A hydraulic breaker with a long service life

Abstract

This application relates to the field of crushing equipment, and in particular to a hydraulic breaker with a long service life. The breaker includes a housing, a mounting base on the housing, a chisel that slides vertically through both ends of the mounting base, and a limiting element on the mounting base to restrict the sliding distance of the chisel. A rocker arm is rotatably mounted on the housing, and an impact hammer is mounted on the rocker arm to impact the top of the chisel. A hydraulic cylinder, electrically connected to a control system, is rotatably mounted on the housing, and the piston rod of the hydraulic cylinder is rotatably mounted on the rocker arm. This application effectively extends the service life of the hydraulic breaker.

Description

Technical Field

[0001] This application relates to the field of crushing equipment, and in particular to a hydraulic breaker with a long service life. Background Technology

[0002] A hydraulic breaker is an impact machine that uses hydraulic energy to drive a piston in reciprocating motion to perform crushing operations. It is widely used in rock crushing, building demolition, and other fields. Its core working principle is that the hydraulic system drives the piston to strike the chisel at high speed, thereby crushing ore or concrete.

[0003] In existing technologies, hydraulic hammers primarily use the reciprocating motion of the piston rod of a hydraulic cylinder to strike a chisel, thereby enabling the chisel to break solid objects.

[0004] However, as the hydraulic cylinder's extension rod impacts the chisel repeatedly over a long period, high temperatures easily form at the contact point between the extension rod and the chisel. Since the extension rod is typically made of metal, this high temperature is transferred to the inside of the hydraulic cylinder, causing the lubricating oil inside to heat up. The lubricating oil's performance decreases significantly after heating, leading to increased friction in hydraulic components. Simultaneously, accelerated oxidation of the lubricating oil easily produces gum deposits, which can clog oil filters and hydraulic valve orifices, preventing the hydraulic system from functioning properly and severely impacting the lifespan of the hydraulic breaker. This presents a significant drawback. Utility Model Content

[0005] To address the problems associated with traditional hydraulic breakers, this application provides a hydraulic breaker with a long service life.

[0006] The hydraulic breaker with a long service life provided in this application adopts the following technical solution: A hydraulic breaker with a long service life includes a housing, a mounting base on the housing, a chisel that slides vertically through both ends of the mounting base, a limiting member on the mounting base to limit the sliding distance of the chisel, a rocker arm rotatably mounted on the housing, an impact hammer mounted on the rocker arm for impacting the top of the chisel, and a hydraulic cylinder electrically connected to a control system rotatably mounted on the housing, the piston rod of the hydraulic cylinder rotatably mounted on the rocker arm.

[0007] By adopting the above technical solution, the control system starts the hydraulic cylinder, and the piston rod of the hydraulic cylinder quickly pushes the rocker arm to rotate. The rotating rocker arm drives the impact hammer to strike the top of the chisel, and the bottom of the chisel breaks the object. During this process, the heat generated by the impact is first transferred to the impact hammer and then to the rocker arm, which increases the path of heat transfer to the piston rod of the hydraulic cylinder. This ensures that the heat transferred to the piston rod of the hydraulic cylinder is insufficient to heat up the lubricating oil, thereby reducing the damage caused by the heating of the lubricating oil and reducing the possibility of damage to the internal components of the hydraulic cylinder, ultimately achieving the effect of extending service life.

[0008] Optionally, the limiting component includes a guide tube disposed within the mounting base, the guide tube being slidably sleeved on the drill rod, the guide tube being located on both sides of the flat groove of the drill rod along the axial direction of the guide tube, and a limiting pin being detachably disposed on the mounting base, the limiting pin being used to engage with the flat groove of the drill rod, the width of the limiting pin along the axial direction of the guide tube being less than the length of the flat groove of the drill rod along the axial direction of the guide tube.

[0009] By adopting the above technical solution, the maximum sliding distance of the drill rod is limited, and at the same time, the possibility of the drill rod detaching from the mounting base is reduced.

[0010] Optionally, the housing is provided with a contact sensor electrically connected to the control system, and the side of the impact hammer facing away from the chisel is used to contact the sensing end of the contact sensor.

[0011] By adopting the above technical solution, after the impact hammer strikes the top of the chisel, the control system starts the piston rod of the hydraulic cylinder to retract. The piston rod of the hydraulic cylinder drives the rocker arm to rotate in the opposite direction, and the impact hammer continuously approaches the contact sensor until the sensing end of the contact sensor is triggered. At this time, the control system controls the piston rod of the hydraulic cylinder to stop moving, thus preparing for the next impact hammer to strike the top of the chisel.

[0012] Optionally, the impact hammer may be detachably provided with an impact block, which is used to impact the top of the chisel rod.

[0013] By adopting the above technical solution, workers can quickly repair the impact hammer by replacing the impact block, which helps to reduce the maintenance cost of the impact hammer.

[0014] Optionally, the impact hammer is hollow inside and open on one side, and a sealing plate is detachably provided at the open end of the impact hammer. An energy-absorbing component for absorbing vibration energy is provided inside the impact hammer.

[0015] By adopting the above technical solution, after the impact hammer strikes the top of the chisel, the energy-absorbing component absorbs the reaction force generated by the impact hammer, thereby reducing the possibility of damage to the hydraulic cylinder.

[0016] Optionally, the energy-absorbing element includes steel shot disposed inside the impact hammer.

[0017] By adopting the above technical solution, when the impact hammer strikes the top of the chisel, the steel shot inside the impact hammer will bounce rapidly inside the impact hammer. Finally, through the friction between several steel shots, the impact on the impact hammer is absorbed, thereby reducing the possibility that the impact hammer will rotate in the opposite direction around the rocker arm due to the impact, thus reducing the possibility of damage to the hydraulic cylinder.

[0018] Optionally, the energy-absorbing element includes a plurality of steel balls arranged inside the impact hammer.

[0019] By adopting the above technical solution, when the impact hammer strikes the top of the chisel, the steel balls inside the impact hammer will not only bounce up, but the steel balls will also rub and collide with each other, thereby absorbing the vibration energy of the impact hammer striking the chisel.

[0020] Optionally, a pressure plate is slidably disposed inside the impact hammer, and a base plate is disposed on the impact hammer on the side of the pressure plate facing away from the steel ball. A guide post is disposed on the pressure plate, and the guide post slides through the base plate. A compression spring supports the pressure plate and the base plate.

[0021] By adopting the above technical solution, during the process of the impact hammer rapidly rotating around the rocker arm to impact the drill rod, the compression spring presses the pressure plate onto the steel ball through the base plate. At this time, the steel ball and the impact hammer form a whole, thereby increasing the impact force of the impact hammer hitting the drill rod. When the impact hammer hits the top of the drill rod, the steel ball will push the pressure plate in the opposite direction, and the compression spring will be compressed. Through the jumping of the steel ball and the friction between the steel balls, the vibration energy of the impact hammer is absorbed, thereby achieving the effect of shock absorption.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The control system starts the hydraulic cylinder, and the piston rod of the hydraulic cylinder quickly pushes the rocker arm to rotate. The rotating rocker arm drives the impact hammer to strike the top of the chisel, and the bottom of the chisel breaks the object. During this process, the heat generated by the impact is first transferred to the impact hammer and then to the rocker arm. This increases the path of heat transfer to the piston rod of the hydraulic cylinder, making the heat transferred to the piston rod of the hydraulic cylinder insufficient to heat up the lubricating oil. This reduces the damage caused by the heating of the lubricating oil, thereby reducing the possibility of damage to the internal components of the hydraulic cylinder and ultimately extending its service life. 2. When the impact hammer strikes the top of the chisel, the steel shot inside the impact hammer will bounce rapidly inside the impact hammer. Finally, through the friction between several steel shots, the impact on the impact hammer is absorbed, thereby reducing the possibility that the impact hammer will rotate in the opposite direction around the rocker arm due to the impact, thus reducing the possibility of damage to the hydraulic cylinder. 3. During the rapid rotation of the impact hammer around the rocker arm to impact the chisel, the compression spring presses the pressure plate against the steel ball through the base plate. At this time, the steel ball and the impact hammer form a whole, which increases the impact force of the impact hammer hitting the chisel. When the impact hammer hits the top of the chisel, the steel ball pushes the pressure plate in the opposite direction, and the compression spring is compressed. Through the jumping of the steel ball and the friction between the steel balls, the vibration energy of the impact hammer is absorbed, thereby achieving the effect of shock absorption. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0024] Figure 2 This is a structural schematic diagram of Embodiment 1 of this application, used to illustrate the positions of the impact hammer, chisel, and hydraulic cylinder.

[0025] Figure 3 This is a cross-sectional view in Embodiment 1 of this application used to illustrate the positional relationship between the mounting base, the drill rod, and the limiting pin.

[0026] Figure 4 This is a cross-sectional view in Embodiment 1 of this application used to illustrate the positional relationship between the impact hammer, steel shot, and impact block.

[0027] Figure 5 This is a cross-sectional view in Embodiment 2 of this application used to illustrate the positional relationship between the pressure plate, the steel ball, and the compression spring.

[0028] Explanation of reference numerals in the attached drawings: 1. Chisel rod; 2. Housing; 3. Mounting base; 4. Limiting component; 41. Guide tube; 42. Limiting pin; 5. Rocker arm; 6. Impact hammer; 7. Hydraulic cylinder; 8. Contact sensor; 9. Impact block; 10. Sealing plate; 11. Steel shot; 12. Steel ball; 13. Pressure plate; 14. Base plate; 15. Guide post; 16. Compression spring; 17. Sponge; 18. Anti-detachment block. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0030] This application discloses a hydraulic breaker with a long service life.

[0031] Example 1 Reference Figure 1 and Figure 2 A hydraulic breaker with a long service life includes a housing 2, a mounting base 3 is bolted to the housing 2, and a chisel 1 is vertically slidably inserted through both ends of the mounting base 3. The chisel 1 can be a pointed chisel 1 as in the prior art.

[0032] Reference Figure 2 and Figure 3The mounting base 3 is provided with a limiting member 4 for limiting the vertical sliding distance of the drill rod 1. The limiting member 4 includes a guide tube 41 bolted into the mounting base 3. The guide tube 41 is slidably sleeved on the drill rod 1. The guide tube 41 is located on both sides of the flat groove of the drill rod 1 along the axial direction of the guide tube 41.

[0033] Reference Figure 3 A limiting pin 42 is bolted to the mounting base 3. The limiting pin 42 is used to lock into the flat groove of the drill rod 1. The width of the limiting pin 42 along the axis of the guide tube 41 is less than the length of the flat groove of the drill rod 1 along the axis of the guide tube 41.

[0034] Reference Figure 2 A rocker arm 5 is rotatably connected to the housing 2. An impact hammer 6 is integrally formed on the rocker arm 5. An impact block 9 is bolted to the impact hammer 6. The impact block 9 is used to impact the top of the chisel rod 1. A hydraulic cylinder 7, which is electrically connected to the control system, is rotatably connected to the housing 2. The piston rod of the hydraulic cylinder 7 is rotatably connected to the middle position of the rocker arm 5.

[0035] The control system starts the hydraulic cylinder 7. The piston rod of the hydraulic cylinder 7 quickly pushes the rocker arm 5 to rotate. The rotating rocker arm 5 drives the impact hammer 6 to strike the top of the chisel 1. The bottom of the chisel 1 crushes the object. During this process, the heat generated by the impact will be gradually dissipated during the transfer between the rocker arm 5 and the impact hammer 6, thereby reducing the possibility of the lubricating oil in the hydraulic cylinder 7 heating up, thus achieving the purpose of extending the service life of the breaker.

[0036] Reference Figure 2 A contact sensor 8, which is electrically connected to the control system, is bolted to the housing 2. The side of the impact hammer 6 facing away from the chisel 1 is used to contact the sensing end of the contact sensor 8.

[0037] After the impact hammer 6 strikes the top of the chisel rod 1, the control system activates the piston rod of the hydraulic cylinder 7 to retract. The piston rod of the hydraulic cylinder 7 drives the rocker arm 5 to rotate in the opposite direction. The impact hammer 6 continuously approaches the contact sensor 8 until the sensing end of the contact sensor 8 is triggered. At this time, the control system controls the piston rod of the hydraulic cylinder 7 to stop moving, thus preparing for the next impact hammer 6 to strike the top of the chisel rod 1.

[0038] Reference Figure 2 and Figure 4 The impact hammer 6 is hollow inside and open on one side. A sealing plate 10 is bolted to the open end of the impact hammer 6. The sealing plate 10 is used to seal the open end of the impact hammer 6. An energy-absorbing component for absorbing vibration energy is arranged inside the impact hammer 6. The energy-absorbing component includes steel shot 11 installed inside the impact hammer 6. The steel shot 11 occupies 80% to 90% of the internal space of the impact hammer 6. The remaining space inside the impact hammer 6 is filled with sponge 17.

[0039] When the impact hammer 6 strikes the top of the chisel rod 1, the steel shot 11 inside the impact hammer 6 will bounce rapidly inside the impact hammer 6, and the sponge 17 will deform under the impact of the steel shot 11. During this process, the impact on the impact hammer 6 will be absorbed by the steel shot 11 and the sponge 17, thereby reducing the possibility of the impact hammer 6 bouncing off the top of the chisel rod 1, and thus reducing the possibility of the hydraulic cylinder 7 being damaged by the reaction force of the chisel rod 1, thereby extending the service life of the breaker.

[0040] The implementation principle of Example 1 is as follows: The control system starts the hydraulic cylinder 7, and the piston rod of the hydraulic cylinder 7 quickly pushes the rocker arm 5 to rotate. The rotating rocker arm 5 drives the impact hammer 6 to strike the top of the chisel 1. The bottom of the chisel 1 crushes the object. During this process, the heat generated by the impact will be gradually dissipated during the transfer between the rocker arm 5 and the impact hammer 6, thereby reducing the possibility of the lubricating oil in the hydraulic cylinder 7 heating up, thereby achieving the purpose of extending the service life of the breaker.

[0041] After the impact hammer 6 strikes the top of the chisel rod 1, the control system activates the piston rod of the hydraulic cylinder 7 to retract. The piston rod of the hydraulic cylinder 7 drives the rocker arm 5 to rotate in the opposite direction. The impact hammer 6 continuously approaches the contact sensor 8 until the sensing end of the contact sensor 8 is triggered. At this time, the control system controls the piston rod of the hydraulic cylinder 7 to stop moving, thus preparing for the next impact hammer 6 to strike the top of the chisel rod 1.

[0042] When the impact hammer 6 strikes the top of the chisel rod 1, the steel shot 11 inside the impact hammer 6 will bounce rapidly inside the impact hammer 6, and the sponge 17 will deform under the impact of the steel shot 11. During this process, the impact on the impact hammer 6 will be absorbed by the steel shot 11 and the sponge 17, thereby reducing the possibility of the impact hammer 6 bouncing off the top of the chisel rod 1, and thus reducing the possibility of the hydraulic cylinder 7 being damaged by the reaction force of the chisel rod 1, thereby extending the service life of the breaker.

[0043] Example 2 refer to Figure 5 The difference between this embodiment and embodiment 1 is that: the energy-absorbing component includes several steel balls 12 arranged inside the impact hammer 6, a pressure plate 13 is slidably arranged inside the impact hammer 6, a base plate 14 is welded to the impact hammer 6 on the side of the pressure plate 13 facing away from the steel balls 12, a plurality of guide posts 15 are welded to the pressure plate 13, the guide posts 15 slide through the base plate 14, a compression spring 16 is supported between the pressure plate 13 and the base plate 14, and an anti-detachment block 18 is welded to the end of the guide post 15 facing away from the pressure plate 13.

[0044] The implementation principle of Example 2 is as follows: During the process of the impact hammer 6 rapidly rotating around the rocker arm 5 to impact the drill rod 1, the compression spring 16 presses the pressure plate 13 onto the steel ball 12 through the base plate 14. At this time, the steel ball 12 and the impact hammer 6 form a whole, thereby increasing the impact force of the impact hammer 6 impacting the drill rod 1. When the impact hammer 6 impacts the top of the drill rod 1, the steel ball 12 will push the pressure plate 13 in the opposite direction, and the compression spring 16 will be compressed. Through the jumping of the steel ball 12 at this time and the friction between the steel balls 12, the vibration energy of the impact hammer 6 is absorbed, reducing the possibility of the hydraulic cylinder 7 being damaged by vibration.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hydraulic breaker with a long service life, characterized in that: The device includes a housing (2), on which a mounting base (3) is provided. A drill rod (1) is vertically slidably inserted through both ends of the mounting base (3). A limiting member (4) for limiting the sliding distance of the drill rod (1) is provided on the mounting base (3). A rocker arm (5) is rotatably provided on the housing (2). An impact hammer (6) is provided on the rocker arm (5). The impact hammer (6) is used to impact the top of the drill rod (1). A hydraulic cylinder (7) electrically connected to the control system is rotatably provided on the housing (2). The piston rod of the hydraulic cylinder (7) is rotatably provided on the rocker arm (5).

2. The hydraulic breaker with a long service life according to claim 1, characterized in that: The limiting member (4) includes a guide tube (41) disposed in the mounting base (3). The guide tube (41) is slidably sleeved on the drill rod (1). The guide tube (41) is located on both sides of the flat groove of the drill rod (1) along the axial direction of the guide tube (41). A limiting pin (42) is detachably disposed on the mounting base (3). The limiting pin (42) is used to be locked on the flat groove of the drill rod (1). The width of the limiting pin (42) along the axial direction of the guide tube (41) is smaller than the length of the flat groove of the drill rod (1) along the axial direction of the guide tube (41).

3. The hydraulic breaker with a long service life according to claim 1, characterized in that: The housing (2) is provided with a contact sensor (8) electrically connected to the control system, and the side of the impact hammer (6) facing away from the chisel (1) is used to contact the sensing end of the contact sensor (8).

4. A hydraulic breaker with a long service life according to claim 1, characterized in that: The impact hammer (6) is detachably provided with an impact block (9), which is used to impact the top of the drill rod (1).

5. A hydraulic breaker with a long service life according to claim 1, characterized in that: The impact hammer (6) is hollow inside and open on one side. A sealing plate (10) is detachably provided at the open end of the impact hammer (6). An energy-absorbing component for absorbing vibration energy is provided inside the impact hammer (6).

6. A hydraulic breaker with a long service life according to claim 5, characterized in that: The energy-absorbing element includes steel shot (11) arranged inside the impact hammer (6).

7. A hydraulic breaker with a long service life according to claim 5, characterized in that: The energy-absorbing element includes a plurality of steel balls (12) arranged inside the impact hammer (6).

8. A hydraulic breaker with a long service life according to claim 7, characterized in that: A pressure plate (13) is slidably disposed inside the impact hammer (6). A base plate (14) is disposed on the impact hammer (6) on the side of the pressure plate (13) facing away from the steel ball (12). A guide post (15) is disposed on the pressure plate (13). The guide post (15) slides through the base plate (14). A compression spring (16) supports the pressure plate (13) and the base plate (14).

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