A hydraulic breaker with a dust reduction function

Abstract

The present invention provides a hydraulic breaker with a dust reduction function, belonging to the technical field of hydraulic breakers, including a hammer body and a drill rod. A second channel is opened inside the hammer body. One end of the drill rod extends into the second channel, and the other end extends to the bottom of the hammer body. The hydraulic breaker further includes a spray assembly, a main piston rod, a secondary piston rod, and a dust detection assembly. A first channel is also opened inside the hammer body. The main piston rod is arranged inside the second channel and is controlled by a hydraulic system to reciprocate up and down inside the second channel. Compared with the prior art, in the embodiment of the present invention, when the drill rod performs a crushing operation, not only can dust settlement be carried out, but also it can automatically select whether to perform dust reduction according to the amount of dust around the drill rod, thereby avoiding meaningless dust reduction operations when the amount of dust around the drill rod is small, and achieving the purpose of saving water resources.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic breakers, and particularly relates to a hydraulic breaker with a dust reduction function. Background Art

[0002] A hydraulic breaker is an important engineering crushing tool, which is an impact device that converts hydraulic energy into mechanical energy. The hydraulic breaker is installed on a machine and connected to a hydraulic system. High-pressure fluid from the hydraulic system is supplied to the hydraulic breaker to drive the piston rod to reciprocate. When the piston rod strokes, it hits the drill rod at high speed, and the drill rod breaks solids such as walls or the ground to complete the crushing task.

[0003] Currently, when the drill rod of a hydraulic breaker is performing a crushing operation, the drill rod will transmit vibration force to the ground or wall. When there is a lot of dust on the ground or wall, a large amount of dust will be raised along with the vibration, and then gather around the drill rod, obstructing the operator's line of sight and thus affecting the smooth progress of the crushing operation. Summary of the Invention

[0004] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the embodiments of the present invention is to provide a hydraulic breaker with a dust reduction function.

[0005] To solve the above technical problem, the present invention provides the following technical solutions:

[0006] A hydraulic breaker with a dust reduction function includes a hammer body and a drill rod. A second channel is opened inside the hammer body. One end of the drill rod extends into the second channel, and the other end extends to the bottom of the hammer body. It further includes a spray assembly, a main piston rod, a sub-piston rod, and a dust detection assembly;

[0007] A first channel is also opened inside the hammer body. The main piston rod is arranged inside the second channel and is controlled by the hydraulic system to reciprocate up and down inside the second channel;

[0008] The sub-piston rod is arranged inside the first channel and is controlled by the main piston rod to reciprocate up and down inside the first channel;

[0009] The spray assembly is installed at the bottom of the hammer body, and the dust detection assembly is arranged inside the first channel. When the drill rod is performing a crushing operation, the dust detection assembly is used to detect the dust around the drill rod;

[0010] When the dust detection assembly detects less dust, the sub-piston rod performs an air pumping action. When the dust detection assembly detects more dust, the sub-piston rod performs a water pumping action to press out the water source through the spray assembly to achieve dust settlement.

[0011] As a further improvement of the present invention: a water inlet pipe is provided on the side wall of the hammer body. One end of the water inlet pipe is connected to an external water tank, and the other end is communicated with the first channel. A first notch for communicating the first channel with the second channel is opened inside the hammer body. A connecting rod is fixedly provided on the side wall of the auxiliary piston rod. One end of the connecting rod away from the auxiliary piston rod extends into the second channel from the first notch and is fixedly connected to the main piston rod;

[0012] The spraying assembly includes a support pipe and an annular pipe. One end of the support pipe is fixedly connected to the bottom wall of the hammer body and is communicated with the first channel, and the other end is communicated with the annular pipe. The annular pipe is arranged around the outside of the drill rod, and a plurality of spray holes are opened at intervals at the bottom of the annular pipe;

[0013] The dust detection assembly includes a detection pipe and a partition net fixedly arranged inside the detection pipe. The detection pipe is movably arranged inside the first channel. A water inlet hole corresponding to the water inlet pipe is opened on the side wall of the detection pipe, and a check valve is arranged inside the water inlet pipe.

[0014] As a further improvement of the present invention: a one-way valve assembly is further arranged inside the hammer body. When the detection pipe moves upward along the inside of the first channel and the water inlet pipe is communicated with the water inlet hole, the one-way valve assembly is used to cooperate with the upward movement of the auxiliary piston rod to conduct one-way closing of the first channel.

[0015] As a further improvement of the present invention: a second notch is opened on one side of the inside of the hammer body where the first channel is located;

[0016] The one-way valve assembly includes an annular plate, a one-way valve and a second elastic member. The annular plate is movably arranged inside the second notch. One end of the second elastic member is connected to the annular plate, and the other end is connected to the inner wall of the second notch, and is used to provide elastic support for the annular plate. The one-way valve is arranged inside the annular plate.

[0017] As a further improvement of the present invention: a reset assembly is further arranged inside the hammer body. After the drill rod finishes the crushing operation, the reset assembly is used to drive the detection pipe to move downward along the inside of the first channel to realize the reset of the detection pipe.

[0018] As a further improvement of the present invention: the reset assembly includes an annular block and a first elastic member. The annular block is fixedly arranged inside the first channel. One end of the first elastic member is connected to the annular block, and the other end is connected to the detection pipe, and is used to provide elastic support for the detection pipe. A pull rod is also fixedly arranged on the side wall of the annular plate. One end of the pull rod away from the annular plate extends outside the hammer body.

[0019] As a further improvement of the present invention: the first elastic member and the second elastic member are springs or metal shrapnel.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] In the embodiment of the present invention, when crushing operations are required, the hydraulic system is used to control the main piston rod to reciprocate up and down inside the second channel, and then repeatedly impact the drill rod. The drill rod transmits the impact force to the wall or ground to be crushed, thereby realizing the crushing of the wall or ground. When the main piston rod reciprocates up and down inside the second channel, the main piston rod can also drive the auxiliary piston rod to reciprocate up and down inside the first channel. At the same time, the dust detection component is used to detect the dust raised around the drill rod. When the dust detection component detects that the raised dust is less, the auxiliary piston rod only performs the action of pumping air, rather than pumping water; when the dust detection component detects that the raised dust is more, the auxiliary piston rod performs the action of pumping water and presses the water out through the spraying component. After the water is pressed out, it acts on the dust raised around the drill rod, thereby performing sedimentation treatment on the dust to avoid blocking the line of sight of the wall or ground around the drill rod due to excessive dust, enabling the staff to smoothly carry out the crushing operation. Compared with the prior art, when the drill rod is performing crushing operations, not only can dust sedimentation be carried out, but it can also automatically select whether to perform dust reduction according to the amount of dust around the drill rod, thereby avoiding meaningless dust reduction operations when the amount of dust around the drill rod is less, achieving the purpose of saving water resources. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a hydraulic breaker with a dust reduction function;

[0023] Figure 2 It is a schematic structural diagram inside a hydraulic breaker with a dust reduction function;

[0024] Figure 3 It is Figure 2 The enlarged schematic diagram of area A in

[0025] Figure 4 It is Figure 2 The enlarged schematic diagram of area B in

[0026] In the figure: 10 - hammer body, 101 - second channel, 102 - water inlet pipe, 103 - first channel, 104 - first notch, 105 - second notch, 20 - drill rod, 30 - spray assembly, 301 - support pipe, 302 - annular pipe, 303 - spray hole, 40 - main piston rod, 50 - auxiliary piston rod, 501 - connecting rod, 60 - dust detection assembly, 601 - detection pipe, 602 - water inlet hole, 603 - separation net, 70 - reset assembly, 701 - annular stopper, 702 - first elastic member, 80 - one - way valve assembly, 801 - annular plate, 802 - one - way valve, 803 - pull rod, 804 - second elastic member. Detailed implementation manners

[0027] The technical solutions of the present invention will be further described in detail below in conjunction with the specific implementation manners.

[0028] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0029] Please refer to Figure 1 and Figure 2 , this embodiment provides a hydraulic breaker with a dust - reduction function, including a hammer body 10, a drill rod 20, a spray assembly 30, a main piston rod 40, an auxiliary piston rod 50, and a dust detection assembly 60. A first channel 103 and a second channel 101 are opened inside the hammer body 10. One end of the drill rod 20 extends into the second channel 101, and the other end extends to the bottom of the hammer body 10. The main piston rod 40 is arranged inside the second channel 101 and is controlled by a hydraulic system (not shown in the figure) to reciprocate up and down inside the second channel 101. The auxiliary piston rod 50 is arranged inside the first channel 103 and is controlled by the main piston rod 40 to reciprocate up and down inside the first channel 103. The spray assembly 30 is installed at the bottom of the hammer body 10. The dust detection assembly 60 is arranged inside the first channel 103. When the drill rod 20 performs a breaking operation, the dust detection assembly 60 is used to detect the dust around the drill rod 20. When the dust detection assembly 60 detects less dust, the auxiliary piston rod 50 performs an air pumping action. When the dust detection assembly 60 detects more dust, the auxiliary piston rod 50 performs a water pumping action to press out the water source through the spray assembly 30 to achieve dust settlement.

[0030] When crushing operation is required, the hydraulic system is used to control the main piston rod 40 to reciprocate up and down inside the second channel 101, and then repeatedly impact the drill rod 20. The drill rod 20 transmits the impact force to the wall or ground to be crushed, thereby realizing the crushing of the wall or ground. When the main piston rod 40 reciprocates up and down inside the second channel 101, the main piston rod 40 can also drive the auxiliary piston rod 50 to reciprocate up and down inside the first channel 103. At the same time, the dust detection component 60 is used to detect the dust raised around the drill rod 20. When the dust detection component 60 detects less raised dust, the auxiliary piston rod 50 only performs the action of pumping air, rather than pumping water source; when the dust detection component 60 detects more raised dust, the auxiliary piston rod 50 performs the action of pumping water source and presses out the water source through the spraying component 30. After the water source is pressed out, it acts on the dust raised around the drill rod 20, thereby settling the dust to avoid blocking the sight of the wall or ground around the drill rod 20 due to excessive dust, so that the staff can smoothly carry out the crushing operation.

[0031] Please refer to Figure 1 , Figure 2 and Figure 4 , in an embodiment, a water inlet pipe 102 is provided on the side wall of the hammer body 10. One end of the water inlet pipe 102 is connected to an external water tank (not shown in the figure), and the other end is communicated with the first channel 103. A first notch 104 for communicating the first channel 103 with the second channel 101 is opened inside the hammer body 10. A connecting rod 501 is fixedly provided on the side wall of the auxiliary piston rod 50. One end of the connecting rod 501 away from the auxiliary piston rod 50 extends from the first notch 104 to the inside of the second channel 101 and is fixedly connected to the main piston rod 40. The spraying component 30 includes a support pipe 301 and a ring pipe 302. One end of the support pipe 301 is fixedly connected to the bottom wall of the hammer body 10 and is communicated with the first channel 103, and the other end is communicated with the ring pipe 302. The ring pipe 302 is arranged around the outside of the drill rod 20. A plurality of spray holes 303 are opened at the bottom of the ring pipe 302. The dust detection component 60 includes a detection pipe 601 and a partition net 603 fixedly arranged inside the detection pipe 601. The detection pipe 601 is movably arranged inside the first channel 103. A water inlet hole 602 corresponding to the water inlet pipe 102 is opened on the side wall of the detection pipe 601. A check valve (not shown in the figure) is arranged inside the water inlet pipe 102.

[0032] Initially, the detection tube 601 is located inside the first channel 103, and the water inlet hole 602 is positioned below the water inlet pipe 102. The side wall of the detection tube 601 seals the water inlet pipe 102. When the hydraulic system controls the main piston rod 40 to reciprocate up and down inside the second channel 101 and repeatedly impacts the drill rod 20, the main piston rod 40 drives the auxiliary piston rod 50 to reciprocate up and down synchronously inside the first channel 103 through the connecting rod 501. When the auxiliary piston rod 50 moves upward, the auxiliary piston rod 50 extracts the dust and air around the drill rod 20 into the annular pipe 302 through the spray holes 303, and then extracts it into the first channel 103 through the support pipe 301. After the dust and air enter the first channel 103, they pass through the detection tube 601. At this time, the dust is blocked at the bottom of the partition net 603, while the air directly passes through the partition net 603. When the auxiliary piston rod 50 moves downward, the auxiliary piston rod 50 reversely presses the air inside the first channel 103 to the outside through the support pipe 301, the annular pipe 302, and a number of spray holes 303; when there is less dust around the drill rod 20, less dust is blocked at the bottom of the partition net 603. Therefore, the dust cannot cause the blockage of the partition net 603, and thus cannot affect the smooth passage of air through the partition net 603, enabling the auxiliary piston rod 50 to only perform the air pumping action during the up and down movement inside the first channel 103; on the contrary, if there is more dust around the drill rod 20, more dust is blocked at the bottom of the partition net 603, and the more dust will block the partition net 603, resulting in the subsequent air being unable to pass through the partition net 603. At this time, as the auxiliary piston rod 50 moves upward inside the first channel 103, the auxiliary piston rod 50 pulls the detection tube 601 to move upward inside the first channel 103, thereby driving the water inlet hole 602 to move upward, making the water inlet hole 602 communicate with the water inlet pipe 102 correspondingly. During the subsequent up and down movement of the auxiliary piston rod 50, the auxiliary piston rod 50 extracts the water source from the external water tank through the water inlet pipe 102 and the water inlet hole 602 into the detection tube 601, then presses the water source inside the detection tube 601 into the support pipe 301 through the first channel 103, and finally presses the water source out through a number of spray holes 303 at the bottom of the annular pipe 302 to settle the dust around the drill rod 20; when the water source is pressed from inside the detection tube 601 into the first channel 103, the water source can reversely pass through the partition net 603, thereby cleaning the dust at the bottom of the partition net 603, and the cleaned dust is pressed out from the spray holes 303 along with the water source.

[0033] Please refer to Figure 2, in one embodiment, a check valve assembly 80 is further disposed inside the hammer body 10. When the detection tube 601 moves upward along the inside of the first channel 103 and the water inlet pipe 102 communicates with the water inlet hole 602, the check valve assembly 80 is used to cooperate with the upward movement of the secondary piston rod 50 to perform a one-way closing of the first channel 103, so that when the secondary piston rod 50 moves upward along the inside of the first channel 103, the water source in the external water tank can be smoothly extracted into the detection tube 601 through the water inlet pipe 102 and the water inlet hole 602. At the same time, when the secondary piston rod 50 moves downward along the inside of the first channel 103, the water source in the detection tube 601 can be smoothly pressed into the annular tube 302 through the first channel 103 and the support tube 301, so that the water source is smoothly ejected from a plurality of spray holes 303 at the bottom of the annular tube 302.

[0034] Please refer to Figure 4 , in one embodiment, a second notch 105 is formed on one side of the first channel 103 inside the hammer body 10. The check valve assembly 80 includes an annular plate 801, a check valve 802, and a second elastic member 804. The annular plate 801 is movably disposed inside the second notch 105. One end of the second elastic member 804 is connected to the annular plate 801, and the other end is connected to the inner wall of the second notch 105 for providing elastic support to the annular plate 801. The check valve 802 is disposed inside the annular plate 801.

[0035] When there is less dust around the drill rod 20, resulting in less dust blocked at the bottom of the partition net 603, the upward movement of the auxiliary piston rod 50 inside the first channel 103 cannot pull the detection tube 601, so that the detection tube 601 cannot move upward inside the first channel 103. At this time, the auxiliary piston rod 50 only performs the action of pumping air, and the detection tube 601 remains stationary or moves upward a very short distance inside the first channel 103, resulting in the water inlet pipe 102 not being able to communicate with the water inlet hole 602. The entire annular plate 801 is located inside the second notch 105, and the annular plate 801 abuts against the outer wall of the detection tube 601 under the supporting action of the second elastic member 804; when there is more dust around the drill rod 20, resulting in more dust blocked at the bottom of the partition net 603, thus blocking the partition net 603, the upward movement of the auxiliary piston rod 50 inside the first channel 103 can pull the detection tube 601 to move upward inside the first channel 103. When the water inlet hole 602 on the side wall of the detection tube 601 corresponds and communicates with the water inlet pipe 102, the lower end of the detection tube 601 moves above the annular plate 801. At this time, the second elastic member 804 pushes the annular plate 801, so that the annular plate 801 together with the one-way valve 802 inside it extends into the first channel 103. The annular plate 801 acts on the bottom of the detection tube 601 to provide support for the detection tube 601. After that, as the auxiliary piston rod 50 moves up and down inside the first channel 103, when the auxiliary piston rod 50 moves upward, the check valve inside the water inlet pipe 102 opens, and the one-way valve 802 inside the annular plate 801 closes. The auxiliary piston rod 50 pumps the water source in the external water tank through the water inlet pipe 102 and the water inlet hole 602 into the detection tube 601. When the auxiliary piston rod 50 moves downward, the check valve inside the water inlet pipe 102 closes, and the one-way valve 802 inside the annular plate 801 opens. The auxiliary piston rod 50 presses the water source inside the detection tube 601 into the first channel 103, and then is pressed into the annular tube 302 by the support tube 301, and finally is sprayed out through a plurality of spray holes 303 to realize the sedimentation of dust.

[0036] Please refer to Figure 2 and Figure 3 , in one embodiment, a reset assembly 70 is further provided inside the hammer body 10. After the drill rod 20 finishes the crushing operation, the reset assembly 70 is used to drive the detection tube 601 to move downward inside the first channel 103 to realize the reset of the detection tube 601.

[0037] Please refer to Figure 2 , Figure 3 and Figure 4, in one embodiment, the reset assembly 70 includes an annular stopper 701 and a first elastic member 702. The annular stopper 701 is fixedly arranged inside the first channel 103. One end of the first elastic member 702 is connected to the annular stopper 701, and the other end is connected to the detection tube 601, for providing elastic support to the detection tube 601. A pull rod 803 is also fixedly arranged on the side wall of the annular plate 801, and the end of the pull rod 803 away from the annular plate 801 extends outside the hammer body 10.

[0038] After the drill rod 20 finishes the crushing operation, the staff can pull the pull rod 803, thereby driving the annular plate 801 to move reversely to the inside of the second notch 105. The annular plate 801 and the one-way valve 802 are removed from the lower end of the detection tube 601. Subsequently, the first elastic member 702 can push the detection tube 601 to move downward along the inside of the first channel 103, realizing the reset of the detection tube 601.

[0039] In one embodiment, the first elastic member 702 and the second elastic member 804 can be springs or metal shrapnel, and there is no limitation here.

[0040] In the embodiment of the present invention, when a crushing operation needs to be performed, the hydraulic system is used to control the main piston rod 40 to reciprocate up and down along the inside of the second channel 101, and then repeatedly impact the drill rod 20. The drill rod 20 transmits the impact force to the wall or ground to be crushed, thereby realizing the crushing of the wall or ground. When the main piston rod 40 reciprocates up and down along the inside of the second channel 101, the main piston rod 40 can also drive the auxiliary piston rod 50 to reciprocate up and down along the inside of the first channel 103. At the same time, the dust detection assembly 60 is used to detect the dust raised around the drill rod 20. When the dust detection assembly 60 detects that the raised dust is less, the auxiliary piston rod 50 only performs the action of pumping air, rather than pumping water; when the dust detection assembly 60 detects that the raised dust is more, the auxiliary piston rod 50 performs the action of pumping water and presses the water source out through the spraying assembly 30. After the water source is pressed out, it acts on the dust raised around the drill rod 20, thereby performing sedimentation treatment on the dust, so as to avoid blocking the sight of the wall or ground around the drill rod 20 due to the existence of excessive dust, enabling the staff to smoothly perform the crushing operation. Compared with the prior art, when the drill rod 20 performs the crushing operation, not only can dust sedimentation be performed, but also it can be self-selected whether to perform dust reduction according to the amount of dust around the drill rod 20, thereby avoiding meaningless dust reduction operations when the amount of dust around the drill rod 20 is less and realizing the conservation of water resources.

[0041] The above has described the preferred embodiments of the present invention in detail, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A hydraulic breaker with a dust reduction function, comprising a hammer body (10) and a drill rod (20). A second channel (101) is formed inside the hammer body (10). One end of the drill rod (20) extends into the second channel (101), and the other end extends to the bottom of the hammer body (10). It is characterized in that, It further includes a spray assembly (30), a main piston rod (40), a sub-piston rod (50), and a dust detection assembly (60); A first channel (103) is further formed inside the hammer body (10). The main piston rod (40) is arranged inside the second channel (101) and is controlled by a hydraulic system to reciprocate up and down inside the second channel (101); The sub-piston rod (50) is arranged inside the first channel (103) and is controlled by the main piston rod (40) to reciprocate up and down inside the first channel (103); The spray assembly (30) is installed at the bottom of the hammer body (10), and the dust detection assembly (60) is arranged inside the first channel (103). When the drill rod (20) performs a crushing operation, the dust detection assembly (60) is used to detect the dust around the drill rod (20); When the dust detection assembly (60) detects less dust, the sub-piston rod (50) performs an air pumping action. When the dust detection assembly (60) detects more dust, the sub-piston rod (50) performs a water source pumping action to press out the water source through the spray assembly (30) to realize the settlement of dust.

2. The hydraulic breaker with a dust reduction function according to claim 1, characterized in that, A water inlet pipe (102) is arranged on the side wall of the hammer body (10). One end of the water inlet pipe (102) is connected to an external water tank, and the other end is communicated with the first channel (103). A first notch (104) for communicating the first channel (103) with the second channel (101) is formed inside the hammer body (10). A connecting rod (501) is fixedly arranged on the side wall of the sub-piston rod (50). The end of the connecting rod (501) away from the sub-piston rod (50) extends into the second channel (101) from the first notch (104) and is fixedly connected to the main piston rod (40); The spray assembly (30) includes a support pipe (301) and an annular pipe (302). One end of the support pipe (301) is fixedly connected to the bottom wall of the hammer body (10) and is communicated with the first channel (103), and the other end is communicated with the annular pipe (302). The annular pipe (302) is arranged around the outside of the drill rod (20), and a plurality of spray holes (303) are formed at the bottom of the annular pipe (302) at intervals; The dust detection assembly (60) includes a detection pipe (601) and a partition net (603) fixedly arranged inside the detection pipe (601). The detection pipe (601) is movably arranged inside the first channel (103). A water inlet hole (602) corresponding to the water inlet pipe (102) is formed on the side wall of the detection pipe (601), and a check valve is arranged inside the water inlet pipe (102).

3. The hydraulic breaker with a dust reduction function according to claim 2, characterized in that, A one-way valve assembly (80) is further disposed inside the hammer body (10). When the detection tube (601) moves upward along the inside of the first channel (103) and the water inlet pipe (102) communicates with the water inlet hole (602), the one-way valve assembly (80) is used to cooperate with the upward movement of the auxiliary piston rod (50) to close the first channel (103) unidirectionally.

4. A hydraulic breaker with a dust reduction function according to claim 3, characterized in that, A second notch (105) is formed on one side of the first channel (103) inside the hammer body (10); The one-way valve assembly (80) includes an annular plate (801), a one-way valve (802) and a second elastic member (804). The annular plate (801) is movably disposed inside the second notch (105). One end of the second elastic member (804) is connected to the annular plate (801), and the other end is connected to the inner wall of the second notch (105) for providing elastic support to the annular plate (801). The one-way valve (802) is disposed inside the annular plate (801).

5. A hydraulic breaker with a dust reduction function according to claim 4, characterized in that, A reset assembly (70) is further disposed inside the hammer body (10). After the drilling rod (20) finishes the crushing operation, the reset assembly (70) is used to drive the detection tube (601) to move downward along the inside of the first channel (103) to realize the reset of the detection tube (601).

6. The hydraulic breaker with a dust reduction function according to claim 5, characterized in that, The reset assembly (70) includes an annular stopper (701) and a first elastic member (702). The annular stopper (701) is fixedly disposed inside the first channel (103). One end of the first elastic member (702) is connected to the annular stopper (701), and the other end is connected to the detection tube (601) for providing elastic support to the detection tube (601). A pull rod (803) is also fixedly disposed on the side wall of the annular plate (801). The end of the pull rod (803) away from the annular plate (801) extends outside the hammer body (10).

7. The hydraulic breaker with a dust reduction function according to claim 6, characterized in that, The first elastic member (702) and the second elastic member (804) are springs or metal shrapnel.

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