Traction part of thin seam mining machine

Abstract

The utility model provides a traction part of a thin seam mining machine, which comprises a base body, and a coal passing space is arranged between the lower part of the base body and a scraper conveyer; a traction motor is arranged, the traction motor is fixedly connected with the base body, and the traction motor is sequentially connected with a straight tooth speed reducing mechanism, a first-stage planetary speed reducing mechanism and a second-stage planetary speed reducing mechanism and drives walking wheels to operate through the second-stage planetary speed reducing mechanism. And the first-stage planetary speed reducing mechanism and the second-stage planetary speed reducing mechanism are respectively arranged on two sides of the coal passing space. The overall length of the two-stage planetary speed reducing mechanism is shortened, a larger coal passing space is reserved, the highest position of the coal passing space is closer to the center of the scraper conveyer, and the coal passing capacity is improved.

Description

Technical Field

[0001] The utility model relates to the field of coal mining equipment, in particular to a traction unit of a shearer for thin coal seams. Background Art

[0002] The traction unit of a shearer is an important part of the shearer. It is responsible for providing power for the shearer so that it can move on the working face. There is a coal passing space between the traction unit and the scraper conveyor, and the size of the coal passing space can determine the operation ability and working efficiency of the shearer.

[0003] There is a utility model patent with the publication number CN203050701U, which discloses a traction unit of a shearer with a bridge structure for thin coal seams. The main defect of this technical solution is that the two-stage reduction mechanism of the double planetary reducer adopts an integral structure and is connected by a fixed gear ring in the middle. This makes the double planetary reducer can only be arranged on one side of the coal passing space, and the overall volume is relatively large, resulting in a small size of the coal passing space between the traction unit and the scraper conveyor, and the highest point of the coal passing space is biased to one side, with insufficient coal passing capacity. Content of the Utility Model

[0004] The purpose of the utility model is to provide a traction unit of a shearer for thin coal seams aiming at the defects existing in the above technologies. The first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism are separately arranged on both sides of the coal passing space. On the one hand, the fixed gear ring structure between the first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism is cancelled, shortening the overall length of the two-stage planetary reduction mechanism and leaving a larger coal passing space; on the other hand, the highest point of the coal passing space is closer to the center of the scraper conveyor, improving the coal passing capacity.

[0005] The purpose of the utility model is achieved as follows: It includes a base body, and there is a coal passing space between the lower part of the base body and the scraper conveyor; a traction motor is provided, and the traction motor is fixedly connected to the base body. The traction motor is sequentially connected to a spur gear reduction mechanism, a first-stage planetary reduction mechanism, and a second-stage planetary reduction mechanism, and drives a walking wheel to operate through the second-stage planetary reduction mechanism. The first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism are respectively arranged on both sides of the coal passing space.

[0006] In the above structure, the first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism are connected by a second sun gear shaft. A first spline sleeve is provided at the output end of the first-stage planetary reduction mechanism. One end of the second sun gear shaft is connected to the first spline sleeve, and the other end is connected to the second-stage planetary reduction mechanism.

[0007] In the above structure, the first-stage planetary reduction mechanism is connected to the spur reduction mechanism through the first sun gear shaft. The first-stage planetary reduction mechanism includes a first sun gear shaft, a first cage, first planet gears, and a first internal gear ring. The number of the first planet gears is one or more. When the number of the first planet gears is more than one, they are evenly arranged along the circumference of the first sun gear shaft. The first planet gears are simultaneously meshed with the first internal gear ring and the first sun gear shaft, and the first planet gears are connected to the spur reduction mechanism through the first sun gear shaft.

[0008] In the above structure, the second-stage planetary reduction mechanism includes second planet gears which are evenly arranged along the circumference of the second sun gear shaft and meshed with the second sun gear shaft; it includes a second internal gear ring which is concentric with the second sun gear shaft, and the second planet gears are meshed with the second internal gear ring; it includes a second cage, and the second planet gears are connected to the second cage through a rotating shaft. The second planet gears are driven to rotate by the second sun gear shaft, thereby driving the second cage to rotate. The second cage is connected to a torque shaft, and the other end of the torque shaft is connected to a walking wheel.

[0009] In the above structure, the material of the second planet gears is 18Cr2Ni4WA. In the prior art, the material of the second planet gears generally adopts 20CrMnTi or 20Cr2Ni4. In this technical solution, the material is heat-treated, that is, nitro salt isothermal quenching + cryogenic treatment is adopted. On the premise of ensuring strength and service life, the thickness of the gears is reduced, and the coal passing space can be increased.

[0010] In the above structure, the width of the coal passing space at the highest position of the matrix is 213 mm. In the prior art, the width of the coal passing space at the highest position is generally 160 mm. After the first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism are separately arranged on both sides of the coal passing space, the highest coal passing space width is upgraded to 213 mm, improving the coal passing capacity.

[0011] The beneficial effects of the present utility model: The first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism of the traction part are separately arranged on both sides of the coal passing space. On the one hand, the fixed gear ring structure between the first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism is cancelled, shortening the overall length of the two-stage planetary reduction mechanism and leaving a larger coal passing space; in addition, the highest part of the coal passing space is closer to the center of the scraper conveyor, improving the coal passing capacity. Description of the Drawings

[0012] Figure 1 is a schematic diagram of the traction part structure of the present utility model Figure 1 ;

[0013] Figure 2 is a schematic diagram of the traction part structure of the present utility model Figure 2 ;

[0014] Figure 3 is a schematic diagram of the traction part structure of the present utility model Figure 3 ;

[0015] Figure 4 is a schematic diagram of the structure of the first-stage planetary reduction mechanism of the present utility model;

[0016] Figure 5 is a schematic diagram of the structure of the second-stage planetary reduction mechanism of the present utility model. Specific embodiments

[0017] The present application provides a shearer traction part for thin coal seams. The first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism of the traction part are separately arranged and are respectively arranged on both sides of the coal passing space. On the one hand, the fixed ring gear structure between the first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism is cancelled, so that the overall length of the two-stage planetary reduction mechanism is shortened, leaving a larger coal passing space; in addition, the highest point of the coal passing space is closer to the center of the scraper conveyor, improving the coal passing capacity. The problem of insufficient coal passing capacity of the traction part in the prior art is solved.

[0018] The following further illustrates this embodiment with reference to the drawings:

[0019] From Figure 1 — Figure 4 it can be seen that the present application includes a base body 1, and there is a coal passing space 3 between the lower part of the base body 1 and a scraper conveyor 2. The base body 1 is provided with a traction motor 110, the traction motor 110 is fixedly connected to the base body 1, the traction motor 110 is sequentially connected to a spur gear reduction mechanism 120, a first-stage planetary reduction mechanism 130, and a second-stage planetary reduction mechanism 140, and drives a walking wheel 4 to operate through the second-stage planetary reduction mechanism 140. The first-stage planetary reduction mechanism 130 and the second-stage planetary reduction mechanism 140 are respectively arranged on both sides of the coal passing space 3. In this embodiment, the first-stage planetary reduction mechanism 130 and the second-stage planetary reduction mechanism 140 are respectively arranged on both sides of the coal passing space 3. On the one hand, a split design is adopted, and the fixed ring gear structure between the two-stage planetary reduction mechanisms is cancelled, so that the overall length of the two-stage planetary reduction mechanism is reduced, increasing the coal passing space 3; on the other hand, the position of the coal passing space 3 moves towards the center of the scraper conveyor 2, also increasing the coal passing capacity.

[0020] On the basis of the above embodiments, preferably, the first-stage planetary reduction mechanism 130 is connected to the second-stage planetary reduction mechanism 140 through the second sun gear shaft 5. A first spline sleeve 131 is provided at the output end of the first-stage planetary reduction mechanism 130. One end of the second sun gear shaft 5 is connected to the first spline sleeve 131, and the other end is connected to the second-stage planetary reduction mechanism 140. In this embodiment, a connection method for the first-stage planetary reduction mechanism 130 and the second-stage planetary reduction mechanism 140 is provided. By using the spline shaft 5 for connection, large-torque transmission can be achieved, and the transmission effect is stable.

[0021] On the basis of the above embodiments, preferably, the first-stage planetary reduction mechanism 130 is connected to the spur reduction mechanism through the first sun gear shaft 135. The first-stage planetary reduction mechanism 130 includes a first sun gear shaft 135, a first cage 132, first planet gears 133, and a first internal gear ring 134. The number of the first planet gears 133 is one or more. When the number of the first planet gears 133 is multiple, they are evenly arranged along the circumference of the first sun gear shaft 135. The first planet gears 133 are simultaneously meshed with the first internal gear ring 134 and the first sun gear shaft 135. The first planet gears 133 are connected to the spur reduction mechanism 120 through the first sun gear shaft 135. In this embodiment, while the first planet gears 133 rotate on their own, they revolve around the first sun gear shaft 135 and drive the first cage 132 to rotate. The number of the first planet gears 133 is 3, and multiple first planet gears 133 are evenly distributed along the circumference of the first sun gear shaft 135. The first cage 132 is used to fix the relative positions of the first planet gears 133 and serves as an output device to transmit torque and speed.

[0022] Based on the above embodiments, preferably, the second-stage planetary reduction mechanism 140 includes at least two second planet gears 141. The second planet gears 141 are evenly arranged along the circumference of the second sun gear shaft 5 and mesh with the second sun gear shaft 5. It includes a second internal gear ring 142 which is concentrically arranged with the second sun gear shaft 5, and the second planet gears 141 mesh with the second internal gear ring 142. It further includes a second cage 143. The second planet gears 141 are connected to the second cage 143 through a rotating shaft 144. The second sun gear shaft 5 drives the second planet gears 141 to rotate, thereby driving the second cage 143 to rotate. The second cage 143 is connected to a torque shaft 6, and the other end of the torque shaft 6 is connected to a traveling wheel 4. In this embodiment, while the second planet gears 141 rotate on their own, they revolve around the second sun gear shaft 5 and drive the second cage 143 to rotate. The number of the second planet gears 141 is 4, and multiple second planet gears 141 are evenly distributed along the circumference of the second sun gear shaft 5. The second cage is used to fix the relative positions of the second planet gears 141 and serves as an output device to transmit torque and speed. In this embodiment, the second cage 141 and the torque shaft 5 are of an integral structure.

[0023] Based on the above embodiments, preferably, the material of the second planet gear 141 is 18Cr2Ni4WA. In the prior art, the material of the second planet gear 141 generally adopts 20CrMnTi or 20Cr2Ni4. In this technical solution, the material is heat-treated, that is, nitrite isothermal quenching + cryogenic treatment is adopted. On the premise of ensuring strength and service life, the gear thickness is reduced, and the coal passing space 3 can be increased.

[0024] Based on the above embodiments, preferably, the width of the coal passing space 3 at the highest position of the base 1 is 213 mm. In the prior art, the width of the coal passing space 3 at the highest position is generally 160 mm. After the first-stage planetary reduction mechanism 130 and the second-stage planetary reduction mechanism 140 are separately arranged and respectively arranged on both sides of the coal passing space 3, the width of the coal passing space 3 at the highest position is upgraded to 213 mm, improving the coal passing capacity.

[0025] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A traction unit for a shearer in thin coal seams, characterized by comprising: A base body, with a coal passing space provided between the lower part of the base body and a scraper conveyor; A traction motor, fixedly connected to the base body. The traction motor is sequentially connected to a spur gear reduction mechanism, a first-stage planetary reduction mechanism, and a second-stage planetary reduction mechanism, and drives a walking wheel to operate through the second-stage planetary reduction mechanism. The first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism are respectively arranged on both sides of the coal passing space.

2. The traction unit of a thin coal seam shearer according to claim 1, characterized in that, The first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism are connected by a second sun gear shaft. A first spline sleeve is provided at the output end of the first-stage planetary reduction mechanism. One end of the second sun gear shaft is connected to the first spline sleeve, and the other end is connected to the second-stage planetary reduction mechanism.

3. The haulage unit of a thin coal seam shearer according to claim 2, characterized in that, The first-stage planetary reduction mechanism and the spur gear reduction mechanism are connected by a first sun gear shaft. The first-stage planetary reduction mechanism includes a first sun gear shaft, a first cage, first planetary gears, and a first internal gear ring. The number of the first planetary gears is one or more. When the number of the first planetary gears is more than one, they are evenly arranged along the circumference of the first sun gear shaft. The first planetary gears are simultaneously meshed with the first internal gear ring and the first sun gear shaft. The first planetary gears are connected to the spur gear reduction mechanism through the first sun gear shaft.

4. A traction unit of a thin coal seam shearer according to claim 2, characterized in that, The second-stage planetary reduction mechanism includes: Second planetary gears, evenly arranged along the circumference of the second sun gear shaft and meshed with the second sun gear shaft; A second internal gear ring, concentrically arranged with the second sun gear shaft, and the second planetary gears are meshed with the second internal gear ring; A second cage, the second planetary gears are connected to the second cage through a rotating shaft. The second sun gear shaft drives the second planetary gears to rotate, thereby driving the second cage to rotate. The second cage is connected to a torque shaft, and the other end of the torque shaft is connected to the walking wheel.

5. A traction unit of a thin coal seam shearer according to claim 4, characterized in that, The material of the second planetary gears is 18Cr2Ni4WA.

6. The haulage unit of a thin coal seam shearer according to claim 1, characterized in that, The width of the coal passing space at the highest position of the base body is 213 mm.

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