Front cylinder body of breaking hammer

Abstract

A front cylinder body of a breaking hammer comprises a cylinder body, an outer sleeve and a flat pin, an inner sleeve is fixed in the cylinder body through a fixing structure, the fixing structure comprises a fixing pin, a pin shaft through hole and a rubber ring, the pin shaft through hole is formed in the cylinder body, a fixing groove is formed in one end of the pin shaft through hole, a rubber ring groove is formed in the inner wall of the fixing groove, and a fixing protruding ring is arranged on the peripheral wall of the fixing pin. The rubber gasket is characterized in that a force unloading groove is formed in the peripheral wall of the rubber gasket. After the upper force unloading groove is formed in the fixed rubber ring, when the fixed rubber ring is extruded, the two sides of the fixed rubber ring can disperse shearing force generated by extrusion towards the periphery, damage caused by single-side stress of the fixed rubber ring is avoided, the fixed rubber ring is more convenient to install and not prone to breakage during installation, and the service life of the rubber ring is prolonged.

Description

Technical Field

[0001] This patent relates to the technical field of breaker hammers, and in particular to a front cylinder body of a breaker hammer. Background Art

[0002] Hydraulic breaker is mainly used in conjunction with main machines such as excavators. In actual work, the piston of the hydraulic breaker accelerates to hit the drill rod, and the drill rod collides with the target object to achieve the crushing effect of the target object. The front cylinder body is the structure on the hydraulic breaker and is the connecting part between the piston and the drill rod.

[0003] The utility model with application number 2018210882685 discloses a front cylinder structure for a breaker hammer, including a breaker hammer cylinder, a breaker hammer cylinder through hole is provided in the breaker hammer cylinder, a drill rod pin is inserted in the breaker hammer cylinder, a thrust step groove and a countersunk step groove are provided on the through hole, a pin is provided in the through hole, and both ends of the pin are sealed with rubber sleeves.

[0004] It is found in practice that when installing the rubber ring, it must be knocked in from the outside. At this time, due to the large amount of compression when knocking in the rubber ring, it is easy to cause the rubber ring to break, causing the fixing pin to fall out. At this time, the outer sleeve, inner sleeve and flat pin lose the fixing effect of the fixing pin, affecting the normal use of the breaker. Summary of the invention

[0005] In view of the above problems, a front cylinder body of a breaker hammer is provided, in which a rubber ring is easy to install and is not easily broken during installation.

[0006] A front cylinder body of a breaker hammer comprises a cylinder body, an outer sleeve, a flat pin and an inner sleeve fixed in the cylinder body by a fixing structure, the fixing structure comprises a fixing pin, a pin shaft through hole and a rubber ring, the pin shaft through hole is arranged on the cylinder body, a fixing groove is arranged at one end of the pin shaft through hole, a rubber ring groove is arranged on the inner wall of the fixing groove, a fixing convex ring is arranged on the outer peripheral wall of the fixing pin, the fixing groove cooperates with the fixing convex ring, and is characterized in that a force unloading groove is arranged on the outer peripheral wall of the rubber ring.

[0007] The rubber ring is provided with an upper unloading groove to reduce the compression amount of the rubber ring during installation. When the rubber ring is squeezed, the two sides of the rubber ring can disperse the shear force generated by the squeezing to the surrounding areas, avoiding damage caused by unilateral force on the rubber ring, making the installation of the rubber ring more convenient, the rubber ring is not easy to break during installation, and the service life of the rubber ring is increased.

[0008] In the front cylinder body of the above-mentioned breaker hammer, a rubber ring groove is also provided at the other end of the pin shaft through hole, so that rubber rings can be provided on both ends of the fixing pin, which can better fix the fixing pin.

[0009] In the front cylinder of the above-mentioned breaker, the outer periphery of the side wall of the unloading groove is inclined toward the end of the rubber ring, so as to avoid the rubber ring from being broken and damaged due to excessive stress concentration.

[0010] In the front cylinder of the above-mentioned breaker, the unloading groove is arranged in the middle of the outer wall of the rubber ring, so that the rubber ring can disperse the shear force to the surroundings during installation and removal, making the installation and removal of the rubber ring more convenient, less prone to damage and more durable.

[0011] In the front cylinder of the above-mentioned breaker, the height of the rubber ring is greater than the height of the rubber ring groove. After the rubber ring is put in, there will be a certain compression effect, so that the rubber ring can be more firmly fixed in the rubber ring groove through its own elasticity, and play a better fixing role on the fixing pin shaft.

[0012] In the front cylinder of the above-mentioned breaker, the fixing groove forms a convex ring installation section at a section away from the end, and the height of the convex ring installation section is greater than or equal to the fixing convex ring. The fixing convex ring is better fixed by the blocking of the end surface of the installation section and the squeezing of the rubber ring, so that the fixing pin can be more firmly installed in the pin shaft through hole.

[0013] In the front cylinder of the above-mentioned breaker hammer, a drill rod is also arranged in the cylinder, a limiting groove is arranged on the drill rod, a flat pin through hole is arranged on the cylinder, the pin shaft through hole includes a flat pin fixing hole, the flat pin fixing hole passes through and is perpendicular to the flat pin through hole, the flat pin is arranged in the flat pin through hole and the limiting groove, the flat pin is arranged with a limiting through hole, and the fixing pin arranged in the flat pin fixing hole passes through the limiting through hole at the same time. The flat pin is installed in the main body through the above-mentioned arrangement; the arrangement of the flat pin is used to limit the moving space of the drill rod.

[0014] In the front cylinder of the above-mentioned breaker, the limiting through hole is in the shape of a strip, so that the flat pin can have a little displacement space when subjected to force, so as to play a certain buffering effect and avoid damage to the flat pin caused by excessive impact force.

[0015] In the front cylinder of the above-mentioned breaker hammer, the pin shaft through hole includes an inner sleeve fixing hole, the outer wall of the inner sleeve is provided with an inner sleeve fixing groove, the inner sleeve fixing groove is communicated with the inner sleeve fixing hole, and the fixing pin can be embedded in the inner sleeve fixing groove. The inner sleeve is fixed in the main body by the inner sleeve fixing groove, the inner sleeve fixing hole and the fixing pin.

[0016] In the front cylinder of the above-mentioned breaker, the pin shaft through hole includes a jacket fixing hole, the outer side wall of the jacket is provided with a jacket fixing groove, the jacket fixing groove is communicated with the jacket fixing hole, and the fixing pin can be embedded in the jacket fixing groove. The jacket is fixed in the main body by the jacket fixing groove, the jacket fixing hole and the fixing pin.

[0017] The utility model provides a stress relief groove on the periphery of the rubber ring, which can reduce the compression amount of the rubber ring when it is installed. When the rubber ring is installed, the rubber ring is squeezed, and the stress relief groove can disperse the shear force generated by the squeezing to the surrounding areas of the rubber ring, thereby avoiding damage caused by unilateral force on the rubber ring, making the rubber ring more convenient to install, not easy to break during installation, and increasing the service life of the rubber ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the front cylinder body of a breaker hammer of the utility model;

[0019] Figure 2 This is a top view of a front cylinder body of a breaker hammer according to the utility model;

[0020] Figure 3 It is a side view of the front cylinder body of a breaker hammer of the utility model;

[0021] Figure 4 This is a cross-sectional view AA of a front cylinder body of a breaker hammer of the utility model;

[0022] Figure 5 It is a cross-sectional view BB of a front cylinder body of a breaker hammer of the utility model;

[0023] Figure 6 This is a cross-sectional view CC of a front cylinder body of a breaker hammer of the utility model;

[0024] Figure 7 This is a cross-sectional view DD of a front cylinder body of a breaker hammer of the utility model;

[0025] Figure 8 It is a cross-sectional view BB of a breaker hammer according to the utility model after a fixing pin is set on the front cylinder body;

[0026] Fig. 9 This is a cross-sectional view CC of a breaker hammer according to the utility model after a fixing pin is set on the front cylinder body; Fig.10 This is a cross-sectional view DD of a breaker hammer according to the utility model after a fixing pin is set on the front cylinder body;

[0027] Fig.11 The utility model is a front cylinder of a breaker hammer Figure 8 A partial enlarged schematic diagram of

[0028] Fig.12 This is a schematic diagram of the rubber ring of the front cylinder of a breaker hammer of the utility model;

[0029] Fig.13 This is a cross-sectional schematic diagram E of a front cylinder body of a breaker hammer provided with a rear end of an upper drill rod;

[0030] Fig.14It is a schematic diagram of a flat pin of a front cylinder body of a breaker hammer of the utility model;

[0031] In the figure, 1. cylinder body, 11. pin shaft through hole, 111. flat pin fixing hole, 112. inner sleeve fixing hole, 113. outer sleeve fixing hole, 12. rubber ring groove, 13. fixing groove, 131. convex ring mounting section, 14. flat pin through hole, 2. drill rod, 21. limiting groove, 3. inner sleeve, 31. inner sleeve fixing groove, 4. outer sleeve, 41. outer sleeve fixing groove, 5. fixing pin, 51. fixing convex ring, 6. rubber ring, 61. unloading groove, 611. side wall, 7. flat pin, 71. limiting through hole. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0033] like Figure 1-12 As shown, a front cylinder of a breaker includes a cylinder body 1, an outer sleeve 4, a flat pin 7, and an inner sleeve 3 are fixed in the cylinder body 1 through a fixing structure, and the fixing structure includes a fixing pin 5, a pin shaft through hole 11, and a rubber ring 6. The pin shaft through hole 11 is opened on the cylinder body 1, and a fixing groove 13 is provided at one end of the pin shaft through hole 11, and a rubber ring groove 12 is provided in the fixing groove 13, and the radius of the fixing groove 13 is smaller than the radius of the rubber ring groove 12, and a fixing convex ring 51 is provided on the outer peripheral wall of the fixing pin 5, and the fixing groove 13 cooperates with the fixing convex ring 51, and a force unloading groove 61 is opened on the outer peripheral wall of the rubber ring 6.

[0034] like Fig.11 As shown, the outer periphery of the side wall 611 of the unloading groove 61 is inclined toward the end of the fixed rubber ring 6, and the unloading groove 61 is arranged in the middle of the outer side wall of the rubber ring 6, and the height of the rubber ring 6 is greater than the height of the rubber ring groove 12. The fixed groove 13 forms a convex ring installation section 131 at a section away from the end, and the height of the convex ring installation section 131 is greater than or equal to the fixed convex ring 51.

[0035] During installation, first place the inner sleeve 3, the outer sleeve 4 or the flat pin 7 in the correct position, then insert the fixing pin 5 from the side with a slightly larger aperture, the fixing convex ring 51 on the fixing pin 5 will fix the fixing pin 5 on one side, and finally install the elastic rubber ring 6. The rubber ring groove 12 is smaller than the rubber ring 6 itself. After the rubber ring 6 is inserted, there will be a certain compression effect, and the rubber ring 6 will be fixed in the rubber ring groove 12 to prevent the fixing pin 5 from falling out from the other end, thereby fixing the fixing pin 5 on the other side. A new unloading groove 61 is added, which can reduce the compression amount of the rubber ring 6 during installation, making the installation of the rubber ring 6 more convenient and the rubber ring 6 less likely to break. When the rubber ring 6 is squeezed, the grooves on both sides of the rubber ring 6 can disperse the shear force to the surroundings, making it more stable, reducing the damage caused by the unilateral force on the rubber ring 6, and increasing the service life of the rubber ring 6.

[0036] More specifically, if Figure 5 , 8 As shown in FIG. 13 , the outer sleeve 4 is loaded at the lower part of the cylinder body 1, between the drill rod 2 and the cylinder body 1, guiding the drill rod 2 and protecting the cylinder body 1, and is fixed to the cylinder body 1 by two fixing pins 5. The pin shaft through hole 11 includes an outer sleeve fixing hole 113, and the outer side wall of the outer sleeve 4 is provided with an outer sleeve fixing groove 41, which is communicated with the outer sleeve fixing hole 113, and the fixing pin 5 can be embedded in the outer sleeve fixing groove 41.

[0037] More specifically, if Figure 2 , 4 As shown in FIGS. 6, 9, 13 and 14, the flat pin 7 is a device for limiting the movement of the drill rod 2. The position and length of the limit groove 21 on the drill rod 2 can limit the maximum displacement and the minimum displacement of the drill rod 2. The flat pin 7 is fixed to the front cylinder body by a fixing pin 5, and the fixing pin 5 is fixed by two rubber rings 6. The limit through hole 71 provided on the flat pin 7 allows the flat pin 7 to have a little displacement space when subjected to force, so as to play a certain buffering effect and avoid damage to the flat pin 7 caused by excessive impact force.

[0038] More specifically, if Figure 4 , 7 As shown in FIGS. 10 and 13 , the inner sleeve 3 is inside the cylinder body 1, between the tail of the drill rod 2 and the cylinder body 1, and has a similar function to the outer sleeve 4, guiding the drill rod 2 and protecting the cylinder body 1, and is fixed inside the cylinder body 1 by a fixing pin 5. The pin shaft through hole 11 includes an inner sleeve fixing hole 112, and the outer side wall of the inner sleeve 3 is provided with an inner sleeve fixing groove 31, which is communicated with the inner sleeve fixing hole 112, and the fixing pin 5 can be embedded in the inner sleeve fixing groove 31.

[0039] The above examples are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this project to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the utility model should be included in the protection scope of the utility model.

Claims

1. A front cylinder of a breaker hammer, comprising a cylinder (1), an outer sleeve (4), a flat pin (7), and an inner sleeve (3) fixed in the cylinder (1) by a fixing structure, the fixing structure comprising a fixing pin (5), a pin shaft through hole (11), and a rubber ring (6), the pin shaft through hole (11) being provided on the cylinder (1), a fixing groove (13) being provided at one end of the pin shaft through hole (11), a rubber ring groove (12) being provided on the inner wall of the fixing groove (13), a fixing convex ring (51) being provided on the outer peripheral wall of the fixing pin (5), the fixing groove (13) being matched with the fixing convex ring (51), characterized in that: A force-releasing groove (61) is provided on the outer peripheral wall of the rubber ring (6).

2. The front cylinder of a breaker hammer according to claim 1, characterized in that: The other end of the pin shaft through hole (11) is also provided with a rubber ring groove (12).

3. The front cylinder of a breaker hammer according to claim 1, characterized in that: The outer periphery of the side wall (611) of the unloading groove (61) is inclined toward the end of the rubber ring (6).

4. The front cylinder of a breaker hammer according to claim 3, characterized in that: The unloading groove (61) is arranged in the middle of the outer side wall of the rubber ring (6).

5. The front cylinder of a breaker hammer according to claim 4, characterized in that: The height of the rubber ring (6) is greater than the height of the rubber ring groove (12).

6. The front cylinder of a breaker hammer according to claim 5, characterized in that: The fixing groove (13) forms a convex ring mounting section (131) at a section away from the end, and the height of the convex ring mounting section (131) is greater than or equal to the fixing convex ring (51).

7. The front cylinder of a breaker hammer according to claim 6, characterized in that: A drill rod (2) is also provided in the cylinder body (1), a limiting groove (21) is provided on the drill rod (2), a flat pin through hole (14) is provided on the cylinder body (1), the pin shaft through hole (11) comprises a flat pin fixing hole (111), the flat pin fixing hole (111) passes through and is perpendicular to the flat pin through hole (14), the flat pin (7) is arranged in the flat pin through hole (14) and the limiting groove (21), a limiting through hole (71) is provided on the flat pin (7), and the fixing pin (5) arranged in the flat pin fixing hole (111) passes through the limiting through hole (71) at the same time.

8. The front cylinder of a breaker hammer according to claim 7, characterized in that: The limiting through hole (71) is in a strip shape.

9. The front cylinder of a breaker hammer according to claim 6, characterized in that: The pin shaft through hole (11) comprises an inner sleeve fixing hole (112), the outer side wall of the inner sleeve (3) is provided with an inner sleeve fixing groove (31), the inner sleeve fixing groove (31) is communicated with the inner sleeve fixing hole (112), and the fixing pin (5) can be embedded in the inner sleeve fixing groove (31).

10. The front cylinder of a breaker hammer according to claim 6, characterized in that: The pin shaft through hole (11) comprises a jacket fixing hole (113), the outer side wall of the jacket (4) is provided with a jacket fixing groove (41), the jacket fixing groove (41) is communicated with the jacket fixing hole (113), and the fixing pin (5) can be embedded in the jacket fixing groove (41).

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