handle 193 is in the fourth position, the corresponding second lock mechanism 17 is in a state of releasing the locking force while the positioning mechanism 18 is in a state of releasing the positioning restriction. The operator can rotate the table 12 by the operation mechanism 19 to rotate the table 12 with respect to the base 11. When rotated into position, the table 12 and base 11 further need to be restrained in this position, the operator releases the grip slightly during the gripping action to release the second handle 193 such that the second handle 193 extends beyond the first handle 191, the second handle 193 is in the third position, and the positioning mechanism 18 restrains the table 12 and base 11 in the predetermined position. It will be appreciated that the restraining force provided by the positioning mechanism 18 is insufficient to ensure that no relative movement of the table 12 and base 11 occurs during the cutting operation. When it is desired to lock the relative rotation of the table 12 and the base 11, the first lever 191 is operated to move to the first position, as shown in fig. 23. The second locking mechanism 17 provides a locking force to lock the relative rotation of the table 12 and the base 11. The position in which the second trigger 193 is now located does not affect the second locking mechanism 17 to provide the locking force.

To enable the first handle 191 to remain in the first position, the first operating portion 19a further includes a first limiting structure 1912 formed on or attached to the first handle 191. The first limiting structure 1912 is a cam structure and is disposed behind the first handle rotation shaft 1911. The cam structure can form a dead point D for limiting by utilizing the action of external force when the farthest end of the cam structure moves towards the proximal end, and can convert rotary motion into linear reciprocating motion by utilizing the cam so as to drive the first transmission component 192 to control the second locking mechanism 17. It should be understood that the structure is not limited to the present embodiment, and the specific structure can be understood as a similar embodiment as the present application, as long as the specific structure can realize that the first handle 191 can be moved from the first position to the second position by the external force, and the rotational movement of the first handle 191 is converted into the linear reciprocating movement. Meanwhile, the above two functions may be realized by one component or may be realized by two components respectively.

The first transmission assembly 192 includes a first drive 1921 and a first transmission rod 1922. The first driving portion 1921 may selectively contact the first limiting structure 1912, and the first transmission rod 1922 is connected to the first driving portion 1921. The first driving part 1921 converts the rotational movement of the first handle 191 into the reciprocating movement of the first transmission rod 1922. The first transmission rod 1922 is connected to the second locking mechanism 17, and the first transmission rod 1922 is of a rigid structure and can reciprocate between the first operating portion 19a and the second locking mechanism 17, thereby driving the second locking mechanism 17 to provide a locking force. The first driving portion 1921 is an elastically deformable member, and specifically, the first driving portion 1921 is an elastic sheet body. The first driving part 1921 is installed at the rear side of the first handle 191 in a direction perpendicular to the first straight line 101. The first driving part 1921 is mounted on the table 12, and its mounting point may be used as a reference point for its elastic deformation. When the first lever 191 is switched from the second position to the first position, the cam structure of the first limiting structure 1912 contacts the first driving portion 1921 from the small diameter position to the large diameter position, and the first driving portion 1921 is deformed backward along the first straight line 101 to drive the first transmission rod 1922 to move backward. When the first trigger 191 is in the first position, the most distal end of the cam structure contacts the first driver 1921 and the contact surface is closer to the small diameter surface on the downstream side of the most distal movement. That is, when the first knob 191 is brought into the first position, the contact of the cam structure with the first driving portion 1921 is behind the dead point D of the cam structure, so the first knob 191 is kept in the first position, and the first driving portion 1921 is kept in a state deformed rearward along the first straight line 101, so the second locking mechanism 17 continuously provides the locking force to lock the table 12 and the base 11. When the first lever 191 is switched from the first position to the second position, the cam structure of the first limiting structure 1912 is in contact with the first driving portion 1921 from the large diameter position to the small diameter position, or from contact to non-contact, at this time, the first driving portion 1921 is elastically reset, and the forward reset motion drives the first driving lever 1922 to move forward. The second locking mechanism 17 releases the locking force to lock the table 12 and the base 11, thereby unlocking the rotation of the table 12 and the base 11.

In the present embodiment, the first transmission rod 1922 reciprocates in the direction of the first straight line 101. The first transmission rod 1922 is connected to the table 12, so that the movement of the first transmission rod 1922 in the up-down direction is limited, and the component force of the movement of the first transmission rod 1922 is reduced. In this embodiment, the second locking mechanism 17 is composed of a first transmission rod 1922 and the base 11. When the second locking mechanism 17 needs to provide a locking force, the first transmission rod 1922 abuts against the base 11 along the first straight line 101, and the base 11 is limited by friction force between the first transmission rod and the base 11. In other alternative examples, the second locking mechanism may be formed by two parts connected to the second locking mechanism 17 and to the base 11. Because the second locking mechanism belongs to the prior art, only one of the second locking mechanisms is disclosed in the present embodiment, and the description thereof is omitted.

The second transmission assembly 194 includes a second transmission portion 1941, and the driving force of the second operating portion 19b drives the positioning mechanism 18 to deform through the second transmission portion 1941. The second transmission portion 1941 includes, at least in part, a flexible structure to deform the second transmission portion 1941 under an external force. In this embodiment, the second transmission portion 1941 is a wire rope, or a portion of the second transmission portion 1941 is composed of a wire rope. The use of the flexible structure allows the second transmission portion 1941 to be assembled without restriction when connecting the second operation portion 19b and the positioning mechanism 18. The flexible structure can deform according to the assembly path to reduce the assembly precision requirement. One end of the second transmission portion 1941 is connected to the rear end of the second handle 193. Specifically, one end of the wire rope is fixed after passing through the rear end of the second handle 193. The other end of the second transmission portion 1941 is connected to the positioning mechanism 18.

The positioning mechanism 18 includes an adjustment member 181. The adjusting member 181 has an elastic structure, and the adjusting member 181 is connected to the other end of the second transmission portion 1941, specifically, disposed below the second transmission portion 1941. The first end 181a of the adjusting member is connected to the housing of the table 12 through the second fixing structure 183 so that it can use the connection of the second fixing structure 183 as a reference point for the elastic deformation movement. The second end 181b of the adjusting member is located above the adjusting portion 111 of the base 11, and the adjusting portion 111 is provided with a scale for adjusting the rotation of the table 12 in the horizontal direction. Further, the second end 181b of the adjusting member is provided with a positioning member 182, and the adjusting portion 111 is provided with a plurality of positioning slots 1112, and the plurality of positioning slots 1112 correspond to different rotation angles of the workbench 12 and the cutting mechanism 13. Specifically, the positioning piece 182 protrudes downward, and the shape of the protrusion corresponds to the shape of the positioning groove 1112.

When the second handle 193 is in the third position, as shown in fig. 16-17 and 21, the positioning member 182 is coupled to the positioning groove 1112, or the positioning member 182 contacts the adjusting portion 111 near the positioning groove 1112, and the positioning member 182 is allowed to enter the positioning groove 1112 by continuing to rotate the table 12. When the second handle 193 is in the third position, the adjustment member 181 is not elastically deformed or is elastically deformed but is not deformed enough to move the positioning member 182 out of the positioning groove 1112. As shown in fig. 22, when the second handle 193 is switched from the third position to the fourth position, the second handle 193 rotates about the fourth line 106, and further drives the second transmission portion 1941 to move in a direction away from the base 11. In the present embodiment, the second handle 193 is provided with a cam structure at a position where the second transmission portion 1941 is connected, and thus the rotational movement of the second handle 193 is converted into the linear reciprocating movement of the second transmission portion 1941. The portion of the second transmission portion 1941 connected to the second end of the adjustment member 181 is substantially perpendicular to the second end 181b of the adjustment member and above the second end 181b of the adjustment member, guided by the second fixing structure 183. When the second transmission portion 1941 moves in a direction away from the base 11, a portion of the second transmission portion 1941 connected with the second end of the adjusting member 181 moves upward to drive the second end of the adjusting member 181 to deform upward, the positioning member 182 leaves the positioning groove 1112, the adjusting assembly leaves the base 11, and at this time, the workbench 12 enters a release state and can rotate relative to the base 11. When the operator releases the grip on the second handle 193, the second operation portion 19b is provided with a biasing member for providing a biasing force for returning the second handle 193 from the fourth position to the third position in order to enable the second handle 193 to be automatically returned from the fourth position to the third position. In this embodiment, the biasing element (not shown) is a torsion spring that connects the first and second handles 191, 193. In other alternative embodiments, the biasing element may be omitted and the second trigger 193 driven from the fourth position back to the third position by the resilient return force of the adjustment member 181.

The operating mechanism 19 further includes: a stop assembly 195 for holding the second trigger 193 in the fourth position. It will be appreciated that the limiting function of the positioning mechanism 18 needs to be temporarily canceled at the time of actual operation. At this point, the restraint of the positioning mechanism 18 is maintained released by retaining the second trigger 193 in the fourth position using the restraint assembly 195. The stopper assembly 195 includes a first stopper portion 1951 provided on the second operating portion 19b and a second stopper portion 1952 provided on the first operating portion 19a in cooperation with the first stopper portion 1951. In this embodiment, the first limiting portion 1951 is a groove or a buckle provided on an upper sidewall of the second handle 193, and the second limiting portion 1952 is a groove or a buckle provided on a sidewall of the first handle 191 and engaged with the buckle. When the second handle 193 needs to be kept at the fourth position, the second handle 193 is continuously pressed, and the first stopper 1951 and the second stopper 1952 are engaged with each other to lock the second handle 193. The second handle 193 is now in a fifth position, which is lower than the fourth position. When the limit is to be released, the second handle 193 is reversely moved, the engagement between the first limit portion 1951 and the second limit portion 1952 is released, and the limit is released. In other embodiments, the specific structure of the first limiting portion 1951 and the second limiting portion 1952 is not limited to the snap limiting, so long as the first limiting portion and the second limiting portion can cooperate with each other to limit the relative movement and can be released by an external force.

In order to facilitate the installation of the second transmission portion 1941, when the length of the second transmission portion 1941 is selected, the length of the second transmission portion 1941 for connecting the second handle 193 and the adjusting member 181 is greater than the actual length between the second handle 193 and the adjusting member 181. The length of the second transmission portion 1941 between the second handle 193 and the regulator 181 is regulated by a tension regulator 196 provided at one end of the second transmission portion 1941. It can be appreciated that the tensioning adjustment portion 196 is used to connect the second handle 193 to the adjusting member 181 by adjusting the length of the second transmission portion 1941, so as to adjust the tensioning degree of the second transmission portion 1941, and thus adjust the difficulty level of the second handle 193 driving the positioning mechanism 18. On the other hand, the service life of the second transmission portion 1941 is prolonged. In the present embodiment, the tension adjusting portion 196 is provided on the second grip 193 side. In other alternative embodiments, it may be provided on the adjustment member 181 side. The tension adjusting portion 196 is provided on the first knob 191 and includes a body member 1961 provided with two through holes 1962 and a detachable fastener 1963 provided between the two through holes 1962. The second transmission portion 1941 penetrates one through hole 1962, and penetrates the main body 1961 from the other through hole 1962. The fastener 1963 is screwed into the body 1961 such that the top end presses against the second transmission portion 1941 to secure the second transmission portion 1941 to the body 1961. When adjustment is desired, the fastener 1963 is unscrewed and the fastener 1963 no longer presses against the second transmission portion 1941, thereby adjusting the degree of tension in the second transmission portion 1941.

Fig. 25 to 39 show a miter saw according to a second embodiment of the present application, wherein the same or corresponding parts as those of the first embodiment are designated by the same reference numerals or names as those of the first embodiment. For simplicity, only the points of distinction between the second embodiment and the first embodiment will be described. The miter saw of the present embodiment is different from the first embodiment in the specific structure of the first operating portion 29a and the second operating portion 29 b.

In the present embodiment, the first operation portion 29a includes: the first lever 291 is held by an operator during a particular operation, and the first lever 291 is moved between a first position and a second position. The first lever 291 is rotatably connected to the housing at the second end of the table about the third straight line 205. The first lever 291 is generally flat and sized for one-hand gripping by an adult.

The second operation unit 29b includes: a second lever 293 is disposed on the first lever 291. The second lever 293 reciprocates on the first lever 291 about the fourth straight line 206. The fourth line 206 is perpendicular to the third line 205. Specifically, the fourth straight line 206 extends in the up-down direction. In particular operation, an operator holds the first lever 291 and thumb the second lever 293 for movement between the third and fourth positions. It will be appreciated that when the operator holds the first handle 291, the second handle 293 is simultaneously held in the hand by the operator on the first handle 291. Therefore, when the first lever 291 is switched between the first position and the second position, the second lever 293 is moved together with the first lever 291 because it is provided on the first lever 291. It will also be appreciated that movement of the first lever 291 necessarily moves the second lever 293 together. The second lever 293 is movable relative to the first lever 291, i.e., the second lever 293 is movable about the fourth line 206 such that the second lever 293 is switched between a third position and a fourth position relative to the first lever 291.

The first plate handle 291 forms a third accommodation space 291a at a central portion thereof, and the second transmission portion 1941 penetrates into the third accommodation space 291a. The first lever 291 is provided with a slide groove 2913, and the third accommodation space 291a is communicated with the outside through the slide groove 2913. In the present embodiment, a third transmission portion 2942 is provided between the second lever 293 and the second transmission portion 1941, and the third transmission portion 2942 is at least partially provided in the third accommodation space 291a. Third gear portion 2942 is formed by runner 2913 or is connected to second handle 293, and second gear portion 1941 is connected to third gear portion 2942. Wherein, third transmission portion 2942 is connected to first handle 291 through rotation axis 2943, and third transmission portion 2942 rotates about fourth straight line 206. The second transmission portion 1941 is coupled to an eccentric position 2944 of the third transmission portion 2942. The portion of the second transmission portion 1941 that enters the third accommodation space 291a is connected to the first plate handle 291 by the third fixing structure 2945. The third fixing structure 2945 sets the second transmission portion 1941 to be circular arc with the fourth straight line 206 as a center line. One end of the circular arc shape is connected to the third transmission portion 2942, and the other end thereof protrudes out of the third accommodation space 291a. The chute 2913 is circular arc-shaped, and a third position, a fourth position and a fifth position are sequentially arranged on the chute 2913. In this embodiment, the stop member 295 is a stepped stop surface. A first lever 291 between the third position and the fourth position, which is provided with a boss 2951 in the third accommodation space 291a, the boss 2951 being between the third transmission portion 2942 and the first lever 291. In the fourth to fifth positions, the boss 2951 is omitted, so that this portion forms a groove 2952 with the boss 2951. When the second trigger 293 moves beyond the fourth position to the fifth position, the third transmission portion 2942 enters the groove 2952, i.e., is retained in the groove 2952, and cannot be reset to the fourth position. The operator is required to press the second lever 293 to disengage the third gear 2942 from the groove 2952 and then continue to toggle the second lever 293 to the fourth position to return the second lever 293 to the fourth position. In the present embodiment, the tensioning adjustment portion 296 is provided on the third transmission portion 2942. The specific structure is the same as that of the first embodiment.

As shown in fig. 30 to 31, a miter saw according to a third embodiment of the present application is provided, wherein the same or corresponding parts as those of the embodiment are designated by the same reference numerals or names as those of the embodiment. For simplicity, only the points of distinction between the third embodiment and the second embodiment will be described. The miter saw of the present embodiment is different from the second embodiment in the specific structure of the first handle 391 and the second operation part 39 b.

The first handle 391 is not provided with a chute. The second operation unit 39b includes: a second trigger 393 and a third actuator 3942. Wherein the junction of the second trigger 393 with the third transmission portion 3942 and the rotational axis 3943 of the third transmission portion 3942 coincide. The third transmission portion 3942 is rotatably coupled to the first handle 391 about the fourth straight line 306. The third transmission portion 3942 includes a first stopper portion 3944, a second stopper portion 3912 is connected to the first handle 391, and the second stopper portion 3912 is provided with a convex surface 3912a. The first stopper 3944 slides on the upstream lower surface 3912b of the second stopper 3912 when the second trigger 393 moves from the third position to the fourth position, and the first stopper 3944 passes the convex surface 3912a when the second trigger 393 moves from the fourth position to the fifth position. The second stop 3912 is limited by the first stop 3944 and the second trigger 393 cannot be automatically reset from the fifth position to the fourth position. The operator is required to push the second trigger 393 from the fifth position to the fourth position and the first stop 3944 again slides over the raised surface 3912a into the upstream low surface 3912b to return the second trigger 393 to the fourth position.

As shown in fig. 32 to 34, a miter saw according to a fourth embodiment of the present application is provided, wherein parts identical to or corresponding to those of the embodiments are designated by reference numerals or names corresponding to those of the embodiments. For simplicity, only the points of distinction of the fourth embodiment from the third embodiment will be described. The specific structure of the second operation portion of the miter saw according to the present embodiment is different from that of the third embodiment.

In this embodiment, the second handle 493 is rotatably coupled to the first handle 491 by a spool 4931. The second lever 493 rotates about the fourth straight line 406. The second transmission portion 1941 is wound around the outer periphery of the wire shaft portion 4931, and the second trigger 493 rotates the length of the second transmission portion 1941 around the wire shaft portion 4931 to change, thereby achieving control of the positioning mechanism.

The tension adjusting portion 496 is provided on the wire shaft portion 4931, and includes a main body member 4961 provided with two through holes 4962 and a fastener 4963 provided in the two through holes 4962. The main body member 4961 is sleeved outside the wire shaft portion 4931. The second transmission portion 1941 penetrates through one through hole 4962, and penetrates out of the main body member 4961 through the other through hole 4962. The second transmission portion 1941 is wound into the spool portion 4931 after passing through the tension adjusting portion 496. The fastener 4963 is screwed into the main body member 4961 such that the tip thereof presses against the second transmission portion 1941, thereby fixing the second transmission portion 1941 to the main body member 4961. When adjustment is desired, the fastener 4963 is loosened, and the fastener 4963 no longer presses against the second transmission portion 1941, thereby adjusting the degree of tension of the second transmission portion 1941.

The spacing assembly includes a first spacing portion 4951 and a second spacing portion 4952. The first limiting portion 4951 is a groove provided at the upper bottom of the second handle 493, and the second limiting portion 4952 is a buckle provided on the upper arm of the first handle 491.

As shown in fig. 35 to 36, a miter saw according to a fifth embodiment of the present application is provided, wherein the same or corresponding parts as those of the first embodiment are designated by the same reference numerals or names as those of the first embodiment. For simplicity, only the points of distinction of embodiment five from embodiment one will be described. The miter saw of the present embodiment is different from the first and second operation portions 59a and 59b of the first embodiment in specific structure.

In the present embodiment, the first operating portion 59a includes a first trigger 591, a first limiting structure 5912, and a first connecting portion 592. Wherein the first connection portion 592 is disposed between the first trigger 591 and the first stop structure 5912, the first connection portion 592 may be a separate component connected between the first trigger 591 and the first stop structure 5912. In other alternative embodiments, the first connection 592 is connected with the first trigger 591 or after the first connection 592 is formed as one piece with the first stop structure 5912.

First trigger 591 rotates about third straight line 505. In this embodiment, the third straight line 505 is perpendicular to or intersects the first straight line.

The second operating portion 59b includes a second sleeve 594 and a first lever 595. The second sleeve 594 is sleeved outside the first connecting portion 592, the second sleeve 594 rotates around the fourth straight line 506 as a rotation axis, and the first plate handle 591 is substantially symmetrically arranged around the fourth straight line 506. In the present embodiment, the fourth straight line 506 is perpendicular to the third straight line 505, and the fourth straight line 506 is parallel to the first straight line. It will be appreciated that the thumb or thumb and forefinger can perform a dial operation on the second sleeve 594 while the operator is holding the first trigger 591.

The second transmission portion 1941 is connected to the first lever 595. The first lever 595 is disposed in a direction perpendicular to the fourth straight line 506. The second sleeve 594 is radially provided with a first slot 5941 on an inner side wall thereof, and a width of the first slot 5941 is adapted to a diameter of the first shift lever 595. Specifically, the width of the first slot 5941 is slightly greater than the diameter of the first lever 595, so that the end of the first lever 595 can be inserted into the first slot 5941 to meet the assembly requirements. The first slot 5941 extends along the axis of the second sleeve 594, it being understood that the length of the first slot 5941 is parallel or coincident with the direction of the fourth straight line 506. The first connecting portion 592 is hollow, and the outer wall of the first connecting portion 592 is provided with a second sliding slot 593 for communicating the interior of the first connecting portion 592 with the outside. The portion of the first lever 595 that connects the second transmission portion 1941 is located inside the first connection portion 592. At least one end of the first lever 595 extends from the second sliding slot 593 to the first connection portion 592 and is then inserted into the first slot 5941. The second runner 593 includes a first stop 5931 adjacent the first trigger 591 and a second stop 5932 adjacent the first stop structure 5912. It will be appreciated that the first stop 5931 is located forward of the second stop 5932. When the first shift lever 595 slides to the first stop 5931, the second transmission portion 1941 moves forward, so as to drive the adjusting member to deform. When the first shift lever 595 is slid to the second stop 5932, the second transmission portion 1941 is in a reset or rearward motion and the adjustment member is not deformed. Therefore, when the first lever 595 is in the first stop 5931, the second sleeve 594 corresponds to the fourth position or the fifth position, and when the lever is in the second stop 5932, the second sleeve 594 corresponds to the third position. Since the second sleeve 594 drives the first lever 595 to slide in the second slide groove 593, the first stop 5931 and the second stop 5932 are provided in sequence in the rotational direction of the second sleeve 594. That is, when the second sleeve 594 rotates rightward, the second stop 5932 is disposed rearward and to the right of the first stop 5931. If the second sleeve 594 is rotated leftward, the second stop 5932 is disposed rearward and leftward of the first stop 5931. A transition 5933 is provided between the first stop 5931 and the second stop 5932 to enable the first lever 595 to be smoothly fluctuated by the second sleeve 594. A stop section 5934 is arranged between the first stop 5931 and the transition section 5933, so that the first deflector rod 595 needs to enter the transition section 5933 from the first stop 5931 through the stop section 5934 under the action of external force. Wherein the stop segment 5934 is a straight segment that is substantially parallel to the third straight line 505.

As shown in fig. 37 to 38, a miter saw according to a sixth embodiment of the present application is provided, wherein the same or corresponding parts as those in the fifth embodiment are designated by the same reference numerals or names as those in the fifth embodiment. For simplicity, only the points of distinction of embodiment six from embodiment five will be described. The miter saw of the present embodiment is different from the fifth embodiment in the specific structure of the first operation portion 69a and the second operation portion 69 b.

In the present embodiment, the first operating portion 69a includes a first trigger 691, a first stopper structure (not shown in the drawings), and a first drive ring 692. Wherein the first drive ring 692 is disposed between the first trigger 691 and a first stop feature (not shown). The first handle 691 rotates about a third line 605, wherein the third line 605 is parallel to the first line. One end of the first handle 691 is fixed to the table by a fourth fixing structure 693. The first limiting structure (not shown in the figure) is a threaded structure arranged at the connection part of the fourth fixing structure 693. When the first handle 691 is rotated, the first handle 691 moves back and forth along the third line 605, thereby driving the first transmission rod 1922 to move back and forth.

The second operating portion 69b includes a second sleeve 694 and a first lever 695. A second sleeve 694 is disposed below the first handle 691, the second sleeve 694 rotating about the fourth line 606. The fourth line 606 is disposed parallel to the third line 605.

A first drive ring 692 is provided at the rear end of the first handle 691. The first drive ring 692 rotates about the third straight line 605. The first drive ring 692 has a first external gear 6921 provided thereon. The second sleeve 694 is provided with a second external gear 6942 engaged with the first external gear 6921. In the present embodiment, when the operator holds the first trigger 691, the thumb or thumb and index finger can perform a rotating operation on the first drive ring 692, and the first drive ring 692 drives the second sleeve 694 to rotate by gear transmission.

The second operation portion 69b further includes a second inner tube 696. The second sleeve 694 is sleeved outside the second inner cylinder 696, and after the second inner cylinder 696 partially extends out of the second sleeve 694, the second sleeve 694 is fixed on the workbench through a fifth fixing structure 698. The second transmission portion 1941 is connected to the first lever 695. The first toggle 695 is disposed in a direction perpendicular to the fourth line 606. The second sleeve 694 is provided with a first slot 6941 in a radial direction on an inner side wall, and a width of the first slot 6941 is adapted to a diameter of the first shift lever 695. Specifically, the width of the first slot 6941 is slightly greater than the diameter of the first lever 695, such that the end of the first lever 695 can be inserted into the first slot 6941 to meet the assembly requirements. The first slot 6941 extends along the axis of the second sleeve 694, it being understood that the length of the first slot 6941 is parallel to or coincident with the fourth straight line 606. The second inner cylinder 696 is hollow, and the outer wall of the second inner cylinder 696 is provided with a second chute for communicating the interior of the second inner cylinder 696 with the outside. The portion of the first lever 695 connected to the second transmission portion 1941 is located inside the second inner cylinder 696. At least one end of the first deflector rod 695 extends out of the second inner barrel 696 from the second chute and is embedded into the first slot 6941. The second runner includes a first stop 6971 and a second stop 6972, the first stop 6971 being located before the second stop 6972.

When the first shift lever 695 slides to the first stop position 6971, the second transmission portion 1941 moves forward, so as to drive the adjusting member to deform. When the first lever 695 is slid to the second stop 6972, the second transmission portion 1941 is in a reset or rearward motion and the adjustment member is not deformed. Therefore, when the first lever 695 is in the first stop 6971, the second sleeve 694 corresponds to the fourth position or the fifth position, and when the first lever 695 is in the second stop 6972, the second sleeve 694 corresponds to the third position. Since the second sleeve 694 drives the first lever 695 to slide in the second chute, the first stop 6971 and the second stop 6972 are disposed in sequence along the rotational direction of the second sleeve 694. That is, when the second sleeve 694 rotates rightward, the second stopper 6972 is disposed right rearward of the first stopper 6971. If the second sleeve 694 is rotated leftward, the second stopper 6972 is disposed rearward and leftward of the first stopper 6971. A transition section 6973 is provided between the first stop 6971 and the second stop 6972 to enable the first lever 695 to be smoothly moved by the second sleeve 694. A stop section 6974 is provided between the first stop 6971 and the transition section 6973, such that the lever is required to enter the transition section 6973 from the first stop 6971 through the stop section 6974 under the action of an external force. Wherein the stop segment 6974 is a straight segment that is substantially parallel to the third straight line 605.

As shown in fig. 39 to 40, a miter saw according to a seventh embodiment of the present application is provided, wherein the same or corresponding parts as those of the fifth embodiment are designated by the same reference numerals or names as those of the fifth embodiment. For simplicity, only the points of distinction of embodiment seven from embodiment five will be described. The miter saw of the present embodiment is different from the fifth embodiment in the specific structure of the first and second operating portions 79a and 79 b.

In the present embodiment, the first operating portion 79a includes a first lever 791, a first connecting portion 792, and a second clutch portion 793. The second operating portion 79b includes a second sleeve 794 and a second lever 795. Wherein, the second sleeve 794 is rotatably sleeved outside the first connecting portion 792. The first handle 791 and the second sleeve 794 both rotate about a third straight line 705, wherein the third straight line 705 is parallel to the first straight line. The second lever 795 is disposed in a direction perpendicular to the third straight line 705. The second transmission portion is connected to the second lever 795. A second lever 795 is formed or coupled to the second sleeve 794.

The portion of the first connecting portion 792 extending beyond the second sleeve 794 is connected to the second clutch portion 793. The second clutch portion 793 includes a third clutch member 7931 and a fourth clutch member 7932. The third clutch 7931 is selectively connected to the first transmission rod, and the fourth clutch 7932 is connected to the first connection portion 792. Wherein the fourth clutch 7932 is limited by the table for rotational movement about the third straight line 705, allowing reciprocation along the third straight line 705. The third clutch 7931 rotates in synchronization with the first connection 792 through the pin 796 and is restricted from reciprocating along the third straight line 705.

The third clutch member 7931 and the fourth clutch member 7932 have a surface which is engaged with each other, and the surface of the third clutch member 7931 facing the fourth clutch member 7932 is provided with stepped steps which are sequentially increased in the direction of the third straight line 705 to a certain height to form a cross section. The surface of the fourth clutch 7932 facing the third clutch 7931 also has a shape that engages the third clutch 7931.

When the first handle 791 rotates about the third straight line 705, that is, from the second position to the first position, the first handle 791 drives the third clutch member 7931 to rotate about the third straight line 705, the inter-engagement surface between the fourth clutch member 7932 and the third clutch member 7931 changes, and the third clutch member 7931 pushes the fourth clutch member 7932 to move backward along the direction of the third straight line 705, so as to push the first transmission rod to abut against the base, and the second locking mechanism locks the rotation between the workbench and the base.

When the second sleeve 794 rotates about the third straight line 705, the second lever 795 also rotates about the third straight line 705, and the second transmission portion moves along the direction of the third straight line 705, thereby driving the adjusting member to deform.

As shown in fig. 41, a miter saw according to an eighth embodiment of the present application is provided, wherein the same or corresponding parts as those in the seventh embodiment are designated by the same reference numerals or names as those in the seventh embodiment. For simplicity, only the points of distinction of embodiment eight from embodiment seven will be described. The miter saw of this embodiment differs from the seventh embodiment in the second drive assembly 894, etc.

In this embodiment, the second transmission assembly 894 includes a flap 8942 and a second transmission portion (not shown). Wherein, the first end 8942a of the turning plate is connected with the second deflector 895, the second end 8942b of the turning plate is connected with a second transmission part (not shown in the figure), and the second transmission part (not shown in the figure) is connected to the adjusting member 181. The first end 8942a of the turning plate and the second end 8942b of the turning plate are connected with the workbench through a turning plate rotating shaft 8942 c. The axis 809 of flap rotation axis 8942c is perpendicular to third straight line 805. The flap 8942 swings about an axis 809 of the flap rotation shaft 8942c as a rotation shaft. It will be appreciated that when the first end 8942a of the flap and the second end 8942b of the flap 8942 are moved in opposite directions perpendicular to the third line 805. That is, as first end 8942a of flap moves downward, second end 8942b of flap 8942 moves upward. In this embodiment, flap 8942 is located below second sleeve 894 and second lever 895 extends at least partially downward against flap 8942. When the second sleeve 896 is in the third position, the flap 8942 does not drive the adjustment member to deform and the adjustment member remains in contact with the base. It will be appreciated that the first end 8942a of the flap is now higher than the second end 8942b of the flap or the first end 8942a of the flap is flush with the second end 8942b of the flap or the first end 8942a of the flap is slightly lower than the second end 8942b of the flap. When the second sleeve 896 continues to rotate to the fourth position, the second lever 895 moves toward the first end of the flap 8942, the second lever 895 pushes the first end 8942a of the flap, the first end 8942a of the flap moves downward, and the second end 8942b of the flap moves upward, driving the second transmission portion (not shown) upward to deform the adjusting member.

The foregoing has outlined and described the basic principles, main features and advantages of the present application. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the present application in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the present application.

Claims

1. A miter saw, comprising:

a base;

the workbench is used for placing a workpiece and rotates relative to the base by taking the beveling axis as an axis;

the cutting mechanism is used for completing the cutting operation of the workpiece;

the locking mechanism provides a locking force for locking the base and the workbench to rotate relatively;

a positioning mechanism providing a plurality of preset positions and selectively limiting the workbench to the selected preset positions relative to the base;

characterized by further comprising:

an operating mechanism for holding and operating to rotate the workbench relative to the base; the operating mechanism includes:

a first operating part for driving the locking mechanism through a first transmission assembly to provide the locking force; the first operation unit includes: a first position corresponding to the relative rotation of the locking base and the workbench and a second position corresponding to the relative rotation of the releasing base and the workbench;

A second operation unit which is located within a range in which the first operation unit can be operated simultaneously with one hand; the positioning mechanism is driven by the second transmission assembly to release the limit between the workbench and the base at a preset position; the second operation portion includes, with respect to the first operation portion: and correspondingly limiting the workbench and the base to a third position at a preset position and correspondingly releasing a fourth position at which the positioning mechanism limits the workbench and the base.

2. The miter saw of claim 1, wherein the second transmission assembly includes a second transmission portion, the driving force of the second operation portion drives the positioning mechanism to deform through the second transmission portion, and the second transmission portion includes at least a part of a flexible structure to deform the second transmission portion under an external force.

3. The miter saw of claim 2, wherein said flexible structure includes a wire rope.

4. A miter saw according to claim 2, wherein one end of the second transmission portion is wound on the second operation portion, and the other end is connected to the positioning mechanism, and the length of the second transmission portion is longer than the distance between the second operation portion and the positioning mechanism.

5. The miter saw of claim 4, wherein said second drive assembly further includes a tension adjustment portion disposed at an end of said second drive portion adjacent said second operating portion for adjusting a length of said second drive portion between said second operating portion and said positioning mechanism.

6. The miter saw of claim 1, wherein said first operating section includes:

a first trigger for operation and movement between said first position and said second position;

and the first limiting structure is formed on or connected with the first trigger and used for keeping the first trigger in the first position.

7. The miter saw of claim 6, wherein said second operating section includes:

a second trigger disposed on said first trigger for operation and movement between said third position and said fourth position;

a biasing element provides a biasing force that returns the second trigger from the fourth position to the third position.

8. The miter saw of claim 7, wherein the operating mechanism further includes:

a stop assembly to retain the second trigger in the fourth position; the limiting assembly comprises a first limiting part arranged on the second operating part and a second limiting part matched with the first limiting part and arranged on the first operating part.

9. The miter saw of claim 1, wherein said first drive assembly includes:

the first transmission rod is connected with the locking mechanism, and the first transmission part is of a rigid structure and can reciprocate between the first operation part and the locking mechanism;

and a second driving part disposed between the first operating part and the first transmission rod, the second driving part converting the reciprocating motion of the first operating part into the reciprocating motion of the first transmission rod.

10. The miter saw of claim 1, further comprising:

the supporting seat is connected with the cutting mechanism and the workbench; the supporting seat is arranged at the first end of the workbench; the operating mechanism is connected to the workbench and at least partially arranged at the second end of the workbench.