Ultra-thin coal seam mining machine body

Abstract

The present invention relates to a split bridge structure of a suspended body coal mining machine and a body of an extremely thin coal seam coal mining machine, wherein the bridge structure comprises an intermediate box body and left and right connecting blocks connected to each other, an upper and lower positioning bosses are arranged on the front end surface of the intermediate box body, and left and right connecting ears are arranged at the front of the left and right connecting blocks; the body comprises a fixed reduction box housing, a bridge structure and front and rear guide plates, the upper plane of the upper positioning bosses and the lower plane of the lower positioning bosses respectively form positioning matching surfaces with the upper and lower groove walls of the positioning groove on the rear end surface of the fixed reduction box housing, the left and right connecting ears are respectively inserted into the left and right grooves on the fixed reduction box housing and matched with the left and right positioning pin shaft holes, the rear ends of the left and right connecting blocks are respectively connected to a pair of front and rear guide plates, and the paired front and rear guide plates are provided with guide groove structures with open bottoms. The support part of the present invention can be replaced with a damaged part, and can be matched with conveyors of different widths.

Description

Technical Field

[0001] The invention relates to a coal mining machine bridge structure and a coal mining machine body with the bridge structure. The bridge structure is assembled from a plurality of parts arranged in left and right directions. Background Art

[0002] For coal mining machines with extremely thin coal seams, in order to reduce the height of the machine face and make full use of the space on the side of the coal wall, the main body other than the rocker arm is usually divided into two parts: a bridge structure and a fixed reduction box. The bridge structure spans across the conveyor, and the fixed reduction box is set on the coal wall side of the conveyor. In order to avoid transportation difficulties caused by excessive size, the bridge structure and the fixed reduction box are usually two structures that are detachably fixed and connected. The inner cavity of the bridge structure contains the functions of the electric control box. Once the fixed connection between these two parts is damaged and fails, the entire electric control box will be replaced, thus affecting production and increasing equipment maintenance costs.

[0003] At the same time, the bridge structure of the same width cannot meet the matching requirements of conveyors of different widths. Therefore, when conveyors of different widths are needed, it is necessary to reapply for safety standards and manufacturing, which greatly increases the equipment maintenance cost. Summary of the invention

[0004] The present invention aims to provide a split bridge structure of a suspended body coal mining machine and a body of an extremely thin coal seam coal mining machine. The bridge structure supports replacement of damaged parts and can be matched with conveyors of different widths.

[0005] The main technical solutions of the present invention are:

[0006] A split bridge structure of a suspended-body coal mining machine comprises an intermediate box body and a left connecting block and a right connecting block which are detachably fixed on the left and right sides of the intermediate box body respectively, the intermediate box body is positionedly connected to the left and right connecting blocks, an upper positioning boss and a lower positioning boss which are horizontally protruding forward and extending left and right are provided on the front end surface of the intermediate box body, a left connecting ear and a right connecting ear which are horizontally extended forward are provided at the front part of the left connecting block and the front part of the right connecting block respectively, and the ear holes on the left connecting ear and the right connecting ear are both vertically arranged.

[0007] In the height direction, the upper positioning boss and the lower positioning boss are respectively close to the upper edge and the lower edge of the front end surface of the middle box body.

[0008] The upper positioning boss and the lower positioning boss are preferably arranged along the entire length in the left-right direction of the front end surface of the intermediate box.

[0009] The rear bottom surface of the intermediate box is set as a horizontal plane, and the middle bottom surface is set as a horizontal plane or an arched curved surface. The thickness of the rear part of the intermediate box in the up-down direction is smaller than that of the front part.

[0010] A body of an ultra-thin coal seam coal mining machine, comprising a fixed reduction box housing, a bridge structure, a front guide plate and a rear guide plate, a rear end surface of the fixed reduction box housing being provided with a positioning groove which is horizontally concave forward and extends left and right, a left groove and a right groove being respectively provided on the left and right sides of the positioning groove, and a pin hole which passes through the fixed reduction box housing up and down is respectively provided in the left and right grooves, an upper positioning boss and a lower positioning boss of the bridge structure being inserted into the positioning slot, an upper plane of the upper positioning boss and a lower plane of the lower positioning boss forming positioning matching surfaces with the upper slot wall and the lower slot wall of the positioning slot respectively, a left connecting ear of the left connecting block and a right connecting ear of the right connecting block being respectively inserted into the left groove and the right groove, and an ear hole of the left connecting ear The pin hole of the left groove cooperates with the left positioning pin shaft hole at the same time, and the ear hole of the right connecting ear cooperates with the pin hole of the right groove at the same time and the right positioning pin shaft hole. The rear end of the left connecting block is detachably fixedly connected to a pair of the front guide plate and the rear guide plate, and the rear end of the right connecting block is detachably fixedly connected to a pair of the front guide plate and the rear guide plate. The paired front guide plates and the rear guide plates are fitted front to back, and a lower wear-resistant surface, a front wear-resistant surface and a front upper wear-resistant surface are provided on the front guide plate. A rear upper wear-resistant surface and a rear wear-resistant surface are provided on the rear guide plate. The front upper wear-resistant surface and the rear upper wear-resistant surface constitute an upper wear-resistant surface, and the lower wear-resistant surface, the front wear-resistant surface, the upper wear-resistant surface and the rear wear-resistant surface are connected in sequence to form a groove structure open at the lower rear part.

[0011] The top surface of the front guide plate is preferably an inclined surface that is higher at the front and lower at the back.

[0012] The beneficial effects of the present invention are:

[0013] The upper and lower positioning bosses have a longer support surface when positioned and connected, and the stress condition is better. In contrast, the connection between the left and right connecting ears is relatively weak. The upper and lower positioning bosses and the left and right connecting ears are respectively arranged on the middle box body and the left and right connecting blocks. When the connecting ear on one side is damaged, only the connecting block on the corresponding side needs to be replaced, and the middle box body can still work reliably and will not be scrapped due to damage to the connecting ear on any side. Therefore, the service life is longer and the maintenance cost is significantly reduced.

[0014] When a wider conveyor is needed, the middle box can be kept unchanged, and only the left and right connecting blocks and corresponding connecting parts can be replaced to achieve matching with a wider conveyor and a longer production cycle. Since the middle box remains unchanged, it means that the coal mining machine electronic control system remains unchanged, so there is no need to reapply for safety standards.

[0015] The rear bottom surface of the intermediate box is set to a horizontal plane, and the rear part is flat as a whole, that is, the thickness in the vertical direction is small, at least much smaller than the front part, so that the coal passing space will not be affected even if a wider conveyor is matched. In addition, the middle bottom surface of the intermediate box can still be set to an arched curved surface to increase the coal passing space.

[0016] The top surface of the split bridge structure is set as an inclined plane with a high front and a low back. When the three machines are coordinated, it is convenient to maintain a sufficient gap between the coal mining machine body and the top beam of the support, thereby meeting the mining needs of undulating roof and floor plates, coal gangue, etc., and ensuring the smooth mining of extremely thin or thin coal seams in complex conditions such as coal rock. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the top view of the structure of an embodiment of a coal mining machine using the machine body of the present invention;

[0018] Figure 2 for Figure 1 AA section view;

[0019] Figure 3 for Figure 1 BB cross-sectional view;

[0020] Figure 4 for Figure 1 A schematic diagram of the split bridge structure described in;

[0021] Figure 5 for Figure 4 CC section view;

[0022] Figure 6 is a top view of another embodiment of the split bridge structure;

[0023] Figure 7 for Figure 1 A left side view of the shearer body is shown;

[0024] Figure 8 It is a left view of another embodiment of the coal mining machine body.

[0025] Reference numerals:

[0026] 1. Split bridge structure of suspended body coal mining machine; 11. Middle box; 111. Upper positioning boss; 112. Lower positioning boss; 113. Bottom; 12. Left connecting block; 121. Left connecting ear; 13. Right connecting block; 131. Right connecting ear;

[0027] 2. Fix the reduction gearbox housing; 21. Positioning groove; 211. Upper groove wall; 212. Lower groove wall;

[0028] 3. front guide plate; 31. lower wear-resistant surface; 32. front wear-resistant surface; 33. front upper wear-resistant surface;

[0029] 4. Rear guide plate; 41. Rear upper wear-resistant surface; 42. Rear wear-resistant surface;

[0030] 51. Left positioning pin; 52. Right positioning pin;

[0031] 61. Long bolt; 62. Square nut;

[0032] 91. Support top beam; 92. Conveyor; 921. Guide structure. DETAILED DESCRIPTION

[0033] The present invention discloses a split bridge structure 1 of a suspended coal mining machine, such as Figure 1-8 As shown, it includes an intermediate box body 11 and a left connecting block 12 and a right connecting block 13 which are detachably fixed on the left and right sides of the intermediate box body, respectively. The intermediate box body and the left connecting block and the right connecting block are all positioned and connected, and the positioning method can be positioning by vertical end faces that fit each other and one or more positioning pins that vertically pass through the two end faces that fit each other. The front end face of the intermediate box body is provided with an upper positioning boss 111 and a lower positioning boss 112 that are horizontally protruding forward and extending left and right. The left connecting block (for example, the right front part of the left connecting block) and the right connecting block (for example, the left front part of the right connecting block) are respectively provided with a left connecting ear 121 and a right connecting ear 131 that extend forward horizontally, and the ear holes on the left connecting ear and the right connecting ear are both vertically arranged.

[0034] The upper positioning boss and the lower positioning boss are both used for positioning connection when the intermediate box is installed on the fixed reduction box housing 2 of the coal mining machine, and the left connecting ear and the right connecting ear are respectively used for positioning connection when the left connecting block and the right connecting block are installed on the fixed reduction box housing. In contrast, the support surface is longer and the force condition is better when the upper positioning boss and the lower positioning boss are positioned and connected, and the connection at the left connecting ear and the right connecting ear is relatively weak. When the connecting ear on one side is damaged, only the connecting block on the corresponding side needs to be replaced, and the intermediate box can still work reliably and will not be scrapped due to damage to the connecting ear on any side. Therefore, the service life is longer and the maintenance cost is significantly reduced.

[0035] In addition, when a wider conveyor 92 is required, the middle box can be kept unchanged and only the left and right connecting blocks and corresponding connecting parts can be replaced (see Figure 4 , 7 The structure shown is changed to Figure 6 , 8 The structure shown in the figure can be matched with a wider conveyor and have a longer production cycle.

[0036] The split bridge structure of the suspended body coal mining machine can be further optimized in one or more of the following aspects:

[0037] 1. The left connecting ear and the right connecting ear are preferably located in the middle of the left connecting block and the right connecting block in the height direction, and their upper and lower thicknesses are approximately 1 / 3 of the thickness of the left connecting block or the right connecting block.

[0038] 2. In the height direction, the upper positioning boss and the lower positioning boss are preferably close to the upper edge and the lower edge of the front end surface of the intermediate housing, respectively. When the intermediate housing is positioned and connected to the fixed reduction box housing, the stress points are dispersed and expanded outward, and the stress condition is better.

[0039] 3. The upper positioning boss and the lower positioning boss are preferably arranged along the entire left-right length of the front end surface of the intermediate box, so that the corresponding force can be shared at all places along the entire left-right length of the intermediate box, making the positioning connection structure more reliable.

[0040] 4. The left and right connecting blocks can be fixed to the intermediate box body by multiple groups of long bolts 61 extending in the left and right directions, and the long bolts penetrate the corresponding left and right connecting blocks. In this embodiment, the left and right connecting blocks are fixed to the intermediate box body by four groups of long bolts, and the four groups of long bolts are distributed in four positions, top, bottom, front and back. Multiple groups of rectangular grooves corresponding to the long screws can be respectively provided at the left and right ends of the intermediate box body, and the left and right connecting blocks are fixed to the intermediate box body by connecting square nuts 62 at the tail ends of the long bolts, and the square nuts are limited in the corresponding rectangular grooves.

[0041] 5. The rear bottom surface 113 of the intermediate box is preferably set to a horizontal plane, and the rear part is flat as a whole, that is, the thickness in the vertical direction is small, at least much smaller than the front part, so even if a wider conveyor is used, the coal passing space will not be affected. In addition, the middle bottom surface of the intermediate box can be set to a flat surface or an arched curved surface. When it is set to an arched curved surface, the coal passing space can be increased.

[0042] 6. The middle bottom surfaces of the left and right connecting blocks in the front-to-back direction are set to be arched surfaces to obtain a larger coal passing space.

[0043] 7. The electrical control system of the coal mining machine can be arranged in the middle box.

[0044] 8. The top surface of the split bridge structure of the suspended body coal mining machine is preferably an inclined plane with a high front and a low back. When the three machines are coordinated, it is convenient to maintain a sufficient gap between the coal mining machine body and the support top beam 91, thereby meeting the mining needs of undulating roof and floor plates, coal gangue, etc., and ensuring the smooth mining of extremely thin or thin coal seams in complex conditions such as coal rock.

[0045] The present invention also discloses a body of an ultra-thin coal seam coal mining machine, comprising a fixed reduction box housing 2, a bridge structure, a front guide plate 3 and a rear guide plate 4, wherein the bridge structure adopts the split bridge structure 1 of the suspended body coal mining machine. A positioning groove 21 is provided in the middle of the rear end face of the fixed reduction box housing, which is horizontally concave forward and extends left and right. A left groove and a right groove are provided on the left and right sides of the positioning groove, respectively, and a pin hole is provided in the left and right grooves, which passes through the fixed reduction box housing from top to bottom. The upper positioning boss and the lower positioning boss of the bridge structure are inserted into the positioning groove, and the upper plane of the upper positioning boss and the lower plane of the lower positioning boss form positioning matching surfaces with the upper groove wall 211 and the lower groove wall 212 of the positioning groove, respectively. The left connecting ear of the left connecting block and the right connecting ear of the right connecting block are respectively inserted into the left groove and the right groove, and the ear hole of the left connecting ear and the pin hole of the left groove are matched with the shaft hole of the left positioning pin 51 at the same time, and the ear hole of the right connecting ear and the pin hole of the right groove are matched with the shaft hole of the right positioning pin 52 at the same time. The rear end of the left connecting block is detachably fixedly connected to a pair of the front guide plate and the rear guide plate, and the rear end of the right connecting block is detachably fixedly connected to a pair of the front guide plate and the rear guide plate. The paired front guide plate and the rear guide plate are fitted front and back. The front guide plate is provided with a lower wear-resistant surface 31, a front wear-resistant surface 32 and a front upper wear-resistant surface 33, and the rear guide plate is provided with a rear upper wear-resistant surface 41 and a rear wear-resistant surface 42. The front upper wear-resistant surface and the rear upper wear-resistant surface constitute an upper wear-resistant surface, and the lower wear-resistant surface, the front wear-resistant surface, the upper wear-resistant surface and the rear wear-resistant surface are sequentially connected to form a groove structure with an open rear lower portion. The groove structure is used to slide with the guide structure 921 on the conveyor 92 to support and guide the machine body during the movement of the coal mining machine. The machine body of the ultra-thin coal seam coal mining machine is a suspended machine body. When the three machines are coordinated, the bridge structure is located above the conveyor, and the fixed reduction box housing is located above the front side of the conveyor.

[0046] The front guide plate and the fuselage, and the front guide plate and the rear guide plate can be positioned by end faces and pins. For example, the positioning end face area between the front guide plate and the fuselage is relatively large, and it is preferred to use one face and two pins for positioning.

[0047] Similarly, the left connecting block and the right connecting block can also be fixedly connected to the paired front guide plate and the rear guide plate by multiple groups of long bolts extending forward and backward. The long bolts penetrate the front guide plate and the rear guide plate. The left connecting block and the right connecting block are respectively provided with rectangular grooves, for example, at the rear. The front and rear guide plates are fixed to the left connecting block and the right connecting block by connecting square nuts at the tail ends of the long bolts. The square nuts are confined in the corresponding rectangular grooves.

[0048] When the upper positioning boss and the lower positioning boss are respectively close to the upper edge and the lower edge of the front end surface of the intermediate case body, the upper groove wall and the lower groove wall of the positioning groove are also correspondingly close to the upper edge and the lower edge of the rear end surface of the reduction gearbox housing, that is, the upper and lower widths of the positioning groove are wider. In this case, the left groove and the right groove are usually arranged to be connected with the left and right ends of the positioning groove.

[0049] The top surface of the front guide plate is preferably an inclined surface that is higher at the front and lower at the back, and is preferably coplanar with the top surface of the bridge structure.

[0050] The front and rear directions referred to in this article correspond to Figure 1 Up and down direction.

Claims

1. A body of an ultra-thin coal seam coal mining machine, characterized in that: The camshaft assembly comprises a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, each of which is provided with a plurality of movable members, The upper plane of the positioning boss and the lower plane of the lower positioning boss respectively form positioning matching surfaces with the upper groove wall and the lower groove wall of the positioning groove, the left connecting ear of the left connecting block and the right connecting ear of the right connecting block are respectively inserted into the left groove and the right groove, the ear hole of the left connecting ear and the pin hole of the left groove are simultaneously matched with the left positioning pin shaft hole, and the ear hole of the right connecting ear and the pin hole of the right groove are simultaneously matched with the right positioning pin shaft hole. The rear end of the left connecting block is detachably fixedly connected to a pair of the front guide plate and the rear guide plate, and the rear end of the right connecting block is detachably fixedly connected to a pair of the front guide plate and the rear guide plate, and the paired front guide plate and the rear guide plate are fitted front and back, the front guide plate is provided with a lower wear-resistant surface, a front wear-resistant surface and a front upper wear-resistant surface, the rear guide plate is provided with a rear upper wear-resistant surface and a rear wear-resistant surface, the front upper wear-resistant surface and the rear upper wear-resistant surface constitute an upper wear-resistant surface, and the lower wear-resistant surface, the front wear-resistant surface, the upper wear-resistant surface and the rear wear-resistant surface are sequentially connected to form a groove structure open at the rear lower part.

2. The ultra-thin coal seam mining machine body according to claim 1, characterized in that: In the height direction, the upper positioning boss and the lower positioning boss are respectively close to the upper edge and the lower edge of the front end surface of the middle box body.

3. The ultra-thin coal seam shearer body according to claim 1, characterized in that: The upper positioning boss and the lower positioning boss are arranged along the entire length of the front end surface of the intermediate box in the left-right direction.

4. The ultra-thin coal seam shearer body according to claim 1, characterized in that: The left connecting block and the right connecting block are fixed to the intermediate box body respectively by a plurality of groups of long bolts extending in the left and right directions, and the long bolts penetrate the corresponding left connecting block or right connecting block.

5. The ultra-thin coal seam shearer body according to claim 1, characterized in that: Its top surface is an inclined plane that is higher in the front and lower in the back.

6. The ultra-thin coal seam shearer body according to claim 1, 2, 3, 4 or 5, characterized in that: The rear bottom surface of the intermediate box is set as a horizontal plane, and the middle bottom surface is set as a horizontal plane or an arched curved surface. The thickness of the rear part of the intermediate box in the up-down direction is smaller than that of the front part.

7. The ultra-thin coal seam shearer body according to claim 1, 2, 3, 4 or 5, characterized in that: The middle bottom surfaces of the left connecting block and the right connecting block in the front-to-back direction are configured as arched curved surfaces.

8. The ultra-thin coal seam shearer body according to claim 1, 2, 3, 4 or 5, characterized in that: The left connecting block and the right connecting block are respectively fixedly connected to the paired front guide plate and the rear guide plate by multiple groups of long bolts extending forward and backward, and the long bolts penetrate the front guide plate and the rear guide plate. The left connecting block and the right connecting block are respectively provided with rectangular grooves, and the front and rear guide plates are fixed to the left connecting block and the right connecting block by connecting square nuts at the tail ends of the long bolts, and the square nuts are confined in the corresponding rectangular grooves.

9. The ultra-thin coal seam shearer body according to claim 6, characterized in that: The left connecting block and the right connecting block are respectively fixedly connected to the paired front guide plate and the rear guide plate by multiple groups of long bolts extending forward and backward, and the long bolts penetrate the front guide plate and the rear guide plate. The left connecting block and the right connecting block are respectively provided with rectangular grooves, and the front and rear guide plates are fixed to the left connecting block and the right connecting block by connecting square nuts at the tail ends of the long bolts, and the square nuts are confined in the corresponding rectangular grooves.

10. The ultra-thin coal seam shearer body according to claim 7, characterized in that: The left connecting block and the right connecting block are respectively fixedly connected to the paired front guide plate and the rear guide plate by multiple groups of long bolts extending forward and backward, and the long bolts penetrate the front guide plate and the rear guide plate. The left connecting block and the right connecting block are respectively provided with rectangular grooves, and the front and rear guide plates are fixed to the left connecting block and the right connecting block by connecting square nuts at the tail ends of the long bolts, and the square nuts are confined in the corresponding rectangular grooves.

11. The ultra-thin coal seam shearer body according to claim 8, characterized in that: The top surface of the front guide plate is an inclined surface which is higher at the front and lower at the back.

12. The ultra-thin coal seam shearer body according to claim 9, characterized in that: The top surface of the front guide plate is an inclined surface which is higher at the front and lower at the back.

13. The ultra-thin coal seam shearer body according to claim 10, characterized in that: The top surface of the front guide plate is an inclined surface which is higher at the front and lower at the back.

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