Rotary impact type hydraulic rock drill

Abstract

The invention belongs to the technical field of rock drills, and discloses a rotary impact type hydraulic rock drill. The rock drilling bit group is arranged in one side of the rock drilling machine shell; the rotating mechanism is arranged at the top of the rock drill shell, and the rotating mechanism is located above one side of the rock drill bit set; according to the technical scheme, by arranging the hydraulic mechanism, the cooling and cleaning assembly and the driving assembly, when the hydraulic mechanism is started to make the output end collide with one end of the middle of the rock drilling bit set back and forth, the top of one side of the driving assembly is driven to move up and down back and forth; cold water in one side of the cooling and cleaning assembly can be pumped back and forth into the other side of the cooling and cleaning assembly, and then the cold water can be sprayed out through the other side, so that heat generated by the impact part of the hydraulic mechanism and the rock drilling bit group can be cleaned and cooled; the service life of parts in the rock drill shell is prevented from being influenced by high temperature.

Description

Technical Field

[0001] This invention belongs to the field of rock drilling technology, specifically a rotary impact hydraulic rock drill. Background Technology

[0002] The rotary impact hydraulic rock drill is an advanced rock breaking equipment that combines rotary cutting and high-frequency impact functions. Its core principle is to drive the piston through a hydraulic system to achieve high-frequency reciprocating motion, while an independent rotating mechanism drives the drill bit to rotate, forming a coordinated operation mode of "impact-rotation-drilling".

[0003] Existing rotary impact hydraulic rock drills generate impact force by continuously striking the tail of the drill rod through the output end of the hydraulic device, which is then transmitted to the drill bit to achieve the purpose of rock drilling. However, the continuous impact causes high temperatures at the output end of the hydraulic device and the tail of the drill rod, which reduces the service life of the internal parts of the device. Therefore, improvements are needed. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a rotary impact hydraulic rock drill, which has the advantage of cooling down the heat generated by the impact of the hydraulic device.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rotary impact hydraulic rock drill, further comprising: a rock drill bit assembly disposed inside one side of the rock drill housing; a rotating mechanism disposed on the top of the rock drill housing, and the rotating mechanism being located above one side of the rock drill bit assembly; a hydraulic mechanism disposed on the other side inside the rock drill housing; a cooling and cleaning assembly disposed inside the rock drill housing and located on the top of one side of the hydraulic mechanism; and a drive assembly disposed on the top of the output end of the hydraulic mechanism; wherein, the drive assembly includes a fixed block fixedly mounted on the top of the output end of the hydraulic mechanism, a limiting rail frame disposed on both sides of the top of the fixed block, a sliding rod slidably connected to the inner side of the limiting rail frame, a drive piston rod disposed on the top of the sliding rod, and the top of the drive piston rod extending into the interior of the cold water tank.

[0006] Preferably, the rock drill bit assembly includes a rock drill rod, a buffer spring, and a driven gear; The rock drill rod is movably installed on one side inside the rock drill housing. The surface of the middle part of the rock drill rod is elastically connected to the inner wall of the rock drill housing through a buffer spring. The driven gear is fixedly sleeved on the surface of one end of the rock drill rod.

[0007] Preferably, the rotating mechanism includes a drive gear ring, a drive motor, and a drive gear; The active gear ring is located inside the rock drill housing and outside the driven gear. The drive motor is located inside the rock drill housing and on one side of the top of the driven gear. The active gear is fixedly sleeved on the output end of the drive motor. The inner side of the active gear ring meshes with the surface of the driven gear. The surfaces of the active gear and the active gear ring mesh.

[0008] Preferably, the hydraulic mechanism includes a hydraulic cylinder and a hydraulic piston rod; The hydraulic cylinder is fixedly installed inside one side of the inner cavity of the rock drill housing, and the hydraulic piston rod is movably installed inside the hydraulic cylinder.

[0009] Preferably, the cooling and cleaning assembly includes a cold water tank, a water supply tank, a first one-way valve, a second one-way valve, a connecting pipe, and a spray head; The cold water tank is fixedly installed on the top of the rock drill housing and is located on one side of the active gear ring. The water delivery channel is opened inside the rock drill housing, and the inner wall of the water delivery channel is slidably connected to the top of the drive piston rod. The top of the drive piston rod is elastically connected to the inner wall of the water delivery channel through a connecting spring. One side of the top of the water delivery channel is connected to the cold water tank in one direction through a first one-way valve. The connecting pipe is set at the top of the inner cavity of the rock drill housing and located on one side of the drive piston rod. The top of the water delivery channel is connected to the connecting pipe in one direction through a second one-way valve. The spray head is fixedly connected to the bottom of the connecting pipe.

[0010] Preferably, the bottom of the rock drill housing is provided with a fixed box located below the hydraulic piston rod and the rock drill rod, and a filter drawer is movably installed on the top of the inner cavity of the fixed box.

[0011] Preferably, the bottom of the fixed box is fixedly connected to the top of the cold water tank through a reflux assembly, the reflux assembly including a reflux pipe, a water inlet valve, an air vent valve and a negative pressure fan blade; The return pipe is fixedly connected between the bottom of the fixed box and the middle of the top of the cold water tank. The water inlet valve is located inside the top of the return pipe. The air vent valve is located inside the top of the return pipe and below the water inlet valve. The negative pressure fan blade is movably sleeved inside the return pipe and located below the water inlet valve.

[0012] Preferably, mounting components are provided on both sides of the bottom of the rock drill housing.

[0013] Preferably, a fixed protective shell is provided on one side of the top of the return pipe, and a power assembly is provided inside the fixed protective shell. The power assembly includes a first transmission gear, a second transmission gear, a transmission structure, and a transmission frame. The first transmission gear is movably sleeved inside the fixed protective shell, and the first transmission gear is located on one side of the negative pressure fan blade. The second transmission gear is movably sleeved on the top of one side of the fixed protective shell. The top of the first transmission gear and the bottom of the second transmission gear are connected by a transmission structure. The transmission frame is fixedly installed in the middle of one side of the hydraulic piston rod. The top of the transmission frame extends into the interior of the fixed protective shell and is located outside the second transmission gear.

[0014] Preferably, the surfaces of the first transmission gear and the negative pressure fan blade mesh, and the inner side of the top of the transmission frame meshes with the surface of the second transmission gear.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The above technical solution, by setting up a hydraulic mechanism, a cooling and cleaning component, and a drive component, allows the output end of the hydraulic mechanism to reciprocate and impact one end of the rock drill bit assembly when activated. This simultaneously drives the top of one side of the drive component to move up and down, thereby pumping cold water from one side of the cooling and cleaning component to the other side. The cold water can then be sprayed out from the other side, thus cleaning and cooling the heat generated by the impact between the hydraulic mechanism and the rock drill bit assembly, preventing high temperatures from affecting the service life of the internal parts of the rock drill housing.

[0016] This invention, by setting up a reflux component and a power component, allows the output end of the hydraulic mechanism to reciprocate, driving the entire power component on one side to move back and forth synchronously. The other side of the top of the power component drives the entire other side of the power component to operate, thereby causing the middle part of the top of the reflux component to rotate. This rotation generates negative pressure, which drives the water that has fallen into the fixed box and been filtered by the filter drawer back to the interior of the top of the cooling and cleaning component, achieving water circulation and avoiding water waste while improving water cooling efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A; Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point C; Figure 5 for Figure 2 A magnified view of the structure at point B in the middle; Figure 6This is a schematic diagram of the active gear ring of the present invention; Figure 7 for Figure 6 A schematic diagram of the local structure at point D.

[0018] In the diagram: 1. Rock drill housing; 2. Rock drill bit assembly; 201. Rock drill rod; 202. Buffer spring; 203. Driven gear; 3. Rotating mechanism; 301. Driving gear ring; 302. Drive motor; 303. Driving gear; 4. Hydraulic mechanism; 401. Hydraulic cylinder; 402. Hydraulic piston rod; 5. Cooling and cleaning assembly; 501. Cold water tank; 502. Water supply tank; 503. First check valve; 504. Second check valve; 505. Connecting pipe; 506. Spray head; 6. Drive... 601. Moving component; 602. Fixing block; 603. Limiting track frame; 604. Sliding rod; 605. Driving piston rod; 606. Connecting spring; 7. Fixing box; 8. Filter drawer; 9. Return component; 901. Return pipe; 902. Water inlet valve; 903. Exhaust valve; 904. Negative pressure fan blade; 10. Mounting component; 11. Fixing protective shell; 12. Power component; 1201. First transmission gear; 1202. Second transmission gear; 1203. Transmission structure; 1204. Transmission frame. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 7 As shown, the present invention provides a rotary impact hydraulic rock drill, which further includes: a rock drill bit assembly 2, which is disposed inside one side of the rock drill housing 1; a rotating mechanism 3, which is disposed on the top of the rock drill housing 1 and is located above one side of the rock drill bit assembly 2; a hydraulic mechanism 4, which is disposed on the other side inside the rock drill housing 1; a cooling and cleaning assembly 5, which is disposed inside the rock drill housing 1 and located on the top of one side of the hydraulic mechanism 4; and a drive assembly 6, which is disposed on the top of the output end of the hydraulic mechanism 4. The drive assembly 6 includes a fixed block 601 fixedly mounted on the top of the output end of the hydraulic mechanism 4. Limiting rail frames 602 are provided on both sides of the top of the fixed block 601. A sliding rod 603 is slidably connected to the inner side of the limiting rail frame 602. A drive piston rod 604 is provided on the top of the sliding rod 603, and the top of the drive piston rod 604 extends into the interior of the cold water tank 501.

[0021] When the output end of the hydraulic mechanism 4 moves back and forth, it drives the fixed block 601 to move back and forth as a whole, driving the sliding rod 603 to move up and down along the inner side of the limit track frame 602. This, in turn, drives the top of the drive piston rod 604 to move up and down synchronously on the inner side of the middle of the cooling and cleaning assembly 5. This allows the cold water at the top of the cooling and cleaning assembly 5 to be transported through the middle to the other side and then sprayed out, so as to cool down the high temperature generated by the impact of the hydraulic mechanism 4 and the rock drill bit assembly 2.

[0022] like Figure 2 and Figure 6 As shown, the rock drill bit assembly 2 includes a rock drill rod 201, a buffer spring 202, and a driven gear 203; The rock drill rod 201 is movably installed on one side inside the rock drill housing 1. The surface of the middle part of the rock drill rod 201 is elastically connected to the inner wall of the rock drill housing 1 through the buffer spring 202. The driven gear 203 is fixedly sleeved on the surface of one end of the rock drill rod 201.

[0023] The above solution is adopted: when the rock drill rod 201 is impacted and moves back and forth, it will compress the buffer spring 202. Through the design of the buffer spring 202, the force generated by the impact on the rock drill housing 1 plays a buffering role, avoiding the rock drill housing 1 from being damaged by violent vibration.

[0024] like Figure 2 and Figure 6 As shown, the rotating mechanism 3 includes a drive gear ring 301, a drive motor 302, and a drive gear 303; The active gear ring 301 is disposed inside the rock drill housing 1 and is located outside the driven gear 203. The drive motor 302 is disposed inside the rock drill housing 1 and is located on one side of the top of the driven gear 203. The active gear 303 is fixedly sleeved on the output end of the drive motor 302. The inner side of the active gear ring 301 meshes with the surface of the driven gear 203. The surfaces of the active gear 303 and the active gear ring 301 mesh.

[0025] The above solution is adopted: by setting up a drive gear 303, when the drive motor 302 is started, the output end of the drive motor 302 will drive the drive gear 303 to rotate, which in turn causes the teeth on the surface of the drive gear 303 to drive the teeth on the surface of the drive gear ring 301, thereby driving the drive gear ring 301 to rotate as a whole. This, in turn, can drive the driven gear 203 and the buffer spring 202 on the inner side of the drive gear ring 301 to rotate as a whole, so as to drive the rock drilling rod 201 to rotate and perform rotary impact rock drilling.

[0026] like Figure 2 and Figure 3 As shown, the hydraulic mechanism 4 includes a hydraulic cylinder 401 and a hydraulic piston rod 402; The hydraulic cylinder 401 is fixedly installed inside one side of the inner cavity of the rock drill housing 1, and the hydraulic piston rod 402 is movably installed inside the inner cavity of the hydraulic cylinder 401; The cooling and cleaning assembly 5 includes a cold water tank 501, a water supply tank 502, a first one-way valve 503, a second one-way valve 504, a connecting pipe 505, and a spray head 506. The cold water tank 501 is fixedly installed on the top of the rock drill housing 1, and the cold water tank 501 is located on one side of the active gear ring 301. The water supply channel 502 is opened inside the rock drill housing 1, and the inner wall of the water supply channel 502 is slidably connected to the top of the drive piston rod 604. The top of the drive piston rod 604 is elastically connected to the inner wall of the water supply channel 502 through the connecting spring 605. One side of the top of the water supply channel 502 is unidirectionally connected to the cold water tank 501 through the first one-way valve 503. The connecting pipe 505 is set at the top of the inner cavity of the rock drill housing 1 and located on one side of the drive piston rod 604. The top of the water supply channel 502 is unidirectionally connected to the connecting pipe 505 through the second one-way valve 504. The spray head 506 is fixedly connected to the bottom of the connecting pipe 505.

[0027] Using the above scheme: when the top of the driving piston rod 604 moves downward in the inner cavity of the water tank 502, it will be driven downward by the elastic force of the connecting spring 605. When the top of the driving piston rod 604 moves downward, it will cause a negative pressure to be generated in the inner cavity of the water tank 502. The cold water in the inner cavity of the cold water tank 501 will be introduced into the interior through the first one-way valve 503. Finally, the cold water in the water tank 502 will be pushed upward by the driving piston rod 604 and introduced into the interior of the spray head 506 through the second one-way valve 504 and the connecting pipe 505. This will enable the spray head 506 to spray cold water to cool down the impact parts of the hydraulic piston rod 402 and the rock drill rod 201.

[0028] like Figure 2 As shown, a fixed box 7 is provided at the bottom of the rock drill housing 1, located between the hydraulic piston rod 402 and the rock drill rod 201. A filter drawer 8 is movably installed on the top of the inner cavity of the fixed box 7.

[0029] The above solution, through the design of the filter drawer 8, can filter the sewage generated inside the rock drill rod 201 and hydraulic cylinder 401 during water spraying and cooling.

[0030] like Figure 2 and Figure 5 As shown, the bottom of the fixed box 7 is fixedly connected to the top of the cold water tank 501 through the reflux assembly 9. The reflux assembly 9 includes a reflux pipe 901, an inlet valve 902, an exhaust valve 903, and a negative pressure fan blade 904. The return pipe 901 is fixedly connected between the bottom of the fixed box 7 and the middle of the top of the cold water tank 501. The inlet valve 902 is located inside the top of the return pipe 901. The exhaust valve 903 is located inside the top of the return pipe 901 and below the inlet valve 902. The negative pressure fan blade 904 is movably sleeved inside the return pipe 901 and located below the inlet valve 902.

[0031] The above scheme is adopted: when the negative pressure fan blade 904 rotates, it can generate negative pressure at the bottom of the negative pressure fan blade 904, so that the water at the bottom of the fixed box 7 can be drawn away through the return pipe 901 until it accumulates in the exhaust valve 903. Finally, the accumulated water pressure will squeeze and push the exhaust valve 903 to open downward, so as to achieve the purpose of water returning to the interior of the cold water tank 501.

[0032] like Figure 1 and Figure 2 As shown, mounting parts 10 are provided on both sides of the bottom of the rock drill housing 1.

[0033] Using the above solution, the operator can use the mounting component 10 to install the entire rock drill housing 1 onto the rock drill vehicle body, thereby achieving the purpose of overall installation and fixation of the rock drill housing 1.

[0034] like Figure 2 , Figure 5 and Figure 6 As shown, a fixed protective shell 11 is provided on one side of the top of the return pipe 901. A power assembly 12 is provided inside the fixed protective shell 11. The power assembly 12 includes a first transmission gear 1201, a second transmission gear 1202, a transmission structure 1203, and a transmission frame 1204. The first transmission gear 1201 is movably sleeved inside the fixed protective shell 11, and the first transmission gear 1201 is located on one side of the negative pressure fan blade 904. The second transmission gear 1202 is movably sleeved on the top of one side of the fixed protective shell 11. The top of the first transmission gear 1201 and the bottom of the second transmission gear 1202 are connected by transmission structure 1203. The transmission frame 1204 is fixedly installed in the middle of one side of the hydraulic piston rod 402. The top end of the transmission frame 1204 extends into the interior of the fixed protective shell 11 and is located outside the second transmission gear 1202. The surfaces of the first transmission gear 1201 and the negative pressure fan blade 904 mesh, and the inner side of the top of the transmission frame 1204 meshes with the surface of the second transmission gear 1202.

[0035] Using the above scheme: when the hydraulic piston rod 402 drives the transmission frame 1204 to move back and forth, the inner teeth of the transmission frame 1204 will drive the surface teeth of the second transmission gear 1202 to rotate. Then, the transmission structure 1203 will drive the first transmission gear 1201 to rotate. Finally, the surface teeth of the first transmission gear 1201 will drive the surface teeth of the negative pressure fan blade 904 to rotate, thereby achieving the purpose of driving the negative pressure fan blade 904 to generate negative pressure and pumping away the water at the bottom of the fixed box 7 through the return pipe 901.

[0036] Working principle and usage process of this invention: First, hydraulic oil can circulate in the hydraulic cylinder 401, which can drive the hydraulic piston rod 402 to move back and forth, so that the end of the hydraulic piston rod 402 hits one end of the rock drill rod 201. At the same time, the drive motor 302 is started, which drives the drive gear 303 to drive the drive gear ring 301 to rotate, which in turn drives the driven gear 203 and the rock drill rod 201 to rotate, ultimately achieving the purpose of rotating the rock drill rod 201 to perform rock drilling.

[0037] When the hydraulic piston rod 402 moves back and forth and impacts the end of the rock drill rod 201, the fixed block 601 moves, causing the inner wall of the limiting track frame 602 to press the bottom part of the sliding rod 603. The sliding rod 603 and the driving piston rod 604 move up and down as a whole. When the top of the driving piston rod 604 moves downward in the inner cavity of the water tank 502, a negative pressure is generated at the top of the water tank 502. Through the first one-way valve 503, the cold water inside the cold water tank 501 is transported unidirectionally to the inside of the water tank 502. When the driving piston rod 604 moves upward as a whole, the cold water inside the inner cavity of the water tank 502 is pushed unidirectionally through the second one-way valve 504 and the connecting pipe 505 into the spray head 506. Finally, it is sprayed out through the spray head 506 to achieve cold water spraying and cooling treatment.

[0038] Then, the water that has absorbed heat falls through the filter drawer 8 and into the bottom of the fixed box 7. The reciprocating motion of the hydraulic piston rod 402 simultaneously drives the transmission frame 1204 to move back and forth, causing the inner side of one end of the transmission frame 1204 to mesh with the surface of the second transmission gear 1202, thus rotating the second transmission gear 1202. This, in turn, drives the first transmission gear 1201 to rotate via the transmission structure 1203. Subsequently, the meshing of the first transmission gear 1201 with the surface of the negative pressure fan blade 904 causes the negative pressure fan blade 904 to rotate. The rotation of the negative pressure fan blade 904 creates a negative pressure area at the bottom. This negative pressure acts on the inner cavity of the return pipe 901, drawing water from the bottom of the fixed box 7 to the bottom of the return pipe 901 and the exhaust valve 903. The drawn-out gas is discharged one-way through the water inlet valve 902, while the water presses down to open the exhaust valve 903, allowing the water to flow back into the cold water tank 501. This achieves the purpose of water circulation cooling, greatly improving the utilization rate of water resources. Finally, impurities blocked at the top of the filter drawer 8 can be removed from the fixed box 7 by pulling out the filter drawer 8 for cleaning, facilitating subsequent use.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary impact hydraulic rock drill, comprising a rock drill housing (1), characterized in that: Also includes; Rock drill bit assembly (2), wherein the rock drill bit assembly (2) is disposed inside one side of the rock drill housing (1); Rotating mechanism (3), the rotating mechanism (3) is located on the top of the rock drill housing (1), and the rotating mechanism (3) is located above one side of the rock drill bit assembly (2); Hydraulic mechanism (4), which is located on the other side inside the rock drill housing (1); Cooling and cleaning assembly (5), the cooling and cleaning assembly (5) is disposed inside the rock drill housing (1) and located on the top of the hydraulic mechanism (4) side; A drive assembly (6) is disposed on top of the output end of the hydraulic mechanism (4); The drive assembly (6) is fixedly mounted with a fixed block (601) located at the top of the output end of the hydraulic mechanism (4). Limiting rail frames (602) are provided on both sides of the top of the fixed block (601). A sliding rod (603) is slidably connected to the inner side of the limiting rail frame (602). A drive piston rod (604) is provided at the top of the sliding rod (603). The top of the drive piston rod (604) extends into the interior of the cold water tank (501).

2. The rotary impact hydraulic rock drill according to claim 1, characterized in that: The rock drill bit assembly (2) includes a rock drill rod (201), a buffer spring (202), and a driven gear (203). The rock drill rod (201) is movably installed on one side inside the rock drill housing (1). The surface of the middle part of the rock drill rod (201) is elastically connected to the inner wall of the rock drill housing (1) through a buffer spring (202). The driven gear (203) is fixedly sleeved on the surface of one end of the rock drill rod (201).

3. The rotary impact hydraulic rock drill according to claim 1, characterized in that: The rotating mechanism (3) includes a drive gear ring (301), a drive motor (302), and a drive gear (303). The active gear ring (301) is disposed inside the rock drill housing (1) and is located outside the driven gear (203). The drive motor (302) is disposed inside the rock drill housing (1) and is located on one side of the top of the driven gear (203). The active gear (303) is fixedly sleeved on the output end of the drive motor (302). The inner side of the active gear ring (301) meshes with the surface of the driven gear (203). The surfaces of the active gear (303) and the active gear ring (301) mesh.

4. The rotary impact hydraulic rock drill according to claim 1, characterized in that: The hydraulic mechanism (4) includes a hydraulic cylinder (401) and a hydraulic piston rod (402). The hydraulic cylinder (401) is fixedly installed inside the inner cavity of the rock drill housing (1), and the hydraulic piston rod (402) is movably installed inside the inner cavity of the hydraulic cylinder (401).

5. The rotary impact hydraulic rock drill according to claim 1, characterized in that: The cooling and cleaning assembly (5) includes a cold water tank (501), a water supply tank (502), a first check valve (503), a second check valve (504), a connecting pipe (505), and a spray head (506). The cold water tank (501) is fixedly installed on the top of the rock drill housing (1), and the cold water tank (501) is located on one side of the active gear ring (301). The water delivery channel (502) is opened inside the rock drill housing (1), and the inner wall of the water delivery channel (502) is slidably connected to the top of the drive piston rod (604). The top of the drive piston rod (604) is elastically connected to the inner wall of the water delivery channel (502) by a connecting spring (605). The top side of the water supply tank (502) is connected to the cold water tank (501) in one direction through the first one-way valve (503). The connecting pipe (505) is located at the top of the inner cavity of the rock drill housing (1) and on the side of the drive piston rod (604). The top of the water supply tank (502) is connected to the connecting pipe (505) in one direction through the second one-way valve (504). The spray head (506) is fixedly connected to the bottom of the connecting pipe (505).

6. The rotary impact hydraulic rock drill according to claim 1, characterized in that: The bottom of the rock drill housing (1) is provided with a fixed box (7) located between the hydraulic piston rod (402) and the rock drill rod (201), and a filter drawer (8) is movably installed on the top of the inner cavity of the fixed box (7).

7. The rotary impact hydraulic rock drill according to claim 6, characterized in that: The bottom of the fixed box (7) is fixedly connected to the top of the cold water tank (501) through the return assembly (9). The return assembly (9) includes a return pipe (901), a water inlet valve (902), an exhaust valve (903), and a negative pressure fan blade (904). The return pipe (901) is fixedly connected between the bottom of the fixed box (7) and the middle of the top of the cold water tank (501). The inlet valve (902) is located inside the top of the return pipe (901). The exhaust valve (903) is located inside the top of the return pipe (901) and below the inlet valve (902). The negative pressure fan blade (904) is movably sleeved inside the return pipe (901) and located below the inlet valve (902).

8. The rotary impact hydraulic rock drill according to claim 1, characterized in that: Mounting components (10) are provided on both sides of the bottom of the rock drill housing (1).

9. The rotary impact hydraulic rock drill according to claim 7, characterized in that: A fixed protective shell (11) is provided on one side of the top of the return pipe (901). A power assembly (12) is provided inside the fixed protective shell (11). The power assembly (12) includes a first transmission gear (1201), a second transmission gear (1202), a transmission structure (1203), and a transmission frame (1204). The first transmission gear (1201) is movably sleeved inside the fixed protective shell (11), and the first transmission gear (1201) is located on one side of the negative pressure fan blade (904). The second transmission gear (1202) is movably sleeved on the top of one side of the fixed protective shell (11). The top of the first transmission gear (1201) and the bottom of the second transmission gear (1202) are connected by a transmission structure (1203). The transmission frame (1204) is fixedly installed in the middle of one side of the hydraulic piston rod (402). One side of the top of the transmission frame (1204) extends into the interior of the fixed protective shell (11) and is located outside the second transmission gear (1202).

10. The rotary impact hydraulic rock drill according to claim 9, characterized in that: The surfaces of the first transmission gear (1201) and the negative pressure fan blade (904) mesh with each other, and the inner side of the top of the transmission frame (1204) meshes with the surface of the second transmission gear (1202).

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