Thin seam coal cutter oscillating arm housing

Abstract

The present application relates to a kind of thin coal seam coal cutter swing arm shell, its main body is the arm support extending left and right, arm support is equipped with the transmission cavity for installing cutting transmission mechanism, the both ends of transmission cavity are set to input end gear mounting hole and output end gear mounting hole, input end gear mounting hole and output end gear mounting hole the end where is respectively called the high-speed end and low-speed end of arm support, arm support middle part is equipped with the connecting arm that suspends from arm support to forward, connecting arm is equipped with the front arm and rear arm that suspend from connecting arm to left or right, front arm, rear arm and the high-speed end of arm support are sequentially spaced from front to back, front arm and rear arm are respectively equipped with front pin shaft mounting hole and rear pin shaft mounting hole for being installed in for cutting motor to act as pin shaft, front pin shaft mounting hole and rear pin shaft mounting hole are coaxial with input end gear mounting hole.The present application can provide larger mining range, also help to shorten machine body, improve coal cutter gravity problem.

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 provide larger mining range for thin coal seam coal winning machine and shorten the body of coal winning machine. 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 body coal winning machine is equipped with a knife, the problem of small rear drum mining height 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, and it cannot adapt to the mining requirements of large thickness variation of thin coal seam working face.

[0003] In view of the above problems, the industry has proposed to divide the cutting part into a swing part and a fixed part, and to set the cutting motor and the main part of the cutting transmission system in the fixed part, resulting in a too complex structure of the fixed part, a longer length and a larger weight of the left and right suspension sections of the machine body, and the center of gravity of the whole machine still has a great influence on the stress of the whole machine. Moreover, the long machine body structure of the coal winning machine 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 longer, which has certain restriction on the mining efficiency. SUMMARY

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

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

[0006] A kind of thin coal seam coal winning machine swing arm shell, the main body of which is an arm support extending left and right, a transmission cavity for installing cutting transmission mechanism is arranged in the arm support, the two ends of the transmission cavity are provided with input end gear mounting hole and output end gear mounting hole respectively, the end where the input end gear mounting hole and the output end gear mounting hole are located is called high-speed end and low-speed end of the arm support respectively, a connecting arm is arranged in the middle of the arm support and suspends forward from the arm support, a front arm and a rear arm are arranged on the connecting arm and suspend left or right from the connecting arm, the front arm, the rear arm and the high-speed end of the arm support are arranged in sequence from front to back, a front pin shaft mounting hole and a rear pin shaft mounting hole are arranged on the front arm and the rear arm respectively for installing cutting motor as pin shaft, and the front pin shaft mounting hole and the rear pin shaft mounting hole are coaxial with the input end gear mounting hole.

[0007] The connecting arm is a flat and thin structure with smaller left and right width than upper and lower height, and the top surface of the connecting arm is inclined, 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 directions.

[0008] The connecting arm is provided with an inner cavity, the inner cavity of the connecting arm communicates with the inner cavity of the arm support, and a plurality of mounting positions of the reinforced cooler are arranged in the inner cavity of the connecting arm in parallel from top to bottom, and each mounting position of the reinforced cooler comprises two mounting holes arranged in front and back.

[0009] The middle part of the arm support can be provided with a rear protruding bump structure, and the inner cavity of the bump structure is an auxiliary cavity which is part of the inner cavity of the arm support.

[0010] The outer surface of the overhanging end of the front arm and the outer surface of the overhanging end of the rear arm are preferably arranged as an outer convex circular arc cylindrical surface coaxial with the front pin shaft mounting hole, and the side surface of the connecting arm close to the high-speed end of the arm support is arranged as an inner concave circular arc cylindrical surface coaxial with the front pin shaft mounting hole.

[0011] The outer surface of the high-speed end of the arm support is preferably arranged as an outer convex circular arc cylindrical surface coaxial with the input end gear mounting hole.

[0012] The side surface of the connecting arm close to the low-speed end of the arm support is preferably arranged as an inner concave circular arc cylindrical surface coaxial with the output end gear mounting hole.

[0013] A set of joint bearings are respectively arranged in the front pin shaft mounting hole and the rear pin shaft mounting hole, and the outer rings of the joint bearings are fixed relative to the front pin shaft mounting hole and the rear pin shaft mounting hole.

[0014] The low-speed end of the arm support is inclined and bent downward relative to other parts of the arm support, and an arch-shaped structure with an upwardly gathered bottom surface is formed at the middle part of the arm support in the left-right direction and close to the low-speed end of the arm support, and a hole surrounded by the arch-shaped structure is a loading channel.

[0015] A set of joint bearings are respectively arranged in the front pin shaft mounting hole and the rear pin shaft mounting hole, and the outer rings of the joint bearings are fixed relative to the front pin shaft mounting hole and the rear pin shaft mounting hole, and the low-speed end of the arm support is inclined and bent downward relative to other parts of the arm support, and an arch-shaped structure with an upwardly gathered bottom surface is formed at the middle part of the arm support in the left-right direction and close to the low-speed end of the arm support, and a hole surrounded by the arch-shaped structure is a loading channel.

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

[0017] The swing arm shell can be connected with the machine body of the coal mining machine by using the cutting motor as a pin shaft, which shortens the left-right length of the machine body of the coal mining machine and simplifies the structure of the cutting mechanism.

[0018] The specific structure design that the high-speed end of the arm support, the front arm and the rear arm are sequentially and spaced arranged from front to back is adopted, the front arm and the rear arm are stress positions, and the high-speed end of the arm support is a non-stress position, the stress position and the non-stress position are separated, the transmission part located in the arm support is in a good non-stress state, and therefore the transmission precision is improved.

[0019] The overhanging end outer surface of the front arm, the overhanging end outer surface of the rear arm and the high-speed end outer surface of the arm support are all arranged as convex circular arc cylindrical surfaces coaxial with the front pin shaft mounting hole, and when the corresponding edge of the shearer body is arranged as a concave circular arc cylindrical surface coaxial with the front pin shaft mounting hole, the gap between the convex circular arc cylindrical surface and the corresponding concave circular arc cylindrical surface is controlled within a proper range, so that the coal and rock accumulation between the swing arm shell and the shearer body can be effectively controlled during the rotation of the swing arm shell relative to the shearer body.

[0020] The side surface of the connecting arm near the low-speed end of the arm support is arranged as a concave circular arc cylindrical surface coaxial with the output end gear mounting hole, and the overhanging end outer surface of the corresponding lug seat on the shearer body can be arranged as a convex circular arc cylindrical surface coaxial with the front pin shaft mounting hole, and the gap between the concave circular arc cylindrical surface and the corresponding convex circular arc cylindrical surface is controlled within a proper range, so that the coal and rock accumulation between the swing arm shell and the shearer body can be effectively controlled during the rotation of the swing arm shell relative to the shearer body.

[0021] The joint bearing is installed in the pin shaft mounting hole of the front arm and the rear arm, and the cutting motor is supported by the joint bearing, so that the concentricity between the front and rear pin shaft mounting holes and the shell of the cutting motor can be maintained, and the transmission precision between the cutting motor and the cutting transmission mechanism is improved.

[0022] The arrangement of the auxiliary cavity not only increases the oil cavity of the arm support, but also increases the strength of the shell of the arm support.

[0023] The connecting arm is also provided with an inner cavity, and the inner cavity of the connecting arm is communicated with the inner cavity of the arm support, so that the oil storage volume in the swing arm shell is increased. Furthermore, a plurality of reinforced cooler mounting positions are arranged in the inner cavity of the connecting arm, and a plurality of reinforced coolers connected in series are installed in the reinforced cooler mounting positions, so that the reinforced cooling oil cavity is formed, and the cooling effect of the high-power density swing arm is improved.

[0024] The side surface of the connecting arm near the low-speed end of the arm support is arranged as a concave circular arc cylindrical surface coaxial with the output end gear mounting hole, the drum is installed at the low-speed end of the arm support, and a certain gap is maintained between the concave circular arc cylindrical surface and the drum blade, so that the loading effect of the drum screw conveyor is improved.

[0025] The arm support is partially arranged as an upwardly gathered arch structure, a loading channel is formed, the path of the coal and rock into the conveyor is increased, the coal and rock are beneficially shunted, and the loading effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a front view of an embodiment of the swing arm shell;

[0027] Figure 2 is a front view of an embodiment of the swing arm shell; Figure 1 is a top view of an embodiment of the swing arm shell;

[0028] Figure 3 is an A-A sectional view of Figure 2

[0029] Figure 4 is a B-B sectional view of Figure 2

[0030] Figure 5 is a partial enlarged view of the coal loading passage.

[0031] Reference signs:

[0032] 11. swing arm housing; 111. front arm; 1110. oil cylinder articulation seat; 1111. outer surface of the overhanging end of the front arm; 1112. front pin shaft mounting hole; 1113. front end face of the front arm; 1114. rear end face of the front arm; 112. rear arm; 1121. outer surface of the overhanging end of the rear arm; 1122. rear pin shaft mounting hole; 1123. front end face of the rear arm; 1124. rear end face of the rear arm; 113. arm bracket; 1131. outer surface of the high speed end of the arm bracket; 1132. input end gear mounting hole; 114. connecting arm; 1141. side surface close to the high speed end of the arm bracket; 1142. side surface close to the low speed end of the arm bracket; 1143. inner cavity of the connecting arm; 1144. mounting hole; 1145. cooling water outlet; 1146. communication hole; 115. auxiliary cavity; 116. loading passage; 1161. outer convex circular arc cylindrical surface; 1162. bottom surface of the arch; 1163. outer convex circular arc cylindrical surface. DETAILED DESCRIPTION

[0033] The present application discloses a swing arm housing 11 (may be simply referred to as swing arm housing) of a thin seam coal mining machine, as shown in Figures 1-5 ​​As shown, the main body of the arm support 113 is a left and right extending arm support, and a transmission cavity for mounting the cutting transmission mechanism is arranged in the arm support. The two ends of the transmission cavity are respectively provided with an input end gear mounting hole 1132 and an output end gear mounting hole. The cutting transmission mechanism adopts a fixed shaft gear transmission mechanism. In order to distinguish the two ends of the arm support, the input end gear mounting hole and the output end gear mounting hole are respectively referred to as the high speed end and the low speed end of the arm support. The input end gear mounting hole and the output end gear mounting hole are respectively used for mounting the input end gear and the output end gear of the cutting transmission mechanism. The middle part of the arm support is provided with a connecting arm 114 which is suspended forward from the arm support. The connecting arm is provided with a front arm 111 and a rear arm 112 which are suspended leftward or rightward from the connecting arm. The front arm, the rear arm and the high speed end of the arm support are arranged in sequence from front to back and are parallel to each other. For the right oscillating arm shell of the coal mining machine, the front arm and the rear arm are suspended leftward from the connecting arm. For the left oscillating arm shell of the coal mining machine, the front arm and the rear arm are suspended rightward from the connecting arm. The front arm and the rear arm are respectively provided with a front pin shaft mounting hole 1112 and a rear pin shaft mounting hole 1122 for mounting the cutting motor as a pin shaft. The front pin shaft mounting hole and the rear pin shaft mounting hole are coaxial with the input end gear mounting hole, so as to ensure that the cutting motor is coaxial with the input end gear after installation and transmits power. The oscillating arm shell can be connected with the body of the coal mining machine through the front arm, the rear arm and the cutting motor, which not only shortens the left and right lengths of the suspended body of the coal mining machine, but also simplifies the structure of the cutting mechanism.

[0034] The connecting arm is a flat and thin structure with a left and right width smaller than an upper and lower height. The top surface of the connecting arm is inclined, 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 directions. The connecting arm with the above structure has little effect on the coal table above during the up and down oscillation of the oscillating arm shell, so that the mining range of the whole oscillating arm can be large.

[0035] The connecting arm is provided with an inner cavity, and the inner cavity 1143 of the connecting arm is communicated with the inner cavity of the arm support. The inner cavity of the connecting arm increases the oil storage volume in the oscillating arm shell. A plurality of mounting positions of the reinforced coolers are arranged in the inner cavity of the connecting arm in an upper and lower parallel manner. Each mounting position of the reinforced coolers includes two mounting holes 1144 in front and back. By connecting a plurality of reinforced coolers in series, the cooling length is increased, the narrow oil pool can be reinforced and cooled, and the cooling effect of the high power density oscillating arm is improved. The shell wall of the connecting arm is provided with a communication hole 1146 and a cooling water outlet 1145. The communication hole is used for communicating the inner cavities of the arm support and the connecting arm. The outlet of the last reinforced cooler in series is connected with the cooling water outlet 1145.

[0036] The middle part of the arm support is provided with a protruding structure which protrudes rearward. The inner cavity of the protruding structure is an auxiliary cavity 115 which is part of the inner cavity of the arm support. The auxiliary cavity not only increases the oil cavity of the arm support, but also increases the shell strength of the arm support.

[0037] The overhanging end outer surface 1111 of the front arm, the overhanging end outer surface 1121 of the rear arm and the high speed end outer surface 1131 of the arm support are all set as convex circular cylindrical surfaces coaxial with the front pin shaft mounting hole. The corresponding edges of the shearer body can be set as concave circular cylindrical surfaces coaxial with the front pin shaft mounting hole. By controlling the gap width between the convex circular cylindrical surface and the corresponding concave circular cylindrical surface within a proper range, the coal and rock accumulation between the swing arm shell and the shearer body can be effectively controlled during the rotation of the swing arm shell relative to the shearer body.

[0038] Similarly, the side surface 1141 of the connecting arm near the high speed end of the arm support is set as a concave circular cylindrical surface coaxial with the front pin shaft mounting hole. The overhanging end outer surface of the corresponding lug seat on the shearer body can be set as a convex circular cylindrical surface coaxial with the front pin shaft mounting hole. By controlling the gap width between the concave circular cylindrical surface and the corresponding convex circular cylindrical surface within a proper range, the coal and rock accumulation between the swing arm shell and the shearer body can also be effectively controlled during the rotation of the swing arm shell relative to the shearer body.

[0039] The high speed end outer surface 1131 of the arm support is also set as a convex circular cylindrical surface coaxial with the input end gear mounting hole. The corresponding edge position on the shearer body is also set as a concave circular cylindrical surface. The convex circular cylindrical surface and the concave circular cylindrical surface are kept apart.

[0040] The side surface 1142 of the connecting arm near the low speed end of the arm support is preferably set as a concave circular cylindrical surface coaxial with the output end gear mounting hole. The concave circular cylindrical surface can keep a certain gap with the drum blade, improving the loading effect of the drum screw conveyor.

[0041] An oil cylinder hinging seat 1110 can also be set on the overhanging end of the front arm for installing a height adjusting oil cylinder between the swing arm shell and the shearer body. The extension and retraction of the height adjusting oil cylinder can drive the swing arm shell to swing up and down.

[0042] The external load force received by the drum is transmitted to the shearer body through the connecting arm, the front arm and the rear arm. The front arm and the rear arm are force receiving parts, and the high speed end of the arm support is a non-force receiving part. The force receiving parts and the non-force receiving part are separated, which can ensure that the transmission part located in the arm support is in a good non-force receiving state, thus helping to improve the transmission accuracy.

[0043] The front end surface 1113 of the front arm, the rear end surface 1114 of the front arm, the front end surface 1123 of the rear arm and the rear end surface 1124 of the rear arm are planes perpendicular to the axis of the front pin shaft mounting hole. These planes correspond to the corresponding end planes of the three lug seats extending in the left-right direction on the shearer body, for realizing the axial limiting of the swing arm shell relative to the shearer body. The front and rear end surfaces 1113 and 1114 of the front arm also simultaneously serve to close the oil cylinder mounting cavity.

[0044] A set of bearings can be installed in the front pin shaft mounting hole and the rear pin shaft mounting hole respectively, the outer ring of the bearings is fixed relative to the front pin shaft mounting hole and the rear pin shaft mounting hole, for example, a tight fit can be used, or a key connection can be used. The bearings are used to support the cutting motor, so that the front arm and the rear arm can rotate relative to the cutting motor. The load at the hinge is mostly borne by the bearings, which can well protect the swing arm shell, the fuselage shell and the cutting motor from being affected or less affected, and maintain the connection reliability.

[0045] The bearings are preferably knuckle bearings, which have large load capacity, impact resistance, corrosion resistance, wear resistance and self-aligning. The use of knuckle bearings helps to maintain the concentricity between the front pin shaft mounting hole and the rear pin shaft mounting hole and the outer shell of the cutting motor.

[0046] The low-speed end of the boom is inclined downward relative to other parts of the boom, and an arch-shaped structure with the bottom surface drawn upward is formed at the middle of the boom in the left-right direction and close to the low-speed end of the boom, the arch-shaped structure encloses a semi-closed opening, the inner side of the opening includes the bottom surface 1162 of the vault, two outer convex circular arc cylindrical surfaces 1161 and 1163 located on the left and right sides of the vault, and the outer convex circular arc cylindrical surface 1161 is arranged on the outer surface of the low-speed end of the boom. The inner side of the opening and the side surface 1142 close to the low-speed end of the boom on the connecting arm enclose a loading channel. The loading channel increases the path of coal and rock into the conveyor, which is beneficial to the diversion of coal and rock, thereby improving the loading effect. The side surface 1142 close to the low-speed end of the boom is preferably coaxial with the output end gear.

[0047] Unless specifically specified, the front and the rear in this article refer to the direction close to the coal wall and the direction away from the coal wall respectively.

Claims

1. A swing arm housing for a thin coal seam mining machine, characterized in that: Its main body is a boom extending to the left and right. The boom has a transmission cavity for installing the cutting transmission mechanism. The two ends of the transmission cavity are respectively set as input gear mounting holes and output gear mounting holes. The ends where the input gear mounting holes and output gear mounting holes are located are called the high-speed end and low-speed end of the boom, respectively. A connecting arm is provided in the middle of the boom, which extends forward from the boom. The connecting arm has a front arm and a rear arm that extend to the left or right from the connecting arm. The front arm, rear arm and the high-speed end of the boom are arranged in sequence from front to back. The front arm and rear arm are respectively provided with front pin mounting holes and rear pin mounting holes for the cutting motor to act as a pin shaft for installation. The front pin mounting holes and rear pin mounting holes are coaxial with the input gear mounting holes to ensure that the cutting motor transmits power coaxially with the input gear after installation. A set of spherical bearings is installed in each of the front pin mounting holes and rear pin mounting holes. The outer ring of the spherical bearings is fixed relative to the front pin mounting holes and rear pin mounting holes.

2. The swing arm housing of the thin coal seam mining machine as described in claim 1, characterized in that: The connecting arm is a thin, flat structure with a width smaller than its height, and the top surface of the connecting arm is sloping. In the left-right direction, the top surface of the connecting arm is higher as it approaches the high-speed end of the boom.

3. The swing arm housing of the thin coal seam mining machine as described in claim 2, characterized in that: The connecting arm extends downward beyond the bottom surface of the middle part of the boom. The connecting arm has an inner cavity that communicates with the inner cavity of the boom. Multiple mounting positions for enhanced coolers are arranged side by side in the inner cavity of the connecting arm. Each mounting position for enhanced coolers includes two mounting holes, one in front and one behind.

4. The swing arm housing of a thin coal seam mining machine as described in claim 3, characterized in that: The boom has a rearward protruding ridge structure in the middle, and the cavity inside the ridge structure is an auxiliary cavity, which is part of the inner cavity of the boom.

5. The swing arm housing of a thin coal seam mining machine as described in claim 4, characterized in that: The outer surface of the cantilever end of the forearm and the outer surface of the cantilever end of the rear arm are both configured as convex arc cylindrical surfaces coaxial with the front pin mounting hole, and the side of the connecting arm near the high-speed end of the boom is configured as a concave arc cylindrical surface coaxial with the front pin mounting hole.

6. The swing arm housing of a thin coal seam mining machine as described in claim 5, characterized in that: The outer surface of the high-speed end of the boom is configured as a convex arc cylindrical surface coaxial with the gear mounting hole at the input end.

7. The swing arm housing of a thin coal seam mining machine as described in claim 6, characterized in that: The side of the connecting arm near the low-speed end of the boom is configured as a concave arc cylindrical surface coaxial with the gear mounting hole at the output end.

8. The swing arm housing of a thin coal seam mining machine as described in claims 1, 2, 3, 4, 5, 6, or 7, characterized in that: The low-speed end of the boom is inclined and bent downward relative to the other parts of the boom, forming an arched structure with its bottom surface facing upward at the middle of the boom in the left-right direction near the low-speed end of the boom. The opening formed by the arched structure is the loading channel.

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