CN112072850A - Rocker arm applying permanent magnet motor - Google Patents
Rocker arm applying permanent magnet motor Download PDFInfo
- Publication number
- CN112072850A CN112072850A CN202011048852.XA CN202011048852A CN112072850A CN 112072850 A CN112072850 A CN 112072850A CN 202011048852 A CN202011048852 A CN 202011048852A CN 112072850 A CN112072850 A CN 112072850A
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- Prior art keywords
- permanent magnet
- magnet motor
- rocker arm
- rotor
- cutting
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C31/00—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam
- E21C31/02—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam for cutting or breaking-down devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a rocker arm applying a permanent magnet motor, which relates to the technical field of rocker arms of coal mining machines and adopts the technical scheme that the rocker arm comprises a rocker arm body; the cutting part is arranged at one end of the rocker arm body; the connecting part is arranged at one end of the rocker arm body, which is far away from the cutting part, the cutting part and the connecting part are positioned at two opposite sides of the rocker arm body, and the connecting part is used for being connected with a coal mining machine; the cutting drum is sleeved outside the cutting part and is rotationally connected with the cutting part; and the permanent magnet motor is arranged in the cutting part, the rotor of the permanent magnet motor directly drives the cutting drum to rotate, the permanent magnet motor can directly output low rotating speed, the rotor of the permanent magnet motor directly drives the cutting drum, a gear reduction structure is not arranged, the production cost is reduced, and the gear reduction structure is not arranged, so that the maintenance frequency and the maintenance difficulty are reduced, and the maintenance cost is reduced.
Description
Technical Field
The invention relates to the technical field of coal mining machine rocker arms, in particular to a rocker arm applying a permanent magnet motor.
Background
The rocker arm is an important composition structure in the coal mining machine, a cutting drum is arranged on the rocker arm, and coal mining operation is carried out through the cutting drum; in the coal mining process, the cutting drum needs low rotating speed and high torque, so that a three-phase asynchronous motor is mostly adopted in the conventional rocker arm to transmit power to the cutting drum.
Because the rotating speed of three-phase asynchronous motor output is high, in order to satisfy the requirement of the cutting drum to low rotating speed, a plurality of groups of speed reduction devices need to be arranged in the middle of the rocker arm, and the speed reduction is realized by adopting a mode of multi-stage gear reduction and planetary gear reduction to provide the rotating speed satisfying the requirement for the cutting drum. But the multi-stage reduction gear and the planet gear have high cost, and often have faults in the using process, and are complex to overhaul and high in overhaul cost.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the rocker arm applying the permanent magnet motor, the permanent magnet motor can directly output low rotating speed, the rotor of the permanent magnet motor directly drives the cutting drum, a gear reduction structure is not arranged, the production cost is reduced, the gear reduction structure is not arranged, the maintenance frequency and the maintenance difficulty are reduced, and the maintenance cost is reduced.
In order to achieve the purpose, the invention provides the following technical scheme: a rocker arm applying a permanent magnet motor comprises a rocker arm body;
the cutting part is arranged at one end of the rocker arm body;
the connecting part is arranged at one end of the rocker arm body, which is far away from the cutting part, the cutting part and the connecting part are positioned at two opposite sides of the rocker arm body, and the connecting part is used for being connected with a coal mining machine;
the cutting drum is sleeved outside the cutting part and is rotationally connected with the cutting part;
and the permanent magnet motor is arranged in the cutting part, and a rotor of the permanent magnet motor directly drives the cutting drum to rotate.
By adopting the technical scheme, the rotating speed of the permanent magnet motor is low, the cutting drum is directly driven to rotate by the permanent magnet motor, and the requirement of the cutting drum on the rotating speed can be met without arranging a gear reduction structure; a gear reduction structure is not arranged, so that the cost of the gear reduction structure is saved, and the overall production cost of the rocker arm is greatly reduced; in the use, because of not setting up gear reduction structure, so be difficult to break down, reduced maintenance frequency, after breaking down, direct dismantlement down permanent-magnet motor maintain can, simplified maintenance operation, reduced cost of maintenance.
The invention is further configured to: the permanent magnet motor is a permanent magnet motor of TBVF-480-60 type or TBVF-750-96 type of Nanyang explosion-proof motor GmbH.
By adopting the technical scheme, the cutting drum has the requirement of 60-96 pole pairs for a motor directly driving the cutting drum to rotate, and the pole pairs of permanent magnet motors of the Nanyang explosion-proof motor company of the limited company TBVF-480-60 type or TBVF-750-96 type meet the requirement.
The invention is further configured to: a chuck is fixed on a rotor of the permanent magnet motor, a connecting ring is sleeved on the outer side of the chuck and fixed on the cutting drum, and the chuck drives the connecting ring to rotate.
The invention is further configured to: the cross-section of the chuck is in a polygonal arrangement, and the inner side of the connecting ring is attached to the outer side of the chuck.
Through adopting above-mentioned technical scheme, the chuck that the polygon set up, the drive go-between that can be more stable rotates.
The invention is further configured to: the outer side of the permanent magnet motor rotor is sleeved with a driving disc fixed on the rotor, and the chuck is fixed on the driving disc.
The invention is further configured to: the driving disc and the rotor are connected together in a key connection mode.
The invention is further configured to: and a cooling water channel is formed in one side of the rocker arm body, which is far away from the cutting part, penetrates through the rocker arm and the rotor, and cooling water for cooling the permanent magnet motor rotor flows through the cooling water channel.
Through adopting above-mentioned technical scheme, through the cooling water in the cooling water course, can cool off permanent-magnet machine's rotor.
The invention is further configured to: the end part of the permanent magnet motor rotor is provided with a water distribution pressure plate, and the water distribution pressure plate receives cooling water flowing out of the rotor and sprays the cooling water onto the inner wall of the cutting drum.
By adopting the technical scheme, the cooling water passing through the cooling water channel is sprayed on the inner wall of the cutting drum under the action of the water distribution pressure plate to cool the cutting drum.
The invention is further configured to: one side of the water distribution pressure plate, which is close to the rotor, is provided with water inlet holes communicated with the cooling water channel, and a plurality of dispersion holes which penetrate through the water distribution pressure plate outwards are formed in the outer side of each water inlet hole.
The invention is further configured to: the cutting part is arranged on the rocker arm body, the rocker arm body is fixedly connected with a water distribution disc on one side of the rocker arm body, the water distribution disc is used for supplying water to a cooling water channel, and a joint connected.
In summary, compared with the prior art, the invention has the following beneficial effects: the rotating speed of the permanent magnet motor is low, the cutting drum is directly driven to rotate by the permanent magnet motor, and the requirement of the cutting drum on the rotating speed can be met without arranging a gear reduction structure; a gear reduction structure is not arranged, so that the cost of the gear reduction structure is saved, and the overall production cost of the rocker arm is greatly reduced; in the use, because of not setting up gear reduction structure, so be difficult to break down, reduced maintenance frequency, after breaking down, direct dismantlement down permanent-magnet motor maintain can, simplified maintenance operation, reduced cost of maintenance.
Drawings
FIG. 1 is a sectional view of the overall structure of the embodiment;
FIG. 2 is a cross-sectional view of the cutting portion of the embodiment;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic diagram of an embodiment embodying a chuck shape;
figure 5 is a cross-sectional view of an embodiment embodying a water knock out tray.
In the figure: 1. a rocker arm body; 11. a communicating cavity; 2. a cutting part; 21. an accommodating chamber; 3. a connecting portion; 31. an electrically controlled cavity; 4. a permanent magnet motor; 41. a rotor; 411. fixing grooves; 5. a cutting drum; 51. a connecting ring; 6. a drive disc; 61. a chuck; 7. a water diversion pressure plate; 71. a water inlet hole; 72. a dispersion hole; 73. a fixed block; 8. a cooling water channel; 9. a water diversion disc; 91. a communicating hole; 92. and (4) a joint.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustrating the present invention and not for limiting the present invention.
The invention is further described with reference to the drawings and the preferred embodiments.
Example (b): a rocker arm applying a permanent magnet motor is shown in the attached figure 1 and comprises a rocker arm body 1, a cutting part 2 arranged at one end of the rocker arm body 1, a connecting part 3 arranged at one end of the rocker arm body 1, which is far away from the cutting part 2, a cutting drum 5 sleeved outside the cutting part 2 and a permanent magnet motor 4 arranged in the cutting part 2. The connecting part 3 and the cutting part 2 are positioned on two opposite sides of the rocker arm body 1, and the connecting part 3 is used for being connected with a coal mining machine body. The permanent magnet motor 4 directly drives the cutting drum 5 to rotate.
The rotating speed of the permanent magnet motor 4 is lower than that of the three-phase asynchronous motor; in coal mining machines, the output rotation speed of the cutting drum 5 of the rocker arm needs to be between 31RPM and 50RPM according to the operational formula of the rotation speed and the pole pair number of the motor: n ═ 60 x f)/p. In the formula, n is the output rotating speed of the motor, f is the frequency, p is the number of pole pairs, and when the output rotating speed of the motor is equal to the rotating speed of the cutting drum 5, the range of the number of pole pairs of the motor is 60-96. Therefore, the permanent magnet motor 4 with the pole pair number within the range of 60-96 is selected to drive the cutting drum 5 to directly rotate.
Preferably, the pole pair number of the permanent magnet motor 4 of the Nanyang explosion-proof motor company Limited in TBVF-480-60 model and the TBVF-750-96 model is before 60-96, so that the requirement of the pole pair number is met, and in the embodiment, the permanent magnet motor 4 of the Nanyang explosion-proof motor company Limited in TBVF-480-60 model or TBVF-750-96 model is selected to drive the cutting drum 5 to rotate.
Preferably, in this embodiment, the connection portion 3 is provided with an electric control cavity 31, and electric control elements such as a frequency converter, a rectification unit, a cable lead-in device, a filter unit, an inverter unit, and a reactor, which directly control the permanent magnet motor 4, are disposed in the electric control cavity 31. And an independent electric control cabinet is not required to be arranged on each coal mining machine to accommodate the electric control elements.
In this embodiment, an accommodating cavity 21 for accommodating the permanent magnet motor 4 is formed at one end of the cutting part 2, which is away from the rocker arm body 1; permanent magnet motor 4 is installed in holding the chamber 21 in the middle of, and permanent magnet motor 4's pivot stretches out from holding the chamber 21 in the middle of holding chamber 21 from the one end that holds chamber 21 and deviate from rocker arm body 1.
The communication cavity 11 for communicating the electric control cavity 31 with the accommodating cavity 21 is formed in the rocker arm body 1, an electric control element in the electric control cavity 31 is connected with the permanent magnet motor 4 through an electric wire, and the electric wire penetrates through the communication cavity 11 of the rocker arm body 1. In the conventional rocker arm, the portion of the communication chamber 11 sets the position of the reduction gear, and also the high-speed gear region, in order to be able to better accommodate the high-speed gear. The side wall of the communication chamber 11 in this embodiment is thicker than that of the high velocity region of the conventional rocker arm, so that the strength at the rocker arm body 1 is increased.
Referring to fig. 2 and fig. 3, a driving plate 6 is sleeved outside a rotor 41 of the permanent magnet motor 4, and the driving plate 6 is fixed on the rotor 41 of the permanent magnet motor 4.
In some embodiments, the rotor 41 of the permanent magnet motor 4 and the drive plate 6 are fixedly connected together by bolts.
In this embodiment, the driving disc 6 is a circular disc, the driving disc 6 is coaxially disposed with the rotor 41 of the permanent magnet motor 4, the cutting drum 5 is also coaxially disposed with the rotor 41 of the permanent magnet motor 4, and the rotor 41 of the permanent magnet motor 4 drives the cutting drum 5 to rotate through the driving disc 6.
Preferably, in this embodiment, a chuck 61 is fixedly connected to the driving disc 6, and the chuck 61 is located at one end of the rotor 41 of the permanent magnet motor 4, which is away from the rocker arm; the outer side of the chuck 61 is sleeved with a connecting ring 51, and the connecting ring 51 is fixedly connected on the inner wall of the cutting drum 5. The rotor 41 drives the chuck 61 to rotate through the driving disk 6, and the chuck 61 can drive the connecting ring 51 to rotate together during the rotation process, so as to drive the cutting drum 5 to rotate.
Referring to fig. 4, in order to ensure that the chuck 61 can stably drive the connection ring 51 to rotate together, a cross section of the chuck 61 along a direction perpendicular to an axis of the rotor 41 is polygonal, an inner side wall of the connection ring 51 is attached to an outer side wall of the chuck 61, and the chuck 61 not only pushes the connection ring 51 to rotate by a frictional force between the connection ring 51 and the chuck 61, but also pushes the connection ring 51 to rotate by a thrust of a sharp angle portion during the process of driving the connection ring 51 to rotate. So that the chuck 61 can stably drive the connecting ring 51 to rotate in the process of rotating; preferably, in the present embodiment, the chuck 61 is disposed in a quadrangular shape in a cross section perpendicular to the axial direction of the rotor 41.
In this embodiment, one side of the connection ring 51 close to the rocker arm body 1 and one side of the driving disc 6 departing from the rocker arm body 1 are attached to each other.
Referring to fig. 5, in this embodiment, a cooling water channel 8 is provided on one side of the rocker arm body 1 departing from the cutting portion 2, the cooling water channel 8 penetrates through the rocker arm body 1 and the rotor 41 of the permanent magnet motor 4, cooling water is introduced into the cooling water channel 8, the rotor 41 of the permanent magnet motor 4 is cooled by the cooling water, and damage to the rotor 41 of the permanent magnet motor 4 due to high temperature during the operation process is prevented. Preferably, in the present embodiment, the cooling water passage 8 is disposed coaxially with the rotor 41.
In this embodiment, one side of the rocker arm body 1 departing from the cutting part 2 is fixedly connected with a water distribution disc 9, the water distribution disc 9 is used for supplying water to the cooling water channel 8, a connector 92 used for being connected with a water pipe is fixedly connected to the water distribution disc 9, and a communication hole 91 for communicating the connector 92 with the cooling water channel 8 is formed in the water distribution disc 9.
In this embodiment, one side fixedly connected with partial pressure disk 7 that chuck 61 deviates from rocking arm body 1, cooling water channel 8 lets in the middle of partial pressure disk 7 behind the chuck 61, then sprays water to the inner wall of cutting drum 5 through partial pressure disk 7, cools off cutting drum 5. Preferably, in the embodiment, the side of the chuck 61 departing from the rocker arm body 1 and the side of the connecting ring 51 departing from the rocker arm body 1 are flush with each other, so that water spilling from the water distribution pressure plate 7 can be prevented from being blocked by the connecting ring 51.
In this embodiment, a water inlet 71 communicated with the cooling water channel 8 is formed in one side of the water diversion pressure plate 7 close to the rotor 41, a plurality of dispersing holes 72 penetrating through the water diversion pressure plate 7 outwards are formed in the outer side of the water inlet 71, the dispersing holes 72 are communicated with the water inlet 71, and water in the cooling water channel 8 is sprayed outwards through the dispersing holes 72 after entering the water inlet 71. Preferably, the plurality of dispersion holes 72 are uniformly arranged around the axis of the rotor 41 and the dispersion holes 72 are arranged in the radial direction of the rotor 41 so that the cooling water sprayed from among the plurality of dispersion holes 72 can be uniformly sprayed onto the inner wall of the cutting drum 5.
In this embodiment, the fixing groove 411 is opened to the one end that rotor 41 is close to chuck 61, and the fixing groove 411 runs through chuck 61 towards the direction that deviates from rocker arm body 1, and one side fixedly connected with that water diversion pressure disk 7 is close to rocker arm body 1 imbeds in the fixing groove 411 and with the fixed block 73 of the mutual complex of fixing groove 411. The water inlet hole 71 penetrates the fixed block 73 toward a direction close to the rocker arm body 1.
The working principle of the rocker arm applying the permanent magnet motor when in use is as follows: the rotor 41 of the permanent magnet motor 4 directly drives the cutting drum 5 to rotate through the chuck 61 on the driving disc 6, and the rotating speed of the cutting drum 5 is equal to that of the rotor 41 of the permanent magnet motor 4. During operation, cooling water enters the cooling water channel 8 through the water distribution disk 9 to cool the rotor 41, then enters the water inlet holes 71, and is sprayed onto the inner wall of the cutting drum 5 through the distribution holes 72 to cool the cutting drum 5.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. The utility model provides an use permanent-magnet machine's rocking arm which characterized in that: comprises a rocker arm body (1);
the cutting part (2) is arranged at one end of the rocker arm body (1);
the connecting part (3) is arranged at one end of the rocker arm body (1) deviating from the cutting part (2), the cutting part (2) and the connecting part (3) are positioned at two opposite sides of the rocker arm body (1), and the connecting part (3) is used for being connected with a coal mining machine;
the cutting drum (5) is sleeved outside the cutting part (2) and is rotationally connected with the cutting part (2);
and the permanent magnet motor (4) is arranged in the cutting part (2), and a rotor (41) of the permanent magnet motor (4) directly drives the cutting drum (5) to rotate.
2. The rocker arm using the permanent magnet motor according to claim 1, wherein: the permanent magnet motor (4) adopts a permanent magnet motor (4) of the type TBVF-480-60 or the type TBVF-750-96 of Nanyang explosion-proof motor GmbH.
3. The rocker arm using the permanent magnet motor according to claim 1, wherein: a chuck (61) is fixed on a rotor (41) of the permanent magnet motor (4), a connecting ring (51) is sleeved on the outer side of the chuck (61), the connecting ring (51) is fixed on the cutting drum (5), and the chuck (61) drives the connecting ring (51) to rotate.
4. The rocker arm using the permanent magnet motor as claimed in claim 3, wherein: the section of the chuck (61) is arranged in a polygonal mode, and the inner side of the connecting ring (51) is attached to the outer side of the chuck (61).
5. The rocker arm using the permanent magnet motor as claimed in claim 3, wherein: the outer side of a rotor (41) of the permanent magnet motor (4) is sleeved with a driving disc (6) fixed on the rotor (41), and a chuck (61) is fixed on the driving disc (6).
6. The swing arm using the permanent magnet motor according to claim 5, wherein: the driving disk (6) is connected with the rotor (41) in a key connection mode.
7. The rocker arm using the permanent magnet motor according to claim 1, wherein: a cooling water channel (8) is formed in one side, away from the cutting part (2), of the rocker arm body (1), the cooling water channel (8) penetrates through the rocker arm and the rotor (41), and cooling water for cooling the rotor (41) of the permanent magnet motor (4) flows through the cooling water channel (8).
8. The rocker arm using the permanent magnet motor according to claim 7, wherein: the end part of the rotor (41) of the permanent magnet motor (4) is provided with a water distribution pressure plate (7), and the water distribution pressure plate (7) receives cooling water flowing out of the rotor (41) and sprays the cooling water onto the inner wall of the cutting drum (5).
9. The swing arm using the permanent magnet motor according to claim 8, wherein: one side of the water diversion pressure plate (7) close to the rotor (41) is provided with a water inlet hole (71) communicated with the cooling water channel (8), and the outer side of the water inlet hole (71) is provided with a plurality of dispersion holes (72) penetrating through the water diversion pressure plate (7) outwards.
10. The rocker arm using the permanent magnet motor according to claim 7, wherein: one side, away from the cutting part (2), of the rocker arm body (1) is fixedly connected with a water distribution disc (9), the water distribution disc (9) is used for supplying water to the cooling water channel (8), and a connector (92) connected with a water inlet pipeline is fixedly connected to the water distribution disc (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011048852.XA CN112072850A (en) | 2020-09-29 | 2020-09-29 | Rocker arm applying permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011048852.XA CN112072850A (en) | 2020-09-29 | 2020-09-29 | Rocker arm applying permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112072850A true CN112072850A (en) | 2020-12-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011048852.XA Pending CN112072850A (en) | 2020-09-29 | 2020-09-29 | Rocker arm applying permanent magnet motor |
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| CN (1) | CN112072850A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877841A (en) * | 2012-09-07 | 2013-01-16 | 山西晋煤集团金鼎煤机矿业有限责任公司 | Drum-type coal cutter rocker arm |
| CN203022741U (en) * | 2012-11-29 | 2013-06-26 | 唐山开滦广汇设备制造有限公司 | Spray cooling system of coal mining machine |
| CN103334750A (en) * | 2013-06-24 | 2013-10-02 | 山西晋城无烟煤矿业集团有限责任公司 | Novel shearer rocker arm |
| CN204041070U (en) * | 2014-03-17 | 2014-12-24 | 北京百正创源科技有限公司 | The transmission system of a kind of Novel down-hole coal mining and digging device |
| CN204200226U (en) * | 2014-08-15 | 2015-03-11 | 天地上海采掘装备科技有限公司 | For water valve and the coal-winning machine of coal-winning machine |
| CN204877466U (en) * | 2015-07-30 | 2015-12-16 | 连云港天明装备有限公司 | Water cooling shearer rocking arm |
| CN212392765U (en) * | 2020-09-29 | 2021-01-22 | 郑州煤机智能工作面科技有限公司 | Rocker arm applying permanent magnet motor |
-
2020
- 2020-09-29 CN CN202011048852.XA patent/CN112072850A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877841A (en) * | 2012-09-07 | 2013-01-16 | 山西晋煤集团金鼎煤机矿业有限责任公司 | Drum-type coal cutter rocker arm |
| CN203022741U (en) * | 2012-11-29 | 2013-06-26 | 唐山开滦广汇设备制造有限公司 | Spray cooling system of coal mining machine |
| CN103334750A (en) * | 2013-06-24 | 2013-10-02 | 山西晋城无烟煤矿业集团有限责任公司 | Novel shearer rocker arm |
| CN204041070U (en) * | 2014-03-17 | 2014-12-24 | 北京百正创源科技有限公司 | The transmission system of a kind of Novel down-hole coal mining and digging device |
| CN204200226U (en) * | 2014-08-15 | 2015-03-11 | 天地上海采掘装备科技有限公司 | For water valve and the coal-winning machine of coal-winning machine |
| CN204877466U (en) * | 2015-07-30 | 2015-12-16 | 连云港天明装备有限公司 | Water cooling shearer rocking arm |
| CN212392765U (en) * | 2020-09-29 | 2021-01-22 | 郑州煤机智能工作面科技有限公司 | Rocker arm applying permanent magnet motor |
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Application publication date: 20201211 |