CN111085873B

CN111085873B - Miter saw

Info

Publication number: CN111085873B
Application number: CN201811234883.7A
Authority: CN
Inventors: 姜小波; 宋红兵
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2018-10-23
Filing date: 2018-10-23
Publication date: 2022-11-15
Anticipated expiration: 2038-10-23
Also published as: CN111085873A

Abstract

The invention discloses a miter saw, and belongs to the technical field of cutting devices. The miter saw comprises a base, a workbench, a locking mechanism, a positioning mechanism and an operating piece, wherein the positioning portion is arranged on the base along the circumferential direction, the workbench is rotatably arranged on the base, the locking mechanism and the positioning mechanism are slidably arranged on an extending portion and can move along the extending direction of the extending portion under the driving of the operating piece respectively, so that the workbench can be switched among a locking state, a positioning state and a releasing state, when the workbench is in the locking state, the locking mechanism abuts against the side wall of the base, when the workbench is in the positioning state, the locking mechanism releases the base, the positioning mechanism is positioned on one of the positioning portions, and when the workbench is in the releasing state, the locking mechanism and the positioning mechanism both release the base. The miter saw provided by the invention has the advantages of simple structure and convenience in operation.

Description

Miter saw

Technical Field

The invention relates to the technical field of cutting devices, in particular to a miter saw.

Background

A miter saw is a commonly used power tool for cutting metal, wood, plastic and fiber boards at an angle to an object to be cut. Generally, a table of a miter saw is mounted on a base, a cutting angle is adjusted by rotating a turntable of the table, and the table is locked after the angle is determined.

The locking mechanism of the existing miter saw is complex in structure and difficult to operate, and the existing miter saw needs two hands to operate in multiple steps.

Disclosure of Invention

The invention aims to provide a miter saw with a workbench which is simple in locking structure and convenient to operate.

In order to achieve the purpose, the invention adopts the following technical scheme:

a miter saw, comprising:

the base is provided with at least one positioning part along the circumferential direction;

the workbench is rotatably arranged on the base and comprises a turntable and an extension part which extends outwards along the radial direction of the turntable;

the locking mechanism and the positioning mechanism are slidably arranged on the extending portion and can move along the extending direction of the extending portion respectively so that the workbench can be switched among a locking state, a positioning state and a releasing state, when the workbench is in the locking state, the locking mechanism abuts against the side wall of the base, when the workbench is in the positioning state, the locking mechanism releases the base, the positioning mechanism is positioned on one positioning portion, and when the workbench is in the releasing state, the locking mechanism and the positioning mechanism both release the base; and

and the operating piece is rotatably arranged on the extending part and can respectively drive the locking mechanism and the positioning mechanism to move along the extending direction of the extending part.

Furthermore, the locking mechanism comprises a first elastic piece and a locking rod arranged on the extending portion in a sliding mode, two ends of the locking rod are respectively a locking end used for being abutted to the base and a driving end used for being driven by the operating piece, and the first elastic piece is used for providing force far away from the base for the locking rod along the extending direction of the extending portion.

Further, the driving end of the locking rod is in threaded connection with a bolt or a nut, and the length of the threaded connection part of the bolt or the nut and the locking rod is adjustable.

Furthermore, a first elastic sheet is arranged on the end face of one side, close to the operating part, of the bolt or the nut.

Furthermore, a cam surface is arranged on one side of the operating piece close to the locking mechanism, and the operating piece drives the locking rod to move along the extending direction of the extending part through the cam surface when rotating.

Furthermore, the positioning mechanism comprises a second elastic piece and a positioning rod arranged on the extending portion in a sliding mode, two ends of the positioning rod are respectively a positioning end and a driving end used for being driven by the operating piece, and the second elastic piece is used for providing elastic force close to the base for the positioning rod along the extending direction of the extending portion.

Furthermore, two fork plates are oppositely arranged at the bottom of the operating part, the positioning rod penetrates between the two fork plates, a transmission pin penetrates through the driving end of the positioning rod, the bottom ends of the fork plates are parabolic, and the bottom ends of the fork plates are used for providing force for the positioning mechanism to separate from the positioning part through the transmission pin when the workbench is in a release state.

Furthermore, the positioning mechanism further comprises an elastic positioning part arranged on the workbench, a transmission part rotatably arranged on the extension part, and a pushing part arranged at the positioning end of the positioning rod, wherein the elastic positioning part, the transmission part and the pushing part are sequentially overlapped from top to bottom, and the pushing part is used for enabling the elastic positioning part to be matched with or lifted out of the positioning part through the transmission part in the movement process of the pushing part.

Furthermore, the base is provided with an angle scale, and the workbench is provided with a pointer for indicating the scale.

Furthermore, the positioning part is a positioning groove arranged on the base, and the positioning mechanism comprises an elastic clamping protrusion which is matched and positioned with the positioning groove.

The invention has the following beneficial effects:

the miter saw provided by the invention can respectively drive the positioning mechanism and the locking mechanism to move through the operating piece, so that the switching of the locking, positioning and releasing states of the workbench is realized, the structure is simple, and the operation is simple and convenient; when the working table is rotated to a specific angle, the positioning mechanism and the positioning part are matched in advance to realize a quick positioning function, so that the working table is accurately locked; the workbench can be released, so that the workbench can be locked after rotating at any angle relative to the base, and the use is more flexible; and the locking mechanism is locked by abutting against the outer wall of the base, so that the structure is simple and reliable.

Drawings

FIG. 1 is an exploded view of a miter saw provided in accordance with an embodiment of the present invention in a set position;

FIG. 2 is a partial schematic view of the miter saw provided in accordance with embodiments of the present invention in a set position;

FIG. 3 is a cross-sectional view of a miter saw provided in accordance with an embodiment of the present invention in a locked position;

FIG. 4 is a cross-sectional view of the miter saw provided in accordance with an embodiment of the present invention in a released state;

FIG. 5 is one of the schematic structural views of a locking mechanism and a positioning mechanism provided in accordance with an embodiment of the present invention;

FIG. 6 is a second schematic structural view of a locking mechanism and a positioning mechanism provided in accordance with an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an operating member and a positioning rod according to an embodiment of the present invention.

Reference numerals are as follows:

100. a base; 200. a table 300, a locking mechanism; 400. a positioning mechanism; 500. an operating member;

110. a main body; 120. a boss; 111. a positioning groove; 112. calibration;

210. a turntable; 220. an extension portion; 211. a pointer; 221. a rotating shaft;

310. a locking lever; 320. a first elastic member; 330. a bolt; 340. a first spring plate; 311. a locking end; 312. a drive end of the locking lever;

410. positioning a rod; 420. a second elastic member; 430. a second mounting bracket; 440. a drive pin; 450. elastic clamping protrusions; 460. a transmission member; 470. a pusher member; 480. an abutting member; 11. a positioning end, 412, a driving end of the positioning rod; 431. a first guide passage; 432. a first guide channel; 461. a bump;

510. a cam surface; 520. a fork plate; 521. a first end; 522. a second end.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Embodiments of the present invention provide a miter saw, as shown in fig. 1 and 2, including a base 100, a table 200, a locking mechanism 300, a positioning mechanism 400, and an operating member 500. As shown in fig. 2, the base 100 preferably includes a main body 110 and a boss 120 provided on the main body 110, the boss 120 preferably has an arc shape, a central angle corresponding to the arc-shaped boss 120 is set according to a rotation range of the table 200, and an outer periphery of the main body 110 extends radially beyond an outer periphery of the boss 120. The base 100 is provided with a plurality of (a plurality of at least two) positioning portions along a circumferential direction, the positioning portions are provided on the main body 110, the positioning portions are preferably, but not limited to, positioning grooves 111, and the positioning grooves 111 are preferably formed by inwardly recessing a top portion and a side portion of the main body 110. The number and distribution of the positioning portions may be set according to the general angle and the adjustment precision of the workbench 200, and preferably, a plurality of positioning portions are uniformly arranged along the circumferential direction, for example, one positioning portion is arranged at intervals of 0.5 degrees, 1 degree, 2 degrees, 5 degrees, 10 degrees or 15 degrees. The worktable 200 is rotatably installed on the base 100, and specifically, the worktable 200 is rotatably installed on the base 100 through an axis perpendicularly penetrating the middle of the base 100 and the worktable 200. The work table 200 includes a turntable 210 and an extension 220 formed to extend outward in a radial direction of the turntable 210 (an arrow a in fig. 1 indicates an extending direction of the extension 220), and a sawing unit (not shown) is provided at one side of the turntable 210. The operating member 500 is rotatably disposed on the extending portion 220, and specifically, the operating member 500 is rotatably disposed on an end of the extending portion 220 away from the turntable 210 via a rotating shaft 221 perpendicular to the extending direction of the extending portion 220. The locking mechanism 300 and the positioning mechanism 400 are slidably disposed on the extension portion 220, and the operating member 500 is capable of driving the locking mechanism 300 and the positioning mechanism 400 to move along the extending direction of the extension portion 220 (understandably, the extending direction of the extension portion 220 is consistent with the radial direction of the turntable 210) respectively so as to switch the working table 200 among the locking state, the positioning state and the releasing state.

As shown in fig. 3, when the table 200 is in the locked state, the locking mechanism 300 abuts against the side wall of the base 100 so that the table 200 cannot rotate relative to the base 100, specifically, when the table 200 is in the locked state, the locking mechanism 300 abuts against the side wall of the boss 120. As shown in fig. 1 and 2, when the table 200 is in the positioning state, the locking mechanism 300 releases the base 100, and the end of the positioning mechanism 400 is positioned on one of the positioning portions, thereby determining the relative position of the table 200 and the base 100 in the circumferential direction; as shown in fig. 4, when the table 200 is in the release state, the locking mechanism 300 and the positioning mechanism 400 both release the base 100, so that the table 200 can be locked after being rotated by any angle relative to the base 100.

The miter saw provided by the embodiment can respectively drive the positioning mechanism 400 and the locking mechanism 300 to move through the operating piece 500, so that the switching of the locking, positioning and releasing states of the workbench 200 is realized, the structure is simple, and the operation is simple and convenient; when the surface of the workbench 200 is rotated to a specific angle, the positioning mechanism 400 is matched with the positioning part in advance to realize a quick positioning function, so that the workbench 200 is locked accurately; the workbench 200 can be released, so that the workbench 200 can be locked after rotating at any angle relative to the base 100, and the use is more flexible; the locking mechanism 300 is locked by abutting against the outer wall of the base 100, and the structure is simple and reliable.

In order to accurately adjust the rotation angle of the table 200 and improve the processing accuracy of the miter saw, as shown in fig. 1 and 2, a scale 112 for the angle may be provided on the base 100, and a pointer 211 for indicating the scale 112 may be provided on the table 200, and the reference numeral 211 in fig. 1 indicates only the position of the pointer 211 schematically, and does not show the specific structure of the pointer 211. Specifically, the scale 112 is provided on the body 110 of the base 100.

As shown in fig. 2 to 6, the locking mechanism 300 includes a first elastic member 320 and a locking bar 310 slidably disposed on the extension portion 220, and the locking bar 310 is preferably a straight bar disposed along the extension direction of the extension portion 220. The two ends of the lock lever 310 are respectively a locking end 311 for abutting against the base 100 and a driving end 312 for being driven by the operating member 500, and the first elastic member 320 is used for providing a force to the lock lever 310 away from the base 100 along the extending direction of the extending portion 220. The first elastic member 320 is preferably, but not limited to, a spring. The installation manner of the locking mechanism 300 is not limited, and it is sufficient to ensure that the locking mechanism can move on the extension portion 220 along a predetermined direction to lock or release the workbench 200, for example, a first mounting bracket is provided on the extension portion 220, and the locking rod 310 is arranged on the first mounting bracket in a penetrating manner.

As shown in fig. 5 and 6, the driving end 312 of the locking bar 310 is threadedly connected with a bolt 330, and the bolt 330 is screwed into the locking bar 310 with an adjustable length. Because one end of the locking rod 310 is connected with the bolt 330, on one hand, the whole length of the locking mechanism 300 can be adjusted through the bolt 330, thereby reducing the processing precision of the length of the locking rod 310 and reducing the production cost; on the other hand, the locking force of the locking mechanism 300 can be adjusted by adjusting the screwed length of the bolt 330. In other embodiments, the bolt 330 may be replaced by a nut, that is, the driving end 312 of the locking rod 310 is screwed with the nut, and the length of the locking rod 310 screwed into the nut is adjustable.

The operating member 500 is used to drive the locking mechanism 300 to move in the extending direction of the extending portion 220, and specifically, the operating member 500 is used to make the locking lever 310 overcome the elastic force of the first elastic member 320 so that the locking lever 310 abuts against the sidewall of the boss 120 at least when the workbench 200 is in the locking state. With reference to fig. 2 to 6, in order to simplify the driving structure and manner between the operating element 500 and the locking mechanism 300, a cam surface 510 is disposed on a side of the operating element 500 close to the locking mechanism 300, and when the operating element 500 rotates, the cam surface 510 contacts the locking mechanism 300 and drives the locking mechanism 300 to move along the extending direction of the extending portion 220. Specifically, the cam surface 510 contacts the drive end 312 of the lock lever 310. The cam surface 510 may be provided on the operating element 500 itself, or may be provided on a cam connected to the operating element 500. As shown in fig. 3, when the operating member 500 is pressed downward clockwise, the cam surface 510 presses the lock lever 310 and moves the lock lever 310 in a direction approaching the base 100 against the elastic force of the first elastic member 320 until the locking end 311 thereof abuts the base 100 to lock the table 200. As shown in fig. 2 to 6, in order to prevent the bolt 330 from wearing the cam surface 510 and reducing the locking force, a first elastic sheet 340 is disposed on an end surface of the bolt 330 on a side close to the operating member 500. The surface of the first resilient piece 340 is preferably smooth.

The structure of the positioning mechanism 400 is not particularly limited, and it can cooperate with the positioning portion on the base 100 to perform the function of pre-positioning the table 200. With reference to fig. 2 to fig. 6, the positioning mechanism 400 of the present embodiment includes a second elastic member 420 and a positioning rod 410 slidably disposed on the extending portion 220, the positioning rod 410 is located below the locking rod 310, two ends of the positioning rod 410 are a positioning end 411 and a driving end 412 for being driven by the operating member 500, respectively, and the second elastic member 420 is used for providing an elastic force for the positioning rod 410 to approach the base 100 along the extending direction of the extending portion 220. The second elastic member 420 is preferably, but not limited to, a spring. The second positioning member is preferably disposed over the positioning rod 410. The positioning mechanism 400 is mounted in an unlimited manner, and it is sufficient to ensure that it can move on the extension part 220 along a predetermined direction to be positioned or separated from the positioning part, for example, a second mounting rack 430 is provided below the extension part 220, the second mounting rack 430 is preferably but not limited to be fixedly connected to the extension part 220 by screws, and the positioning mechanism 400 is at least partially accommodated between the extension part 220 and the second mounting rack 430. The second mounting bracket 430 is provided with a first guide channel 431 through which the positioning rod 410 passes. The positioning rod 410 may be provided with an abutting member 480, the second elastic member 420 is located between the abutting member 480 and the second mounting bracket 430, and when the workbench 200 is in the release state, the second elastic member 420 is compressed between the abutting member 480 and the second mounting bracket 430. In addition, in order to make the structure simpler, the second mounting bracket 430 is preferably, but not limited to, the same bracket as the first mounting bracket, and a second guide passage 432 through which the locking bar 310 passes is provided at the top end of the second mounting bracket 430.

For simple structure, the operating member 500 drives the positioning mechanism 400 to move as follows: as shown in fig. 6 and 7, two fork plates 520 are oppositely disposed at the bottom of the operating member 500, the two fork plates 520 are symmetrically disposed with respect to the axis of the positioning rod 410, the positioning rod 410 is inserted between the two fork plates 520, a driving pin 440 is inserted into the driving end 412 of the positioning rod 410, the driving pin 440 is preferably disposed perpendicular to the positioning rod 410, the bottom ends of the fork plates 520 are parabolic, and the bottom ends of the fork plates 520 are used for providing a force for disengaging from the positioning portion to the positioning mechanism 400 through the driving pin 440 when the workbench 200 is in the release state. Specifically, the paraboloid includes a first end 521 and a second end 522 in a direction away from the base 100, and the distance between the paraboloid and the rotating shaft 221 decreases when the paraboloid extends from the first end 521 to the second end 522. When the operating member 500 is rotated counterclockwise as shown in FIG. 4 until the operating member 500 is tilted upward, the driving pin 440 is engaged with the first end 521 of the paraboloid.

As shown in fig. 2 to 6, the positioning mechanism 400 further includes an elastic positioning element disposed on the working platform 200, a transmission element 460 rotatably disposed on the extending portion 220, and a pushing element 470 disposed at the positioning end 411 of the positioning rod 410, wherein the elastic positioning element is preferably an elastic clamping protrusion 450, the transmission element 460 is rotatably disposed on the extending portion 220 via a shaft perpendicular to the positioning rod, the elastic positioning element, the transmission element 460 and the pushing element 470 are sequentially overlapped in a top-to-bottom direction (the words indicating the directions up and down are relative to the miter saw in the normal use state shown in fig. 1), and the pushing element 470 is used for engaging or being lifted out of the positioning portion by the transmission element 460 during the movement thereof. The structure of the elastic clamping projection 450 is not limited, in this embodiment, the elastic clamping projection 450 includes a fork-shaped main body and a projection disposed on the bottom surface of the fork-shaped main body, two fork pieces at one end of the main body are respectively connected with the workbench 200, the other end of the main body is used for being matched with the transmission member 460, and the projection is used for being matched with the positioning groove 111. Specifically, at least one of the pusher member 470 and the transmission member 460 engages the other by a ramp that slopes downwardly in a direction away from the base 100. In this embodiment, the pushing member 470 has a slope, and the transmission member 460 has a protrusion 461 capable of sliding along the slope. As shown in fig. 1 and 2, when the working table 200 is in the positioning state, the positioning rod 410 and the pushing member 470 are moved in a direction approaching the base 100 by the second elastic member 420, and the elastic catching protrusion 450 is fitted in the positioning groove 111 to enable the positioning of the working table 200 with respect to the base 100. As shown in fig. 4, when the workbench 200 is in the releasing state, the operating element 500 drives the positioning rod 410 and the pushing member 470 to move away from the base 100, the pushing member 470 pushes the transmission member 460 to rotate upward, and the transmission member 460 lifts the elastic clamping protrusion 450 out of the positioning groove 111, so that the elastic clamping protrusion 450 is disengaged from the positioning groove 111 to release the workbench 200.

The method of using the miter saw according to the present embodiment will be briefly described below with reference to fig. 2 to 4:

fig. 2 shows the working platform 200 in the positioning state, in which the operating member 500 is in the substantially horizontal state, the locking end 311 of the locking lever 310 releases the base 100, and the elastic protrusion 450 is engaged in one of the positioning grooves 111.

When the worktable 200 is required to be adjusted from the positioning state to the locking state, as shown in fig. 3, the operating member 500 is rotated downward to a predetermined angle, the lock lever 310 is pressed by the cam surface 510 to move in a direction approaching the base 100 against the elastic force of the first elastic member 320, and the lock lever 310 finally abuts against the side wall surface of the base 100 to lock the worktable 200. In this process, the positioning mechanism 400 maintains its elastic catching protrusion 450 in a positioning state of being fitted in the positioning groove 111 by the second elastic member 420.

When the angle of the table 200 needs to be adjusted, as shown in fig. 4, the table 200 needs to be adjusted to the release state first. When the operating member 500 is rotated upward to a predetermined angle, the locking lever 310 is moved away from the base 100 by the first elastic member 320 to release the base 100; meanwhile, the operating member 500 drives the positioning rod 410 and the pushing member 470 to move away from the base 100 by overcoming the elastic force of the second elastic member 420 through the paraboloid at the bottom of the operating member, the transmission member 460 rotates upwards when the pushing member 470 moves away from the base 100, and the transmission member 460 lifts the elastic locking protrusion 450 out of the positioning groove 111, so that the elastic locking protrusion 450 is disengaged from the positioning groove 111 to release the workbench 200. After the workbench 200 is in the release state, the workbench 200 can be rotated to the next common angle, the elastic clamping projection 450 is clamped into the lower positioning groove 111 to enable the workbench 200 to be in the positioning state, and then the workbench 200 is adjusted to the locking state through the locking mechanism 300; it is also possible to rotate the table 200 to an angle of non-use, in which the elastic catching projection 450 is in a position staggered from the positioning groove 111, and then adjust the table 200 to a locked state by the locking mechanism 300.

The miter saw work table 200 provided by the present embodiment has a simple locking structure, and can be operated with only one hand, which is convenient to use.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be taken in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, and these embodiments will fall within the scope of the present invention.

Claims

1. A miter saw, comprising:

the locking mechanism and the positioning mechanism are slidably arranged on the extending portion and can move along the extending direction of the extending portion respectively so that the workbench can be switched among a locking state, a positioning state and a releasing state, when the workbench is in the locking state, the locking mechanism abuts against the side wall of the base, when the workbench is in the positioning state, the locking mechanism releases the base, the positioning mechanism is positioned on one positioning portion, and when the workbench is in the releasing state, the locking mechanism and the positioning mechanism both release the base; the positioning part is a positioning groove arranged on the base, and the positioning mechanism comprises an elastic clamping protrusion which is matched with the positioning groove for positioning; the positioning mechanism also comprises an elastic positioning piece arranged on the workbench and a transmission piece rotationally arranged on the extension part, and the elastic positioning piece is matched with or lifted out of the positioning part through the transmission piece; and the operating piece is rotatably arranged on the extension part and can respectively drive the locking mechanism and the positioning mechanism to move along the extension direction of the extension part.

2. The miter saw of claim 1, wherein the locking mechanism includes a first elastic member and a locking lever slidably disposed on the extension portion, two ends of the locking lever are respectively a locking end for abutting against the base and a driving end for being driven by the operating member, and the first elastic member is configured to provide a force to the locking lever away from the base in an extension direction of the extension portion.

3. The miter saw of claim 2, wherein the drive end of the lock lever is threadedly connected with a bolt or a nut, and the length of the threaded connection of the bolt or the nut and the lock lever is adjustable.

4. The miter saw of claim 3, wherein a first resilient piece is provided on an end surface of one side of the bolt or the nut adjacent to the operation member.

5. The miter saw of any of claims 2 to 4, wherein a cam surface is provided on a side of the operating member adjacent to the lock mechanism, and the operating member drives the lock lever in an extending direction of the extension portion by the cam surface when rotated.

6. The miter saw according to any of claims 2 to 4, wherein the positioning mechanism includes a second elastic member and a positioning lever slidably provided on the extension portion, both ends of the positioning lever are a positioning end and a driving end for being driven by the operating member, respectively, and the second elastic member is configured to provide an elastic force to the positioning lever in a direction in which the extension portion extends, the elastic force being close to the base.

7. The miter saw as claimed in claim 6, wherein two fork plates are oppositely disposed at the bottom of the operating member, the positioning rod is inserted between the two fork plates, a driving pin is inserted into a driving end of the positioning rod, bottom ends of the fork plates are parabolic, and the bottom ends of the fork plates are used for providing a force for the positioning mechanism to separate from the positioning portion through the driving pin when the table is in a release state.

8. The miter saw as claimed in claim 6, wherein the positioning mechanism further includes a pushing member disposed at a positioning end of the positioning rod, and the elastic positioning member, the transmission member, and the pushing member are overlapped in sequence from top to bottom.

9. The miter saw of any of claims 1 to 4, wherein the base is provided with an angled scale, and the table is provided with a pointer for indicating the scale.