A telescopic base arm support structure for a large-angle end bracket

Abstract

The present invention relates to the technical field of end brackets, and is used to solve the problems that traditional supporting methods are difficult to achieve ideal supporting strength, and the bottom plate at the head position of the scraper conveyor at the outlet under the mining surface is prone to collapse and difficult to manage. The present invention is specifically a telescopic base guard arm support structure of a large-inclination end bracket, comprising a base, the top of the base is rotatably connected to multiple groups of columns one and two, a top beam is arranged on the top of the base, side guard plates are installed on the outer side of the top beam, the top ends of the columns one and two are both rotatably connected to the bottom of the top beam, a pushing assembly is fixedly installed at the bottom of the top beam, the pushing assembly comprises a slide rail and an I-shaped slider, the slide rail is fixedly connected to the bottom of the top beam, a bottom support assembly is arranged at the bottom of the I-shaped slider, the bottom support assembly comprises a fixed seat and a support, and the top of the fixed seat is fixedly connected to the bottom of the I-shaped slider; compared with the prior art, the present invention can effectively and flexibly and powerfully support hydraulic supports under various inclination states.

Description

Technical Field

[0001] The invention relates to the technical field of end brackets, in particular to a telescopic base arm support structure of a large-inclination-angle end bracket. Background Art

[0002] Due to the complex working conditions of fully mechanized mining faces in the southwest region and the large number of inclined and steeply inclined mining faces, it is difficult to protect the safety of personnel at the head position of the mining face exit and maintain the top and bottom plates during mining. The traditional method is to use single columns to support the area, or to use end hydraulic supports arranged perpendicular to the mining face to build a safe passage for personnel and support the top and bottom plates of the mining face. It is often the case that the top beam of the end frame has poor contact with the top plate and it is difficult to achieve the ideal support strength, and the bottom plate at the head position of the scraper conveyor at the exit of the mining face is prone to collapse and difficult to manage.

[0003] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0004] The object of the present invention is to provide a telescopic base arm support structure of a large-angle end bracket, which is used to solve the problems mentioned in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A telescopic base arm support structure of a large-angle end bracket comprises a base, the top of the base is rotatably connected to multiple groups of columns 1 and 2, a top beam is arranged on the top of the base, a side guard plate is installed on the outer side of the top beam, the top ends of the columns 1 and 2 are both rotatably connected to the bottom of the top beam, a pushing assembly is fixedly installed at the bottom of the top beam, the pushing assembly comprises a slide rail and an I-shaped slider, the slide rail is fixedly connected to the bottom of the top beam, and a bottom support assembly is arranged at the bottom of the I-shaped slider;

[0007] The bottom support assembly includes a fixed seat and a support seat. The top of the fixed seat is fixedly connected to the bottom of the I-shaped slider. The bottom of the support seat is symmetrically rotatably connected to an abutment rod. An abutment column is fixedly sleeved on the outer side of the abutment rod. The bottom end of the abutment column is rotatably connected to an abutment block.

[0008] Furthermore, an axle seat is fixed to the outer side of the abutment column by spot welding, a driving arm is rotatably connected inside the axle seat, a cover shell 2 is fixedly connected to the bottom of the support, a hydraulic push rod 2 is fixedly connected to the interior of the cover shell 2, a driving rod is fixedly connected to the output end of the hydraulic push rod 2, both ends of the driving rod are rotatably connected to the corresponding bottom end of the driving arm, a limit stop frame is fixedly arranged in a matrix on the top of the base, and the abutment block cooperates with the limit stop frame.

[0009] Furthermore, the pushing assembly also includes a hydraulic push rod and a guide rail. The hydraulic push rod is fixedly connected to the inside of the slide rail. The bottom of the bottom of the top beam is also fixedly connected to the guide rail. A guide block is slidably connected to the guide rail. A bearing plate is fixed to the outer side of the guide block by spot welding, and an L-shaped connecting rod is fixedly connected to the side of the bearing plate.

[0010] Furthermore, one end of the L-shaped connecting rod is fixed to the fixing seat by spot welding, the bottom of the L-shaped connecting rod is fixedly connected to a cover shell 1, the support and the fixing seat are connected by a rotating shaft, and a motor for driving the rotating shaft to rotate is fixedly installed inside the cover shell 1.

[0011] Furthermore, one end of the top beam is rotatably connected to the tail beam, a bearing seat is provided on one side of the top of the base, the top of the bearing seat is rotatably connected to the front connecting seat and the rear connecting seat, the tops of the front connecting seat and the rear connecting seat are both rotatably connected to the bottom of the tail beam, one end of the tail beam is connected to a shielding beam, one end of the shielding beam is fixedly connected to a plug plate, and one end of the top beam away from the tail beam is rotatably connected to the front beam.

[0012] Furthermore, the bottom of the top beam is rotatably connected to a hydraulic push rod three, the bottom of the front beam is fixedly connected to a connecting frame, the output end of the hydraulic push rod three is rotatably connected to the connecting frame, the bottom of the front beam is fixedly connected to a hydraulic push rod four, the interior of the front beam is slidably connected to a telescopic beam, and the output end of the hydraulic push rod four is fixedly connected to the bottom of the telescopic beam.

[0013] Furthermore, the bottom of the front beam is rotatably connected to a hydraulic push rod five, one end of the telescopic beam is rotatably connected to a guard plate, the output end of the hydraulic push rod five is rotatably connected to the guard plate, and one end of the base is connected to a push rod.

[0014] The present invention also proposes an operation method of a telescopic base arm support structure of a large-angle end bracket, comprising the following steps:

[0015] Step 1: First, the top beam is lifted and lowered in cooperation with the first and second columns until the top of the top beam contacts the bottom plate. During the lifting process of the top beam, the front connecting seat and the rear connecting seat are deflected relative to the bearing seat and the tail beam, thereby realizing the lifting and lowering adjustment of the top beam, so as to facilitate the support of the bottom plate at the top of the mine safety passage;

[0016] Step 2: The hydraulic push rod drives the I-shaped slider to slide in the slide rail, and the I-shaped slider drives the fixed seat connected to its bottom to move synchronously. When the fixed seat moves synchronously, it drives the bearing plate fixed to its top to move synchronously through the L-shaped connecting rod, and the guide block slides synchronously in the guide rail under the action of the bearing plate;

[0017] When the bottom support assembly moves to the specified position under the drive of the hydraulic push rod 1, the motor drives the support to deflect synchronously until the abutment column deflects 90 degrees, so that the abutment column can effectively support the base and the top beam;

[0018] Step three: start hydraulic push rod 2 again, hydraulic push rod 2 extends and retracts upward and pushes the driving rod to move upward synchronously. The driving rod drives the driving arm to deflect during the upward movement, and the abutment column deflects under the action of the driving arm until the abutment block enters the limit stop frame driven by the deflection of the abutment column. At this time, the movement of the driving rod is stopped, thereby achieving comprehensive and strong auxiliary support for the top beam and the base.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] When the present invention is in use: the lifting and lowering of the driving rod is controlled by the second hydraulic push rod, so that the abutment column is continuously deflected until it is deflected to a position matching the position after the top beam stops lifting and lowering at this time. At the same time, the abutment column is supported between the top beam and the base with the cooperation of the abutment block and the limit stop frame, thereby further strengthening the overall support capacity of the hydraulic support for the safe passage of the mine tunnel and the ability to resist mine tunnel collapse under different inclination angles.

[0021] When the present invention is in use, the position of the abutment column can be flexibly changed through the cooperation between the pushing assembly and the bottom support assembly, thereby being able to provide strong support capabilities for the hydraulic supports in various inclination angles, and strengthen the connection and force between adjacent hydraulic supports, thereby avoiding the problem of support force failure of the hydraulic supports in large inclination angles due to uneven force.

[0022] When the present invention is in use: four groups of abutment columns for support are arranged at the bottom of the top beam in a single hydraulic support, and the abutment columns close to both sides of the top beam can cause the abutment blocks at the bottom ends of the abutment columns to be inserted into the corresponding limit stop frames at the tops of the adjacent hydraulic support bases through deflection. Therefore, when one of the hydraulic supports has a support problem, the abutment columns of the adjacent hydraulic supports can be used to promptly provide auxiliary support to the hydraulic support with the support problem through the abutment columns of the adjacent hydraulic supports.

[0023] When the present invention is in use: a motor is provided, and the motor drives the support to deflect synchronously until the abutment column deflects to a certain degree, so that the abutment column can effectively support the base and the top beam, or the abutment column can deflect in the opposite direction under the drive of the motor, thereby achieving the purpose of facilitating the storage of the bottom support assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings;

[0025] Figure 1 It is a front view of the overall structure of the present invention;

[0026] Figure 2 It is a side view of the top beam structure in the present invention;

[0027] Figure 3 It is a side view of the rotating shaft structure in the present invention;

[0028] Figure 4 It is a front view of the slide rail structure in the present invention;

[0029] Figure 5 It is a front view of the structure of a hydraulic push rod inside the slide rail of the present invention;

[0030] Figure 6 It is a schematic diagram of the connection between the abutment block and the limit stop frame in the present invention.

[0031] Figure numerals: 1, base; 201, column 1; 202, column 2; 3, top beam; 4, side guard plate; 5, push assembly; 501, slide rail; 502, I-type slide block; 503, hydraulic push rod 1; 504, guide rail; 505, guide block; 506, bearing plate; 507, L-shaped connecting rod; 508, cover 1; 509, motor; 510, rotating shaft; 6, bottom support assembly; 601, fixed seat; 602, support; 603, abutment rod; 604 , abutment column; 605, abutment block; 606, axle seat; 607, driving arm; 608, cover shell two; 609, hydraulic push rod two; 610, driving rod; 611, limit stop frame; 701, front connecting seat; 702, rear connecting seat; 8, tail beam; 9, shield beam; 10, plug plate; 11, front beam; 12, hydraulic push rod three; 13, connecting frame; 14, hydraulic push rod four; 15, telescopic beam; 16, hydraulic push rod five; 17, guard plate; 18, push rod. Implementation

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0033] like Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, the traditional method is to use a single column to support the mining safety passage, or to use the end hydraulic support arranged perpendicular to the mining face to build a personnel safety passage and support the top and bottom plates of the mining face. It often happens that the top beam 3 of the end frame is not in good contact with the top plate and cannot reach the ideal support strength. The bottom plate of the head of the transfer machine collapses, which hinders the advancement of coal mining. This has a great negative impact on coal mining safety and efficiency. In order to solve the problem that the top beam 3 of the end support has a good top connection effect and reaches the ideal support strength, the stability of the bottom plate wall of the transfer machine and the head is ensured, so that coal mining can be safer and more efficient.

[0034] To solve this problem, the specific improvements are as follows:

[0035] A telescopic base guard arm support structure of a large-angle end bracket comprises a base 1, the top of the base 1 is rotatably connected to multiple groups of columns 1 201 and columns 202, a top beam 3 is arranged on the top of the base 1, a side guard plate 4 is installed on the outer side of the top beam 3, the top ends of the columns 1 201 and 202 are both rotatably connected to the bottom of the top beam 3, a push assembly 5 is fixedly installed on the bottom of the top beam 3, the push assembly 5 comprises a slide rail 501 and an I-shaped slider 502, the slide rail 501 is fixedly connected to the bottom of the top beam 3, a bottom support assembly 6 is arranged on the bottom of the I-shaped slider 502; the bottom support assembly 6 comprises a fixed seat 601 and a support seat 602, the top of the fixed seat 601 is fixedly connected to the bottom of the I-shaped slider 502, the bottom of the support seat 602 is symmetrically rotatably connected to an abutment rod 603, and an abutment column is fixedly sleeved on the outer side of the abutment rod 603 604, the bottom end of the abutment column 604 is rotatably connected with an abutment block 605, the outer side of the abutment column 604 is fixed with an axle seat 606 by spot welding, the inside of the axle seat 606 is rotatably connected with a driving arm 607, the bottom of the support 602 is fixedly connected with a cover shell 2 608, the inside of the cover shell 2 608 is fixedly connected with a hydraulic push rod 2 609, the output end of the hydraulic push rod 2 609 is fixedly connected with a driving rod 610, both ends of the driving rod 610 are rotatably connected to the bottom end of the corresponding driving arm 607, the top of the base 1 is fixed with a limited stop frame 611 arranged in a matrix, the abutment block 605 enters the inside of the limited stop frame 611 with the cooperation of the abutment column 604 and other structures, and the deflection of the abutment column 604 is limited by the mutual cooperation of the limited stop frame 611 and the abutment block 605, thereby achieving comprehensive support for the top beam 3.

[0036] One end of the top beam 3 is rotatably connected to the tail beam 8, and a bearing seat is provided on one side of the top of the base 1. The top of the bearing seat is rotatably connected to the front connecting seat 701 and the rear connecting seat 702. The top ends of the front connecting seat 701 and the rear connecting seat 702 are both rotatably connected to the bottom of the tail beam 8.

[0037] In the specific setting, the top beam 3 is lifted and lowered in cooperation with the column 1 201 and the column 2 202 until the top of the top beam 3 contacts the bottom plate. During the lifting and lowering process of the top beam 3, the front connecting seat 701 and the rear connecting seat 702 are deflected relative to the bearing seat and the tail beam 8, thereby realizing the lifting and lowering adjustment of the top beam 3;

[0038] Then, the hydraulic push rod 609 is started, and the hydraulic push rod 609 is extended and retracted upward and pushes the driving rod 610 to move upward synchronously. In the process of moving upward, the driving rod 610 drives the driving arm 607 to deflect. Under the action of the driving arm 607, the abutment column 604 deflects with the rotation connection between its top end and the support 602 as the center of the circle. The abutment block 605 enters the limit stop frame 611 under the deflection of the abutment column 604, and the movement of the driving rod 610 is stopped at this time.

[0039] The hydraulic push rod 609 controls the lifting of the driving rod 610, thereby causing the abutment column 604 to deflect continuously until it deflects to a position matching the position after the top beam 3 stops lifting. At the same time, the abutment column 604 supports between the top beam 3 and the base 1 with the cooperation of the abutment block 605 and the limit stop frame 611, thereby further strengthening the overall support capacity of the hydraulic support for the mine tunnel safety passage and the ability to resist mine tunnel collapse.

[0040] In order to further enhance the overall support capacity of the hydraulic support for the mine safety passage, and to strengthen the connection and force between adjacent hydraulic supports, four groups of abutment columns 604 for support are arranged at the bottom of the top beam 3 in a single hydraulic support. Figure 2 As shown in the perspective, the abutment columns 604 located on the far left and the far right can cause the abutment blocks 605 at the bottom of the abutment columns 604 to be inserted into the corresponding limiting baffle frames 611 at the tops of the adjacent hydraulic support bases 1 through deflection. It should be noted here that both ends of the limiting baffle frames 611 can allow the abutment blocks 605 to enter, so that when one of the hydraulic supports has a support problem, it can promptly provide auxiliary support to the hydraulic support with the support problem through its internal action on the abutment columns 604 of the adjacent hydraulic support. Example 2

[0041] like Figure 2-Figure 5 As shown, since the hydraulic support is based on the inner diameter of the mine safety passage and adjusts the column 1 201 and the column 2 202 to achieve tight support for the inner wall of the mine safety passage, when the hydraulic support deflects at a large angle, its overall support capacity for the mine safety passage will be greatly reduced, which is likely to cause safety hazards. To solve the above problems, specific improvements are as follows:

[0042] The pushing assembly 5 includes a hydraulic push rod 503 and a guide rail 504, wherein the hydraulic push rod 503 is fixedly connected to the inside of the slide rail 501, and the bottom of the bottom of the top beam 3 is also fixedly connected to the guide rail 504, and a guide block 505 is slidably connected in the guide rail 504, and a bearing plate 506 is fixedly connected to the outer side of the guide block 505 by spot welding, and an L-shaped connecting rod 507 is fixedly connected to the side of the bearing plate 506, and one end of the L-shaped connecting rod 507 is fixed to the fixed seat 601 by spot welding, and a cover shell 508 is fixedly connected to the bottom of the L-shaped connecting rod 507, and the support 602 and the fixed seat 601 are connected by a rotating shaft 510, and a motor 509 for driving the rotating shaft 510 to rotate is fixedly installed inside the cover shell 508;

[0043] When setting specifically, the hydraulic push rod 503 is started, and the hydraulic push rod 503 drives the I-shaped slider 502 to slide in the slide rail 501, and the I-shaped slider 502 drives the fixed seat 601 fixedly connected at the bottom thereof to move synchronously, and an L-shaped connecting rod 507 is fixedly connected to one side of the fixed seat 601, so that when the fixed seat 601 moves synchronously, the L-shaped connecting rod 507 drives the bearing plate 506 fixedly connected at the top thereof to move synchronously, and the guide block 505 slides synchronously in the guide rail 504 under the action of the bearing plate 506;

[0044] When the bottom support assembly 6 moves to the specified position under the drive of the hydraulic push rod 503, the motor 509 is started, and the motor 509 drives the support 602 to deflect synchronously until the abutment column 604 deflects 90 degrees, so that the abutment column 604 can effectively support the base 1 and the top beam 3.

[0045] like Figure 2 As shown, two groups of bottom support components 6 are provided on both sides of the top beam 3, and the two groups of bottom support components 6 on the same side can slide independently;

[0046] There are many specific implementation methods of the bottom support components 6 on both sides of the same side:

[0047] Mode 1: This mode is applicable to a hydraulic support in a state of large inclination angle. Two bottom support assemblies 6 on the same side, one of which is located near the front connecting seat 701, and the other bottom support assembly 6 is moved to a position close to the front beam 11 under the cooperation of the hydraulic push rod 503 and other structures. At the same time, the two bottom support assemblies 6 on the other side are arranged in the same position. By arranging four groups of bottom support assemblies 6 that can be moved separately in a single hydraulic support, when the hydraulic support is adjusted to a state of large inclination angle in time, the position of the bottom support assembly 6 can be flexibly changed, thereby providing a strong supporting capacity for the hydraulic support in real time, avoiding the problem of failure of the supporting force of the hydraulic support in a state of large inclination angle due to uneven force.

[0048] Mode 2: This mode is suitable for hydraulic supports in a small inclination state. The two bottom support assemblies 6 on the same side are close to each other under the cooperation of the hydraulic push rod 1 503 and other structures. At this time, the two bottom support assemblies 6 on the same side are in a parallel support state, that is, the corresponding abutment columns 604 are in a parallel support state. At the same time, the two bottom support assemblies 6 on the other side are arranged in the same position, so that the four groups of bottom support assemblies 6 centrally support the top beam 3. The top beam 3 is supported by the four groups of bottom support assemblies 6, thereby greatly improving the lifting and lowering of the top beam 3 under the cooperation of the column 1 201 and the column 2 202 until the top of the top beam 3 contacts the bottom plate. During the lifting and lowering process of the top beam 3, the front connecting seat 701 and the rear connecting seat 702 are deflected relative to the bearing seat and the tail beam 8, thereby realizing the support capacity of the lifting and lowering adjustment of the top beam 3;

[0049] Method three: This method is suitable for hydraulic supports in a small inclination state. The two bottom support assemblies 6 on one side are close to each other with the cooperation of structures such as the hydraulic push rod 503, and under the action of the motor 509, the two bottom support assemblies 6 on the same side are in a crossed state, that is, the corresponding abutment columns 604 are in a cross-supported state, and the top beam 3 is cross-supported, thereby achieving further strong support for the top beam 3. Example 3

[0050] like Figure 1 As shown, one end of the tail beam 8 is connected to the shield beam 9, one end of the shield beam 9 is fixedly connected to the plug plate 10, one end of the top beam 3 away from the tail beam 8 is rotatably connected to the front beam 11, the bottom of the top beam 3 is rotatably connected to the hydraulic push rod three 12, the bottom of the front beam 11 is fixedly connected to the connecting frame 13, the output end of the hydraulic push rod three 12 is rotatably connected to the connecting frame 13, the bottom of the front beam 11 is fixedly connected to the hydraulic push rod four 14, the internal sliding connection of the front beam 11 is connected to the telescopic beam 15, the output end of the hydraulic push rod four 14 is fixedly connected to the bottom of the telescopic beam 15, the bottom of the front beam 11 is rotatably connected to the hydraulic push rod five 16, one end of the telescopic beam 15 is rotatably connected to the side guard plate 17, the output end of the hydraulic push rod five 16 is rotatably connected to the side guard plate 17, and one end of the base 1 is connected to the push rod 18.

[0051] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A telescopic base arm support structure for a large-angle end bracket, comprising a base (1), characterized in that: The top of the base (1) is rotatably connected to a plurality of groups of columns 1 (201) and columns 2 (202); a top beam (3) is arranged on the top of the base (1); a side guard plate (4) is installed on the outer side of the top beam (3); the tops of the columns 1 (201) and 2 (202) are both rotatably connected to the bottom of the top beam (3); a push assembly (5) is fixedly installed at the bottom of the top beam (3); the push assembly (5) comprises a slide rail (501) and an I-shaped slide block (502); the slide rail (501) is fixedly connected to the bottom of the top beam (3); and a bottom support assembly (6) is arranged at the bottom of the I-shaped slide block (502); The bottom support assembly (6) comprises a fixed seat (601) and a support seat (602), the top of the fixed seat (601) is fixedly connected to the bottom of the I-shaped slider (502), the bottom of the support seat (602) is symmetrically rotatably connected to an abutment rod (603), an abutment column (604) is sleeved and fixed on the outer side of the abutment rod (603), and the bottom end of the abutment column (604) is rotatably connected to an abutment block (605); The outer side of the abutment column (604) is fixed with an axle seat (606) by spot welding, and a driving arm (607) is rotatably connected inside the axle seat (606), and the bottom of the support (602) is fixedly connected with a cover shell 2 (608), and the inside of the cover shell 2 (608) is fixedly connected with a hydraulic push rod 2 (609), and the output end of the hydraulic push rod 2 (609) is fixedly connected with a driving rod (610), and both ends of the driving rod (610) are rotatably connected to the bottom end of the corresponding driving arm (607), and a limit stop frame (611) is fixedly arranged in a matrix on the top of the base (1), and the abutment block (605) cooperates with the limit stop frame (611); The pushing assembly (5) further comprises a hydraulic push rod (503) and a guide rail (504), wherein the hydraulic push rod (503) is fixedly connected to the inside of the slide rail (501), the bottom of the top beam (3) is also fixedly connected to the guide rail (504), a guide block (505) is slidably connected to the inside of the guide rail (504), a bearing plate (506) is fixedly connected to the outside of the guide block (505) by spot welding, and an L-shaped connecting rod (507) is fixedly connected to the side of the bearing plate (506); One end of the L-shaped connecting rod (507) is fixed to the fixing seat (601) by spot welding, the bottom of the L-shaped connecting rod (507) is fixedly connected to a cover shell (508), the support (602) and the fixing seat (601) are connected via a rotating shaft (510), and a motor (509) for driving the rotating shaft (510) to rotate is fixedly installed inside the cover shell (508).

2. A telescopic base arm support structure for a large-angle end bracket according to claim 1, characterized in that: One end of the top beam (3) is rotatably connected to the tail beam (8); a bearing seat is provided on one side of the top of the base (1); the top of the bearing seat is rotatably connected to a front connecting seat (701) and a rear connecting seat (702); the top ends of the front connecting seat (701) and the rear connecting seat (702) are both rotatably connected to the bottom of the tail beam (8); one end of the tail beam (8) is connected to a shielding beam (9); one end of the shielding beam (9) is fixedly connected to a plug plate (10); and one end of the top beam (3) away from the tail beam (8) is rotatably connected to the front beam (11).

3. A telescopic base arm support structure for a large-angle end bracket according to claim 2, characterized in that: The bottom of the top beam (3) is rotatably connected to a hydraulic push rod three (12), the bottom of the front beam (11) is fixedly connected to a connecting frame (13), the output end of the hydraulic push rod three (12) is rotatably connected to the connecting frame (13), the bottom of the front beam (11) is fixedly connected to a hydraulic push rod four (14), the interior of the front beam (11) is slidably connected to a telescopic beam (15), and the output end of the hydraulic push rod four (14) is fixedly connected to the bottom of the telescopic beam (15).

4. A telescopic base arm support structure for a large-angle end bracket according to claim 3, characterized in that: The bottom of the front beam (11) is rotatably connected to a hydraulic push rod five (16), one end of the telescopic beam (15) is rotatably connected to a side guard plate (17), an output end of the hydraulic push rod five (16) is rotatably connected to the side guard plate (17), and one end of the base (1) is connected to a push rod (18).

5. The method for operating the telescopic base arm support structure of the large-angle end bracket according to claim 4 is characterized in that: The following steps are involved: Step 1: First, the top beam (3) is raised and lowered in cooperation with the first column (201) and the second column (202) until the top of the top beam (3) contacts the bottom plate. During the process of raising and lowering the top beam (3), the front connecting seat (701) and the rear connecting seat (702) are deflected relative to the bearing seat and the tail beam (8), thereby realizing the raising and lowering adjustment of the top beam (3), so as to facilitate supporting the bottom plate at the top of the mine safety passage; Step 2: The hydraulic push rod 1 (503) drives the I-shaped slider (502) to slide in the slide rail (501), and the I-shaped slider (502) drives the fixed seat (601) connected to the bottom thereof to move synchronously. When the fixed seat (601) moves synchronously, it drives the bearing plate (506) fixedly connected to the top thereof to move synchronously through the L-shaped connecting rod (507), and the guide block (505) slides synchronously in the guide rail (504) under the action of the bearing plate (506); When the bottom support assembly (6) moves to a specified position under the drive of the hydraulic push rod (503), the motor (509) drives the support (602) to deflect synchronously until the abutment column (604) deflects 90 degrees, so that the abutment column (604) can effectively support the base (1) and the top beam (3); Step 3: Start the hydraulic push rod 2 (609) again. The hydraulic push rod 2 (609) extends upward and pushes the driving rod (610) to move upward synchronously. The driving rod (610) drives the driving arm (607) to deflect during the upward movement. The abutment column (604) deflects under the action of the driving arm (607) until the abutment block (605) enters the limit stop frame (611) driven by the deflection of the abutment column (604). At this time, the movement of the driving rod (610) is stopped, thereby achieving comprehensive and strong auxiliary support for the top beam (3) and the base (1).

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