CN216922009U - Hydraulic rock drill with return beating function - Google Patents

Abstract

The utility model relates to a related device of a hydraulic rock drill, in particular to a hydraulic rock drill with a back beating function, which comprises a drill shank, a piston and a pull rod device, wherein the drill shank is arranged at the front part of a machine body, the piston is arranged at the rear part of the machine body, an annular boss is arranged at the middle part of the outer wall of the drill shank, the pull rod device comprises a back beating front sleeve, a back beating back pad, a connecting rod and a return spring, the connecting rod is respectively and fixedly connected with the back beating front sleeve and the back beating back pad, the back beating front sleeve is positioned in front of the annular boss and movably sleeved on the outer wall of the drill shank, the back beating back pad is arranged right behind the piston, the return spring is sleeved on the outer wall of the drill shank, the front end surface of the return spring is abutted against a front end cover of the machine body, the back end surface of the back beating front sleeve is abutted against the back beating front sleeve, and a guide mechanism for guiding the pull rod mechanism to move forwards and backwards is also arranged on the machine body Large impact force, small volume, good maintainability, etc.

Description

Hydraulic rock drill with return beating function

Technical Field

The utility model relates to a related device of a hydraulic rock drill, in particular to a hydraulic rock drill with a return beating function.

Background

The hydraulic rock drill is widely applied to the fields of tunnel construction, blast furnace ironmaking tap hole opening and the like, and comprises a piston, a drill rod, a rotary driving mechanism and other auxiliary mechanisms for cooling, dust removal, lubrication and the like. The piston of the existing hydraulic rock drill is arranged at the rear end of the drill bit shank, the piston can only drill the rear end surface of the drill bit shank in front, and the hydraulic rock drill of the type can not realize the functions of back drilling and back drilling. The existing hydraulic rock drill with the back-beating function is shown in figure 5, a piston of the existing hydraulic rock drill is sleeved on the outer wall of the middle part of a drill shank, an annular boss is arranged at the rear end of the drill shank, when a drill hole is drilled, the piston impacts the rear end face of a drill rod sleeve to realize forward pushing of a drill rod, when a drill rod is clamped, the drill shank moves forwards relative to the piston, the annular boss at the rear end of the drill shank enters the stroke of the piston, the rear end face of the piston repeatedly impacts the front end face of the annular boss to realize back-beating of the drill shank, and therefore the drill rod is separated from constraint of working media after the drill shank retreats. The existing hydraulic rock drill with the back beating function has the following defects: firstly, because the piston is sleeved on the outer wall of the drill bit shank, the piston and the drill bit shank move relatively at high speed, the requirement on the concentricity of the piston and the drill bit shank is high, and because the drill bit shank is in high-impact and high-frequency vibration under a high-temperature (such as a blast furnace taphole) and high-pressure environment during rock drilling, after a guide copper sleeve of the drill bit shank is worn, the drill bit shank is easy to deflect in movement, and further the piston is damaged by pulling to influence impact, so that faults are easy to occur, and the service life is influenced; the drill bit shank of the existing rock drill with the back beating function penetrates through the whole machine body and is very long in the axial direction, the drill bit shank vibrates at high speed in work, in order to ensure reliable strength, the drill bit shank must be configured with a very large diameter to be matched with the length of the drill bit shank, and the diameter of a piston must be very large as the piston is sleeved on the outer wall of the drill bit shank, so that the radial size of the machine body is increased, the size of the rock drill is large and heavy, and the difficulty in disassembly and maintenance is increased; and thirdly, the drill rod sleeve is inconvenient to replace, the drill rod sleeve cannot be knocked out in an empty mode, and the drill rod sleeve is difficult to replace.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a hydraulic rock drill with a piston and a drill shank separated and a return beating function, which has the advantages of strong and reliable rotating torque, low failure rate, reliable work, large impact force, small volume, good maintainability and the like.

The technical scheme for achieving the aim comprises the following contents.

A hydraulic rock drill with a back striking function comprises a drill bit shank and a piston arranged in an inner cavity of a machine body, wherein the front part of the drill bit shank extends out of a central hole of a front end cover of the machine body, the hydraulic rock drill further comprises a pull rod device, the drill bit shank is arranged in the front part of the machine body, the piston is arranged in the rear part of the machine body, a front striking gap is formed between the front end surface of the piston and the rear end surface of the drill bit shank, an annular boss is arranged in the middle of the outer wall of the drill bit shank, a limiting boss is arranged on the inner wall of the front part of the machine body and is positioned behind the annular boss, the pull rod device comprises a back striking front sleeve, a back striking rear pad, a connecting rod and a reset spring, the connecting rod is parallel to the axial direction of the piston, the front end and the rear end of the connecting rod are respectively fixedly connected with the back striking front sleeve and the back pad, the back striking front sleeve is positioned in front of the annular boss and movably sleeved on the outer wall of the drill bit shank, the back striking rear pad is arranged right behind the piston, a back clearance is formed between the rear end surface of the piston and the back striking rear pad, the reset spring is sleeved on the outer wall of the drill shank, the front end face of the reset spring is abutted against the front end cover of the machine body, the rear end face of the reset spring is abutted against the return trip front sleeve, and the machine body is further provided with a guide mechanism for guiding the pull rod mechanism to move back and forth.

Further, a buffer cushion block is further arranged between the limiting boss and the annular boss, the buffer cushion block is sleeved on the outer wall of the drill rod tail and is arranged to play a buffer role, the limiting boss on the machine body is protected favorably, the phenomenon that the annular boss directly collides with the limiting boss to damage the machine body is avoided, and the service life of the machine body can be prolonged favorably after the buffer cushion block is damaged.

The drill bit further comprises a water atomizing device, the water atomizing device comprises a water pipe connector and a water jacket sleeve, the water jacket sleeve is fixed on the inner wall of the machine body and is sleeved with the outer wall of the drill bit tail, the water pipe connector is connected with the opening on the side wall of the machine body, through holes are formed in the side wall of the water jacket sleeve and the side wall of the drill bit tail, the through holes in the side wall of the water jacket sleeve are opposite to the opening on the side wall of the machine body, a water containing cavity is formed between the inner wall of the water jacket sleeve and the outer wall of the drill bit tail, and the through holes in the side wall of the water jacket sleeve and the through holes in the side wall of the drill bit tail are communicated with the water containing cavity. The cooling water enters the water containing cavity through the water pipe joint, and when the drill bit shank vibrates in the front and back directions, the through holes on the side wall of the drill bit shank move in the water containing cavity without departing from the axial range of the water containing cavity, so that the cooling water is ensured to continuously enter a water pipeline at the center of the drill bit shank and directly reach the tail end of the drill rod for atomization, and the drill rod and the drill bit shank are cooled.

Furthermore, the water seal sleeve is arranged between the buffer cushion block and the limiting boss, so that the impact of the drill shank to the machine body is further buffered, and the service life of the machine body is prolonged.

Further, the guide mechanism comprises a longitudinal groove arranged on the outer wall of the machine body, the longitudinal groove is parallel to the axial direction of the piston, and the connecting rod is arranged in the longitudinal groove in a matched mode. The longitudinal groove guides the connecting rod to move back and forth along the axial direction, so that the pull rod device can run more stably.

Further, guiding mechanism is including setting up the rectangular hole at the organism rear end, the direction in rectangular hole is parallel with the axial of piston, it sets up at rectangular downthehole to return to beat the back pad adaptation. The long holes guide and connect the back cushion to move back and forth, so that the pull rod device can run more stably.

Furthermore, the connecting rods are arranged in two numbers and symmetrically arranged on two sides of the machine body. A suitable number of connecting rods both ensures sufficient strength and reduces the structural complexity of the rock drilling machine.

Furthermore, a heat-radiating longitudinal through hole is formed in the center of the piston; so as to be beneficial to prolonging the service life of the piston.

Furthermore, the connecting rod is connected with the back beating front sleeve and the back beating back pad through a thread mechanism. The threaded mechanism is convenient to disassemble and assemble in a connecting mode, and the maintainability is good.

When the hydraulic rock drill is used, a drill rod is connected with the front end of a drill rod tail through a drill rod sleeve, the front end face of a piston impacts the rear end face of the drill rod tail to realize forward drilling when the drill rod is clamped by a working medium, when drill rod clamping occurs, a machine body is pulled backwards and moves forwards relative to the drill rod tail, an annular boss of the drill rod tail pushes a return drilling front sleeve to move forwards, a front drilling clearance is increased and is out of the range of a piston stroke, meanwhile, a connecting rod drives a return drilling rear pad to move forwards synchronously, the rear drilling clearance is reduced, the return drilling rear pad enters the range of the piston stroke, the rear end face of the piston repeatedly impacts the front end face of the return drilling rear pad, the return drilling rear pad retreats relative to the machine body, the connecting rod with the return drilling front sleeve retreats, the rear end face of the return drilling front sleeve repeatedly impacts the front end face of the annular boss, so that the drill rod tail retreats relative to the machine body, and the drill rod with the drill rod retreats from the working medium.

The hydraulic rock drill of the utility model utilizes the draw bar device, adopts the structure that the piston is separated from the drill bit shank to realize the return drilling function, when the piston is drilled forwards, the piston directly impacts the rear end surface of the drill bit shank, compared with the prior art, the fault that the drill bit shank pulls the piston cannot occur, the working reliability is strong, the piston with larger mass can be adopted without increasing the size of the machine body, thereby generating larger impact force on the drill bit shank, the rock drilling is better, the drill bit shank is shorter, the torque transmission is more effective, the rotating torque is stronger, the return drilling front sleeve has the tendency of retreating under the action of the reset spring, when the drill bit is drilled in idle, the rear end surface of the return drilling front sleeve is tightly abutted against the front end surface of the annular boss, the rear end surface of the drill bit shank is always in the range of the piston stroke, the drill bit shank is reversely rotated, the rear end surface of the piston idle drilling drill bit shank can shake loose the drill rod sleeve, and the drill rod sleeve is automatically dismounted from the drill bit shank.

Drawings

Fig. 1 is a schematic external shape diagram of a hydraulic rock drill with a backhander function according to an embodiment;

FIG. 2 is a diagram of the internal structure of a hydraulic rock drill with a kickback function according to an embodiment;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a schematic structural diagram of a hydraulic rock drill with a backhand function in a backhand working state according to the embodiment;

fig. 5 is a schematic structural diagram of a hydraulic rock drill with a backhander function in the prior art.

In the figure, 1, a drill shank; 1-1, annular boss; 2. a piston; 3. a drill rod sleeve; 4. a drill stem; 5. a pull rod device; 5-1, back beating the front sleeve; 5-2, connecting rod; 5-3, back padding; 6. a reset spring; 7. a body; 7-1, longitudinal grooves; 7-2. long holes; 7-3, limiting the boss; 8. buffering cushion blocks; 9. a water jacket; 9-1. water containing cavity; 10. a water pipe joint.

Detailed Description

The present invention will be described in detail with reference to examples. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, a hydraulic rock drill with a back-beating function comprises a drill rod sleeve 1, a piston 2 arranged in an inner cavity of a machine body 7, a water atomization device and a pull rod device 5, when in use, the front end and the back end of the drill rod sleeve 3 are respectively and rotatably sleeved with the back end of a drill rod 4 and the front end of the drill rod sleeve 1, the drill rod sleeve 1 is arranged at the front part of the machine body 7, the front part of the drill rod sleeve 1 extends out of a central hole of a front end cover of the machine body 7, the piston 2 is arranged at the back part of the machine body 7, a front-beating gap is arranged between the front end surface of the piston 2 and the back end surface of the drill rod sleeve 1, an annular boss 1-1 is arranged at the middle part of the outer wall of the drill rod sleeve 1, the pull rod device 5 comprises a back-beating front sleeve 5-1, a back-beating pad 5-3, a connecting rod 5-2 and a reset spring 6, the connecting rod 5-2 is parallel to the axial direction of the piston 2, the front end and the back end are respectively connected with the back sleeve 5-1 and the back pad 5-3 through threads, the connecting rod 5-2 is parallel to the axial direction of the piston 2, the connecting rod 5-2 of the embodiment is provided with two connecting rods which are symmetrically arranged at two sides of the machine body 7, a back striking front sleeve 5-1 is positioned in front of the annular boss 1-1 and movably sleeved on the outer wall of the drill rod tail 1, a back striking back pad 5-3 is arranged right behind the piston 2, a back striking clearance is arranged between the back end surface of the piston 2 and the back striking back pad 5-3, a reset spring 6 is sleeved on the outer wall of the drill rod tail 1, the front end surface of the reset spring 6 is abutted against the front end cover of the machine body 7, the back end surface of the back striking front sleeve 5-1 is abutted against the back striking back sleeve 5-1, the inner wall of the front part of the machine body 7 is provided with a limiting boss 7-3, the limiting boss 7-3 is positioned behind the annular boss 1-1, the limiting boss is used for limiting the position of the drill rod tail 1, and when the drill rod tail 1 is excessively retreated, the front striking clearance is excessively small, the maximum impact force of the piston 2 cannot be exerted, in the embodiment, a buffer cushion block 8 is further arranged between the limiting boss and the annular boss 1-1, the buffer cushion block 8 is sleeved on the outer wall of the drill shank 1, the buffer cushion block 8 is arranged to be beneficial to protecting the limiting boss on the machine body 7, the damage to the machine body 7 caused by the direct collision of the annular boss 1-1 on the limiting boss is avoided, and the buffer cushion block 8 can be replaced after being damaged to be beneficial to prolonging the service life of the machine body 7;

the machine body 7 of the embodiment is provided with a longitudinal groove 7-1 and a long-strip hole 7-2 as a guide mechanism for guiding the pull rod mechanism to move back and forth, the longitudinal groove 7-1 is parallel to the axial direction of the piston 2, the embodiment is provided with two longitudinal grooves 7-1 which are respectively arranged on the outer walls of two opposite sides of the machine body 7, the connecting rod 5-2 is adaptively arranged in the longitudinal groove 7-1, the direction of the long-strip hole 7-2 is parallel to the axial direction of the piston 2 and is arranged at the rear end of the machine body 7, the back beating back cushion 5-3 is adaptively arranged in the long-strip hole 7-2, the back beating back cushion 5-3 and the connecting rod 5-2 respectively move back and forth under the constraint of the long-strip hole 7-2 and the longitudinal groove 7-1, therefore, the pull rod device 5 moves smoothly forwards and backwards, so that the faults are reduced, and the working reliability is improved;

the atomized water device comprises a water pipe joint 10 and a water jacket sleeve 9, the water jacket sleeve 9 is fixed on the inner wall of the machine body 7 and is sleeved with the outer wall of the drill rod shank 1, and the water jacket sleeve 9 is arranged between the buffer cushion block 8 and the limiting boss 7-3, so that the impact of the drill rod shank on the machine body is further buffered, and the service life of the machine body is prolonged. The water pipe joint 10 is connected with an opening on the side wall of the machine body 7, through holes are arranged on the side wall of the water jacket 9 and the side wall of the drill shank 1, the through hole on the side wall of the water jacket 9 is over against the opening on the side wall of the machine body 7, a water containing cavity 9-1 is arranged between the inner wall of the water jacket 9 and the outer wall of the drill shank 1, the through hole on the side wall of the water jacket 9 and the through hole on the side wall of the drill shank 1 are communicated with the water containing cavity 9-1, cooling water enters the water containing cavity 9-1 through the water pipe joint 10, when the drill shank 1 vibrates in the front and back direction, the through holes on the side wall of the drill shank 1 move in the water containing cavity 9-1 without departing from the range of the water containing cavity 9-1 in the axial direction, so that the water pipe at the center of the drill shank 1 can continuously supply cooling water, the cooling water is atomized at the tail end of the drill rod 4, and the drill shank 1 can be cooled;

the center of the piston 2 of the embodiment is provided with a longitudinal through hole for heat dissipation, so that the service life of the piston 2 is prolonged.

The hydraulic rock drill of this embodiment adopts piston 2 and bore bit shank 1 separation and combines draw bar device 5 to realize returning and beating the function, and this structure fault rate is low, reliable operation, and the volume is littleer, and piston 2 is bigger to bore bit shank 1's impact force, and bore bit shank 1 is shorter, and rotary drive transmission efficiency is high, and rotatory moment of torsion is powerful reliable, can also realize the empty function of beating back drill rod cover 3 under the spring 6 effect that resets, and work efficiency is high.

Claims (9)

1. A hydraulic rock drill with a back striking function comprises a drill bit shank and a piston arranged in an inner cavity of a machine body, wherein the front part of the drill bit shank extends out of a central hole of a front end cover of the machine body, the hydraulic rock drill is characterized by further comprising a pull rod device, the drill bit shank is arranged at the front part of the machine body, the piston is arranged at the rear part of the machine body, a front striking gap is formed between the front end surface of the piston and the rear end surface of the drill bit shank, an annular boss is arranged in the middle of the outer wall of the drill bit shank, a limiting boss is arranged on the inner wall of the front part of the machine body and is positioned behind the annular boss, the pull rod device comprises a back striking front sleeve, a back striking rear pad, a connecting rod and a reset spring, the connecting rod is parallel to the axial direction of the piston, the front end and the rear end of the connecting rod are fixedly connected with the back striking front sleeve and the back pad respectively, the back striking front sleeve is positioned in front of the annular boss and movably sleeved on the outer wall of the drill bit shank, the back striking back pad is arranged right behind the piston, a back clearance is formed between the rear end surface of the piston and the back striking back pad, the front end face of the reset spring is abutted against the front end cover of the machine body, the rear end face of the reset spring is abutted against the back beating front sleeve, and a guide mechanism for guiding the pull rod mechanism to move back and forth is further arranged on the machine body.

2. The hydraulic rock drill with the backhander function as claimed in claim 1, wherein a cushion block is further provided between the limit boss and the annular boss, and the cushion block is sleeved on the outer wall of the drill shank.

3. The hydraulic rock drill with the backhander function as claimed in claim 2, further comprising an atomized water device, wherein the atomized water device comprises a water pipe connector and a water jacket, the water jacket is fixed on the inner wall of the drill body and sleeved on the outer wall of the drill bit shank, the water pipe connector is connected with the opening on the side wall of the drill body, the side wall of the water jacket and the side wall of the drill bit shank are respectively provided with a through hole, the through hole on the side wall of the water jacket is opposite to the opening on the side wall of the drill body, a water containing cavity is arranged between the inner wall of the water jacket and the outer wall of the drill bit shank, and the through hole on the side wall of the water jacket and the through hole on the side wall of the drill bit shank are respectively communicated with the water containing cavity.

4. The hydraulic rock drill with the backhander function as recited in claim 3, wherein the water seal housing is disposed between the cushion block and the limit boss.

5. A hydraulic rock drill with a kickback function according to claim 1 wherein the guide means includes a longitudinal slot in the outer wall of the machine body, the slot being parallel to the axial direction of the piston, the connecting rod being fittingly received in the slot.

6. A hydraulic rock drill with a kickback function according to claim 1 wherein the guide mechanism includes an elongated hole disposed at the rear end of the machine body, the elongated hole being oriented parallel to the axial direction of the piston, the kickback pad being fittingly disposed within the elongated hole.

7. The hydraulic rock drill with the backhander function as recited in claim 1, wherein two connecting rods are provided and symmetrically provided on both sides of the machine body.

8. A hydraulic rock drill with a backstroke function as claimed in claim 1 wherein said piston is centrally provided with a heat dissipating longitudinal bore therethrough.

9. The hydraulic rock drill with the backhander function as claimed in claim 1, wherein the connecting rod is connected to the backhander front sleeve and the backhander rear pad through a screw mechanism.

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