CN203431154U

CN203431154U - Split type outer lining structure of lower cylinder body of hydraulic hammer

Info

Publication number: CN203431154U
Application number: CN201320358817.7U
Authority: CN
Inventors: 何万满; 杨海波; 黄诚
Original assignee: Hefei Zhongda Machinery Manufacturing Co Ltd
Current assignee: Hefei Zhongda Machinery Manufacturing Co Ltd
Priority date: 2013-06-21
Filing date: 2013-06-21
Publication date: 2014-02-12
Anticipated expiration: 2023-06-21

Abstract

The utility model relates to a lining outside a cylinder body, especially to a split type outer lining structure of a lower cylinder body of a hydraulic hammer. The utility model relates to a lining outside a cylinder body, especially to a split type outer lining structure of a lower cylinder body of a hydraulic hammer. The inner and outer sides of a master sleeve are each provided with a carburizing layer, the depth of the carburizing layer is 0.8-1.2mm, the quenching hardness of the carburizing layer of the master sleeve is HRC 58-62, and the quenching hardness of the carburizing layer of a sub-sleeve is HRC 54-58. The master sleeve and the sub-sleeve are made of different materials, and the split type outer lining structure is excellent in toughness. The wear resistance of a wearing position is substantially enhanced, and the use time is doubled. When the sub-sleeve reaches the wearing limit, a combined outer lining structure can be dismounted entirely from the lower cylinder body, and the sub-sleeve can be replaced. The split type outer lining structure is simple in design, and convenient for use, prolongs the use time, reduces shutdown replacing time, and reduces the weight of the sub-sleeve. The split type outer lining structure is low in cost, increases customer benefit and minimizes energy consumption.

Description

The split type external bushing structure of hydraulic breaking hammer lower cylinder body

Technical field

The utility model relates to a kind of cylinder body external bushing, especially relates to the split type external bushing structure of a kind of hydraulic breaking hammer lower cylinder body.

Background technique

Hydraulic breaking hammer cut into a mountain and urban infrastructure in be widely used, inside and outside lining on its lower cylinder body belongs to easily damaged parts, its external bushing wearing and tearing surpass 5mm just should change (the actual use of client is just changed in 10mm left and right), the useless part loss of weight of changing only 5～15%, caused great waste of material, also increase client's user cost, affected the use of product.

Summary of the invention

For overcoming the deficiencies in the prior art part, the utility model provides a kind of hydraulic breaking hammer lower cylinder body split type external bushing structure, extends the service time of external bushing, reduces and shuts down the replacing time.

The technological scheme that the utility model technical solution problem adopts is: the split type lower cylinder body external bushing structure of hydraulic breaking hammer, this external bushing structure comprises a pair of by sub-set and the mother set of nested mode interference fit, described sub-set is columnar structured, its front end is provided with extension limit, it is inner that described extension limit is positioned at described mother set, and its external diameter is greater than described mother set internal diameter.

Further, described extension limit has at least three screws, is screwed into bolt when changing sub-set.The effect of bolt is to be convenient to take out sub-set.

Further, in described mother set, outside is provided with carburized case, this case depth 0.8～1.2mm.

The quenching hardness of described mother set carburized case is HRC58～62.

Further, the quenching hardness of described sub-set is HRC54～58.

Beneficial effect: the inventor is in order to reduce user cost, quartering hammer lower cylinder body external bushing is designed to split formula structure, and mother set and sub-set adopt two kinds of different materials, make it good toughness, also greatly strengthened the wear resistance of abrading section, extended working time more than one times.When sub-set reaches wear limit, this combined type external bushing integral body is pulled down from lower cylinder body, after the sub-set more renewing.The utility model external bushing split project organization is simple, easy to use, extends working time, and reduces and shuts down the replacing time; Sub-set is lightweight simultaneously, and price is low, increases client's benefit, reduces energy consumption.

Accompanying drawing explanation

The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is the structural drawing that partly cuts open of the present utility model,

Fig. 2 be in Fig. 1 M to view,

Fig. 3 is mounting point of the present utility model schematic diagram,

Fig. 4 be in Fig. 3 K to structure perspective view,

Fig. 5 is the structural representation of the utility model fixed structure,

Fig. 6 is screwed into the schematic diagram of bolt while changing sub-set.

Embodiment

Below in conjunction with accompanying drawing, by embodiment, the utility model is further described.

Embodiment 1:

Referring to Fig. 1～4, the split type lower cylinder body external bushing structure of hydraulic breaking hammer, comprise a pair of sub-set 1, the mother set 2 of nested mode interference fit passed through, sub-set 1 is assembled into one with mother set 2 with more accurate Spielpassung, and is axially only having very little gap with lower cylinder body 3 simultaneously.Wherein mother set 2 outer ends are provided with flange, and sub-set 1 is columnar structured, and its front end is provided with extension limit, and extension limit is positioned at mother set 2 the inners, and its external diameter is greater than mother set 2 internal diameters.Referring to Fig. 2, extension limit has three screws, for construction bolt 8.

Referring to Fig. 5, mother set 2 outsides position by backing pin 5, and backing pin 5 outsides pack successively rubber stopper 6 into and hole is fixed with ring washer 7.

In actual use, the whole axial motion of external bushing is controlled, because of drill steel 4 and sub-set 1 friction heat production, leads expansion, and due to temperature difference effect, sub-set 1 forms interference fit with mother set 2.

When sub-set 1 wearing and tearing reach capacity, take off ring washer 7 for hole, tap backing pin 5 and rubber stopper 6, bush assembly is taken out from lower cylinder body 3, in the tapped hole of sub-set 1, be screwed into bolt 8(referring to Fig. 6), by reaction force, sub-set 1 can be taken out, the sub-set more renewing reinstalls.

The thickness of sub-set 1 material, material is different from mother set 2, and sub-set 1 need be through Overheating Treatment, and integral hardness is high, and quenching hardness reaches HRC54～58.Thereby wear resistance is good, increases the service life.Mother set 2 surface hardnesses are greater than sub-set 1 hardness, when installing, changing, can better protect mother set 2.

Mother set 2 adopts carburizing heat treatment, interior outside Carburization Treatment, and case depth 0.8～1.2mm, its surface hardness is high, and carburized case quenching hardness reaches HRC58～62, and overall flexibility is good, repeatedly reusable.

The utility model assembly process is as follows:

1. before dress, at mother set 2 fitting surfaces, evenly smear a small amount of hydraulic oil;

2, be press fit into a half, in sub-set 1 cylindrical surrounding, coat a small amount of butter, to design position, space after guaranteeing to be press-fit into place, have enough butter, to prevent secondary dismounting difficulty.

3, in three tapped holes, fill up butter after assembling, antirust, packing.

Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that not departing from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiments, scope of the present utility model is limited by claims and equivalent thereof.

Claims

1. the split type lower cylinder body external bushing structure of hydraulic breaking hammer, it is characterized in that: this external bushing structure comprises a pair of by sub-set and the mother set of nested mode interference fit, described sub-set is columnar structured, its front end is provided with extension limit, it is inner that described extension limit is positioned at described mother set, and its external diameter is greater than described mother set internal diameter.

2. the split type lower cylinder body external bushing structure of hydraulic breaking hammer according to claim 1, is characterized in that: described extension limit has at least three screws, is screwed into bolt when changing sub-set.

3. the split type lower cylinder body external bushing structure of hydraulic breaking hammer according to claim 1, is characterized in that: in described mother set, outside is provided with carburized case, this case depth 0.8～1.2mm.

4. the split type lower cylinder body external bushing structure of hydraulic breaking hammer according to claim 3, is characterized in that: the quenching hardness of described mother set carburized case is HRC58～62.

5. the split type lower cylinder body external bushing structure of hydraulic breaking hammer according to claim 1, is characterized in that: the quenching hardness of described sub-set is HRC54～58.