CN201871390U

CN201871390U - Novel oil circuit of hydraulic breaking hammer and structure

Info

Publication number: CN201871390U
Application number: CN2010205553164U
Authority: CN
Inventors: 张晓葆
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-30
Filing date: 2010-09-30
Publication date: 2011-06-22
Anticipated expiration: 2020-09-30

Abstract

The utility model discloses a novel oil circuit of a hydraulic breaking hammer and a structure. The main machine part mainly comprises four main parts of a nitrogen chamber, a middle cylinder body assembly, a lower cylinder body assembly and a drill rod, which is characterized in that: an external reversing valve structure is adopted; the reversing valve is combined by a valve seat, a valve core and a valve cover; the reversing valve which has the least component and the simplest structure exists in the existing reversing valve; the three pieces are clamped one time to finish grinding; the precision of the reversing valve is easily ensured than that of the previous two structures. Meanwhile, two main oil ducts (except the reversing valve hole) on the middle cylinder body are arranged, wherein one is arranged on the front surface and the other is arranged on the rear surface. The connecting surface of the reversing valve and the middle cylinder body is provided with only four oil holes (except eight thread holes) which are communicated with each other. The sealing requirement is relatively small. With the adoption of the design, the above problem is completely solved.

Description

Hydraulic breaking hammer novel oilway and structure

Technical field:

This patent relates to the hydraulic tool field in the engineering machinery, relates in particular to hydraulic breaking hammer novel oilway and structure.

Background technology:

Hydraulic breaking hammer (destroyer) is a kind of hydraulic tool that is under the jurisdiction of engineering machinery; It is mounted on the engineering machinery and (mainly is loaded on the excavator), the destructive instrument that the high frequency that is driven by the hydraulic system of engineering machinery back and forth impacts.Quartering hammer power source useless itself is the loss instrument that can independently install, independently store, independently keep in repair, independently transport.In the last few years, raising along with efficiency, labour intensity and labor safety requirement, the demand of quartering hammer in projects such as various urban construction, engineering construction and mining is increasingly extensive, demand is also increasing year by year, at present, both at home and abroad the operation principle of hydraulic breaking hammer is basic identical, is divided into built-in and external two kinds according to the deployment scenarios of reversal valve.On the market mainly based on Japan and Korea S.'s type.At present, domestic production mainly also be these two series of products, and be many with Korea S's technology.

Summary of the invention:

Goal of the invention of the present utility model: solve in above-mentioned two kinds of structures and have complex structure, difficulty of processing is big, and the parts precision be cannot say for sure the problem demonstrate,proved.Above-mentioned built-in complex structure, middle cylinder body is eccentric serious, reversal valve parts accuracy guarantee difficulty, the numerous and difficult processing of oil duct and oilhole.Above-mentioned external oil duct is numerous, and oil circuit disperses complicated, and seal requires many, reversal valve parts accuracy guarantee difficulty.

The purpose of this utility model realizes by following technology: external reversal valve structure, the reversal valve combination is made up of valve seat, spool, valve gap.The design has adopted external reversal valve structure, but with Japanese external the difference of essence is arranged on oil duct and structure.The reversal valve combination is made up of valve seat, spool, valve gap, is that parts are minimum in the present reversal valve, and structure is the most succinct, all can finish by a clamping all easier assurance of the more preceding two kinds of structures of its precision for three with regard to grinding.Simultaneously, the main oil gallery on the middle cylinder body (removing the commutation valve opening) has only 2, one of front, one at back (not showing).Reversal valve and middle cylinder body joint face have only 4 oilholes (remove 8 screwed holes) to link, relatively little many of seal request.

Description of drawings:

Fig. 1 is the design's a novel middle cylinder structure

Fig. 2 is main hydraulic breaking hammer for the built-in reversal valve of Korea Spro's formula

Fig. 3 is main hydraulic breaking hammer for Japanese external reversal valve

Fig. 4 is the novel oilway and the structure (cylinder assembly in novel) of this patent

The specific embodiment:

As shown in Figure 1, it is the host machine part of hydraulic breaking hammer, is the main working parts body, divides nitrogen chamber 1, middle cylinder assembly 2, lower cylinder body assembly 3,4 four major parts of drill steel.Middle cylinder assembly is most crucial part, its major decision the performance and the quality of this product, it is mainly combined by middle cylinder body, piston, reversing valve assembly, belongs to that high-frequency moves back and forth, the parts of high impact forces, for making and the requirement of accuracy guarantee is that this product is the highest.

As Fig. 2 (middle cylinder assembly), it is built-in, with Korea S water mountain is representative, its compact conformation, oil-feed interface 5 and oil return interface 6 are on middle cylinder body 2, main oil gallery has 4, be respectively and main oil gallery 7, No. two main oil gallerys 8, No. three main oil gallerys 9, No. four main oil gallerys 10, oil circuit UNICOM fabrication hole numerous (all not showing among the figure), and these holes are all mostly with respect to outer surface to be angling holes, distribute and relatively disperse, and the space anxiety makes most fabrication holes can only take to weld stifled mode to realize sealing, thereby formed blind hole, be not easy to cleaning work.Because compact conformation, the status requirement of main oil gallery is higher relatively, and oil duct is can not arbitrarily adjust the position to realize its vertical processing with oilhole mostly in these thereby make, and also causes difficulty of processing to strengthen, and equipment is had relatively high expectations.Because valve opening 11 all need advance Precision Machining such as grinding with the piston mating holes, size and shape need are higher, process valve opening or piston mating holes workpiece all has bigger off-centre.Because reversal valve divides valve pocket 12, spool (high frequency motion spare) 13, valve gap 14 3 parts, three's precision is higher, and all need grinding inside and outside valve pocket 12 and the valve gap 14, can not realize all that separately a clamping just machines, its form and position tolerance just is difficult to guarantee, processed complex, the cycle is longer, and it is bigger influenced by human factor; Because valve opening 11 itself just cannot say for sure to demonstrate,prove precision, and after cooperating, the reversal valve three-piece more cannot say for sure to demonstrate,prove precision, the abnormal situation of the work that is prone to.In sum, though this kind series is compact, the internal structure complexity, difficulty of processing is big, equipment is required height, can not separate synchronous processing, the process-cycle is long, the relative difficulty of product accuracy guarantee is bigger, and it is also bigger influenced by human factor, processing have high input and energy consumption higher.

As Fig. 3 (middle cylinder assembly), it is an external, is representative with the Furukawa Electronic, and it is external with reversal valve by the mode that increases valve seat 16, and uses bolt to connect multiple seal with O ring composition surface.Compare with built-in, though it is not very compact, it is divided into two bodies with valve opening 11 and piston 15 holes, independent separately processing.In cylinder body owing to there has not been a valve opening 11, little many of parts offset during piston 15 hole grindings are than being easier to guarantee precision.Valve seat 16 independent processing, offset is minimum, and valve opening 11 precision easily guarantee.Both off-centre is less, all can carry out independent processing, equipment is required also to reduce low, and efficient improves, and energy consumption is relatively low.But, showing that from figure it also has 4 main oil gallerys, valve seat 16 exists 7 oilholes (except that eight screwed holes 17) to dock with cylinder body junction face.Because reversal valve is made up of valve pocket (high frequency motion spare) 12, spool 13, valve gap 14 threes, and all needs grinding inside and outside the valve pocket 12, it can't realize that a clamping just machines, form and position tolerance is difficult to guarantee, processed complex, the cycle is longer, and it is bigger influenced by human factor; Because the related size of working in coordination inside and outside between valve seat 16, valve pocket 12, spool 13, valve gap 14 4 is more, the accuracy guarantee difficulty is big, the abnormal situation of the work that is prone to.In sum, though this kind external has solved the large eccentricity problem in built-in middle valve opening 11 and the processing of piston 15 mating holes, make the piston hole precision be easier to guarantee; But the combination of its external valve is than built-in complexity, and card is still comparatively cannot say for sure in fit ons in the valve pocket 12, and oil duct is still numerous, valve seat and middle cylinder body to be connected oilhole numerous, the seal request between the connection oilhole is many, processing dimension is numerous, processes also very consuming time.Simultaneously, oil-feed and oil return interface are connected to nitrogen chamber (this figure does not show) by No. two oil ducts 8 and No. four oil ducts 10 and realize that the junction must guarantee sealing effectiveness, overall structure is complicated, guarantees that the precision difficulty is still bigger, overall processed complex, cycle is longer, drops into also greatly, and it is more to consume energy.

As shown in Figure 4, the core of this patent just, novel oilway and structure (cylinder assembly in novel).Similar a bit to the external of Japan on the profile, but its oil circuit, structure and operating principle and inequality, adopted the advantage that Fig. 2, Fig. 3 plant two kinds of structures, avoided both shortcomings.This structure has adopted external reversal valve structure, and its advantage exists together mutually with Japanese structure and no longer mentions.But essential difference is arranged on oil duct and structure with Japanese external.The reversal valve combination is made up of valve seat 16, spool 13, valve gap 14, is that parts are minimum in the present reversal valve, and structure is the most succinct, all can finish by a clamping all easier assurance of the more preceding two kinds of structures of its precision for three with regard to grinding.Simultaneously, 2 main oil gallery on the middle cylinder body (remove commutation valve opening) has only 9 two of No. two main oil gallerys 8 and No. three main oil gallerys, one of front, one at back (showing).Reversal valve and middle cylinder body joint face have only four oilholes (remove 8 screwed holes) to link, relatively little many of seal request.Compare with Japanese external oil circuit relatively concentrate compact, the design's success with oil-feed and oil return Interface design on valve seat, rather than on the nitrogen chamber, saved too much oil duct and be connected sealing, structure is relatively simply many.Because valve seat is less relatively, be convenient to concentrate processing, the production efficiency height, energy consumption is low.Middle cylinder-body oil duct is few, and it is few to connect oilhole, all can realize the vertical processing of oil duct and oilhole, thereby make processing easier, and efficient is higher, and energy consumption is lower.

In a word, the design has solved the defective of existing product, has developed their advantage, makes the parts accuracy guarantee easier, and structure is simpler, oil circuit still less, parts reduce, production efficiency improves, Energy Intensity Reduction.

Claims

1. hydraulic breaking hammer novel oilway and structure, host machine part mainly contains nitrogen chamber, middle cylinder assembly, lower cylinder body assembly, four major parts of drill steel, it is characterized in that, middle cylinder assembly is mainly combined by middle cylinder body, piston, reversing valve assembly, external reversal valve structure, the reversal valve combination is made up of valve seat, spool, valve gap.

2. hydraulic breaking hammer novel oilway as claimed in claim 1 and structure is characterized in that, external reversal valve structure, and the reversal valve combination is made up of valve seat, spool, valve gap.

3. hydraulic breaking hammer novel oilway as claimed in claim 1 and structure is characterized in that, the main oil gallery on the middle cylinder body has only two, one of front, one at back.

4. hydraulic breaking hammer novel oilway as claimed in claim 1 and structure is characterized in that, reversal valve and middle cylinder body joint face have only four oilholes to link.

5. hydraulic breaking hammer novel oilway as claimed in claim 1 and structure is characterized in that, oil-feed and oil return Interface design on valve seat, have been saved too much oil duct and have been connected sealing.