A breaker for construction machinery

Abstract

The present invention discloses a breaker for construction machinery, which relates to the technical field of breakers. Its technical key points include a cylinder block. An internally movable split piston is installed above the interior of the cylinder block. The split piston includes an upper rod body, a detachable impact part located below the upper rod body, and a movable sleeve. A striking force supplementing component is installed in the middle of the outer wall of the upper rod body, and a force increasing component is installed inside the striking force supplementing component; the impact part includes a connecting part fixedly arranged at the bottom end of the upper rod body, and an impact body is threadedly installed at the outer wall of the connecting part. The technical effect is that through the design of the split piston, when damage occurs at the impact part with the drill rod, the impact body can be disassembled and replaced separately, reducing the later replacement and procurement costs; by using the striking force supplementing component and the force increasing component, during the preparation for the next impact, the impact power is reserved and supplemented, thereby enhancing the subsequent crushing impact force.

Description

Technical Field

[0001] The present invention relates to the technical field of breaker hammers, and specifically to a breaker hammer for construction machinery. Background Art

[0002] Currently, the mainstream breaker hammers on the market are hydraulically driven, and their working principle is based on Pascal's law. When the hydraulic system of a host machine such as an excavator supplies high-pressure hydraulic oil to the breaker hammer, the hydraulic oil pushes the piston to reciprocate in the cylinder block. The piston obtains kinetic energy during the movement and impacts the drill rod, and the drill rod transmits the impact force to the object to be broken, realizing the breaking of hard materials such as rocks and concrete. Compared with the traditional mechanical breaking method, the hydraulically driven breaker hammer is not only flexible in operation, but also can accurately control the impact force and impact frequency by adjusting hydraulic parameters to adapt to different working conditions.

[0003] Currently, most pistons are of an integral structure. When the impact part is damaged, even if other parts can still be used normally, the entire piston needs to be replaced, resulting in too high procurement costs for later replacement. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a breaker hammer for construction machinery. Through a split structure design, when the impact part is damaged, only a local position needs to be replaced to continue using, reducing the later procurement cost.

[0005] To achieve the above object, the present invention provides the following technical solution: A breaker hammer for construction machinery includes a cylinder block. A split piston is movably installed above the interior of the cylinder block. The split piston includes an upper rod body, a detachable impact part located below the upper rod body, and a movable sleeve. An impact force supplement component is installed in the middle of the outer wall of the upper rod body, and an intensifying component is installed inside the impact force supplement component;

[0006] The impact part includes a connecting part fixedly arranged at the bottom end of the upper rod body, and an impact body is threadedly installed on the outer wall of the connecting part;

[0007] The impact force supplement component includes an installation hole opened in the middle of the outer wall of the upper rod body. A lifting blocking body one is fixed at the top end of the installation hole. Connecting rotating arms are symmetrically and rotatably connected in the middle of the lifting blocking body one. The lower end of the connecting rotating arm is rotatably connected to a lifting blocking body two. A movable sleeve is slidably installed in the middle of the outer wall of the upper rod body;

[0008] The intensifying component includes a guiding column installed in the middle of the impact force supplement component. A transverse pressing plate is slidably installed above the outer wall of the guiding column. A spring is installed below the outer wall of the guiding column. A sliding rod is rotatably installed at the inner side of the upper end of the connecting rotating arm and corresponding to the transverse pressing plate.

[0009] Preferably, an outer housing is installed outside the cylinder block, a drill rod is installed below the interior of the cylinder block, and a limit pin is installed on one side of the cylinder block.

[0010] Preferably, a connecting screw hole for cooperating with the connecting part is provided at the top end of the impact body for the installation and disassembly of the impact body. The outer diameter of the impact body is larger than the inner diameter of the movable sleeve to limit the lowest downward position of the movable sleeve.

[0011] Preferably, upper inclined surfaces are provided on both sides of the lifting and blocking body I, lower inclined surfaces are provided at positions corresponding to the upper inclined surfaces of the lifting and blocking body II, a rotary groove is commonly provided at positions corresponding to the connecting rotating arm of the lifting and blocking body I and the lifting and blocking body II, a lower rotating rod is provided at the lower end of the connecting rotating arm and corresponding to the lifting and blocking body II for the rotation of the connecting rotating arm and the lifting and blocking body II, and upper rotating rods are provided on both sides of the connecting rotating arm and corresponding to the lifting and blocking body I for the rotation of the connecting rotating arm and the lifting and blocking body I.

[0012] Preferably, the outer diameters of the lifting and blocking body I and the lifting and blocking body II are the same, and the outer diameter of the lifting and blocking body II is smaller than the outer diameter of the movable sleeve.

[0013] Preferably, a rotary notch is provided at the upper end of the connecting rotating arm and corresponding to the transverse pressing plate to avoid blocking during the rotation of the connecting rotating arm.

[0014] Preferably, a sliding groove is provided on one side of the transverse pressing plate and corresponding to the sliding rod, and the sliding rod is in rolling contact with the transverse pressing plate.

[0015] Preferably, the spring is in a compressed state to provide pressure at the position of the lifting and blocking body II.

[0016] Compared with the prior art, the present invention provides a breaker for construction machinery, having the following beneficial effects: through the design of the split piston, when damage occurs at the impact part with the drill rod, the impact body can be disassembled and replaced separately, reducing the later replacement and procurement costs;

[0017] During the process of preparing for the next impact by the impact force supplementing component and the force increasing component, the impact power is reserved and supplemented, thereby enhancing the subsequent crushing impact force. Further, by means of the connecting rotating arm, the lower rotating rod, the upper rotating rod and the sliding rod, a lever force arm is formed. With the action of the lever force arm, the reserved impact force is amplified, further enhancing the impact force and improving the crushing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a schematic diagram of the internal structure of the present invention;

[0020] Figure 3 is a schematic diagram of the structure of the piston in the present invention;

[0021] Figure 4 Schematic diagram of the disassembly structure of the piston in the present invention;

[0022] Figure 5 Cross-sectional view of the piston in the present invention;

[0023] Figure 6 In the present invention Figure 5 Enlarged schematic view at position A;

[0024] Figure 7 Schematic diagram of the structure at the impact force supplement component in the present invention;

[0025] Figure 8 Internal structure schematic diagram of the impact force supplement component in the present invention;

[0026] Figure 9 Top view of the lifting and blocking body 1 in the present invention.

[0027] In the figure: 1. Cylinder block; 11. Outer shell; 12. Drift; 13. Limit pin; 14. Upper rod body;

[0028] 2. Impact body; 21. Movable sleeve; 22. Connection part; 23. Connection screw hole;

[0029] 3. Impact force supplement component; 31. Mounting hole; 32. Lifting and blocking body 1; 33. Upper inclined surface; 34. Lifting and blocking body 2; 35. Lower inclined surface; 36. Connection rotating arm; 37. Rotary groove; 38. Lower rotating rod; 39. Upper rotating rod;

[0030] 4. Slide bar; 41. Guide post; 42. Spring; 43. Transverse pressing plate; 44. Slide groove; 45. Rotary notch. Detailed implementation manners

[0031] In the present invention, unless otherwise stated, the orientations such as "upper and lower" are usually relative to the directions shown in the drawings, or relative to the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "left and right" are usually relative to the left and right shown in the drawings; "inside and outside" refer to the inside and outside relative to the contour of each component itself, but the above orientation terms are not used to limit the present invention.

[0032] Please refer to Figures 1-9 , the present invention provides a technical solution for a breaker for construction machinery:

[0033] Embodiment 1, a breaker for construction machinery, includes a cylinder block 1, a split piston is movably installed above the inside of the cylinder block 1, the split piston includes an upper rod body 14, an impact part that is detachably located below the upper rod body 14, and a movable sleeve 21. An impact force supplement component 3 is installed in the middle of the outer wall of the upper rod body 14, and a force increasing component is installed inside the impact force supplement component 3;

[0034] The impact part includes a connecting part 22 fixedly arranged at the bottom end of the upper rod body 14, and an impact body 2 is threadedly installed on the outer wall of the connecting part 22;

[0035] The impact force supplement component 3 includes a mounting hole 31 opened in the middle of the outer wall of the upper rod body 14. A lifting and blocking body 32 is fixed at the top end of the mounting hole 31. The middle part of the lifting and blocking body 32 is symmetrically and rotatably connected with a connecting rotating arm 36. The lower end of the connecting rotating arm 36 is rotatably connected with a lifting and blocking body 34. A movable sleeve 21 is slidably installed in the middle of the outer wall of the upper rod body 14;

[0036] The force increasing component includes a guide post 41 installed in the middle of the impact force supplement component 3. A transverse pressing plate 43 is slidably installed above the outer wall of the guide post 41. A spring 42 is installed below the outer wall of the guide post 41. A slide rod 4 is rotatably installed at the inner side of the upper end of the connecting rotating arm 36 and corresponding to the transverse pressing plate 43;

[0037] An outer housing 11 is installed on the outside of the cylinder block 1. A drill rod 12 is installed below the inside of the cylinder block 1. A limit pin 13 is installed on one side of the cylinder block 1. A connecting screw hole 23 for cooperating with the connecting part 22 is opened at the top end of the impact body 2 for the installation and disassembly of the impact body 2. The outer diameter of the impact body 2 is larger than the inner diameter of the movable sleeve 21 for restricting the lowest downward position of the movable sleeve 21. With the design of the split piston, when damage occurs at the impact part, the impact body 2 can be disassembled and replaced separately, reducing the later replacement and procurement costs.

[0038] In the second embodiment, upper inclined surfaces 33 are provided on both sides of the lifting blocking body 1 32, and lower inclined surfaces 35 are provided on the lifting blocking body 2 34 at the position corresponding to the upper inclined surfaces 33. A rotating groove 37 is provided at the corresponding positions of the lifting blocking body 1 32 and the lifting blocking body 2 34 and the connecting rotating arm 36. A lower rotating rod 38 is provided at the lower end of the connecting rotating arm 36 and at the position corresponding to the lifting blocking body 2 34, which is used to connect the rotating arm 36 and the lifting blocking body 2 34 for rotation. Upper rotating rods 39 are provided on both sides of the connecting rotating arm 36 and at the position corresponding to the lifting blocking body 1 32, which are used to connect the rotating arm 36 and the lifting blocking body 1 32 for rotation. A raised area is provided at the middle part of the outer wall of the upper rod body 14 and at the lower part of the outer wall of the movable sleeve 21. With the help of the upper inclined surface 3 3 and the lower inclined surface 35, the lifting blocking body 1 32 and the two lifting blocking bodies 2 34 can be combined into a whole, and the upward movement stroke of the movable sleeve 21 can be limited, so that after the upper rod body 14 is blocked and lifted, the inertial impact power is stored through the movable sleeve 21, and the movable sleeve 21 can return to its original position more quickly with the help of its own gravity and the elastic force of the spring 42, so as to complete the supplement of the impact force and improve the crushing efficiency. The outer diameters of the lifting blocking body 1 32 and the lifting blocking body 2 34 are the same, and the outer diameter of the lifting blocking body 2 34 is smaller than the outer diameter of the movable sleeve 21. A swivel notch 45 is provided at the upper end of the connecting arm 36 and at the corresponding position to the horizontal pressure plate 43 to avoid obstruction of the connecting arm 36 during rotation.

[0039] In the third embodiment, a slide groove 44 is provided on one side of the transverse pressure plate 43 and at a position corresponding to the slide rod 4. The slide rod 4 is in rolling contact with the transverse pressure plate 43, and the spring 42 is in a compressed state, which is used to provide pressure on the lifting blocking body 2 34. The spring 42 is always in a compressed state, which can ensure that when the movable sleeve 21 contacts the impact body 2, there is sufficient pressure at the contact point. The straight-line distance from the axial position of the slide rod 4 to the axial position of the upper rotating rod 39 is greater than the straight-line distance from the axial position of the lower rotating rod 38 to the axial position of the upper rotating rod 39, so that the impact force stored at the spring 42 can be amplified to further enhance the impact force.

[0040] It should be noted that this design needs to be used in conjunction with engineering machinery, which is a common method of use in this field. The specific installation method will not be described in detail in this application.

[0041] When used specifically, the present invention is used as a breaker hammer for engineering machinery. When used, when high-pressure oil enters one side of the split piston, it pushes the split piston to move to the other side, forming an impact stroke;

[0042] When the split piston moves to a certain position, the flow direction of the oil will change, causing the split piston to move in the opposite direction and return to the initial position to prepare for the next impact. During the reciprocating motion, the split piston will hit the drill rod 12 at a very high speed and force, thereby obtaining a huge crushing impact force.

[0043] During the process of the high-pressure oil pushing the split piston to prepare for the next impact, it will first push the movable sleeve 21 to move in the reverse direction. During the reverse movement of the movable sleeve 21, it will first push the two second lifting and blocking bodies 34 to rotate around the upper rotating rod 39 at the connecting rotating arm 36. And during the rotation process, with the cooperation of the upper inclined surface 33 and the lower inclined surface 35, the two second lifting and blocking bodies 34 are combined into a whole. At this time, the upper inclined surface 33 and the lower inclined surface 35 are in contact with each other. After the combination is completed, it will block the movement of the movable sleeve 21, and then further push the split piston in the reverse direction;

[0044] While the connecting rotating arm 36 is rotating, it pushes the sliding rod 4 to roll in the inner chute 44 of the transverse pressing plate 43, and pulls the transverse pressing plate 43 to move down along the guiding column 41, further compressing the lower spring 42 to complete the supplementary reserve of the impact force. During the next impact process, the impact force stored in the spring 42 is transmitted through the second lifting and blocking body 34 and the movable sleeve 21, so as to realize the improvement of the crushing impact force, improve the crushing efficiency, and utilize the lever effect of the connecting rotating arm 36 to further amplify the impact force of the impact. At the same time, the movable sleeve 21 falls faster. When the movable sleeve 21 falls to the lowest point, it will generate a pressure on the impact body 2, thereby enhancing the thread engagement force between the connecting part 22 and the impact body 2, and avoiding the occurrence of loosening during the impact process;

[0045] When the impact part between the split piston and the drill rod 12 is damaged, the impact body 2 can be disassembled and replaced separately, reducing the later replacement and procurement costs.

[0046] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve substantially the same technical problems and achieve substantially the same technical effects are all covered by the protection scope of the present invention.

Claims

1. A breaker hammer for construction machinery, comprising a cylinder body (1), characterized in that: A split piston is movably mounted on the upper part of the cylinder body (1), the split piston comprising an upper rod body (14), a detachable impact part located below the upper rod body (14), and a movable sleeve (21); an impact force supplement component (3) is mounted on the middle part of the outer wall of the upper rod body (14), and a force amplification component is mounted on the inner side of the impact force supplement component (3); The impact part comprises a connecting part (22) fixedly arranged at the bottom end of the upper rod body (14), and a striking body (2) is threadedly mounted on the outer wall of the connecting part (22); The impact force supplementing component (3) comprises a mounting hole (31) formed in the middle of the outer wall of the upper rod body (14); a lifting blocking body (32) is fixed to the top of the mounting hole (31); a connecting arm (36) is symmetrically and rotatably connected to the middle of the lifting blocking body (32); a lower end of the connecting arm (36) is rotatably connected to the lifting blocking body (34); and a movable sleeve (21) is slidably mounted in the middle of the outer wall of the upper rod body (14); The force-enhancing component comprises a guide column (41) installed in the middle of the impact force supplementing component (3), a transverse pressure plate (43) is slidably installed above the outer wall of the guide column (41), a spring (42) is installed below the outer wall of the guide column (41), and a slide bar (4) is rotatably installed on the inner side of the upper end of the rotating arm (36) and corresponding to the transverse pressure plate (43).

2. A breaker hammer for construction machinery according to claim 1, characterized in that: An outer shell (11) is installed on the outer side of the cylinder body (1), a drill rod (12) is installed at the lower part of the cylinder body (1), and a limit pin (13) is installed on one side of the cylinder body (1).

3. A breaker hammer for construction machinery according to claim 1, characterized in that: A connecting screw hole (23) is provided at the top end of the impact body (2) for use with the connecting portion (22) and is used for mounting and dismounting the impact body (2). The outer diameter of the impact body (2) is larger than the inner diameter of the movable sleeve (21) and is used to limit the lowest descending position of the movable sleeve (21).

4. A breaker hammer for construction machinery according to claim 1, characterized in that: Upper inclined surfaces (33) are provided on both sides of the lifting blocking body 1 (32); lower inclined surfaces (35) are provided on the lifting blocking body 2 (34) at positions corresponding to the upper inclined surfaces (33); a rotating groove (37) is provided on the lifting blocking body 1 (32) and the lifting blocking body 2 (34) at positions corresponding to the connecting rotating arm (36); a lower rotating rod (38) is provided at the lower end of the connecting rotating arm (36) at a position corresponding to the lifting blocking body 2 (34) for connecting the rotating arm (36) and the lifting blocking body 2 (34) for rotation; and upper rotating rods (39) are provided on both sides of the connecting rotating arm (36) at positions corresponding to the lifting blocking body 1 (32) for connecting the rotating arm (36) and the lifting blocking body 1 (32) for rotation.

5. A breaker hammer for construction machinery according to claim 1, characterized in that: The outer diameters of the first lifting blocking body (32) and the second lifting blocking body (34) are the same, and the outer diameter of the second lifting blocking body (34) is smaller than the outer diameter of the movable sleeve (21).

6. A breaker hammer for construction machinery according to claim 1, characterized in that: A rotation notch (45) is provided at the upper end of the connecting rotating arm (36) and at a position corresponding to the transverse pressing plate (43) to avoid obstruction of the connecting rotating arm (36) during rotation.

7. A breaker hammer for construction machinery according to claim 1, characterized in that: A slide groove (44) is provided on one side of the transverse pressing plate (43) and at a position corresponding to the slide bar (4), and the slide bar (4) is in rolling contact with the transverse pressing plate (43).

8. A breaker hammer for construction machinery according to claim 4, characterized in that: The spring (42) is in a compressed state and is used to provide pressure to the second lifting barrier (34).

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