Detachable bottom adjusting device for top coal caving end support

Abstract

The invention relates to the technical field of hydraulic supports, in particular to a detachable bottom adjusting device for a top coal caving end support which comprises a support base. The detachable bottom adjusting device comprises a connecting seat and a bottom adjusting oil cylinder; the connecting seat is detachably connected with the bracket base; the bottom adjusting oil cylinder is in sliding connection with the connecting seat; one end of the bottom adjusting oil cylinder is clamped with the connecting seat, and the other end of the bottom adjusting oil cylinder abuts against a preset transfer mechanism; the support base can move linearly in the first direction. And the transshipment mechanism can apply a counter-acting force to the bottom adjusting oil cylinder, so that the top coal caving end bracket is aligned to the first direction. The connecting base and the bottom adjusting oil cylinder can be detached from the support base, the bottom adjusting oil cylinder can be detached from the connecting base, an operator can take out the bottom adjusting oil cylinder under the condition that the operator does not exit from the transfer mechanism, and the maintenance labor intensity is reduced. The end face of the telescopic rod of the bottom adjusting oil cylinder abuts against the inner wall face of the connecting base in a face-to-face mode, transmission stability is high, and the service life of the bottom adjusting oil cylinder is effectively prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic supports, and in particular to a detachable bottom adjustment device for a top coal caving end support. Background Art

[0002] The top coal caving end bracket is applied to the head part of the fully mechanized mining face (also known as the equipment transportation tunnel), and is used to support the tunnel roof (including anchor nets, anchor rods, anchor cables, etc.) to maintain the stability and safety of the tunnel and maintain a safe working space. Usually, a pair of top coal caving end brackets are set on both sides of the base plate; a fully mechanized mining face transfer machine is set on the inner side of a pair of top coal caving end brackets; the front and rear transport mechanisms of the fully mechanized mining face conveyor are suspended on the upper ends of the front and rear bases of the top coal caving end brackets, respectively. Therefore, it is required that no device protruding from the base plane can be installed on the front and rear bases to avoid interference with the front and rear transport mechanisms.

[0003] In the prior art, see Figure 1 In order to enable the top coal caving end bracket to be moved smoothly and quickly in a straight line, the bottom adjustment cylinder (3) of the top coal caving end bracket is embedded in the base (1), one end of the bottom adjustment cylinder (3) abuts against the inner wall of the base (1), and the other end abuts against the transfer mechanism (6). The force-bearing surface of the bottom adjustment cylinder (3) is the contact force-bearing surface (31), and the transmission stability is relatively strong. However, once the bottom adjustment cylinder (3) of this structure is damaged, the bottom adjustment cylinder (3) can only be withdrawn from the side of the base (1) toward the transfer mechanism (6), and the transfer mechanism (6) needs to be completely withdrawn from the top coal caving end bracket before withdrawal, which is relatively difficult to dismantle and repair.

[0004] In the prior art 2, see Figure 2 Compared with the prior art 1, the base (1) is detachably connected with a pin shaft (32), the bottom adjustment cylinder (3) is connected to the base (1) through the pin shaft (32), and the bottom adjustment cylinder (3) is stressed through the pin shaft (32). The bottom adjustment cylinder (3) of the prior art 2 can be pulled out from both sides of the base (1), and it is more convenient to disassemble and assemble the bottom adjustment cylinder (3) from the side of the base (1) away from the transfer mechanism (6). However, due to structural limitations, the pin shaft (32) is generally designed to have a diameter of φ30 to φ50 mm, which makes the pin shaft (32) more prone to breakage and bending deformation during use, and has a shorter service life. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a detachable bottom adjustment device for a top coal caving end support, which solves the technical problem that the bottom adjustment cylinder of the existing top coal caving end support is difficult to have the characteristics of easy disassembly and assembly and long service life at the same time.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the present invention provides a detachable bottom adjustment device for a top coal caving end support, wherein the top coal caving end support comprises a support base; the detachable bottom adjustment device comprises a connecting seat and a bottom adjustment cylinder;

[0009] The connecting seat is built into the bracket base, and the two are detachably connected;

[0010] The bottom adjustment oil cylinder is slidably connected to the connecting seat; one end of the bottom adjustment oil cylinder is in surface contact with the connecting seat, and the other end is in surface contact with a preset transfer mechanism;

[0011] Wherein, the support base can be linearly moved along the first direction; the transfer mechanism can apply a reaction force to the bottom adjustment cylinder to adjust the top coal caving end support to the first direction.

[0012] Optionally, the bottom adjustment cylinder includes a housing, a telescopic rod, a first pin and a limiting ring;

[0013] The housing abuts against the transfer mechanism;

[0014] The connecting seat is provided with a through hole; the telescopic rod is slidably connected with the through hole;

[0015] The limiting ring is coaxially arranged on the telescopic rod; the limiting ring abuts against the inner wall of the through hole, and the first pin abuts against the outer wall of the through hole.

[0016] Optionally, in the adjustment state, the force-bearing surface of the bottom adjustment cylinder relative to the connecting seat is the side of the limit ring facing the through hole.

[0017] Optionally, a pair of clamping plates are provided at the bottom end of the connecting seat;

[0018] A pair of card slots are provided on the bracket base; a pair of card plates and a pair of card slots are plugged in one-to-one correspondence;

[0019] A connecting shaft is coaxially arranged along the axial direction of the bottom adjustment cylinder; one end of the connecting shaft passes through an inner clamping plate and is connected to the inner wall of the bracket base; the other end of the connecting shaft passes through another outer clamping plate and is connected to the outer wall of the bracket base through a second pin shaft; the second pin shaft abuts against the outer wall of the bracket base.

[0020] Optionally, the connecting shaft includes a first connecting shaft and a second connecting shaft that are mirror-arranged; one end of the first connecting shaft is connected to one end of the middle part of the bracket base, and the other end of the second connecting shaft passes through a clamping plate and the outer wall of the bracket base and is connected to the second pin shaft.

[0021] Optionally, in the adjusted state, the force-bearing surface of the connecting seat relative to the bracket base is the end surface of the clamping plate.

[0022] Optionally, the top coal caving end support further includes a base plate;

[0023] A pair of the support bases are arranged one by one on both sides of the substrate; the transfer mechanism is arranged on the substrate;

[0024] The detachable bottom adjustment device is arranged on the support base at one side, and the transfer mechanism is arranged close to the detachable bottom adjustment device;

[0025] A preset transport mechanism is suspended above the support base on the other side.

[0026] Optionally, the transfer mechanism includes a transfer machine and a base;

[0027] The transfer machine is arranged on the base;

[0028] The bottom adjustment oil cylinder can abut against the base.

[0029] (III) Beneficial effects

[0030] The beneficial effects of the present invention are:

[0031] The connecting seat is detachably connected to the support base, so that the connecting seat and the bottom adjustment cylinder can be removed from the support base. In addition, one end of the bottom adjustment cylinder abuts against the connecting seat surface, and the other end abuts against the preset transfer mechanism, so that the bottom adjustment cylinder can be removed from the connecting seat. The operator can take out the bottom adjustment cylinder without exiting the transfer mechanism, which greatly reduces the maintenance labor intensity and improves the maintenance efficiency.

[0032] The bottom adjustment cylinder is in surface-to-surface contact with the connecting seat, that is, the end face of the telescopic rod of the bottom adjustment cylinder is in surface-to-surface contact with the inner wall surface of the connecting seat. Compared with the pin shaft transmission method, the surface-to-surface contact method has a larger force area and stronger transmission stability. Therefore, it can effectively extend the service life of the bottom adjustment cylinder and realize the integration of the characteristics of easier disassembly and assembly and longer service life of the bottom adjustment cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the bottom adjustment cylinder of the top coal caving end support of the prior art 1;

[0034] Figure 2 It is a structural schematic diagram of the bottom adjustment cylinder of the top coal caving end support of the prior art II;

[0035] Figure 3 It is a front view of the detachable bottom adjustment device for the top coal caving end support of the present invention;

[0036] Figure 4 It is a side view of the detachable bottom adjustment device for the top coal caving end support of the present invention;

[0037] Figure 5 It is a top view of the detachable bottom adjustment device for the top coal caving end support of the present invention.

[0038] [Description of Reference Numerals]

[0039] 1: bracket base; 2: connecting seat; 3: bottom adjustment cylinder; 31: contact force surface; 32: pin shaft; 4: connecting shaft; 5: first pin shaft; 51: first force surface; 6: transfer mechanism; 7: transportation mechanism; 8: limit ring; 9: clamping plate; 91: second force surface; 10: second pin shaft. DETAILED DESCRIPTION

[0040] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] See also Figure 3 and Figure 4The present invention provides a detachable bottom adjustment device for a top coal caving end support, the top coal caving end support comprises a support base 1; it is characterized in that the detachable bottom adjustment device comprises a connecting seat 2 and a bottom adjustment cylinder 3; the connecting seat 2 is built into the support base 1, and the two are detachably connected; the bottom adjustment cylinder 3 is slidably connected to the connecting seat 2; one end of the bottom adjustment cylinder 3 is in surface contact with the connecting seat 2, and the other end is in contact with a preset transfer mechanism 6; wherein the support base 1 can be linearly moved along a first direction; the transfer mechanism 6 can apply a reaction force to the bottom adjustment cylinder 3, so that the top coal caving end support is adjusted to the first direction. The first direction is the excavation direction of the underground tunnel, which is also the length direction of the support base 1 in this embodiment.

[0045] The connecting seat 2 is detachably connected to the support base 1, so that the connecting seat 2 and the bottom adjustment cylinder 3 can be removed from the support base 1. In addition, one end of the bottom adjustment cylinder 3 abuts against the connecting seat 2, and the other end abuts against the preset transfer mechanism 6, so that the bottom adjustment cylinder 3 can be removed from the connecting seat 2. The operator can take out the bottom adjustment cylinder 3 without withdrawing the transfer mechanism 6, which greatly reduces the maintenance labor intensity and improves the maintenance efficiency.

[0046] The transfer mechanism 6 can apply a reaction force to the bottom adjustment cylinder 3 to adjust the top coal caving end support to the first direction. The bottom adjustment cylinder 3 can give a thrust to the transfer mechanism 6 by extension and contraction, so the transfer mechanism 6 can apply a reaction force to the bottom adjustment cylinder 3, and the top coal caving end support is adjusted by the reaction force, and finally adjusted to the first direction, thereby improving the movement accuracy of the top coal caving end support along the first direction of the linear movement frame, and ensuring the support efficiency and strength of the top coal caving end support.

[0047] The bottom adjusting oil cylinder 3 is in surface-to-surface contact with the connecting seat 2, that is, the end face of the telescopic rod of the bottom adjusting oil cylinder 3 is in surface-to-surface contact with the inner wall surface of the connecting seat 2. Compared with the transmission method of the pin shaft 32, the surface-to-surface contact method has a larger force area and stronger transmission stability. Therefore, it can effectively extend the service life of the bottom adjusting oil cylinder 3 and realize the integration of the characteristics of easier disassembly and assembly and longer service life of the bottom adjusting oil cylinder 3.

[0048] It should be noted that if Figure 5 As shown, the present invention is different from the traditional method of arranging the transfer mechanism 6 and the transportation mechanism 7 on both sides of the substrate. Figure 5Taking the position shown as an example, the upper and lower sides of the transfer mechanism 6 are both provided with a support base 1, and a detachable bottom adjustment device is installed on the support base 1 on the lower side. The transport mechanism 7 is suspended above the detachable bottom adjustment device on the upper side, and the transfer mechanism 6 is arranged on the base of the transfer mechanism 6 close to the detachable bottom adjustment device below. Compared with the traditional installation method of symmetrical arrangement of the upper and lower sides, the present invention adopts an asymmetrical arrangement method, wherein the transport mechanism 7 is arranged on the upper support base 1 without the detachable bottom adjustment device installed, and the transfer mechanism 6 is arranged on the lower support base 1 with the detachable bottom adjustment device installed, which can not only ensure that the top coal caving end support is operated on the working surface on one side of the tunnel, but also ensure that no protruding structure is arranged under the transport mechanism 7, which meets the use requirements of the equipment and improves the reliability of the equipment. When it is necessary to operate on the working surface on the other side of the tunnel, the transfer mechanism 6, the transport mechanism 7 and the detachable bottom adjustment device can be reversed in direction, which is flexible to use, and the front and rear working surfaces can be interchanged, making the adaptability of the top coal caving end support more extensive.

[0049] Furthermore, the bottom adjustment oil cylinder 3 includes a shell, a telescopic rod, a first pin 5 and a limit ring 8; the shell is in contact with the transfer mechanism 6; a through hole is provided on the connecting seat 2; the telescopic rod is slidably connected with the through hole; a limit ring 8 is coaxially arranged on the telescopic rod; the limit ring 8 is in contact with the inner wall of the through hole, and the first pin 5 is in contact with the outer wall of the through hole. Compared with the way that the end face of the telescopic rod is in contact with the inner wall of the connecting seat 2, a limit ring 8 is arranged on the telescopic rod, and the side of the limit ring 8 facing the through hole is a plane, so as to achieve the surface contact between the limit ring 8 and the through hole, improve the limiting strength and transmission stability, and extend the service life of the bottom adjustment oil cylinder 3; the first pin 5 is inserted into one end of the telescopic rod passing through the through hole, and the through hole is engaged between the first pin 5 and the limit ring 8, so as to achieve the movement limit of the telescopic rod in its axial direction. The first pin shaft 5 enables the telescopic rod to be detachably connected to the connecting seat 2. During actual operation, the connecting seat 2 is first removed from the bracket base 1. After removing the first pin shaft 5, the remaining components of the bottom adjustment cylinder 3 can be removed together at one end of the connecting seat 2 mounting shell, thereby improving the convenience of disassembly and assembly of the detachable bottom adjustment device in the event of an underground fault, reducing the labor intensity of maintenance, and improving the efficiency of maintenance operations.

[0050] Furthermore, in the adjusted state, the force-bearing surface of the bottom adjustment cylinder 3 relative to the connecting seat 2 is the side of the limit ring 8 facing the through hole, that is, the first force-bearing surface 51, and the first pin shaft 5 is not subjected to force. The face-to-face abutment method has strong transmission stability, which can effectively extend the service life of the bottom adjustment cylinder 3 and reduce the maintenance frequency of the bottom adjustment cylinder 3. During the movement of the top coal caving end support, when the support is skewed, the bottom adjustment cylinder 3 is supplied with liquid through the electric control main valve and the connecting hose, the telescopic rod is extended and the shell is pushed to move, and the shell presses the transfer mechanism 6, and the pressing force is also the thrust F, F=P·S, where P is the pressure of the pump station of the comprehensive mining working face, and S is the area of ​​the bottom adjustment cylinder 3). The transfer mechanism 6 then applies a reaction force to the shell, and the adjustment of the top coal caving end support is achieved through the reaction force, the movement accuracy of the top coal caving end support during the linear movement of the top coal caving end support is improved, and the support strength of the top coal caving end support is improved. Of course, it is also possible to adjust it through the detachable bottom adjustment device after the top coal caving end support completes the linear movement.

[0051] Secondly, a pair of clamping plates 9 are provided at the bottom end of the connecting seat 2; a pair of clamping slots are provided on the bracket base 1; the pair of clamping plates 9 and the pair of clamping slots are plugged in one-to-one correspondence; a connecting shaft 4 is coaxially provided along the axial direction of the bottom adjustment cylinder 3; one end of the connecting shaft 4 passes through an inner clamping plate 9 and is connected to the inner wall of the bracket base 1; the other end of the connecting shaft 4 passes through another outer clamping plate 9 and is connected to the outer wall of the bracket base 1 through a second pin 10; the second pin 10 abuts against the outer wall of the bracket base 1. Specifically, the clamping slot can limit the clamping plate 9 in the horizontal direction, and transmits through the face-to-face abutment method, so as to share the reaction force for the limit ring 8, further extend the service life of the bottom adjustment cylinder 3, and improve the reliability of the equipment. After the second pin 10 is disassembled, the connecting shaft 4 can be disassembled, and then the connecting seat 2 can be disassembled from the bracket base 1. Compared with the method of taking out the bottom adjustment cylinder 3 from the right side of the support base 1, it is more convenient to take out the connecting shaft 4 from the right side of the support base 1, which improves the convenience of disassembly and assembly of the bottom adjustment cylinder 3 when it fails downhole.

[0052] Furthermore, the connecting shaft 4 includes a first connecting shaft and a second connecting shaft which are arranged in a mirror image; one end of the first connecting shaft is connected to one end of the middle part of the support base 1, and the other end of the second connecting shaft passes through a card plate 9 and the outer wall of the support base 1 and is connected to the second pin 10; one end of the second connecting shaft is connected to the other end of the middle part of the support base 1, and the other end of the second connecting shaft passes through another card plate 9 and the inner wall of the support base 1 and is connected to the third pin. Among them, the middle part of the support base 1 refers to the square block structure formed between a pair of card plates 9 on the support base 1. By arranging the connecting shaft 4 in sections, the length of the connecting shaft 4 is reduced; the first connecting shaft and the second connecting shaft are arranged in a mirror image, and can be removed from the inner and outer sides of the support base 1 accordingly. Even if the bottom adjustment cylinder 3 fails underground, it is convenient to remove the connecting shaft 4 from the support base 1, and then it is convenient to disassemble the connecting seat 2, which improves the convenience of disassembly and assembly of the connecting shaft 4.

[0053] Secondly, in the adjusted state, the force-bearing surface of the connection seat 2 relative to the bracket base 1 is the end surface of the clamping plate 9, that is, the second force-bearing surface 91, and the connection shaft 4 is not subjected to force. Similarly, the end surface of the clamping plate 9 is in surface contact with the clamping groove. On the one hand, the clamping plate 9 expands the force-bearing surface of the connection seat 2 and the bracket base 1, and improves the structural strength of the connection seat 2; on the other hand, the clamping plate 9 can share the reaction force on the limit ring 8, and improve the reliability of the use of the detachable bottom adjustment device.

[0054] like Figure 5 As shown, the top coal caving end support also includes a base plate (not shown); a pair of support bases 1 are arranged one by one on both sides of the base plate; a transfer mechanism 6 is arranged on the base plate; a detachable bottom adjustment device is arranged on the support base 1 on one side, and the transfer mechanism 6 is arranged close to the detachable bottom adjustment device; a preset transportation mechanism 7 is suspended above the support base 1 on the other side. Compared with the traditional method of mirror-arranging the transfer mechanism 6 and the transportation mechanism 7 on both sides of the base plate, the present invention arranges the transportation mechanism 7 only on one side and only arranges the transfer mechanism 6 on the other side. Since the transportation mechanism 7 is not arranged on the side where the transfer mechanism 6 is arranged, that is, the transportation mechanism 7 is not suspended above the support base 1 on this side, a protruding structure can be arranged on the support base 1 on this side, that is, a detachable bottom adjustment device is arranged. By arranging the transportation mechanism 7 on one side and arranging the transfer mechanism 6 and the detachable bottom adjustment device on the other side, the side-by-side arrangement method enables the detachable bottom adjustment device to adjust the top coal caving end support on the corresponding side, while not affecting the normal use of the transfer mechanism 6 and the transportation mechanism 7. When it is necessary to operate on another working surface, the positions of the detachable bottom adjustment device, the transfer mechanism 6 and the transportation mechanism 7 can be adjusted accordingly. It is easy to disassemble and assemble and is flexible to use. While ensuring the accuracy of the linear movement of the top coal caving end bracket, it can also be flexibly disassembled and repaired when the detachable bottom adjustment device fails.

[0055] Secondly, the transfer mechanism 6 includes a transfer machine and a base; the transfer machine is arranged on the base; and the bottom adjustment cylinder 3 can abut against the base. Figure 5 Taking the position shown as an example, the base is arranged on the base plate, and the transfer mechanism 6 can be installed on the upper side or the lower side of the base plate, which is convenient for the flexible disassembly and assembly of the transfer mechanism 6 on the base plate. In addition, the bottom adjustment cylinder 3 is in contact with the base plate, and no longer directly in contact with the transfer mechanism 6 itself. The structural strength of the base is higher than that of the transfer mechanism 6, which effectively improves the transmission stability of the detachable bottom adjustment device and ensures the adjustment accuracy of the top coal caving end bracket.

[0056] The detachable bottom adjustment device can be freely installed and used according to the needs of the working surface. The setting of the detachable bottom adjustment device can not only reduce the workload of workers' manual intervention, but also ensure the support efficiency of the tunnel support and improve the safety of the safety passage. The detachable bottom adjustment device has low cost and simple operation.

[0057] It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific implementation methods. Any changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. A detachable bottom adjustment device for a top coal caving end support, the top coal caving end support comprising a support base (1); characterized in that: The detachable bottom adjustment device comprises a connecting seat (2) and a bottom adjustment cylinder (3); The connecting seat (2) is built into the bracket base (1), and the two are detachably connected; The bottom adjustment oil cylinder (3) is slidably connected to the connecting seat (2); one end of the bottom adjustment oil cylinder (3) is in surface contact with the connecting seat (2), and the other end is in surface contact with a preset transfer mechanism (6); The support base (1) is capable of linearly moving along a first direction; the transfer mechanism (6) is capable of applying a reaction force to the bottom adjustment cylinder (3) so as to adjust the top coal caving end support to the first direction.

2. The detachable bottom adjustment device for the top coal caving end support according to claim 1 is characterized in that: The bottom adjustment oil cylinder (3) comprises a housing, a telescopic rod, a first pin shaft (5) and a limiting ring (8); The housing is in abutment with the transfer mechanism (6); The connecting seat (2) is provided with a through hole; the telescopic rod is slidably connected to the through hole; The limiting ring (8) is coaxially arranged on the telescopic rod; the limiting ring (8) abuts against the inner wall of the through hole, and the first pin shaft (5) abuts against the outer wall of the through hole.

3. The detachable bottom adjustment device for the top coal caving end support according to claim 2 is characterized in that: In the adjusted state, the force-bearing surface of the bottom adjustment oil cylinder (3) relative to the connecting seat (2) is the side of the limit ring (8) facing the through hole.

4. The detachable bottom adjustment device for the top coal caving end support according to any one of claims 1 to 3, characterized in that: A pair of clamping plates (9) are provided at the bottom end of the connecting seat (2); A pair of card slots are provided on the bracket base (1); a pair of card plates (9) are plugged into the pair of card slots in a one-to-one correspondence; A connecting shaft (4) is coaxially arranged along the axial direction of the bottom adjustment cylinder (3); one end of the connecting shaft (4) passes through an inner clamping plate (9) and is connected to the inner wall of the support base (1); the other end of the connecting shaft (4) passes through another outer clamping plate (9) and is connected to the outer wall of the support base (1) via a second pin shaft (10); the second pin shaft (10) abuts against the outer wall of the support base (1).

5. The detachable bottom adjustment device for top coal caving end support according to claim 4 is characterized in that: The connecting shaft (4) comprises a first connecting shaft and a second connecting shaft which are arranged in a mirror image; One end of the first connecting shaft is connected to one end of the middle part of the bracket base (1), and the other end of the second connecting shaft passes through the clamping plate (9) and the outer wall of the bracket base (1) and is connected to the second pin shaft (10).

6. The detachable bottom adjustment device for top coal caving end support according to claim 4, characterized in that: In the adjusted state, the force-bearing surface of the connecting seat (2) relative to the bracket base (1) is the end surface of the clamping plate (9).

7. The detachable bottom adjustment device for the top coal caving end support according to any one of claims 1 to 3, characterized in that: The top coal caving end support also includes a base plate; A pair of the support bases (1) are arranged one by one on both sides of the substrate; the transfer mechanism (6) is arranged on the substrate; The detachable bottom adjustment device is arranged on the support base (1) on one side, and the transfer mechanism (6) is arranged close to the detachable bottom adjustment device; A preset transport mechanism (7) is suspended above the support base (1) on the other side.

8. The detachable bottom adjustment device for top coal caving end support according to claim 7, characterized in that: The transfer mechanism (6) comprises a transfer machine and a base; The transfer machine is arranged on the base; The bottom adjustment oil cylinder (3) can abut against the base.

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