Thick coal seam shearer support assembly

Abstract

The present invention relates to a thick coal seam coal mining machine support assembly, belonging to the technical field of excavation equipment. The support assembly comprises: a machine leg, the machine leg is used to connect with the coal wall side of the coal mining machine body, the machine leg has a cavity with an opening facing downward; a support leg, the top of the support leg has a convex portion protruding upward, the convex portion extends from the opening of the machine leg into the cavity and is connected to the machine leg; a support shoe, the support shoe has a connection portion protruding upward, and the support shoe is rotatably connected to the bottom of the support leg through the connection portion. The main internal components of the present invention are welded parts, which reduces the weight of the whole machine and improves the traction weight ratio of the whole machine.

Description

Technical Field

[0001] The invention relates to the technical field of excavation equipment, and in particular to a thick coal seam coal mining machine support assembly. Background Art

[0002] my country has abundant coal reserves, and coal mining machines are the main equipment for mining coal in fully mechanized working faces. With the development of mining equipment technology, coal mining machines are increasingly moving towards large mining heights and high power. The installed power of coal mining machines abroad has reached a maximum of 3000kW, and the mining height has reached more than 7m. my country has huge reserves of thick and extra-thick coal seams, and the mining problem of such coal seams needs to be solved urgently, which requires the development of large mining height and high power coal mining machines.

[0003] The support assembly is installed on the coal wall side of the coal mining machine, riding on the scraper blade, playing the role of supporting and sliding forward. The support assembly is generally a two-stage type, consisting of a support frame and a support shoe. The support frame and the support shoe are mainly in the form of castings to meet the matching requirements. Since the height of the support assembly of the thick coal seam coal mining machine is about 1.5-2m, it is in the form of castings, which is relatively heavy, increasing the weight of the coal mining machine and reducing the traction weight ratio. Since the support frame casting needs to make a wooden mold and cast, the design, manufacturing and processing production cycle is as long as 3 months. The production cycle is long and cannot meet the current market's fast delivery cycle; different working face mining heights and different "three machines" supporting manufacturers, the support assembly must be changed according to the matching situation. Each time the support frame must manufacture a cast wooden mold, and it is produced in single or several pieces, and the production cost is high. With the increase of the mining height of the coal mining machine, the weight of the coal mining machine has also increased a lot. The weight of the coal mining machine with a mining height of 7m is about 180t, and the weight of the coal mining machine with a mining height of more than 8m is as high as about 220t. Therefore, the specific pressure of the coal mining machine support shoe is very large. Cast support shoes are prone to breakage between the two shovels of the scraper when the coal mining machine is running, affecting the mine's operating rate and reducing production capacity. In addition, since the support shoe in the support assembly is one of the vulnerable parts in the coal mining machine mechanical system, it is difficult to detect due to the serious tilt or roof fall in thick coal seams, and there is a certain degree of danger on the coal wall side. If the structural strength of the support assembly is not enough, it will increase the failure rate of the coal mining machine and affect the reputation of the company's products. Therefore, it is necessary to improve the reliability of the support assembly of the thick coal seam coal mining machine.

[0004] In view of this, there is an urgent need to design a coal mining machine support assembly that is suitable for thick coal seam working conditions in order to reduce weight, shorten production cycle, reduce costs and improve reliability. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned problems and provide a thick coal seam coal mining machine support assembly to reduce the weight of the whole machine and improve the traction-to-weight ratio of the whole machine.

[0006] The object of the present invention is achieved in that:

[0007] A thick coal seam shearer support assembly, comprising:

[0008] A machine leg, the machine leg is used to be connected to the coal wall side of the machine body of the coal mining machine, and the machine leg has a cavity with an opening facing downward;

[0009] A supporting leg, wherein the top of the supporting leg has a convex portion protruding upward, the convex portion extends from the opening of the leg into the cavity and is connected to the leg;

[0010] The supporting sliding shoe has a connecting portion protruding upward, and the supporting sliding shoe is rotatably connected to the bottom of the supporting leg through the connecting portion.

[0011] Preferably, a positioning column is provided on the top of the machine leg, and the positioning column is inserted into the positioning hole of the coal mining machine to achieve the positioning of the machine leg and the coal mining machine.

[0012] Preferably, the machine leg includes two main boards, two side sealing plates and a top sealing plate, the two side sealing plates are respectively connected between the front ends of the two main boards and between the rear ends of the two main boards, the top sealing plate is connected between the top ends of the two main boards, and the two main boards, the two side sealing plates and the top sealing plate enclose a cavity of the machine leg.

[0013] Preferably, the two main boards are symmetrical trapezoidal shapes, and the upper edges of the two main boards are longer than the lower edges of the two main boards.

[0014] Preferably, the positioning column is arranged on the top sealing plate, and the two main boards are provided with corresponding first connecting holes and second connecting holes, and the machine legs are connected to the side walls of the fuselage by means of a pin that passes through the first connecting holes in sequence, and the machine legs are also connected to the support legs by means of a pin that passes through the second connecting holes in sequence.

[0015] Preferably, the first connection holes are close to the upper edge of the main board and there are no less than two of them; the second connection holes are close to the lower edge of the main board and there are no less than two of them.

[0016] Preferably, the pin shaft is a stepped shaft.

[0017] Preferably, bushings are embedded in both the first connecting hole and the second connecting hole.

[0018] Preferably, a cover plate is provided on the first connection hole and the second connection hole located on the coal wall side of the body of the coal mining machine, and the cover plate is fixed to the main board by screw fasteners.

[0019] Preferably, a T-shaped pin is respectively provided on the two main boards, and the large ends of the two T-shaped pins are both located in the cavity and arranged opposite to each other; when the convex portion of the supporting leg extends into the cavity, the large ends of the two T-shaped pins respectively abut against the two sides of the top of the convex portion.

[0020] Preferably, a plurality of reinforcing ribs are provided on the opposite surfaces of the two main boards.

[0021] Preferably, the bottom of the support leg has a concave portion sunken inward from the bottom surface of the support leg, and the connecting portion of the support shoe extends from bottom to top into the concave portion and is rotatably connected to the machine leg.

[0022] Preferably, the support leg is formed by sequentially stacking and welding a first connecting plate, a second connecting plate and a third connecting plate;

[0023] The bottoms of the first connecting plates on both sides are flush with the bottom of the third connecting plate, and the bottom of the second connecting plate in the middle is higher than the bottom of the first connecting plate, thereby forming the concave portion;

[0024] The top of the first connecting plate is flush with the top of the second connecting plate, and the top of the third connecting plate is lower than the top of the second connecting plate, thereby forming the convex portion.

[0025] Preferably, the first connecting plate and the second connecting plate are respectively provided with first pin holes corresponding to the second connecting holes at the positions of the convex portions;

[0026] The first connecting plate and the third connecting plate are partially provided with corresponding second pin holes at the positions of the concave portions.

[0027] Preferably, a plurality of reinforcing ribs are provided between the top of the third connecting plate and the second connecting plate.

[0028] Preferably, the welding surfaces of the first connecting plate, the second connecting plate and the third connecting plate are all provided with breaches.

[0029] Preferably, a plurality of cylindrical pins penetrating the first connecting plate and the second connecting plate are welded on the supporting leg, and / or a plurality of cylindrical pins penetrating the first connecting plate, the second connecting plate and the third connecting plate are welded on the supporting leg.

[0030] Preferably, the supporting slide includes a base plate, and an upwardly protruding connecting portion is provided on the upper surface of the base plate along its length direction, and a through hole is opened on the connecting portion, and the through hole matches the second pin hole on the recessed portion of the supporting leg. After the connecting portion extends into the recessed portion, a pin shaft is used to penetrate the second pin hole and the through hole to realize the rotational connection between the supporting slide and the supporting leg.

[0031] Preferably, the maximum rotation angle between the supporting shoe and the supporting leg is ±6°.

[0032] Preferably, the horizontal cross-section of the bottom plate is a trapezoid, and the bottom surface of the bottom plate is tilted upward at both ends along its length direction.

[0033] Preferably, the upper surface of the bottom plate is in a V-shape that slopes downward from both ends to the middle.

[0034] Preferably, the connecting portion is triangular, and the top of the connecting portion has an arc.

[0035] The beneficial effects of the present invention are:

[0036] 1) The main internal components are welded, which reduces the weight of the whole machine and improves the traction-to-weight ratio of the whole machine;

[0037] 2) The welding structure is adopted to shorten the production cycle and reduce the production cost;

[0038] 3) The three-stage type is adopted, and only one of the components needs to be changed to meet the matching requirements, which improves adaptability, avoids the manufacturing cost of redesigning and producing the entire support leg, and increases the interchangeability of parts;

[0039] 4) The reliability of the support components is improved through reasonable structural design, such as box-type leg structure and positioning column structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A front view structural diagram of an embodiment of a thick coal seam shearer support assembly of the present invention is shown;

[0041] Figure 2 Shows Figure 1 A side cross-sectional view of

[0042] Figure 3 Shows Figure 1 Front view of the middle leg;

[0043] Figure 4 Shows Figure 3 A side cross-sectional view of

[0044] Figure 5 Shows Figure 1Front view of the middle supporting leg;

[0045] Figure 6 Shows Figure 5 A side cross-sectional view of

[0046] Figure 7 Shows Figure 1 Front view of the structure of the middle support shoe;

[0047] Figure 8 Shows Figure 7 Side cross-sectional view of .

[0048] Description of reference numerals:

[0049] Leg 1, cavity 11, positioning column 12, main board 13, side sealing plate 14, top sealing plate 15, first connecting hole 16, second connecting hole 17, cover plate 18, T-shaped pin 19

[0050] Support leg 2, first pin hole 21, first connecting plate 22, second connecting plate 23, third connecting plate 24, second pin hole 25, cylindrical pin 26, reinforcing rib 27

[0051] Supporting shoe 3, connecting portion 31, bottom plate 32, through hole 33 DETAILED DESCRIPTION

[0052] Various embodiments of the present invention will be described with reference to the accompanying drawings. In the specification and the accompanying drawings, elements with similar structures or functions will be represented by the same element symbols. It is understood that the accompanying drawings are only for reference and illustration purposes and are not intended to limit the present invention. The dimensions shown in the accompanying drawings are only for the convenience of clear description, and do not limit the proportional relationship or provide an exhaustive description of the present invention, nor do they limit the scope of the present invention.

[0053] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] like Figure 1 and Figure 2As shown, this embodiment provides a thick coal seam coal mining machine support assembly, which includes a machine leg 1, a support leg 2 and a support shoe 3. The machine leg 1 is used to connect with the coal wall side of the machine body of the coal mining machine, and the machine leg 1 has a cavity 11 with an opening facing downward. The top of the support leg 2 has an upwardly protruding convex portion, which extends from the opening of the machine leg 1 into the cavity 11 and is connected to the machine leg 1. The support shoe 3 has an upwardly protruding connecting portion 31, and the support shoe 3 is rotatably connected to the bottom of the support leg 2 through the connecting portion 31.

[0055] Preferably, a positioning column 12 is provided on the top of the machine leg 1, and the positioning column 12 is inserted into the positioning hole of the coal mining machine to realize the positioning of the machine leg 1 and the coal mining machine. The machine leg 1 and the coal mining machine are connected after positioning, so that the alignment during connection is easier to operate. Specifically, the structure of the positioning column 12 is a large-diameter round pin, and a positioning stop can be added to withstand part of the shear force in the horizontal and front-to-back directions.

[0056] Figure 3 and Figure 4 The structure of a specific embodiment of a machine leg 1 is shown. The machine leg 1 includes two main boards 13, two side sealing boards 14 and a top sealing board 15. The two main boards 13 are symmetrical trapezoidal (such as Figure 3 As shown, the front end face and the rear end face of the two main boards 13 are both inclined surfaces or most of them are inclined surfaces), and the upper edges of the two main boards 13 are longer than the lower edges of the two main boards 13. The main boards 13 with this structure can reduce the forward resistance of the coal mining machine during the working process of the working face. The two side sealing plates 14 are respectively connected between the front ends of the two main boards 13 and between the rear ends of the two main boards 13, that is, the two side sealing plates 14 are connected between the two inclined surfaces, and the two side sealing plates 14 are used to prevent large coal blocks from entering the cavity 11. The top sealing plate 15 is connected between the top ends of the two main boards 13, but is not connected to the sealing plates 14 on both sides, that is, there is a hollow part when viewed from top to bottom. The two main boards 13, the two side sealing plates 14 and the one top sealing plate 15 surround the cavity 11 of the aforementioned machine leg 1.

[0057] In order to enhance the overall strength of the leg 1 , a plurality of reinforcing ribs 27 are provided on the opposite surfaces of the two main boards 13 , for example, one horizontal and four vertical ribs are added to the main board 13 .

[0058] In this embodiment, the main board 13, the side sealing plates 14 and the top sealing plate 15 can be connected to each other by welding, and all of them are made of high-strength plates (such as Q690 steel plates).

[0059] When the machine leg 1 adopts the above structure, the positioning column 12 is arranged on the top sealing plate 15 .

[0060] Preferably, the machine leg 1 is connected to the coal mining machine through a pin shaft, so the two main boards 13 are provided with corresponding first connecting holes 16 and second connecting holes 17, and the machine leg 1 is connected to the side wall of the machine body by a pin shaft that penetrates the first connecting hole 16 in sequence, and the machine leg 1 is also connected to the support leg 2 by a pin shaft that penetrates the second connecting hole 17 in sequence.

[0061] In order to ensure a firm connection, preferably, the first connection holes 16 are close to the upper edge of the main board 13 and there are no less than two of them; the second connection holes 17 are close to the lower edge of the main board 13 and there are no less than two of them. In this embodiment, two first connection holes 16 and two second connection holes 17 are specifically used, and the two first connection holes 16 are close to the two corners of the upper edge of the main board 13, and the two second connection holes 17 are close to the two corners of the lower edge of the main board 13.

[0062] Preferably, the pin shaft used in this embodiment is a stepped shaft to facilitate the disassembly of the pin shaft and the overhaul of the coal mining machine components.

[0063] Preferably, bushings are embedded in the first connecting hole 16 and the second connecting hole 17 to improve the specific pressure strength of the first connecting hole 16 and the second connecting hole 17 and prevent extrusion deformation in the holes.

[0064] Preferably, a cover plate 18 is provided on the first connecting hole 16 and the second connecting hole 17 located on the coal wall side of the coal mining machine body, and the cover plate 18 is fixed to the main board 13 by screw fasteners. After the first connecting hole 16 and the second connecting hole 17 are inserted with the pin shaft, the cover plate 18 can play a role in axial positioning and protection of the pin shaft.

[0065] Preferably, the two main boards 13 are each provided with a T-shaped pin 19, and the large ends of the two T-shaped pins 19 are both located in the cavity 11 and are arranged opposite to each other. When the convex portion of the support leg 2 extends into the cavity 11, the large ends of the two T-shaped pins 19 abut against the top two sides of the convex portion. The T-shaped pin 19 can prevent the support leg 2 from spreading the machine leg 1 when the support shoe 3 is subjected to a large lateral force, that is, it can reduce the effect of the lateral force on the machine leg 1.

[0066] Figure 5 and Figure 6The specific embodiment structure of a support leg 2 is shown. The support leg 2 is formed by stacking and welding the first connecting plate 22, the second connecting plate 23 and the third connecting plate 24 in sequence, and the three connecting plates are all made of high-strength plates (such as A960 steel plates). The use of a welded structure instead of the original casting form can reduce the cost of wooden molds and shorten the production cycle. The bottom of the first connecting plate 22 located on both sides is flush with the bottom of the third connecting plate 24, and the bottom of the second connecting plate 23 located in the middle is higher than the bottom of the first connecting plate 22, thereby forming the concave portion. The top of the first connecting plate 22 is flush with the top of the second connecting plate 23, and the top of the third connecting plate 24 is lower than the top of the second connecting plate 23, thereby forming the convex portion. The convex portion extends from the opening of the leg 1 into the cavity 11 and is connected to the leg 1. The connecting portion 31 of the support shoe 3 extends from the bottom to the top into the concave portion and is rotatably connected to the leg 1. In other words, two ends of the support leg 2 are connected to the machine leg 1 and the support shoe 3 respectively.

[0067] The height and horizontal span of the support legs 2 in this embodiment are determined according to supporting requirements and are not limited here.

[0068] In order to achieve the connection between the support leg 2 and the machine leg 1, the first connecting plate 22 and the second connecting plate 23 are respectively provided with first pin holes 21 corresponding to the second connecting holes 17 at the positions of the convex parts. The number of the first pin holes 21 matches that of the second connecting holes 17.

[0069] In order to achieve the connection between the supporting leg 2 and the supporting shoe 3, corresponding second pin holes 25 are partially opened on the first connecting plate 22 and the third connecting plate 24 at the positions of the concave portion.

[0070] Preferably, in order to enhance the strength of the welding, the welding surfaces of the first connecting plate 22, the second connecting plate 23 and the third connecting plate 24 are all provided with breaks, and the shape of the breaks is not limited, and can be a J-shaped break or the like.

[0071] Preferably, the support leg 2 is welded with a plurality of cylindrical pins 26 penetrating the first connecting plate 22 and the second connecting plate 23, and / or the support leg 2 is welded with a plurality of cylindrical pins 26 penetrating the first connecting plate 22, the second connecting plate 23 and the third connecting plate 24. In other words, at the position where only the first connecting plate 22 and the second connecting plate 23 are superimposed and welded (such as Figure 5 At least one cylindrical pin 26 is passed through the upper part of the support leg 2 (as shown); at the position where the first connecting plate 22, the second connecting plate 23 and the third connecting plate 24 are superimposed and welded (as shown in FIG. Figure 5As shown in the figure, at least one cylindrical pin 26 is also passed through the lower part of the support leg 2. This arrangement can prevent the weld between the plates from cracking. In addition, in order to improve reliability, it can also be assisted in the form of reinforcing ribs 27, for example, a plurality of reinforcing ribs 27 are specifically provided between the top of the third connecting plate 24 and the second connecting plate 23.

[0072] Figure 7 and Figure 8 The figure shows a specific embodiment structure of a support shoe 3. The support shoe 3 includes a bottom plate 32, the bottom plate 32 has a certain thickness, and an upwardly protruding connection portion 31 is provided on the upper surface of the bottom plate 32 along its length direction. Preferably, the connection portion 31 is triangular, has a certain thickness, and the top of the connection portion 31 has an arc. A through hole 33 is provided on the connection portion 31 (specifically, the through hole 33 is close to the top of the connection portion 31), and the through hole 33 matches the second pin hole 25 on the concave portion. After the connection portion 31 extends into the concave portion, a pin shaft is used to penetrate the second pin hole 25 and the through hole 33 to realize the rotation connection between the support shoe 3 and the support leg 2 (specifically, the maximum angle of rotation between the support shoe 3 and the support leg 2 around the pin shaft is preferably ±6°). Since the thick coal seam shearer weighs about 200 tons, the support shoe 3 is easily broken between the two shovel plates of the scraper, and a forging structure is adopted, and a wear-resistant layer is preferably welded on the bottom plate 32 with a wear-resistant electrode to improve the wear resistance.

[0073] Preferably, the horizontal cross-section of the bottom plate 32 is a trapezoid, as shown in FIG. Figure 7 As shown, the front and rear end surfaces of the bottom plate 32 are inclined surfaces. After the support assembly is symmetrically installed on the thick coal seam coal mining machine, the longest sides (the bottom sides of the trapezoid) of the symmetrical bottom plate 32 are arranged relatively (equivalent to the longest side of the bottom plate 32 being located on the inside), thereby forming a coal guiding and drag reduction structure. The inclined surfaces at both ends allow the coal to flow to the coal wall side during the coal mining machine's advancement, thereby reducing the forward resistance. The bottom surface of the bottom plate 32 is tilted upward at both ends along its length direction (that is, the bottom surfaces at both ends of the bottom plate 32 are inclined surfaces), which can prevent the support shoe 3 from getting stuck due to ups and downs when walking between the two sections of the scraper chute shoveling coal plates. Preferably, the upper surface of the bottom plate 32 is in a V-shape that tilts downward from both ends to the middle.

[0074] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A thick coal seam shearer support assembly, characterized in that: include: The two cams have a first end, a second end, and a second end, wherein the two cams have a first end, and the second end is engaged with the first and second ends of the two cams, and the two cams have a second end, wherein the two cams have a first end, and the second end is engaged with the first and second ends of the two cams, and the two cams have a second end. A support leg, wherein the top of the support leg has a convex portion protruding upward, the convex portion extends from the opening of the machine leg into the cavity and is connected to the machine leg; the support leg is formed by sequentially stacking and welding a first connecting plate, a second connecting plate and a third connecting plate; the first connecting plate and the second connecting plate are respectively provided with first pin holes corresponding to the second connecting holes at the positions of the convex portion; the machine leg is connected to the support leg by sequentially passing through the second connecting holes and the support leg through a pin shaft; when the convex portion of the support leg extends into the cavity, the large ends of the two T-shaped pins are respectively abutted against the two sides of the top of the convex portion; A supporting shoe, wherein the supporting shoe has a connecting portion protruding upward, and the supporting shoe is rotatably connected to the bottom of the supporting leg through the connecting portion; the bottom of the supporting leg has a concave portion sunken inwardly from the bottom surface of the supporting leg, and the connecting portion of the supporting shoe extends from bottom to top into the concave portion and is rotatably connected to the machine leg; the bottom of the first connecting plate located on both sides is flush with the bottom of the third connecting plate, and the bottom of the second connecting plate located in the middle is higher than the bottom of the first connecting plate, thereby forming the concave portion; the top of the first connecting plate is flush with the top of the second connecting plate, and the top of the third connecting plate is lower than the top of the second connecting plate, thereby forming the convex portion; the first connecting plate and the third connecting plate are partially provided with corresponding penetrating second pin holes at the position of the concave portion.

2. The thick coal seam shearer support assembly according to claim 1, characterized in that: A positioning column is provided on the top of the machine leg, and the positioning column is inserted into the positioning hole of the coal mining machine to achieve the positioning of the machine leg and the coal mining machine.

3. The thick coal seam shearer support assembly according to claim 2, characterized in that: The first connection holes are close to the upper edge of the main board and are not less than two; the second connection holes are close to the lower edge of the main board and are not less than two.

4. The thick coal seam shearer support assembly according to claim 2, characterized in that: The pin shaft is a stepped shaft.

5. The thick coal seam shearer support assembly according to claim 2, characterized in that: Bushings are inlaid in the first connecting hole and the second connecting hole.

6. The thick coal seam shearer support assembly according to claim 2, characterized in that: The first connection hole and the second connection hole located on the coal wall side of the coal mining machine are both provided with a cover plate, and the cover plate is fixed to the main board by screw fasteners.

7. The thick coal seam shearer support assembly according to claim 2, characterized in that: A plurality of reinforcing ribs are arranged on the opposite surfaces of the two main boards.

8. The thick coal seam shearer support assembly according to claim 2, characterized in that: A plurality of reinforcing ribs are provided between the top of the third connecting plate and the second connecting plate.

9. The thick coal seam shearer support assembly according to claim 2, characterized in that: The welding surfaces of the first connecting plate, the second connecting plate and the third connecting plate are all provided with breaches.

10. The thick coal seam shearer support assembly according to claim 9, characterized in that: A plurality of cylindrical pins penetrating the first connecting plate and the second connecting plate are welded on the supporting leg, and / or a plurality of cylindrical pins penetrating the first connecting plate, the second connecting plate and the third connecting plate are welded on the supporting leg.

11. The thick coal seam shearer support assembly according to claim 2, characterized in that: The supporting slide shoe includes a base plate, and an upwardly protruding connecting portion is provided on the upper surface of the base plate along its length direction. A through hole is opened on the connecting portion, and the through hole matches the second pin hole on the recessed portion of the supporting leg. After the connecting portion extends into the recessed portion, a pin shaft is used to penetrate the second pin hole and the through hole to realize the rotational connection between the supporting slide shoe and the supporting leg.

12. The thick coal seam shearer support assembly according to claim 1 or 11, characterized in that: The maximum rotation angle between the supporting shoe and the supporting leg is ±6°.

13. The thick coal seam shearer support assembly according to claim 11, characterized in that: The horizontal cross section of the bottom plate is a trapezoid, and the bottom surface of the bottom plate is tilted upward along both ends of its length direction.

14. The thick coal seam shearer support assembly according to claim 13, characterized in that: The upper surface of the bottom plate is in a V shape that slopes downward from both ends to the middle.

15. The thick coal seam shearer support assembly according to claim 13, characterized in that: The connecting portion is triangular in shape, and the top of the connecting portion has an arc.

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