CN214331394U - Rack rail wheel transmission mechanism for coal mining machine - Google Patents
Rack rail wheel transmission mechanism for coal mining machine Download PDFInfo
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- CN214331394U CN214331394U CN202120354573.XU CN202120354573U CN214331394U CN 214331394 U CN214331394 U CN 214331394U CN 202120354573 U CN202120354573 U CN 202120354573U CN 214331394 U CN214331394 U CN 214331394U
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Abstract
The utility model discloses a toothed rail wheel transmission mechanism for a coal mining machine, which comprises a convex toothed rail wheel arranged on the coal mining machine and a pin rail arranged on a scraper conveyor and matched with the convex toothed rail wheel; the cross section of the gear teeth of the convex gear rail wheel is of a convex cambered surface structure, the pitch P of the convex gear rail wheel is 201mm, and the pin rail is provided with concave cross section pin rail gear teeth meshed with the gear teeth of the convex gear rail wheel. The convex rack rail wheel is arranged, compared with the traditional rack rail wheel with a straight section, the convex rack rail wheel has larger meshing area with the pin rail, and can also reduce the meshing stress of the rack rail wheel and the pin rail; meanwhile, the situations of extrusion collapse and stress concentration of edges of the toothed end when the straight section toothed rail wheel is meshed with the pin rail can be effectively avoided, the convex toothed rail wheel is better in adaptability, and the service life is longer.
Description
Technical Field
The utility model belongs to the technical field of coal mine equipment, especially, relate to a rack and pinion drive mechanism for coal-winning machine.
Background
At present, the coal mining machine adopts an alternating-current variable-frequency electric traction mode, a traction motor transmits torque to a rack wheel after being decelerated by a traction reduction box, the rack wheel rotates to be meshed with a pin rail of a scraper conveyor to drive the coal mining machine to walk left and right along the direction of a coal face, and the meshing principle of the rack wheel and the pin rail is the same as the gear-rack transmission principle. Therefore, the gear rack wheel bears the important tasks of transmitting torque and driving the coal mining machine to travel in the working process and is an important part of a traveling system of the coal mining machine.
When the rack rail wheel is used as a special gear and is meshed with a pin rail of a scraper conveyor, working conditions such as cutting resistance of coal cut by a coal cutter, walking resistance generated by the self weight of the coal cutter, additional resistance of large coal and gangue to the coal cutter and the like need to be borne, the actual working condition is severe, and the stress condition is complex. The rack wheel needs to withstand the test of severe working conditions such as heavy load, impact, vibration, no lubrication and the like, the abrasion of the rack wheel is inevitable and is the most important wearing part in parts of the coal mining machine, and the service life and the performance of the rack wheel directly determine whether the coal mining machine can normally run or not and determine whether the working surface of the coal mining machine can safely, highly productively and efficiently produce or not. Along with the development of a coal seam with an ultra-large mining height, the requirement of a coal mine on the one-time mining total height is more and more urgent, the increase of the coal mining height inevitably causes the continuous increase of the height, the length and the weight of a machine body of the coal mining machine, the traction force, the impact and the vibration which need to be born by a toothed rail wheel are more severe, the working condition is worse, the existing small-pitch toothed rail wheel cannot meet the use requirement of the coal mining machine with the ultra-large mining height, and the mining efficiency of the coal mining machine is severely restricted.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the present invention is to provide a rack-rail wheel transmission mechanism for coal mining machine, which can reduce the engaging stress between the rack-rail wheel and the pin rail by arranging a convex rack-rail wheel, compared with the traditional straight-section rack-rail wheel, and the engaging area of the pin rail is larger; meanwhile, the situations of extrusion collapse and stress concentration of edges of the toothed end when the straight section toothed rail wheel is meshed with the pin rail can be effectively avoided, the convex toothed rail wheel is better in adaptability, and the service life is longer.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a rack rail wheel drive mechanism for coal-winning machine which characterized in that: the device comprises a convex rack rail wheel arranged on a coal mining machine and a pin rail which is arranged on a scraper conveyor and matched with the convex rack rail wheel; the cross section of the gear teeth of the convex gear rail wheel is of a convex cambered surface structure, the pitch P of the convex gear rail wheel is 201mm, and the pin rail is provided with concave cross section pin rail gear teeth meshed with the gear teeth of the convex gear rail wheel.
Compared with the prior art, the utility model has the following advantage:
1. the convex rack rail wheel is arranged, compared with the traditional rack rail wheel with a straight section, the convex rack rail wheel has larger meshing area with the pin rail, and can also reduce the meshing stress of the rack rail wheel and the pin rail; meanwhile, the situations of extrusion collapse and stress concentration of edges of the toothed end when the straight section toothed rail wheel is meshed with the pin rail can be effectively avoided, the convex toothed rail wheel is better in adaptability, and the service life is longer.
2. The cross section of the convex gear rail wheel teeth in the utility model is of a convex cambered surface structure, so that the convex gear rail wheel angular displacement compensation amount is large and the adaptability is good when the bottom plate of the fully mechanized mining face is uneven and the pin rail is horizontally and vertically bent and changed; the transmission torque is large in the walking process, the efficiency is high, the maintenance period is shortened, and the labor intensity of coal mine workers is reduced.
3. The pitch P of convex rack rail wheel is 201mm, has increased tooth thickness and tooth width, corresponding increase bearing capacity, anti-vibration, impact ability are stronger, make the coal-winning machine move more steadily.
In summary, the convex toothed rail wheel is arranged, so that the meshing area of the convex toothed rail wheel and the pin rail is larger than that of the traditional straight section toothed rail wheel, and the meshing stress of the toothed rail wheel and the pin rail can be reduced; meanwhile, the situations of extrusion collapse and stress concentration of edges of the toothed end when the straight section toothed rail wheel is meshed with the pin rail can be effectively avoided, the convex toothed rail wheel is better in adaptability, and the service life is longer.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
Description of reference numerals:
1-a convex rack wheel; 2-pin track; 2-1-pin track gear teeth with concave cross section.
Detailed Description
As shown in fig. 1 and 2, the utility model comprises a convex rack wheel (1) arranged on the coal mining machine and a pin rail 2 arranged on the scraper conveyor and matched with the convex rack wheel 1; the cross section of the gear teeth of the convex gear rail wheel 1 is of a convex cambered surface structure, the pitch P of the convex gear rail wheel 1 is 201mm, and the pin rail 2 is provided with pin rail gear teeth 2-1 with concave cross sections, which are meshed with the gear teeth of the convex gear rail wheel 1.
When the gear rack wheel is actually used, the convex gear rack wheel 1 is arranged, compared with the traditional straight section gear rack wheel, the meshing area of the convex gear rack wheel and the pin rail 2 is larger, and the meshing stress of the gear rack wheel and the pin rail can be reduced; meanwhile, the situations of extrusion collapse and concentrated stress of the edge of the tooth end when the straight section rack rail wheel is meshed with the pin rail 2 can be effectively avoided, the convex rack rail wheel 1 is better in adaptability and longer in service life.
The cross section of the gear teeth of the convex gear rail wheel 1 is of a convex cambered surface structure, so that when the bottom plate of the fully mechanized mining face is uneven, and the pin rail 2 is bent horizontally and vertically, the compensation amount of angular displacement of the convex gear rail wheel 1 is large, and the adaptability is good; the transmission torque is large in the walking process, the efficiency is high, the maintenance period is shortened, and the labor intensity of coal mine workers is reduced.
In addition, the pitch P of the convex track wheel 1 is 201mm, so that the tooth thickness and the tooth width are increased, the bearing capacity is correspondingly increased, the vibration and impact resistance is stronger, and the operation of the coal mining machine is more stable.
It should be noted that the pin track 2 is fixed on the scraper conveyor by a pin shaft, and the pitch of the convex rack-and-rail wheel 1 is the distance between the corresponding point arcs between two adjacent teeth, that is, the linear distance of the same point on two adjacent teeth of the convex rack-and-rail wheel 1 in the reference circle direction is the same as the distance between two adjacent teeth of the pin track 2.
Specifically, as shown in fig. 2, B2 and C2 indicated by dotted lines represent the meshing line and the tooth thickness of the rack and pinion having a straight cross-sectional shape, respectively, and B1 and C1 indicated by solid lines represent the meshing line and the tooth thickness of the convex rack and pinion 1, respectively, and the cross section of the gear tooth of the convex rack and pinion 1 is designed to be a convex arc surface so that the actual meshing line B1 of the convex rack and pinion 1 and the pin track 2 is increased as compared with the meshing line B2 of the rack and pinion having a straight cross-sectional shape; so that the gear tooth thickness C1 of the male rack gear 1 is increased over the straight cross-section shaped rack gear tooth thickness C2; the increase of the meshing line leads the meshing area of the convex rack rail wheel 1 and the pin rail 2 to be increased; the increase in the thickness of the teeth of the gear increases the strength and rigidity of the male track wheel 1 itself.
The bearing capacity of the convex rack rail wheel 1 can be improved by increasing the meshing area of the convex rack rail wheel 1 and the pin rail 2 and the strength and rigidity of the convex rack rail wheel 1. In addition, the meshing stress of the convex gear rail wheel 1 and the pin rail 2 can be reduced when the convex gear rail wheel 1 and the pin rail 2 are meshed, and the risk that teeth are broken due to extrusion of the tooth end edge and the pin rail 2 and stress concentration of the convex gear rail wheel 1 is reduced, so that the adaptability of the convex gear rail wheel 1 is improved, and the service life of the convex gear rail wheel 1 is prolonged.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (1)
1. The utility model provides a rack rail wheel drive mechanism for coal-winning machine which characterized in that: the coal mining machine comprises a convex rack rail wheel (1) arranged on a coal mining machine and a pin rail (2) which is arranged on a scraper conveyor and matched with the convex rack rail wheel (1); the cross section of the gear teeth of the convex gear rail wheel (1) is of a convex cambered surface structure, the pitch P of the convex gear rail wheel (1) is 201mm, and concave cross section pin rail gear teeth (2-1) meshed with the gear teeth of the convex gear rail wheel (1) are arranged on the pin rail (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120354573.XU CN214331394U (en) | 2021-02-08 | 2021-02-08 | Rack rail wheel transmission mechanism for coal mining machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120354573.XU CN214331394U (en) | 2021-02-08 | 2021-02-08 | Rack rail wheel transmission mechanism for coal mining machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214331394U true CN214331394U (en) | 2021-10-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120354573.XU Active CN214331394U (en) | 2021-02-08 | 2021-02-08 | Rack rail wheel transmission mechanism for coal mining machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214331394U (en) |
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2021
- 2021-02-08 CN CN202120354573.XU patent/CN214331394U/en active Active
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