CN213917598U

CN213917598U - Stroke clutch device and angle grinder with same

Info

Publication number: CN213917598U
Application number: CN202022026354.7U
Authority: CN
Inventors: 李挺进; 胡志广; 徐宛柘; 陈敏
Original assignee: Zhejiang Burley Tools Co ltd
Current assignee: Zhejiang Burley Tools Co ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2021-08-10
Anticipated expiration: 2030-09-16

Abstract

The utility model discloses a stroke clutch and have stroke clutch's angle mill relates to the safety technology field, including first mobile device (7), displacement buffering subassembly and second mobile device (10), displacement buffering subassembly is located between first mobile device (7) and second mobile device (10), displacement buffering subassembly includes cushion chamber main part and movable assembly, form the cushion chamber in the cushion chamber main part; in a stop state, the movable assembly cuts off the buffer cavity of the displacement buffer assembly to prevent the first moving device (7) from moving downwards; in the working state, the movable assembly forms a buffer path in the buffer cavity under the action of centrifugal force. The utility model discloses the realization is all the time not to second mobile device (10) application of force in working process first mobile device (7), therefore clamping device all can not loosen, and clamping device loosens and causes harm when preventing high-speed rotation.

Description

Stroke clutch device and angle grinder with same

Technical Field

The utility model relates to a safety device technical field, more specifically say so, relate to a stroke clutch and have stroke clutch's angle mill.

Background

In the prior art, the working piece or the cutting piece of the angle grinder is fixed through threads of an upper pressure plate, a lower pressure plate and an output shaft. When the working piece is replaced, the output shaft is locked by the self-locking pin and does not rotate, and the upper pressure plate is screwed down by a special spanner to replace the grinder. The utility model discloses an auxiliary device is changed with angle work piece to angle grinder in chinese patent CN209007330U, during its use, coincide the device and clamp on the fixed reverse screw thread piece of angle work piece, the wheel is held in the rotation, screw engagement effect through screw thread reason and screw thread slide, make four screw thread slides internal contraction, then make the centre gripping post carry out the centre gripping to reverse screw thread piece, it is spacing to clamp through the locating pin simultaneously, further rotate, the screw thread lock dies, transmit the inner disc through holding wheel torsion and transmit the chuck again through the screw thread slide, thereby make reverse screw thread piece not hard up, realize the dismantlement of angle work piece. In the prior art, the output shaft can be locked only when the self-locking pin button is pressed down, so that when the working piece is disassembled, the self-locking pin button must be pressed by one hand, and the pressing plate is screwed by the other hand taking a special spanner, so that the operation is complex and the efficiency is low. Meanwhile, as the working piece is screwed and fixed with the output shaft through the upper pressure plate, the lower pressure plate, the working piece and the upper pressure plate are easily locked after the angle grinder runs for a period of time and are difficult to disassemble, and a user can have accidental injury in the process of forcible disassembly, thereby causing personal injury; in addition, when the quick-change angle grinder is used, the clamping device can be opened or loosened by touch or vibration unintentionally, the working piece is loosened, the working piece flies out, and the personal safety is greatly influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the aforesaid provided, provide a stroke clutch of operation safety is simple, efficient and safe work and have stroke clutch's angle mill.

The technical scheme provided comprises the following steps:

the stroke clutch device of the utility model comprises a first moving device 7, a displacement buffer component and a second moving device 10, wherein the displacement buffer component is positioned between the first moving device 7 and the second moving device 10, the displacement buffer component comprises a buffer cavity main body and a movable component, and a buffer cavity is formed in the buffer cavity main body;

in a stop state, the movable assembly cuts off the buffer cavity of the displacement buffer assembly, and the first moving device 7 is prevented from moving downwards;

in the working state, the movable assembly forms a buffer path in the buffer cavity under the action of centrifugal force.

In the stroke clutch device of the present invention, the buffer chamber main body includes a base 21, and the movable assembly is disposed on the base 21.

In the stroke separating device of the present invention, the buffer chamber main body further includes a cover plate 22, the cover plate 22 has a hollow portion, the cover plate 22 is mounted on the base 21, so that the hollow portion of the cover plate 22 and the base 21 form the buffer chamber therebetween.

In the stroke clutch device of the present invention, the movable assembly includes a plurality of first movable blocks 17, the first movable blocks 17 are located in the buffer cavity.

In the stroke clutch device of the present invention, the base 21 is provided with a baffle 20, one end of the first movable block 17 is movably connected to the base 21, and in an operating state, the other end of the first movable block 17 contacts with the baffle 20, and a buffer path is formed in the buffer cavity; in the stopped state, the other ends of the plurality of first movable blocks 17 are in close contact with each other, and the buffer path in the buffer chamber is interrupted.

In the stroke clutch device of the present invention, the movable assembly includes a movable spring 24 and a plurality of second movable blocks 23, the movable spring 24 and the buffer chamber main body are sequentially connected, the movable spring 24 and the second movable blocks 23 are all disposed in the buffer chamber, and in a stop state, the plurality of second movable blocks 23 contact with each other to block the buffer path; in the working state, the second movable block 23 compresses the moving spring 24, and a buffer path is formed in the buffer chamber.

In the stroke clutch device of the present invention, the base 21 has a recessed portion therein, and in the operating state, the second movable block 23 is in the recessed portion to perform relative sliding.

In the stroke clutch device, the second movable block 23 is a U-shaped structure, the movable spring 24 is disposed in the groove of the U-shaped structure, the U-shaped opening of the U-shaped structure faces the inside side wall of the buffer cavity main body.

In the stroke clutch device, the second movable block 23 is a square structure, the square structure moves the spring 24 and the inside lateral wall of the buffer chamber main body connects gradually.

The angle grinder of the utility model comprises a stroke clutch device.

In the angle grinder of the present invention, further comprising: the cam device, the first moving device 7, the displacement buffer assembly, the second moving device 10, the clamping device and the working piece fixing device are sequentially connected, and in a working state, the first moving device 7 does not apply force to the second moving device 10 all the time under the action of the displacement buffer assembly; in a stop state, opening a quick-change trigger of the angle grinder, and quickly disassembling the working piece 16; in the working state, the quick-change trigger of the angle grinder is in the open or closed state and cannot detach the working piece 16.

The utility model has the advantages that:

1. when the machine is stopped, the first moving means 7 is pressed down onto the moving means by a rotary movement of the rotating means, so that the second moving means 10 also presses down the push-open clamping means, and the solid shaft 15 is released when the clamping means are pushed open.

2. When the machine works, the movable device arranged below the first moving device 7 is thrown to two sides under the action of centrifugal force, the lower part of the first moving device 7 is just vacated after the movable device is thrown, the rotating device is randomly operated, the first moving device 7 cannot be in contact with the second moving device 10, the elastic chuck 13 cannot be pushed away, and the safety and reliability of the machine during working are improved.

Drawings

FIG. 1 is a schematic view of a clutch safety device in embodiment 1

Figure 2 is the structural section view of the utility model

FIG. 3 is a schematic diagram showing the structure of the clutch safety device in the non-centrifugal state in embodiment 1

FIG. 4 is a schematic diagram showing the centrifugal state of the clutch safety device in embodiment 1

FIG. 5 is a schematic view of the clutch safety device of embodiment 2

FIG. 6 is a schematic diagram showing the structure of the clutch safety device in the non-centrifugal state in embodiment 2

Fig. 7 is a structural schematic diagram of the centrifugal state of the clutch safety device in embodiment 2: the device comprises a handle 1, a cylindrical pin 2, a radial contour line maximum dimension position 3, a cam 4, a radial contour line minimum dimension position 5, a stroke spring 6, a first moving device 7, a clutch safety device 9, a second moving device 10, an elastic chuck sleeve 11, an output shaft 12, an elastic chuck 13, a first pressing plate 14.1, a second pressing plate 14.2, a solid shaft 15, a working piece 16, a first movable block 17, a pin hole 17.1, a pin shaft 18, a torsion spring 19, a baffle plate 20, a base 21, a cover plate 22, a second movable block 23 and a moving spring 24.

Detailed Description

Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While specific embodiments of the invention are shown in the drawings, it will be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

It should be noted that certain terms are used throughout the description and claims to refer to particular components. As one skilled in the art will appreciate, various names may be used to refer to a component. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The following description is of the preferred embodiment of the invention, and is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the invention. The protection scope of the present invention is subject to the limitations defined by the appended claims.

Example 1:

in this embodiment, as shown in fig. 1-2, the stroke clutch device includes a first moving device 7, a displacement buffer assembly and a second moving device 10, the displacement buffer assembly is located between the first moving device 7 and the second moving device 10, the displacement buffer assembly includes a buffer cavity main body and a movable assembly, and a buffer cavity is formed in the buffer cavity main body;

in a stop state, the movable assembly cuts off the buffer cavity of the displacement buffer assembly to prevent the first moving device 7 from moving downwards;

in the working state, the movable assembly forms a buffer path in the buffer cavity under the action of centrifugal force. By installing the displacement buffer assembly between the first moving device 7 and the second moving device 10, the first moving device 7 does not apply force to the second moving device 10 all the time in the working process, so that the clamping device cannot be loosened no matter how the clamping device is operated by mistake, and the safety and reliability of the machine in the working process are improved.

Example 2:

in this embodiment, as shown in fig. 1-2, the displacement buffer device includes a first moving device 7, a displacement buffer assembly and a second moving device 10, the displacement buffer assembly is located between the first moving device 7 and the second moving device 10, the displacement buffer assembly includes a buffer cavity main body and a movable assembly, and a buffer cavity is formed in the buffer cavity main body; in a stop state, the movable assembly cuts off the buffer cavity of the displacement buffer assembly to prevent the first moving device 7 from moving downwards; in the working state, the movable assembly forms a buffer path in the buffer cavity under the action of centrifugal force.

In this embodiment, the buffer chamber body includes a base 21, and the movable member is mounted on the base 21.

In this embodiment, the buffer chamber body further includes a cover plate 22, the cover plate 22 has a hollow portion, and the cover plate 22 and the base 21 are mounted together such that the buffer chamber is formed between the hollow portion of the cover plate 22 and the base 21.

In the present embodiment, the base 21 and the cover 22 are fixedly connected by bolts.

In the present embodiment, as shown in fig. 1 to 4, the movable assembly includes two first movable blocks 17, the two first movable blocks 17 are located in the buffer cavity to prevent the first movable blocks 17 from popping out, and a pin hole 17.1 is provided at one end of each first movable block 17.

In this embodiment, the movable assembly further includes two shaft pins 18 and two torsion springs 19, the shaft pins 18 sequentially pass through the pin holes 17.1 and the torsion springs 19, and then are mounted on the base 21, so that the first movable block 17 is sleeved on the shaft pins 18 and can rotate relative to the base 21.

In this embodiment, a baffle 20 is disposed on the base 21, one end of the first movable block 17 is movably connected to the base 21, and in a working state, the other end of the first movable block 17 contacts the baffle 20, and a buffer path is formed in the buffer cavity; in the stopped state, the other ends of the plurality of first movable blocks 17 are in close contact with each other, and the buffer path in the buffer chamber is cut off.

In this embodiment, the base 21 is further provided with two through holes, and the through holes correspond to the pin holes 17.1 one by one and are used for installing the shaft pins 18.

Meanwhile, the embodiment also provides a flange clamping device with a stroke clutch device, and the rotary flange clamping device can be used for various machines for realizing quick clamping or loosening motion, such as clamping tools of band saw working blades 16 of cutting machines, marble machines, electric circular saws and the like.

Meanwhile, the embodiment also provides the angle grinder with the stroke clutch device, which comprises a force application device, a clamping device and a working piece fixing device, wherein the cam device, the first moving device 7, the displacement buffer assembly, the second moving device 10, the clamping device and the working piece fixing device are sequentially connected, and in the working state, the first moving device 7 does not apply force to the second moving device 10 all the time under the action of the displacement buffer assembly, so that the clamping device is prevented from being loosened in the working process.

In the angle grinder with the stroke clutch device provided by the embodiment, the force application device comprises a cam 4, a handle 1 and a cylindrical pin 2. The cam 4 is provided with a handle 1 which is convenient for rotating the cam 4. The cam 4 rotates around the cylindrical pin 2 with the cylindrical pin 2 as a rotation axis, and the cylindrical pin 2 is used for fixing the cam 4.

In the angle grinder with the stroke clutch device provided by the embodiment, the angle grinder further comprises a hollow output shaft 12, and the stroke clutch device and the clamping device are both positioned inside the output shaft 12.

In the angle grinder with the stroke clutch device provided by the embodiment, the clamping device is the elastic chuck 13, the outer wall of the clamping part of the elastic chuck 13 is provided with the conical part, when the outer wall of the clamping part of the elastic chuck 13 is completely contacted with the chamfer of the inner wall of the elastic chuck sleeve 11, the elastic chuck 13 is in a locking state, and when the outer wall of the clamping part of the elastic chuck 13 is completely separated from the chamfer of the inner wall of the elastic chuck 13, the elastic chuck 13 is in a loosening state.

In the angle grinder with the stroke clutch device provided by the embodiment, the elastic chuck 13 clamps the solid shaft 15, the upper end of the solid shaft 15 is provided with a plurality of clamping tooth grooves, the upper end of the inner part of the elastic chuck 13 is provided with a plurality of clamping teeth matched with the clamping tooth grooves of the solid shaft 15, and when the elastic chuck 13 is in a clamping state, the elastic chuck 13 is further enabled to fasten the solid shaft 15 through the matching of the clamping teeth and the clamping tooth grooves, so that the solid shaft 15 is prevented from moving up and down.

In the angle grinder with the stroke clutch device provided by the embodiment, the solid shaft 15 can be clamped or loosened by the elastic chuck 13, when the elastic chuck 13 is in a loosening state, the solid shaft 15 can be taken out of the elastic chuck 13, and when the elastic chuck 13 is in a locking state, the solid shaft 15 can be clamped.

In the angle grinder with the stroke clutch device provided by the embodiment, the inner ring of the elastic chuck sleeve 11 is provided with an inclined chamfer, the chamfer on the elastic chuck sleeve 11 is matched with the chamfer on the elastic chuck 13 and can slide relatively, and the chamfer of the elastic chuck sleeve 11 is subjected to carburizing treatment or nitriding treatment, so that the wear resistance of the elastic chuck sleeve 11 is improved.

In the angle grinder with the stroke clutch device according to the present embodiment, the output shaft 12 has an upper cover therein, and a hole stopper is provided between the output shaft 12 and the upper cover, and the upper cover and the output shaft 12 are sealingly connected by the hole stopper.

In the angle grinder with the stroke clutch device provided in the embodiment, the upper cover and the first moving device 7 are connected through the stroke spring 6, and the first moving device 7 can move up and down within the elastic range of the stroke spring 6.

In the angle grinder with the stroke clutch device provided by the embodiment, the working piece fixing device comprises a solid shaft 15, a first pressing plate 14.1 and a second pressing plate 14.2, the central shaft sequentially passes through the first pressing plate 14.1 and the second pressing plate 14.2, then the solid shaft 15 is connected with the output shaft 12 to fix the solid shaft 15, and the first pressing plate 14.1 is located above the second pressing plate 14.2.

In the angle grinder with the stroke clutch device provided by the embodiment, the working sheet 16 is arranged between the first pressing plate 14.1 and the second pressing plate 14.2.

In the angle grinder with the stroke clutch device provided by the embodiment, when the machine is not operated, the cam 4 rotates to the position 5 with the minimum radial contour line size to be contacted with the first moving device 7, the rotating device is positioned at the first position, the clamping device is in a clamping state at the moment, and when the cam 4 rotates to the position 3 with the maximum radial contour line size to be contacted with the first moving device 7, the rotating device is positioned at the second position, and the clamping device is in a loosening state at the moment. The contact surface of the cam 4 and the first moving device 7 is carburized or nitrided, so that the cam 4 or the first moving device 7 is more wear-resistant, and the service life of the cam is prolonged.

In the angle grinder with the stroke clutch device provided by the embodiment, when the machine stops working, the first movable blocks 17 arranged below the first moving device 7 are always engaged with each other below the first moving device 7 under the action of the torsion springs 19; when the machine is in a working state, the two first movable blocks 17 are thrown to two sides by taking the shaft pins 18 as centers respectively under the action of centrifugal force, the lower part of the first moving device 7 is just vacated after the first movable blocks are thrown away to form a buffering path, the first moving device 7 can not be contacted with the second moving device 10 by randomly operating the cam 4, the elastic chuck 13 can not be pushed away, and the machine is reliable and practical when in working.

Example 3:

in this embodiment, as shown in fig. 5 to 7, the movable assembly includes a moving spring 24 and two second movable blocks 23, and the second movable blocks 23, the moving spring 24 and the buffer chamber main body are connected in this order.

In this embodiment, the second movable block 23 is a U-shaped structural member, and the movable spring 24 is disposed in a groove of the U-shaped structural member, and a U-shaped opening of the U-shaped structural member faces a side wall inside the buffer cavity main body.

In this embodiment, the base 21 further has a flat concave portion therein, and the U-shaped structural member is adapted to the concave portion thereof, so that the U-shaped structural member can slide relatively in the concave portion, and in the stop state, the two U-shaped structural members are always in contact with each other under the elastic force of the moving spring 24.

In this embodiment, a buffer chamber is formed between the cover 22 and the concave portion inside the base 21, and both the moving spring 24 and the second movable block 23 are disposed in the buffer chamber, so that the second movable block 23 does not pop out.

In this embodiment, in the stop state, the two U-shaped structural members contact each other to block the buffer path, the first moving device 7 contacts the upper surface of the U-shaped structural member, and at this time, the force applying device is rotated from the first position to the second position, the force applying device pushes the first moving device 7 to move downward, and the first moving device 7 pushes the U-shaped structural member to push the second moving device 10 to move downward, so as to release the clamping device, thereby performing quick replacement of the working piece 16; under operating condition, U type structure is along base 21 radial direction compression removal spring 24 under the effect of centrifugal force, lead to two U type structures to separate each other, form the buffering route in the buffer cavity, no matter how rotating force applying device this moment, force applying device promotes first mobile device 7 and moves down, first mobile device 7 moves along buffering route this moment, do not contact with second mobile device 10 all the time, also do not exert decurrent effort to U type structure or second mobile device 10 simultaneously, guarantee the safety of machine in the course of the work, make the machine reliable and practical promptly at the during operation.

Example 4:

in this embodiment, the second movable block 23 is a square structural member, and the square structural member, the movable spring 24 and the side wall inside the buffer chamber main body are connected in sequence.

In this embodiment, the square structural member is adapted to the flat recessed portion inside the base 21.

In this embodiment, in the stop state, the two square structural members contact each other to cut off the buffer path, the first moving device 7 contacts the upper surface of the square structural member, at this time, the force application device is rotated from the first position to the second position, the force application device pushes the first moving device 7 to move downward, the first moving device 7 pushes the square structural member to push the second moving device 10 to move downward, so as to loosen the clamping device to perform quick replacement of the working sheet 16; under operating condition, square structure compression removal spring 24 along base 21 radial direction under the effect of centrifugal force, lead to two square structure alternate segregation, form the buffering route in the buffering intracavity, no matter how rotate force application device this moment, force application device promotes first mobile device 7 and moves down, first mobile device 7 moves along buffering route this moment, do not contact with second mobile device 10 all the time, also do not exert decurrent effort to square structure or second mobile device 10 simultaneously, guarantee the safety of machine in the course of the work, make the machine reliable and practical promptly at the during operation.

The above-mentioned embodiments are further described in detail for the purpose of the present invention, and it should be understood that although the present invention is described in terms of implementation, the above-mentioned embodiments are exemplary and not intended to limit the scope of the present invention, and any changes, modifications, substitutions and variations of the above-mentioned embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention should be included in the scope of the present invention.

Claims

1. The stroke clutch device is characterized by comprising a first moving device (7), a displacement buffering assembly and a second moving device (10), wherein the displacement buffering assembly is positioned between the first moving device (7) and the second moving device (10), the displacement buffering assembly comprises a buffering cavity body and a movable assembly, and a buffering cavity is formed in the buffering cavity body;

in a stop state, the movable assembly cuts off the buffer cavity of the displacement buffer assembly to prevent the first moving device (7) from moving downwards;

2. The travel clutch assembly according to claim 1, wherein the cushion chamber body includes a base (21), and the movable member is disposed on the base (21).

3. The stroke clutch device according to claim 2, wherein the buffer chamber body further comprises a cover plate (22), the cover plate (22) has a hollow portion, and the cover plate (22) is mounted with the base (21) such that the buffer chamber is formed between the hollow portion of the cover plate (22) and the base (21).

4. The travel clutch assembly according to claim 2, wherein the movable assembly includes a plurality of first movable blocks (17), the first movable blocks (17) being located within the buffer cavity.

5. The stroke clutch device according to claim 4, characterized in that the base (21) is provided with a baffle (20), one end of the first movable block (17) is movably connected with the base (21), and under the action of centrifugal force, the other end of the first movable block (17) is contacted with the baffle (20) in a working state, and a buffer path is formed in the buffer cavity; in the stopped state, the other ends of the plurality of first movable blocks (17) are in close contact with each other, and the buffer path in the buffer chamber is cut off.

6. The stroke clutch device according to claim 2, wherein the movable assembly comprises a movable spring (24) and a plurality of second movable blocks (23), the movable spring (24) and the buffer cavity body are connected in sequence, the movable spring (24) and the second movable blocks (23) are arranged in the buffer cavity, and in a stop state, the second movable blocks (23) are in contact with each other to cut off the buffer path; under the action of centrifugal force, the second movable block (23) compresses a movable spring (24) to form a buffer path in the buffer cavity.

7. The travel clutch device according to claim 6, wherein the base (21) has a recessed portion therein, and the second movable block (23) performs relative sliding movement in the recessed portion in the operating state.

8. The stroke clutch device according to claim 6, wherein the second movable block (23) is a U-shaped structural member, the movable spring (24) is arranged in a groove of the U-shaped structural member, and a U-shaped opening of the U-shaped structural member faces to the side wall of the interior of the buffer cavity body.

9. The travel clutch device according to claim 6, wherein the second movable block (23) is a square structural member, and the square structural member, the moving spring (24) and the side wall inside the buffer chamber body are connected in sequence.

10. An angle grinder comprising a stroke clutch device according to any one of claims 1 to 9.

11. The angle grinder of claim 10, further comprising: the cam device, the first moving device (7), the displacement buffer assembly, the second moving device (10), the clamping device and the working piece fixing device are sequentially connected, and the first moving device (7) does not apply force to the second moving device (10) all the time under the action of the displacement buffer assembly in a working state; under the stop state, a quick change trigger of the angle grinder is opened, and the working piece (16) is quickly disassembled; under the working state, the quick-change trigger of the angle grinder is in an open or closed state and cannot detach the working piece (16).