Thin seam short span coal cutter rear main body

Abstract

The present application relates to a kind of short span shortwall coal face machine rear main body, including left and right extension strip-shaped rear main body shell, the front end surface of the middle part of rear main body shell is equipped with several positioning pin holes for installing front main body shell, the bottom surface of the left and right parts of rear main body shell is respectively equipped with left and right two loading cavities, loading cavity is by front and rear extension, groove mouth downward groove, loading cavity front end is open and rear end is closed, loading cavity constitutes part of inner loading channel, left and right two crushing mechanism installation cavities are further provided in rear main body shell, wherein crushing mechanism is installed, and large coal rock between the rear main body shell and the conveying groove is crushed, the front of rear main body shell is equipped with left and right two support shoes, for separating inner and outer loading channels with drum center line as boundary.The present application can improve loading effect, reduce the occurrence of large coal rock between the rear of machine body and conveyor, can improve the problem of coal face machine gravity center, improve the stability of whole machine.

Description

TECHNICAL FIELD

[0001] The present application relates to a local machine body structure of a coal mining machine, which is suitable for a thin seam coal mining machine and can cooperate with a specific structure of a rocker arm to obtain a better coal loading effect and improve the problem of the center of gravity of the coal mining machine. BACKGROUND

[0002] The existing suspended machine body thin seam coal mining machine usually loads outward from the inside of the drum, and the effective loading blade area on the drum is small, and the loading effect is poor. At the same time, the outward throwing mode is also easy to cause large coal and rock to be clamped in the limited height space between the rear part of the machine body and the conveyor, affecting the passing of the coal mining machine.

[0003] In addition, the existing thin seam coal mining machine has a complex suspended machine body section structure, a long left-right direction size, and a large weight of the suspended machine body section, which causes the center of gravity of the coal mining machine to be biased to the coal wall side, thereby causing poor running stability and rapid wear of parts such as the sliding shoe, and seriously affecting the performance of the whole machine. SUMMARY

[0004] The present application aims to provide a thin seam short span coal mining machine rear main body part, which can improve the loading effect, reduce the occurrence of large coal and rock clamping between the rear part of the machine body and the conveyor, improve the problem of the center of gravity of the coal mining machine, and improve the stability of the whole machine.

[0005] The main technical scheme of the present application is as follows:

[0006] A thin seam short span coal mining machine rear main body part includes a rear main body part shell extending in the left-right direction in a strip shape, a plurality of positioning pin holes are arranged on the front end face of the middle part of the rear main body part shell, and two loading cavities are arranged on the bottom faces of the left and right parts of the rear main body part shell respectively.

[0007] The top face of the loading cavity is divided into two sections, the front section is a horizontal face, and the rear section is an inclined face with a high front and a low rear.

[0008] An electrical cavity is arranged in the middle part of the rear main body part shell in the left-right direction.

[0009] Two crushing mechanism mounting cavities are arranged in the rear main body part shell, and the parts of the rear main body part shell other than the loading cavities, the electrical cavity, and the crushing mechanism mounting cavities are solid structures.

[0010] Two supporting sliding shoes are arranged in front of the rear main body part shell, and the two supporting sliding shoes are arranged close to the left and right end parts of the rear main body part shell respectively.

[0011] Two side guide plates are arranged on the supporting sliding shoes, and the two side guide plates are arranged vertically, and the rear sides of the two side guide plates face the left rear and the right rear respectively.

[0012] The crushing mechanism is installed in the left and right crushing mechanism installation cavities or one of the left and right crushing mechanism installation cavities, and the crushing mechanism comprises a crushing torque shaft, a front-stage gear transmission mechanism, a rear-stage gear transmission mechanism and a crushing roller shaft which are sequentially transmission-connected, a plurality of cutter heads are arranged side by side on the crushing roller shaft and are fixed in the circumferential direction, an elongated hollow gear shaft is arranged at the input end of the front-stage gear transmission mechanism, an external gear and an internal spline are arranged at the front end and the rear end of the hollow gear shaft respectively, the hollow gear shaft is coaxially sleeved on the crushing torque shaft, the front end of the crushing torque shaft is exposed to the front of the hollow gear shaft, the front end of the crushing torque shaft is the power input end thereof, the rear end of the crushing torque shaft is spline-coupled with the rear end of the hollow gear shaft, and the other parts of the crushing torque shaft are not in contact with the hollow gear shaft; an elongated solid gear shaft is arranged at the input end of the rear-stage gear transmission mechanism, an external spline and an external gear are arranged at the front end and the rear end of the solid gear shaft respectively, the front end of the solid gear shaft is inserted into the core spline hole of the output end gear of the front-stage gear transmission mechanism and is spline-coupled therewith, the rear end of the crushing roller shaft is provided with an external spline, and the rear end of the crushing roller shaft is inserted into the core spline hole of the output end gear of the rear-stage gear transmission mechanism and is spline-coupled therewith; the crushing mechanism installation cavity comprises a hollow gear shaft installation cavity, a front-stage gear transmission mechanism installation cavity, a solid gear shaft installation cavity, a rear-stage gear transmission mechanism installation cavity and a crushing roller installation cavity which are sequentially communicated in sequence, the crushing mechanism installation cavity as a whole is in an S shape, the hollow gear shaft, the front-stage gear transmission mechanism except the hollow gear shaft, the solid gear shaft, the rear-stage gear transmission mechanism except the solid gear shaft and the crushing roller shaft are respectively installed in the above installation cavities, and the left and right loading cavities are respectively located between the left and right crushing roller installation cavities and the solid gear shaft installation cavities.

[0013] The middle part of the bottom surface of the rear main body part shell in the front-rear direction is arranged as a groove extending leftward and rightward, the front-stage gear transmission mechanism installation cavity is located at the thick wall in front of the groove, the rear-stage gear transmission mechanism installation cavity is located at the thick wall in the rear of the groove, the front ends of the crushing roller shaft, the solid gear shaft, the hollow gear shaft and the crushing torque shaft are located in front of the groove, and the rear ends of the crushing roller shaft, the solid gear shaft, the hollow gear shaft and the crushing torque shaft are located in the rear of the groove.

[0014] The front end surface of the rear main body part shell is detachably provided with two support plates corresponding to the crushing mechanism installation cavities, the support plates on the same side of the crushing mechanism are provided with front bearings, the crushing roller installation cavities are provided with rear bearings, and the front and rear ends of the crushing roller shaft are respectively supported on the corresponding front and rear bearings.

[0015] The left and right crushing roller shaft installation cavities are respectively close to the left end and the right end of the rear main body part shell.

[0016] The beneficial effects of the present application are as follows:

[0017] This invention adds an internal loading channel by setting a loading cavity on the rear main body shell, which guides the coal flow entering the inner side of the drum centerline into the conveyor trough. Compared with the existing thin coal seam mining machines that only have an external loading channel, this invention can significantly improve the coal loading effect.

[0018] Because the rear main body shell has two crushing mechanism installation cavities on the left and right, the installation space problem of the crushing mechanism on thin coal seam mining machines is solved. Each crushing mechanism installation cavity houses a crushing mechanism that can promptly crush large pieces of coal and rock entering between the rear main body shell and the conveyor trough, preventing large pieces of coal and rock from getting stuck between the machine body and the conveyor trough and obstructing the movement of the mining machine. This also solves problems such as the conveyor scraper pulling too hard, causing chain breakage, and the mining machine getting stuck due to traction issues.

[0019] This invention effectively separates the outer loading channel from the inner loading channel by installing two left and right support slippers at the front of the rear main body shell. This reduces the impact of the outer coal flow on the inner coal flow when the coal mining machine moves, thereby guiding more coal flow from the outer loading channel into the conveyor. This not only improves the overall coal loading effect but also allows the crushing mechanism to crush more coal.

[0020] Except for the loading chamber, electrical chamber, and crushing mechanism mounting chamber, the main body shell of the rear part is basically a solid structure, which shifts the center of gravity of the whole machine towards the goaf side, which helps to balance the weight of the swing arm of the coal mining machine and maintain good stability of the whole machine. Attached Figure Description

[0021] Figure 1 This is a top sectional view of an embodiment of the rear main body of the present invention;

[0022] Figure 2 This is a side view of an embodiment of the rear main body of the present invention;

[0023] Figure 3 This is a top enlarged view of the supporting slipper;

[0024] Figure 4 This is a schematic diagram of the crushing mechanism and its mounting cavity;

[0025] Figure 5 This is a top sectional view of an embodiment of a thin coal seam short-span coal mining machine employing the rear main body of the present invention.

[0026] Figure label:

[0027] 1. Rocker arm; 21. Front main body; 22. Rear main body; 221. Rear main body housing; 2211. Front end face; 2212. Locating pin hole; 2214. Loading cavity; 22141. Front section; 22142. Rear section; 2215. Crushing mechanism mounting cavity; 22151. Hollow gear shaft mounting cavity; 22152. Front-stage gear transmission mechanism mounting cavity; 22153. Solid gear shaft mounting cavity; 22154. Rear-stage gear transmission mechanism mounting cavity; 22155. Crushing drum mounting cavity; 2218. Groove bottom surface; 222. Crushing mechanism; 2221. Crushing torque shaft; 2222. Front-stage gear transmission mechanism; 2223. Rear-stage gear transmission mechanism; 2224. Crushing drum shaft; 22241. Horizontal height line when the cutter tip rotates to the lowest point; 223. Electrical cavity;

[0028] 3. Cut the motor;

[0029] 5. Support shoe; 51. Support frame; 52. Locating pin; 53. Screw; 54. Slipper; 55. Side deflector;

[0030] 6. Guiding mechanism; 7. Traction mechanism; 8. Towing cable device;

[0031] 9. Conveyor; 91. Shovel plate; 95. Conveying trough. Detailed Implementation

[0032] This invention discloses a rear main body 22 (which may be simply referred to as the rear main body) of a thin coal seam short span coal mining machine, such as... Figures 1-5 As shown, the rear main body housing 221 extends horizontally in a strip shape. The front end face 2211 of the middle section of the rear main body housing has several positioning pin holes 2212 and bolt holes for mounting the front main body housing 21. When the front and rear main body housings are connected as a whole, they form a T-shaped body that is narrower at the front and wider at the rear. The front main body housing mainly serves as the suspension section of the machine body. The rocker arm 1 of the coal mining machine is hinged to the front main body housing with the cutting motor 3 as a pin. The rocker arm is located on the left and right sides of the front main body housing and in front of the rear main body housing. The conveying trough 95 of the conveyor 9 is located below the rear main body housing.

[0033] The left and right bottom surfaces of the rear main body shell are respectively provided with two loading cavities 2214. The loading cavity is a groove extending from front to back with the opening facing downwards. The front end of the loading cavity is open and the rear end is closed. The front end of the loading cavity in the left-right direction is located inside the center line of the upper drum of the rocker arm. The setting of the loading cavity is equivalent to adding an internal loading channel. The space between the loading cavity and the conveyor trough of the conveyor is part of the internal loading channel. The loading cavity can guide the coal flow entering the inner side of the drum center line into the conveyor trough of the conveyor, thereby significantly improving the coal loading effect.

[0034] The top surface of the loading cavity is divided into two sections, the front section 22141 is a horizontal surface, and the rear section 22142 is an inclined surface with a higher front and a lower rear. The coal flow entering the loading cavity will move downwardly and rearwardly after passing through a horizontal buffer zone, and then enter the conveying groove of the conveyor.

[0035] The middle part of the left and right direction rear body part shell is provided with an electrical cavity 223. The electrical cavity can be multiple and arranged at intervals. The electrical cavity can be used for installing an electrical box.

[0036] The rear body part shell can also be provided with two left and right crushing mechanism installation cavities 2215, and each crushing mechanism installation cavity can be provided with a set of crushing mechanism 222. The crushing mechanism can be used for timely crushing of large coal and rock between the rear body part shell and the conveying groove of the conveyor. The parts of the rear body part shell other than the loading cavity, the electrical cavity and the crushing mechanism installation cavity are basically solid structures, so that the gravity center of the whole machine is offset to the goaf side, which is beneficial to balance the weight of the swing arm of the coal mining machine and maintain good stability of the front and rear of the whole machine.

[0037] The left and right two support shoes 5 are installed in front of the rear body part shell, and the left and right two support shoes are preferably respectively close to the left and right ends of the rear body part shell. The support shoes are fixed on the rear body part shell, and the bottom surface of the support shoes is supported on the shovel plate 91 of the conveyor. The space outside the left and right two support shoes belongs to part of the outer loading channel, and the space in front of the loading cavity between the left and right two support shoes belongs to part of the inner loading channel. The support shoes can effectively separate the outer loading channel and the inner loading channel, can reduce the influence of the coal flow outside the center line of the drum on the coal flow inside when the coal mining machine moves, and then guide more coal flow from the outer loading channel outside the center line of the drum into the conveyor, which not only improves the overall coal loading effect, but also enables the crushing mechanism to crush more coal.

[0038] The support shoe can include a support frame 51, a positioning pin 52, a screw 53 and a shoe 54. The lower part of the support frame 51 is connected with the shoe. The upper part of the support frame 51 is positioned and connected with the rear body part shell through the positioning pin 52 and the screw 53.

[0039] The support shoe is also provided with two left and right side flow guide plates 55, and the side flow guide plates are vertically arranged, and the rear side surfaces of the two side flow guide plates are respectively directed to the left rear and the right rear. The two side flow guide plates can divide the coal into two parts to the left rear and the right rear of the drum, and finally make the coal enter the conveying groove of the conveyor from the inner and outer loading channels.

[0040] The left and right two crushing mechanism installation cavities are simultaneously provided with a crushing mechanism 222 or one of the left and right two crushing mechanism installation cavities is provided with a crushing mechanism 222, and the crushing mechanism preferably adopts the structure comprising crushing torque shafts 2221, front-stage gear transmission mechanisms 2222, rear-stage gear transmission mechanisms 2223 and crushing roller shafts 2224 which are sequentially transmission-connected. A plurality of cutter heads are fixedly arranged on the crushing roller shafts in parallel and are circumferentially fixed, and are used for crushing large coal rocks. The input end of the front-stage gear transmission mechanism adopts an elongated hollow gear shaft, the front end and the rear end of the hollow gear shaft are respectively provided with an external gear and an internal spline, the hollow gear shaft is coaxially sleeved on the crushing torque shaft, and the front end of the crushing torque shaft is exposed to the front of the hollow gear shaft. The front end of the crushing torque shaft is the power input end thereof, and the front end of the crushing torque shaft is provided with an external spline. The rear end of the crushing torque shaft is provided with an external spline, the rear end of the crushing torque shaft is spline-coupled with the rear end of the hollow gear shaft, and the other parts of the crushing torque shaft are not in contact with the hollow gear shaft. The input end of the rear-stage gear transmission mechanism adopts an elongated solid gear shaft, the front end and the rear end of the solid gear shaft are respectively provided with an external spline and an external gear, and the front end of the solid gear shaft is inserted into the core spline hole of the output end gear of the front-stage gear transmission mechanism and is spline-coupled therewith. The rear end of the crushing roller shaft is provided with an external spline, and the rear end of the crushing roller shaft is inserted into the core spline hole of the output end gear of the rear-stage gear transmission mechanism and is coaxially spline-coupled therewith. The crushing power is input from the front end of the crushing torque shaft, is transmitted to the hollow gear shaft at the rear end of the crushing torque shaft, is transmitted to the front end of the solid gear shaft through the front-stage gear transmission mechanism, is then transmitted to the rear end of the crushing roller shaft through the rear-stage gear transmission mechanism, and finally drives the crushing roller shaft and the cutter heads thereon to rotate, so that the large coal rocks are crushed.

[0041] The cutter head can comprise cutter teeth, a cutter head sleeve and a key, the cutter head sleeve is sleeved on the crushing roller shaft and is fixedly arranged through the key. A plurality of cutter teeth are fixedly arranged on the cutter head sleeve and can be fixedly welded or can be detachably fixed through fasteners. Each cutter tooth preferably adopts a combined cutter having a plurality of cutter tips. The plurality of cutter teeth are preferably uniformly distributed along the circumference on the cutter head sleeve. The horizontal height line 22241 of the cutter tip of the cutter head when rotating to the lowest point is lower than the bottom surface of the rear body part shell at the corresponding position, so that effective crushing is ensured.

[0042] One or more external meshing idlers can be arranged between the input end and the output end gears of the front-stage gear transmission mechanism, and a plurality of external meshing idlers are sequentially arranged between the input end and the output end gears of the rear-stage gear transmission mechanism.

[0043] Correspondingly, the crushing mechanism installation cavity can comprise a hollow gear shaft installation cavity 22151, a front-stage gear transmission mechanism installation cavity 22152, a solid gear shaft installation cavity 22153, a rear-stage gear transmission mechanism installation cavity 22154 and a crushing roller installation cavity 22155 which are sequentially communicated in sequence, and the crushing mechanism installation cavity as a whole has an S shape.

[0044] The hollow gear shaft, the front-stage gear transmission mechanism except the hollow gear shaft, the solid gear shaft, the rear-stage gear transmission mechanism except the solid gear shaft and the crushing roller shaft are respectively installed in the installation cavities.

[0045] The middle part of the bottom surface of the rear body part shell in the front-rear direction is set as a left-right extending groove, and the conveying groove 95 of the conveyor is vertically opposite to the groove. The front-stage gear transmission mechanism installation cavity is located at the front thick wall of the groove, and the rear-stage gear transmission mechanism installation cavity is located at the rear thick wall of the groove, so as to make full use of the space in front of and behind the conveying groove and reduce the influence on the conveying channel of the conveyor. The front ends of the crushing roller shaft, the solid gear shaft, the hollow gear shaft and the crushing torque shaft are respectively located in front of the groove, and the rear ends of the crushing roller shaft, the solid gear shaft, the hollow gear shaft and the crushing torque shaft are respectively located behind the groove.

[0046] For the case provided with the groove, the horizontal height line of the cutter tip of the cutter disc when rotating to the lowest point should be lower than the groove bottom surface 2218.

[0047] The front end surface of the rear body part shell is detachably installed with two support plates corresponding to the crushing mechanism installation cavities, the front bearings are arranged in the support plates on the same side of the crushing mechanism, the rear bearings are arranged in the crushing roller installation cavities, and the front and rear ends of the crushing roller shaft are respectively supported on the corresponding front and rear bearings. After the support plates are removed, the cutter teeth or the corresponding cutter discs of the crushing mechanism can be conveniently replaced.

[0048] The left and right crushing roller shaft installation cavities are preferably respectively close to the left and right ends of the rear body part shell. When the roller in front of the walking direction of the coal mining machine throws the large coal rock outward to the conveyor, the crushing mechanism on the same side of the roller will first contact and crush the part of the coal rock, thereby preventing the large coal rock from being stuck between the machine body and the conveying groove to hinder the walking of the coal mining machine, solving the problems of hard pulling of the conveyor scraper, broken chain of the crushing mechanism and traction of the coal mining machine, etc. When the coal mining machine walks back and forth to cut coal, the left and right crushing mechanisms respectively play a role, so that the large coal rock can be avoided from being stuck between the machine body and the conveying groove to hinder the normal work of the coal mining machine in the left and right directions.

[0049] The tow cable device 8 is installed at the middle position of the rear end surface of the rear body part shell, and the guide mechanism 6 and the traction mechanism 7 are installed at the left and right ends of the rear end surface. The guide grooves extending left and right are arranged on the guide mechanism, and the guide grooves are in left and right sliding fit with the guide rails on the conveyor. The tow cable device and the traction mechanism together provide chain traction and guide for the left and right walking of the rear body part relative to the conveyor.

[0050] Unless otherwise specified, the front and rear in this article respectively refer to the direction close to the coal wall and the direction away from the coal wall.

Claims

1. A rear main body of a short-span coal mining machine for thin coal seams, characterized in that: The rear main body housing extends horizontally in a strip shape. An electrical cavity is provided in the middle of the rear main body housing in the horizontal direction. Several positioning pin holes are provided on the front end face of the middle of the rear main body housing. Two loading cavities are provided on the bottom surfaces of the left and right parts of the rear main body housing, respectively. The loading cavity is a groove extending from front to back with the slot facing downward. The front end of the loading cavity is open and the rear end is closed. In the use state, the lower part of the rear main body is the conveying trough of the conveyor. The space between the loading cavity and the conveying trough of the conveyor is part of the internal loading channel.

2. The rear main body of the thin coal seam short span coal mining machine as described in claim 1, characterized in that: The top surface of the loading cavity is divided into two sections: the front section is a horizontal plane, and the rear section is a sloping plane that is higher in the front and lower in the rear.

3. The rear main body of the thin coal seam short span coal mining machine as described in claim 2, characterized in that: The rear main body housing has two crushing mechanism mounting cavities on the left and right sides. Except for the loading cavity, electrical cavity and crushing mechanism mounting cavity, the parts of the rear main body housing are solid structures.

4. The rear main body of the thin coal seam short span coal mining machine as described in claim 3, characterized in that: Two support slides are installed at the front of the rear main body shell, with the left and right support slides located near the left and right ends of the rear main body shell, respectively.

5. The rear main body of the thin coal seam short span coal mining machine as described in claim 4, characterized in that: The support shoe is equipped with two side guide plates, one on the left and one on the right. The side guide plates are both vertically arranged, and the rear sides of the two side guide plates face the left rear and the right rear, respectively.

6. The rear main body of the thin coal seam short span coal mining machine as described in claim 3, 4 or 5, characterized in that: Both left and right crushing mechanism mounting cavities may simultaneously house a crushing mechanism, or one of the left and right crushing mechanism mounting cavities may house a crushing mechanism. Each crushing mechanism includes a crushing torque shaft, a front-stage gear transmission mechanism, a rear-stage gear transmission mechanism, and a crushing drum shaft, which are sequentially connected. Multiple cutter discs are arranged side-by-side and circumferentially fixed on the crushing drum shaft. The input end of the front-stage gear transmission mechanism is a slender hollow gear shaft. The front and rear ends of the hollow gear shaft are respectively provided with external gears and internal splines. The hollow gear shaft is coaxially mounted on the crushing torque shaft, with the front end of the crushing torque shaft exposed in front of the hollow gear shaft. The front end of the crushing torque shaft is its power input end, and the rear end of the crushing torque shaft is splined to the rear end of the hollow gear shaft. Other parts of the crushing torque shaft do not contact the hollow gear shaft. The input end of the rear-stage gear transmission mechanism is a slender solid gear shaft. The front and rear ends of the solid gear shaft are splined. Each part is equipped with an external spline and an external gear. The front end of the solid gear shaft is inserted into the core spline hole of the output gear of the front-stage gear transmission mechanism and connected with its spline. The rear end of the crushing drum shaft is equipped with an external spline and is inserted into the core spline hole of the output gear of the rear-stage gear transmission mechanism and connected with its spline. The crushing mechanism mounting cavity includes a hollow gear shaft mounting cavity, a front-stage gear transmission mechanism mounting cavity, a solid gear shaft mounting cavity, a rear-stage gear transmission mechanism mounting cavity, and a crushing drum mounting cavity that are connected end to end. The crushing mechanism mounting cavity is generally S-shaped. The hollow gear shaft, the front-stage gear transmission mechanism (excluding the hollow gear shaft), the solid gear shaft, the rear-stage gear transmission mechanism (excluding the solid gear shaft), and the crushing drum shaft are respectively installed in the above mounting cavities. The left and right loading cavities are located between the left and right crushing drum mounting cavities and the solid gear shaft mounting cavity, respectively.

7. The rear main body of the thin coal seam short span coal mining machine as described in claim 6, characterized in that: A groove extending left and right is provided in the middle of the bottom surface of the rear main body housing in the front-rear direction. The mounting cavity of the front gear transmission mechanism is located in the front thick wall of the groove, and the mounting cavity of the rear gear transmission mechanism is located in the rear thick wall of the groove. The front ends of the crushing drum shaft, solid gear shaft, hollow gear shaft and crushing torque shaft are located in front of the groove, and the rear ends of the crushing drum shaft, solid gear shaft, hollow gear shaft and crushing torque shaft are located behind the groove.

8. The rear main body of the thin coal seam short span coal mining machine as described in claim 7, characterized in that: Two support plates, one on the left and one on the right, corresponding to the crushing mechanism mounting chambers, can be detachably installed on the front end face of the rear main body shell. The support plates on the same side as the crushing mechanism are equipped with front bearings, and the crushing drum mounting chamber is equipped with rear bearings. The front and rear ends of the crushing drum shaft are respectively supported on the corresponding front and rear bearings.

9. The rear main body of the thin coal seam short span coal mining machine as described in claim 6, characterized in that: The two crushing drum shaft mounting cavities are located near the left and right ends of the rear main body shell, respectively.

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