CN211727713U

CN211727713U - Cutting tool

Info

Publication number: CN211727713U
Application number: CN201922245129.XU
Authority: CN
Inventors: 沃伦·布朗; 哈利·索默; 格雷厄姆·格哈德
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Machinery Zhangjiagang Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-10-23
Anticipated expiration: 2029-12-13

Abstract

The invention relates to a cutting tool, which comprises a working head, a motor, a shell, a bottom plate and a roller device arranged on the bottom plate, wherein the roller device comprises at least two guide rollers capable of rolling on a workpiece, all the guide rollers are arranged on the same rotating shaft and are fixed relative to the rotating shaft, the whole cutting tool can stably roll and advance on the workpiece along a cutting direction when the workpiece is cut, so that the operation is more labor-saving, and the rollers cannot relatively independently rotate and are restricted with each other, so that the guide precision is improved, and the accurate cutting can be effectively realized.

Description

Cutting tool

Technical Field

The utility model relates to a cutting tool, especially an electric circular saw with roller device on the bottom plate.

Background

One of the most commonly used cutting tools for electric circular saws mainly includes a saw blade, a motor, a bottom plate handle, and the like. When a workpiece is cut, a bottom plate of the electric circular saw is usually abutted against the workpiece, and a user pushes the circular saw forwards to finish cutting, so that the friction force between the bottom plate and the workpiece is overcome all the time in the use process, an operator is easy to fatigue, and slipping is possibly caused if force is improperly applied to deviate the cutting direction. In view of the above problem, patent CN201808104U discloses a guiding device for circular saw, which is provided with a roller on a bottom plate for guiding, but since the roller is a cylindrical roller, the contact area with the workpiece is relatively large, which affects the guiding effect, and the rollers are relatively independent, which also affects the guiding precision.

Therefore, there is a need for a new roller guide device to solve the above problems.

Disclosure of Invention

For overcoming the defects of the prior art, the utility model aims to solve the problem that a cutting tool with a roller device on a bottom plate is provided, which ensures the guiding effect and the guiding precision when the structure is compact and simple.

In order to solve the above problem, the technical scheme of the utility model is that: a cutting tool, characterized in that the cutting tool comprises: the working head is used for cutting the workpiece; the motor drives the cutting accessory to work; a housing including a motor case accommodating a motor and a grip portion; a base plate abutting against the workpiece; the roller device comprises a rotating shaft rotating relative to the bottom plate and at least two guide rollers arranged on the rotating shaft, and the guide rollers and the rotating shaft are relatively fixed;

preferably, the axis of the rotating shaft is perpendicular to the cutting direction of the cutting tool.

Preferably, the outer circumferential surface of the guide roller is provided with anti-skid ribs which are uniformly distributed.

Preferably, the extending direction of the anti-slip ribs is parallel to the axial direction of the rotating shaft.

Preferably, the guide rollers are distributed perpendicular to the cutting direction on both sides of the projection of the center of gravity of the tool on the base plate.

Preferably, the bottom plate is provided with a slot, and the guide roller passes through the slot to roll on the workpiece.

Preferably, the slot is at a forward end of the base plate in the cutting direction.

Preferably, a support member is fixedly connected to the base plate, and the rotating shaft is rotatably supported above the base plate by the support member.

Preferably, the support member is detachable with respect to the base plate.

Preferably, the roller device comprises at least two guide rollers, and all the guide rollers are arranged on the same rotating shaft.

Preferably, the protruding amount of the guide roller under the bottom plate is 0.5mm to 1 mm.

Preferably, the outer surface of the guide roller is made of rubber.

Preferably, the outer surface of the guide roller is a frosted surface.

The utility model discloses a cutting tool establishes roller device on the bottom plate, wherein roller device is including can be on the work piece rolling guide roller, whole cutting tool can roll along the cutting direction on the work piece steadily and advance when cutting the work piece, the direction of advance that rolls is cutting direction promptly, can realize the cutting direction, a plurality of guide rollers install on same rotation axis and relative rotation axis is fixed, guarantee synchronous motion between each gyro wheel, restrict each other, improve the direction precision, phenomenons such as line can not appear running, can effectively realize accurate direction.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

Fig. 1 is a perspective view of the electric circular saw of the present invention.

Fig. 2 is an enlarged view of a roller assembly of the electric circular saw shown in fig. 1.

Fig. 3 is a perspective view of the electric circular saw shown in fig. 1 at another angle.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the present embodiment, the technical solution of the present invention is explained by taking an electric circular saw as an example, but the tool of the present invention is not limited to the electric circular saw, and may be other cutting tools with a bottom plate, such as a jig saw.

In order to facilitate understanding of the present application, in this specification, a vertical upward direction when the reader faces fig. 1 is referred to as an upper side of the electric circular saw 100, and a vertical downward direction is referred to as a lower side of the electric circular saw 100.

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 application, and do not limit the directions of the electric circular saw of the embodiments of the present application in other scenarios, including but not limited to use, test, transportation, and manufacture, which may cause the components to be inverted in orientation or changed in position.

As shown in fig. 1 to 3, the electric circular saw 100 includes a saw blade 1 for cutting a workpiece, a motor (not shown) for driving the saw blade to operate, a base plate 3 abutting against the workpiece 2, a housing 4 fixed opposite to the base plate, and a roller assembly 5 mounted on the base plate.

Wherein the housing includes a guard 41 covering the saw blade, a motor case 43 housing the motor, and a grip portion 45 for gripping. The bottom plate is provided with a cutting groove 31, and the saw blade 1 penetrates through the cutting groove 31 to cut the workpiece 2. The workpiece 2 is marked with a cutting line 21, the saw blade 1 is aligned with the cutting line 21, and the electric circular saw 100 is advanced along the cutting line 21 to cut the workpiece 2, wherein the direction indicated by the arrow "a" is the cutting direction of the electric circular saw 100.

The roller device 5 is provided on the base plate 3, and the roller device 5 mainly includes a support 51 provided on the base plate 3, a rotation shaft 53 mounted on the support, and a guide roller 55 mounted on the rotation shaft 53 and rotating about an axis "B" of the rotation shaft 53. The guide roller 55 protrudes from below the base plate 3 and rolls on the workpiece 2. Therefore, in the process of cutting the workpiece, when the electric circular saw 100 moves relative to the workpiece 2, the guide roller 55 rolls on the workpiece 2 and advances, the direction in which the guide roller 55 rolls and advances is the cutting direction "a" of the electric circular saw, and the linear cutting guide effect is realized, so that the linear cutting is more accurate, and the operation is more labor-saving.

As shown in fig. 2, the roller device 5 includes at least two guide rollers 55, and because there are a plurality of guide rollers, the contact area between each guide roller and the workpiece is small, and the friction force is large, so that the side slip is not easy to occur, and meanwhile, the plurality of guide rollers are restricted with each other, thereby ensuring accurate guidance. All the guide rollers 55 are mounted on the same rotating shaft 53, and the rotating shaft 53 is provided on the base plate 3 in a direction perpendicular to the cutting direction "a", so that the forward rolling direction of the guide rollers 55 can be parallel to the cutting direction, thereby achieving cutting guide. All the guide rollers 55 are fixed relative to the rotating shaft 53 and rotate together with the rotating shaft 53, so that the respective guide rollers 55 cannot rotate relatively independently, and the precision of cutting guide can be further improved. Preferably, the rotating shaft 53 is a polygonal prism, such as a hexagonal prism, and the center of the guide roller 55 has a through hole configured therewith, so that when the rotating shaft 53 passes through the guide roller, relative fixation can be achieved through configuration, no extra fixing structure is needed, the structure is simple, and the cost is low.

The two ends of the rotating shaft 53 are rotatably supported by the supporting members 51, the supporting members 51 are fixed on the bottom plate 3 and are detachable relative to the bottom plate 3, and can be fixed by screws or other detachable methods, and when the roller device 5 is not needed, the supporting members 51 can be directly detached from the bottom plate 3. The rotating shaft 53 can be supported above the bottom plate 3 through the supporting piece 51, and as the rotating shaft 53 passes through the center of the guide roller 55, more space can be provided for the guide roller 55 as the rotating shaft 53 is higher within a layout allowable range, so that the protruding amount of the guide roller 55 below the bottom plate 3 is smaller, the stability of the tool is better maintained, and the side turning is avoided.

As shown in fig. 2, a plurality of anti-slip ribs 551 are uniformly distributed on the outer peripheral surface of the guide roller 55, the extending direction of the anti-slip ribs 551 is perpendicular to the cutting direction "a", in the cutting process, when the guide roller 55 rolls on the workpiece 2, the contact area between the guide roller 55 and the workpiece 2 is reduced by the structure of the anti-slip ribs 551, and the direction of the anti-slip ribs 551 is perpendicular to the cutting direction, so that the friction force perpendicular to the cutting direction between the guide roller 55 and the workpiece 2 is increased, the electric circular saw 100 is not easy to sideslip, and is easy to move along the cutting direction, and has better guiding capability.

As shown in fig. 1 and 2, a projection of a tool center of gravity "G" (not shown) on the base plate 3 falls on an imaginary line "C", wherein the imaginary line "C" is parallel to the cutting direction "a", and the guide rollers 55 are distributed on both sides of the imaginary line "B", so that support and guide can be achieved on both sides of the tool center of gravity, stabilizing the tool center of gravity, making the operation more convenient, and preventing a situation in which the cutting guide is not accurate due to the base plate 3 being tilted, preferably, the guide rollers 55 are symmetrically distributed on both sides of the imaginary line "C", and distributed at the edge of the base plate 3.

As shown in fig. 2, in the present embodiment, the number of the guide rollers 55 is 7. The base plate 3 is also provided with slots 33 for the passage of the guide rollers 55, preferably the number of the slots 33 corresponds to the number of the guide rollers 55, and the guide rollers 55 are in contact with the workpiece 2 through the slots 33 and roll on the workpiece 2 about the axis "B" of the rotary shaft 53. Preferably, the slot 33 is arranged at the front end of the base plate 3 in the cutting direction, where the front end of the base plate 3 refers in particular to the part of the base plate 3 which is located in front of the saw blade 1 in the cutting direction. This arrangement makes full use of the excess space at the front end of the base plate 3, does not affect the structure of other components, and has a more compact layout. And guide roller 55 is located the place ahead of saw bit 1, realizes the guide backward cutting, prevents to appear beginning to cut the inaccurate condition.

As shown in fig. 3, the guide roller 55 protrudes from the bottom plate 3 to contact the workpiece 2, and the specific protruding amount is preferably 0.5mm to 1mm, and by reasonably setting the radius of the guide roller 55 and the height of the rotating shaft 53, the protruding amount of the guide roller 55 below the bottom plate 3 can be controlled to be 0.5mm to 1mm, so that the supporting and guiding effects of the guide roller 55 can be ensured, and the influence on the accuracy of the cutting depth due to the excessively large distance between the bottom plate 3 and the workpiece 2 can be prevented, and the electric circular saw 100 is not easy to turn on one side and is convenient to control.

The outer surface of the guide roller 55 is made of rubber, so that the friction force between the guide roller 55 and the workpiece 2 is increased, the electric circular saw 100 is not easy to sideslip, and the guide precision is improved

In another embodiment, the outer surface of the guide roller 55 may be a frosted surface, so as to increase the friction between the guide roller 55 and the workpiece 2, so that the electric circular saw 100 is not easy to sideslip, and the guiding precision is improved.

The present invention is not limited to the embodiments of the foregoing embodiments, and other modifications may be made by those skilled in the art in light of the teachings of the present invention, and the present invention is not limited to the embodiments described above, and all such modifications are intended to be included within the scope of the present invention as long as the functions implemented by the present invention are the same or similar to the present invention.

Claims

1. A cutting tool, characterized in that the cutting tool comprises:

the working head is used for cutting the workpiece;

the motor drives the cutting workpiece to work;

a housing including a motor case accommodating a motor and a grip portion;

a base plate abutting against the workpiece;

the roller device comprises a rotating shaft rotating relative to the bottom plate and at least two guide rollers arranged on the rotating shaft, and the guide rollers and the rotating shaft are relatively fixed.

2. The cutting tool of claim 1, wherein: the axis of the rotating shaft is perpendicular to the cutting direction of the cutting tool.

3. The cutting tool of claim 1, wherein: the outer peripheral surface of the guide roller is provided with anti-skidding convex ribs which are uniformly distributed.

4. The cutting tool of claim 3, wherein: the extending direction of the anti-slip convex ribs is parallel to the axial direction of the rotating shaft.

5. The cutting tool of claim 1, wherein: the guide rollers are distributed on two sides of the projection of the gravity center of the tool on the bottom plate perpendicular to the cutting direction.

6. The cutting tool of claim 1, wherein: the bottom plate is provided with a slot, and the guide roller passes through the slot to roll on the workpiece.

7. The cutting tool of claim 6, wherein: the slot is at a front end of the base plate along a cutting direction.

8. The cutting tool of claim 1, wherein: the bottom plate is fixedly connected with a support part, and the rotating shaft is rotatably supported above the bottom plate through the support part.

9. The cutting tool of claim 8, wherein: the protruding amount of the guide roller below the bottom plate is 0.5mm to 1 mm.

10. The cutting tool of claim 1, wherein: the outer surface of the guide roller is made of rubber.