CN113967948A

CN113967948A - Oblique cutting saw

Info

Publication number: CN113967948A
Application number: CN202010724093.8A
Authority: CN
Inventors: 格雷厄姆·格哈德
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2022-01-25

Abstract

The application discloses oblique fracture saw includes: a base; a table supported on the base, the table having a working surface for supporting a workpiece; the supporting mechanism is connected with the workbench; the cutting assembly is rotatably connected with the supporting mechanism and comprises a motor for driving a saw blade to rotate; the support mechanism is configured as a linkage mechanism operable to move the cutting assembly in a cutting direction. The utility model provides a mitre saw can be convenient for promote the compact structure nature of mitre saw, improves the portability of mitre saw.

Description

Oblique cutting saw

Technical Field

The application relates to the field of electric tools, in particular to a miter saw.

Background

The oblique cutting saw is used as a cutting tool, has a wide application range, can be used for cutting a plurality of metal or non-metal materials, and is quick and convenient to cut. A miter saw generally includes a base, a table on the base, a support coupled to the table, a blade connected to the support for cutting a workpiece, and a motor for driving the blade. When the cutting device is used, a workpiece to be cut is placed on the workbench, then the saw blade is pressed downwards, and the saw blade descends to cut the workpiece to be cut, so that the purpose of cutting the workpiece to be cut is achieved. However, the conventional miter saw is relatively large in size, poor in portability, and not favorable for movement and storage.

Disclosure of Invention

In view of the above-mentioned shortcomings, it is an object of the present application to provide a miter saw, so as to improve the compactness of the miter saw and improve the portability of the miter saw.

In order to achieve the purpose, the technical scheme is as follows:

a miter saw, comprising:

a base;

a table supported on the base, the table having a working surface for supporting a workpiece;

the supporting mechanism is connected with the workbench;

the cutting assembly is rotatably connected with the supporting mechanism and comprises a motor for driving a saw blade to rotate;

wherein the support mechanism is configured as a linkage mechanism operable to move the cutting assembly in a cutting direction.

In a preferred embodiment, the linkage is a parallelogram linkage.

As a preferred embodiment, the link mechanism includes: a first link, a second link, a third link, and a fourth link; the first connecting rod is fixedly arranged on the workbench, and the fourth connecting rod is rotatably connected with the cutting assembly; the second connecting rod and the third connecting rod are hinged between the first connecting rod and the fourth connecting rod.

In a preferred embodiment, the saw blade has a blade axis of rotation; the linkage mechanism is provided with a plurality of hinge points; the axis of rotation of the hinge point is parallel to the axis of rotation of the saw blade.

In a preferred embodiment, the second link is disposed away from the table with respect to the third link; the lower end of the second connecting rod is hinged with the first connecting rod to form a first hinge point; the lower end of the third connecting rod is hinged with the first connecting rod to form a second hinge point; the upper end of the second connecting rod is hinged with the fourth connecting rod to form a third hinge joint point; the upper end of the third connecting rod is hinged with the fourth connecting rod to form a fourth hinge point; the cutting assembly and the fourth link have a fifth hinge point; a distance between the first hinge point and the second hinge point is smaller than a distance between the first hinge point and the third hinge point.

In a preferred embodiment, the fourth link is a triangular link plate; the third hinge point, the fourth hinge point and the fifth hinge point are respectively located at the top point of the triangular connecting plate.

In a preferred embodiment, the second link passes through at least one turn as it extends from the first hinge point to the third hinge point; the turning part protrudes towards one side far away from the workbench.

As a preferred embodiment, the link mechanism is further provided with a through hole corresponding to the cutting groove on the workbench; the through hole is higher than the workbench.

In a preferred embodiment, the through holes are provided in the second link and the third link.

In a preferred embodiment, the distance between the last point of the linkage and the foremost point of the saw blade is 2-3 times the diameter of the saw blade when the linkage is located at the position farthest away from the work table.

Has the advantages that:

the oblique fracture saw that provides in this application embodiment removes through the cutting that utilizes link mechanism to realize cutting assembly, simple structure, and then is convenient for promote the compact structure nature of oblique fracture saw, improves the portable property of oblique fracture saw.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic view of a miter saw according to an embodiment of the present application;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is another perspective view of FIG. 1;

FIG. 4 is a schematic view of the linkage mechanism of FIG. 1 in a front dead center position;

FIG. 5 is a schematic illustration of the path followed by the linkage of FIG. 4 to a rear dead center position;

FIG. 6 is a schematic view of a motion trajectory of a linkage mechanism of a miter saw provided in accordance with another embodiment of the present application;

fig. 7 to 10 are schematic views illustrating a process of cutting the workpiece by the miter saw of fig. 1.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The miter saw according to an embodiment of the present invention will be explained and explained with reference to fig. 1 to 10. It should be noted that, for convenience of description, like reference numerals denote like parts in the embodiments of the present invention. And for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments, and the descriptions of the same components may be mutually referred to and cited.

Specifically, the upward direction illustrated in fig. 1 to 10 is defined as "up", the downward direction illustrated in fig. 1 to 10 is defined as "down", and the cutting direction is the forward-backward movement direction, the arrow direction in fig. 9 is the front-to-rear direction, that is, "right" is "front" and "left" is "rear" when facing fig. 9. It should be noted that the definitions of the directions in the present specification are only for convenience of describing the technical solution of the present invention, and do not limit the directions of the miter saw of the embodiment of the present invention in other scenarios, including but not limited to use, test, transportation, and manufacturing, which may cause the orientation of the device to be reversed or the position of the device to be changed.

Please refer to fig. 1 to 10. One embodiment of the present application provides a miter saw, comprising: a base 300; a table 500 supported on the base 300, the table 500 being provided with a work surface supporting a workpiece 400; a support mechanism connected to the table 500; a cutting assembly 100 rotatably coupled to the support mechanism. The cutting assembly 100 includes a motor 105 for driving rotation of the blade 101. Wherein the supporting mechanism is configured as a linkage mechanism 200, and the linkage mechanism 200 is operable to move the cutting assembly 100 in a cutting direction.

The oblique cutting saw provided in the embodiment of the application realizes the cutting movement of the cutting assembly 100 by utilizing the link mechanism 200, has a simple structure, is convenient to improve the structural compactness of the oblique cutting saw, and improves the portability of the oblique cutting saw.

In this embodiment, the cutting assembly 100 has a saw blade 101; the table 500 is provided with a cutting groove 502 into which the saw blade 101 extends. The linkage mechanism 200 is operable to move the cutting assembly 100 in a cutting direction. The cutting assembly 100 is rotatably coupled to the linkage mechanism 200 to operatively adjust the height of the cutting assembly 100 relative to the table 500 and to follow the linkage mechanism 200 back and forth.

In the present embodiment, a saw blade 101 is used to cut a workpiece 400, the saw blade 101 being generally a circular saw blade 101. The cutting assembly 100 is also provided with a drive mechanism for rotating the saw blade 101, which typically includes a motor 105. The motor 105 has an output shaft for rotating the saw blade 101. A handle is fixed to the motor to facilitate the operation, and the work table 500 has a work plane on which the workpiece 400 is placed. The working plane is provided with a cutting groove 502 for the saw blade 101 to pass through, the size of the cutting groove 502 is larger than the maximum thickness of the saw blade 101, and the saw blade 101 can cut the workpiece 400 through the cutting groove 502 when cutting downwards. The work table 500 is provided with an abutting plate 501 for restricting the movement of the work 400, and the abutting plate 501 is generally symmetrically arranged on the work plane 31. As shown in fig. 7 to 10, when cutting the workpiece 400, the link mechanism 200 drives the cutting assembly 100 to move toward the abutting plate 501 in a manner of partially extending into the cutting groove 502, i.e., to move backward.

The saw blade 101 has a blade rotational axis M. The extension of the blade rotation axis M is perpendicular to the cutting direction or the extension of the cutting slot 502. Facing fig. 2, the blade rotational axis M is perpendicular to the plane of the paper. The linkage mechanism 200 has a plurality of hinge points so that the linkage mechanism 200 can convert it into a position change of the cutting assembly 100 through movement. Wherein the rotation axis of the hinge point is parallel to the rotation axis M of the saw blade. Of course, in the state shown in fig. 1, the overall extension direction of the abutment plate 501 may also be parallel to the blade rotation axis M.

To achieve smooth and controllable movement of the cutting assembly 100, the central position of the linkage mechanism 200 along the direction of the rotation axis M is aligned with the cutting groove 502 along the extending direction or cutting direction of the cutting groove 502. Preferably, the linkage mechanism 200 may have a mirror-image structure with respect to the plane in which the cutting slot 502 is located.

In the present embodiment, the link mechanism 200 is configured as a four-link mechanism. As shown in fig. 2, when the link mechanism 200 is located at the position farthest from the table 500 or the cutting groove 502, the distance L between the rearmost point of the link mechanism 200 and the foremost point of the saw blade 101 is 2 to 3 times the diameter of the saw blade 101. The last position point of the link mechanism 200 is the leftmost position point of the link mechanism 200, and the foremost position point of the saw blade 101 is the rightmost position point of the saw blade 101. Of course, the spacing relationship is not limited to the position of the blade 101 shown in FIG. 2, and the blade 101 may continue to rotate up or down, both in the spacing relationship.

Specifically, the four-bar linkage 200 is a parallelogram linkage 200. The link mechanism 200 includes: a first link 201, a second link 202, a third link 203, and a fourth link 204 fixedly disposed on the base 300. The second link 202 and the third link 203 are hinged between the first link 201 and the fourth link 204; the cutting assembly 100 is rotatably coupled to the fourth link 204. The second link 202 is located at the outermost side, and by pushing and pulling the second link 202, the back and forth movement in the cutting direction can be achieved.

The second link 202 is far away from the work table 500 relative to the third link 203; the lower end of the second connecting rod 202 is hinged with the first connecting rod 201 to form a first hinge point 205; the lower end of the third link 203 is hinged with the first link 201 to form a second hinge point 206; the upper end of the second connecting rod 202 is hinged to the fourth connecting rod 204 to form a third hinge point 207; the upper end of the third link 203 is hinged to the fourth link 204 to form a fourth hinge point 208.

Wherein a distance between the first hinge point 205 and the second hinge point 206 is equal to a distance between the third hinge point 207 and the fourth hinge point 208. The distance between the first hinge point 205 and the third hinge point 207 is equal to the distance between the second hinge point 206 and the fourth hinge point 208. The distance between the first hinge point 205 and the second hinge point 206 is smaller than the distance between the first hinge point 205 and the third hinge point 207. The distance between the first hinge point 205 and the second hinge point 206 is smaller than the distance between the first hinge point 205 and the third hinge point 207.

The cutting assembly 100 and the fourth link 204 have a fifth hinge point 104. As shown in fig. 1 to 10, in the present embodiment, the fifth hinge point 104 is located above the fourth hinge point 208. Further, the fifth hinge point 104 and the fourth hinge point 208 are respectively aligned in a direction perpendicular to the table 500 (generally, a vertical direction), that is, the fifth hinge point 104 is located right above the fourth hinge point 208. For convenience of understanding, the left fifth hinge point 104 is located right above the left fourth hinge point 208 when facing fig. 3, and the right fifth hinge point 104 is located right above the right fourth hinge point 208. Specifically, the fourth link 204 is a triangular link plate. The third hinge point 207, the fourth hinge point 208, and the fifth hinge point 104 are respectively located at the vertex of the triangular connecting plate.

In addition, in one possible embodiment, the fifth hinge point 104 and the fourth hinge point 208 share the same pivot axis, and both can rotate independently of each other. At this time, the coupling end of the cutting assembly 100 is also rotatably coupled to the fourth hinge point 208. Therefore, the structure of the fourth connecting rod 204 can be simplified, and the manufacturing cost can be reduced.

In this embodiment, the hinge points of the first hinge point 205, the second hinge point 206, the third hinge point 207 and the fourth hinge point 208 are all movably connected, so that the user can manually adjust the placing position or the cutting position (including the initial cutting position) of the cutting assembly 100 up and down or back and forth as desired when cutting is needed. Of course, the cutting assembly 100 may be gravity-loaded onto the table when not in use.

As shown in fig. 4 and 5, the link mechanism 200 of the present embodiment moves in the cutting direction during cutting, the travel path of the fifth hinge point 104 is an arc track 160, and during pulling the link mechanism 200 backwards during cutting, the cutting assembly 100 and the fourth link 204 of the link mechanism 200 are in accordance with each other, that is, the travel path of the cutting assembly 100 is an arc track 150. During the cutting process, no relative rotation occurs between the cutting assembly 100 and the fourth link 204. This is because the cutting assembly 100 can interfere with the fourth link 204 in the cutting state to form a dead point position of the fifth hinge point 104, so that it can follow the same track as the fourth link 204 during the cutting process.

In another possible embodiment, as shown in fig. 6, to avoid the blade 101 from rolling up and down, which affects the cutting quality, there is a rotation between the cutting assembly 100 and the fourth link 204 during the cutting process. By virtue of the fifth hinge point 104, during the backward pulling process of the link mechanism 200, the cutting assembly 100 can be adjusted by rotation, so that the saw blade 101 is moved like a translation, and the moving track 150' of the saw blade 101 and the saw blade rotation axis M can be a straight line, thereby ensuring the cutting quality.

In order to prevent sundries such as sawdust generated by cutting from being accumulated on the workbench 500, the link mechanism 200 is further provided with a through hole 210 corresponding to the cutting groove 502; the through-hole 210 is higher than the work table 500. Specifically, the through hole 210 is disposed on the second link 202 and the third link 203. In the present embodiment, the second link 202 and the third link 203 are identical in structure as a whole, and are similar to an H shape or an i shape. The upper end and the lower end of the second link 202 are located on both sides of the third link 203 and the first link 201 and are hinged by a pivot shaft. The second link 202 passes through at least one turn 220 as it extends from the first hinge point 205 to the third hinge point 207. The turning part 220 is protruded toward a side away from the work table 500.

The cutting process of the miter saw of the present embodiment to cut the workpiece 400 is described in detail below with reference to fig. 7 to 10 in order to better understand the present invention.

As shown in fig. 7, a user may manually lift the saw blade 101 by grasping a handle on the cutting assembly 100, and then place the workpiece 400 on the work surface of the table 500 and position the workpiece against the plate 501. The blade is then lowered according to the arrow shown in fig. 7 to the state shown in fig. 8, bringing the blade 101 into abutment with the desired position of the side edge of the workpiece 400. Then, the saw blade 101 is pulled backward by the link mechanism 200, and the rotating saw blade 101 cuts the workpiece 400 until the state shown in fig. 9 is formed, and the workpiece 400 is cut. Finally, the cutting assembly 100 is lifted upward to remove the workpiece 400 to complete the cutting.

Any numerical value recited herein includes all values from the lower value to the upper value, in increments of one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed subject matter.

Claims

1. A miter saw, comprising:

a base;

the supporting mechanism is connected with the workbench;

2. The miter saw of claim 1, wherein said linkage is a parallelogram linkage.

3. The miter saw of claim 1, wherein said linkage mechanism comprises: a first link, a second link, a third link, and a fourth link; the first connecting rod is fixedly arranged on the workbench, and the fourth connecting rod is rotatably connected with the cutting assembly; the second connecting rod and the third connecting rod are hinged between the first connecting rod and the fourth connecting rod.

4. The miter saw of claim 3, wherein said saw blade has a blade axis of rotation; the linkage mechanism is provided with a plurality of hinge points; the axis of rotation of the hinge point is parallel to the axis of rotation of the saw blade.

5. The miter saw of claim 3, wherein said second link is disposed away from said table relative to said third link; the lower end of the second connecting rod is hinged with the first connecting rod to form a first hinge point; the lower end of the third connecting rod is hinged with the first connecting rod to form a second hinge point; the upper end of the second connecting rod is hinged with the fourth connecting rod to form a third hinge joint point; the upper end of the third connecting rod is hinged with the fourth connecting rod to form a fourth hinge point; the cutting assembly and the fourth link have a fifth hinge point; a distance between the first hinge point and the second hinge point is smaller than a distance between the first hinge point and the third hinge point.

6. The miter saw of claim 5, wherein said second link passes through at least one corner as it extends from said first hinge point to said third hinge point; the turning part protrudes towards one side far away from the workbench.

7. A miter saw as in claim 3, wherein said linkage is further provided with through holes corresponding to cutting grooves on said table; the through hole is higher than the workbench.

8. The miter saw of claim 7, wherein said through holes are provided in said second link and said third link.

9. The miter saw of claim 1, wherein a distance between a rearmost point of said linkage mechanism and a forwardmost point of said saw blade when said linkage mechanism is located farthest from said table is 2-3 times a diameter of the saw blade.