Pneumatic hammer provided with shock absorbing device

FIELD: building equipment.

SUBSTANCE: pneumatic hammer includes handle, jacket, housing mounted in jacket, air shock absorbing chamber and shock absorbing spring. Sleeve is arranged between handle and jacket; air supply branch pipe is mounted in said sleeve with possibility of motion. Air shock absorbing chamber is formed by means of handle and sleeve. Shock absorbing spring is mounted between beads formed on housing and on jacket.

EFFECT: improved shock absorbing properties of hammer.

3 cl, 2 dwg

 

The invention relates to pneumatic hammers with the cushioning device and is intended for chipping and Stripping castings, riveting and other works.

Pneumatic hammer with a shock-absorbing device includes a handle and a housing mounted in the casing body with vozduhopotok connection with the possibility of axial movement, the depreciation spring. Between the handle and the casing is placed a sleeve forming with arm air cushioning chamber, which includes vozduhoprovodyaschih nozzle body, trailing mounted in the sleeve, and the shock-absorbing spring mounted on the body of the hammer in the casing between the shoulders, made respectively on the housing and the cover.

In the hub of the hammer made a cavity in which is placed a ring with lip seal (rubber), and the nozzle housing ov included in this ring.

The technical result - improved cushioning properties hammer, improving the effectiveness of vibration absorption.

The invention relates to pneumatic hammers with cushioning device and can be used in mining, construction, foundries, shipbuilding and other industries.

Known pneumatic hammer is isolated from vibration arm in RF patent No. 2028926, class B 25 D 17/24, 1989, comprising a housing and is whatchu, United telescopically with the formation of an air chamber, a pneumatic percussion mechanism located in the housing, in which the handle is made a channel for the supply of compressed air in the channel is starting valve, and the outer housing is fixed limiter longitudinal axial movement of the handle relative to the housing in the form of the clip.

A disadvantage of the known device is complicated and unreliable in operation due to the presence of the limiter longitudinal axial movements, reduced depreciation, insufficient damping of the vibration at the time of launch of the hammer to the work happen beats working hammer through the limiter longitudinal movement of the handle. The operator has to overcome significant (large) force pressing on the handle until the handle and the body will take a neutral position via air cushioning chamber.

Closest to the invention the technical nature of the achieved technical result is a pneumatic hammer with a shock-absorbing device according to A.S. 289897 class. B 25 D 9/14, 1969, taken as a prototype, containing the barrel and movable along the axial direction of the handle, which form air cushioning chamber constantly filled with compressed air, in which the mating surface the handle and barrel provided with a conical socket.

The disadvantage of this pneumatic hammer with a shock-absorbing device are reduced depreciation of property: the trunk is not in a neutral position relative to the arm, there is no opposing force to balance the trunk in the air cushioning chamber, therefore, fluctuations in operating the hammer is transmitted to the handle. At the time of launch of a hammer to work the operator must make significant efforts clicking on the handle, overcoming the resistance force damping and spring force acting on the barrel in the air cushioning chamber, which are both oriented in the same direction.

The technical result of the invention is to increase the effectiveness of vibration absorption, improving the cushioning properties of a hammer.

The technical result is achieved in that the pneumatic hammer with a shock-absorbing device containing the handle and the casing installed in the casing body with vozduhopotok connection with the possibility of axial movement, the depreciation spring, in which between the handle and the casing is placed a sleeve forming with arm air cushioning chamber, which includes vozduhoprovodyaschih nozzle body, trailing mounted in the sleeve, and the shock-absorbing spring mounted on the body of the hammer in the casing between the shoulders, made according to the public on the body and the shroud.

In the hub of the hammer made a cavity in which is placed a ring with a sealing lip installed on it, and the socket housing ov included in this ring.

The presence of these distinctive characteristics determines that the proposed technical solutions to the criterion "novelty".

The invention is illustrated by drawings, where figure 1 is a schematic representation of a pneumatic hammer with a shock-absorbing device, a longitudinal section; figure 2 - the hammer ring and the sealing lip.

Pneumatic hammer with a shock-absorbing device comprises a handle 1 and a cover 2 mounted in the casing 2 housing 3 with vozduhopotok pipe 4 and the collar 5 with the possibility of axial movement, the depreciation spring 6 mounted on the housing 3 in the casing 2 between the collar 5 of the housing 3 and the collar 7, performed on the casing 2. Between the handle 1 and the casing 2 is posted sleeve 8 forming with the arm 1 air cushioning chamber 9, which includes vozduhoprovodyaschih pipe 4, ov mounted in the sleeve 8.

In the sleeve 8 is made of the cavity 10, in which is placed a ring 11 with the outer sealing lip 12, and the nozzle 4 of the housing 3 ov installed in the ring 11.

Pneumatic hammer with a shock-absorbing device operates as follows.

When turning on the hammer compressed air fills in susnow cushioning chamber 9, under the action of compressed air on the cross-sectional area of the pipe 4 case 3 moves down, acting by a collar 5 on the depreciation spring 6, and will take a neutral position in the casing 2, at the moment when the forces acting on the body 3 at the top and bottom, will be counterbalanced. Next of air cushioning chamber 9 through the channel 13 of the socket 4, the compressed air enters the air-distributing mechanism 14, which provides the reciprocating motion of the striker 15 in the housing 3. Thus fluctuations in the housing 3 near the neutral position relative to the handle 1 with the cover 2 is not transmitted to the operator's hands.

1. Pneumatic hammer with a shock-absorbing device that contains a handle, a casing, a housing mounted in the casing, an air cushioning chamber and depreciation spring, characterized in that between the handle and the casing is placed a sleeve, which is mounted for movement vozduhoprovodyaschih pipe, air cushioning chamber is formed by the handle and sleeve, and the shock-absorbing spring mounted between collars made on the housing and the cover.

2. Pneumatic hammer according to claim 1, characterized in that the sleeve is made cavity in which is placed a ring with a sealing lip, with vozduhoprovodyaschih pipe placed in the ring.

3. Pneumatically the hammer according to claim 2, characterized in that the seal ring is made of rubber.



 

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