CN211054122U

CN211054122U - Handheld cutting machine

Info

Publication number: CN211054122U
Application number: CN201921942686.0U
Authority: CN
Inventors: 姜永; 施伟; 刘娟华
Original assignee: Shanghai Jingshuo Construction Development Co ltd
Current assignee: Shanghai Jingshuo Construction Development Co ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-07-21
Anticipated expiration: 2029-11-06

Abstract

The utility model discloses a hand-held cutting machine, which comprises a machine case, a protective cover, a handle and a cutting blade, wherein a motor is arranged in the machine case, and a motor output shaft penetrates out of the machine case and penetrates into the protective cover; the end part of the motor output shaft is provided with an installation part, and the installation part comprises a fixed seat fixed on the motor output shaft, a positioning column fixed on the fixed seat and an installation seat; the surface of the cutting blade is provided with at least two positioning holes, the surface of the mounting seat close to the cutting blade is provided with at least two mounting holes aligned with the positioning holes, and one end of each positioning column, far away from the fixing seat, penetrates through the positioning holes and penetrates into the mounting holes; and the mounting seat is provided with a fastening bolt, the fastening bolt penetrates through the mounting seat and penetrates into the positioning column, and the fastening bolt is in threaded connection with the positioning column. The utility model discloses has following effect: this hand-held type cutting machine's blade makes things convenient for the dismouting for this cutting machine can change suitable blade according to the service environment of difference, and application scope is big.

Description

Handheld cutting machine

Technical Field

The utility model relates to a cutting machine field, in particular to handheld cutting machine.

Background

Hand-held cutting machines, also known as stone cutters, marble machines, are machines that can be used to cut stone, tile, wood, etc. materials. In the practical use of the cutting machine, in order to realize safe, high-quality and efficient operation, different types of saw blades are selected according to workpieces to form different cutting modes. For example, when cutting hard and brittle materials, a blade type saw blade is often selected, so that a smooth cutting surface and high cutting precision can be obtained, and accumulated chips can be conveniently removed by adopting a segment type saw blade.

At present, chinese utility model patent with bulletin number CN204148622U discloses a hand-held type cutting machine, include quick-witted case and install in the handle of quick-witted case one end, the machine case is just being equipped with first spout to handle one side, the handle is just being equipped with a slider to first spout end, a draw-in groove has been seted up to the centre of first spout, a rear end fixed connection spring of slider, the other end and the handle fixed connection of spring, a handle internally mounted battery, handle are located quick-witted incasement portion and are equipped with first metal contact, an installation motor in the machine case, the motor is just being equipped with the second metal contact to first metal contact lower extreme, and the battery is connected with first metal contact through a power cord. The utility model has simple structure, and realizes the conductive work by connecting the handle with the first metal contact piece and the second metal contact piece between the case; the outer side of the case is provided with a protective cover, a cutting blade is arranged at the lower end of the protective cover and connected with a motor shaft of the motor, two supporting legs are arranged inside the lower end of the case, the upper ends of the supporting legs are arranged in a cavity at the lower end of the case, the upper ends of the supporting legs are connected with the inside of the case through a pin shaft, a torsion spring is sleeved outside the pin shaft, and two ends of the torsion spring are clamped on two clamping blocks in the cavity respectively.

Above-mentioned technical scheme utilizes two supporting legss when using, alleviates the working strength of both hands, nevertheless has following defect: however, the cutting blade of the hand-held cutting machine is directly connected to the motor shaft of the motor, so that it is difficult for an operator to replace the cutting blade, which limits the applicable range of the hand-held cutting machine.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a not enough to prior art exists, the utility model aims at providing a handheld cutting machine, the blade of this handheld cutting machine makes things convenient for the dismouting for suitable blade can be changed according to the service environment of difference to this cutting machine, and application scope is big.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a handheld cutting machine comprises a case, a protective cover fixed on the case, a handle fixed on the case and a cutting blade arranged in the protective cover, wherein a motor is arranged in the case, and an output shaft of the motor penetrates out of the case and into the protective cover; the end part of the motor output shaft is provided with an installation part for installing the cutting blade, the installation part comprises a fixed seat fixed on the motor output shaft, a positioning column fixed on the fixed seat and an installation seat, and the installation seat and the fixed seat are respectively arranged on two sides of the cutting blade; the surface of the cutting blade is provided with at least two positioning holes, the surface of the mounting seat close to the cutting blade is provided with at least two mounting holes aligned with the positioning holes, and one end of each positioning column, far away from the fixing seat, penetrates through the positioning holes and penetrates into the mounting holes; and a fastening bolt is arranged on the mounting seat, penetrates through the mounting seat and penetrates into the positioning column, and is in threaded connection with the positioning column.

Through adopting the above technical scheme, when fastening bolt screwed, the mount pad supports tightly with cutting blade, thereby make cutting blade press from both sides tightly between mount pad and fixing base, furthermore, the reference column passes cutting blade's locating hole, cutting blade has been restricted for the rotation of fixing base, thereby effectively fixed cutting blade, and when operating personnel unscrewed fastening bolt, the mount pad can separate with cutting blade, at this moment, operating personnel takes off cutting blade from the reference column and can accomplish cutting blade's dismantlement, operating personnel dismouting cutting blade has been made things convenient for, make this cutting machine can change suitable cutting blade according to the service environment of difference, application scope is big.

The utility model is further arranged in that a counter bore is arranged on the side wall of the mounting seat far away from the cutting blade, the counter bore is communicated with the mounting hole, and the fastening bolt passes through the counter bore and is in threaded connection with the positioning column; the head of the fastening bolt is arranged in the countersunk hole.

Through adopting above-mentioned technical scheme, the countersunk head bolt head sets up in the countersunk hole, prevents that countersunk head bolt outstanding mount pad and with safety cover inside wall wearing and tearing.

The utility model discloses further set up to, the fixing base is close to cutting blade's surface with the mount pad is close to cutting blade's the equal chromium plating in surface handles.

Through adopting above-mentioned technical scheme, reduced the wearing and tearing between fixing base and mount pad and the cutting blade to play and reduce the condition that uses back installation accuracy to reduce for a long time.

The utility model discloses further set up to, the safety cover include with fixed half cover of quick-witted case fixed and with fixed half cover of activity of connecting fixedly can be dismantled to fixed half cover.

Through adopting above-mentioned technical scheme, the safety cover divide into fixed half cover and can dismantle half cover of activity of being connected with fixed half cover for operating personnel can open the safety cover when dismouting cutting blade, has made things convenient for operating personnel's operation.

The utility model discloses further set up to, fixed half cover a side edge the activity is partly covered articulatedly, fixed half cover another side edge is equipped with construction bolt, the construction bolt tip passes in proper order the activity half cover and fixed half cover, just construction bolt with fixed half cover threaded connection.

By adopting the technical scheme, the operator unscrews the mounting bolt and rotates the movable half cover to complete the opening of the protective cover, and the operation is convenient.

The utility model discloses further set up to, activity half cover is close to the rotation groove has been seted up on the surface of mount pad, it is fixed with rolling bearing to rotate the inslot, rolling bearing internal fixation has a briquetting, top briquetting with the mount pad is kept away from cutting blade's lateral wall laminating and offset.

Through adopting above-mentioned technical scheme, the top pressure piece offsets with the surface that cutting blade was kept away from to the mount pad for the mount pad receives spacingly on cutting blade's axis of rotation direction, has promoted the security, and when cutting blade rotated, the mount pad rotated along with cutting blade's pivoted, thereby reduced the wearing and tearing between top pressure piece and the mount pad.

The utility model discloses further set up to, the top briquetting with the surface chromium plating that the mount pad is close to each other is handled.

By adopting the technical scheme, the top pressing block and the mounting seat are subjected to the surface chromium plating treatment close to each other, so that the abrasion is further reduced.

To sum up, the utility model discloses a beneficial technological effect does:

when the fastening bolt is screwed, the mounting seat is tightly abutted to the cutting blade, so that the cutting blade is clamped between the mounting seat and the fixing seat, in addition, the positioning column penetrates through the positioning hole of the cutting blade, the rotation of the cutting blade relative to the fixing seat is limited, so that the cutting blade is effectively fixed, when an operator unscrews the fastening bolt, the mounting seat can be separated from the cutting blade, at the moment, the operator can take the cutting blade off the positioning column to finish the disassembly of the cutting blade, the disassembly and assembly of the cutting blade of the operator are facilitated, the cutting machine can replace the appropriate cutting blade according to different use environments, and the application range is large;

the protective cover is divided into a fixed half cover and a movable half cover detachably connected with the fixed half cover, so that an operator can open the protective cover when disassembling and assembling the cutting blade, and the operation of the operator is facilitated;

the surface that cutting blade was kept away from to top briquetting and mount pad offsets for the mount pad receives spacingly on cutting blade's axis of rotation direction, has promoted the security, and when cutting blade rotated, the mount pad rotated along with cutting blade's pivoted, thereby reduced the wearing and tearing between top briquetting and the mount pad.

Drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

fig. 2 is a schematic structural view of the mounting portion.

In the figure: 1. a chassis; 11. a motor; 2. a protective cover; 21. fixing the half cover; 211. a second mounting piece; 22. a movable half cover; 221. a first mounting piece; 222. installing a bolt; 223. a rotating groove; 224. a rotating bearing; 225. pressing the block; 3. a handle; 4. a cutting blade; 41. positioning holes; 5. an installation part; 51. a fixed seat; 52. a positioning column; 53. a mounting seat; 531. mounting holes; 532. a countersunk hole; 54. and fastening the bolt.

Detailed Description

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

As shown in fig. 1, a hand-held cutting machine includes a housing 1, a protective cover 2, a handle 3, and a cutting blade 4. Since the technical point of the present embodiment is mainly the improvement of the protecting cover 2 and the cutting blade 4 in the existing cutting machine, the rest will be only briefly described. The case 1 is of a box structure, a motor 11 is fixed in the case, and an output shaft of the motor 11 penetrates through the outer side wall of the case 1. One end of the handle 3 is fixed with the case 1, so that an operator can hold the handle conveniently. The protection cover 2 comprises a fixed half cover 21 and a movable half cover 22, the fixed half cover 21 is a crescent cover body structure, the arc angle of the fixed half cover is 210 degrees, the arc of the fixed half cover 21 surrounds the center of a circle and coincides with the axis of the output shaft of the motor 11, the crescent outer side wall of the fixed half cover 21 is fixed with the side wall of the case 1 penetrating out of the output shaft of the motor 11, and in addition, the end part of the output shaft of the motor 11 penetrates through the fixed half cover 21 and is positioned in the fixed half cover 21. The movable half-cover 22 corresponds to the fixed half-cover 21 in structure, and fits the fixed half-cover 21, and the movable half-cover 22 is hinged to the fixed half-cover 21 near one side edge of the handle 3, and further, the movable half-cover 22 is vertically arranged with respect to the rotation axis of the fixed half-cover 21. The other side edge of half cover 22 of activity is fixed with first installation piece 221, and fixed half cover 21 keeps away from its one side edge with half cover 22 articulated department of activity and is fixed with second installation piece 211, and first installation piece 221 is the arc slice with second installation piece 211, and the arc edge that first installation piece 221 and second installation piece 211 laminated half cover 22 of activity and fixed half cover 21 respectively extends, and first installation piece 221 and second installation piece 211 laminate each other. The movable half cover 22 is provided with a mounting bolt 222, the end of the mounting bolt 222 passes through the first mounting piece 221 and the second mounting piece 211 in sequence, the mounting bolt 222 is in threaded connection with the second mounting piece 211, and when the mounting bolt 222 is tightened, the movable half cover 22 is fixed with the fixed half cover 21.

As shown in fig. 1, the cutting blade 4 is disposed in the protective cover 2, the cutting blade 4 is a circular sheet structure, an arc edge of the cutting blade 4 is open, and an axis of an output shaft of the motor 11 passes through a center of the cutting blade 4. The end of the output shaft of the motor 11 is provided with an installation part 5, as shown in fig. 2, the installation part 5 includes a fixing seat 51, a positioning column 52, an installation seat 53 and a fastening bolt 54, the fixing seat 51 is in a circular block shape, the axis of the fixing seat 51 coincides with the axis of the output shaft of the motor 11, and the end face of the fixing seat 51 far away from the cutting blade 4 is fixed to the end of the output shaft of the motor 11. The positioning posts 52 are cylindrical structures, the axes of the positioning posts are parallel to the axis of the fixing base 51, one end of each positioning post 52 is fixed to the end face, away from the motor 11, of the fixing base 51, four positioning posts 52 are arranged, and the four positioning posts 52 are uniformly distributed around the axis of the fixing base 51. The mounting seat 53 is arranged on one side of the cutting blade 4, which is far away from the fixed seat 51, the mounting seat 53 is in a circular block shape, the axis of the mounting seat 53 coincides with the axis of the fixed seat 51, and the end surfaces, which are close to each other, of the mounting seat 53 and the fixed seat 51 are subjected to chrome plating treatment. The mounting seat 53 is provided with a mounting hole 531 on an end surface close to the cutting blade 4, an opening of the mounting hole 531 is circular, and the mounting hole 531 is provided with four positions, and axes of the four positions are respectively overlapped with axes of the four positioning columns 52. The end face, away from cutting blade 4, of mounting seat 53 has been seted up counter bore 532, and counter bore 532 is the shoulder hole, and its opening is circular, and counter bore 532 and mounting hole 531 intercommunication, and counter bore 532 are equipped with everywhere, and the axis of everywhere counter bore 532 coincides with the axis of everywhere mounting hole 531 respectively. The surface of the cutting blade 4 is provided with a positioning hole 41, the opening of the positioning hole 41 is circular, the positioning hole 41 is provided with four positions, and the axes of the four positioning holes 41 are respectively overlapped with the axes of the four mounting holes 531. One end of the positioning post 52 far from the fixing base 51 passes through the positioning hole 41 and penetrates into the mounting hole 531, and the cylindrical surfaces of the positioning post 52 are respectively attached to the inner walls of the positioning hole 41 and the mounting hole 531. The fastening bolt 54 is a countersunk bolt, the end of the fastening bolt passes through the opening of the countersunk hole 532 and penetrates into the end face of the positioning column 52 in the mounting hole 531, the fastening bolt 54 is in threaded connection with the positioning column 52, when the fastening bolt 54 is screwed, the head of the fastening bolt 54 is completely screwed into the countersunk hole 532, and at this time, the two side surfaces of the cutting blade 4 are respectively attached and pressed with the mounting seat 53 and the chromium-plated surface of the fixing seat 51.

As shown in fig. 2, a rotation groove 223 is formed in the inner side wall of the movable half cover 22 close to the mounting seat 53, the opening of the rotation groove 223 is circular, the axis of the rotation groove 223 coincides with the axis of the mounting seat 53, and a rotation bearing 224 is provided in the rotation groove 223. The outer wall of the rotary bearing 224 is fixed with the arc-shaped inner wall of the rotary groove 223, and a top pressing block 225 is arranged in the rotary bearing 224. The top pressing block 225 is a circular block, the arc surface of the top pressing block is fixed with the inner wall of the rotating bearing 224, and the axis of the top pressing block 225 is coincident with the axis of the mounting seat 53. The end face of the jacking block 225 close to the cutting blade 4 protrudes out of the rotating groove 223 and is abutted against the end face of the mounting seat 53 far away from the cutting blade 4, and the surfaces of the jacking block 225 and the mounting seat 53 which are in contact with each other are subjected to chrome plating treatment.

This embodiment is when using, when fastening bolt 54 screws, mount pad 53 supports tightly with cutting blade 4, thereby make cutting blade 4 press from both sides tightly between mount pad 53 and fixing base 51, in addition, reference column 52 passes cutting blade 4's locating hole 41, the rotation of cutting blade 4 for fixing base 51 has been restricted, thereby fixed mounting cutting blade 4, and when operating personnel unscrewed fastening bolt 54, mount pad 53 can separate with cutting blade 4, at this moment, operating personnel takes off cutting blade 4 from reference column 52 and can accomplish cutting blade 4's dismantlement, operating personnel dismouting cutting blade 4 has been made things convenient for, make this cutting machine can change suitable cutting blade 4 according to different service environment, application scope is big.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a handheld cutting machine, includes quick-witted case (1), is fixed in safety cover (2) on quick-witted case (1), is fixed in handle (3) on quick-witted case (1) and sets up cutting blade (4) in safety cover (2), be equipped with motor (11) in quick-witted case (1), motor (11) output shaft is worn out quick-witted case (1) and penetrate in safety cover (2), characterized by: the end part of an output shaft of the motor (11) is provided with an installation part (5) for installing the cutting blade (4), the installation part (5) comprises a fixed seat (51) fixed on the output shaft of the motor (11), a positioning column (52) fixed on the fixed seat (51) and an installation seat (53), and the installation seat (53) and the fixed seat (51) are respectively arranged on two sides of the cutting blade (4); at least two positioning holes (41) are formed in the surface of the cutting blade (4), mounting holes (531) aligned with the positioning holes (41) are formed in the surface, close to the cutting blade (4), of the mounting seat (53), at least two positioning columns (52) are arranged, and one ends, far away from the fixed seat (51), of the positioning columns (52) penetrate through the positioning holes (41) and penetrate into the mounting holes (531); and a fastening bolt (54) is arranged on the mounting seat (53), the fastening bolt (54) penetrates through the mounting seat (53) and penetrates into the positioning column (52), and the fastening bolt (54) is in threaded connection with the positioning column (52).

2. A hand held cutting machine as claimed in claim 1 wherein: a countersunk hole (532) is formed in the side wall, away from the cutting blade (4), of the mounting seat (53), the countersunk hole (532) is communicated with the mounting hole (531), and the fastening bolt (54) penetrates through the countersunk hole (532) and is in threaded connection with the positioning column (52); the head of the fastening bolt (54) is arranged in the counter bore (532).

3. A hand held cutting machine as claimed in claim 1 wherein: the surface of the fixed seat (51) close to the cutting blade (4) and the surface of the mounting seat (53) close to the cutting blade (4) are subjected to chrome plating treatment.

4. A hand held cutting machine as claimed in claim 1 wherein: the protection cover (2) comprises a fixed half cover (21) fixed on the case (1) and a movable half cover (22) detachably connected and fixed with the fixed half cover (21).

5. A hand held cutting machine as claimed in claim 4 wherein: fixed half cover (21) one side edge activity half cover (22) are articulated, fixed half cover (21) the other side edge is equipped with construction bolt (222), construction bolt (222) tip passes in proper order activity half cover (22) and fixed half cover (21), just construction bolt (222) with fixed half cover (21) threaded connection.

6. A hand held cutting machine as claimed in claim 4 wherein: the movable half cover (22) is close to the surface of the mounting seat (53) and is provided with a rotating groove (223), the rotating groove (223) is internally fixed with a rotating bearing (224), the rotating bearing (224) is internally fixed with a top pressing block (225), and the top pressing block (225) is attached to and abutted against the side wall of the cutting blade (4) far away from the mounting seat (53).

7. A hand held cutting machine as claimed in claim 6 wherein: the top pressing block (225) and the mounting seat (53) are subjected to surface chromium plating treatment in a mutually close mode.