CN211777188U - Large-torque drilling machine for coal mine - Google Patents
Large-torque drilling machine for coal mine Download PDFInfo
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- CN211777188U CN211777188U CN202020289228.8U CN202020289228U CN211777188U CN 211777188 U CN211777188 U CN 211777188U CN 202020289228 U CN202020289228 U CN 202020289228U CN 211777188 U CN211777188 U CN 211777188U
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Abstract
The utility model relates to a large-torque drilling machine for coal mines, which comprises a chassis, a large-disc swing mechanism, a drill stabilizing support assembly and a guide rail assembly, wherein a large rotary disc in the large-disc swing mechanism is rotatably arranged on the chassis, the guide rail assembly and the drill stabilizing support assembly are both arranged on the large rotary disc, and a low-speed large-torque motor for driving a drilling tool to rotate is arranged on the guide rail assembly; the drill stabilizing support assembly comprises a stand column assembly, a front support assembly and a rear support assembly, wherein the stand column assembly can provide various supports for the drilling machine; the guide rail assembly comprises a guide rail and a linear driving mechanism for realizing the forward and backward movement of the guide rail; the output shaft of the low-speed large-torque motor is connected with a drill rod in the drilling tool through a drill rod connecting assembly, and the drill rod connecting assembly is used for transmitting torque and push-pull force to the drill rod. The drilling machine can realize low-speed large-torque output and push-pull force transmission, and ensures stable operation of equipment through the drill stabilizing support assembly when a large pull-out force is generated during drilling and back expansion.
Description
Technical Field
The utility model belongs to colliery is drilling equipment field in the pit, concretely relates to big moment of torsion rig is used in colliery.
Background
The drilling machine is a common drilling device in a coal mine, the function of the drilling machine is different according to different construction requirements, the conventional drilling machine is generally a crawler-type drilling machine with a high-speed small-torque motor matched with a speed reducer to realize torque output, and the drilling machine has the characteristics of high-speed small torque and low-speed large torque and is suitable for drilling holes with common small apertures. If a large-torque or deep-hole drilling is realized, a special large-torque drilling tool is needed, particularly for a coal pillar area transverse drilling and back-expanding drilling machine, the conventional equipment cannot meet the large torque and the large pulling force required in back-expanding, and meanwhile, the equipment cannot be stably supported in back-expanding drilling.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the unable coal pillar district that realizes of conventional rig and transversely returning and expand drilling scheduling problem and utility model's transverse drilling, big moment of torsion rig for reaming, this rig can realize the transmission of low-speed big torque output and push-and-pull power to when drilling returns and expands and produces huge pulling force, guarantee the equipment through steady brill supporting component and stabilize the operation.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a large-torque drilling machine for a coal mine comprises a chassis, a large-plate rotating mechanism, a drill stabilizing support assembly and a guide rail assembly, wherein a rotating large plate in the large-plate rotating mechanism is rotatably arranged on the chassis, the guide rail assembly and the drill stabilizing support assembly are both arranged on the rotating large plate, and a low-speed large-torque motor for driving a drilling tool to rotate is mounted on the guide rail assembly; the drill stabilizing support assembly comprises a stand column assembly capable of providing upper support for the drilling machine, a front support assembly capable of providing front support for the drilling machine and a rear support assembly capable of providing rear support for the drilling machine; the guide rail assembly comprises a guide rail and a linear driving mechanism for realizing the forward and backward movement of the guide rail; the output shaft of the low-speed large-torque motor is connected with a drill rod in the drilling tool through a drill rod connecting assembly, and the drill rod connecting assembly is used for transmitting torque and push-pull force to the drill rod.
Be equipped with power adapter between the output shaft of drilling rod coupling assembling and the big torque motor of low-speed, power adapter includes fixed box, rotation axis and bearing, fixed box with the fuselage of the big torque motor of low-speed links firmly, the rotation axis passes through the bearing and rotates and install inside fixed box, the one end of rotation axis and the output shaft lug connection of the big torque motor of low-speed to the transmission moment of torsion, the other end of rotation axis passes through drilling rod coupling assembling and drilling rod connection.
The drill rod connecting assembly comprises a transmission and pulling disc, a connecting shaft and a pressing cover, wherein the transmission and pulling disc is sleeved on the rotating shaft and is fixedly connected with the rotating shaft; the pressing cover is sleeved on the connecting shaft and connected with the transmission and pulling disc, so that the connecting shaft is pressed on the end face of the rotating shaft; the connecting shaft is connected with the rotating shaft in a matched mode through a torque transmission structure, the drill rod is installed on the connecting shaft, and torque is transmitted from the rotating shaft to the drill rod through the torque transmission structure.
The end of the connecting shaft is provided with a radial boss, and the gland can be clamped on the radial boss.
The end face of the transmission pull disc is provided with threaded holes distributed in the circumferential direction, the end face of the gland is provided with round holes distributed in the circumferential direction, and the gland and the transmission pull disc are connected by penetrating the round holes through bolts to be connected with the threaded holes.
The following two ways can be adopted for positioning the connecting shaft: firstly, the rotating shaft and the connecting shaft are positioned through a spigot structure; and secondly, the rotating shaft is matched with the gland through the spigot structure to realize the positioning of the gland, and the gland is matched with the connecting shaft through the spigot structure to realize the positioning of the connecting shaft.
The stand subassembly is equipped with two sets ofly, and the stand subassembly includes outer cylinder and sets up the inside hydro-cylinder in outer cylinder, and inside hydro-cylinder promotes vertical support portion and stretches out and draw back from top to bottom to the realization is to the last support of rig.
An angle adjusting component is further arranged between the upright post component and the guide rail component to adjust the pitching angle of the guide rail.
The angle adjusting component comprises an angle adjusting power mechanism and an angle adjusting support, one end of the angle adjusting support is hinged to the upright post component, the other end of the angle adjusting support is connected with the angle adjusting power mechanism, the guide rail is installed on a rail surface of the angle adjusting support, the guide rail can move back and forth along the rail surface under the pushing of the linear driving mechanism, and the pitching angle adjustment of the guide rail is realized under the telescopic action of the angle adjusting power mechanism.
The chassis is a crawler belt disc and comprises a crawler traveling mechanism and a ground supporting oil cylinder, and a hydraulic oil tank, a power system and an operating mechanism are further arranged on the crawler belt chassis.
The utility model has the advantages of following innovation point: compared with the prior art, the utility model realizes the stable up-and-down support of the whole drilling machine equipment by the cooperation of the upper support of the upright post component and the ground supporting oil cylinder on the crawler chassis; the front and the rear supports of the guide rail can support the front and the rear of the guide rail when the guide rail is pulled up, so that the stability of the equipment during back-reaming drilling is ensured; the big torque motor of low-speed passes through drilling rod coupling assembling direct drive drilling tool rotatory, has guaranteed that equipment returns and has expanded the low-speed stability of drilling, improve equipment operating efficiency to drilling rod coupling assembling not only can realize the high-efficient transmission of moment of torsion, can also realize returning the transmission of the push-and-pull force of expanding the drilling in-process, guarantees to return and expands going on smoothly of drilling.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the middle drill stabilizing support assembly and the guide rail assembly of the present invention;
fig. 3 is a side view of the steady drill support assembly and the guide rail assembly of the present invention;
FIG. 4 is a schematic structural diagram of a drilling slewing device according to the present invention;
FIG. 5 is a schematic structural view of a fixed box of the power adapter of the present invention;
fig. 6 is a schematic structural view of the drill rod connection assembly of the present invention;
the labels in the figure are: 1. the drilling device comprises a crawler chassis, 2, a power system, 3, an operating mechanism, 4, a hydraulic oil tank, 5, a large-disc rotating mechanism, 501, a rotating large disc, 6, a drill stabilizing support assembly, 7, a guide rail assembly and 8, and a drilling rotating device;
601. the lifting device comprises a column assembly 601a, a vertical supporting part 601b, an outer column body 601c, a lifting oil cylinder 601d, a hoop 602, a front supporting assembly 603 and a rear supporting assembly;
701. the angle adjusting device comprises a guide rail, 702, an angle adjusting assembly, 702a, an angle adjusting bracket, 702b, an angle adjusting oil cylinder, 703 and a translation oil cylinder;
801. the high-torque motor comprises a low-speed high-torque motor 802, a power adapter 802a, a rotating shaft 802b, a bearing 802c, a sealing structure 802d, a fixed box body 802d-1, a medium inflow interface 802d-2, a medium outflow interface 803, a drill rod connecting assembly 803a, a transmission disc 803b, a connecting shaft 803b-1, a radial boss 803c and a gland.
Detailed Description
The following detailed description of the present invention is provided with reference to the accompanying drawings and examples, but not to be construed as limiting the present invention in any way.
Referring to the attached drawings, the large-torque drilling machine for the coal mine comprises a crawler chassis 1, a power system 2, an operating mechanism 3, a hydraulic oil tank 4, a large-disc slewing mechanism 5, a drill stabilizing support assembly 6 and a guide rail assembly 7.
The crawler chassis 1 comprises a crawler traveling mechanism and ground supporting oil cylinders, free movement of the equipment is realized through the crawler traveling mechanism, and meanwhile, the support function of the equipment is realized through the ground supporting oil cylinders arranged at four corners of the crawler chassis 1; the power system 2 is fixed on the crawler chassis 1 and comprises a motor and a hydraulic pump, the motor rotates to drive the hydraulic pump to rotate, so that the hydraulic pump can suck low-pressure oil from the hydraulic oil tank 4 and do work to output high-pressure oil; the operating mechanism 3 is used for reversing, regulating the flow, regulating the pressure and the like on high-pressure oil output by a hydraulic pump in the power system so as to enable the hydraulic oil to enter the executing mechanism and drive the executing mechanism to act, and the executing mechanism is each oil cylinder arranged on the equipment; the hydraulic oil tank 4 is fixed on the crawler chassis 1, provides low-pressure oil for a hydraulic pump of the power system 2, and simultaneously cools the hydraulic oil after acting by utilizing the stored hydraulic oil and the oil tank body.
The large-disc rotating mechanism 5 is fixed on the crawler chassis 1, so that the rotation of the large rotating disc 501 and other mechanisms on the large rotating disc 501 can be realized, and meanwhile, through the connection with the chassis, the upright post component 601 in the drill stabilizing support component 6 can directly apply force to the crawler chassis 1 when supporting upwards, so that the stability of equipment during construction is maintained.
Still be equipped with the crossbeam between the outer cylinder 601b of two column subassemblies 601, the crossbeam both ends are established on outer cylinder 601b through staple bolt 601d slip cap, and staple bolt 601d and lift cylinder 601 c's cylinder body fixed connection, lift cylinder 601 c's piston stretches out the back downwards, can realize the promotion to the crossbeam.
The guide rail assembly 7 comprises a guide rail 701, the guide rail 701 is installed on the cross beam through an angle adjusting assembly 702, the angle adjusting assembly 702 comprises an angle adjusting support 702a and an angle adjusting oil cylinder 702b, one end of the angle adjusting support 702a is hinged to the cross beam, the other end of the angle adjusting support 702a is rotatably connected with a piston of the angle adjusting oil cylinder 702b, the end of a cylinder body of the angle adjusting oil cylinder 702b is hinged to the rotary large disc 501, and under the telescopic action of the angle adjusting oil cylinder 702b, the pitch angle adjustment of the angle adjusting support 702a can be realized.
The guide rail 701 is slidably arranged on a slideway of the angle adjusting bracket 702a, the guide rail 701 moves back and forth on the slideway by the arranged translation oil cylinder 703, the cylinder body of the translation oil cylinder 703 is fixed on the angle adjusting bracket 702a, and the piston is fixedly connected with the guide rail 701. The guide rail 701 is provided with a drilling tool for drilling and a drilling slewer 8 for driving the drill rod to rotate, the angle adjusting component 702 adjusts the angle adjusting bracket 702a, the pitch angle of the guide rail 701 is adjusted, and the drilling direction of the drilling tool is further adjusted.
The drill stabilizing support assembly 6 further comprises a front support assembly 602 and a rear support assembly 603 which are arranged at the front end and the rear end of the guide rail 701, in the embodiment, the front support assembly 602 is fixed at the front end of the guide rail 701, when the guide rail 701 moves forwards, the front support plate in the front support assembly 602 is supported on a coal pillar in front, a telescopic oil cylinder is arranged in the rear support assembly 603, the telescopic oil cylinder is arranged between the upper plane and the lower plane of the guide rail 701, a piston of the telescopic oil cylinder is connected with the rear support plate, and the rear support plate extends backwards to be supported on a coal wall or a rock wall through the action of the telescopic oil cylinder; thus, the front and back support of the device can be achieved by the front support assembly 602 and the back support assembly 603.
In practice, the front support assembly 602 can also be controlled by the telescopic cylinder to move back and forth, and the rear support assembly 603 is fixed at the rear end of the guide rail.
Furthermore, all be equipped with a plurality of protrusions in the toper fixed head of face on preceding backup pad and the back backup pad, when supporting, can increase and the coal column, coal wall or the rock-wall between the frictional force, improve the stability of supporting.
The drilling slewing device 8 adopts a low-speed large-torque motor 801, a power adapter 802 and a drill rod connecting assembly 803, wherein the power adapter 802 is used for transmitting torque and push-pull force, the power adapter 802 comprises a fixed box body 802d, a rotating shaft 802a and a bearing 802b, the fixed box body 802d is fixedly connected with the body of the low-speed large-torque motor 801, the rotating shaft 802a is rotatably installed inside the fixed box body 802d through the bearing 802b, one end of the rotating shaft 802a is directly connected with the output shaft of the low-speed large-torque motor 801 through a spline or a flat key to transmit torque, and the other end of the rotating shaft 802a is connected with a drill rod through the drill rod connecting assembly 803 to transmit the torque and the push-pull force to the drill.
The bottom of the fixed box body 802d is connected with a propulsion oil cylinder on the guide rail 701, and the propulsion oil cylinder pushes the drilling slewing device 8 to move back and forth along the guide rail 701, so that drilling and back expansion of the drilling tool are realized.
In order to cool the bearing 802b, a cooling medium which flows circularly is inserted into the fixed box 802d, so that the fixed box 802d is provided with a medium inflow port 802d-1 and a medium outflow port 802d-2, respectively, and a sealing structure 802c is provided between the box covers at both ends of the fixed box 802d and the rotating shaft 802a to prevent the cooling medium from leaking.
The bearings 802b are tapered roller bearings and are arranged at two ends of the rotating shaft 802a in pairs, so that the rotating shaft 802a can rotate and can transmit axial push-pull force.
The drill rod connecting assembly 803 comprises a transmission and pulling disc 803a, a connecting shaft 803b and a gland 803c, wherein an external thread is processed at the end part of a rotating shaft 802a on the power adapter 802, an internal thread matched with the transmission and pulling disc 803a is processed on the transmission and pulling disc 803a, the transmission and pulling disc 803a is fixed at the outer side of the rotating shaft 802a through threaded connection, a plurality of threaded holes are formed in the end surface of the transmission and pulling disc 803a along the circumferential direction, and the connection and torque transmission are realized by the end part or the end surface of the rotating shaft 802a and one end of the connecting shaft 803b through a torque transmission structure; one end of the connecting shaft 803b is provided with a radial boss 803b-1, the end surface is matched with the rotating shaft 802a to transmit torque, and the other end of the connecting shaft 803b is connected with a drill rod; the gland 803c is a hollow revolving body, the center of the gland 803c is hollow, the gland can be sleeved on the connecting shaft 803b until the gland is clamped at the radial boss 803b-1 position of the connecting shaft 803b, a plurality of round holes are uniformly distributed on the end surface of the gland 803c along the circumference, the number of the round holes is consistent with the number of the threaded holes on the transmission and pulling disc 803a, then bolts penetrate through the round holes and are in threaded connection with the threaded holes of the transmission and pulling disc 803a, the connecting shaft 803b is pressed on the end surface of the rotating shaft 802a, and thus, the push-pull force of the rotating shaft 802a can be transmitted to the connecting shaft 803; the end of the rotating shaft 802a is provided with a male spigot, and the end of the corresponding connecting shaft 803b is provided with a female spigot matched with the male spigot, so that the connecting shaft 803b is positioned in a matching manner, and the connecting shaft 803b and the rotating shaft 802a are coaxial.
The torque transmission structure realizes torque transmission through convex-concave matching, for example, a spline and a key groove matching structure, wherein the spline is arranged on the rotating shaft 802a, the key groove is arranged on the connecting shaft 803b, or the spline is arranged on the connecting shaft 803b, and the key groove is arranged on the rotating shaft 802 a; or the torque transmission structure is a matching structure of a boss similar to a spline and a groove, or can be a cylindrical pin structure, pin holes for installing cylindrical pins are formed in the end face of the rotating shaft 802a and the end face of the connecting shaft 803b, and two ends of each cylindrical pin are respectively fixed in the pin holes in the end face of the rotating shaft 802a and the end face of the connecting shaft 803 b.
For the positioning of the connecting shaft 803b, the positioning can also be performed indirectly, that is, the positioning is realized through the gland 803c, specifically: the rotating shaft 802a and the gland 803c are matched through a spigot structure to realize the positioning of the gland 803c, and the gland 803c and the connecting shaft 803b are matched through a spigot structure to realize the positioning of the gland 803c on the connecting shaft 803b, so that the connecting shaft 803b and the rotating shaft 802a are ensured to be coaxial.
The drill rod and the connecting shaft 803b are installed in a form common in the art, namely, the end of the connecting shaft 803b is processed into a conical surface, so that the drill rod and the connecting shaft are fixedly installed.
In order to facilitate the detachment of the gland 803c, the gland 803c is further provided with a detachment hole, which may be a threaded hole, so that when the gland 803c is detached, a bolt may be screwed into the detachment hole and pushed against the pulling disk 803a, and the bolt is continuously tightened, so that the ejection detachment of the gland 803c can be realized.
During construction, the equipment is moved to a construction position through the crawler chassis 1, and the rotating large disc 501 is driven by the operating mechanism 3 to adjust the angle, so that the guide rail 701 faces the coal pillar for construction; the operating mechanism 3 controls a ground supporting oil cylinder on the crawler chassis 1 to support the ground, controls a vertical supporting part 601a of the upright post assembly 601 to extend upwards and supports the top of a coal wall, and completes the up-and-down support of the equipment; an angle adjusting oil cylinder 702b of the angle adjusting assembly 702 is driven by the operating mechanism 3 to adjust the inclination angle of the guide rail 701, so that the guide rail 701 reaches a construction angle; the operating mechanism 3 drives the translation oil cylinder 703 to enable the guide rail 701 to move forwards until a front support assembly 602 at the front end of the guide rail 701 can be supported on a coal pillar, and then the operating mechanism 3 drives a telescopic oil cylinder in the guide rail 701 to enable a rear support plate of a rear support assembly 603 to extend backwards and be supported on a coal wall, so that front and rear support of the guide rail 701 is realized; after the guide rail is supported, the drilling tool is driven to rotate by the drilling slewing device 8, and meanwhile, the drilling slewing device 8 is driven to advance along the guide rail by a propulsion oil cylinder in the guide rail 701, so that drilling of the drilling tool is realized; after the drilling of the equipment is completed through a drilling tool, a back-expansion drill bit is installed on the other side of the coal pillar, so that back expansion of the drill bit can be performed, and at the moment, a propelling oil cylinder in a guide rail 701 can be used for pulling up a drilling slewing device 8 to realize back expansion drilling of the equipment; the drilling rotary device 8 directly drives the drilling tool to rotate by using the low-speed large-torque motor 801 through the power adapter 802, so that the low-speed stability of the equipment during back-reaming drilling is ensured, and the operation efficiency of the equipment is improved.
Claims (10)
1. A large-torque drilling machine for coal mines comprises a chassis, a large-disc rotating mechanism (5), a drill stabilizing support assembly (6) and a guide rail assembly (7), wherein a large rotating disc (501) in the large-disc rotating mechanism (5) is rotatably arranged on the chassis, the drill stabilizing support assembly (6) and the guide rail assembly (7) are both arranged on the large rotating disc (501), and a low-speed large-torque motor (801) for driving a drilling tool to rotate is mounted on the guide rail assembly (7); the method is characterized in that: the drill stabilizing support assembly (6) comprises a stand column assembly (601) capable of providing upper support for the drilling machine, a front support assembly (602) capable of providing front support for the drilling machine and a rear support assembly (603) capable of providing rear support for the drilling machine; the guide rail assembly (7) comprises a guide rail (701) and a linear driving mechanism for realizing the forward and backward movement of the guide rail (701); the output shaft of the low-speed large-torque motor (801) is connected with a drill rod in the drilling tool through a drill rod connecting assembly (803), and the drill rod connecting assembly (803) is used for realizing the transmission of torque and push-pull force to the drill rod.
2. The high-torque drill for coal mines as set forth in claim 1, wherein: be equipped with power adapter (802) between the output shaft of drilling rod coupling assembling (803) and the big torque motor of low-speed (801), power adapter (802) are including fixed box (802 d), rotation axis (802 a) and bearing (802 b), fixed box (802 d) with the fuselage of the big torque motor of low-speed (801) links firmly, rotation axis (802 a) are installed inside fixed box (802 d) through bearing (802 b) rotation, the one end of rotation axis (802 a) and the output shaft of the big torque motor of low-speed (801) are connected with the transmission torque, and the other end of rotation axis (802 a) passes through drilling rod coupling assembling (803) and drilling rod connection.
3. The high-torque drill for coal mines as set forth in claim 2, wherein: the drill rod connecting assembly (803) comprises a transmission and pulling disc (803 a), a connecting shaft (803 b) and a gland (803 c), wherein the transmission and pulling disc (803 a) is sleeved on the rotating shaft and is fixedly connected with the rotating shaft (802 a); the gland (803 c) is sleeved on the connecting shaft (803 b) and connected with the transmission and pulling disc (803 a), so that the connecting shaft (803 b) is pressed on the end face of the rotating shaft (802 a); the connecting shaft (803 b) and the rotating shaft (802 a) are in fit connection through a torque transmission structure, the drill rod is mounted on the connecting shaft (803 b), and torque is transmitted from the rotating shaft (802 a) to the drill rod through the torque transmission structure.
4. The high-torque drill for coal mines as set forth in claim 3, wherein: the end of the connecting shaft (803 b) is provided with a radial boss (803 b-1), and the gland (803 c) can be clamped on the radial boss (803 b-1).
5. The high-torque drill for coal mines as set forth in claim 3, wherein: the end face of the transmission pull disc (803 a) is provided with circumferentially distributed threaded holes, the end face of the gland (803 c) is provided with circumferentially distributed round holes, and bolts penetrate through the round holes to be connected with the threaded holes, so that the connection between the gland (803 c) and the transmission pull disc (803 a) is realized.
6. The high-torque drill for coal mines as set forth in claim 3, wherein: the rotating shaft (802 a) and the connecting shaft (803 b) are positioned through a spigot structure; or the rotating shaft (802 a) and the gland (803 c) are matched through a spigot structure to realize the positioning of the gland (803 c), and the gland (803 c) and the connecting shaft (803 b) are matched through a spigot structure to realize the positioning of the connecting shaft (803 b).
7. The high-torque drill for coal mines as set forth in claim 1, wherein: the vertical column component (601) is provided with two groups, the vertical column component (601) comprises an outer column body (601 b) and an inner oil cylinder arranged in the outer column body (601 b), and the inner oil cylinder pushes a vertical supporting portion (601 a) to stretch up and down so as to realize the upper support of the drilling machine.
8. The high-torque drill for coal mines as set forth in claim 1, wherein: an angle adjusting component (702) is further arranged between the upright post component (601) and the guide rail component (7) so as to adjust the pitch angle of the guide rail (701).
9. The high torque drill for coal mines according to claim 8, wherein: the angle adjusting component (702) comprises an angle adjusting power mechanism and an angle adjusting support (702 a), one end of the angle adjusting support (702 a) is hinged to the upright post component (601), the other end of the angle adjusting support is connected with the angle adjusting power mechanism, the guide rail (701) is installed on a rail surface of the angle adjusting support (702 a), the guide rail (701) can move back and forth along the rail surface under the pushing of the linear driving mechanism, and the pitching angle adjustment of the guide rail (701) is realized under the telescopic action of the angle adjusting power mechanism.
10. The high-torque drill for coal mines as set forth in claim 1, wherein: the chassis is a crawler chassis (1) and comprises a crawler travelling mechanism and a ground supporting oil cylinder, and the crawler chassis (1) is further provided with a power system (2), an operating mechanism (3) and a hydraulic oil tank (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020289228.8U CN211777188U (en) | 2020-03-11 | 2020-03-11 | Large-torque drilling machine for coal mine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020289228.8U CN211777188U (en) | 2020-03-11 | 2020-03-11 | Large-torque drilling machine for coal mine |
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| CN211777188U true CN211777188U (en) | 2020-10-27 |
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| CN202020289228.8U Active CN211777188U (en) | 2020-03-11 | 2020-03-11 | Large-torque drilling machine for coal mine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790024A (en) * | 2021-08-27 | 2021-12-14 | 中国煤炭科工集团太原研究院有限公司 | Anchor drilling arm leveling device |
-
2020
- 2020-03-11 CN CN202020289228.8U patent/CN211777188U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790024A (en) * | 2021-08-27 | 2021-12-14 | 中国煤炭科工集团太原研究院有限公司 | Anchor drilling arm leveling device |
| CN113790024B (en) * | 2021-08-27 | 2023-08-25 | 中国煤炭科工集团太原研究院有限公司 | Anchor bores arm levelling device |
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Address after: 467400 Industrial Agglomeration Area of Baofeng County, Pingdingshan City, Henan Province Patentee after: Tiefulai Equipment Manufacturing Group Co.,Ltd. Address before: 467400 Industrial Agglomeration Area of Baofeng County, Pingdingshan City, Henan Province Patentee before: HENAN TIEFULAI EQUIPMENT MANUFACTURING Co.,Ltd. |