Detachable bottom adjusting device for top coal caving end support

Abstract

The utility model 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 utility model relates to hydraulic support technical field, concretely relates to a detachable bottom adjusting device for top coal caving end support. BACKGROUND

[0002] The top coal caving end support is applied to the machine head part (also can be called equipment transportation roadway) of the fully mechanized coal mining face, is used to support the roadway roof (including anchor net, anchor rod, anchor cable etc.), to maintain the stability and safety of the roadway, and plays the purpose of maintaining the safety operation space.Usually, a pair of top coal caving end supports are arranged on the two sides of the base plate; the inner side of the pair of top coal caving end supports is provided with a fully mechanized coal mining face transfer machine; the front and rear transport mechanisms of the fully mechanized coal mining face conveyor are respectively suspended on the upper end of the front and rear bases of the top coal caving end support. Therefore, no device protruding from the plane of the base can be installed on the front and rear bases to avoid interference with the front and rear transport mechanisms.

[0003] In the prior art one, see Figure 1 , in order to enable the top coal caving end support to be smoothly and rapidly linearly moved, the bottom adjusting oil cylinder (3) of the top coal caving end support is embedded in the base (1), one end of the bottom adjusting oil cylinder (3) abuts against the inner wall of the base (1), the other end abuts against the transfer mechanism (6), the stress surface of the bottom adjusting oil cylinder (3) is a contact stress surface (31), and the transmission stability is relatively strong. However, once the bottom adjusting oil cylinder (3) is damaged, the bottom adjusting oil cylinder (3) can only be pulled out from the side of the base (1) facing the transfer mechanism (6), and before being pulled out, the transfer mechanism (6) needs to be completely withdrawn from the top coal caving end support, which is relatively difficult in terms of disassembly and maintenance.

[0004] In the prior art two, see Figure 2 , compared with the prior art one, the base (1) is detachably connected with a pin shaft (32), the bottom adjusting oil cylinder (3) is connected with the base (1) through the pin shaft (32), and the bottom adjusting oil cylinder (3) is stressed through the pin shaft (32). The bottom adjusting oil cylinder (3) of the prior art two can be pulled out from the two sides of the base (1), and the bottom adjusting oil cylinder (3) is relatively convenient to disassemble and assemble from the side of the base (1) away from the transfer mechanism (6). However, due to the structural limitation, the pin shaft (32) is generally designed to have a diameter of φ30-φ50mm, so that the pin shaft (32) is prone to breakage and bending deformation in the use process, and the service life is relatively short. CONTENT OF THE UTILITY MODEL

[0005] (I) Technical problem to be solved

[0006] In view of the above-mentioned defects and shortcomings of the prior art, the utility model provides a detachable bottom adjusting device for top coal caving end support, which solves the technical problem that the bottom adjusting oil cylinder of the existing top coal caving end support is difficult to simultaneously have the characteristics of relatively easy disassembly and relatively long service life.

[0007] (II) Technical Solution

[0008] In order to achieve the above purpose, the detachable bottom adjusting device for the top coal caving end support of the utility model, the top coal caving end support includes a support base; the detachable bottom adjusting device includes a connecting seat and a bottom adjusting oil cylinder;

[0009] The connecting seat is built in the support base and can be detachably connected with the support base;

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

[0011] The support base can be linearly moved in a first direction; the transfer mechanism can apply a reaction force to the bottom adjusting oil cylinder to adjust the top coal caving end support to the first direction.

[0012] Optionally, the bottom adjusting oil cylinder includes a shell, a telescopic rod, a first pin shaft and a limiting ring;

[0013] The shell is in contact with the transfer mechanism;

[0014] A through hole is formed in the connecting seat; the telescopic rod is slidably connected with the through hole;

[0015] The limiting ring is coaxially arranged on the telescopic rod; the limiting ring is in contact with the inner side wall of the through hole, and the first pin shaft is in contact with the outer side wall of the through hole.

[0016] Optionally, in the adjusted state, the force receiving surface of the bottom adjusting oil cylinder relative to the connecting seat is the surface of the limiting ring facing the through hole.

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

[0018] A pair of clamping grooves are formed in the support base; a pair of the clamping plates and a pair of the clamping grooves are one-to-one correspondingly inserted;

[0019] A connecting shaft is coaxially arranged along the axial direction of the bottom adjusting oil cylinder; one end of the connecting shaft penetrates through one of the clamping plates on the inner side and is connected with the inner side wall of the support base; the other end of the connecting shaft penetrates through the other clamping plate on the outer side and is connected with the outer side wall of the support base through a second pin shaft; the second pin shaft is in contact with the outer side wall of the support base.

[0020] Optionally, the connecting shaft includes a first connecting shaft and a second connecting shaft which are mirror image arranged; one end of the first connecting shaft is connected with one end of the middle part of the support base, and the other end of the second connecting shaft penetrates through the clamping plate and the outer side wall of the support base and is connected with the second pin shaft.

[0021] Optionally, in the adjusting state, the force receiving 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 comprises a base plate;

[0023] The base plate is provided with a pair of bracket bases on both sides one by one; and the transfer mechanism is arranged on the base plate;

[0024] The bracket base on one side is provided with the detachable bottom adjusting device, and the transfer mechanism is arranged close to the detachable bottom adjusting device;

[0025] The bracket base on the other side is provided with a preset transportation mechanism.

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

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

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

[0029] (Three) beneficial effects

[0030] The beneficial effects of the utility model are:

[0031] The connecting seat and the bracket base are detachably connected, so that the connecting seat and the bottom adjusting oil cylinder can be detached from the bracket base. Moreover, one end of the bottom adjusting oil cylinder abuts against the connecting seat, and the other end abuts against the preset transfer mechanism, so that the bottom adjusting oil cylinder can be detached from the connecting seat. The operator can take out the bottom adjusting oil cylinder without exiting the transfer mechanism, which greatly reduces the maintenance labor intensity and improves the maintenance efficiency.

[0032] The bottom adjusting oil cylinder abuts against the connecting seat, that is, the end surface of the telescopic rod of the bottom adjusting oil cylinder abuts against the inner wall surface of the connecting seat. Compared with the pin shaft transmission mode, the face-to-face abutting mode has a larger force receiving area and stronger transmission stability, so that the service life of the bottom adjusting oil cylinder can be effectively prolonged, and the characteristics of easy disassembly and long service life of the bottom adjusting oil cylinder are integrated. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a structure diagram of the bottom adjusting oil cylinder of the top coal caving end support of the prior art one;

[0034] Figure 2 It is a structure diagram of the bottom adjusting oil cylinder of the top coal caving end support of the prior art two;

[0035] Figure 3 It is a front view of the detachable bottom adjusting device for the top coal caving end support of the utility model.

[0036] Figure 4 It is the side view of the detachable bottom adjusting device for the top coal caving end support of the utility model;

[0037] Figure 5 It is the plan view of the detachable bottom adjusting device for the top coal caving end support of the utility model.

[0038] [Legend of reference signs]

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

[0040] In order to better explain the utility model, so as to facilitate understanding, the utility model is described in detail below by combining with the specific embodiments and the drawings.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0043] In the utility model, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood broadly, for example, "fixing" can be fixed connection, or detachable connection, or integral; "connection" can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0044] Reference Figure 3 And Figure 4The utility model provides a detachable bottom adjusting device for top coal caving end support, and the top coal caving end support comprises a support base 1, characterized in that the detachable bottom adjusting device comprises a connecting seat 2 and a bottom adjusting oil cylinder 3; the connecting seat 2 is built in the support base 1 and detachably connected with the support base 1; the bottom adjusting oil cylinder 3 is slidably connected with the connecting seat 2; one end of the bottom adjusting oil cylinder 3 abuts against the connecting seat 2, and the other end abuts against a preset transfer mechanism 6; wherein the support base 1 can be linearly moved in a first direction; the transfer mechanism 6 can exert a reaction force on the bottom adjusting oil cylinder 3 to adjust the top coal caving end support to the first direction. The first direction is the tunneling direction of the underground roadway, and in the embodiment, it is also the length direction of the support base 1.

[0045] The detachable connection of the connecting seat 2 and the support base 1 enables the connecting seat 2 and the bottom adjusting oil cylinder 3 to be detached from the support base 1. Moreover, one end of the bottom adjusting oil cylinder 3 abuts against the connecting seat 2, and the other end abuts against the preset transfer mechanism 6, so that the bottom adjusting oil cylinder 3 can be detached from the connecting seat 2. The operator can take out the bottom adjusting oil cylinder 3 without withdrawing the transfer mechanism 6, greatly reducing the maintenance labor intensity and improving the maintenance efficiency.

[0046] The transfer mechanism 6 can exert a reaction force on the bottom adjusting oil cylinder 3 to adjust the top coal caving end support to the first direction. The bottom adjusting oil cylinder 3 can exert a pushing force on the transfer mechanism 6 through extension and contraction, so the transfer mechanism 6 can exert a reaction force on the bottom adjusting oil cylinder 3. The top coal caving end support is adjusted to the right position through the reaction force, and finally adjusted to the first direction, improving the movement accuracy of the top coal caving end support in the linear movement in the first direction and ensuring the supporting efficiency and strength of the top coal caving end support.

[0047] The bottom adjusting oil cylinder 3 abuts against the connecting seat 2, that is, the end face of the extension rod of the bottom adjusting oil cylinder 3 abuts against the inner wall face of the connecting seat 2. Compared with the pin shaft 32 transmission mode, the face-to-face abutment mode has a larger stress area and stronger transmission stability, so the service life of the bottom adjusting oil cylinder 3 can be effectively prolonged, and the characteristics of easy disassembly and long service life of the bottom adjusting oil cylinder 3 are integrated.

[0048] It should be noted that, as shown in Figure 5 The utility model is different from the conventional mode of arranging the transfer mechanism 6 and the transportation mechanism 7 on both sides of the substrate. Figure 5The upper side and the lower side of the transfer mechanism 6 are provided with the support base 1, the detachable bottom adjusting device is installed on the support base 1 at the lower side, the transportation mechanism 7 is suspended above the detachable bottom adjusting device at the upper side, and the transfer mechanism 6 is arranged on the transfer mechanism 6 base close to the detachable bottom adjusting device at the lower side. Compared with the traditional installation mode of symmetrical arrangement at the upper side and the lower side, the transportation mechanism 7 is arranged on the support base 1 at the upper side without the detachable bottom adjusting device, and the transfer mechanism 6 is arranged on the support base 1 at the lower side with the detachable bottom adjusting device, so that the operation of the working face at one side of the roadway can be ensured, the protruding structure is not arranged below the transportation mechanism 7, the use requirement of the equipment is met, and the reliability of the equipment is improved. When the working face at the other side of the roadway needs to be operated, the transfer mechanism 6, the transportation mechanism 7 and the detachable bottom adjusting device are adjusted in direction, so that the use is flexible, the front and rear working faces are used interchangeably, and the adaptability of the top coal caving end support is more extensive.

[0049] Further, the bottom adjusting oil cylinder 3 comprises a shell, an extension rod, a first pin shaft 5 and a limiting ring 8; the shell is in abutment with the transfer mechanism 6; the connecting seat 2 is provided with a through hole; the extension rod is in sliding connection with the through hole; the limiting ring 8 is coaxially arranged on the extension rod; the limiting ring 8 is in abutment with the inner side wall of the through hole, and the first pin shaft 5 is in abutment with the outer side wall of the through hole. Compared with the mode that the end face of the extension rod is in surface abutment with the inner wall face of the connecting seat 2, the limiting ring 8 is arranged on the extension rod, one face of the limiting ring 8 towards the through hole is a plane, so as to realize the surface abutment of the limiting ring 8 and the through hole, improve the limiting strength and the transmission stability, and prolong the service life of the bottom adjusting oil cylinder 3; the first pin shaft 5 is inserted at one end of the extension rod penetrating through the through hole, and the through hole is clamped between the first pin shaft 5 and the limiting ring 8, so as to limit the movement of the extension rod in the axial direction. The first pin shaft 5 enables the extension rod and the connecting seat 2 to be detachably connected. In actual operation, the connecting seat 2 is first detached from the support base 1, and after the first pin shaft 5 is detached, the remaining parts of the bottom adjusting oil cylinder 3 can be detached together at one end of the connecting seat 2 where the shell is installed, so that the detachable bottom adjusting device is convenient to disassemble when a fault occurs underground, the labor intensity of maintenance is reduced, and the efficiency of maintenance operation is improved.

[0050] Further, in the adjusting state, the force receiving surface of the bottom adjusting oil cylinder 3 relative to the connecting seat 2 is the side of the limiting ring 8 facing the through hole, i.e. the first force receiving surface 51, and the first pin shaft 5 is not under stress. The face-to-face abutting transmission is stable and can effectively prolong the service life of the bottom adjusting oil cylinder 3 and reduce the maintenance frequency of the bottom adjusting oil cylinder 3. During the travel of the top coal caving end support, when the support is tilted, the bottom adjusting oil cylinder 3 is supplied with liquid through the electric control main valve and the connecting rubber pipe, the telescopic rod is elongated and pushes the shell to move, the shell presses the transfer mechanism 6, the pressing force is also the thrust F, F = P·S, wherein P is the pressure of the fully mechanized coal mining face pump station and S is the area of the bottom adjusting oil cylinder 3. The transfer mechanism 6 in turn applies a reaction force to the shell, which realizes the adjustment of the top coal caving end support, improves the movement accuracy of the top coal caving end support during linear moving of the support, and improves the support strength of the top coal caving end support. Of course, the bottom adjusting device can also be used to adjust after the top coal caving end support completes linear moving.

[0051] Secondly, a pair of clamping plates 9 are arranged at the bottom end of the connecting seat 2; a pair of clamping grooves are arranged on the support base 1; the pair of clamping plates 9 and the pair of clamping grooves are one-to-one correspondingly inserted; a connecting shaft 4 is coaxially arranged along the axial direction of the bottom adjusting oil cylinder 3; one end of the connecting shaft 4 penetrates one clamping plate 9 on the inner side and is connected with the inner side wall of the support base 1; the other end of the connecting shaft 4 penetrates the other clamping plate 9 on the outer side and is connected with the outer side wall of the support base 1 through the second pin shaft 10; the second pin shaft 10 abuts against the outer side wall of the support base 1. Specifically, the clamping grooves can limit the clamping plates 9 in the horizontal direction, and the face-to-face abutting transmission can share the reaction force for the limiting ring 8, further prolonging the service life of the bottom adjusting oil cylinder 3 and improving the reliability of the equipment. After the second pin shaft 10 is disassembled, the connecting shaft 4 can be disassembled, and then the connecting seat 2 can be disassembled from the support base 1. Compared with the mode of taking out the bottom adjusting oil 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 disassembly convenience when the bottom adjusting oil cylinder 3 fails underground.

[0052] Further, the connecting shaft 4 comprises a first connecting shaft and a second connecting shaft which are mirror arranged; one end of the first connecting shaft is connected with one end of the middle part of the support base 1, and the other end of the second connecting shaft penetrates through a clamping plate 9 and the outer side wall of the support base 1 and is connected with the second pin shaft 10; one end of the second connecting shaft is connected with the other end of the middle part of the support base 1, and the other end of the second connecting shaft penetrates through another clamping plate 9 and the inner side wall of the support base 1 and is connected with the third pin shaft. Wherein, the middle part of the support base 1 refers to the square block structure formed between the two clamping plates 9 on the support base 1. By segmenting the connecting shaft 4, the length of the connecting shaft 4 is reduced; the first connecting shaft and the second connecting shaft are mirror arranged, and can be disassembled from the inner side and the outer side of the support base 1. Even if the bottom adjusting oil cylinder 3 fails underground, the connecting shaft 4 can be easily taken out of the support base 1, and then the connecting seat 2 is disassembled, thereby improving the disassembly convenience of the connecting shaft 4.

[0053] Secondly, in the adjusting state, the force receiving surface of the connecting seat 2 relative to the support base 1 is the end surface of the clamping plate 9, that is, the second force receiving surface 91, and the connecting shaft 4 is not subjected to force. Similarly, the end surface of the clamping plate 9 abuts against the clamping groove surface, on the one hand, the clamping plate 9 enlarges the force receiving surface of the connecting seat 2 and the support base 1, thereby improving the structural strength of the connecting seat 2; on the other hand, the clamping plate 9 can share the reaction force on the limiting ring 8, thereby improving the reliability of the use of the detachable bottom adjusting device.

[0054] As shown in Figure 5 The top coal caving end support further comprises a base plate (not shown in the figure); a pair of support bases 1 are arranged on both sides of the base plate one by one in a corresponding manner; the transfer mechanism 6 is arranged on the base plate; the detachable bottom adjusting device is arranged on one side of the support base 1, and the transfer mechanism 6 is arranged close to the detachable bottom adjusting device; and the preset transportation mechanism 7 is suspended above the other side of the support base 1. Compared with the traditional mode of arranging the transfer mechanism 6 and the transportation mechanism 7 on both sides of the base plate in a mirror image, the utility model only arranges the transportation mechanism 7 on one side and only arranges the transfer mechanism 6 on the other side. Since the side where the transfer mechanism 6 is arranged is not provided with the transportation mechanism 7, that is, the support base 1 on this side is not suspended with the transportation mechanism 7 above, a protruding structure can be arranged on this side of the support base 1, that is, the detachable bottom adjusting device is arranged. By arranging the transportation mechanism 7 on one side and arranging the transfer mechanism 6 and the detachable bottom adjusting device on the other side, the mode of arranging on different sides makes the detachable bottom adjusting device be able 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 another working face needs to be operated, the positions of the detachable bottom adjusting device, the transfer mechanism 6 and the transportation mechanism 7 are adjusted in a corresponding manner, which is convenient to disassemble and assemble and flexible to use, which can ensure the precision of the straight line shifting of the top coal caving end support and also can be flexibly disassembled and repaired when the detachable bottom adjusting device fails.

[0055] Secondly, the transfer mechanism 6 comprises a transfer machine and a base; the transfer machine is arranged on the base; the bottom adjusting oil cylinder 3 can abut against the base. Figure 5 As an example, the base is arranged on the base plate, the transfer mechanism 6 can be installed on the upper side or the lower side of the base, facilitating flexible disassembly and assembly of the transfer mechanism 6 on the base plate. Moreover, the bottom adjusting oil cylinder 3 abuts against the base, instead of directly abutting against the transfer mechanism 6 itself, the structural strength of the base is higher than that of the transfer mechanism 6, effectively improving the transmission stability of the detachable bottom adjusting device, and ensuring the adjustment accuracy of the top coal caving end support.

[0056] The detachable bottom adjusting device can be freely installed and used according to the needs of the working face. The arrangement of the detachable bottom adjusting device not only reduces the workload of human intervention, but also ensures the support efficiency of the roadway support and improves the safety of the safety channel. The detachable bottom adjusting device has low cost and simple operation.

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

Claims

1. A detachable bottom adjusting 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 adjusting device comprises a connecting seat (2) and a bottom adjusting oil cylinder (3); The connecting seat (2) is built in the support base (1) and detachably connected with the support base (1); The bottom adjusting oil cylinder (3) is slidably connected with the connecting seat (2); one end of the bottom adjusting oil cylinder (3) is in surface-to-surface abutment with the connecting seat (2), and the other end is in abutment with a preset transfer mechanism (6); The support base (1) can be linearly moved in a first direction; the transfer mechanism (6) can apply a reaction force to the bottom adjusting oil cylinder (3) to make the top coal caving end support adjusted to the first direction.

2. The detachable bottom adjusting device for the caving coal end support according to claim 1, characterized in that, The bottom adjusting oil cylinder (3) comprises a shell, an extension rod, a first pin shaft (5) and a limiting ring (8); The shell is in abutment with the transfer mechanism (6); A through hole is formed in the connecting seat (2); the extension rod is slidably connected with the through hole; The limiting ring (8) is coaxially arranged on the extension rod; the limiting ring (8) is in abutment with the inner side wall of the through hole, and the first pin shaft (5) is in abutment with the outer side wall of the through hole.

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

4. The detachable bottom adjusting device for the caving coal end support according to any one of claims 1-3, characterized in that, A pair of clamping plates (9) are arranged at the bottom end of the connecting seat (2); A pair of clamping grooves are formed in the support base (1); a pair of the clamping plates (9) and a pair of the clamping grooves are correspondingly inserted; A connecting shaft (4) is coaxially arranged along the axial direction of the bottom adjusting oil cylinder (3); one end of the connecting shaft (4) penetrates one of the clamping plates (9) on the inner side and is connected with the inner side wall of the support base (1); the other end of the connecting shaft (4) penetrates the other clamping plate (9) on the outer side and is connected with the outer side wall of the support base (1) through a second pin shaft (10); the second pin shaft (10) is in abutment with the outer side wall of the support base (1).

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

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

7. The detachable bottom adjustment device for the coal caving end support according to any one of claims 1-3, characterized in that, The top coal caving end support further comprises a base plate; A pair of the support bases (1) are correspondingly arranged on both sides of the base plate; the transfer mechanism (6) is arranged on the base plate; The support base (1) on one side is provided with the detachable bottom adjusting device, and the transfer mechanism (6) is arranged close to the detachable bottom adjusting device; A preset transportation mechanism (7) is suspended above the support base (1) on the other side.

8. The detachable bottom adjustment device for the caving coal 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 adjusting oil cylinder (3) can be in abutment with the base.

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