TWI773459B - Anti-vibration device for air tools - Google Patents

Abstract

The present invention relates to an anti-vibration device for a pneumatic tool, which comprises a body, a buffer pad and a cylinder group. The buffer pad is an annular cylinder accommodated in the body, and is provided with at least one connecting channel for communicating with the buffer pad. The cylinder group can be movably accommodated in the body and abut against the buffer pad. Since the spring coefficient of the buffer pad is higher than that of the spring of the anti-vibration device of the existing pneumatic hammer, The buffer pad will not be twisted arbitrarily when being squeezed, but is stably compressed along the axial direction, thereby providing a buffering effect, and effectively improving the fact that the spring of the anti-vibration device of the existing pneumatic hammer is easily twisted when it is compressed by the cylinder group. And the cylinder group of the anti-vibration device of the existing pneumatic hammer is sucked and cannot be actuated, thus causing the problem of the failure of the existing pneumatic hammer.

Description

Anti-vibration device for air tools

The invention relates to a pneumatic tool, in particular to a shockproof device for a pneumatic hammer.

Please refer to my country's New Patent No. 485879 "Pneumatic Hammer Device with Anti-Vibration Front and Back". The existing anti-vibration device of a pneumatic hammer includes a main body and a cylinder group combined with the main body, wherein the inner cavity of the main body is at the rear of the cylinder group. The end is provided with a spring, through which the recoil force generated by the action of the ram of the cylinder group is relieved.

However, due to the structure of the spring, the elastic coefficient is low, that is, it is generally soft and easily deformed. When the spring is compressed by the cylinder group, it is easy to twist arbitrarily, thus causing the failure of the existing pneumatic hammer.

Secondly, although the anti-vibration device of the existing pneumatic hammer is provided with a buffer pad at the rear end of the cylinder group, the buffer pad is a solid cylinder, and during use, when compressed by the cylinder group, it is easy to be damaged by a vacuum phenomenon. It is adsorbed on the bottom surface of the inner cavity of the main body, and causes the cylinder group to be sucked and unable to operate normally. To sum up, the existing anti-vibration device of the pneumatic hammer does need to be improved.

In order to solve the problem that when the spring of the anti-vibration device of the existing pneumatic hammer is compressed by the cylinder group, it is easy to twist arbitrarily, and the buffer pad of the anti-vibration device of the existing pneumatic hammer will adsorb the cylinder group, so that the cylinder group cannot be operated, and thus the existing The problem of the failure of the pneumatic hammer, the present invention provides an anti-vibration device for a pneumatic tool, which effectively improves the above problem.

The invention relates to an anti-vibration device for a pneumatic tool, which includes: a main body, which includes an accommodating part, the accommodating part has a bottom surface; a buffer pad, which is an annular cylinder and is accommodated in a In the accommodating part of the body, the buffer The pad has an axial direction and two end faces, the two end faces are formed at intervals along the axial direction, and one end face abuts against the bottom surface of the accommodating portion, the buffer pad is provided with at least one connecting channel, and the at least one connecting channel communicates with each other. The inner and outer sides of the cushion pad; and a cylinder group, which can be movably accommodated in the accommodating portion of the main body, and includes a cylinder liner and a cylinder block, the cylinder liner has an abutting portion, and The abutting portion abuts against the other end face of the buffer pad, and the cylinder block is combined with the cylinder liner.

Further, in the above-mentioned anti-vibration device for a pneumatic tool, the at least one connecting channel is recessed on one of the end surfaces.

Further, in the above-mentioned anti-vibration device for a pneumatic tool, the at least one connecting channel is provided through the side wall of the buffer pad.

Still further, in the above-mentioned anti-vibration device for a pneumatic tool, the buffer pad is an annular cylinder made of rubber.

Further, in the above-mentioned anti-vibration device for a pneumatic tool, a hammer is arranged inside the cylinder block, and the front end of the cylinder liner is sleeved on the cylinder block.

Still further, in the above-mentioned anti-vibration device of a pneumatic tool, the anti-vibration device of the pneumatic tool includes an exhaust pipe, and the exhaust pipe is sleeved on the cylinder block and combined with the accommodating part of the main body.

With the above technical features, since the elastic coefficient of the buffer pad is higher than that of the spring of the anti-vibration device of the existing pneumatic hammer, the buffer pad will not be twisted arbitrarily when being squeezed, but is stably compressed along the axial direction, Thereby, the effect of buffering is provided, and the spring of the anti-vibration device of the existing pneumatic hammer is easily twisted when it is compressed by the cylinder group, and the cylinder group of the anti-vibration device of the existing pneumatic hammer is sucked and cannot be moved, thus causing the existing pneumatic hammer. Hammer failure problem.

10: Ontology

11: accommodating part

111: Bottom

112: Internal thread

12: Grip

20,20A: Buffer

201: End face

21,21A: even channel

30: Cylinder group

31: Cylinder liner

311: Abutment

32: Cylinder block

33: Rammer

40: Exhaust pipe

41: External thread

42: Perforation

FIG. 1 is an exploded perspective view of the first preferred embodiment of the present invention.

2 is a side sectional view of the first preferred embodiment of the present invention.

FIG. 3 is a schematic view of the operation of the first preferred embodiment of the present invention.

4 is a partially enlarged side sectional view of the second preferred embodiment of the present invention.

In order to understand the technical features and practical effects of the present invention in detail, and to realize it according to the contents of the description, the preferred embodiments shown in the drawings are further described in detail as follows: The present invention is a shockproof device for a pneumatic tool, which is The first preferred embodiment is shown in FIG. 1 to FIG. 3 , and includes a main body 10 , a buffer pad 20 , a cylinder group 30 and an exhaust pipe 40 , wherein: the main body 10 includes an accommodating portion 11 and an exhaust pipe 40 . A handle 12, wherein the accommodating portion 11 forms a closed groove with an open end and a closed end, the accommodating portion 11 forms a bottom surface 111 at the closed end, and the accommodating portion 11 An inner thread 112 is formed at the open end; the handle 12 is protruded from the middle section of the outer surface of the accommodating portion 11 .

The buffer pad 20 is an annular cylinder made of rubber, and has an axial direction and two end surfaces 201. The end surfaces 201 are formed at intervals along the axial direction. The buffer pad 20 is accommodated in the body 10 in the accommodating portion 11, and one end surface 201 of the buffer pad 20 abuts against the bottom surface 111 of the accommodating portion 11, further, the buffer pad 20 has at least one connecting channel 21 to communicate with the inner and outer surfaces of the buffer pad 20. On the outer sides, in the first preferred embodiment of the present invention, please refer to FIG. 2 and FIG. 3 , the buffer pad 20 has two connecting channels 21 , and the two connecting channels 21 are concavely formed in the The end surface 201 of the buffer pad 20 abuts against the bottom surface 111 of the accommodating portion 11 , and the two connecting channels 21 are diametrically opposite, so that gas can flow from the inside of the buffer pad 20 to the outside of the buffer pad 20 through one of the connecting channels 21 , or reverse flow.

Further, please refer to the second preferred embodiment shown in FIG. 4 , the buffer pad 20A has two connecting channels 21A, and each of the connecting channels 21A is disposed through the sidewall of the buffer pad 20A, and The two connecting passages 21A are diametrically opposite, so as to communicate with the inner and outer sides of the buffer pad 20A.

Please refer to FIG. 2 and FIG. 3 , the cylinder group 30 is movably accommodated in the accommodating portion 11 of the main body 10 , and includes a cylinder liner 31 and a cylinder block 32 , one end of the cylinder liner 31 is An abutting portion 311 is formed, and the abutting portion 311 abuts against the end surface 201 of the buffer pad 20 away from the bottom surface 111 of the accommodating portion 11 , and the cylinder block 32 extends into the cylinder liner 31 and communicates with the cylinder liner 31 The cylinder block 32 is internally provided with a ram 33, and the ram 33 can slide forward and backward in the cylinder block 32, thereby producing an impact effect.

Please refer to FIG. 1 to FIG. 3 , the exhaust pipe 40 is sleeved on the cylinder block 32 , the rear end of the exhaust pipe 40 abuts against the front end of the cylinder liner 31 , and the exhaust pipe 40 has An external thread 41, the external thread 41 is used to combine with the internal thread 112 of the accommodating portion 11 of the main body 10, so that the exhaust pipe 40 is combined with the accommodating portion 11 of the main body 10, the exhaust pipe 40 is The front end is provided with a plurality of through holes 42 at intervals, and the gas is discharged from the plurality of through holes 42 .

With the above technical features, when the cylinder group 30 is actuated by the push of the high-pressure gas, the ram 33 slides forward in the cylinder block 32 to generate an impact force, then returns to the original position, and repeats this process. , the cylinder liner 31 moves backward due to the recoil force and squeezes the buffer pads 20 and 20A. Since the elastic coefficient of the buffer pads 20 and 20A is higher than that of the spring of the anti-vibration device of the existing pneumatic hammer, the buffer pad 20 20A will not be twisted arbitrarily when being squeezed, but will be stably compressed along the axial direction, so as to provide the effect of buffering. The air pressure inside and outside 20, 20A prevents the cushion pad 20 from being compressed, and the cylinder group 30 is adsorbed by the cushion pad 20, 20A to a position close to the bottom surface 111 due to a situation similar to a vacuum formed by the air pressure difference, so The problem that the cylinder group of the shock-proof device of the conventional pneumatic hammer can be prevented from being sucked and cannot be actuated. To sum up, the present invention effectively improves that when the spring of the anti-vibration device of the existing pneumatic hammer is compressed by the cylinder group, it is easy to twist, and the cylinder group of the anti-vibration device of the existing pneumatic hammer is sucked and cannot be actuated, thus causing the existing pneumatic hammer. Hammer failure problem.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Anyone with ordinary knowledge in the technical field can utilize the present invention without departing from the scope of the technical solutions proposed by the present invention. Equivalent embodiments with partial changes or modifications made to the disclosed technical content, which do not depart from the technical solution content of the present invention, are still within the scope of the technical solution of the present invention.

10: Ontology

11: accommodating part

112: Internal thread

12: Grip

20: Cushion

201: End face

21: even channel

30: Cylinder group

31: Cylinder liner

32: Cylinder block

40: Exhaust pipe

41: External thread

42: Perforation

Claims (6)

An anti-vibration device for a pneumatic tool, which includes: a body, which includes an accommodating portion, the accommodating portion has a bottom surface; A buffer pad, which is an annular cylinder and is accommodated in the accommodating portion of the body, the buffer pad has an axial direction and two end surfaces, the end surfaces are formed at intervals along the axial direction, and one of them The end surface abuts against the bottom surface of the accommodating portion, the buffer pad is provided with at least one connecting channel, and the at least one connecting channel communicates with the inner and outer sides of the buffer pad; and A cylinder group, which can be movably accommodated in the accommodating portion of the body, and includes a cylinder liner and a cylinder block, the cylinder liner has an abutting portion, and the abutting portion and the other side of the buffer pad The end faces abut against each other, and the cylinder block is combined with the cylinder liner. The anti-vibration device for an air tool as claimed in claim 1, wherein the at least one connecting channel is recessed on one of the end surfaces. The anti-vibration device for an air tool as claimed in claim 1, wherein the at least one connecting channel is provided through the side wall of the buffer pad. The anti-vibration device for an air tool according to any one of claims 1 to 3, wherein the buffer pad is an annular cylinder made of rubber. The anti-vibration device for an air tool as claimed in claim 4, wherein a ram is arranged inside the cylinder block, and the front end of the cylinder liner is sleeved on the cylinder block. The anti-vibration device for a pneumatic tool as claimed in claim 5, wherein the anti-vibration device for the pneumatic tool includes an exhaust pipe, the exhaust pipe is sleeved on the cylinder block and combined with the accommodating portion of the body.

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