Hydraulic breaking hammer with good safety performance

Abstract

This application relates to the field of crushing equipment, and in particular to a hydraulic breaker with good safety performance, comprising a housing, a buffer, and an anti-detachment component. A mounting base is provided on the housing, and a chisel is vertically slidably mounted on the mounting base. The mounting base has a mounting groove for vertical sliding of the chisel. A striking component is provided on the housing to drive the chisel's sliding movement. A connecting rod slidably passes through the chisel, and a rod groove is provided on the chisel for the connecting rod to enter. The length direction of the connecting rod is perpendicular to the axis of the chisel. An avoidance groove is provided on the mounting base for the connecting rod to slide. The anti-detachment component prevents the connecting rod from detaching from the chisel, and the buffer absorbs the impact force between the connecting rod and the mounting base. This application improves the service life and safety 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 good safety performance. 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] A typical drill rod usually consists of three parts: the drill bit, the drill rod, and the drill shank. The drill shank usually has a flat groove.

[0004] In existing technology, hydraulic breakers mainly use the reciprocating motion of the piston rod of the hydraulic cylinder to strike the chisel, thereby enabling the chisel to break solid objects. The chisel is usually attached to the housing of the breaker by two metal connecting rods that are clamped into the flat groove on the chisel tail.

[0005] During the process of breaking ore or concrete with a chisel, sometimes the ore has already been broken, but due to the operator's perspective, they may still operate the hydraulic cylinder's extension rod to strike the chisel. This phenomenon is called "dry firing" of a hydraulic breaker. Dry firing has little impact on the hydraulic breaker when it is done infrequently, but as the hydraulic breaker is used for a long time and at high frequency, the number and frequency of dry firing will increase. The high-speed impact of the chisel on the connecting rod can easily cause the contact area between the connecting rod and the flat groove of the chisel tip to deform continuously. In severe cases, it can cause the connecting rod to lose its restraining function, meaning the chisel will detach from the breaker's housing, which is a defect. Utility Model Content

[0006] To address the issue of the chisel detaching from the traditional hydraulic breaker, this application provides a hydraulic breaker with improved safety performance.

[0007] This application provides a hydraulic breaker with good safety performance, which adopts the following technical solution: A hydraulic breaker with good safety performance includes a housing, a buffer, and an anti-detachment component. The housing has a mounting base, and a chisel is vertically slidably mounted on the mounting base. The mounting base has a mounting groove for vertical sliding of the chisel. The housing has a striking component for driving the chisel to slide. A connecting rod slidably passes through the chisel, and the chisel has a rod groove for the connecting rod to enter. The length direction of the connecting rod is perpendicular to the axis of the chisel. The mounting base has a clearance groove for the sliding of the connecting rod. The anti-detachment component prevents the connecting rod from detaching from the chisel. The buffer absorbs the impact force between the connecting rod and the mounting base.

[0008] By adopting the above technical solution, the anti-detachment component prevents the connecting rod from detaching from the drill rod, and the sliding fit between the connecting rod and the clearance groove on the mounting base prevents the drill rod from detaching from the mounting base during the sliding process. When the drill rod is subjected to dry-firing, the buffer component absorbs the impact force between the connecting rod and the mounting base, reducing the possibility of deformation of the connecting rod and helping to extend the service life of the hydraulic breaker.

[0009] Optionally, the housing has a housing groove communicating with the clearance groove, and the connecting rod extends into the housing groove.

[0010] By adopting the above technical solution, it is convenient for workers to disassemble the connecting rod through the shell groove, thereby reducing the difficulty of workers replacing the drill rod. At the same time, the shell can withstand the impact force from the connecting rod, reducing the impact force of the connecting rod on the mounting base, thereby improving the safety of the equipment.

[0011] Optionally, the buffer includes a rubber strip disposed in the clearance groove of the mounting base, the connecting rod is used to impact the rubber strip, and one end of the rubber strip away from the chisel extends to the housing groove.

[0012] By adopting the above technical solution, when the drill rod is fired without contact with the ground, the connecting rod will impact the rubber strip. The rubber strip will absorb the impact force of the connecting rod by deforming, thereby reducing the possibility of direct impact between the connecting rod and the clearance groove on the mounting base, and at the same time reducing the possibility of deformation of the connecting rod.

[0013] Optionally, the anti-detachment component includes a baffle and a locking bolt, the locking bolt being used to fix the baffle to the housing, and the baffle being used to block the housing groove.

[0014] By adopting the above technical solution, the possibility of separation between the connecting rod and the drill rod is reduced.

[0015] Optionally, the striking element includes a rocker arm rotatably mounted on the housing, with an impact hammer at one end of the rocker arm away from its rotation center. The impact hammer is used to strike the top of the chisel. A hydraulic cylinder electrically connected to the control system is rotatably mounted on the housing, and the piston rod of the hydraulic cylinder is rotatably connected to the rocker arm.

[0016] By adopting the above technical solution, the control system starts the hydraulic cylinder, the piston rod of the hydraulic cylinder extends rapidly, the piston rod of the hydraulic cylinder pushes the rocker arm to rotate, and the rotating rocker arm drives the impact hammer to strike the top of the chisel, thereby achieving the effect of the chisel breaking the object. In this process, the direct contact between the piston rod of the hydraulic cylinder and the chisel is reduced, thereby reducing the possibility that the heat generated by the impact at the top of the chisel is directly transferred to the piston rod of the hydraulic cylinder, and reducing the possibility that the lubricating oil in the hydraulic cylinder will heat up.

[0017] Optionally, the housing is provided with an upper limit plate, and the upper limit plate is provided with a contact switch electrically connected to the control system. The side of the impact hammer facing away from the top of the chisel is used to trigger the sensing end of the contact switch.

[0018] By adopting the above technical solution, after the chisel is struck, the control system restarts the hydraulic cylinder. The piston rod of the hydraulic cylinder retracts, and the piston rod drives the impact hammer to rotate in the opposite direction through the rocker arm until the impact hammer triggers the contact switch. At this time, the control system stops the hydraulic cylinder, thus preparing for the impact hammer to strike the chisel again.

[0019] Optionally, the impact hammer includes a gravity block and an impact block. The gravity block is disposed on the rocker arm, and the impact block is detachably disposed on the gravity block. The impact block is used to impact the top of the chisel rod, and the hardness of the impact block is greater than that of the gravity block.

[0020] By adopting the above technical solution, workers can reduce maintenance costs by replacing the impact block.

[0021] Optionally, a sleeve is detachably provided on the mounting base, and the sleeve is slidably fitted onto the drill rod.

[0022] By adopting the above technical solution, workers can perform maintenance by replacing the sleeve, which helps to reduce the maintenance cost of the mounting base. At the same time, the sleeve can guide the sliding of the drill rod.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. The anti-detachment component prevents the connecting rod from detaching from the chisel. The sliding fit between the connecting rod and the clearance groove on the mounting base prevents the chisel from detaching from the mounting base during sliding. When the chisel is dry-firing, the buffer absorbs the impact force between the connecting rod and the mounting base, reducing the possibility of deformation of the connecting rod and helping to extend the service life of the hydraulic breaker. 2. When the drill rod is driven without contact with the ground, the connecting rod will impact the rubber strip. The rubber strip will absorb the impact force of the connecting rod by deforming, thereby reducing the possibility of direct impact between the connecting rod and the clearance groove on the mounting base, and at the same time, reducing the possibility of deformation of the connecting rod. 3. The control system starts the hydraulic cylinder, and the piston rod of the hydraulic cylinder extends rapidly. The piston rod of the hydraulic cylinder pushes the rocker arm to rotate. The rotating rocker arm drives the impact hammer to strike the top of the chisel, thereby achieving the effect of the chisel breaking the object. In this process, the direct contact between the piston rod of the hydraulic cylinder and the chisel is reduced, thereby reducing the possibility that the heat generated by the impact at the top of the chisel is directly transferred to the piston rod of the hydraulic cylinder, and reducing the possibility that the lubricating oil in the hydraulic cylinder will heat up. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0025] Figure 2 This is a structural schematic diagram illustrating the positional relationship between the mounting base, the chisel, and the impact hammer in the embodiments of this application.

[0026] Figure 3 This is a cross-sectional view used in the embodiments of this application to illustrate the positional relationship between the sleeve, the drill rod, and the connecting rod.

[0027] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Buffer; 21. Rubber strip; 3. Anti-detachment component; 31. Baffle; 32. Locking bolt; 4. Mounting base; 5. Chisel; 6. Mounting groove; 7. Striking component; 71. Rocker arm; 72. Impact hammer; 721. Gravity block; 722. Impact block; 73. Hydraulic cylinder; 8. Connecting rod; 9. Rod groove; 10. Clearance groove; 11. Housing groove; 12. Upper limit plate; 13. Contact switch; 14. Sleeve. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0029] This application discloses a hydraulic breaker with good safety performance.

[0030] Reference Figure 1 , Figure 2 and Figure 3 A hydraulic breaker with good safety performance includes a housing 1, a buffer 2 and an anti-detachment component 3. A mounting base 4 is arranged on the housing 1, and a chisel 5 is vertically slidably arranged on the mounting base 4. The mounting base 4 has a mounting groove 6 for vertical sliding of the chisel 5. A sleeve 14 is bolted to the mounting groove 6 of the mounting base 4 and is slidably sleeved on the chisel 5.

[0031] Reference Figure 1 , Figure 2 and Figure 3A connecting rod 8 is slidably inserted through the drill rod 5. A rod groove 9 is provided on the drill rod 5 for the connecting rod 8 to enter. The length direction of the connecting rod 8 is perpendicular to the axis direction of the drill rod 5. A clearance groove 10 is provided on the mounting base 4 for the connecting rod 8 to slide. A shell groove 11 is provided on the housing 1 that communicates with the clearance groove 10. The end of the connecting rod 8 extends into the shell groove 11 of the housing 1.

[0032] Reference Figure 1 , Figure 2 and Figure 3 The buffer 2 is used to absorb the impact force between the connecting rod 8 and the mounting base 4. The buffer 2 includes a rubber strip 21 bolted into the relief groove 10 of the mounting base 4. The rubber strip 21 can be made of hard rubber in the prior art. The connecting rod 8 is used to impact the rubber strip 21. The end of the rubber strip 21 away from the drill rod 5 extends to the shell groove 11.

[0033] Reference Figure 1 The anti-detachment component 3 is used to prevent the connecting rod 8 from detaching from the drill rod 5. The anti-detachment component 3 includes a baffle 31 and a locking bolt 32. The locking bolt 32 is used to fix the baffle 31 to the housing 1. The baffle 31 is used to block the housing groove 11.

[0034] The worker first inserts the drill rod 5 into the sleeve 14, then rotates the drill rod 5 to connect the rod groove 9 on the drill rod 5 with the clearance groove 10 and the shell groove 11. After that, the worker inserts the connecting rod 8 into the rod groove 9 on the drill rod 5 in sequence through the shell groove 11 on the housing 1 and the clearance groove 10 on the mounting base 4. Finally, the baffle 31 blocks the shell groove 11 on the housing 1 through the baffle 31 and the locking bolt 32, thus completing the installation process of the drill rod 5.

[0035] Reference Figure 2 The housing 1 is provided with a striking element 7 for driving the drill rod 5 to slide. The striking element 7 includes a rocker arm 71 rotatably connected to the housing 1. An impact hammer 72 is provided at the end of the rocker arm 71 away from its rotation center. The impact hammer 72 includes a gravity block 721 and an impact block 722. The gravity block 721 is integrally formed on the rocker arm 71. The impact block 722 is bolted to the gravity block 721. The impact block 722 is used to impact the top of the drill rod 5. The hardness of the impact block 722 is greater than the hardness of the gravity block 721.

[0036] Reference Figure 2 A hydraulic cylinder 73, which is electrically connected to the control system, is rotatably connected to the housing 1. The piston rod of the hydraulic cylinder 73 is rotatably connected to the rocker arm 71. An upper limit plate 12 is welded to the housing 1. A contact switch 13, which is electrically connected to the control system, is bolted to the upper limit plate 12. The side of the impact hammer 72 facing away from the top of the chisel 5 is used to trigger the sensing end of the contact switch 13.

[0037] When the control system activates the hydraulic cylinder 73, the piston rod of the hydraulic cylinder 73 extends rapidly, pushing the rocker arm 71 to rotate. The rotating rocker arm 71 drives the impact hammer 72 to strike the top of the chisel 5. During this process, the rocker arm 71 and the impact hammer 72 prevent direct contact between the chisel 5 and the piston rod of the hydraulic cylinder 73, thereby reducing the possibility that the heat generated by the impact on the top of the chisel 5 will be directly transferred to the piston rod of the hydraulic cylinder 73, thus preventing the lubricating oil in the hydraulic cylinder 73 from heating up.

[0038] When dry firing occurs, the connecting rod 8 will directly impact the rubber strip 21. The rubber strip 21 absorbs the impact force from the connecting rod 8 by deforming, thereby changing the hard contact between the connecting rod 8 and the mounting base 4 into a flexible contact, thus reducing the possibility of the connecting rod 8 deforming due to impact.

[0039] The implementation principle of a hydraulic breaker with good safety performance according to the present application embodiment is as follows: The worker first inserts the chisel 5 into the sleeve 14, then rotates the chisel 5 so that the groove 9 on the chisel 5 is connected to the clearance groove 10 and the shell groove 11. Then, the worker inserts the connecting rod 8 into the groove 9 on the chisel 5 in sequence through the shell groove 11 on the housing 1 and the clearance groove 10 on the mounting base 4. Finally, the baffle 31 blocks the shell groove 11 on the housing 1 through the baffle 31 and the locking bolt 32, thereby completing the installation process of the chisel 5.

[0040] When the control system activates the hydraulic cylinder 73, the piston rod of the hydraulic cylinder 73 extends rapidly, pushing the rocker arm 71 to rotate. The rotating rocker arm 71 drives the impact hammer 72 to strike the top of the chisel 5. During this process, the rocker arm 71 and the impact hammer 72 prevent direct contact between the chisel 5 and the piston rod of the hydraulic cylinder 73, thereby reducing the possibility that the heat generated by the impact on the top of the chisel 5 will be directly transferred to the piston rod of the hydraulic cylinder 73, thus preventing the lubricating oil in the hydraulic cylinder 73 from heating up.

[0041] When dry firing occurs, the connecting rod 8 will directly impact the rubber strip 21. The rubber strip 21 absorbs the impact force from the connecting rod 8 by deforming, thereby changing the hard contact between the connecting rod 8 and the mounting base 4 into a flexible contact, thus reducing the possibility of the connecting rod 8 deforming due to impact.

[0042] 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 good safety performance, characterized in that: The device includes a housing (1), a buffer (2), and an anti-detachment component (3). The housing (1) is provided with a mounting base (4), on which a drill rod (5) is vertically slidably mounted. The mounting base (4) has a mounting groove (6) for the drill rod (5) to slide vertically. The housing (1) is provided with a striking component (7) for driving the drill rod (5) to slide. A connecting rod (8) is slidably passed through the drill rod (5). The drill rod (5) has a rod groove (9) for the connecting rod (8) to enter. The length direction of the connecting rod (8) is perpendicular to the axis direction of the drill rod (5). The mounting base (4) has a clearance groove (10) for the connecting rod (8) to slide. The anti-detachment component (3) is used to prevent the connecting rod (8) from detaching from the drill rod (5). The buffer (2) is used to absorb the impact force between the connecting rod (8) and the mounting base (4).

2. The hydraulic breaker with good safety performance according to claim 1, characterized in that: The housing (1) has a housing groove (11) that communicates with the clearance groove (10), and the connecting rod (8) extends into the housing groove (11) of the housing (1).

3. The hydraulic breaker with good safety performance according to claim 2, characterized in that: The buffer (2) includes a rubber strip (21) disposed in the clearance groove (10) of the mounting base (4), the connecting rod (8) is used to impact the rubber strip (21), and one end of the rubber strip (21) away from the drill rod (5) extends to the shell groove (11).

4. A hydraulic breaker with good safety performance according to claim 2, characterized in that: The anti-detachment component (3) includes a baffle (31) and a locking bolt (32). The locking bolt (32) is used to fix the baffle (31) on the housing (1). The baffle (31) is used to block the housing groove (11).

5. A hydraulic breaker with good safety performance according to claim 1, characterized in that: The striking element (7) includes a rocker arm (71) rotatably mounted on the housing (1), and an impact hammer (72) is provided at one end of the rocker arm (71) away from its rotation center. The impact hammer (72) is used to strike the top of the chisel (5). A hydraulic cylinder (73) electrically connected to the control system is rotatably mounted on the housing (1), and the piston rod of the hydraulic cylinder (73) is rotatably connected to the rocker arm (71).

6. A hydraulic breaker with good safety performance according to claim 5, characterized in that: The housing (1) is provided with an upper limit plate (12), and the upper limit plate (12) is provided with a contact switch (13) electrically connected to the control system. The side of the impact hammer (72) facing away from the top of the chisel (5) is used to trigger the sensing end of the contact switch (13).

7. A hydraulic breaker with good safety performance according to claim 5, characterized in that: The impact hammer (72) includes a gravity block (721) and an impact block (722). The gravity block (721) is disposed on the rocker arm (71), and the impact block (722) is detachably disposed on the gravity block (721). The impact block (722) is used to impact the top of the chisel (5), and the hardness of the impact block (722) is greater than that of the gravity block (721).

8. A hydraulic breaker with good safety performance according to claim 1, characterized in that: A sleeve (14) is detachably provided on the mounting base (4), and the sleeve (14) is slidably sleeved on the drill rod (5).

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