Breaking hammer for engineering machinery

Abstract

The invention discloses a breaking hammer for engineering machinery, and relates to the technical field of breaking hammers, and the breaking hammer is technically characterized by comprising a cylinder body, a split type piston is movably mounted at the upper part in the cylinder body, the split type piston comprises an upper rod body, a detachable impact part positioned below the upper rod body and a movable sleeve, and an impact force supplementing part is mounted in the middle of the outer wall of the upper rod body; a force increasing component is mounted on the inner side of the impact force supplementing component; the impact part comprises a connecting part fixedly arranged at the bottom end of the upper rod body, and an impact body is installed on the outer wall of the connecting part in a threaded mode, the technical effects that through the design of the split type piston, when the impact position of the piston and the drill rod is damaged, the impact body can be detached and independently replaced, and the replacement and purchase cost in the later period is reduced; and the impact force supplementing part and the force increasing part are used for storing and supplementing the impact force in the process of preparing the next impact, so that the subsequent crushing impact force is improved.

Description

Technical Field

[0001] The invention relates to the technical field of breaker hammers, in particular to a breaker hammer for engineering machinery. Background Art

[0002] 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 the main machine such as the excavator provides high-pressure oil to the breaker hammer, the oil pushes the piston to reciprocate in the cylinder. The piston gains kinetic energy during the movement and impacts the drill rod, which transmits the impact force to the object to be broken, thus breaking hard materials such as rocks and concrete. Compared with traditional mechanical crushing methods, hydraulically driven breaker hammers are not only flexible in operation, but also can accurately control the striking force and striking frequency by adjusting the hydraulic parameters to adapt to different working conditions.

[0003] Currently, most pistons are of one-piece structure. When damage occurs at the impact point, even if other parts can still be used normally, the entire piston needs to be replaced, making the subsequent purchase cost of replacement too high. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a breaker hammer for engineering machinery which can be designed with a split structure. When damage occurs at the impact site, only the local position needs to be replaced to continue to be used, thereby reducing the subsequent procurement cost.

[0005] To achieve the above object, the present invention provides the following technical solution: a breaker hammer for engineering machinery, comprising a cylinder body, a split piston movably mounted on the upper part of the cylinder body, the split piston comprising an upper rod body, a detachable impact part located below the upper rod body, and a movable sleeve, an impact force supplement component is mounted on the middle part of the outer wall of the upper rod body, and a force amplification component is mounted on the inner side of the impact force supplement component; The impact part includes a connecting part fixedly arranged at the bottom end of the upper rod body, and a striking body is threadedly installed on the outer wall of the connecting part; The impact force supplement component includes a mounting hole opened in the middle of the outer wall of the upper rod body, a lifting blocking body 1 is fixed to the top of the mounting hole, a connecting arm is symmetrically rotatably connected to the middle of the lifting blocking body 1, a lifting blocking body 2 is rotatably connected to the lower end of the connecting arm, and a movable sleeve is slidably installed in the middle of the outer wall of the upper rod body; The force-enhancing component includes a guide column installed in the middle of the impact force supplement component, a transverse pressure plate is slidably installed on the upper side of the outer wall of the guide column, a spring is installed below the outer wall of the guide column, and a sliding rod is rotatably installed on the inner side of the upper end of the rotating arm and corresponding to the transverse pressure plate.

[0006] Preferably, an outer shell is installed on the outer side of the cylinder body, a drill rod is installed at the lower part of the inner part of the cylinder body, and a limit pin is installed on one side of the cylinder body.

[0007] Preferably, a connecting screw hole is provided at the top of the impact body for use with the connecting part for installation and removal of the impact body. The outer diameter of the impact body is larger than the inner diameter of the movable sleeve for limiting the lowest descending position of the movable sleeve.

[0008] Preferably, upper inclined surfaces are provided on both sides of the lifting blocking body one, lower inclined surfaces are provided on the lifting blocking body two at positions corresponding to the upper inclined surfaces, a rotating groove is provided at positions corresponding to the lifting blocking body one and the lifting blocking body two and the connecting rotating arm, a lower rotating rod is provided at the lower end of the connecting rotating arm and at the position corresponding to the lifting blocking body two, which is used for connecting the rotating arm and the lifting blocking body two for rotation, and upper rotating rods are provided on both sides of the connecting rotating arm and at the positions corresponding to the lifting blocking body one, which are used for connecting the rotating arm and the lifting blocking body one for rotation.

[0009] Preferably, the outer diameters of the lifting blocking body 1 and the lifting blocking body 2 are the same, and the outer diameter of the lifting blocking body 2 is smaller than the outer diameter of the movable sleeve.

[0010] Preferably, a rotation notch is provided at the upper end of the connecting rotating arm and at a position corresponding to the transverse pressing plate, so as to avoid obstruction to the connecting rotating arm during rotation.

[0011] Preferably, a sliding groove is provided on one side of the transverse pressing plate at a position corresponding to the sliding rod, and the sliding rod is in rolling contact with the transverse pressing plate.

[0012] Preferably, the spring is in a compressed state for providing pressure to lift the blocking body at two locations.

[0013] Compared with the prior art, the present invention provides a breaker hammer for engineering machinery, which has the following beneficial effects: through the design of the split piston, when the impact part with the drill rod is damaged, the impact body can be disassembled and replaced separately, thereby reducing the later replacement and procurement costs; The impact force supplement component and the force-enhancing component are used to reserve and supplement the impact power in preparation for the next impact, thereby improving the subsequent crushing impact force, and further with the help of the connecting rotating arm, the lower rotating rod, the upper rotating rod and the sliding rod, a lever arm is formed, and with the help of the lever arm, the reserved impact force is amplified, the impact force is further enhanced, and the crushing efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a structural schematic diagram of the piston in the present invention; Figure 4 It is a schematic diagram of the disassembled structure of the piston in the present invention; Figure 5 is a cross-sectional view of the piston in the present invention; Figure 6 For the present invention Figure 5 The enlarged schematic diagram at A in the middle; Figure 7 It is a structural schematic diagram of the impact force supplement component in the present invention; Figure 8 It is a schematic diagram of the internal structure of the impact force supplement component of the present invention; Fig. 9 It is a top view of the lifting barrier body 1 in the present invention.

[0015] In the figure: 1, cylinder body; 11, outer shell; 12, drill rod; 13, limit pin; 14, upper rod body; 2. impact body; 21. movable sleeve; 22. connecting part; 23. connecting screw hole; 3. Impact force supplement component; 31. Mounting hole; 32. Lifting blocking body 1; 33. Upper inclined surface; 34. Lifting blocking body 2; 35. Lower inclined surface; 36. Connecting rotating arm; 37. Rotating groove; 38. Lower rotating rod; 39. Upper rotating rod; 4. Slide rod; 41. Guide column; 42. Spring; 43. Horizontal pressure plate; 44. Slide groove; 45. Rotation notch. DETAILED DESCRIPTION

[0016] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0017] See also Figure 1-9 , the present invention provides a technical solution for a breaker hammer for engineering machinery: Embodiment 1, a breaker hammer for engineering machinery, comprising a cylinder body 1, a split piston is movably mounted on the upper part of the cylinder body 1, the split piston comprises 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-enhancing component is mounted on the inner side of the impact force supplement component 3; The impact part includes a connecting part 22 fixedly arranged at the bottom end of the upper rod body 14, and the impact body 2 is threadedly installed on the outer wall of the connecting part 22; 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 blocking body 1 32 is fixed to the top of the mounting hole 31, a connecting arm 36 is symmetrically rotatably connected to the middle of the lifting blocking body 1 32, and a lifting blocking body 2 34 is rotatably connected to the lower end of the connecting arm 36, and a movable sleeve 21 is slidably installed in the middle of the outer wall of the upper rod body 14; The force-enhancing component includes a guide column 41 installed in the middle of the impact force supplement component 3, a transverse pressure plate 43 is slidably installed on the upper side of the outer wall of the guide column 41, a spring 42 is installed on the lower side of the outer wall of the guide column 41, and a slide bar 4 is rotatably installed at the inner side of the upper end of the rotating arm 36 and corresponding to the transverse pressure plate 43; 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 inner part of the cylinder body 1, a limit pin 13 is installed on one side of the cylinder body 1, and a connecting screw hole 23 used in conjunction with the connecting part 22 is opened at the top of the impact body 2 for 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, which is used to limit the lowest downward position of the movable sleeve 21. The design of the split piston allows the impact body 2 to be disassembled and replaced separately when damage occurs at the impact site, thereby reducing the later replacement and procurement costs.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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; 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. When the high-pressure oil pushes the split piston to prepare for the next impact, it will first push the movable sleeve 21 to move in the opposite direction. During the reverse movement of the movable sleeve 21, the two lifting blocking bodies 34 will be first pushed to rotate around the upper rotating rod 39 connected to the rotating arm 36, and in the process of rotation, the two lifting blocking bodies 34 will be combined into a whole with the help of the upper inclined surface 33 and the lower inclined surface 35. 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, the movement of the movable sleeve 21 will be blocked, and the split piston can be further pushed in the opposite direction. When the connecting arm 36 rotates, the slide bar 4 is pushed to verify that the slide groove 44 inside the transverse pressure plate 43 rolls, and the transverse pressure plate 43 is pulled downward along the guide column 41, further compressing the spring 42 below, completing the replenishment of the impact force. During the next impact, the impact force of the reserve and the spring 42 is transmitted by means of the lifting blocking body 2 34 and the movable sleeve 21, thereby realizing the improvement of the crushing impact force and improving the crushing efficiency. The lever effect of the connecting arm 36 is used to further amplify the impact force. At the same time, the movable sleeve 21 falls more quickly. When the movable sleeve 21 falls to the lowest point, a pressure will be generated on the impact body 2, thereby improving the thread engagement strength between the connecting portion 22 and the impact body 2, and avoiding the occurrence of loosening during the impact process. When damage occurs at the collision point between the split piston and the drill rod 12, the collision body 2 can be disassembled and replaced separately, thereby reducing the subsequent replacement purchase cost.

[0022] 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 basically the same technical problems and achieve basically the same technical effects are all included in 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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