CN114263430A - Hydraulic rock drill with return beating function - Google Patents
Hydraulic rock drill with return beating function Download PDFInfo
- Publication number
- CN114263430A CN114263430A CN202210097712.4A CN202210097712A CN114263430A CN 114263430 A CN114263430 A CN 114263430A CN 202210097712 A CN202210097712 A CN 202210097712A CN 114263430 A CN114263430 A CN 114263430A
- Authority
- CN
- China
- Prior art keywords
- drill
- piston
- machine body
- sleeve
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The invention relates to a related device of a hydraulic rock drill, in particular to a hydraulic rock drill with a back striking function, which comprises a drill shank, a drill rod sleeve, 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 striking front sleeve, a back striking back pad, a connecting rod and a reset spring, the connecting rod is respectively and fixedly connected with the back striking front sleeve and the back striking 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 shank, the back striking back pad is arranged right behind the piston, the reset spring is sleeved on the outer wall of the drill shank, the front end surface of the reset spring is abutted against a front end cover of the machine body, the back end surface of the back striking front sleeve is abutted against the back sleeve, a guide mechanism for guiding the pull rod mechanism to move forwards and backwards is also arranged on the machine body, and forwards, and backwards, and forwards the hydraulic rock drill has strong rotating torque and reliably, Low failure rate, reliable operation, large impact force, small volume, good maintainability and the like.
Description
Technical Field
The invention 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 in 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 striking function is characterized in that a piston of the existing hydraulic rock drill with the back striking function 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 propulsion 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 striking of the drill shank, and therefore the drill rod is separated from constraint of a working medium 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 a high-temperature (such as a blast furnace taphole) high-pressure environment during drilling, high-impact and high-frequency vibration are generated, after a guide copper sleeve of the drill bit shank is abraded, deflection easily occurs in the motion of the drill bit shank, the piston is further damaged by pulling, impact is influenced, faults easily 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.
Disclosure of Invention
The invention 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 rod, a drill rod sleeve, a piston arranged in an inner cavity of a machine body, a pull rod device and a back striking mechanism, wherein the front end part of the drill rod sleeve is connected with the back end part of the drill rod, the back end part of the drill rod sleeve is rotatably sleeved with the front end part of the drill rod sleeve, the front part of the drill rod extends out of a center hole of a front end cover of the machine body, the drill rod is arranged at the front part of the machine body, the piston is arranged at the back part of the machine body, a front striking gap is arranged between the front end surface of the piston and the back end surface of the drill rod sleeve, an annular boss is arranged in the middle of the outer wall of the drill rod, 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 back cushion, a connecting rod and a reset spring, the connecting rod is axially parallel to the piston, the front end and the back striking back end of the connecting rod are respectively fixedly connected with the back striking front sleeve and the back striking back cushion, the annular boss is movably sleeved on the outer wall of the drill rod, the back beating pad is arranged right behind the piston, a back beating gap is arranged between the back end face of the piston and the back beating 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 back end face of the reset spring is abutted against the back beating front cover, 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 elongated hole is connected with the back cushion in a guiding way 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 driven forwards, the front end face of the piston impacts the rear end face of the drill bit shank to realize forward driving, when a drill rod is clamped by a working medium and the drill bit is clamped, the machine body is pulled backwards and moves forwards relative to the drill bit shank, the annular boss of the drill bit shank pushes the back driving front sleeve to move forwards, the front driving clearance is increased and is separated from the range of the piston stroke, meanwhile, the connecting rod drives the back driving back pad to move forwards synchronously, the back driving clearance is reduced, the back driving back pad enters the range of the piston stroke, the back end face of the piston repeatedly impacts the front end face of the back driving back pad, the back driving back pad retreats relative to the machine body, the connecting rod drives the back driving front sleeve to retreat, the back end face of the back driving front sleeve repeatedly impacts the front end face of the annular boss to retreat, and the drill bit shank with the drill bit shank retreats from the working medium.
The hydraulic rock drill of the invention 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 the hydraulic rock drill with a backhander function in the backhander operating 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 is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 striking function comprises a drill rod 1, a drill rod 4, a drill rod sleeve 3, a piston 2 arranged in an inner cavity of a machine body 7, a water atomizing device and a pull rod device 5, wherein the front end and the back end of the drill rod sleeve 3 are respectively rotatably sleeved with the back end of the drill rod 4 and the front end of the drill rod 1, the drill rod 1 is arranged at the front part of the machine body 7, the front part of the drill rod 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 striking gap is arranged between the front end surface of the piston 2 and the back end surface of the drill rod 1, an annular boss 1-1 is arranged in the middle part of the outer wall of the drill rod 1, the pull rod device 5 comprises a back striking front sleeve 5-1, a back striking back cushion 5-3, a connecting rod 5-2 and a reset spring 6, the connecting rod 5-2 is axially parallel to the piston 2, and the front end and the back end of the connecting rod are respectively connected with the back striking front sleeve 5-1, the back sleeve, The reverse striking back cushion 5-3 is connected with the screw thread, 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 arranged at two sides of the machine body 7, the reverse striking front sleeve 5-1 is arranged in front of the annular boss 1-1 and is movably sleeved on the outer wall of the drill rod tail 1, the reverse striking back cushion 5-3 is arranged right behind the piston 2, a reverse striking clearance is arranged between the back end surface of the piston 2 and the reverse striking back cushion 5-3, the 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 reverse striking front sleeve 5-1 is abutted against the back end surface, the inner wall of the front part of the machine body 7 is provided with a limit boss 7-3, the limit boss 7-3 is arranged behind the annular boss 1-1, the limit boss is used for limiting the position of the drill rod tail 1, when rock drilling, 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 with 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 rod, a drill rod sleeve, a piston arranged in an inner cavity of a machine body, wherein the front end part of the drill rod sleeve is connected with the back end part of the drill rod, the back end part of the drill rod sleeve is rotatably sleeved with the front end part of the drill rod sleeve, the front part of the drill rod extends out of a center hole of a front end cover of the machine body, the hydraulic rock drill is characterized by also comprising a pull rod device, the drill rod is arranged at the front part of the machine body, the piston is arranged at the back part of the machine body, a front striking gap is arranged between the front end surface of the piston and the back end surface of the drill rod sleeve, an annular boss is arranged in the middle of the outer wall of the drill rod, 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 back cushion, a connecting rod and a reset spring, the connecting rod is axially parallel to the piston, the front end and the back striking front sleeve are respectively fixedly connected with the back striking front sleeve and the back cushion, the back striking front sleeve is movably sleeved on the outer wall of the drill rod, the back beating pad is arranged right behind the piston, a back beating gap is arranged between the back end surface of the piston and the back beating pad, the front end surface of the reset spring is abutted against the front end cover of the machine body, the back end surface of the reset spring is abutted against the back beating front sleeve, and the machine body is further provided with a guide mechanism for guiding the pull rod mechanism to move back and forth.
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 kickback function as claimed in claim 1 wherein the 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210097712.4A CN114263430A (en) | 2022-01-27 | 2022-01-27 | Hydraulic rock drill with return beating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210097712.4A CN114263430A (en) | 2022-01-27 | 2022-01-27 | Hydraulic rock drill with return beating function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114263430A true CN114263430A (en) | 2022-04-01 |
Family
ID=80833357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210097712.4A Pending CN114263430A (en) | 2022-01-27 | 2022-01-27 | Hydraulic rock drill with return beating function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114263430A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116220540A (en) * | 2023-03-06 | 2023-06-06 | 徐州徐工基础工程机械有限公司 | Impact part and impact mechanism |
-
2022
- 2022-01-27 CN CN202210097712.4A patent/CN114263430A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116220540A (en) * | 2023-03-06 | 2023-06-06 | 徐州徐工基础工程机械有限公司 | Impact part and impact mechanism |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114263430A (en) | Hydraulic rock drill with return beating function | |
| US4209070A (en) | Air-operated self-propelling rotary-percussive downhole drill | |
| CN207892525U (en) | A kind of down-the-hole drill | |
| CN216922009U (en) | Hydraulic rock drill with return beating function | |
| CN114562197A (en) | Hydraulic rock drill with return beating function | |
| CN108798502A (en) | Screw composite impact device | |
| US4537265A (en) | Self propelled reversible boring ram | |
| US7419015B2 (en) | Rock drilling machine and axial bearing | |
| JP5813099B2 (en) | Jackhammer | |
| US4732219A (en) | Hammer drill with pneumatically driven percussion piston | |
| CN111112651A (en) | Spindle for rotary tool | |
| CN107524408A (en) | Rock drill | |
| CN217233405U (en) | Hydraulic rock drill with impact mechanism | |
| JPH0893376A (en) | Drilling machine | |
| CN213476022U (en) | Hydraulic rock drill with forward spring type drilling and automatic drill rod retreating function and reverse beating function | |
| KR101721893B1 (en) | Hydraulic rotary percussion apparatus for boring mine holes | |
| CN215859963U (en) | Impact cylinder sleeve for hydraulic rock drill | |
| CN215257124U (en) | Buffer mechanism for hydraulic rock drill | |
| CN220051715U (en) | Change cover shock-absorbing structure and electric tool | |
| CN112976011B (en) | Extension mechanism of service robot | |
| CN218624064U (en) | Pull rod device for hydraulic rock drill | |
| CN219622627U (en) | Buffering system of hydraulic rock drill without one-way valve | |
| CN213744257U (en) | Oil groove improving device of impactor piston | |
| CN219336965U (en) | Novel ball reverser | |
| CN201250607Y (en) | Structure capable of idle drilling and preventing idle striking for hydraulic rock drill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |