CN212641579U - Front cylinder body structure of hydraulic breaking hammer - Google Patents
Front cylinder body structure of hydraulic breaking hammer Download PDFInfo
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- CN212641579U CN212641579U CN202020819303.7U CN202020819303U CN212641579U CN 212641579 U CN212641579 U CN 212641579U CN 202020819303 U CN202020819303 U CN 202020819303U CN 212641579 U CN212641579 U CN 212641579U
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- cylinder body
- front cylinder
- mounting groove
- thickened portion
- outer sleeve
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Abstract
The utility model provides a preceding cylinder body structure of hydraulic breaking hammer belongs to quartering hammer technical field. It has solved the easy problem of damaging of current overcoat. This preceding cylinder body structure of hydraulic breaking hammer, including preceding cylinder body, set up in the front cylinder body the intraoral overcoat of front end and the drill rod of wearing to establish in the overcoat of setting in the cylinder body in the front, seted up on the inner peripheral surface of port before the preceding cylinder body and be annular mounting groove, the front end of mounting groove is uncovered, the rear end has the step face, it is annular thickening portion to have on the outer peripheral face of overcoat front end, thickening portion is located the mounting groove, and the outer peripheral face of thickening portion pastes with the inner wall of mounting groove mutually and leans on, the rear end face of thickening portion pastes with the step face mutually and leans on. The problem of the overcoat easy damage has been solved to this structure.
Description
Technical Field
The utility model belongs to the technical field of the quartering hammer, a hydraulic pressure quartering hammer, especially a hydraulic pressure quartering hammer's preceding cylinder body structure is related to.
Background
The breaking hammer is usually installed on an excavator, a loader or a power station for use, has the advantages of large impact force, convenient use, good maneuverability, high efficiency and the like, and is mainly used for the work of breaking, dismantling, excavating hard layers and the like in building construction. The breaking hammer generally comprises a front cylinder body, a middle cylinder body, a rear cylinder body, a drill rod and a piston, wherein the drill rod is arranged in the front cylinder body, the piston is arranged in the middle cylinder body, and the piston reciprocates along the axial direction of the middle cylinder body and strikes the drill rod.
At present, the chinese patent network discloses a hydraulic breaking hammer front cylinder body [ grant No.: CN208830390U ], the front cylinder has an inner sleeve hole and an outer sleeve hole formed by hollowing, the front cylinder is internally provided with an outer sleeve and an inner sleeve, the drill rod is arranged in the outer sleeve and the inner sleeve in a penetrating way, the outer peripheral surface of the front end of the outer sleeve is provided with an annular boss, the boss is positioned outside the front cylinder, and the rear end surface of the boss abuts against the front end surface of the front cylinder.
The quartering hammer during operation, the quartering hammer generally is vertical setting, and the piston strikes the drill rod, and then makes the drill rod break hard thing, and the quartering hammer is in the use, and the operative employee still can control the quartering hammer action and makes the drill rod outwards dial the hard thing that breaks up, perhaps when the drill rod inserts when darker in the course of the work, and the operative employee can control the quartering hammer action and make the drill rod around back or/and rock from side to side, makes things convenient for the drill rod to extract from the hard thing heap. Therefore, when the breaking hammer of the above patent is in use, when the drill rod swings back and forth or left and right, or when the drill rod pushes a hard object along the horizontal direction, the drill rod abuts against the inner edge of the front end of the outer sleeve, the front end of the outer sleeve is extruded by the drill rod, further, because the boss is positioned outside the front cylinder body, the boss is in a suspended state, stress is concentrated at the corner position between the inner edge of the rear end of the boss and the outer peripheral surface of the outer sleeve, the boss is broken at the corner position, because the front end of the outer sleeve is easy to break, the replacement period of the outer sleeve is short, the breaking hammer needs frequent maintenance, and the use cost of the breaking hammer is increased.
Disclosure of Invention
The utility model aims at having the above-mentioned problem to current technique, provided a preceding cylinder body structure of hydraulic breaking hammer, the utility model aims to solve the technical problem that: how to solve the problem that the overcoat is easy to damage.
The purpose of the utility model can be realized by the following technical proposal:
the front cylinder body structure of the hydraulic breaking hammer comprises a front cylinder body, an outer sleeve arranged in a front end port of the front cylinder body and a drill rod arranged in the front cylinder body in a penetrating mode, and is characterized in that an annular mounting groove is formed in the inner peripheral surface of the front end port of the front cylinder body, the front end of the mounting groove is open, the rear end of the mounting groove is provided with a step surface, an annular thickened portion is arranged on the outer peripheral surface of the front end of the outer sleeve, the thickened portion is located in the mounting groove, the outer peripheral surface of the thickened portion is attached to the inner wall of the mounting groove, and the rear end face of the thickened portion is attached to the step surface.
After the design of the structure is adopted, when the drill rod swings back and forth or/and left and right, the drill rod is abutted against the inner edge of the front end of the outer sleeve, the inner edge of the front end of the outer sleeve is extruded by the drill rod, so that the inner edge of the front end of the outer sleeve forms a stress point, the stress of the front end of the outer sleeve after being stressed is concentrated at a corner between the inner edge of the rear end surface of the thickened part and the outer peripheral surface of the outer sleeve, because the thickened part is positioned in the mounting groove and the outer peripheral surface of the thickened part is abutted against the inner wall of the mounting groove, the inner wall of the mounting groove forms a support for the thickened part, so that the drill rod transfers partial pressure applied to the front end of the outer sleeve to the front cylinder body, the stress concentration at the corner is reduced, the thickened part is prevented from being broken at the corner, and because the thickened part has higher structural strength at the front end of the outer sleeve, the front end, the use cost of the breaking hammer is reduced; in addition, compared with the prior art, because the overcoat and thickening part are all located the preceding cylinder body, the overcoat has saved the material of overcoat along excircle diametral direction in the process of making, because the overcoat is the vulnerable part, need regularly change, greatly reduced customer's use cost.
In the above-mentioned front cylinder structure of a hydraulic breaker, the front end surface of the thickened portion is flush with the front end surface of the front cylinder. Through the setting of this structure, whole overcoat and whole thickening portion all are located preceding cylinder body.
In the above front cylinder structure of the hydraulic breaker, a circular arc-shaped transition surface is provided between the inner edge of the rear end of the thickened portion and the outer peripheral surface of the outer sleeve. The design of transition face for the stress distribution of the corner between the interior border of thickening portion rear end face and the outer peripheral face of overcoat is more dispersed, and the thickening portion is difficult for breaking off at this corner.
In the above front cylinder structure of a hydraulic breaker, the inner edge of the front end of the thickened portion is provided with a round chamfer. When the drill rod swings back and forth or/and left and right, the drill rod extrudes the round chamfer of the inner edge of the front end of the outer sleeve, so that the stress of the inner edge of the front end of the outer sleeve is dispersed.
In the front cylinder body structure of the hydraulic breaking hammer, the thickness of the thickened part along the radial direction is 6-9 mm.
In the front cylinder body structure of the hydraulic breaking hammer, the thickness of the thickened part in the radial direction is 7-8 mm.
In the front cylinder body structure of the hydraulic breaking hammer, the length of the thickened part along the axial direction of the outer sleeve is 40-50 mm.
In the front cylinder structure of the hydraulic breaking hammer, the length of the thickened part along the axial direction of the outer sleeve is 43-47 mm.
In the above front cylinder structure of a hydraulic breaker, the length of the thickened portion in the direction of the jacket axis is 45 mm.
Compared with the prior art, the utility model discloses a hydraulic breaking hammer's preceding cylinder body structure has following advantage: after the design of the structure is adopted, when the drill rod swings back and forth or/and left and right, the drill rod is abutted against the inner edge of the front end of the outer sleeve, the inner edge of the front end of the outer sleeve is extruded by the drill rod, so that the inner edge of the front end of the outer sleeve forms a stress point, the stress of the front end of the outer sleeve after being stressed is concentrated at a corner between the inner edge of the rear end surface of the thickened part and the outer peripheral surface of the outer sleeve, because the thickened part is positioned in the mounting groove and the outer peripheral surface of the thickened part is abutted against the inner wall of the mounting groove, the inner wall of the mounting groove forms a support for the thickened part, so that the drill rod transfers partial pressure applied to the front end of the outer sleeve to the front cylinder body, the stress concentration at the corner is reduced, the thickened part is prevented from being broken at the corner, and because the thickened part has higher structural strength at the front end of the outer sleeve, the front end, the use cost of the breaking hammer is reduced; in addition, compared with the prior art, because the overcoat and thickening part are all located the preceding cylinder body, the overcoat has saved the material of overcoat along excircle diametral direction in the process of making, because the overcoat is the vulnerable part, need regularly change, greatly reduced customer's use cost.
Drawings
Fig. 1 is a schematic sectional structure of the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic sectional structure view of the front cylinder body of the present invention.
In the figure, 1, a front cylinder body; 11. mounting grooves; 12. a step surface; 2. a jacket; 21. thickening part; 22. a transition surface; 23. rounding and chamfering; 3. a drill rod.
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.
As shown in fig. 1, fig. 2 and fig. 3, the front cylinder structure of the hydraulic breaker includes a front cylinder 1, an outer sleeve 2 disposed in a front end opening of the front cylinder 1, and a drill rod 3 disposed in the front cylinder 1 and penetrating the outer sleeve 2, wherein an annular mounting groove 11 is disposed on an inner peripheral surface of the front end opening of the front cylinder 1, the front end of the mounting groove 11 is open, the rear end of the mounting groove 11 has a step surface 12, an annular thickened portion 21 is disposed on an outer peripheral surface of the front end of the outer sleeve 2, the thickened portion 21 is disposed in the mounting groove 11, an outer peripheral surface of the thickened portion 21 is attached to an inner wall of the mounting groove 11, and a rear end surface of the thickened portion 21 is attached to the step surface 12. After the design of the structure is adopted, when the drill rod 3 swings back and forth or/and left and right, the drill rod 3 is abutted against the inner edge of the front end of the outer sleeve 2, the inner edge of the front end of the outer sleeve 2 is extruded by the drill rod 3, so that the inner edge of the front end of the outer sleeve 2 forms a stress point, the stress of the front end of the outer sleeve 2 after being stressed is concentrated at a corner between the inner edge of the rear end surface of the thickened part 21 and the outer peripheral surface of the outer sleeve 2, because the thickened part 21 is positioned in the mounting groove 11 and the outer peripheral surface of the thickened part 21 is abutted against the inner wall of the mounting groove 11, the inner wall of the mounting groove 11 forms a support for the thickened part 21, so that the drill rod 3 transfers partial pressure applied to the front end of the outer sleeve 2 to the front cylinder body 1, the stress concentration at the corner is reduced, the thickened part 21 is prevented from being broken at the corner, and because the thickened part 21 is arranged, the structural strength of the front end of, the service life of the outer sleeve 2 is prolonged, and the use cost of the breaking hammer is reduced.
As shown in fig. 1, 2 and 3, the front end surface of the thickened portion 21 is flush with the front end surface of the front cylinder 1; a circular arc-shaped transition surface 22 is arranged between the inner edge of the rear end of the thickened part 21 and the outer peripheral surface of the outer sleeve 2, the transition surface 22 enables the stress at the corner between the inner edge of the rear end surface of the thickened part 21 and the outer peripheral surface of the outer sleeve 2 to be relatively dispersed, and the thickened part 21 is not easy to break at the corner; the inner edge of the front end of the thickened portion 21 is provided with a rounded chamfer 23.
As shown in fig. 1, 2 and 3, the thickness D of the thickened portion 21 in the radial direction is 6 to 9 mm; further, the thickness of the thickened portion 21 in the radial direction D is 7-8 mm, and in the embodiment, the thickness D of the thickened portion 21 in the radial direction is 7.5 mm.
As shown in fig. 1, 2 and 3, the length L of the thickened portion 21 in the axial direction of the jacket 2 is 40 to 50 mm; further, the length L of the thickened part 21 along the axial direction of the jacket 2 is 43-47 mm, and in the embodiment, the length L of the thickened part 21 along the axial direction of the jacket 2 is 45 mm.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (9)
1. The front cylinder body structure of the hydraulic breaking hammer comprises a front cylinder body (1), an outer sleeve (2) arranged in a front end opening of the front cylinder body (1) and a drill rod (3) arranged in the front cylinder body (1) and penetrating through the outer sleeve (2), and is characterized in that an annular mounting groove (11) is formed in the inner peripheral surface of the front end opening of the front cylinder body (1), the front end of the mounting groove (11) is open, a step surface (12) is arranged at the rear end of the mounting groove, an annular thickened portion (21) is arranged on the outer peripheral surface of the front end of the outer sleeve (2), the thickened portion (21) is located in the mounting groove (11), the outer peripheral surface of the thickened portion (21) is attached to the inner wall of the mounting groove (11), and the rear end surface of the thickened portion (21) is attached to the step surface (12).
2. A front cylinder structure of a hydraulic breaking hammer according to claim 1, characterized in that the front end surface of the thickened portion (21) is flush with the front end surface of the front cylinder (1).
3. A front cylinder structure of a hydraulic breaker according to claim 1 in which the thickened portion (21) has a transition surface (22) between the inner edge of the rear end and the outer periphery of the outer sleeve (2) in the shape of a circular arc.
4. A front cylinder structure of a hydraulic breaker hammer according to claim 1, wherein the inner edge of the front end of the thickened portion (21) is provided with a rounded chamfer (23).
5. A front cylinder structure of a hydraulic breaker according to any one of claims 1 to 4 wherein the thickness of the thickened portion (21) in the radial direction is 6 to 9 mm.
6. A front cylinder structure of a hydraulic breaker according to claim 5 wherein the thickness of the thickened portion (21) in the radial direction is 7 to 8 mm.
7. A front cylinder structure of a hydraulic breaker according to any one of claims 1 to 4 wherein the length of the thickened portion (21) in the axial direction of the outer sleeve (2) is 40 to 50 mm.
8. A front cylinder structure of a hydraulic breaker according to claim 7 wherein the length of the thickened portion (21) in the axial direction of the housing (2) is 43 to 47 mm.
9. A front cylinder structure of a hydraulic breaker hammer as claimed in claim 8, wherein the length of the thickened portion (21) in the axial direction of the jacket (2) is 45 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020819303.7U CN212641579U (en) | 2020-05-15 | 2020-05-15 | Front cylinder body structure of hydraulic breaking hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020819303.7U CN212641579U (en) | 2020-05-15 | 2020-05-15 | Front cylinder body structure of hydraulic breaking hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212641579U true CN212641579U (en) | 2021-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020819303.7U Active CN212641579U (en) | 2020-05-15 | 2020-05-15 | Front cylinder body structure of hydraulic breaking hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212641579U (en) |
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2020
- 2020-05-15 CN CN202020819303.7U patent/CN212641579U/en active Active
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