CN112049632A - Cutting drum mechanism for tunneling and anchoring machine - Google Patents
Cutting drum mechanism for tunneling and anchoring machine Download PDFInfo
- Publication number
- CN112049632A CN112049632A CN202010943430.2A CN202010943430A CN112049632A CN 112049632 A CN112049632 A CN 112049632A CN 202010943430 A CN202010943430 A CN 202010943430A CN 112049632 A CN112049632 A CN 112049632A
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- cutting
- oil cylinder
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- 238000005520 cutting process Methods 0.000 title claims abstract description 82
- 230000007246 mechanism Effects 0.000 title claims abstract description 27
- 238000004873 anchoring Methods 0.000 title claims abstract description 26
- 230000005641 tunneling Effects 0.000 title claims abstract description 15
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 230000036346 tooth eruption Effects 0.000 claims abstract description 11
- 230000000670 limiting effect Effects 0.000 claims abstract description 5
- 230000001050 lubricating effect Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 7
- 230000006378 damage Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 36
- 239000010687 lubricating oil Substances 0.000 description 6
- 239000011435 rock Substances 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 235000010585 Ammi visnaga Nutrition 0.000 description 1
- 244000153158 Ammi visnaga Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
- E21C25/10—Rods; Drums
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a cutting drum mechanism for a tunneling and anchoring machine, which comprises a left middle drum, a right middle drum, a left drum and a right drum, wherein the left middle drum, the right middle drum, the left drum and the right drum are fixedly arranged on a speed reducer support; the left roller and the right roller respectively comprise an outer side roller and an inner side roller which can axially slide in the outer side roller; the edge outer roller and the edge inner roller are provided with pin shafts for limiting the edge inner roller after the edge inner roller extends to the working size in the edge outer roller; the drum surfaces of the left middle drum, the right middle drum, the left drum and the right drum are provided with drum cutting teeth in a multi-helix symmetrical mode, and the end parts of the left drum and the right drum are respectively provided with side end cover cutting teeth and end disc cutting teeth in a multi-helix symmetrical mode. The cutting drum mechanism for the heading and anchoring machine provided by the invention can solve the problems that the coal wall is easy to fall off to generate potential safety hazards when the cutting drum of the current heading and anchoring machine cuts, the telescopic oil cylinder is easy to vibrate and damage, and the like.
Description
Technical Field
The invention relates to the technical field of excavating machinery, in particular to a cutting drum mechanism for a tunneling and anchoring machine.
Background
Current driving and bolting machine cutting drum comprises interior cutting drum, the outer cutting drum of cutting drum both sides including setting, and set up in the storage tank of outer cutting drum both sides and with outer cutting drum sliding connection's flexible cutting drum, the outside of interior cutting drum, outer cutting drum and flexible cutting drum all is equipped with the broken rock tooth of multiunit, and the tooth point orientation that broken rock tooth is spiral distribution and broken rock tooth is the same with the direction of rotation of interior cutting drum. When the tunneling and anchoring machine works, the cutting drum cuts the roadway, the section of the roadway is rectangular, the corners of the section are right-angled, stress concentration is caused, the coal wall is easy to fall off, and potential safety hazards exist. Moreover, when the telescopic cutting drums on the two sides of the outer cutting drum are used for cutting, the stress is large, the vibration is severe, and the telescopic oil cylinders connected between the outer cutting drum and the telescopic cutting drums are easily damaged due to the vibration. Moreover, the telescopic oil cylinder and the mounting seat mounted on the outer cutting drum accommodating groove are of an integrated structure, so that when the easily damaged telescopic oil cylinder is frequently replaced, the telescopic oil cylinder and the mounting seat are required to be integrally disassembled and replaced, time and labor are wasted, and resources are wasted. Simultaneously, the fitting surface between the flexible cutting drum with outer cutting drum sliding connection is no lubricating structure, and frictional force is great between outer cutting drum and the flexible cutting drum, and the slip stroke of flexible cutting drum in outer cutting drum is longer more receives frictional resistance bigger, consequently, after tunneling and bolting machine cutting drum work for a certain time, wearing and tearing are serious between outer cutting drum and the flexible cutting drum, and after the fit clearance between the two increases, the vibration increase produces the destruction to the drum.
Disclosure of Invention
The invention aims to solve the technical problems that the cutting drum mechanism for the heading and anchoring machine is used for solving the potential safety hazard caused by the fact that the cross section of a roadway cut by the cutting drum of the existing heading and anchoring machine is rectangular, stress is concentrated, coal walls are easy to fall off, the drum is stressed greatly and vibrates greatly when cutting is carried out, and a telescopic oil cylinder is easy to vibrate and damage.
In order to solve the technical problem, the invention provides a cutting drum mechanism for a tunneling and anchoring machine, which comprises
The left middle roller and the right middle roller are fixedly arranged on the inner side of the speed reducer support, and the left roller and the right roller are symmetrically arranged on two sides of the speed reducer support;
the left roller and the right roller respectively comprise an outer side roller and an inner side roller which can axially slide in the outer side roller;
the edge outer roller and the edge inner roller are provided with pin shafts for limiting the edge inner roller after the edge inner roller extends to the working size in the edge outer roller;
the drum surface of the left middle drum and the right middle drum is provided with drum cutting teeth in a multi-helix symmetrical mode, the drum surface of the outer drum is provided with drum cutting teeth in a multi-helix symmetrical mode, the side part and the end face of one end of the inner drum far away from the outer drum are respectively provided with a side end cover cutting tooth and an end disc cutting tooth, and the side end cover cutting tooth and the end disc cutting tooth are both arranged in a multi-helix symmetrical mode.
Furthermore, the inner wall of the edge outer roller is provided with a radial lubricating groove, the outer wall of the edge inner roller is provided with an axial lubricating groove which is in cross contact with the radial lubricating groove, and the edge outer roller is provided with an oil filling hole communicated with the radial lubricating groove.
Furthermore, spline seats are fixedly arranged in the outer side roller close to one end of the left middle roller and one end of the right middle roller, one side of each spline seat close to the inner side roller is fixedly connected with an adjusting block, a telescopic oil cylinder is detachably fixed on the adjusting blocks through an oil cylinder seat, and the output end of the telescopic oil cylinder is fixedly connected with the inner side roller.
Furthermore, the oil cylinder seat is of a two-half-circle structure, the inner diameter of the two-half-circle structure is matched with the outer diameter of the telescopic oil cylinder, the two-half-circle structure is in butt joint with the telescopic oil cylinder and is connected together through a nut, a gasket and a bolt, the two-half-circle structure is axially fixed on the adjusting block through a bolt hole in the circumference through the bolt, and the telescopic oil cylinder is fixedly connected with the adjusting block together.
Furthermore, a key is fixedly arranged on the inner wall of the edge outer roller, a key groove corresponding to the key position and matched with the key position is arranged on the edge inner roller, the edge inner roller is arranged in the edge outer roller through the key and the key groove, and the edge inner roller can axially slide along the key under the action of the telescopic oil cylinder.
Further, the key is fixed on the inner wall of the edge outer drum through a screw arranged on the outer wall of the edge outer drum.
Furthermore, the other side of the spline seat is fixedly connected to the end face of the side of the speed reducer, spline shafts matched with the spline seat are respectively arranged on two sides of the speed reducer, and the spline shafts are arranged in the spline seat to fixedly connect the speed reducer with the left roller and the right roller.
Further, a material guide plate is arranged on the left rotary drum or the right rotary drum.
Furthermore, two inner sides of the speed reducer support are matched with the left middle roller and the right middle roller through seam allowances respectively and are fixedly connected with the left middle roller and the right middle roller through bolts respectively.
The invention provides a cutting drum mechanism for a tunneling and anchoring machine, which is characterized in that drum cutting teeth are symmetrically arranged on the drum surfaces of a left middle drum and a right middle drum and the drum surfaces of outer drums on the sides of a left drum and a right drum in a multi-helix manner, and side end cover cutting teeth and end disc cutting teeth which are symmetrically arranged in the multi-helix manner are respectively arranged on the side parts and the end surfaces of the outer ends of inner drums on the sides of the left drum and the right drum. In addition, according to the cutting drum mechanism for the tunneling and anchoring machine, after the side inner drums of the left side drum and the right side drum extend to the preset working size in the side outer drum, the side inner drums are limited by the pin shafts arranged on the side outer drums, and the stability of the side inner drums in the side outer drums is enhanced, so that the problems that the stress is large, the vibration is large, and the telescopic oil cylinder is damaged due to the vibration easily when the side inner drums in the side outer drums extend to perform cutting work are avoided.
Drawings
Figure 1 is a schematic structural view of a cutting drum mechanism for an anchor driving machine according to an embodiment of the present invention;
FIG. 2 is a schematic view of the construction of the left and right rollers of the cutting roller mechanism for the excavator according to the embodiment of the present invention;
FIG. 3 is a cross-sectional view of the left and right rollers of the cutting roller mechanism for the machine according to the present invention;
FIG. 4 is a left side view of the left and right rollers of the cutting roller mechanism for the machine according to the present invention;
FIG. 5 is a schematic diagram of the structure of the inside rollers of the left and right rollers of the cutting roller mechanism for the excavator according to the embodiment of the present invention;
fig. 6 is a schematic view illustrating a spline seat and a speed reducer bracket of the cutting drum mechanism for the driving and anchoring machine according to the embodiment of the present invention;
fig. 7 is a schematic structural view of a speed reducer bracket and a spline shaft of the cutting drum mechanism for the driving and anchoring machine according to the embodiment of the invention.
Detailed Description
Referring to fig. 1, the cutting drum mechanism for the excavator and anchor machine provided by the embodiment of the invention comprises a left drum 1, a left middle drum 2, a right middle drum 3 and a right drum 4, wherein the left middle drum 2 and the right middle drum 3 are drums with the same structure, the left middle drum 2 and the right middle drum 3 are fixedly arranged at the inner side of a speed reducer support 18 in a centrosymmetric manner, the left drum 1 and the right drum 4 are drums with the same structure, and the left drum 1 and the right drum 4 are fixedly arranged at two sides of the speed reducer support 18 in a symmetric manner by taking the left middle drum 2 and the right middle drum 3 as centers. And the central axes of the left roller 1, the left middle roller 2, the right middle roller 3 and the right roller 4 are arranged on the same straight line, so that the left roller 1, the left middle roller 2, the right middle roller 3 and the right roller 4 can keep uniform and standard rotation circumferential ratios in the rotary tunneling process, the tunneling effect of the invention is optimized, and the tunneling efficiency of the invention in the tunneling process is improved.
Referring to fig. 2 and 3, the left and right rollers 1 and 4 include an outer edge roller 7 and an inner edge roller 13 axially slidable within the outer edge roller 7. The edge outer roller 7 and the edge inner roller 13 are provided with pin shafts 11, after the edge inner roller 13 extends to a preset working size in the edge outer roller 7, the edge inner roller 13 is limited on the edge outer roller 7 through the pin shafts 11, and meanwhile, the pin shafts 11 are fixed by clamp springs 12. The side inner drum 13 is limited by the pin shaft 11, the stability of connection between the side inner drum 13 and the side outer drum 7 can be enhanced, so that the phenomenon that the side inner drum 13 in the side outer drum 7 is stressed greatly when cutting is carried out after stretching out can be avoided, vibration is large, and the telescopic oil cylinder 9 connected between the side outer drum 7 and the side inner drum 13 in diameter is damaged due to vibration.
As a specific embodiment of the invention, a spline seat 20 is fixedly arranged inside one end of the edge outer roller 7 close to the left middle roller 2 and the right middle roller 3, an adjusting block 8 is fixedly connected to one side of the spline seat 20 close to the edge inner roller 13, a telescopic oil cylinder 9 is detachably fixed on the adjusting block 8 through an oil cylinder seat 17, and the output end of the telescopic oil cylinder 9 is fixedly connected with the edge inner roller 13.
Referring to fig. 4, as an embodiment of the present invention, the cylinder base 17 is formed of two semicircular structures 171 and 172 having an inner diameter matched with an outer diameter of the telescopic cylinder 9, the two semicircular structures 171 and 172 are butted against the telescopic cylinder 9 and coupled together by a nut 14, a washer 15 and a bolt 16, and the two semicircular structures 171 and 172 are axially fixed to the adjusting block 8 by a bolt 173 through bolt holes on the circumference thereof, thereby fixedly coupling the telescopic cylinder 9 and the adjusting block 8 together. When the telescopic oil cylinder 9 is damaged and needs to be replaced, the oil cylinder seat 17 can be detached from the telescopic oil cylinder 9 only by detaching the bolt 173 and then detaching the nut 14 and the washer 15 on the bolt 16, and then the damaged telescopic oil cylinder 9 can be replaced by detaching the connection between the telescopic oil cylinder 9 and the edge inner roller 13. The telescopic oil cylinder 9 is simple and convenient to replace, and time and labor are saved.
As an embodiment of the present invention, a plurality of keys 10 are fixedly provided on the inner wall of the edge outside drum 7 in the axial direction, and the plurality of keys 10 are uniformly distributed on the inner wall of the edge outside drum 7, and as an embodiment of the present invention, the keys 10 are fixed on the inner wall of the edge outside drum 7 by screws 5 provided on the outer wall of the edge outside drum 7. Of course, as another embodiment of the present invention, the key 10 may be directly welded to the inner wall of the outer cylinder 7.
Referring to fig. 5, the inner side roller 13 is provided with a key groove 131 corresponding to the position of the key 10, and the key groove 131 is sized to match the key 10, and the inner side roller 13 is disposed in the outer side roller 7 through the key 10 and the key groove 131. When the telescopic cylinder 9 is telescopic, the edge inner roller 13 can slide axially in the edge outer roller 7 under the matching action of the key 10 and the key slot 131. Meanwhile, the inner edge roller 13 can be prevented from rotating radially relative to the outer edge roller 7 when the roller works by means of the radial limiting effect of the key 10 in the key slot 131.
As a specific embodiment of the invention, the inner wall of the side outer roller 7 is provided with a radial lubricating groove along the circumferential direction, the outer wall of the side inner roller is provided with an axial lubricating groove along the axial direction, and the radial lubricating groove and the axial lubricating groove are in cross contact. And the edge outer roller 7 is also provided with an oil filling hole communicated with the radial lubricating groove, lubricating oil can be injected into the radial lubricating groove through the oil filling hole, the lubricating oil entering the radial lubricating groove can flow into the axial lubricating groove which is in cross contact with the radial lubricating groove, and the matching surface of the edge outer roller 7 and the edge inner roller can be permeated with the lubricating oil. Therefore, the sufficient lubricity between the matching surfaces of the edge outer roller 7 and the edge inner roller can be ensured, and the friction force between the edge inner roller 13 and the edge outer roller 7 when the edge inner roller axially slides in the edge outer roller 7 can be greatly reduced, so that the abrasion between the edge outer roller 7 and the edge inner roller 13 when the cutting roller of the tunneling and anchoring machine works is reduced. After lubricating oil is injected from the oil filling hole, in order to prevent the lubricating oil from overflowing outwards, the screw 5 is screwed on the oil filling hole to seal the oil filling hole.
Wherein, the drum cutting picks 22 are arranged on the drum surfaces of the left middle drum 2 and the right middle drum 3 in a multi-helix symmetrical mode, the drum cutting picks 19 are arranged on the drum surfaces of the edge outer drums 7 of the left drum 1 and the right drum 4 in a multi-helix symmetrical mode, meanwhile, the side end cover cutting picks 132 and the end disc cutting picks 133 are respectively arranged on the side part and the end surface of the end of the edge inner drum 13 of the left drum 1 and the right drum 4 far away from the edge outer drum 7, and the side end cover cutting picks 132 and the end disc cutting picks 133 are also arranged in a multi-helix symmetrical mode. When the cutting drum for the heading and anchoring machine works, the track diameter of the cutting pick tooth point at the outer end part of the drum is gradually reduced, and corners are in circular arc transition, so that the cutting pick cutting track of the whole cutting drum presents the cylindrical shape at the middle part, and the two sides are in the conical shape, thereby effectively solving the problems that the section shape of a cutting tunnel of the drum is rectangular, the corners are in right angle, stress concentration is caused, the coal wall is easy to fall off, and the potential safety hazard exists.
As an embodiment of the present invention, referring to fig. 6 and 7, the other side of the spline housing 20 is fixedly connected to the side end face of the speed reducer support 18 by an axial positioning bolt 23, and spline shafts 21 matched with the spline housing 20 are respectively provided on both sides of the speed reducer support 18, and the spline shafts 21 are provided in the spline housing 20 to fixedly connect the speed reducer support 18 with the left and right drums 1 and 4.
As a specific embodiment of the invention, two inner sides of the speed reducer bracket 18 are respectively matched with the left middle roller 2 and the right middle roller 3 through rabbets and fixedly connected through bolts.
In an embodiment of the present invention, a material guide plate 6 is disposed on the left or right drum 1 or 4. The material guide plate 6 can prevent coal from splashing to two sides, so that the coal can fall down on the shovel plate.
According to the cutting drum mechanism for the heading and anchoring machine, the cutting teeth on the drum are reasonably arranged, so that a cutting roadway is formed into a rectangle with corners in arc transition, and a coal wall is more stable and safe. And because the inner wall of the outer side roller of the left and right side rollers and the outer wall of the inner side roller are respectively provided with the radial lubrication groove and the axial lubrication groove, the matching surfaces of the outer side roller and the inner side roller can be fully lubricated by injecting lubricating oil, so that the telescopic resistance of the telescopic oil cylinder is small, the stress is uniform, and the matching size between the rollers can be effectively protected. And after the edge inner roller extends to the preset working width, the edge inner roller is fixed in the edge outer roller by adopting the pin shaft and the clamp spring 8, so that the stability of the edge inner roller in the edge outer roller is enhanced, the whole roller is uniformly stressed, the vibration can be reduced during the cutting work, and the telescopic oil cylinder is prevented from being easily damaged due to the vibration. Meanwhile, the telescopic oil cylinder connected between the edge outer roller and the edge inner roller and the oil cylinder seat for fixing the telescopic oil cylinder are disassembled and assembled in a split mode, a balance valve and a base of the telescopic oil cylinder are avoided, time and labor are saved in installation and disassembly, and working efficiency is high.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (9)
1. A cutting drum mechanism for a tunneling and anchoring machine is characterized by comprising
The left middle roller and the right middle roller are fixedly arranged on the inner side of the speed reducer support, and the left roller and the right roller are symmetrically arranged on two sides of the speed reducer support;
the left roller and the right roller respectively comprise an outer side roller and an inner side roller which can axially slide in the outer side roller;
the edge outer roller and the edge inner roller are provided with pin shafts for limiting the edge inner roller after the edge inner roller extends to the working size in the edge outer roller;
the drum surface of the left middle drum and the right middle drum is provided with drum cutting teeth in a multi-helix symmetrical mode, the drum surface of the outer drum is provided with drum cutting teeth in a multi-helix symmetrical mode, the side part and the end face of one end of the inner drum far away from the outer drum are respectively provided with a side end cover cutting tooth and an end disc cutting tooth, and the side end cover cutting tooth and the end disc cutting tooth are both arranged in a multi-helix symmetrical mode.
2. The cutting drum mechanism for a heading and anchoring machine of claim 1, wherein: the inner wall of the edge outer roller is provided with a radial lubricating groove, the outer wall of the edge inner roller is provided with an axial lubricating groove which is in cross contact with the radial lubricating groove, and the edge outer roller is provided with an oil filling hole communicated with the radial lubricating groove.
3. The cutting drum mechanism for a heading and anchoring machine of claim 2, wherein: the inner part of one end of the edge outer roller, which is close to the left middle roller and the right middle roller, is fixedly provided with a spline seat, one side of the spline seat, which is close to the edge inner roller, is fixedly connected with an adjusting block, a telescopic oil cylinder is detachably fixed on the adjusting block through an oil cylinder seat, and the output end of the telescopic oil cylinder is fixedly connected with the edge inner roller.
4. A cutting drum mechanism for a heading and anchoring machine according to claim 3 wherein: the oil cylinder seat is of a two-half-circle structure, the inner diameter of the two-half-circle structure is matched with the outer diameter of the telescopic oil cylinder, the two-half-circle structure is in butt joint with the telescopic oil cylinder and is connected with the telescopic oil cylinder through a nut, a gasket and a bolt, the two-half-circle structure is axially fixed on the adjusting block through a bolt hole in the circumference through the bolt, and the telescopic oil cylinder is fixedly connected with the adjusting block.
5. A cutting drum mechanism for a heading and anchoring machine according to claim 3 wherein: the inner wall of the edge outer roller is fixedly provided with a key, the edge inner roller is provided with a key groove corresponding to and matched with the key position, the edge inner roller is arranged in the edge outer roller through the key and the key groove, and the edge inner roller can axially slide along the key under the action of the telescopic oil cylinder.
6. The cutting drum mechanism for a heading and anchoring machine of claim 5, wherein: the keys are fixed on the inner wall of the edge outer roller through screws arranged on the outer wall of the edge outer roller.
7. A cutting drum mechanism for a heading and anchoring machine according to claim 3 wherein: the other side of the spline seat is fixedly connected to the side end face of the speed reducer, spline shafts matched with the spline seat are arranged on two sides of the speed reducer respectively, and the spline shafts are arranged in the spline seat to fixedly connect the speed reducer with the left roller and the right roller.
8. The cutting drum mechanism for a heading and anchoring machine of claim 6, wherein: and a material guide plate is arranged on the left rotary drum or the right rotary drum.
9. The cutting drum mechanism for a heading and anchoring machine of claim 1, wherein: the two inner sides of the speed reducer support are matched with the left middle roller and the right middle roller through rabbets respectively and are fixedly connected through bolts respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010943430.2A CN112049632A (en) | 2020-09-09 | 2020-09-09 | Cutting drum mechanism for tunneling and anchoring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010943430.2A CN112049632A (en) | 2020-09-09 | 2020-09-09 | Cutting drum mechanism for tunneling and anchoring machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112049632A true CN112049632A (en) | 2020-12-08 |
Family
ID=73610419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010943430.2A Pending CN112049632A (en) | 2020-09-09 | 2020-09-09 | Cutting drum mechanism for tunneling and anchoring machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112049632A (en) |
-
2020
- 2020-09-09 CN CN202010943430.2A patent/CN112049632A/en active Pending
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