CN220351203U - Novel colliery winding machine - Google Patents
Novel colliery winding machine Download PDFInfo
- Publication number
- CN220351203U CN220351203U CN202321253282.7U CN202321253282U CN220351203U CN 220351203 U CN220351203 U CN 220351203U CN 202321253282 U CN202321253282 U CN 202321253282U CN 220351203 U CN220351203 U CN 220351203U
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- ratchet
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- pawl
- fixed
- carrier roller
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- 238000004804 winding Methods 0.000 title claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 95
- 239000003245 coal Substances 0.000 claims abstract description 16
- 238000009434 installation Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model provides a novel coal mine belt winder which comprises a chassis, a belt winding mechanism, a deviation preventing mechanism, a belt reversing mechanism, supporting columns, a hydraulic lifting mechanism, a hydraulic motor mounting seat, a ratchet mechanism, a hydraulic lifting mechanism, a motor protection cover and a ratchet protection cover, wherein the deviation preventing mechanism is symmetrically arranged at two ends of a front end connecting beam of the chassis, the belt reversing mechanism is arranged at the top of a rear end connecting beam of the chassis, the hydraulic lifting mechanism is symmetrically arranged at the tops of connecting beams at two sides of the chassis, the supporting columns are connected with the tops of the hydraulic lifting mechanism, the motor protection cover is connected with the tops of the supporting columns at one side of the connecting beam at the left end of the chassis, and the ratchet protection cover is connected with the tops of the supporting columns at one side of the connecting beam at the right end of the chassis. The novel belt winder provided by the utility model can be disassembled and conveniently transported to a working site of the coal mine belt winder, the ratchet mechanism is added to effectively prevent the inversion of the belt winding mechanism, and the novel belt winder can be suitable for winding belts with various specifications when the installation positions of the reversing mechanism and the anti-deviation mechanism are adjusted.
Description
Technical field:
the utility model relates to the technical field of coal mine equipment, in particular to a novel coal mine belt winder.
The background technology is as follows:
the coal mine belt winder is a mechanical device for winding the belt of the belt conveyor onto a roller. Traditional colliery winding machine is too big, the transport difficulty, and the commonality is poor and can't dismantle. To the above situation, it is necessary to design a detachable coal mine belt winder with a belt winding function, which is suitable for belts of various specifications.
The utility model comprises the following steps:
the utility model aims to solve the defects in the background technology and provides a novel coal mine tape winder.
The utility model provides a novel colliery winder, includes chassis, winding mechanism, anti-deviation mechanism, belt reversing mechanism, support post, hydraulic lifting mechanism, hydraulic motor mount pad, ratchet, hydraulic lifting mechanism, motor safety cover and ratchet safety cover, anti-deviation mechanism symmetry installs the both ends at chassis front end tie-beam, reversing mechanism installs the top at chassis rear end tie-beam, hydraulic lifting mechanism symmetry installs the top at chassis both sides tie-beam, the support post is connected with hydraulic lifting mechanism's top, the motor safety cover is connected with base left end tie-beam one side support post top, the ratchet safety cover is connected with the support post top of chassis right-hand member tie-beam one side, the hydraulic motor mount pad is fixed inside the motor safety cover, hydraulic motor is fixed on the hydraulic motor mount pad, winding mechanism one end is connected with hydraulic motor, and the other end is connected with ratchet, ratchet installs in the inside one side of keeping away from second slide bearing of keeping away from in the ratchet safety cover.
The winding mechanism comprises a first sliding bearing seat, a second sliding bearing seat, a power shaft, a first fixed disc, a second fixed disc, a square roller and a rotating shaft. The utility model discloses a motor safety cover, including motor safety cover, first sliding bearing seat, second sliding bearing seat, power shaft, spline, square cylinder, first sliding bearing seat, second sliding bearing seat, first sliding bearing seat is fixed on the inside cushion of motor safety cover, the power shaft runs through first sliding bearing seat, and one end is connected with hydraulic motor through the spline, and the other end is connected with first fixed disk through the cylindric lock, square cylinder one end is connected with first fixed disk, and the other end is connected with the second fixed disk, the second sliding bearing seat is fixed on the inside cushion of ratchet safety cover, the pivot runs through second sliding bearing seat and is connected with the second fixed disk, second sliding bearing seat's bottom and second sliding bearing seat's bottom are at same level.
Further, the connection mode of the square roller and the fixed disc is as follows: the square roller is placed in a U-shaped rib plate welded by three rectangular rib plates on the fixed disc, two cylindrical pins penetrate through the square roller and the rib plate, a third cylindrical pin penetrates through a reserved hole on the rib plate, and the cylindrical pins are tightly attached to the square roller.
The anti-deviation mechanism comprises a first carrier roller, a second carrier roller and a carrier roller fixing frame, wherein the first carrier roller is vertically fixed on one side of the carrier roller fixing frame by using a cotter pin, the second carrier roller is vertically fixed on the other side of the carrier roller fixing frame by using a cotter pin, the carrier roller fixing frame is fixed on a connecting beam at the front end of a chassis by using a bolt, and the first carrier roller and the second carrier roller are arranged at the same horizontal height.
Further, bolts penetrate through other holes reserved at the two ends of the connection between the carrier roller fixing frame and the front end of the chassis, and the position of the deviation preventing mechanism can be adjusted.
The reversing mechanism comprises a first mounting seat, a third sliding bearing seat, a reversing shaft, a second mounting seat, a fourth sliding bearing seat, a first limiting chuck and a second limiting chuck. The first mounting seat and the second mounting seat are fixed on two sides of a connecting beam at the rear end of the chassis, the third sliding bearing seat and the fourth sliding bearing seat are fixed on the upper parts of the first mounting seat and the second mounting seat respectively through bolts, the reversing shaft is connected with the sliding bearing seats at the two ends, and a cylindrical pin penetrates through a reserved hole of the reversing shaft and the limiting chuck to fix the rotating shaft and the limiting chuck.
Further, other holes reserved at the two ends of the limiting chuck and the reversing shaft are penetrated through by the cylindrical pin, so that the position of the limiting chuck on the reversing shaft can be changed.
The hydraulic lifting mechanism comprises a first hydraulic cylinder, a second hydraulic cylinder and a hydraulic cylinder protection device, wherein the first hydraulic cylinder and the second hydraulic cylinder are arranged on two sides of the bottom of a supporting upright post, and the hydraulic cylinder protection device is arranged in the middle of the bottom of the supporting upright post.
The ratchet mechanism comprises a ratchet wheel, a first pawl, a second pawl, a first spring, a second spring and a pawl mounting plate. The ratchet is connected with a rotating shaft on the tape winding mechanism through a key, the pawl mounting plate is fixed on one side of the ratchet through a bolt, the first pawl and the second pawl are mounted on two sides of the pawl mounting plate, the first pawl and the second pawl are matched with the ratchet, one end of the first spring is connected with the pawl mounting plate, the other end of the first spring is connected with the first pawl, one end of the second spring is connected with the pawl mounting plate, and the other end of the second spring is connected with the second pawl.
The beneficial effects are that:
the utility model uses the hydraulic motor as a power source, and can be used in places with coal dust and gas in coal mines. When the device is put into use, the device can be disassembled into a plurality of parts, so that the problem that the device cannot be transported to the working site of the coal mine tape winder due to oversized size is avoided.
The utility model adopts a central winding mode, and can realize stable winding and mass winding of the belt. The anti-deviation mechanism and the reversing mechanism are arranged on two sides of the belt winding mechanism, when the belt passes through the reversing mechanism, the hydraulic cylinder in the hydraulic lifting mechanism is started, and as the height of the belt winding mechanism is increased, the wrap angle of the belt on the reversing shaft is increased, so that the transmission of enough force is ensured, the winding of the belt is effectively completed, and meanwhile, the interference of the belt winding mechanism to other mechanisms of the belt conveyor can be avoided.
According to the utility model, the winding of belts with different specifications can be realized by changing the installation position of the deviation preventing mechanism on the connecting beam at the front end of the chassis and the installation position of the limiting chuck on the reversing shaft in the reversing mechanism.
The anti-deviation mechanism adopts the double carrier rollers, and can quickly restore the deviation belt to the original position relative to the single carrier roller mechanism.
Compared with a single-pawl ratchet mechanism, the double-pawl ratchet mechanism can effectively prevent the reverse rotation of the tape winding mechanism, and ensures the safety of the device.
Description of the drawings:
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a front view of the overall structure of the present utility model;
FIG. 3 is a left side view of the overall structure of the present utility model;
FIG. 4 is a schematic view of a tape winding mechanism according to the present utility model;
FIG. 5 is a schematic diagram of a reversing mechanism according to the present utility model;
FIG. 6 is a schematic view of a ratchet mechanism according to the present utility model;
in the figure, a chassis 1, a chassis front end connecting beam 11, a chassis rear end connecting beam 12, a chassis left end connecting beam 13, a chassis right end connecting beam 14, a chassis middle end connecting beam 15, a hanging lug 16, a winding mechanism 2, a power shaft 21, a first sliding bearing seat 22, a second sliding bearing seat 23, a first fixed disk 24, a second fixed disk 25, a square roller 26, a rotating shaft 27, an anti-deviation mechanism 3, a first carrier roller 31, a carrier roller fixing frame 32, a second carrier roller 33, a reversing mechanism 4, a first mounting seat 41, a second mounting seat 42, a third sliding bearing seat 43, a fourth sliding bearing seat 44, a reversing shaft 45, a first limiting chuck 46, a second limiting chuck 47, a supporting column 5, a hydraulic lifting mechanism 6, a first hydraulic cylinder 61, a second hydraulic cylinder 62, a hydraulic cylinder protecting device 63, a hydraulic motor 7, a hydraulic motor mounting seat 71, a ratchet mechanism 8, a ratchet 81, a pawl mounting plate 82, a first pawl 83, a second pawl 84, a first spring 85, a second spring 86, a motor protecting cover 9, and a ratchet protecting cover 10.
The specific embodiment is as follows:
the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 6, a novel coal mine tape winder in this embodiment includes: chassis 1, winding mechanism 2, anti-deviation mechanism 3, reversing mechanism 4, support column 5, hydraulic lifting mechanism 6, hydraulic motor 7, hydraulic motor mount 71, ratchet mechanism 8, motor protection cover 9 and ratchet protection cover 10;
the chassis 1 in this embodiment is formed by welding a chassis front end connecting beam 11, a chassis rear end connecting beam 12, a chassis left end connecting beam 13 and a chassis right end connecting beam 14 to each other into a rectangle, and in order to increase the stability of the chassis, the chassis 1 further includes a chassis middle end connecting beam 15, and two ends of the chassis middle end connecting beam 15 are respectively connected to the inner middle parts of the chassis left end connecting beam 13 and the chassis right end connecting beam 14. The two ends of the outer side of the connecting beam 11 at the front end of the chassis are provided with a plurality of holes, and the position of the anti-deviation mechanism 3 can be adjusted through bolts. The two ends of the connecting beam 13 at the left end of the chassis and the connecting beam 14 at the right end of the chassis are respectively welded with hanging lugs 16.
The hydraulic lifting mechanism 6 in this embodiment is symmetrically installed in the middle of the top ends of the chassis left end connecting beam 13 and the chassis right end connecting beam 14, the supporting upright 5 is connected with the top end of the hydraulic lifting mechanism 6, the hydraulic lifting mechanism 6 comprises a first hydraulic cylinder 61, a second hydraulic cylinder 62 and a hydraulic cylinder protection device 63, the first hydraulic cylinder 61 and the second hydraulic cylinder 62 are installed on two sides of the bottom of the supporting upright 5, the hydraulic cylinder protection device 63 is installed in the middle of the bottom of the supporting upright 5, when the hydraulic lifting mechanism 6 is started, the first hydraulic cylinder 61 and the second hydraulic cylinder 62 can slowly push the supporting upright 5 to rise, the hydraulic cylinder protection device 63 can also stretch, when the rolling is completed, the hydraulic lifting mechanism 6 can slowly descend to the original position, the hydraulic cylinder protection device 63 can play a supporting role, and the hydraulic cylinders are prevented from being crushed.
The anti-deviation mechanism 3 of this example is installed in the both sides of chassis front end tie-beam 11, anti-deviation mechanism 3 includes first bearing roller 31, bearing roller mount 32 and second bearing roller 33, first bearing roller 31 uses the cotter pin to vertically fix in one side of bearing roller mount 32, the second bearing roller 33 uses the cotter pin to vertically fix in the opposite side of bearing roller mount 32, first bearing roller 31 and second bearing roller 33 are installed at same level, bearing roller mount 32 passes through the bolt fastening on chassis front end tie-beam 11, the belt takes place the off tracking when rolling, first bearing roller 31 and second bearing roller 33 can resume normal position with the off tracking belt rapidly through the friction with the belt, when adjusting bearing roller mount 32 in chassis front end tie-beam 11's off tracking of different specification belt installation position.
The reversing mechanism 4 in this example is connected to the chassis rear end connection beam 12, and includes: the first installation seat 41, the second installation seat 42, the third sliding bearing seat 43, the fourth sliding bearing seat 44, the reversing shaft 45, the first limiting chuck 46 and the second limiting chuck 47, the first installation seat 41 and the second installation seat 42 are respectively fixed on two sides of the chassis rear end connecting beam 12, the third sliding bearing seat 43 and the fourth sliding bearing seat 44 are mounted on the tops of the first installation seat 41 and the second installation seat 42 through bolts, one end of the reversing shaft 45 is connected with the third sliding bearing seat 43, the other end of the reversing shaft 45 is connected with the fourth sliding bearing seat 44, the first limiting chuck 46 and the second limiting chuck 47 are fixed on two sides of the reversing shaft 45 through cylindrical pins, a belt passes through the reversing shaft 45, the winding direction of the belt can be changed, and when the mounting positions of the first limiting chuck 46 and the second limiting chuck 47 and the reversing shaft 45 are adjusted, the belt reversing device can be suitable for reversing belts with different specifications.
In this example, the motor protection cover 9 is connected to the top of the support column 5 on the side of the chassis left end connection beam 13, and the ratchet protection cover 10 is connected to the top of the support column 5 on the side of the chassis right end connection beam, so as to increase stability. Reinforcing ribs are arranged around the connection part of the motor protection cover 9 and the supporting upright post 5, and the connection part of the ratchet wheel protection cover 10 and the supporting upright post 5 is also provided with reinforcing ribs. The hydraulic motor mount 71 is mounted inside the motor protector 9, and the hydraulic motor 7 is fixed to the hydraulic motor mount 71.
In this example, the winding mechanism 2 has one end connected to the hydraulic motor 7 and the other end connected to the ratchet mechanism 8, and includes: a power shaft 21, a first sliding bearing seat 22, a second sliding bearing seat 23, a first fixed disk 24, a second fixed disk 25, a square roller 26 and a rotating shaft 27. The first sliding bearing seat 22 is fixed on a cushion block in the motor protection cover 9, the second sliding bearing seat 23 is fixed on a cushion block in the ratchet wheel protection cover 10, in order to reduce the volume, the power shaft 21 directly penetrates through the first sliding bearing seat 22, one end of the power shaft is connected with the hydraulic motor 7 through a spline, the other end of the power shaft is connected with the first fixed disk 24 through a cylindrical pin, one end of the square roller 26 is connected with the first fixed disk 24, the other end of the square roller is connected with the second fixed disk 25, the rotating shaft 27 directly penetrates through the second sliding bearing seat 23 and is connected with the second fixed disk 25, the square roller 26 and the fixed disk are connected in a mode that the square roller 26 is placed in a U-shaped rib plate formed by welding three rectangular rib plates on the fixed disk, two cylindrical pins penetrate through the square roller 26 and the rib plate, a third cylindrical pin penetrates through a hole reserved in the rib plate, and the cylindrical pin is tightly attached to the square roller 26. When the hydraulic motor 7 is started, the power shaft 21 transmits torque to drive the winding mechanism 2 to rotate slowly, the square roller 36 starts winding the belt, and when the winding of the belt is completed, the connection between the square roller 26 and the first fixed disc 24 and the connection between the square roller 26 and the second fixed disc 25 are released, and the square roller 36 is taken down by a machine.
The ratchet mechanism 8 in this example is mounted inside a ratchet boot, the ratchet mechanism comprising: the ratchet 81, pawl mounting plate 82, first pawl 83, second pawl 84, first spring 85 and second spring 86, ratchet 81 passes through the key and is connected with pivot 27, and pawl mounting plate 82 is fixed in one side of ratchet 81, and first pawl 83 and second pawl 84 are fixed in pawl mounting plate 82 both sides, and first pawl 83 and second pawl 84 mutually support with ratchet 81, and first spring 85 one end is fixed on pawl mounting plate 82, and the other end is connected with first pawl 83, and second spring 86 one end is fixed on pawl mounting plate 82, and the other end is connected with second pawl 84. Because the first pawl 83 and the second pawl 84 are self-gravity, the first spring 85 and the second spring 86 are kept in a stretched state, when the winding mechanism is operating normally, the first pawl 83 and the second pawl 84 are kept in an original state, and when the machine is turned upside down, the first pawl 83 and the second pawl 84 are abutted against the ratchet 81, preventing the machine from turning upside down.
The working principle of the novel tape winder is as follows: when the hydraulic motor 7 is started, the power shaft 21 transmits torque to drive the belt winding mechanism 2 to slowly rotate, the belt firstly passes through the deviation preventing structure 3 and then passes through the reversing mechanism 4, the belt moving direction is changed, the square roller 26 starts to wind the belt, the hydraulic lifting mechanism 6 is started, the hydraulic cylinder slowly pushes the belt winding mechanism 2 to lift to a proper position, when the belt is wound, the deviation of the belt occurs, the first carrier roller 31 and the second carrier roller 33 can quickly restore the deviation belt to the original position through friction with the belt, when the belt winding mechanism 2 is reversely rotated, the ratchet mechanism 8 plays a role, the first pawl 83 and the second pawl 84 can prop against the ratchet 81 to prevent the belt winding mechanism 2 from continuously reversing, when the belt is wound, the connection between the square roller 26 and the first fixed disc 24 and the second fixed disc 25 can be released, the square roller 26 is taken down by using a machine, and a new square roller is replaced. When the installation position of the anti-deviation mechanism 3 on the connecting beam 11 at the front end of the chassis is adjusted, the installation positions of the first limiting chuck 46 and the second limiting chuck 47 on the reversing shaft 45 in the reversing mechanism 4 are adjusted, so that the rolling of belts with different specifications can be realized.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the spirit and principles of the present utility model.
Claims (6)
1. A novel coal mine winder, comprising: chassis (1), winding mechanism (2), prevent off tracking mechanism (3), reversing mechanism (4), support post (5), hydraulic lifting mechanism (6), hydraulic motor (7), hydraulic motor mount pad (71), ratchet (8), motor safety cover (9) and ratchet safety cover (10), its characterized in that: the utility model discloses a motor protection cover, including chassis front end tie-beam (11), steering mechanism (4), hydraulic motor (7) are installed at the top of chassis rear end tie-beam (12), hydraulic lifting mechanism (6) symmetry is installed at the top of chassis both sides tie-beam, support post (5) are connected with the top of hydraulic lifting mechanism (6), motor protection cover (9) are connected with the support post (5) top that is close to base left end tie-beam (12) one side, ratchet protection cover (10) are connected with the support post (5) top that is close to chassis right-hand member tie-beam (13) one side, hydraulic motor mount pad (71) are fixed inside motor protection cover (9), hydraulic motor (7) are fixed on hydraulic motor mount pad (71), tape winding mechanism (2) one end is connected with hydraulic motor (7), and the other end is connected with ratchet (8), ratchet (8) are installed in ratchet protection cover (10) inside one side of keeping away from second slip bearing frame (23).
2. A novel coal mine winder as claimed in claim 1, wherein: the tape winding mechanism (2) comprises: the power shaft (21), first slide bearing seat (22), second slide bearing seat (23), first fixed disk (24), second fixed disk (25), square cylinder (26) and pivot (27), first slide bearing seat (22) is fixed on the inside cushion of motor safety cover (9), second slide bearing seat (23) is fixed on the inside cushion of ratchet safety cover (10), power shaft (21) directly runs through first slide bearing seat (22), one end is connected with hydraulic motor (7), the other end is connected with first fixed disk (24) through the cylindric lock, square cylinder (26) one end is connected with first fixed disk (24), the other end is connected with second fixed disk (25), pivot (27) directly run through second slide bearing seat (23) and second fixed disk (25) are connected.
3. A novel coal mine winder as claimed in claim 1, wherein: the anti-deviation mechanism (3) comprises a first carrier roller (31), a carrier roller fixing frame (32) and a second carrier roller (33), wherein the first carrier roller (31) is vertically fixed on one side of the carrier roller fixing frame (32) through a cotter pin, the second carrier roller (33) is vertically fixed on the other side of the carrier roller fixing frame (32) through a cotter pin, the first carrier roller (31) and the second carrier roller (33) are mounted at the same horizontal height, and the carrier roller fixing frame (32) is fixed on a chassis front end connecting beam (11) through bolts.
4. A novel coal mine winder as claimed in claim 1, wherein: the ratchet mechanism (8) comprises: ratchet (81), pawl mounting panel (82), first pawl (83), second pawl (84), first spring (85) and second spring (86), ratchet (81) are connected with pivot (27), pawl mounting panel (82) are fixed in one side of ratchet (81), first pawl (83) with second pawl (84) rotate and install in pawl mounting panel (82) both sides, first pawl (83) and second pawl (84) mutually support with ratchet (81), first spring (85) one end is fixed on pawl mounting panel (82), and the other end is connected with first pawl (83), second spring (86) one end is fixed on pawl mounting panel (82), and the other end is connected with second pawl (84).
5. A novel coal mine winder as claimed in claim 1, wherein: a plurality of equidistant holes are formed in two sides of the outer part of the connecting beam (11) at the front end of the chassis.
6. A novel coal mine winder as claimed in claim 1, wherein: and a plurality of equidistant holes are formed at the two ends of the rotating shaft (27) in the anti-deviation mechanism (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321253282.7U CN220351203U (en) | 2023-05-19 | 2023-05-19 | Novel colliery winding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321253282.7U CN220351203U (en) | 2023-05-19 | 2023-05-19 | Novel colliery winding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220351203U true CN220351203U (en) | 2024-01-16 |
Family
ID=89476171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321253282.7U Active CN220351203U (en) | 2023-05-19 | 2023-05-19 | Novel colliery winding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220351203U (en) |
-
2023
- 2023-05-19 CN CN202321253282.7U patent/CN220351203U/en active Active
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