CN101712145A - Novel hand-held hydraulic hammer - Google Patents

Abstract

The invention discloses a novel hand-held hydraulic hammer, which is high pressure resistant, free of medium leakage, long in service life and high in hammering efficiency. Sealing technology that a seal ring body is extruded by a medium pressure from an inner chamber 8 of a hollow n-shaped seal ring 6 to be tightly adhered to a hammer rod 11 to realize sealing is adopted between upper and lower end covers 2 and 1 and the hammer rod 11 of a hydraulic transmission part of the hand-held hydraulic hammer. Because the inner chambers of the n-shaped seal ring 6 is hollow, the seal ring body of the n-shaped seal ring 6 of the hydraulic transmission part of the hand-held hydraulic hammer has slight friction with the hammer rod 11 and has low abrasion, and then the service life of the n-shaped seal ring 6 is prolonged; and the friction resistance between the seal ring body and the hammer rod 11 is low, so energy consumption for friction generation is low and the efficiency of hammering work is improved. The hand-held hydraulic hammer of the invention is free of medium leakage and multiply increased in the service life; a higher pressure can be borne than that of the traditional hand-held hydraulic hammer; and the efficiency of hammering work is improved.

Description

Novel hand-held hydraulic hammer

The present invention relates to engineering machinery field.

Hand-held hydraulic hammer is equipment in the engineering machinery field, and the operating frequency height of hand-held hydraulic hammer, dielectric leakage are the existing modal faults of hand-held hydraulic hammer.Trace sth. to its source, problem goes out on its Sealing Technology that adopts.As everyone knows, O shape circle, Yx shape circle and combined seal ring Sealing Technology thereof are adopted in the movable sealing of hydraulic drive part in the existing hand-held hydraulic hammer, in rubber seal Sealing Technologies such as O shape circle, Yx shape circle, working medium pressure makes it be adjacent to hydraulic hammer hydraulic drive part hammer stem and realizes sealing from sealing ring external compression sealing circle body.Hand-held hydraulic hammer when work, potted component with the relative motion of hydraulic hammer hydraulic drive part hammer stem in all be easy to be damaged, thereby dielectric leakage takes place; If working medium pressure is too high, potted component then can produce distortion, and medium passes through and mistake, and seal failure causes existing hand-held hydraulic hammer working life short, can not bear high pressure.Hammer body also to overcome when falling potted component in the hydraulic drive part and hydraulic hammer hydraulic drive part hammer stem between frictional resistance, make the hammering decrease in efficiency.Because the frictional force between potted component and the hydraulic hammer hydraulic drive part hammer stem is very big, for guaranteeing that everything goes well with your work, adopt the combined seal ring Sealing Technology, because combined seal ring costs an arm and a leg, higher to each component processing required precision, existing hand-held hydraulic hammer cost is significantly risen.Yet because its sealing mechanism is all the same basically with rubber seal Sealing Technologies such as O shape circle, Yx shape circles, sealing effectiveness is not very good yet, exists the dielectric leakage problem always, can not anti-very high pressure.

Purpose of the present invention be exactly to provide a kind of do not have dielectric leakage, high voltage bearing, long service life, novel hand-held hydraulic hammer that hammering efficient is high.

Technical scheme of the present invention is achieved in that

Between the hydraulic drive upper and lower end cap 2,1 and hammer stem 11 partly of hand-held hydraulic hammer, adopt pressure medium to make it be adjacent to the Sealing Technology that hammer stem 11 is realized sealing from the inner chamber 8 crush seal circle bodies of hollow sealing ring 6.

Be characterized in: the groove 3 that 1) some is arranged on the column working of the upper and lower end cap 2,1 of hand-held hydraulic hammer hydraulic drive part; Quantity is counted from zero, does not limit to requirement; 2) have a plurality of sealing ring mounting grooves on the column working of upper and lower end cap 2,1, the road is several to be required to decide according to processing performance, and quantity is not limit; 3) working face of sealing ring 6 both sides inboard and sealing ring constitute hollow cavity 8, because hollow sealing circle 6 cross sectional shapes are like n shape, so be called n shape sealing ring; 4) on the sealed working face of n shape sealing ring 6 boss 9 is arranged, boss 9 quantity are decided according to the service behaviour and the technical parameter of instructions for use, and quantity is counted from zero, do not limit to requirement; 5) have access opening 4 to lead to each sealing ring mounting groove on upper and lower end cap 2,1 end face, boot media enters the inner chamber 8 of n shape sealing ring 6, and access opening 4 can be shared, also can separate separately.6) according to the processing performance requirement, can adopt hollow n shape sealing ring 6 Sealing Technologies simultaneously between the upper and lower end cap 2,1 of hand-held hydraulic hammer hydraulic drive part and the hammer stem 11, also wherein a place adopts hollow n shape sealing ring 6 Sealing Technologies, and a place adopts other Sealing Technologies.

The invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is the cut-away view that adopts the novel hand-held hydraulic hammer of hollow n shape sealing ring 6 Sealing Technologies

Fig. 2 is the cut-away view of n shape sealing ring

The groove 3 that some as can be seen from Figure 1, is arranged on the column working of the upper and lower end cap 2,1 in the hand-held hydraulic hammer hydraulic drive part cylinder body 10; Have multiple-sealed circle mounting groove on the column working of the upper and lower end cap 2,1 in the hand-held hydraulic hammer hydraulic drive part cylinder body 10, n shape sealing ring 6 just is installed in the sealing ring mounting groove; The end face of upper and lower end cap 2,1 has some access openings 4 and each sealing ring mounting groove to be interconnected.Access opening 4 can be shared, also can separate separately.Access opening 4 can import medium the inner chamber 8 of n shape sealing ring 6.Bottom end cover 1 is provided with sealing guider 12, and upper end cover 2 is provided with sealing guider 13.

On n shape sealing ring 6 its sealed working faces among Fig. 2 boss 9 is arranged, boss 9 quantity are decided according to service behaviour such as the pressure of instructions for use and technical parameter, and quantity is counted from zero, do not limit to requirement.

As can be seen from Figure 1, by the oil circuit control lever 15 on the joystick 14 hand-held hydraulic hammer is started working, medium enters hydraulic drive part cylinder body 10 from following hydraulic fluid port, medium enters the inner chamber 8 of n shape sealing ring 6 via the end face access opening 4 of upper and lower end cap 2,1, be full of medium in n shape sealing ring 6 inner chambers 8, made n shape sealing ring 6 working faces be close to hammer stem 11.Pressure strengthens, pressure medium is reached the inner chamber 8 of n shape sealing ring 6 via the end face access opening 4 of upper and lower end cap 2,1 by medium, n shape sealing ring 6 is closely contacted with hammer stem 11, and the groove 3 on the column working of boss 9 on each road n shape sealing ring 6 sealed working face and upper and lower end cap 2,1 forms labyrinth seal, medium by the time pressure progressively decay, medium can not take place and pass through leakage phenomenon in the pressure medium less than the inner chamber 8 of n shape sealing ring 6, obtains fabulous sealing effectiveness.And pressure medium is big more, and the sealed working face of n shape sealing ring 6 sealed working faces and hammer stem 11 is fitted tight more, and sealing effectiveness always is fine, and hammer stem 11 moves up under pressure medium promotes.When hammer stem 11 rose to desired location, pressure medium flowed out through last hydraulic fluid port, and pressure medium descends rapidly, and the effect lower hammer 15 drive hammer stems 11 of compressing gasbag fall rapidly in upper cover body 7, and bang hammer pin 5 produces hammer actions.Since n shape sealing ring 6 inner chamber hollows, wearing and tearing and little in the impulse stroke.Simultaneously, pressure medium is that the crush seal circle body is realized sealing internally, and whole rubber seal is evenly stressed under the extruding of pressure medium, and deformation is very little, can not produce permanent deformation, and n shape sealing ring 6 working lives have obtained prolongation.And discharge from hydraulic drive part cylinder body at medium, hammer body 15 drives in the hammer stem 11 downlink working strokes, because n shape sealing ring inner chamber hollow, friction is slight between n shape sealing ring 6 sealing circle bodies and the hammer stem 11, it is very little to wear and tear, and this has also prolonged n shape sealing ring 6 working lives.Simultaneously, because frictional resistance is little between sealing circle body and the hammer stem 11, the friction energy loss of generation is little, has improved the efficient of hammering work.Hand-held hydraulic hammer of the present invention does not only have dielectric leakage, and working life is multiplied, and can bear the pressure higher than existing hand-held hydraulic hammer, has improved the efficient of hammering work.

Claims (7)

1. One kind do not have dielectric leakage, high voltage bearing, long service life, novel hand-held hydraulic hammer that hammering efficient is high.It is characterized in that: between the hydraulic drive upper and lower end cap 2,1 and hammer stem 11 partly of hand-held hydraulic hammer, adopt pressure medium to make it be adjacent to the Sealing Technology that hammer stem 11 is realized sealing from the inner chamber 8 crush seal circle bodies of hollow n shape sealing ring 6.
2. 2. the groove 3 that some is arranged on the column working of the upper and lower end cap 2,1 of hand-held hydraulic hammer hydraulic drive part according to claim 1
3. 3. have a plurality of sealing ring mounting grooves on the column working of the upper and lower end cap 2,1 of hand-held hydraulic hammer hydraulic drive part according to claim 1, the road is several to be required to decide according to processing performance, and quantity is not limit.
4. 4. the n shape sealing ring 6 that hand-held hydraulic hammer according to claim 1 adopts is installed in the sealing ring mounting groove.
5. 5. the end face of the upper and lower end cap 2,1 of hand-held hydraulic hammer hydraulic drive part according to claim 1 has some access openings 4 and each sealing ring mounting groove to be interconnected, and access opening 4 can be shared, also can separate separately
6. 6. the working face of n shape sealing ring 6 according to claim 4 both sides inboard and sealing ring constitute hollow cavity 8, have boss 9 on the sealed working face of sealing ring, and its quantity is counted from zero, do not limit to requirement.
7. 7. according to the Sealing Technology that can require adopt simultaneously hollow n shape sealing ring 6 between the upper and lower end cap 2,1 of the described hand-held hydraulic hammer hydraulic drive of claim 1 part and the hammer stem 11 according to processing performance, also wherein a place adopts the Sealing Technology of hollow n shape sealing ring 6, and another place adopts other Sealing Technologies.

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