CN116498201A - Hydraulic rock drill - Google Patents

Abstract

The invention discloses a hydraulic rock drill, which comprises a guide assembly, a transmission assembly and an impact assembly, wherein the guide assembly comprises a guide shell and a drill rod, the transmission assembly comprises a gear box shell, a driven gear, a transmission gear and a driving gear, the impact assembly comprises an impact flow distribution shell, an impact piston rod, a flow distribution valve and a push rod, a rotary driver is arranged outside the impact flow distribution shell, the tail end of the guide shell is connected with the head end of the gear box shell, the tail end of the gear box shell is connected with the head end of the impact flow distribution shell, the tail end of the drill rod is inserted into the gear box shell and connected with the driven gear, the head end of the impact piston rod is inserted into the gear box shell and props against the tail end of the drill rod, and the rotary driver is connected with the driving gear. The impact piston rod is prevented from being pulled or broken under the action of radial load, so that maintenance work is facilitated, and further, hydraulic oil pushes the end face of the impact piston rod to generate axial thrust through the flow distribution valve and the push rod during work, so that the radial load is reduced, and stable and reliable operation of equipment is ensured.

Description

Hydraulic rock drill

Technical Field

The invention relates to the field of rock drilling equipment, in particular to a hydraulic rock drill.

Background

The hydraulic rock drill is an important construction device in the field of tunneling and mining, and utilizes a reversing valve to enable a hydraulic oil to drive an impact piston rod to continuously strike the tail end of a drill rod, so that impact stress is generated and transmitted to a drill bit and rock interface to generate a rock breaking effect.

The existing hydraulic rock drill mostly adopts a core valve flow distribution structure, a multi-section shell is arranged, all parts are respectively installed in the shell, and due to the fact that the number of the shell sections is large, long bolts are used for connection, and under the action of high-frequency vibration, the long bolts are easy to fatigue and deform to have a loosening phenomenon, so that a piston is subjected to a strain or fracture phenomenon under the action of radial load, and the reliability of the rock drill is affected. Further, the impact piston of the core valve type hydraulic rock drill is directly matched with the shell, and the shell needs to be replaced after the matching surface is damaged, so that the cost is high. More importantly, the hydraulic reversing valve of the flow distribution part of the core valve flow distribution hydraulic rock drill is an asymmetric oil port, hydraulic oil radially enters the inside of the shell and flows in the axial direction to push the piston, so that a larger radial load is generated, the stable operation of the flow distribution valve is ensured, the requirements on the processing precision of the valve core and the valve body are high, and the overall operation reliability is general.

Therefore, how to provide a stable and reliable hydraulic rock drill is a technical problem that the person skilled in the art is currently required to solve.

Disclosure of Invention

The invention aims to provide a hydraulic rock drill, which is formed by connecting three components in sequence along the axial direction, so that long bolts are avoided, an impact piston rod is arranged in the impact component at the tail end, the disassembly, the installation and the replacement of parts are convenient, meanwhile, the end face of the impact piston rod is pushed by a flow distribution valve and a push rod, the radial load is reduced, and the stable and reliable operation of equipment is ensured.

In order to solve the technical problems, the invention provides a hydraulic rock drill, which comprises a guide assembly, a transmission assembly and an impact assembly, wherein the guide assembly, the transmission assembly and the impact assembly are sequentially connected along the axial direction, the guide assembly comprises a guide shell and a drill rod which axially penetrates through the guide shell, the transmission assembly comprises a gear box shell, a driven gear, a transmission gear and a driving gear which are installed in the gear box shell and are sequentially connected, the impact assembly comprises an impact flow distribution shell, an impact piston rod, a flow distribution valve and a push rod, the impact piston rod, the flow distribution valve and the push rod are installed in the impact flow distribution shell and are sequentially contacted along the axial direction, the head end of the push rod is inserted into the tail end opening of the flow distribution valve, the flow distribution valve head end is provided with a flow distribution hole for conveying hydraulic oil to the tail end face of the impact piston rod, a rotary driver is installed outside the impact flow distribution shell, the tail end of the guide shell is connected with the head end of the gear box shell, the tail end of the gear box shell is connected with the head end of the impact flow distribution shell, the tail end of the drill rod is inserted into the gear box shell and is connected with the driven gear.

Preferably, the guide assembly further comprises a quick-change water injection sleeve and a holding sleeve which are coaxially arranged, the quick-change water injection sleeve is inserted by the head end of the axial through hole in the guide shell, the holding sleeve is inserted by the tail end of the axial through hole in the guide shell, the drill rod sequentially axially penetrates through the holding sleeve and the quick-change water injection sleeve, an axially extending central hole is formed in the drill rod, and radial water passing holes which are sequentially communicated are formed in the guide shell, the quick-change water injection sleeve and the tail of the drill rod, and the radial water passing holes at the tail of the drill rod are communicated with the central hole of the drill rod.

Preferably, a plurality of water seals are sequentially arranged on the inner wall of the central hole of the quick-change water filling sleeve along the axial direction, a plurality of water seal leakage observation holes respectively connected with the water seals are arranged on the outer wall of the guide shell, and the head ends of the water seal leakage observation holes are inclined towards the drill rod.

Preferably, the periphery of the head end of the quick-change water injection sleeve is provided with a limiting step, a locking gasket is arranged between the limiting step and the head end face of the guide shell, and the outer wall of the tail end of the quick-change water injection sleeve is in threaded connection with the axial through hole of the guide shell.

Preferably, the tail of the drill rod is connected with an inner hole of the driven gear through a spline structure, outer teeth of the driven gear are meshed with outer teeth of the transmission gear, the inner hole of the transmission gear is connected with a transmission rod of an inner gear ring through a spline structure, outer teeth of the driving gear are meshed with the inner gear ring, the transmission gear is coaxially arranged with the inner gear ring, the driven gear is coaxially arranged with the drill rod, and the axes of the driven gear and the transmission gear are radially staggered.

Preferably, a stop sleeve is arranged at the tail end of the axial through hole in the gearbox shell, and the head end of the impact piston rod passes through the central hole of the stop sleeve.

Preferably, an end cover plate is detachably mounted at the tail end of the impact flow distribution shell so as to close the tail end opening of the axial through hole in the impact flow distribution shell, an upper cylinder body and a lower cylinder body which are axially arranged are mounted at the axial through hole in the impact flow distribution shell, two ends of the impact piston rod respectively penetrate through the central holes of the upper cylinder body and the lower cylinder body, a piston table in the middle of the impact piston rod is positioned at the joint of the upper cylinder body and the lower cylinder body, and oil conveying holes which are distributed around the central holes and are used for conveying oil to the tail end surface of the piston table are arranged in the lower cylinder body.

Preferably, a lubricating oil gas channel communicated with the inside of the gearbox shell is arranged in the impact flow distribution shell.

Preferably, a first cylindrical boss is arranged on the tail end surface of the guide shell, the first cylindrical boss is in sealing connection with the head end opening of the axial through hole in the gearbox shell, a second cylindrical boss is arranged on the tail end surface of the gearbox shell, and the second cylindrical boss is in sealing connection with the head end opening of the axial through hole in the impact flow distribution shell.

Preferably, the end of the guide shell is provided with a first flange platform, the first flange platform is in bolt connection with the head end face of the gearbox shell, the end of the gearbox shell is provided with a second flange platform, and the second flange platform is in bolt connection with the head end face of the impact flow distribution shell.

The invention provides a hydraulic rock drill, which comprises a guide assembly, a transmission assembly and an impact assembly which are sequentially connected along the axial direction, wherein the guide assembly comprises a guide shell and a drill rod which axially penetrates through the guide shell, the transmission assembly comprises a gear box shell, a driven gear, a transmission gear and a driving gear which are arranged in the gear box shell and are sequentially connected, the impact assembly comprises an impact flow distribution shell, an impact piston rod, a flow distribution valve and a push rod which are arranged in the impact flow distribution shell and are sequentially contacted along the axial direction, the head end of the push rod is inserted into an end opening of the flow distribution valve, the head end of the flow distribution valve is provided with a flow distribution hole for conveying hydraulic oil to the end face of the impact piston rod, a rotary driver is arranged outside the impact flow distribution shell, the end of the guide shell is connected with the head end of the gear box shell, the end of the gear box shell is connected with the head end of the impact flow distribution shell, the tail end of the drill rod is inserted into the gear box shell and is connected with the driven gear, the head end of the impact piston rod is inserted into the gear box shell and is propped against the tail end of the drill rod, and the rotary driver is connected with the driving gear.

The guide component, the transmission component and the impact component are sequentially connected along the axial direction, long bolt connection in the prior art is replaced in a way of being connected respectively, the loosening phenomenon of long bolt fatigue deformation is prevented, and the impact piston rod is prevented from being pulled or broken under the action of radial load. The impact piston rod is arranged in the impact assembly at the tail end, only the impact assembly is required to be disassembled when the parts are replaced by disassembly and installation, and the impact piston rod can be taken out after the complete machine is not required to be completely disassembled, so that maintenance work is facilitated.

Drawings

Fig. 1 is a schematic view of a hydraulic rock drill according to an embodiment of the present invention;

fig. 2 is a schematic front view of an embodiment of a hydraulic rock drill according to the present invention;

fig. 3 is a schematic structural view of a guide assembly in an embodiment of the hydraulic rock drill according to the present invention;

fig. 4 is a front cross-sectional view of a guide assembly of an embodiment of a hydraulic rock drill according to the present invention;

FIG. 5 is a schematic view of a transmission assembly in an embodiment of a hydraulic rock drill according to the present invention;

FIG. 6 is a front cross-sectional view of a transmission assembly of one embodiment of a hydraulic rock drill provided by the present invention;

FIG. 7 is a schematic view of the impact assembly of one embodiment of the hydraulic rock drill provided by the present invention;

FIG. 8 is a front cross-sectional view of an impact assembly of one embodiment of a hydraulic rock drill provided by the present invention;

fig. 9 is a top cross-sectional view of an impact assembly in one embodiment of a hydraulic rock drill provided by the present invention.

The hydraulic oil seal leakage inspection device comprises a guide assembly 1, a guide shell 11, a drill rod 12, a quick-change water injection jacket 13, a holding sleeve 14, a water seal leakage observation hole 15, a first flange table 16, a transmission assembly 2, a gear box shell 21, a driven gear 22, a transmission gear 23, an inner gear ring 24, a retaining sleeve 25, a second flange table 26, an impact assembly 3, an impact distributing shell 31, an impact piston rod 32, a distributing valve 33, a push rod 34, an end cover plate 35, an upper cylinder body 36, a lower cylinder body 37, an oil delivery hole 38 and a hydraulic motor 39.

Detailed Description

The core of the invention is to provide a hydraulic rock drill, which is formed by connecting three components in sequence along the axial direction, so that long bolts are avoided, an impact piston rod is arranged in the impact component at the tail end, the disassembly, the installation and the replacement of parts are convenient, meanwhile, the end face of the impact piston rod is pushed by a flow distribution valve and a push rod, the radial load is reduced, and the stable and reliable operation of equipment is ensured.

In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a hydraulic rock drill according to an embodiment of the present invention; fig. 2 is a schematic front view of an embodiment of the hydraulic rock drill according to the present invention.

The invention provides a hydraulic rock drill, which comprises a guide component 1, a transmission component 2 and an impact component 3 which are sequentially connected along the axial direction, wherein the guide component 1 is positioned at the head end of the transmission component 2, the impact component 3 is positioned at the tail end of the transmission component 2, the left end of each component is the head end in the drawing, and the right end is the tail end. The guide assembly 1 comprises a drill rod 12, the impact assembly 3 comprises an impact piston rod 32 and a rotary driver, the transmission assembly 2 is respectively connected with the guide assembly 1 and the impact assembly 3, the impact piston rod 32 pushes the tail end of the drill rod 12 to axially move, the impact piston rod 32 impacts the drill rod 12 according to a certain frequency, so that hydraulic energy is converted into mechanical energy, rock is impacted and crushed, and meanwhile, the rotary driver rotates the drill rod 12 around the axis of the rotary driver through the transmission assembly 2. The rotary actuator may be a hydraulic motor 39 or an electric motor, or the like.

The guide component 1, the transmission component 2 and the impact component 3 are sequentially connected along the axial direction, long bolt connection in the prior art is replaced by a mode of respectively connecting, the loosening phenomenon caused by fatigue deformation of the long bolts is prevented, and the impact piston rod 32 is prevented from being pulled or broken under the action of radial load. The impact piston rod 32 is arranged in the impact assembly 3 at the extreme end, and only the impact assembly 3 is required to be disassembled when the parts are replaced, and the impact piston rod 32 can be taken out without completely disassembling the whole machine, so that maintenance work is facilitated.

Specifically, the guide assembly 1 comprises a guide shell 11 and a drill rod 12, an axial through hole is formed in the guide shell 11, the drill rod 12 penetrates through the axial through hole to axially penetrate through the guide shell 11, the transmission assembly 2 comprises a gear box shell 21, and a driven gear 22, a transmission gear 23 and a driving gear which are installed in the gear box shell 21, and all the gears are sequentially connected to realize rotary transmission from a rotary driver to the drill rod 12. More importantly, the impact assembly 3 comprises an impact flow distribution shell 31, an impact piston rod 32, a flow distribution valve 33 and a push rod 34, wherein the impact piston rod 32, the flow distribution valve 33 and the push rod 34 are installed in the impact flow distribution shell 31 and sequentially contact along the axial direction, the head end of the push rod 34 is inserted into the tail end opening of the flow distribution valve 33, the head end of the flow distribution valve 33 is provided with a flow distribution hole, the flow distribution holes are communicated with two ends of the flow distribution hole, and hydraulic oil can be conveyed to the tail end face of the impact piston rod 32. Further, a rotary driver is installed outside the impact flow distribution housing 31, the tail end of the guide housing 11 is connected with the head end of the gear box housing 21, the tail end of the gear box housing 21 is connected with the head end of the impact flow distribution housing 31, the tail end of the drill rod 12 is inserted into the gear box housing 21 and connected with the driven gear 22, the head end of the impact piston rod 32 is inserted into the gear box housing 21 and abuts against the tail end of the drill rod 12, and the rotary driver is connected with a driving gear.

In the initial state, the end face of the impact piston rod 32 is attached to the head end face of the flow distribution valve 33, the flow distribution hole is further plugged, the push rod 34 is pushed to move towards the head end after hydraulic oil enters, so that the flow distribution valve 33 and the end face of the impact piston rod 32 are pushed to move towards the head end along the axial direction, after the hydraulic oil moves to a certain position, the end face of the impact piston rod 32 is separated from the head end face of the flow distribution valve 33, the flow distribution hole is communicated, hydraulic oil reaches and pushes the end face of the impact piston rod 32 through the flow distribution hole, axial thrust is generated, the impact piston rod 32 continues to move towards the head end along the axial direction, radial load is reduced, and stable and reliable operation of equipment is ensured.

Referring to fig. 3 and 4, fig. 3 is a schematic structural view of a guide assembly in an embodiment of a hydraulic rock drill according to the present invention; fig. 4 is a front cross-sectional view of a guide assembly in one embodiment of a hydraulic rock drill according to the present invention.

In the hydraulic rock drill provided by the specific embodiment of the invention, the guide assembly 1 further comprises a quick-change water injection sleeve 13 and a holding sleeve 14 which are coaxially arranged, the quick-change water injection sleeve 13 and the holding sleeve 14 are both arranged in axial through holes in the guide shell 11, the quick-change water injection sleeve 13 is inserted from the head end of the axial through holes in the guide shell 11, the holding sleeve 14 is inserted from the tail end of the axial through holes in the guide shell 11, the drill rod 12 sequentially axially penetrates through the holding sleeve 14 and the quick-change water injection sleeve 13, so that the drill rod 12 moves back and forth in the central holes of the holding sleeve 14 and the quick-change water injection sleeve 13 when moving axially, the drill rod 12 is internally provided with the central holes extending axially, and the radial water holes are respectively arranged at the tail parts of the guide shell 11, the quick-change water injection sleeve 13 and the drill rod 12 and are communicated with the central holes of the drill rod 12. The radial water passing holes of all the parts are sequentially communicated, so that flushing water sequentially passes through the radial water passing holes at the tail parts of the guide shell 11, the quick-change water injection sleeve 13 and the drill rod 12, finally enters the central hole of the drill rod 12 and is conveyed to the head end of the drill rod 12, and the slag washing and cooling effects are achieved.

Further, a plurality of water seals are sequentially arranged on the inner wall of the central hole of the quick-change water injection sleeve 13 along the axial direction, the water seals are positioned between the inner wall of the central hole of the quick-change water injection sleeve 13 and the outer wall of the drill rod 12, meanwhile, a plurality of water seal leakage observation holes 15 are arranged on the outer wall of the guide shell 11, the water seal leakage observation holes 15 are respectively connected with the water seals and are used for observing the state of each water seal, and the head ends of the water seal leakage observation holes 15 are obliquely folded towards the drill rod 12. So as to prevent the sewage carrying rock scraps from entering the inside of the rock drill shell through the water seal leakage observation hole 15 when the rock drill punches upwards.

In order to ensure stable connection of all the components, a limiting step is arranged on the periphery of the head end of the quick-change water injection sleeve 13, the tail end surface of the limiting step abuts against the head end surface of the guide shell 11, and a locking gasket is arranged between the limiting step and the head end surface of the guide shell 11. A guide copper sleeve is arranged in a central hole of the quick-change water injection sleeve 13 near the head end, and is sleeved on the periphery of the drill rod 12, so that an anti-abrasion effect is realized. The outer wall of the tail end of the quick-change water injection sleeve 13 is provided with external threads, the axial through hole of the guide shell 11 is internally provided with internal threads, and the external threads and the internal threads are connected through threads.

Referring to fig. 5 and 6, fig. 5 is a schematic structural diagram of a transmission assembly in an embodiment of a hydraulic rock drill according to the present invention; fig. 6 is a front cross-sectional view of a transmission assembly in one embodiment of a hydraulic rock drill provided by the present invention.

In the hydraulic rock drill provided by the specific embodiment of the invention, two circular tables are respectively arranged on two sides of the driven gear 22, two bearings are respectively arranged on the two sides of the driven gear 22, the gear box shell 21 supports the driven gear 22 and ensures stable rotation of the driven gear 22, a bushing is arranged in the gear box shell 21, the bearings are connected with the bushing, the tail part of the drill rod 12 and the inner hole of the driven gear 22 are connected through a spline structure, an inner gear ring 24 is also arranged in the gear box shell 21, the head end of the inner gear ring 24 is connected with a transmission rod which extends axially, the transmission rod is connected with the inner hole of the transmission gear 23 through the spline structure, the middle part of the transmission rod is sleeved with the bearings to support the transmission gear 23 and the inner gear ring 24, the transmission gear 23 and the inner gear ring 24 are coaxially arranged, the driven gear 22 and the drill rod 12 are coaxially arranged, the driven gear 22 and the axis of the transmission gear 23 are radially staggered, the outer teeth of the driven gear 22 are meshed with the outer teeth of the transmission gear 23, the output shaft of the rotary driver is connected with the driving gear through the spline structure, the outer teeth of the driving gear are meshed with the inner gear ring 24, and in the working process, the hydraulic motor 39 drives the driving gear to rotate, and further drives the inner gear 24 and the transmission gear 23 to rotate synchronously, and the driven gear 22 and the driven gear 23 to rotate, and finally, and the driven gear 22 is driven by the transmission gear 12 to rotate. A central step hole is formed in the bottom of the inner spline hole of the driving gear and is used for installing a limiting block, and one side end face of the limiting block 317 is connected with the end face of an output shaft of the hydraulic motor 39 to prevent the limiting block from generating axial movement.

Further, a retaining sleeve 25 is mounted at the end of the axial through hole in the gear case housing 21, and the head end of the impact piston rod 32 passes through the central hole of the retaining sleeve 25 and abuts against the end surface of the drill rod 12. In addition, the axial distance between the impact piston rod 32 and the output shaft of the rotary driver corresponds to the axial distance between the retaining sleeve 25 and the inner gear ring 24, so that the impact piston rod 32 is aligned with the retaining sleeve 25 during installation, and the output shaft of the rotary driver is aligned with the inner gear ring 24, thereby being convenient and quick to install.

Referring to fig. 7 to 8, fig. 7 is a schematic structural view of an impact assembly in an embodiment of a hydraulic rock drill according to the present invention; FIG. 8 is a front cross-sectional view of an impact assembly of one embodiment of a hydraulic rock drill provided by the present invention; fig. 9 is a top cross-sectional view of an impact assembly in one embodiment of a hydraulic rock drill provided by the present invention.

In the hydraulic rock drill according to the embodiment of the present invention, the end cover plate 35 is detachably mounted at the end of the impact distribution housing 31 to close the end opening of the axial through hole in the impact distribution housing 31, and specifically, the impact distribution housing 31 and the end cover plate 35 may be connected by bolts, or screwed connection, snap connection, or the like, which is within the scope of the present invention. Further, an upper cylinder body 36 and a lower cylinder body 37 which are arranged along the axial direction are arranged in an axial through hole in the impact flow distribution shell 31, the impact piston rod 32, the upper cylinder body 36 and the lower cylinder body 37 are coaxially arranged, two ends of the impact piston rod 32 respectively penetrate through center holes of the upper cylinder body 36 and the lower cylinder body 37, and a piston table in the middle of the impact piston rod 32 is positioned at the joint of the upper cylinder body 36 and the lower cylinder body 37. The impact piston rod 32 adopts a cylindrical step structure, the diameter of the largest cylinder of the impact piston rod 32 is equivalent to the diameter of a matching hole in the lower cylinder body 37, when the impact piston rod 32 needs to be taken out, only the end cover plate 35 needs to be detached, then the impact piston rod 32 is taken out from the tail end opening of the impact flow distribution shell 31, and the impact piston rod 32 can be taken out without completely disassembling the whole machine, so that maintenance work is facilitated.

Preferably, a plurality of oil delivery holes 38 distributed around the central hole are arranged in the lower cylinder body 37, the oil delivery holes 38 tend to extend axially, so that after the impact piston rod 32 moves to a specific position, hydraulic oil is delivered through the oil delivery holes 38 and pushes the tail end surface of the piston table to generate axial thrust, the impact piston rod 32 continues to move towards the head end along the axial direction, the radial load is reduced, and stable and reliable operation of equipment is ensured. The pilot control valve of the sleeve valve type hydraulic rock drill is utilized to control the impact piston rod 32 of the secondary step to reciprocate, so that the impact piston rod 32 impacts the tail end of the drill rod 12 according to a certain frequency, thereby converting the hydraulic energy into mechanical energy and enabling the rock to be impacted and broken.

In order to ensure smooth operation of the components, a lubrication oil gas passage communicating with the inside of the gear case housing 21 is provided in the impingement distribution housing 31. Specifically, the impact flow distribution shell 31 is provided with a lubricating oil gas channel, lubricating oil gas flows into the inner gear ring 24 from the bearing of the driving gear, enters the inner cavity of the gear box shell 21 through small holes on the end surface of the inner gear ring 24 to lubricate the driven gear 22 and the transmission gear 23, flows into oil gas holes of the quick-change water injection sleeve 13 and the guide copper sleeve from a hole flow channel on the end surface of the guide shell 11, and flows out from a clearance between the matching surfaces of the guide copper sleeve and the drill rod 12. In order to lubricate the parts which can move relatively in the above way and ensure the sealing effect, corresponding sealing elements are required to be arranged at each joint.

On the basis of the hydraulic rock drill provided by the above embodiments, the end face of the guiding housing 11 is provided with a first cylindrical boss, the first cylindrical boss is in sealing connection with the head end opening of the axial through hole in the gear housing 21, the end face of the gear housing 21 is provided with a second cylindrical boss, and the second cylindrical boss is in sealing connection with the head end opening of the axial through hole in the impact flow distribution housing 31, so as to ensure the sealing effect.

Further, a first flange table 16 is arranged at the tail end of the guide shell 11, the first flange table 16 is attached to and connected with the head end face of the gear box shell 21 through bolts, a second flange table 26 is arranged at the tail end of the gear box shell 21, and the second flange table 26 is attached to and connected with the head end face of the impact flow distribution shell 31 through bolts. The number and layout of the bolts can be adjusted according to the situation, or other connection modes can be adopted, and the invention is within the protection scope of the invention. The hydraulic rock drill is symmetrically designed according to the longitudinal section of the rock drill, so that the tail part of the rock drill only needs to be provided with one set of hydraulic pipeline connector, and therefore, the left arm installation and the right arm installation of one rock drill can be realized, and only the rock drill needs to be turned 180 degrees around the central axis of the rock drill.

The hydraulic rock drill provided by the invention is described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims (10)

1. The utility model provides a hydraulic rock drill, its characterized in that includes guiding assembly (1), drive assembly (2) and the impact assembly (3) that connect gradually along the axial, guiding assembly (1) include guiding housing (11) and axial run through drill rod (12) of guiding housing (11), drive assembly (2) include gear box casing (21) and install in driven gear (22), drive gear (23) and the driving gear that connect gradually in gear box casing (21), impact assembly (3) include impact join in marriage flow casing (31) and install in impact join in marriage flow casing (31) in and along the impact piston rod (32), join in marriage flow valve (33) and push rod (34) that contact gradually of axial, push rod (34) head end inserts join in marriage flow valve (33) end opening, be provided with be used for to impact piston rod (32) terminal surface carry hydraulic oil join in marriage flow hole, install rotary actuator outside impact join in marriage flow casing (31), gear box casing (21) are connected to the end of guiding housing (11) is terminal, gear box casing (21) head end is connected to the end of the gear box casing (21) is connected to the end of impact rod (21) is inserted, end (21) is connected to the end of the drill rod (12), the head end of the impact piston rod (32) is inserted into the gear box shell (21) and abuts against the tail end of the drill rod (12), and the rotary driver is connected with the driving gear.

2. The hydraulic rock drill according to claim 1, characterized in that the guide assembly (1) further comprises a quick-change water injection sleeve (13) and a holding sleeve (14) which are coaxially arranged, the quick-change water injection sleeve (13) is inserted from the head end of the axial through hole in the guide shell (11), the holding sleeve (14) is inserted from the tail end of the axial through hole in the guide shell (11), the drill rod (12) sequentially axially penetrates through the holding sleeve (14) and the quick-change water injection sleeve (13), an axially extending central hole is arranged in the drill rod (12), the guide shell (11), the quick-change water injection sleeve (13) and the tail of the drill rod (12) are sequentially communicated with radial water through holes, and the radial water through holes at the tail of the drill rod (12) are communicated with the central hole of the drill rod (12).

3. The hydraulic rock drill according to claim 2, wherein a plurality of water seals are sequentially arranged on the inner wall of the central hole of the quick-change water injection sleeve (13) along the axial direction, a plurality of water seal leakage observation holes (15) respectively connected with a plurality of water seals are arranged on the outer wall of the guide shell (11), and the head end of the water seal leakage observation hole (15) is inclined towards the drill rod (12).

4. A hydraulic rock drill according to claim 3, characterized in that the periphery of the head end of the quick-change water injection sleeve (13) is provided with a limiting step, a locking gasket is arranged between the limiting step and the head end face of the guide shell (11), and the outer wall of the tail end of the quick-change water injection sleeve (13) is in threaded connection with the axial through hole of the guide shell (11).

5. Hydraulic rock drill according to claim 1, characterized in that the tail of the drill rod (12) is connected with the inner hole of the driven gear (22) through a spline structure, the outer teeth of the driven gear (22) are meshed with the outer teeth of the transmission gear (23), the inner hole of the transmission gear (23) is connected with the transmission rod of the ring gear (24) through a spline structure, the outer teeth of the driving gear are meshed with the ring gear (24), the transmission gear (23) and the ring gear (24) are coaxially arranged, the driven gear (22) and the drill rod (12) are coaxially arranged, and the axes of the driven gear (22) and the transmission gear (23) are radially staggered.

6. A hydraulic rock drill according to claim 5, characterized in that the end of the axial through-hole in the gearbox housing (21) is fitted with a retaining sleeve (25), the head end of the impact piston rod (32) passing through the central hole of the retaining sleeve (25).

7. Hydraulic rock drill according to claim 1, characterized in that the end of the impulse-distributing casing (31) is detachably provided with an end cover plate (35) to close the end opening of the axial through-hole in the impulse-distributing casing (31), the axial through-hole in the impulse-distributing casing (31) is provided with an upper cylinder (36) and a lower cylinder (37) arranged in the axial direction, both ends of the impulse piston rod (32) respectively pass through the central holes of the upper cylinder (36) and the lower cylinder (37), the piston table in the middle of the impulse piston rod (32) is located at the joint of the upper cylinder (36) and the lower cylinder (37), and oil delivery holes (38) distributed around the central holes and used for delivering oil to the end surfaces of the piston table are arranged in the lower cylinder (37).

8. Hydraulic rock drill according to claim 7, characterized in that the percussion flow distribution housing (31) is provided with lubrication oil and gas channels communicating with the inside of the gearbox housing (21).

9. Hydraulic rock drill according to any one of claims 1-8, characterized in that the end face of the guide housing (11) is provided with a first cylindrical boss, which is in sealing connection with the head end opening of the axial through hole in the gearbox housing (21), and that the end face of the gearbox housing (21) is provided with a second cylindrical boss, which is in sealing connection with the head end opening of the axial through hole in the impulse distribution housing (31).

10. Hydraulic rock drill according to claim 9, characterized in that the end of the guiding housing (11) is provided with a first flange table (16), the first flange table (16) is bolted to the front end face of the gearbox housing (21), the end of the gearbox housing (21) is provided with a second flange table (26), the second flange table (26) is bolted to the front end face of the impulse distribution housing (31).