Thin seam compact type coal cutter swing arm shell

Abstract

The present application relates to a kind of thin coal seam compact type coal winning machine swing arm shell, its main body is the arm support extending left and right, arm support is the cavity structure for installing rear stage cutting transmission mechanism, two ends of arm support are respectively referred to as high-speed end and low-speed end, high-speed end and low-speed end are respectively provided with the input end gear mounting hole of rear stage cutting transmission mechanism and planetary mechanism mounting hole, middle part of arm support is provided with the connecting arm that suspends from arm support to front, connecting arm is provided with the front arm that suspends from connecting arm to left or right, the rear of high-speed end of arm support is provided with rear arm, rear arm is the cantilever structure that one end is connected in arm support, front arm and rear arm are respectively provided with front, rear hinged connection hole, front, rear hinged connection hole and input end gear mounting hole are coaxial, the lower part of connecting arm is provided with the semi-closed oil cylinder outer containing cavity, the front and rear cavity wall of oil cylinder outer containing cavity is all provided with the oil cylinder outer pin hole for hinged height-adjusting oil cylinder.The present application can provide larger mining range, shorten body, improve the problem of coal winning machine gravity center.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of coal winning machine swing arm shell, especially suitable for thin coal seam coal winning machine, help to expand the scope of mining and shorten machine body. BACKGROUND

[0002] On the existing thin coal seam coal winning machine, cutting motor is usually located on swing arm, and swings with swing arm. When the rear swing arm of the travel direction of this thin coal seam suspension machine body coal winning machine is on the knife, the problem of the rear drum mining height is too small will appear, because when mining height increases, the rear swing arm cutting motor will interfere with the upper coal table left by the front drum cutting bottom knife, therefore the overall mining height of this coal winning machine is too narrow, cannot adapt to the mining requirement of the large thickness variation of thin coal seam working face in our country.

[0003] In view of the above problems, the industry has proposed that the cutting part is a swing part and a fixed part, and the main part of the cutting motor and the cutting transmission mechanism is arranged in the fixed part, which leads to the structure of the fixed part being too complex, the length of the machine body suspension section being too long, the weight being too large, and the gravity center of the whole machine still having a great influence on the stress of the whole machine. Moreover, the structure of the driving oil cylinder of the swing arm arranged on the left or right side of the cutting motor on the machine body makes the machine body too long, and the long machine body structure cannot perform the straight pushing-in knife process similar to the shortwall coal winning machine, and the time of two-end oblique cutting-in knife is long, which has certain restriction on the mining efficiency. SUMMARY

[0004] The present application aims to provide a thin coal seam compact coal winning machine swing arm shell, which can provide a larger mining range, shorten the machine body and improve the gravity center problem of the coal winning machine.

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

[0006] A thin coal seam compact coal winning machine swing arm shell, the main body of which is an arm support extending left and right, the arm support is a cavity structure for mounting a rear cutting transmission mechanism, the two ends of the arm support are respectively referred to as high-speed end and low-speed end, the high-speed end and the low-speed end are respectively provided with an input end gear mounting hole and a planetary mechanism mounting hole of the rear cutting transmission mechanism, a connecting arm extending forward from the arm support is arranged in the middle of the arm support, a front arm extending left or right from the connecting arm is arranged on the connecting arm, a rear arm is arranged behind the high-speed end of the arm support, the rear arm is a cantilever structure connected to the arm support at one end, a front hinge connection hole and a rear hinge connection hole are respectively arranged on the front arm and the rear arm, the front hinge connection hole, the rear hinge connection hole and the input end gear mounting hole are coaxial, a semi-closed oil cylinder outer containing cavity is arranged on the lower part of the connecting arm, an oil cylinder outer pin hole for hinge height adjustment oil cylinder is arranged on the front and rear cavity walls of the oil cylinder outer containing cavity, and the axis of the oil cylinder outer pin hole extends forward and backward.

[0007] The left and right width of the middle and upper part of the connecting arm is the narrowest, and the left and right width is wider closer to the upper and lower ends, the top surface of the connecting arm is inclined, and the top surface of the connecting arm closer to the high-speed end of the arm support in the left and right direction is higher.

[0008] The root of the arm support near the rear arm is provided with a rear protruding bump structure, and the internal cavity of the bump structure is an auxiliary cavity which is part of the internal cavity of the arm support.

[0009] The connecting arm is provided with an internal cavity which is communicated with the internal cavity of the arm support, and the internal cavity of the connecting arm is provided with a reinforced cooler.

[0010] The overhanging end outer surface of the front arm, the high-speed end outer surface of the arm support and the overhanging end outer surface of the rear arm are provided as a first group of convex circular cylindrical surfaces coaxial with the front hinge connecting hole.

[0011] The side surface of the connecting arm near the high-speed end of the arm support in the left and right direction is provided as a second group of concave circular cylindrical surfaces coaxial with the front hinge connecting hole.

[0012] A window is arranged on the front cavity wall of the oil cylinder external containing cavity.

[0013] The low-speed end of the arm support is bent downward relative to other parts of the arm support, and the low-speed end outer surface of the arm support, the lower surface of the middle part of the arm support in the left and right direction and the side surface of the connecting arm near the low-speed end of the arm support in the left and right direction form a semi-closed coal loading channel with an open lower part.

[0014] The rear part of the lower surface of the middle part of the arm support in the left and right direction is a front-low and rear-high inclined surface.

[0015] The side surface of the connecting arm near the low-speed end of the arm support in the left and right direction is provided as a concave circular cylindrical surface coaxial with the planetary mechanism mounting hole.

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

[0017] The high-speed end of the arm support is the connection point of the power transmission from the front-stage cutting transmission mechanism to the rear-stage cutting transmission mechanism, the arm support is hingedly connected to the machine body at two places through the front arm and the rear arm, and the two hinged connection points are arranged in front of and behind the power transmission connection point, respectively, and the radial displacement of the two hinged connection points due to wear has less influence on the power transmission connection point located therebetween, so that the influence on the transmission accuracy can be reduced.

[0018] The outer surface of the overhanging end of the forearm, the outer surface of the high-speed end of the arm support and the outer surface of the overhanging end of the rear arm are all set as the first group of convex circular cylindrical surfaces coaxial with the front hinged connection hole, while the side of the connecting arm close to the high-speed end of the arm support in the left-right direction is set as the second group of concave circular cylindrical surfaces coaxial with the front hinged connection hole. The corresponding structural surfaces of the body forming the hinge with the swing arm shell are set as the first group of concave circular cylindrical surfaces and the second group of convex circular cylindrical surfaces coaxial with the front hinged connection hole, and the gap between the two coaxial circular cylindrical surfaces arranged in pairs is controlled within a suitable range, so that the accumulation of coal and rock into the swing arm shell and the body during the up-down swing of the swing arm shell can be effectively controlled, and the smooth swing can be ensured.

[0019] By setting the protruding structure on the arm support, the connection strength of the rear arm and the arm support is improved, and the oil storage volume of the oil cavity of the arm support is also increased.

[0020] By setting the reinforced cooler in the inner cavity of the connecting arm, the oil cavity is reinforced, and the cooling effect of the high-power density swing arm is improved.

[0021] The low-speed end of the arm support is bent downward relative to other parts of the arm support, forming a semi-closed coal loading channel with an open bottom, which is equivalent to adding an internal loading channel on the inside of the drum center line, and can guide the coal flow on the inside of the drum into the conveying groove of the rear conveyor, thereby improving the coal loading effect.

[0022] By setting a semi-closed oil cylinder outer containing cavity in the lower part of the connecting arm, the oil cylinder containing cavity is combined with the oil cylinder containing cavity set in the front lower part of the body to form an oil cylinder containing cavity, which can provide sufficient space for the swing of the height-adjusting oil cylinder and the accommodation of certain coal and the layout of pipelines.

[0023] The height-adjusting oil cylinder is arranged below the swing arm shell, further reducing the space occupation in the left-right direction, which provides a guarantee for realizing the compact structure of the short body of the coal mining machine. Due to the shortening of the left and right lengths of the suspended body section, the center of gravity of the whole machine can be shifted backward, improving the stress stability of the whole machine. Moreover, the shortening of the body makes it convenient for the coal mining machine to perform a straight pushing cutter process similar to a short-wall coal mining machine, thereby improving the mining efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a front view of an embodiment of the swing arm shell of the present application;

[0025] Figure 2 It is a top view of an embodiment of the swing arm shell of the present application;

[0026] Figure 3 It is an A-A sectional view of Figure 2 ;

[0027] Figure 4 It is a structural schematic view of the coal loading channel.

[0028] Reference signs:

[0029] 11. swing arm housing; 111. front arm; 1111. outer surface of the overhanging end of the front arm; 112. rear arm; 1121. outer surface of the overhanging end of the rear arm; 113. high speed end of the arm support; 1131. outer surface of the high speed end of the arm support; 114. connecting arm; 1140. window; 1141. side close to the high speed end of the arm support; 1142. side close to the low speed end of the arm support; 1143. inner cavity of the connecting arm; 1144. outer cylinder containing cavity of the connecting arm; 1145. outer cylinder pin hole of the connecting arm; 1146. concave circular cylindrical surface; 115. raised structure; 1151. auxiliary cavity; 1153. rear part of the lower surface of the middle part of the arm support; 116. arm support; 1161. outer surface of the low speed end of the arm support; 1162. front part of the lower surface of the middle part of the arm support. DETAILED DESCRIPTION

[0030] The application discloses a swing arm housing 11 (which can be simply referred to as a swing arm housing) of a compact coal mining machine for thin coal seams, as shown in the figure. Figures 1-4 The main body of the swing arm housing is an arm support 116 extending left and right, and the arm support is a cavity structure for mounting a rear-stage cutting transmission mechanism. The two ends of the arm support are respectively referred to as a high speed end 113 and a low speed end, and the high speed end and the low speed end are respectively provided with an input gear mounting hole and a planetary mechanism mounting hole of the rear-stage cutting transmission mechanism. A connecting arm 114 is provided in the middle part of the arm support and overhangs forward from the arm support, and a front arm 111 is provided on the connecting arm and overhangs left or right from the connecting arm, that is, for the right swing arm housing of the coal mining machine, the front arm overhangs left from the connecting arm, and for the left swing arm housing of the coal mining machine, the front arm overhangs right from the connecting arm.

[0031] The low speed end of the arm support is used for mounting a planetary reduction mechanism and a drum, the drum is coaxially sleeved and mounted outside the planetary reduction mechanism, a sun gear of the planetary reduction mechanism is coaxially splined connected with an output gear of the rear-stage cutting transmission mechanism, and a planetary carrier of the planetary reduction mechanism is fixedly connected with a connecting sleeve of the drum in a coaxial mode.

[0032] A rear arm 112 is provided rearward of the high speed end of the arm support, and the rear arm is a cantilever structure connected to the arm support at one end. A front hinged connection hole and a rear hinged connection hole for mounting a hinged pin are respectively provided on the front arm and the rear arm, and the front hinged connection hole, the rear hinged connection hole and the input gear mounting hole are coaxial. The front arm and the rear arm form front and rear hinged connection points with the machine body of the coal mining machine through the front and rear hinged connection holes.

[0033] A semi-closed outer cylinder containing cavity 1144 of a hinged height-adjusting oil cylinder is provided on the lower part of the connecting arm, outer cylinder pin holes 1145 of the hinged height-adjusting oil cylinder are provided on the front and rear cavity walls of the outer cylinder containing cavity, and the axes of the outer cylinder pin holes extend forward and rearward.

[0034] The outer hole of the oil cylinder is close to the low speed end of the arm support, and the inner surface of the outer accommodating cavity of the oil cylinder close to the low speed end of the arm support is arranged as a concave circular cylindrical surface 1146 coaxial with the outer hole of the oil cylinder. In the installed state, the corresponding end of the height-adjusting oil cylinder and the concave circular cylindrical surface 1146 form a gap with equal width, which is narrow enough to neither affect the swing of the height-adjusting oil cylinder nor cause the coal powder to enter and block.

[0035] The left and right width of the middle and upper part of the connecting arm is the narrowest, and the closer to the upper and lower ends, the wider the left and right width, especially the lower part, which is used to set the outer accommodating cavity of the oil cylinder, and the whole connecting arm forms a flat and thin structure. The narrowest left and right width is preferably the same height as the front hinge connecting hole. The top surface of the connecting arm is a slope, and the closer to the high speed end of the arm support, the higher the top surface of the connecting arm in the left and right direction. The flat and thin structure of the connecting arm and the special slope structure make the upper swing arm shell have little effect on the upper coal table when it swings up and down, so a large mining range can be ensured.

[0036] The root of the arm support close to the rear arm is preferably provided with a protruding structure 115, which improves the connection strength of the rear arm and the arm support. The internal cavity of the protruding structure is an auxiliary cavity 1151, which is part of the inner cavity of the arm support, and increases the oil storage volume of the oil cavity of the arm support.

[0037] The connecting arm is provided with an inner cavity 1143, which is communicated with the inner cavity of the arm support, and increases the oil storage volume in the swing arm shell. The inner cavity of the connecting arm is provided with a reinforced cooler for reinforcing the cooling of the oil cavity to improve the cooling effect of the high-power density swing arm. A plurality of cooling pipes can be arranged in the reinforced cooler, and the plurality of cooling pipes can be connected in series or parallel.

[0038] The outer surface 1111 of the overhanging end of the front arm, the outer surface 1131 of the high speed end of the arm support and the outer surface 1121 of the overhanging end of the rear arm are arranged as a first group of convex circular cylindrical surfaces coaxial with the front hinge connecting hole, and the corresponding positions of the machine body for hinge connection with the swing arm shell are arranged as a first group of concave circular cylindrical surfaces coaxial with the hinge axes of the front and rear hinge connections. The first group of concave circular cylindrical surfaces and the first group of convex circular cylindrical surfaces correspond to each other and are spaced from each other, on the one hand, without affecting the free swing of the swing arm, and on the other hand, as long as the size of the gap is reasonably controlled, the coal and rock accumulation into the swing arm shell and the machine body can be effectively controlled, and the smooth swing can be ensured.

[0039] Similarly, the side surface 1141 of the connecting arm close to the high speed end of the arm support in the left and right direction is arranged as a second group of concave circular cylindrical surfaces coaxial with the front hinge connecting hole. Correspondingly, the overhanging end outer surface of the ear seat of the machine body for hinge connection with the swing arm is arranged as a second group of convex circular cylindrical surfaces coaxial with the front hinge connecting hole, and the surface and the side surface of the connecting arm close to the high speed end of the arm support are spaced from each other.

[0040] A window 1140 is formed in the front side cavity wall of the oil cylinder outer cavity to facilitate the maintenance of the height-adjustable oil cylinder.

[0041] The low-speed end of the arm support is bent downward relative to other parts of the arm support, and the outer surface 1161 of the low-speed end of the arm support, the lower surface of the middle part of the arm support in the left-right direction, and the side surface 1142 of the connecting arm close to the low-speed end of the arm support form a semi-closed coal loading channel with an open lower end.

[0042] The front part 1162 of the lower surface of the middle part of the arm support in the left-right direction is a horizontal surface, and the rear part 1153 is a front-low and rear-high inclined surface.

[0043] The side surface 1142 of the connecting arm close to the low-speed end of the arm support is preferably an inner concave circular arc cylindrical surface coaxial with the planetary mechanism mounting hole, which can maintain equal spacing and a certain gap with the drum blades to improve the loading effect of the drum screw conveyor.

[0044] Unless specifically specified, the front and back directions herein refer to the direction close to the coal wall and the direction away from the coal wall, respectively.

Claims

1. A thin-seam compact miner swing arm housing characterized by: The main body is a left and right extending arm support, the arm support is a cavity structure for mounting a rear stage cutting transmission mechanism, two ends of the arm support are respectively referred to as a high speed end and a low speed end, the high speed end and the low speed end are respectively provided with an input gear mounting hole and a planetary mechanism mounting hole of the rear stage cutting transmission mechanism, a connecting arm is provided in the middle of the arm support and suspends forward from the arm support, a front arm is provided on the connecting arm and suspends leftward or rightward from the connecting arm, a rear arm is provided behind the high speed end of the arm support and is a cantilever structure with one end connected to the arm support, a front hinged connection hole and a rear hinged connection hole are respectively provided on the front arm and the rear arm, the front hinged connection hole, the rear hinged connection hole and the input gear mounting hole are coaxial, a semi-closed oil cylinder outer containing cavity is provided at the lower part of the connecting arm and is combined with an oil cylinder inner containing cavity provided at the front lower part of the machine body to form an oil cylinder containing cavity, an oil cylinder outer pin hole for hinging a height adjusting oil cylinder is provided on the front and rear cavity walls of the oil cylinder outer containing cavity, the axis of the oil cylinder outer pin hole extends forward and backward, the oil cylinder outer pin hole is close to the low speed end of the arm support in the left and right direction, the inner surface of the oil cylinder outer containing cavity close to the low speed end of the arm support is provided as an inner concave circular arc cylindrical surface coaxial with the oil cylinder outer pin hole, the connecting arm extends downward beyond the bottom surface of the middle part of the arm support, the left and right width of the middle upper part of the connecting arm is the narrowest, the left and right width becomes wider as it is closer to the upper and lower ends, the lower part is wider for providing the oil cylinder outer containing cavity, the top surface of the connecting arm is an inclined surface, the top surface of the connecting arm is higher as it is closer to one end of the high speed end of the arm support in the left and right direction.

2. The thin-seam compact miner swing arm housing of claim 1, wherein: A raised structure protruding rearward is provided at the position close to the root of the rear arm of the arm support, the internal cavity of the raised structure is an auxiliary cavity which is part of the internal cavity of the arm support.

3. The thin-seam compact miner swing arm housing of claim 1, wherein: The connecting arm is provided with an internal cavity which is communicated with the internal cavity of the arm support, and a reinforced cooler is arranged in the internal cavity of the connecting arm.

4. The thin-seam compact miner swing arm housing of claim 1, wherein: The outer surface of the suspending end of the front arm, the outer surface of the high speed end of the arm support and the outer surface of the suspending end of the rear arm are provided as a first group of outer convex circular arc cylindrical surfaces coaxial with the front hinged connection hole.

5. A thin-seam compact miner swing arm housing as claimed in claim 4, characterized in that: The side surface of the connecting arm close to the high speed end of the arm support in the left and right direction is provided as a second group of inner concave circular arc cylindrical surfaces coaxial with the front hinged connection hole.

6. A thin-seam compact miner swing arm housing as claimed in claim 1, 2, 3, 4 or 5, characterized in that: A window is provided on the front side cavity wall of the oil cylinder outer containing cavity.

7. A thin-seam compact miner swing arm housing as claimed in claim 1, 2, 3, 4 or 5, characterized by: The low speed end of the arm support is bent downward relative to other parts of the arm support, the outer surface of the low speed end of the arm support, the lower surface of the middle part of the arm support in the left and right direction and the side surface of the connecting arm close to the low speed end of the arm support in the left and right direction enclose a semi-closed coal loading channel with an open lower part.

8. The thin-seam compact miner swing arm housing of claim 7, wherein: The rear part of the lower surface of the middle part of the arm support in the left and right direction is an inclined surface with a front low and rear high.

9. The thin-seam compact miner swing arm housing of claim 8, wherein: The side surface of the connecting arm close to the low speed end of the arm support in the left and right direction is provided as an inner concave circular arc cylindrical surface coaxial with the planetary mechanism mounting hole.

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