Sliding type cutting system of coal mining machine

Abstract

The invention relates to a slippage type cutting system of a coal mining machine, which comprises a slippage part, a non-slippage part and a slippage oil cylinder, the slippage part and the non-slippage part are in sliding connection left and right through the matching of a guide chute and a guide slide rail, and the two ends of the slippage oil cylinder are respectively hinged on the slippage part and the non-slippage part; an upper row of supporting oil cylinders and a lower row of supporting oil cylinders are further arranged at the outer end of the non-sliding part, each row of supporting oil cylinders are arranged at intervals in the front-back direction, and when the sliding part moves to the front position or the rear position relative to the non-sliding part, piston rods of the upper row of supporting oil cylinders and the lower row of supporting oil cylinders located on the front portion or the rear portion extend to the sliding part and abut against the guide sliding rails. The piston rod retracts to break away from the sliding part. When the device is applied to the mining and drilling all-in-one machine, the conveyor can be normally pushed in each coal mining stroke, a passing space does not need to be reserved for a roller which stops in the drilling operation, the gas drilling drainage operation of a working face is greatly facilitated, and the mining efficiency of the mining and drilling all-in-one machine is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a coal mining machine cutting system, comprising a rocker arm, a cutting motor, a cutting transmission system and a drum, in particular to a coal mining machine cutting system in which the rocker arm adopts a left-right split structure and the split parts can slide relative to each other. BACKGROUND

[0002] In gas mines, the mining of medium-thick and above coal seams usually requires drilling, water injection and gas extraction on the to-be-mined coal seam in the crossheading and working face to reduce the gas concentration in the coal seam and improve the safety of mining. Crossheading gas extraction can be operated in parallel with working face mining, without affecting mining advancement, but the gas extraction process in the working face seriously affects the mining efficiency. At present, in order to improve the efficiency of drilling extraction, multiple drilling machines are usually arranged along the working face at intervals and drilled synchronously, and each drilling machine is configured with 2 persons. When each batch of drilling is completed, the entire batch of drilling machines is moved to a new position synchronously, and then the drilling machines are fixed for drilling. According to safety management regulations, the number of operating personnel needs to be controlled, and the working face usually reduces the number of equipment maintenance personnel to meet the drilling operation, and equipment maintenance and drilling cannot be operated in parallel. Drilling operation reduces the mining efficiency, increases the labor intensity, brings safety hazards, and affects the mine benefit.

[0003] In order to solve the above problems, the applicant of the present application proposes a drilling and mining integrated machine which integrates the drilling machine on the top of the coal mining machine. In use, the drilling and mining integrated machine first walks along the coal wall face in sections and drills the coal wall in sections, then moves the conveyor close to the coal wall to prepare for coal mining, and then starts the drilling and mining integrated machine for a period of coal mining. When cutting the last cut in a coal mining period, in order to provide a passing space for the stopped coal mining drum in the subsequent drilling operation, the conveyor cannot be moved towards the coal wall with the coal mining machine, and needs to be moved separately after drilling, which affects the mining efficiency. SUMMARY

[0004] The present application provides a sliding cutting system of a coal mining machine, which is applied to the drilling and mining integrated machine and can place the sliding part relative to the non-sliding part away from the coal wall before drilling operation, i.e. the coal mining drum is placed above the conveyor instead of in front of the conveyor, so as to eliminate the problem of providing a passing space for the stopped drum.

[0005] The main technical solutions of the present application are as follows: A sliding cutting system for a coal mining machine includes a sliding section, a non-sliding section, and sliding cylinders. The sliding section and the non-sliding section are slidably connected, one on the left and one on the right. The two ends of the sliding cylinder are respectively hinged to the sliding section and the non-sliding section. The sliding section can move back and forth relative to the non-sliding section under the action of the sliding cylinder. The non-sliding section is provided with a body connecting lug and a height adjustment cylinder connecting lug. The axes of the connecting lug holes on the body connecting lug and the height adjustment cylinder connecting lug both extend back and forth. The sliding section includes a sliding section housing, a cutting motor, a cutting transmission system, and a drum. The cutting motor and the cutting transmission system... The system is mounted on the sliding part housing and sequentially connected by transmission. The roller is coaxially mounted on the output end of the cutting transmission system, with the cutting motor closest to the non-sliding part. The part closest to the non-sliding part is the inner part, and the part closest to the sliding part is the outer part. The outer end of the non-sliding part has a C-shaped guide groove extending forward and backward with an open outer side. The inner end of the sliding part housing has a guide rail extending forward and backward. The non-sliding part and the sliding part are connected by corresponding upper and lower guide surface groups on the guide groove and guide rail, respectively, to achieve a forward and backward sliding connection. The upper guide surface group of the guide groove includes sequentially arranged... The guide slide rail has an inner upper guide surface, a top guide surface, and an outer upper guide surface. The lower guide surface assembly of the guide slide rail includes an inner lower guide surface, a bottom guide surface, and an outer lower guide surface arranged in sequence. The upper guide surface assembly of the guide slide rail includes an inner upper wear-resistant guide surface, a top wear-resistant guide surface, and an outer upper wear-resistant guide surface arranged in sequence. The lower guide surface assembly of the guide slide rail includes an inner lower wear-resistant guide surface, a bottom wear-resistant guide surface, and an outer lower wear-resistant guide surface arranged in sequence. The inner upper guide surface, top guide surface, outer upper guide surface, inner lower guide surface, bottom guide surface, and outer lower guide surface are... Do not align with the inner upper wear-resistant guide surface, top wear-resistant guide surface, outer upper wear-resistant guide surface, inner lower wear-resistant guide surface, bottom wear-resistant guide surface, and outer lower wear-resistant guide surface; the bottom of the guide slide groove is equipped with two rows of upper and lower support cylinders, each row arranged at intervals. No matter where the sliding part moves forward or backward, the piston rods of the upper and lower support cylinders can extend to the sliding part and press against the guide slide rail. When the sliding part is ready to move to another position, the piston rod of the corresponding support cylinder retracts into the non-sliding part and disengages from the sliding part.

[0006] Each row has at least three support cylinders, and when the sliding part is at the front or rear limit position relative to the non-sliding part, the extended ends of the piston rods of at least two support cylinders in each row are pressed against the sliding part.

[0007] The structure and relative position of the body connecting lug and the height adjustment cylinder connecting lug on the non-sliding part are preferably the same as those on the existing coal mining machine rocker arm.

[0008] A non-slip part cylinder connecting seat is provided between the front or rear part and the upper and lower inner guide surfaces of the non-slip part. Correspondingly, a sliding part cylinder connecting seat is provided between the rear or front part and the upper and lower inner wear-resistant guide surfaces of the sliding part housing. The two ends of the sliding cylinder are respectively hinged to the non-slip part cylinder connecting seat and the sliding part cylinder connecting seat.

[0009] The non-sliding part cylinder connecting seat includes a first upper connecting block, a first lower connecting block, and a first sliding cylinder pin. The upper and lower ends of the first sliding cylinder pin are respectively fixed on the first upper connecting block and the first lower connecting block. The sliding part cylinder connecting seat includes a second upper connecting block, a second lower connecting block, and a second sliding cylinder pin. The upper and lower ends of the second sliding cylinder pin are respectively fixed on the second upper connecting block and the second lower connecting block.

[0010] The upper part of the outer end of the non-sliding part is provided with a stepped hole that is larger at the top and smaller at the bottom. The larger diameter hole is the upper disassembly hole, and the smaller diameter hole is the upper pin hole of the hydraulic cylinder and is located in the first upper connecting block. The lower part of the outer end of the non-sliding part is provided with a stepped hole that is smaller at the top and larger at the bottom. The larger diameter hole is the lower disassembly hole, and the smaller diameter hole is the lower pin hole of the hydraulic cylinder and is located in the first lower connecting block. The upper and lower ends of the first sliding hydraulic cylinder pin are respectively fixed in the upper pin hole and the lower pin hole of the hydraulic cylinder.

[0011] The non-slip section may include a non-slip section body, an upper pressure plate, and a lower pressure plate. The inner sides of the body connecting lug, the height adjustment cylinder connecting lug, and the C-shaped guide groove are mostly located on the non-slip section body. The upper pressure plate and the lower pressure plate are respectively connected and installed at the upper outer end and the lower outer end of the non-slip section body. The lower part of the upper pressure plate and the upper part of the lower pressure plate extend downward and upward, respectively. The inner sides of the respective extended parts of the upper and lower pressure plates constitute the outer upper guide surface and the outer lower guide surface, respectively. The non-slip section body is also provided with multiple support cylinder mounting cavities. Each support cylinder mounting cavity is equipped with one support cylinder. The support cylinder mounting cavity includes a large chamber with a rectangular cross-section for accommodating the cylinder barrel and a small chamber for sliding cooperation with the piston rod extension end of the support cylinder. The outer ports of the small chambers of the upper and lower rows of support cylinder safety cavities are respectively opened on the inner upper guide surface and the inner lower guide surface.

[0012] The upper inner guide surface and the top guide surface are smoothly transitioned by an upper arc-shaped guide surface, and the lower inner guide surface and the bottom guide surface are smoothly transitioned by a lower arc-shaped guide surface. Correspondingly, the upper inner wear-resistant guide surface and the top wear-resistant guide surface are smoothly transitioned by an upper arc-shaped wear-resistant guide surface, and the lower inner wear-resistant guide surface and the bottom wear-resistant guide surface are smoothly transitioned by a lower arc-shaped wear-resistant guide surface. The upper arc-shaped guide surface and the lower arc-shaped guide surface are respectively fitted to the upper arc-shaped wear-resistant guide surface and the lower arc-shaped wear-resistant guide surface.

[0013] The sliding part housing includes a boom housing, an upper wear-resistant plate, and a lower wear-resistant plate that are detachably and fixedly connected together. Both the upper and lower wear-resistant plates are strips that extend back and forth and have an L-shaped cross-section. The upper and lower wear-resistant plates are respectively fitted into the upper and lower corners of the inner end of the boom housing. The inner upper wear-resistant guide surface, the top wear-resistant guide surface, and the outer upper wear-resistant guide surface are located on the upper wear-resistant plate, while the inner lower wear-resistant guide surface, the bottom wear-resistant guide surface, and the outer lower wear-resistant guide surface are located on the lower wear-resistant plate.

[0014] Preferably, the upper wear-resistant plate has a U-shaped upper sealing groove extending to the same plane and two straight upper oil grooves extending to the same plane. The lower, middle, and upper parts of the U-shape of the upper sealing groove are located on the inner upper wear-resistant guide surface, the top wear-resistant guide surface, and the outer upper wear-resistant guide surface, respectively. The two vertical sides of the U-shape of the upper sealing groove are close to the front and rear ends of the upper wear-resistant plate, respectively. One end, the middle, and the other end of the upper oil groove are located on the inner upper wear-resistant guide surface, the top wear-resistant guide surface, and the outer upper wear-resistant guide surface, respectively. The two upper oil grooves are spaced apart between the two vertical sides of the U-shape of the upper sealing groove. Each upper oil groove has at least one oil hole communicating with it. The oil hole is located inside the upper wear-resistant plate, and its inlet is located on the front or rear end face of the upper wear-resistant plate. The lower wear-resistant plate has a U-shaped upper sealing groove extending to the same plane. The lower sealing groove is U-shaped and consists of two lower oil grooves that extend to the same plane and form a straight line. The lower, middle, and upper parts of the U-shape of the lower sealing groove are located on the inner lower wear-resistant guide surface, the bottom wear-resistant guide surface, and the outer lower wear-resistant guide surface, respectively. The two vertical sides of the U-shape of the lower sealing groove are close to the front and rear ends of the lower wear-resistant plate, respectively. One end, the middle, and the other end of the lower oil groove are located on the inner lower wear-resistant guide surface, the bottom wear-resistant guide surface, and the outer lower wear-resistant guide surface, respectively. The two lower oil grooves are spaced apart between the two vertical sides of the U-shape of the lower sealing groove. Each lower oil groove has at least one lower oil hole communicating with it. The lower oil hole is located inside the lower wear-resistant plate and its inlet is located on the front or rear end face of the lower wear-resistant plate. Sealing strips are installed in both the upper and lower sealing grooves, and oil cups are installed at the inlets of the upper and lower oil holes, respectively.

[0015] The beneficial effects of this invention are: The coal mining machine utilizing this invention can reduce the distance between the drum and the conveyor by appropriately moving the sliding section backward. Compared to the fixed shovel tip distance in the prior art, this improves the loading effect, especially under harsh working conditions such as mining from below. After the conveyor moves forward with the coal mining machine, the cutting system located behind the sliding section is positioned above the conveyor, allowing it to easily move above the conveyor without being affected by the coal face. Therefore, when this invention is used in a mining and drilling integrated machine, the conveyor can be moved normally during each coal mining stroke, eliminating the need to reserve passage space for the drum that stops rotating during drilling operations. This greatly facilitates gas drilling and drainage operations at the working face and improves the mining efficiency of the mining and drilling integrated machine.

[0016] Because multiple support cylinders are installed in the non-sliding part, when the sliding part moves to the front or rear limit position relative to the non-sliding part, the piston rod extending from the support cylinder can be pressed against the wear-resistant guide surface on the inner upper and lower inner wear-resistant guide surfaces of the sliding part to fix and lock the sliding part relative to the non-sliding part. Therefore, the reliability of the sliding cutting system is greatly improved. In particular, when cutting coal, the cutting system is subjected to large forces and strong vibrations, and the effect of improving the reliability of the sliding cutting system is even more prominent.

[0017] The support cylinder is installed on the non-sliding part. Compared with the sliding part, the pipelines of the support cylinder and the sensor inside the cylinder are easier to lay out, and the internal space of the non-sliding part can be fully utilized to protect the pipelines.

[0018] Since the structure and relative position of the body connecting lug and the height adjustment cylinder connecting lug on the non-sliding part are the same as those on the existing coal mining machine rocker arm, the coal mining machine sliding cutting system can be seamlessly replaced with the existing cutting system.

[0019] Maintaining a large span between the matching upper and lower guide surface assemblies helps reduce sliding contact force and improve sliding reliability.

[0020] Since the upper guide surface group and the lower guide surface group each adopt three wide contact surfaces, and all surfaces in the four directions of up, down, left, and right are in contact, and there are one or two pairs of contact surfaces in a certain direction, the contact pressure is greatly reduced, the wear at the sliding fit is reduced, and thus helps to improve the service life of the coal mining machine sliding cutting system.

[0021] The first and second sliding cylinder connecting seats and the sliding cylinder are located between the upper and lower guide surface assemblies, and are all located in the guide groove, which has good protection and a compact structure that saves installation space. Attached Figure Description

[0022] Figure 1 This is a front view of one embodiment of the sliding cutter system of the coal mining machine; Figure 2 for Figure 1 Top view (sliding part in front state); Figure 3 for Figure 1 Top view (sliding part in rear position); Figure 4 for Figure 1 A schematic diagram of the non-slip portion in the middle; Figure 5 for Figure 4 Top view; Figure 6 for Figure 4A schematic diagram of the structure of the non-slip part of the body; Figure 7 for Figure 6 Top view; Figure 8 for Figure 6 The left view; Figure 9 for Figure 4 Left view of the upper pressure block in the middle; Figure 10 for Figure 1 A schematic diagram of the sliding part in the middle; Figure 11 for Figure 10 A top view (the state after removing the upper and lower wear-resistant plates); Figure 12 for Figure 10 A schematic diagram of the upper wear-resistant plate in the middle; Figure 13 for Figure 12 Top view; Figure 14 for Figure 12 The left view; Figure 15 for Figure 10 A schematic diagram of the lower wear-resistant plate in the middle; Figure 16 for Figure 10 A schematic diagram of the boom structure in the diagram; Figure 17 for Figure 16 Top view; Figure 18 This is a schematic diagram of the supporting hydraulic cylinder; Figure 19 This is a schematic diagram of a coal mining machine that uses the sliding cutting system of the present invention.

[0023] Figure label: 01. Fuselage; 02. Sliding cutting system; 1. Non-sliding part; 11. Non-sliding part body; 111. Body connecting lug; 112. Height adjustment cylinder connecting lug; 116. Pressure plate screw hole; 117. Pressure plate pin hole; 118. Mounting hole; 119. Support cylinder mounting cavity; 1131. Inner upper guide surface; 1132. Top guide surface; 1151. First upper connecting block; 1152. First lower connecting block; 1153. Cylinder upper pin hole; 1154. Cylinder lower pin hole; 1155. Upper disassembly hole; 1156. Lower disassembly hole; 1141. Inner lower guide surface; 1142. Bottom guide surface; 142. Pressure plate positioning pin; 161. Upper pressure plate; 1611. Outer upper guide surface; 162. Lower pressure plate; 1621. Outer lower guide surface; 2. Sliding part; 21. Boom housing; 22. Upper wear-resistant plate; 2241. Inner upper wear-resistant guide surface; 2242. Top wear-resistant guide surface; 2243. Outer upper wear-resistant guide surface; 226. Second upper connecting block; 2271. Longitudinal hole; 2272. Transverse hole; 228. Upper sealing groove; 229. Upper oil groove; 23. Lower wear-resistant plate; 2341. Inner lower wear-resistant guide surface; 2342. Bottom wear-resistant guide surface; 2343. Outer lower wear-resistant guide surface; 236. Second lower connecting block; 2371. Longitudinal hole; 2372. Transverse hole; 238. Lower sealing groove; 26. Cutting motor; 27. Cutting transmission system; 28. Drum; 3. Sliding cylinder; 4. Sliding cylinder pin; 53. Grease area; 6. Support cylinder; 61. Cylinder barrel; 63. Piston rod; 7. Support cylinder pin. Detailed Implementation

[0024] like Figures 1-19 As shown, this invention discloses a sliding cutting system 02 for a coal mining machine (hereinafter referred to as a sliding cutting system), including a sliding part 2, a non-sliding part 1, and a sliding cylinder 3. The sliding part and the non-sliding part are slidably connected, one on the left and one on the right. The two ends of the sliding cylinder are respectively hinged to the sliding part and the non-sliding part. Under the action of the sliding cylinder, the sliding part can move back and forth relative to the non-sliding part. The non-sliding part is provided with a body connecting lug 111 and a height adjustment cylinder connecting lug 112 for hinged connection with the body 01 of the coal mining machine and the height adjustment cylinder (see [reference]). Figure 19 The axes of the connecting lugs on the machine body and the connecting lugs on the height adjustment cylinder both extend forward and backward. The sliding part includes a sliding part housing, a cutting motor 26, a cutting transmission system 27, and a drum 28. The cutting motor and the cutting transmission system are mounted on the sliding part housing and are connected in sequence for transmission. The drum is coaxially mounted on the output end of the cutting transmission system, with the cutting motor being closest to the non-sliding part.

[0025] For ease of description, the part closer to the non-sliding section is referred to as the inner part, and the part closer to the sliding section is referred to as the outer part. The outer end of the non-sliding section is provided with a C-shaped guide groove that extends front to back and has an opening on the outer side (see...). Figures 4-6 The inner end of the sliding housing is provided with a guide rail extending forward and backward (see...). Figure 10Both the C-shaped guide groove and the guide rail are provided with upper and lower guide surface groups. The non-sliding part and the sliding part are connected by corresponding upper and lower guide surface groups on the guide groove and the guide rail to achieve a front-to-back sliding connection. The upper guide surface group of the guide groove includes an inner upper guide surface 1131, a top guide surface 1132 and an outer upper guide surface 1611 arranged in sequence. The lower guide surface group of the guide groove includes an inner lower guide surface 1141, a bottom guide surface 1142 and an outer lower guide surface 1621 arranged in sequence. The upper guide surface group of the guide rail includes an inner upper wear-resistant guide surface 2241, a top wear-resistant guide surface 2242 and an outer upper wear-resistant guide surface 2243 arranged in sequence. The lower guide surface group of the guide rail includes an inner lower wear-resistant guide surface 2341, a bottom wear-resistant guide surface 2342 and an outer lower wear-resistant guide surface 2343 arranged in sequence. The inner upper guide surface, top guide surface, outer upper guide surface, inner lower guide surface, bottom guide surface, and outer lower guide surface are respectively fitted to the inner upper wear-resistant guide surface, top wear-resistant guide surface, outer upper wear-resistant guide surface, inner lower wear-resistant guide surface, bottom wear-resistant guide surface, and outer lower wear-resistant guide surface. A relatively large span is preferably maintained between the mating upper and lower guide surface groups to help reduce sliding contact forces and improve sliding reliability.

[0026] The bottom of the guide chute is equipped with multiple support cylinders 6 arranged in two rows, one above the other, with each row spaced apart. This ensures that regardless of the sliding part's position, the piston rods 63 of both the upper and lower support cylinders can extend to the sliding part and press against the guide rail. In other words, the piston rods of the extended support cylinders fix and lock the sliding part relative to the non-sliding part, thus greatly improving the reliability of the sliding cutting system. This is especially important during coal cutting when the system experiences high forces and vibrations, making the improved reliability even more crucial. When the sliding part is ready to move again, the piston rod of the corresponding support cylinder retracts into the non-sliding part, and the extended end of the piston rod disengages from the sliding part. Preferably, the support cylinders are positioned between the upper and lower guide surface groups in the vertical direction.

[0027] Furthermore, each row has at least three support cylinders, and when the sliding part is at its front or rear limit relative to the non-sliding part, the extended ends of the piston rods of at least two support cylinders in each row rest against the sliding part. Thus, a total of four support cylinders (top, bottom, front, and back) simultaneously provide support. Using more support cylinders helps to improve the locking degree of the sliding part relative to the non-sliding part. Typically, the cylinder barrel 61 of the support cylinder can be mounted on the non-sliding part using support cylinder pins 7.

[0028] When the combination of the sliding part and the non-sliding part is in a left-right extending state, the top guide surface, bottom guide surface, top wear-resistant guide surface, and bottom wear-resistant guide surface are all horizontal planes extending forward and backward, while the other guide surfaces are vertical planes extending forward and backward. Since the upper guide surface group and the lower guide surface group each use three wide contact surfaces, and all surfaces in the four directions (up, down, left, and right) are in contact, with one or two pairs of contact surfaces in a certain direction, the contact pressure is greatly reduced, the wear at the sliding joint is reduced, and thus the service life of the coal mining machine sliding cutting system is improved.

[0029] The guide groove and guide rail are preferably symmetrical in structure, which facilitates processing.

[0030] The structure and relative position of the body connecting lug 111 and the height adjustment cylinder connecting lug 112 on the non-sliding part are the same as those on the existing coal mining machine rocker arm. Therefore, the coal mining machine sliding cutting system can be seamlessly replaced with the existing cutting system.

[0031] The front part of the non-slip portion (e.g.) Figure 7 , 8 As shown) or between the rear and inner upper and lower guide surfaces, a non-sliding cylinder connecting seat is provided, and correspondingly, the rear part of the sliding housing (such as Figure 11 , 13 As shown in Figure 14, a sliding cylinder connecting seat is provided between the upper and lower wear-resistant guide surfaces on the front and inner sides. The two ends of the sliding cylinder are respectively hinged to the non-sliding cylinder connecting seat and the sliding cylinder connecting seat. In the installed state, the non-sliding cylinder connecting seat, the sliding cylinder connecting seat, and the sliding cylinder are all located in the guide groove, thus providing good protection and a compact structure that saves installation space.

[0032] The non-sliding cylinder connecting seat includes a first upper connecting block 1151, a first lower connecting block 1152, and a first sliding cylinder pin. The upper and lower ends of the first sliding cylinder pin are respectively fixed in corresponding pin holes 1153 and 1154 on the first upper and first lower connecting blocks. The sliding cylinder connecting seat includes a second upper connecting block 226, a second lower connecting block 236, and a second sliding cylinder pin. The upper and lower ends of the second sliding cylinder pin are respectively fixed in corresponding pin holes on the second upper and second lower connecting blocks. The first sliding cylinder pin and the second sliding cylinder pin are collectively referred to as sliding cylinder pin 4. The first upper connecting block and the first lower connecting block are part of the non-sliding part, and the second upper connecting block and the second lower connecting block are part of the sliding part housing.

[0033] Furthermore, such as Figures 4-8As shown, both the first upper connecting block and the first lower connecting block are located at the front end of the non-sliding part and extend outwards. The upper part of the outer end of the non-sliding part has a stepped hole with a larger diameter at the top and a smaller diameter at the bottom. The larger diameter hole is the upper disassembly hole 1155, and the smaller diameter hole is the upper cylinder pin hole 1153, located in the first upper connecting block. The lower part of the outer end of the non-sliding part has a stepped hole with a smaller diameter at the top and a larger diameter at the bottom. The larger diameter hole is the lower disassembly hole 1156, and the smaller diameter hole is the lower cylinder pin hole 1154, located in the first lower connecting block. The upper and lower ends of the first sliding cylinder pin are fixed in the upper and lower cylinder pin holes, respectively. The sliding cylinder pin 4 can be disassembled and removed through the upper and lower disassembly holes.

[0034] The sliding cylinder 3 is equipped with a cylinder stroke sensor.

[0035] like Figures 4-9 As shown, the non-slip part may include a non-slip part body 11, an upper pressure plate 161 and a lower pressure plate 162. The body connecting lug, the height adjustment cylinder connecting lug, the inner part of the C-shaped guide slide groove, the first upper connecting block and the first lower connecting block are all disposed on the non-slip part body. The upper pressure plate 161 and the lower pressure plate 162 are respectively mated and installed at the upper outer end and the lower outer end of the non-slip part body. The lower part of the upper pressure plate and the upper part of the lower pressure plate extend downward and upward respectively. The inner surfaces of the respective extended parts of the upper pressure plate and the lower pressure plate constitute the outer upper guide surface 1611 and the outer lower guide surface 1621 respectively.

[0036] The main body of the non-slip section is a connecting plate. The body connecting lug and the height adjustment cylinder connecting lug are connected to the inner side of the connecting plate. The inner part of the C-shaped guide groove is mostly located at the outer end of the connecting plate. Since the groove opening faces outward, the outer end face of the connecting plate is divided into an upper end face and a lower end face, which are the mounting base surfaces of the upper and lower pressure plates, respectively. Several pressure plate pin holes 117 are provided on the upper and lower end faces of the outer side of the connecting plate for installing pressure plate positioning pins 142 for positioning the upper and lower pressure plates. A rectangular mounting hole 118 with internal and external penetration is provided in the middle of the connecting plate. Several pressure plate screw holes 116 are provided on the upper and lower parts of the connecting plate for connecting the upper and lower pressure plates to the non-slip section body.

[0037] Specifically, the non-slip part body has multiple support cylinder mounting cavities 119 on the connecting plate. Each support cylinder mounting cavity corresponds to a support cylinder, and one support cylinder is installed in each support cylinder mounting cavity. The support cylinder mounting cavity includes a large chamber with a rectangular cross-section for accommodating the cylinder barrel and a small chamber for sliding cooperation with the piston rod extension end of the support cylinder. The outer ports of the small chambers in the upper and lower rows of support cylinder safety cavities are respectively opened on the inner upper guide surface and the inner lower guide surface.

[0038] The upper inner guide surface and the top guide surface are smoothly transitioned by an upper arc-shaped guide surface, and the lower inner guide surface and the bottom guide surface are smoothly transitioned by a lower arc-shaped guide surface. Correspondingly, the upper inner wear-resistant guide surface and the top wear-resistant guide surface are smoothly transitioned by an upper arc-shaped wear-resistant guide surface, and the lower inner wear-resistant guide surface and the bottom wear-resistant guide surface are smoothly transitioned by a lower arc-shaped wear-resistant guide surface. The upper arc-shaped guide surface and the lower arc-shaped guide surface are respectively fitted to the upper arc-shaped wear-resistant guide surface and the lower arc-shaped wear-resistant guide surface.

[0039] like Figures 10-17 As shown, the sliding part housing may include a boom housing 21, an upper wear-resistant plate 22, and a lower wear-resistant plate 23 that are detachably and fixedly connected together. Both the upper and lower wear-resistant plates are strips extending forward and backward with an L-shaped cross-section. The upper and lower wear-resistant plates are respectively fitted into the upper and lower corners of the inner end of the boom, i.e., at the upper and lower edges of the forward and backward extending sections. The inner upper wear-resistant guide surface, the top wear-resistant guide surface, and the outer upper wear-resistant guide surface are located on the upper wear-resistant plate, while the inner lower wear-resistant guide surface, the bottom wear-resistant guide surface, and the outer lower wear-resistant guide surface are located on the lower wear-resistant plate.

[0040] Furthermore, the second upper connecting block and the second lower connecting block can exist as part of the upper wear-resistant plate and the lower wear-resistant plate, respectively. As shown in the figure, the second upper connecting block and the second lower connecting block are located at the rear end of the upper wear-resistant plate and the rear end of the lower wear-resistant plate, respectively, and extend inward. When the cylinder connecting seat of the non-slip part is located at the rear of the non-slip part, the second upper and lower connecting blocks are located at the front end of the upper and lower wear-resistant plates. When the combination of the sliding part and the non-slip part is in a left-right extending state, the second upper connecting block and the second lower connecting block are both in a horizontal state. In the embodiment shown in the figure, the upper wear-resistant plate and the lower wear-resistant plate (including their respective lubrication structures (see below)) are symmetrical structures to simplify the structure and processing.

[0041] When a wear-resistant guide surface wears out, the upper and / or lower wear-resistant plates can be partially replaced to extend the service life of the sliding part and reduce maintenance costs.

[0042] like Figures 12-15As shown, the upper wear-resistant plate is further provided with an upper sealing groove 228 that extends to the same plane and forms a U-shape, and two upper oil grooves 229 that extend to the same plane and form a straight line. The lower, middle, and upper parts of the U-shape of the upper sealing groove are located on the inner upper wear-resistant guide surface, the top wear-resistant guide surface, and the outer upper wear-resistant guide surface, respectively. The two vertical sides of the U-shape of the upper sealing groove are close to the front and rear ends of the upper wear-resistant plate, respectively. One end, the middle, and the other end of the upper oil groove are located on the inner upper wear-resistant guide surface, the top wear-resistant guide surface, and the outer upper wear-resistant guide surface, respectively. The two upper oil grooves are spaced apart between the two vertical sides of the U-shape of the upper sealing groove and are preferably parallel to it. Each upper oil groove has at least one oil hole (composed of multiple segments of holes such as longitudinal hole 2271 and transverse hole 2272) communicating with it. The oil hole is located inside the upper wear-resistant plate and its inlet is located on the front or rear end face of the upper wear-resistant plate (this is the case shown in the attached figure).

[0043] Similarly, the lower wear-resistant plate has a lower sealing groove 238 that extends to the same plane and forms a U-shape, and two lower oil grooves that extend to the same plane and form a straight line. The lower, middle and upper parts of the U-shape of the lower sealing groove are located on the inner lower wear-resistant guide surface, the bottom wear-resistant guide surface and the outer lower wear-resistant guide surface, respectively. The two vertical sides of the U-shape of the lower sealing groove are close to the front end and the rear end of the lower wear-resistant plate, respectively. One end, the middle and the other end of the lower oil groove are located on the inner lower wear-resistant guide surface, the bottom wear-resistant guide surface and the outer lower wear-resistant guide surface, respectively. The two lower oil grooves are spaced apart between the two vertical sides of the U-shape of the lower sealing groove and are preferably parallel to it. Each lower oil groove has at least one lower oil hole (composed of multiple segments of holes such as longitudinal hole 2371 and transverse hole 2372) communicating with it. The lower oil hole is located inside the lower wear-resistant plate and its inlet is located on the front end face or the rear end face of the lower wear-resistant plate (this case is shown in the attached figure).

[0044] When an upper arc-shaped wear-resistant guide surface and a lower arc-shaped wear-resistant guide surface are provided, upper and lower sealing grooves and upper and lower oil grooves also pass through the upper and lower arc-shaped wear-resistant guide surfaces.

[0045] Both the upper and lower sealing grooves are equipped with sealing strips. Oil cups are installed at the inlets of both the upper and lower oil holes. Lubricating grease enters the upper and lower oil holes respectively through their respective inlets, and then flows into the upper and lower oil grooves. As the sliding part moves back and forth relative to the non-sliding part, it is evenly coated onto the grease area 53 surrounded by the upper and lower sealing grooves. Because oil grooves are provided between each pair of mating guide surfaces, all three pairs of contact surfaces are adequately lubricated. Simultaneously, the sealing grooves and sealing strips prevent dust and other contaminants from affecting the contact surfaces, reducing sliding wear and improving sliding reliability. The upper and lower sealing grooves are U-shaped, facilitating grease discharge from both ends of the U-shape. Furthermore, the grease applied to both ends and between them also helps prevent dust from entering the grease area.

[0046] When the sliding cutting system of the present invention is used on a coal mining machine, it can be roughly divided into two types according to the different front and rear positions of the sliding part relative to the non-sliding part: sliding part in front (see...). Figure 2 ) and the sliding part is located at the rear (see Figure 3 The system has two working positions: when the sliding section is in front, it contacts the front end of the non-sliding section; when the sliding section is behind, it contacts the rear end of the non-sliding section. During normal coal mining, the sliding section is in front, similar to a traditional cutting system. However, it is superior to traditional cutting systems in that: for coal mining machines using traditional cutting systems, the distance between the drum and the conveyor may be too large when using different specifications of conveyors. For coal mining machines using this sliding cutting system, appropriately moving the sliding section behind reduces the distance between the drum and the conveyor, improving loading efficiency. After the conveyor moves forward with the coal mining machine, the cutting system with the sliding section behind is positioned above the conveyor, allowing for convenient traction and movement above the moved conveyor without being affected by the coal face. Therefore, when used in a mining and drilling integrated machine, the conveyor can be moved normally during each mining stroke, eliminating the need to reserve passage space for the drum that stops during drilling operations. This greatly facilitates gas drilling and drainage operations at the working face and improves mining efficiency.

[0047] In this article, "left, right, front, back, up, down" are used to describe related structures to express the relative positional relationship between the corresponding structures, not to limit their absolute orientation. The left and right are borrowed from the traction direction when the coal mining machine is working, and the front and back are borrowed from the direction perpendicular to the coal wall, where front is the direction pointing towards the coal wall.

Claims

1. A shearer sledging system characterised in that: The application relates to a mining machine rocker arm, which comprises a sliding part, a non-sliding part and a sliding oil cylinder, the sliding part is connected with the non-sliding part in a sliding mode, the two ends of the sliding oil cylinder are hingedly connected with the sliding part and the non-sliding part, the sliding part can move forward and backward relative to the non-sliding part under the action of the sliding oil cylinder, the non-sliding part is provided with a machine body connecting lug and a height-adjusting oil cylinder connecting lug, the connecting lug holes on the machine body connecting lug and the height-adjusting oil cylinder connecting lug are axially arranged, the sliding part comprises a sliding part shell, a cutting motor, a cutting transmission system and a roller, the cutting motor and the cutting transmission system are sequentially connected and arranged on the sliding part shell, and the roller is coaxially arranged on the output end of the cutting transmission system, wherein the cutting motor is closest to the non-sliding part; the non-sliding part is inside and the sliding part is outside, the outer end of the non-sliding part is provided with a C-shaped guide sliding groove which extends forward and backward and has an opening on the outer side, and the inner end of the sliding part shell is provided with a guide sliding rail which extends forward and backward; the non-sliding part and the sliding part are connected in a forward and backward sliding mode through the corresponding cooperation of the upper and lower guide surface groups on the guide sliding groove and the guide sliding rail; the upper guide surface group of the guide sliding groove comprises sequentially arranged inner upper guide surfaces, top guide surfaces and outer upper guide surfaces; the lower guide surface group of the guide sliding groove comprises sequentially arranged inner lower guide surfaces, bottom guide surfaces and outer lower guide surfaces; the upper guide surface group of the guide sliding rail comprises sequentially arranged inner upper wear-resistant guide surfaces, top wear-resistant guide surfaces and outer upper wear-resistant guide surfaces; the lower guide surface group of the guide sliding rail comprises sequentially arranged inner lower wear-resistant guide surfaces, bottom wear-resistant guide surfaces and outer lower wear-resistant guide surfaces; the inner upper guide surfaces, the top guide surfaces, the outer upper guide surfaces, the inner lower guide surfaces, the bottom guide surfaces and the outer lower guide surfaces are respectively matched with the inner upper wear-resistant guide surfaces, the top wear-resistant guide surfaces, the outer upper wear-resistant guide surfaces, the inner lower wear-resistant guide surfaces, the bottom wear-resistant guide surfaces and the outer lower wear-resistant guide surfaces; the groove bottom of the guide sliding groove is provided with a plurality of support oil cylinders which are arranged in two rows in an up-down mode and are arranged in a forward and backward interval in each row; no matter where the sliding part moves, the piston rods of the upper and lower rows of support oil cylinders can extend to the sliding part and abut on the guide sliding rail; when the sliding part is ready to move again, the piston rods of the corresponding support oil cylinders are retracted into the non-sliding part to be separated from the sliding part.

2. The shearer sled cutting system as claimed in claim 1, wherein: Each row of support oil cylinders has at least three, and when the sliding part is at the front end or the rear end limit position relative to the non-sliding part, the piston rods of at least two support oil cylinders in each row abut on the sliding part.

3. The shearer sled cutting system of claim 1 wherein: The structure and relative position of the machine body connecting lug and the height-adjusting oil cylinder connecting lug on the non-sliding part are the same as those of the machine body connecting lug and the height-adjusting oil cylinder connecting lug on the rocker arm of the existing mining machine.

4. The shearer sled cutting system of claim 1 wherein: The non-sliding part oil cylinder connecting seat is arranged between the front or rear inner upper and lower guide surfaces of the non-sliding part, and the sliding part oil cylinder connecting seat is arranged between the front or rear inner upper and lower wear-resistant guide surfaces of the sliding part shell, and the two ends of the sliding oil cylinder are hingedly connected with the non-sliding part oil cylinder connecting seat and the sliding part oil cylinder connecting seat.

5. The shearer sled cutting system as claimed in claim 4, wherein: The non-sliding part oil cylinder connecting seat comprises a first upper connecting block, a first lower connecting block and a first sliding oil cylinder pin, the upper and lower ends of the first sliding oil cylinder pin are fixed on the first upper connecting block and the first lower connecting block respectively, the non-sliding part oil cylinder connecting seat comprises a second upper connecting block, a second lower connecting block and a second sliding oil cylinder pin, the upper and lower ends of the second sliding oil cylinder pin are fixed on the second upper connecting block and the second lower connecting block respectively.

6. The shearer sled cutting system of claim 5 wherein: The outer end upper part of the non-sliding part is provided with a stepped hole with a large diameter upper part and a small diameter lower part, the large diameter hole is an upper dismounting hole, the small diameter hole is an oil cylinder upper pin hole and is located in the first upper connecting block, the outer end lower part of the non-sliding part is provided with a stepped hole with a small diameter upper part and a large diameter lower part, the large diameter hole is a lower dismounting hole, the small diameter hole is an oil cylinder lower pin hole and is located in the first lower connecting block, the upper and lower ends of the first sliding oil cylinder pin are fixed in the oil cylinder upper pin hole and the oil cylinder lower pin hole respectively.

7. The shearer sled cutting system of claim 1, 2, 3, 4, 5, or 6, wherein: The non-sliding part comprises a non-sliding part body, an upper pressing plate and a lower pressing plate, the fuselage connecting lug, the height adjusting oil cylinder connecting lug and the inner side of the C-shaped guide sliding groove are arranged on the non-sliding part body, the upper pressing plate and the lower pressing plate are respectively butted and installed on the upper outer end and the lower outer end of the non-sliding part body, and the lower part of the upper pressing plate and the upper part of the lower pressing plate respectively downwardly and upwardly overhang, the inner side surfaces of the respective overhanging parts of the upper pressing plate and the lower pressing plate respectively form the outer side upper guide surface and the outer side lower guide surface; the non-sliding part body is further provided with a plurality of support oil cylinder installation cavities, one support oil cylinder is installed in each support oil cylinder installation cavity, the support oil cylinder installation cavity comprises a large chamber with a rectangular cross section for accommodating the cylinder barrel of the oil cylinder and a small chamber for slidingly fitting with the inner and outer ends of the piston rod of the support oil cylinder, the outer ports of the small chambers of the upper and lower rows of support oil cylinder safety cavities are respectively opened on the inner side upper guide surface and the inner side lower guide surface.

8. The shearer sled cutting system of claim 7 wherein: The inner side upper guide surface and the top guide surface are smoothly connected by an upper arc-shaped guide surface, the inner side lower guide surface and the bottom guide surface are smoothly connected by a lower arc-shaped guide surface, correspondingly, the inner side upper wear-resistant guide surface and the top wear-resistant guide surface are smoothly connected by an upper arc-shaped wear-resistant guide surface, and the inner side lower wear-resistant guide surface and the bottom wear-resistant guide surface are smoothly connected by a lower arc-shaped wear-resistant guide surface, the upper arc-shaped guide surface and the lower arc-shaped guide surface respectively correspond to the upper arc-shaped wear-resistant guide surface and the lower arc-shaped wear-resistant guide surface.

9. The shearer sled cutting system of claim 1, 2, 3, 4, 5, 6, 7, or 8, wherein: The sliding part shell comprises an arm support shell, an upper wear-resistant plate and a lower wear-resistant plate which are detachably and fixedly connected together, the upper wear-resistant plate and the lower wear-resistant plate are both strip-shaped members extending frontward and rearward and having an L-shaped cross section, the upper wear-resistant plate and the lower wear-resistant plate are respectively and conformingly installed on the upper corner part and the lower corner part of the inner end part of the arm support shell, the inner side upper wear-resistant guide surface, the top wear-resistant guide surface and the outer side upper wear-resistant guide surface are located on the upper wear-resistant plate, and the inner side lower wear-resistant guide surface, the bottom wear-resistant guide surface and the outer side lower wear-resistant guide surface are located on the lower wear-resistant plate.

10. The shearer sled cutting system of claim 9, wherein: The plate surface of the upper wear plate is provided with an upper sealing groove in U shape after being extended to the same plane and two upper oil grooves in straight line after being extended to the same plane, the lower part, middle part and upper part of the U shape of the upper sealing groove are respectively located on the inner side upper wear guide surface, top wear guide surface and outer side upper wear guide surface, the two vertical edges of the U shape of the upper sealing groove are respectively close to the front end and rear end of the upper wear plate, the one end part, middle part and other end part of the upper oil groove are respectively located on the inner side upper wear guide surface, top wear guide surface and outer side upper wear guide surface, the two upper oil grooves are arranged at intervals between the two vertical edges of the U shape of the upper sealing groove, each upper oil groove is provided with at least one upper oil hole communicating therewith, the upper oil hole is located in the upper wear plate and the inlet thereof is located on the front end surface or rear end surface of the upper wear plate; the plate surface of the lower wear plate is provided with a lower sealing groove in U shape after being extended to the same plane and two lower oil grooves in straight line after being extended to the same plane, the lower part, middle part and upper part of the U shape of the lower sealing groove are respectively located on the inner side lower wear guide surface, bottom wear guide surface and outer side lower wear guide surface, the two vertical edges of the U shape of the lower sealing groove are respectively close to the front end and rear end of the lower wear plate, the one end part, middle part and other end part of the lower oil groove are respectively located on the inner side lower wear guide surface, bottom wear guide surface and outer side lower wear guide surface, the two lower oil grooves are arranged at intervals between the two vertical edges of the U shape of the lower sealing groove, each lower oil groove is provided with at least one lower oil hole communicating therewith, the lower oil hole is located in the lower wear plate and the inlet thereof is located on the front end surface or rear end surface of the lower wear plate; a sealing strip is installed in the upper sealing groove and the lower sealing groove, and an oil cup is installed at the inlet of each upper oil hole and lower oil hole.

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