CN216589387U

CN216589387U - Middle cylinder assembly of hydraulic breaking hammer

Info

Publication number: CN216589387U
Application number: CN202123435826.5U
Authority: CN
Inventors: 林雨才; 张真荣
Original assignee: Taizhou Belite Machinery Co ltd
Current assignee: Taizhou Belite Machinery Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-05-24
Anticipated expiration: 2031-12-29

Abstract

The utility model provides a well cylinder assembly of hydraulic breaking hammer belongs to quartering hammer technical field. The middle cylinder body cylinder pulling device solves the technical problems that a middle cylinder body of an existing hydraulic breaking hammer pulls a cylinder and the like. The middle cylinder body assembly of the hydraulic breaking hammer comprises a middle cylinder body and a piston, wherein the piston is installed in a piston hole and can move up and down in the axial direction relative to the middle cylinder body, the piston comprises a first piston part and a second piston part, a step surface is arranged at the joint of the second piston part and the first piston part, a working cavity is arranged between the inner wall of the middle cylinder body and the outer peripheral surface of the first piston part, a protection groove is formed in the inner wall of the middle cylinder body, when the piston beats a drill rod, the protection groove is communicated with the working cavity, and the step surface is located at the opening of the protection groove. The utility model discloses can prevent that well cylinder body from drawing the jar.

Description

Middle cylinder assembly of hydraulic breaking hammer

Technical Field

The utility model belongs to the technical field of the quartering hammer, refer in particular to a well cylinder assembly of hydraulic pressure quartering hammer.

Background

The hydraulic breaking hammer is a high-efficiency breaking machine tool for converting hydraulic energy into mechanical impact energy, can effectively expand the function of a host machine serving as bearing equipment, and is widely applied to railways, roads, mines, water conservancy projects, national defense projects and municipal construction projects.

The working principle of the hydraulic breaking hammer is as follows: the hydraulic breaking hammer comprises a front cylinder body, a middle cylinder body, a rear cylinder body, a drill rod, a piston and a reversing valve. During the stroke, high-pressure hydraulic oil is fed into a rear cavity of a cylinder body in the breaking hammer, and a piston impacts a drill rod to cut rock under the combined action of compressed nitrogen and the high-pressure oil in the rear cylinder body; during return stroke, the front cavity of the middle cylinder body is communicated with high-pressure oil to push the piston to move backwards and compress nitrogen in the rear cylinder body, so that a working cycle is completed. The piston is repeatedly stroked and returned to make the drill rod impact and break rock, stone and concrete.

At present, for example, in a hydraulic breaking hammer including a middle cylinder body with the application number of 201620837188.X, a piston in the hydraulic breaking hammer is subjected to the action of nitrogen and hydraulic oil to continuously perform reciprocating motion in the middle cylinder body to do work outwards, so that the purpose of breaking a target object is achieved. When the piston moves downwards rapidly, the piston and the drill rod collide violently, the piston shakes due to collision and then collides with the middle cylinder body, so that the middle cylinder body pulls the cylinder, and the service life of the breaking hammer is shortened seriously.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to provide a well cylinder assembly of hydraulic breaking hammer of cylinder is drawn to well cylinder body in preventing.

The purpose of the utility model can be realized by the following technical proposal:

the middle cylinder body assembly of the hydraulic breaking hammer comprises a middle cylinder body and a piston, wherein a piston hole used for accommodating the piston is formed in the middle cylinder body, the piston is installed in the piston hole and can move up and down in the axial direction relative to the middle cylinder body, the piston comprises a first piston part and a second piston part, the diameter of the second piston part is larger than that of the first piston part, a step surface is arranged at the joint of the second piston part and the first piston part, a working cavity is formed between the inner wall of the middle cylinder body and the outer peripheral surface of the first piston part, a protection groove is formed in the inner wall of the middle cylinder body, the protection groove is communicated with the working cavity when the drill rod is beaten by the piston, and the step surface is located at the opening of the protection groove.

The protection groove that well cylinder body inner wall set up, when the piston beaten the drill rod, protection groove and working chamber intercommunication, be full of hydraulic oil in the protection groove, when the piston rapid downstream and the violent collision of drill rod emergence, because the shake can take place for the piston, the outer peripheral face junction of step face and piston two parts can collide with well cylinder body inner wall, because the step face is located the protection groove opening part, the protection groove provides a space that can hold the shake, the outer peripheral face junction of step face and piston two parts can not hit well cylinder body inner wall, and hydraulic oil can eliminate or partly eliminate the shake of piston, reduce the cylinder that draws between piston and the well cylinder body, be favorable to increasing the life of well cylinder body, increase hydraulic breaking hammer's stability.

Furthermore, the upper groove wall of the protection groove is inclined to the inner wall of the middle cylinder body, and an included angle alpha between the upper groove wall and the inner wall of the middle cylinder body is an obtuse angle.

The groove bottom of the protection groove is narrower than the groove opening, so that the included angle alpha between the upper groove wall and the inner wall of the middle cylinder body is an obtuse angle, hydraulic oil can smoothly enter the protection groove from the working cavity, the timely supplemented hydraulic oil can eliminate or partially eliminate the shaking of the piston, and the cylinder pulling between the piston and the middle cylinder body is reduced.

Further, the included angle α is 120 ° to 160 °.

To prevent the notch of the protection groove from being too large and affecting the normal operation of the protection groove, it is preferable that the inclination angle α of the protection groove is 120 °, 135 ° and 150 °.

Furthermore, the connection part of the upper groove wall of the protection groove and the inner wall of the middle cylinder body is a fillet. The piston can be smoother in the return stroke.

Furthermore, the lower groove wall of the protection groove is inclined to the inner wall of the middle cylinder body, and an included angle beta between the lower groove wall and the inner wall of the middle cylinder body is an obtuse angle.

The groove bottom of the protection groove is narrower than the groove opening, so that the included angle beta between the lower groove wall and the inner wall of the middle cylinder body is an obtuse angle, the space of the protection groove is increased, the inflow of hydraulic oil is increased, the hydraulic oil can eliminate or partially eliminate the shaking of the piston, the cylinder pulling between the piston and the middle cylinder body is reduced, and the piston can be more smooth in the stroke.

Further, the included angle β is 120 ° to 160 °.

To prevent the notch of the protection groove from being too large and affecting the normal operation of the protection groove, it is preferable that the protection groove has an inclination angle β of 120 °, 135 °, and 150 °.

Furthermore, the connection part of the lower groove wall and the inner wall of the middle cylinder body is a fillet. The piston can be more smooth in the stroke.

Further, the piston comprises a first piston part, a second piston part, a third piston part, a fourth piston part and a fifth piston part, the diameters of the second piston part and the fourth piston part are the same, and the diameters of the second piston part and the fourth piston part are larger than the diameters of the first piston part, the third piston part and the fifth piston part.

There is the working chamber between the cylinder body in the piston one and, the outer peripheral face of piston two and piston four leans on with the inner wall of well cylinder body, and the diameter of piston three outer peripheral face is less than the outer peripheral face diameter of piston two and piston four, has the signal hole between piston three and the well cylinder body, and the signal hole can control the switching-over valve switching-over, and five portions of piston are sealed through sealing member and well cylinder body, prevent that hydraulic oil from revealing.

Compared with the prior art, the utility model discloses a technological effect does:

the utility model discloses a set up the protection groove, provide a space that can hold the shake for the piston, when the piston is rapid downstream and the drill rod takes place violent collision, hydraulic oil can be smooth enter into the protection groove from the working chamber in, the shake of piston can be eliminated or partly eliminated to hydraulic oil, and then reduces the cylinder that draws between piston and the well cylinder body, is favorable to increasing the life of well cylinder body, increases the stability of hydraulic pressure quartering hammer.

Drawings

Fig. 1 is a cross-sectional view of the middle cylinder, piston, front cylinder and drill rod of the present invention.

Fig. 2 is a sectional view of the cylinder assembly of the present invention.

Fig. 3 is an enlarged view of a-a in fig. 2 according to the present invention.

Fig. 4 is a sectional view of the middle cylinder of the present invention.

Marking the figure number: 1. a middle cylinder body; 2. a piston; 3. a piston bore; 4. a piston portion; 5. a second piston part; 6. a step surface; 7. a working chamber; 8. a protective groove; 9. a drill rod; 10. a lower tank wall; 11. a piston III; 12. a piston four part; 13. a piston five part; 14. and (4) an upper groove wall.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

The middle cylinder assembly of the hydraulic breaking hammer shown in fig. 1 to 4 comprises a middle cylinder 1 and a piston 2, wherein a piston hole 3 for accommodating the piston 2 is formed in the middle cylinder 1, the piston 2 is installed in the piston hole 3 and can move up and down in the axial direction relative to the middle cylinder 1, the piston 2 comprises a first piston part 4 and a second piston part 5, the diameter of the second piston part 5 is larger than that of the first piston part 4, a step surface 6 is arranged at the joint of the second piston part 5 and the first piston part 4, a working cavity 7 is formed between the inner wall of the middle cylinder 1 and the outer peripheral surface of the first piston part 4, a protection groove 8 is formed in the inner wall of the middle cylinder 1, when the piston 2 beats a drill rod 9, the protection groove 8 is communicated with the working cavity 7, and the step surface 6 is positioned at the opening of the protection groove 8. The utility model discloses inner wall at well cylinder body 1 has set up protection groove 8, make step face 6 be located protection groove 8 opening part, when piston 2 rapid downstream and drill rod 9 take place violent collision, piston 2 can produce the shake, the right angle top of the outer peripheral face junction of step face 6 and piston two 5 touches well cylinder body 1's inner wall easily, cause well cylinder body 1 to draw the jar, the right angle of the outer peripheral face junction of present step face 6 and piston two 5 is located protection groove 8 opening part, in addition protection groove 8 and working chamber 7 intercommunication, hydraulic oil gets into protection groove 8, eliminate or the part has eliminated piston 2's shake through protection groove 8 and hydraulic oil, reduce the jar that draws between piston 2 and the well cylinder body 1, be favorable to increasing well cylinder body 1's life, increase hydraulic breaking hammer's stability.

The upper groove wall 14 of the protection groove 8 is inclined to the inner wall of the middle cylinder body 1, and the included angle alpha between the upper groove wall 14 and the inner wall of the middle cylinder body 1 is an obtuse angle. The included angle alpha is 120-160 deg. The connection part of the upper groove wall 14 of the protective groove 8 and the inner wall of the middle cylinder body 1 is a rounded corner. The groove bottom of the protective groove 8 is narrower than the groove opening, so that the included angle alpha between the upper groove wall 14 and the inner wall of the middle cylinder body 1 is an obtuse angle, hydraulic oil can smoothly enter the protective groove 8 from the working cavity 7, the timely supplemented hydraulic oil can eliminate or partially eliminate the shaking of the piston 2, and the cylinder pulling between the piston 2 and the middle cylinder body 1 is reduced. Preferably, the inclination angle α of the above-mentioned protection groove 8 is 120 °, 135 ° and 150 °.

The lower groove wall 10 of the protection groove 8 is inclined to the inner wall of the middle cylinder body 1, and an included angle beta between the lower groove wall 10 and the inner wall of the middle cylinder body 1 is an obtuse angle. The connection part of the lower groove wall 10 and the inner wall of the middle cylinder body 1 with the included angle beta of 120-160 degrees is a rounded corner. The groove bottom of the protection groove 8 is narrower than the groove opening, so that the included angle beta between the lower groove wall 10 and the inner wall of the middle cylinder body 1 is an obtuse angle, the space of the protection groove 8 is increased, the inflow of hydraulic oil is increased, the shaking of the piston 2 can be eliminated or partially eliminated by the hydraulic oil, the cylinder pulling between the piston 2 and the middle cylinder body 1 is reduced, and the piston 2 can be more smooth in the stroke. Preferably, the inclination angle β of the above-mentioned protection groove 8 is 120 °, 135 °, and 150 °.

The piston 2 comprises a first piston part 4, a second piston part 5, a third piston part 11, a fourth piston part 12 and a fifth piston part 13, the diameters of the second piston part 5 and the fourth piston part 12 are the same, and the diameters of the second piston part 5 and the fourth piston part 12 are larger than the diameters of the first piston part 4, the third piston part 11 and the fifth piston part 13.

A working cavity 8 is arranged between the first piston part 4 and the middle cylinder body 1, the peripheral surfaces of the second piston part 5 and the fourth piston part 12 are abutted against the inner wall of the middle cylinder body 1, the diameter of the peripheral surface of the third piston part 11 is smaller than that of the peripheral surfaces of the second piston part 5 and the fourth piston part 12, a signal hole is arranged between the third piston part 11 and the middle cylinder body 1, the signal hole can control the reversing valve to reverse, and the fifth piston part 13 is sealed with the middle cylinder body 1 through a sealing element to prevent hydraulic oil from leaking.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a well cylinder body assembly of hydraulic breaking hammer, includes well cylinder body (1) and piston (2), be equipped with in well cylinder body (1) and be used for holding piston (2) piston hole (3), piston (2) are installed in piston hole (3) and can reciprocate in the axial centering cylinder body (1), piston (2) are including piston one (4) and piston two (5), piston two (5) diameter is greater than piston one (4) diameter, and there is step face (6) piston two (5) and piston one (4) junction, working chamber (7) have between the inner wall of well cylinder body (1) and the outer peripheral face of piston one (4), its characterized in that: the inner wall of the middle cylinder body (1) is provided with a protection groove (8), when the piston (2) beats the drill rod (9), the protection groove (8) is communicated with the working cavity (7), and the step surface (6) is positioned at the opening of the protection groove (8).

2. The middle cylinder assembly of a hydraulic demolition hammer as set forth in claim 1, wherein: the upper groove wall (14) of the protection groove (8) is inclined to the inner wall of the middle cylinder body (1), and an included angle alpha between the upper groove wall (14) and the inner wall of the middle cylinder body (1) is an obtuse angle.

3. A middle cylinder assembly of a hydraulic breaking hammer according to claim 2, wherein: the included angle alpha is 120-160 degrees.

4. A middle cylinder assembly of a hydraulic breaking hammer according to claim 2 or 3, wherein: the connection part of the upper groove wall (14) of the protection groove (8) and the inner wall of the middle cylinder body (1) is a rounded corner.

5. A middle cylinder assembly of a hydraulic breaking hammer according to claim 1 or 2, wherein: the lower groove wall (10) of the protection groove (8) is inclined to the inner wall of the middle cylinder body (1), and an included angle beta between the lower groove wall (10) and the inner wall of the middle cylinder body (1) is an obtuse angle.

6. The middle cylinder assembly of a hydraulic demolition hammer as set forth in claim 5, wherein: the included angle beta is 120-160 degrees.

7. The middle cylinder assembly of a hydraulic demolition hammer as set forth in claim 6, wherein: the joint of the lower tank wall (10) and the inner wall of the middle cylinder body (1) is a fillet.

8. The middle cylinder assembly of a hydraulic demolition hammer as set forth in claim 1, wherein: the piston (2) comprises a first piston part (4), a second piston part (5), a third piston part (11), a fourth piston part (12) and a fifth piston part (13), the diameters of the second piston part (5) and the fourth piston part (12) are the same, and the diameters of the second piston part (5) and the fourth piston part (12) are larger than the diameters of the first piston part (4), the third piston part (11) and the fifth piston part (13).