Base structure and top coal caving hydraulic support

Abstract

The embodiment of the present invention provides a base structure and a hydraulic support for top coal caving, wherein the base structure includes: a base body; a column, which is arranged on the base body; a first rib plate, which is connected to the base body; a fixed plate, which is arranged on the base body, and the fixed plate is located on the side of the first rib plate close to the column; a pressure plate, which is located on the side of the first rib plate close to the column; a connecting piece, which passes through the fixed plate, the pressure plate and the first rib plate in sequence, and the movement range of the column can be limited by the cooperation of the pressure plate and the first rib plate. In the technical solution of the present invention, since the connecting piece is inserted from the outside of the base structure to the inside of the base structure, the connecting piece will not be affected by the height of the first rib plate when it is inserted, and compared with the method of opening the first rib plate and its surrounding positions to leave installation space, the installation and disassembly of the connecting piece is more convenient, and it is convenient for assembly and maintenance, and the overall strength of the base structure is stronger, which improves the safety factor.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of hydraulic supports, and in particular to a base structure and a top coal caving hydraulic support. Background Art

[0002] In the hydraulic support for top coal caving, the main reinforcement at the rear end of the base is relatively high, which will affect the normal assembly of the fixing pin. In the prior art, openings are made at the main reinforcement and its surroundings to leave installation space. However, the installation and removal of the fixing pin are still difficult, making it inconvenient to assemble and repair the hydraulic support. In addition, this method will affect the overall strength of the base, posing a safety hazard. Summary of the invention

[0003] In order to solve at least one of the above technical problems, an object of an embodiment of the present invention is to provide a base structure.

[0004] Another object of an embodiment of the present invention is to provide a top coal caving hydraulic support having the above-mentioned base structure.

[0005] To achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention provides a base structure, including: a base body; a column, arranged on the base body; a first rib plate, connected to the base body; a fixed plate, arranged on the base body, the fixed plate is located on the side of the first rib plate close to the column; a pressure plate, the pressure plate is located on the side of the first rib plate close to the column; a connecting piece, the connecting piece passes through the fixed plate, the pressure plate and the first rib plate in sequence, and the movement range of the column can be limited by the cooperation of the pressure plate and the first rib plate.

[0006] According to an embodiment of the base structure provided by the present invention, it includes a base body, a column, a first rib plate, a fixing plate, a pressing plate and a connecting piece. Among them, the base body is usually arranged on the ground. The first rib plate is connected to the base body, and the first rib plate and the base body can be detachably connected or fixedly connected. Furthermore, the first rib plate and the base body can be an integrated structure. Compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the first rib plate and the base body are integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved.

[0007] In addition, the column and the fixing plate are both arranged on the base body, the fixing plate is located on the side of the first rib plate close to the column, and the pressure plate is located on the side of the first rib plate close to the column. The column and the base body may be in contact or not. Furthermore, the column may be connected to the base body through other components. The fixing plate may be directly connected to the base body, or may be connected to the base body through other components.

[0008] Furthermore, the connecting member passes through the fixed plate, the pressure plate and the first rib plate in sequence, and the movement range of the column can be limited by the cooperation of the pressure plate and the first rib plate. The pressure plate is located between the fixed plate and the first rib plate, and the fixed plate, the pressure plate and the first rib plate are connected by the connecting member. The connecting member can be one end that passes through the pressure plate, and the pressure plate can rotate around the axis of the connecting member. Further, the first rib plate can constrain the end of the pressure plate away from the connecting member. It can be understood that the first rib plate can limit the rotation range of the pressure plate, and then the pressure plate can constrain the movement range of the column. Therefore, the movement range of the column can be limited by the cooperation of the pressure plate and the first rib plate.

[0009] Furthermore, the first rib plate can be the inner main rib plate in the base structure, so the first rib plate will be connected to the swing beam through the swing beam jack, the height of the first rib plate will be very high, and the position of the fixed plate relative to the position of the first rib plate is the outer side of the base structure, and the connecting piece is passed through the fixed plate, the pressure plate and the first rib plate in sequence, and the movement range of the column is limited by the cooperation of the pressure plate and the first rib plate. Since the connecting piece is inserted from the outer side of the base structure to the inner side of the base structure, the height of the first rib plate will not be affected when the connecting piece is inserted. And compared with the method of opening the first rib plate and its surrounding positions to leave installation space, the installation and disassembly of the connecting piece is more convenient, which is convenient for assembly and maintenance, and the overall strength of the base structure is stronger, which improves the safety factor.

[0010] In addition, the above technical solution provided by the present invention may also have the following additional technical features:

[0011] The above technical solution also includes: a limiting structure, which is arranged on the fixed plate, and the limiting structure can limit the movement of the connecting piece.

[0012] In this technical solution, the limiting structure arranged on the fixed plate can limit the movement of the connecting piece. It can be understood that the limiting structure can limit the axial movement of the connecting piece. After the connecting piece passes through the fixed plate, the pressure plate and the first rib plate in sequence, by setting the limiting structure, the connecting piece can be prevented from falling due to long-term vibration during operation to a large extent, thereby improving the safety factor.

[0013] Furthermore, the limiting structure can be set in the structure of the fixed plate itself, or can be set on the fixed plate in the form of an independent component. Furthermore, when the limiting structure is an independent component, the limiting structure can be set at a position of the fixed plate close to the first rib plate, or can be set at a position of the fixed plate away from the first rib plate. When the limiting structure is located on the side of the fixed plate away from the first rib plate, that is, the limiting structure is on the outside of the base structure, it is more convenient for the staff to operate.

[0014] In the above technical solution, the limiting structure includes: a limiting block, which is arranged on the side of the fixed plate away from the first rib plate, and the connecting member passes through the limiting block, the fixed plate, the pressure plate and the first rib plate in sequence; a limiting portion, which is arranged on the connecting member; and a limiting member, which is arranged on the limiting block, and the limiting member can limit the movement of the connecting member.

[0015] In this technical solution, the limiting structure includes a limiting block, a limiting portion and a limiting member. Among them, the limiting block is arranged on the side of the fixed plate away from the first rib plate, that is, the limiting block is on the outside of the base structure, which is more convenient for the staff to operate. Furthermore, the limiting block and the fixed plate can be detachably connected or fixedly connected. Furthermore, the limiting block and the fixed plate can be an integrated structure. Compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the limiting block and the fixed plate are integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved.

[0016] In addition, the connecting member passes through the limit block, the fixing plate, the pressure plate and the first rib plate in sequence, the limit portion is arranged on the connecting member, and the limit member is arranged on the limit block. The axial movement of the connecting member is limited by the cooperation between the limit member and the limit portion, thereby largely preventing the connecting member from falling off due to long-term vibration during operation.

[0017] In the above technical solution, the limiting portion is an annular groove, the limiting piece is a U-shaped clip, the open end of the U-shaped clip can extend into the limiting block, and the U-shaped clip can cooperate with the annular groove to limit the axial movement of the connector.

[0018] In this technical solution, the limiting portion is an annular groove, and the limiting piece is a U-shaped card. The open end of the U-shaped card can extend into the interior of the limiting block. It can be understood that a mounting hole can be opened on the limiting block, and the two legs of the U-shaped card can extend into the interior of the limiting block through the mounting hole, and the U-shaped card can cooperate with the annular groove, that is, the two legs of the U-shaped card are inserted into the annular groove, so that the U-shaped card can block the axial movement of the connecting piece.

[0019] Furthermore, the open end of the U-shaped card faces downward, which can be understood as the U-shaped card passing through the limit block from top to bottom, thereby preventing the U-shaped card from falling and being unable to continue to limit the axial movement of the connector.

[0020] In the above technical solution, the first rib plate includes: a rib plate body connected to the base body; a stopper provided on one side of the rib plate body close to the fixed plate, and the movement range of the column can be limited by the cooperation of the pressure plate and the stopper.

[0021] In this technical solution, the first rib plate includes a rib plate body and a stopper. The rib plate body and the base body may be detachably connected or fixedly connected. Furthermore, the rib plate body and the base body may be an integrated structure. Compared with the post-processing method, the integrated structure has good mechanical properties and higher connection strength.

[0022] In addition, the stopper is arranged on the side of the rib plate body close to the fixed plate. Since the connecting member passes through the fixed plate, the pressure plate and the first rib plate in sequence, the pressure plate can rotate around the axis of the connecting member. Furthermore, the stopper can constrain the end of the pressure plate away from the connecting member. It can be understood that the stopper can limit the rotation range of the pressure plate, and then the pressure plate can constrain the movement range of the column. Therefore, the movement range of the column can be limited by the cooperation of the pressure plate and the stopper.

[0023] In the above technical solution, the column includes: a column body; a cylinder bottom, which is arranged at the bottom of the column body; an extension part, which is extended downward from the cylinder bottom, and the top of the base body is recessed to form a column socket, and the column socket corresponds to the position of the extension part.

[0024] In this technical solution, the column includes a column body, a cylinder bottom and an extension. Among them, the cylinder bottom is arranged at the bottom of the column body, that is, the cylinder bottom is located at a position where the column is closer to the base body. In addition, the extension part is formed by extending downward from the cylinder bottom, that is, the extension part and the cylinder bottom are an integrated structure. Compared with the post-processing method, the integrated structure has good mechanical properties and higher connection strength. The top of the base body is recessed to form a column socket, and the column socket corresponds to the position of the extension part. Furthermore, the side of the extension part close to the column socket is arc-shaped, and the inner wall of the column socket is also arc-shaped. During the working process, the column will have a range of motion. It can be understood that the range of motion of the column is between the upper limit position and the lower limit position. When the column is in the lower limit position, the side wall of the extension part close to the column socket is completely in contact with the column socket; when the column is in the upper limit position, the first rib plate and the pressure plate cooperate to constrain the range of motion of the column, so the extension part will not completely break away from the column socket.

[0025] In the above technical solution, the pressure plate can limit the movement range of the cylinder bottom, the bottom of the pressure plate extends downward to form a first matching portion, and the top of the cylinder bottom is recessed to form a second matching portion, and the first matching portion and the second matching portion correspond in position.

[0026] In this technical solution, the bottom of the pressure plate extends downward to form a first matching part, that is, the first matching part and the pressure plate are an integrated structure. Compared with the post-processing method, the integrated structure has good mechanical properties and higher connection strength. The top of the cylinder bottom is recessed to form a second matching part, and the first matching part and the second matching part correspond to each other. Furthermore, the side of the first matching part close to the second matching part is arc-shaped, and the inner wall of the second matching part is also arc-shaped. Since the column has a range of motion during operation, when the column moves to the upper limit position, the second matching part will push up the first matching part; when the column moves to the lower limit position, the second matching part will move downward with the first matching part. By setting the arc surface, it can play a guiding role, making the movement process smoother.

[0027] The above technical solution also includes: a rib plate connected to the base body, the rib plate is arranged on a side of the first rib plate close to the column, and the fixing plate is connected to the rib plate.

[0028] In this technical solution, the rib plate is connected to the base body, and further, the rib plate and the base body can be detachably connected or fixedly connected. Furthermore, compared with the post-processing method, the mechanical properties of the one-piece structure are better, thereby improving the connection strength. In addition, since the rib plate and the base body are integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved. The fixed plate is connected to the rib plate, which can be understood as the fixed plate is connected to the base body through the rib plate.

[0029] The above technical solution also includes: a second rib plate connected to the base body, and the second rib plate is arranged on a side of the fixing plate away from the first rib plate.

[0030] In this technical solution, the second rib plate is connected to the base body, and the second rib plate and the base body can be detachably connected or fixedly connected. Furthermore, the second rib plate and the base body are an integrated structure, and compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the first rib plate and the base body are integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved.

[0031] In addition, the second rib plate is arranged on a side of the fixing plate away from the first rib plate, that is, the second rib plate is located outside the base structure. The overall strength of the base structure can be enhanced by arranging the second rib plate.

[0032] Furthermore, the movement range of the column can be limited by multiple pressure plates, and the pressure plate on the outside can be directly connected to the second rib plate through a pin shaft. Since the pin shaft here is also on the outside, it is convenient for the staff to install and disassemble.

[0033] An embodiment of the second aspect of the present invention provides a hydraulic support for top coal caving, comprising: a base structure as described in any of the above embodiments; a top beam connected to an end of a column in the base structure away from the base body; a swing beam connected to one end of the top beam; and a lifting member, wherein both ends of the lifting member are respectively connected to a first rib plate and the swing beam.

[0034] According to an embodiment of the hydraulic support for top coal caving of the present invention, it includes a base structure, a top beam, a swing beam and a lifting member. Usually, the base structure is directly set on the ground, and the top beam is connected to an end of a column in the base structure away from the base body. In addition, the swing beam is connected to one end of the top beam, and the two ends of the lifting member are respectively connected to the first rib plate and the swing beam. Since the first rib plate needs to be connected to the swing beam through the lifting member, the first rib plate is usually very high, and the connecting member penetrates from the outside of the base structure to the inside of the base structure, so the connecting member will not be affected by the height of the first rib plate when it penetrates.

[0035] Furthermore, during the operation, the lifting member will drive the swing beam to swing, providing a protective space for the rear scraper.

[0036] Among them, since the top coal caving hydraulic support includes any base structure in the above-mentioned first aspect, it has the beneficial effects of any of the above-mentioned embodiments, which will not be repeated here.

[0037] Additional aspects and advantages of embodiments of the present invention will become apparent in the following description or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of a base structure according to an embodiment of the present invention is shown;

[0039] Figure 2 A schematic diagram of a base structure (without the column) according to an embodiment of the present invention is shown;

[0040] Figure 3 Shows Figure 2 Schematic diagram of the cross-sectional structure of the AA surface;

[0041] Figure 4 A schematic diagram of a limiting structure according to an embodiment of the present invention is shown;

[0042] Figure 5 A schematic structural diagram of a limit block according to an embodiment of the present invention is shown;

[0043] Figure 6 A schematic structural diagram of a connecting piece according to an embodiment of the present invention is shown;

[0044] Figure 7A schematic structural diagram of a top coal caving hydraulic support according to an embodiment of the present invention is shown.

[0045] in, Figures 1 to 7 The corresponding relationship between the reference numerals and the component names is as follows:

[0046] 1: base body; 11: column socket; 2: column; 21: column body; 22: cylinder bottom; 23: second matching part; 24: extension part; 3: first rib plate; 31: rib plate body; 32: stopper; 41: rib plate; 42: fixing plate; 51: pressure plate; 52: first matching part; 6: connecting piece; 71: limit block; 72: limit part; 73: limit piece; 8: second rib plate; 91: top beam; 92: swing beam; 93: lifting piece. DETAILED DESCRIPTION

[0047] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0048] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0049] Refer to the following Figures 1 to 7 The following describes a base structure and a top coal caving hydraulic support provided according to some embodiments of the present invention.

[0050] Embodiment 1

[0051] like Figure 1 and Figure 2 As shown, a base structure provided by an embodiment of the present invention includes a base body 1, a column 2, a first rib plate 3, a rib plate 41, a fixing plate 42, a pressing plate 51 and a connecting member 6. Among them, the column 2 is arranged on the base body 1, the first rib plate 3 and the base body 1 are an integrated structure, and the rib plate 41 and the base body 1 are an integrated structure. Compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the first rib plate 3 and the base body 1 and the rib plate 41 and the base body 1 are all integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved.

[0052] In addition, the fixing plate 42 is connected to the rib plate 41 , and the fixing plate 42 is located on the side of the first rib plate 3 close to the column 2 , and the pressing plate 51 is also located on the side of the first rib plate 3 close to the column 2 , and the pressing plate 51 is located between the fixing plate 42 and the first rib plate 3 .

[0053] Furthermore, if Figure 3 As shown, the connecting member 6 passes through the fixing plate 42 , the pressing plate 51 and the first rib plate 3 in sequence. It can be understood that the fixing plate 42 , the pressing plate 51 and the first rib plate 3 are connected via the connecting member 6 .

[0054] It should be noted that the connecting member 6 passes through one end of the pressure plate 51, and the pressure plate 51 can rotate around the axis of the connecting member 6. Furthermore, the first rib plate 3 constrains the end of the pressure plate 51 away from the connecting member 6. It can be understood that the first rib plate 3 can limit the rotation range of the pressure plate 51, and then the pressure plate 51 can constrain the movement range of the column 2. Therefore, the cooperation between the pressure plate 51 and the first rib plate 3 can limit the movement range of the column 2.

[0055] Furthermore, the first rib plate 3 is the inner main rib plate in the base structure, so the first rib plate 3 will be connected to the swing beam through the swing beam 92 jack, the height of the first rib plate 3 will be very high, and the position of the fixed plate 42 is the outer side of the base structure relative to the position of the first rib plate 3. The connecting member 6 is passed through the fixed plate 42, the pressure plate 51 and the first rib plate 3 in sequence, and the movement range of the column 2 is limited by the cooperation of the pressure plate 51 and the first rib plate 3. Since the connecting member 6 penetrates from the outer side of the base structure to the inner side of the base structure, the connecting member 6 will not be affected by the height of the first rib plate 3 when it is penetrated. And compared with the method of opening the first rib plate and its surrounding positions to leave installation space, the installation and disassembly of the connecting member 6 is more convenient, convenient for assembly and maintenance, and the overall strength of the base structure is stronger, which improves the safety factor.

[0056] Specifically, the connecting member 6 is a pin.

[0057] In another embodiment, the first rib plate 3 is detachably connected to the base body 1 .

[0058] In another embodiment, the rib plate 41 is detachably connected to the base body 1 .

[0059] In another embodiment, the fixing plate 42 is detachably connected to the rib plate 41 .

[0060] In another embodiment, the fixing plate 42 is fixedly connected to the rib plate 41 .

[0061] Embodiment 2

[0062] like Figure 1 and Figure 2As shown, a base structure provided by an embodiment of the present invention includes a base body 1, a column 2, a first rib plate 3, a rib plate 41, a fixing plate 42, a pressing plate 51 and a connecting member 6. Among them, the column 2 is arranged on the base body 1, the first rib plate 3 and the base body 1 are an integrated structure, and the rib plate 41 and the base body 1 are an integrated structure. Compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the first rib plate 3 and the base body 1 and the rib plate 41 and the base body 1 are all integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved.

[0063] In addition, the fixing plate 42 is connected to the rib plate 41 , and the fixing plate 42 is located on the side of the first rib plate 3 close to the column 2 , and the pressing plate 51 is also located on the side of the first rib plate 3 close to the column 2 , and the pressing plate 51 is located between the fixing plate 42 and the first rib plate 3 .

[0064] Furthermore, if Figure 3 As shown, the connecting member 6 passes through the fixing plate 42 , the pressing plate 51 and the first rib plate 3 in sequence. It can be understood that the fixing plate 42 , the pressing plate 51 and the first rib plate 3 are connected via the connecting member 6 .

[0065] It should be noted that the connecting member 6 passes through one end of the pressure plate 51, and the pressure plate 51 can rotate around the axis of the connecting member 6. Furthermore, the first rib plate 3 constrains the end of the pressure plate 51 away from the connecting member 6. It can be understood that the first rib plate 3 can limit the rotation range of the pressure plate 51, and then the pressure plate 51 can constrain the movement range of the column 2. Therefore, the cooperation between the pressure plate 51 and the first rib plate 3 can limit the movement range of the column 2.

[0066] Furthermore, the first rib plate 3 is the inner main rib plate in the base structure, so the first rib plate 3 will be connected to the swing beam through the swing beam 92 jack, the height of the first rib plate 3 will be very high, and the position of the fixed plate 42 is the outer side of the base structure relative to the position of the first rib plate 3. The connecting member 6 is passed through the fixed plate 42, the pressure plate 51 and the first rib plate 3 in sequence, and the movement range of the column 2 is limited by the cooperation of the pressure plate 51 and the first rib plate 3. Since the connecting member 6 penetrates from the outer side of the base structure to the inner side of the base structure, the connecting member 6 will not be affected by the height of the first rib plate 3 when it is penetrated. And compared with the method of opening the first rib plate and its surrounding positions to leave installation space, the installation and disassembly of the connecting member 6 is more convenient, convenient for assembly and maintenance, and the overall strength of the base structure is stronger, which improves the safety factor.

[0067] Furthermore, the base structure also includes a limiting structure, such as Figure 3 and Figure 4As shown, the limiting structure includes a limiting block 71, a limiting portion 72 and a limiting member 73. The limiting block 71 is arranged on the side of the fixed plate 42 away from the first rib plate 3, that is, the limiting block 71 is located on the outside of the base structure, which is more convenient for the staff to operate. The limiting block 71 and the fixed plate 42 can be an integrated structure. Compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the limiting block 71 and the fixed plate 42 are integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved.

[0068] Furthermore, if Figure 3 As shown, the connecting member 6 passes through the limiting block 71 , the fixing plate 42 , the pressing plate 51 and the first rib plate 3 in sequence, the limiting portion 72 is arranged on the connecting member 6 , and the limiting member 73 is arranged on the limiting block 71 .

[0069] Specifically, Figures 4 to 6 As shown, the limiting portion 72 is an annular groove, and the limiting member 73 is a U-shaped card. The open end of the U-shaped card can be inserted into the inside of the limiting block 71. It can be understood that the limiting block 71 is provided with a mounting hole, and the two legs of the U-shaped card can be inserted into the inside of the limiting block 71 through the mounting hole, and the U-shaped card can cooperate with the annular groove, that is, the two legs of the U-shaped card are inserted into the annular groove, so that the U-shaped card can block the axial movement of the connecting member 6. To a large extent, the connecting member 6 can be prevented from falling due to long-term vibration during operation, thereby improving the safety factor.

[0070] In another embodiment, the limiting block 71 and the fixing plate 42 are detachably connected.

[0071] Embodiment 3

[0072] like Figure 1 and Figure 2 As shown, a base structure provided by an embodiment of the present invention includes a base body 1, a column 2, a first rib plate 3, a rib plate 41, a fixing plate 42, a pressing plate 51 and a connecting member 6. Among them, the column 2 is arranged on the base body 1, the first rib plate 3 and the base body 1 are an integrated structure, and the rib plate 41 and the base body 1 are an integrated structure. Compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the first rib plate 3 and the base body 1 and the rib plate 41 and the base body 1 are all integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved.

[0073] In addition, the fixing plate 42 is connected to the rib plate 41 , and the fixing plate 42 is located on the side of the first rib plate 3 close to the column 2 , and the pressing plate 51 is also located on the side of the first rib plate 3 close to the column 2 , and the pressing plate 51 is located between the fixing plate 42 and the first rib plate 3 .

[0074] Furthermore, the first rib plate 3 includes a rib plate body 31 and a stopper 32 , and the stopper 32 is located on a side of the rib plate body 31 close to the fixing plate 42 .

[0075] Furthermore, if Figure 3 As shown, the connecting member 6 passes through the fixing plate 42 , the pressing plate 51 and the rib plate body 31 in sequence. It can be understood that the fixing plate 42 , the pressing plate 51 and the first rib plate 3 are connected through the connecting member 6 .

[0076] It should be noted that the connecting member 6 passes through one end of the pressure plate 51, and the pressure plate 51 can rotate around the axis of the connecting member 6. Furthermore, the stopper 32 constrains the end of the pressure plate 51 away from the connecting member 6. It can be understood that the stopper 32 can limit the rotation range of the pressure plate 51, and then the pressure plate 51 can constrain the movement range of the column 2. Therefore, the cooperation between the pressure plate 51 and the stopper 32 in the first rib plate 3 can limit the movement range of the column 2.

[0077] Furthermore, the first rib plate 3 is the inner main rib plate in the base structure, so the first rib plate 3 will be connected to the swing beam through the swing beam 92 jack, the height of the first rib plate 3 will be very high, and the position of the fixed plate 42 is the outer side of the base structure relative to the position of the first rib plate 3, and the connecting member 6 is passed through the fixed plate 42, the pressure plate 51 and the rib plate body 31 in sequence, and the movement range of the column 2 is limited by the cooperation of the pressure plate 51 and the stopper 32. Since the connecting member 6 penetrates from the outer side of the base structure to the inner side of the base structure, the connecting member 6 will not be affected by the height of the first rib plate 3 when it is penetrated. And compared with the method of opening the first rib plate and its surrounding positions to leave installation space, the installation and disassembly of the connecting member 6 is more convenient, convenient for assembly and maintenance, and the overall strength of the base structure is stronger, which improves the safety factor.

[0078] Furthermore, the base structure also includes a limiting structure, such as Figure 3 and Figure 4 As shown, the limiting structure includes a limiting block 71, a limiting portion 72 and a limiting member 73. The limiting block 71 is arranged on the side of the fixed plate 42 away from the first rib plate 3, that is, the limiting block 71 is located on the outside of the base structure, which is more convenient for the staff to operate. The limiting block 71 and the fixed plate 42 can be an integrated structure. Compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the limiting block 71 and the fixed plate 42 are integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved.

[0079] Furthermore, if Figure 3As shown, the connecting member 6 passes through the limiting block 71 , the fixing plate 42 , the pressing plate 51 and the rib plate body 31 in sequence, the limiting portion 72 is arranged on the connecting member 6 , and the limiting member 73 is arranged on the limiting block 71 .

[0080] Specifically, Figures 4 to 6 As shown, the limiting portion 72 is an annular groove, and the limiting member 73 is a U-shaped card. The open end of the U-shaped card can be inserted into the inside of the limiting block 71. It can be understood that the limiting block 71 is provided with a mounting hole, and the two legs of the U-shaped card can be inserted into the inside of the limiting block 71 through the mounting hole, and the U-shaped card can cooperate with the annular groove, that is, the two legs of the U-shaped card are inserted into the annular groove, so that the U-shaped card can block the axial movement of the connecting member 6. To a large extent, the connecting member 6 can be prevented from falling due to long-term vibration during operation, thereby improving the safety factor.

[0081] Furthermore, the column 2 includes a column body 21, a cylinder bottom 22 and an extension 24. The cylinder bottom 22 is arranged at the bottom of the column body 21, that is, the cylinder bottom 22 is located at a position where the column 2 is closer to the base body 1. The extension 24 is formed by extending downward from the cylinder bottom 22, that is, the extension 24 and the cylinder bottom 22 are an integrated structure. Compared with the post-processing method, the integrated structure has good mechanical properties and higher connection strength. The top of the base body 1 is recessed to form a column socket 11, and the column socket 11 corresponds to the position of the extension 24. Furthermore, the side of the extension portion 24 close to the column socket 11 is arc-shaped, and the inner wall of the column socket 11 is also arc-shaped. During operation, the column 2 has a range of motion. It can be understood that the range of motion of the column 2 is between the upper limit position and the lower limit position. When the column 2 is at the lower limit position, the side wall of the extension portion 24 close to the column socket 11 is completely in contact with the column socket 11; when the column 2 is at the upper limit position, the first rib plate 3 and the pressure plate 51 cooperate to constrain the range of motion of the column 2, so the extension portion 24 will not completely separate from the column socket 11.

[0082] Embodiment 4

[0083] like Figure 1 and Figure 2 As shown, a base structure provided by an embodiment of the present invention includes a base body 1, a column 2, a first rib plate 3, a rib plate 41, a fixing plate 42, a pressing plate 51 and a connecting member 6. Among them, the column 2 is arranged on the base body 1, the first rib plate 3 and the base body 1 are an integrated structure, and the rib plate 41 and the base body 1 are an integrated structure. Compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the first rib plate 3 and the base body 1 and the rib plate 41 and the base body 1 are all integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved.

[0084] In addition, the fixing plate 42 is connected to the rib plate 41 , and the fixing plate 42 is located on the side of the first rib plate 3 close to the column 2 , and the pressing plate 51 is also located on the side of the first rib plate 3 close to the column 2 , and the pressing plate 51 is located between the fixing plate 42 and the first rib plate 3 .

[0085] Furthermore, the first rib plate 3 includes a rib plate body 31 and a stopper 32 , and the stopper 32 is located on a side of the rib plate body 31 close to the fixing plate 42 .

[0086] Furthermore, if Figure 3 As shown, the connecting member 6 passes through the fixing plate 42 , the pressing plate 51 and the rib plate body 31 in sequence. It can be understood that the fixing plate 42 , the pressing plate 51 and the first rib plate 3 are connected through the connecting member 6 .

[0087] It should be noted that the connecting member 6 passes through one end of the pressure plate 51, and the pressure plate 51 can rotate around the axis of the connecting member 6. Furthermore, the stopper 32 constrains the end of the pressure plate 51 away from the connecting member 6. It can be understood that the stopper 32 can limit the rotation range of the pressure plate 51, and then the pressure plate 51 can constrain the movement range of the column 2. Therefore, the cooperation between the pressure plate 51 and the stopper 32 in the first rib plate 3 can limit the movement range of the column 2.

[0088] Furthermore, the first rib plate 3 is the inner main rib plate in the base structure, so the first rib plate 3 will be connected to the swing beam through the swing beam 92 jack, the height of the first rib plate 3 will be very high, and the position of the fixed plate 42 is the outer side of the base structure relative to the position of the first rib plate 3, and the connecting member 6 is passed through the fixed plate 42, the pressure plate 51 and the rib plate body 31 in sequence, and the movement range of the column 2 is limited by the cooperation of the pressure plate 51 and the stopper 32. Since the connecting member 6 penetrates from the outer side of the base structure to the inner side of the base structure, the connecting member 6 will not be affected by the height of the first rib plate 3 when it is penetrated. And compared with the method of opening the first rib plate and its surrounding positions to leave installation space, the installation and disassembly of the connecting member 6 is more convenient, convenient for assembly and maintenance, and the overall strength of the base structure is stronger, which improves the safety factor.

[0089] Furthermore, the base structure also includes a limiting structure, such as Figure 3 and Figure 4As shown, the limiting structure includes a limiting block 71, a limiting portion 72 and a limiting member 73. The limiting block 71 is arranged on the side of the fixed plate 42 away from the first rib plate 3, that is, the limiting block 71 is located on the outside of the base structure, which is more convenient for the staff to operate. The limiting block 71 and the fixed plate 42 can be an integrated structure. Compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the limiting block 71 and the fixed plate 42 are integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved.

[0090] Furthermore, if Figure 3 As shown, the connecting member 6 passes through the limiting block 71 , the fixing plate 42 , the pressing plate 51 and the rib plate body 31 in sequence, the limiting portion 72 is arranged on the connecting member 6 , and the limiting member 73 is arranged on the limiting block 71 .

[0091] Specifically, Figures 4 to 6 As shown, the limiting portion 72 is an annular groove, and the limiting member 73 is a U-shaped card. The open end of the U-shaped card can be inserted into the inside of the limiting block 71. It can be understood that the limiting block 71 is provided with a mounting hole, and the two legs of the U-shaped card can be inserted into the inside of the limiting block 71 through the mounting hole, and the U-shaped card can cooperate with the annular groove, that is, the two legs of the U-shaped card are inserted into the annular groove, so that the U-shaped card can block the axial movement of the connecting member 6. To a large extent, the connecting member 6 can be prevented from falling due to long-term vibration during operation, thereby improving the safety factor.

[0092] Furthermore, the column 2 includes a column body 21, a cylinder bottom 22 and an extension 24. The cylinder bottom 22 is arranged at the bottom of the column body 21, that is, the cylinder bottom 22 is located at a position where the column 2 is closer to the base body 1. The extension 24 is formed by extending downward from the cylinder bottom 22, that is, the extension 24 and the cylinder bottom 22 are an integrated structure. Compared with the post-processing method, the integrated structure has good mechanical properties and higher connection strength. The top of the base body 1 is recessed to form a column socket 11, and the column socket 11 corresponds to the position of the extension 24. Furthermore, the side of the extension portion 24 close to the column socket 11 is arc-shaped, and the inner wall of the column socket 11 is also arc-shaped. During operation, the column 2 has a range of motion. It can be understood that the range of motion of the column 2 is between the upper limit position and the lower limit position. When the column 2 is at the lower limit position, the side wall of the extension portion 24 close to the column socket 11 is completely in contact with the column socket 11; when the column 2 is at the upper limit position, the first rib plate 3 and the pressure plate 51 cooperate to constrain the range of motion of the column 2, so the extension portion 24 will not completely separate from the column socket 11.

[0093] Furthermore, the bottom of the pressing plate 51 extends downward to form a first matching portion 52, that is, the first matching portion 52 and the pressing plate 51 are an integrated structure. Compared with the post-processing method, the integrated structure has good mechanical properties and higher connection strength. The top of the cylinder bottom 22 is recessed to form a second matching portion 23, and the first matching portion 52 and the second matching portion 23 correspond in position. Furthermore, the side of the first matching portion 52 close to the second matching portion 23 is arc-shaped, and the inner wall of the second matching portion 23 is also arc-shaped. Since the column 2 has a range of motion during operation, when the column 2 moves to the upper limit position, the second matching portion 23 will push up the first matching portion 52; when the column 2 moves to the lower limit position, the second matching portion 23 will move downward with the first matching portion 52. By setting the arc surface, it can play a guiding role, making the movement process more stable.

[0094] Embodiment 5

[0095] like Figure 1 and Figure 2 As shown, a base structure provided by an embodiment of the present invention includes a base body 1, a column 2, a first rib plate 3, a rib plate 41, a fixing plate 42, a pressing plate 51 and a connecting member 6. Among them, the column 2 is arranged on the base body 1, the first rib plate 3 and the base body 1 are an integrated structure, and the rib plate 41 and the base body 1 are an integrated structure. Compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the first rib plate 3 and the base body 1 and the rib plate 41 and the base body 1 are all integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved.

[0096] In addition, the fixing plate 42 is connected to the rib plate 41 , and the fixing plate 42 is located on the side of the first rib plate 3 close to the column 2 , and the pressing plate 51 is also located on the side of the first rib plate 3 close to the column 2 , and the pressing plate 51 is located between the fixing plate 42 and the first rib plate 3 .

[0097] Furthermore, the first rib plate 3 includes a rib plate body 31 and a stopper 32 , and the stopper 32 is located on a side of the rib plate body 31 close to the fixing plate 42 .

[0098] Furthermore, if Figure 3 As shown, the connecting member 6 passes through the fixing plate 42 , the pressing plate 51 and the rib plate body 31 in sequence. It can be understood that the fixing plate 42 , the pressing plate 51 and the first rib plate 3 are connected through the connecting member 6 .

[0099] It should be noted that the connecting member 6 passes through one end of the pressure plate 51, and the pressure plate 51 can rotate around the axis of the connecting member 6. Furthermore, the stopper 32 constrains the end of the pressure plate 51 away from the connecting member 6. It can be understood that the stopper 32 can limit the rotation range of the pressure plate 51, and then the pressure plate 51 can constrain the movement range of the column 2. Therefore, the cooperation between the pressure plate 51 and the stopper 32 in the first rib plate 3 can limit the movement range of the column 2.

[0100] Furthermore, the first rib plate 3 is the inner main rib plate in the base structure, so the first rib plate 3 will be connected to the swing beam through the swing beam 92 jack, the height of the first rib plate 3 will be very high, and the position of the fixed plate 42 is the outer side of the base structure relative to the position of the first rib plate 3, and the connecting member 6 is passed through the fixed plate 42, the pressure plate 51 and the rib plate body 31 in sequence, and the movement range of the column 2 is limited by the cooperation of the pressure plate 51 and the stopper 32. Since the connecting member 6 penetrates from the outer side of the base structure to the inner side of the base structure, the connecting member 6 will not be affected by the height of the first rib plate 3 when it is penetrated. And compared with the method of opening the first rib plate and its surrounding positions to leave installation space, the installation and disassembly of the connecting member 6 is more convenient, convenient for assembly and maintenance, and the overall strength of the base structure is stronger, which improves the safety factor.

[0101] Furthermore, the base structure also includes a limiting structure, such as Figure 3 and Figure 4 As shown, the limiting structure includes a limiting block 71, a limiting portion 72 and a limiting member 73. The limiting block 71 is arranged on the side of the fixed plate 42 away from the first rib plate 3, that is, the limiting block 71 is located on the outside of the base structure, which is more convenient for the staff to operate. The limiting block 71 and the fixed plate 42 can be an integrated structure. Compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the limiting block 71 and the fixed plate 42 are integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved.

[0102] Furthermore, if Figure 3 As shown, the connecting member 6 passes through the limiting block 71 , the fixing plate 42 , the pressing plate 51 and the rib plate body 31 in sequence, the limiting portion 72 is arranged on the connecting member 6 , and the limiting member 73 is arranged on the limiting block 71 .

[0103] Specifically, Figures 4 to 6As shown, the limiting portion 72 is an annular groove, and the limiting member 73 is a U-shaped card. The open end of the U-shaped card can be inserted into the inside of the limiting block 71. It can be understood that the limiting block 71 is provided with a mounting hole, and the two legs of the U-shaped card can be inserted into the inside of the limiting block 71 through the mounting hole, and the U-shaped card can cooperate with the annular groove, that is, the two legs of the U-shaped card are inserted into the annular groove, so that the U-shaped card can block the axial movement of the connecting member 6. To a large extent, the connecting member 6 can be prevented from falling due to long-term vibration during operation, thereby improving the safety factor.

[0104] Furthermore, the column 2 includes a column body 21, a cylinder bottom 22 and an extension 24. The cylinder bottom 22 is arranged at the bottom of the column body 21, that is, the cylinder bottom 22 is located at a position where the column 2 is closer to the base body 1. The extension 24 is formed by extending downward from the cylinder bottom 22, that is, the extension 24 and the cylinder bottom 22 are an integrated structure. Compared with the post-processing method, the integrated structure has good mechanical properties and higher connection strength. The top of the base body 1 is recessed to form a column socket 11, and the column socket 11 corresponds to the position of the extension 24. Furthermore, the side of the extension portion 24 close to the column socket 11 is arc-shaped, and the inner wall of the column socket 11 is also arc-shaped. During operation, the column 2 has a range of motion. It can be understood that the range of motion of the column 2 is between the upper limit position and the lower limit position. When the column 2 is at the lower limit position, the side wall of the extension portion 24 close to the column socket 11 is completely in contact with the column socket 11; when the column 2 is at the upper limit position, the first rib plate 3 and the pressure plate 51 cooperate to constrain the range of motion of the column 2, so the extension portion 24 will not completely separate from the column socket 11.

[0105] Furthermore, the bottom of the pressing plate 51 extends downward to form a first matching portion 52, that is, the first matching portion 52 and the pressing plate 51 are an integrated structure. Compared with the post-processing method, the integrated structure has good mechanical properties and higher connection strength. The top of the cylinder bottom 22 is recessed to form a second matching portion 23, and the first matching portion 52 and the second matching portion 23 correspond in position. Furthermore, the side of the first matching portion 52 close to the second matching portion 23 is arc-shaped, and the inner wall of the second matching portion 23 is also arc-shaped. Since the column 2 has a range of motion during operation, when the column 2 moves to the upper limit position, the second matching portion 23 will push up the first matching portion 52; when the column 2 moves to the lower limit position, the second matching portion 23 will move downward with the first matching portion 52. By setting the arc surface, it can play a guiding role, making the movement process more stable.

[0106] Furthermore, the base structure also includes a second rib plate 8, and the second rib plate 8 and the base body 1 are an integrated structure. Compared with the post-processing method, the integrated structure has better mechanical properties, thereby improving the connection strength. In addition, since the first rib plate 3 and the base body 1 are integrally formed, the integrity of the base structure is improved, the number of parts is reduced, the installation process is reduced, and the installation efficiency is improved. The second rib plate 8 is arranged on the side of the fixing plate 42 away from the first rib plate 3, that is, the second rib plate 8 is on the outside of the base structure. The overall strength of the base structure can be strengthened by providing the second rib plate 8.

[0107] Furthermore, the movement range of the column 2 can be limited by multiple pressure plates 51, and the pressure plate 51 on the outside can be directly connected to the second rib plate 8 through a pin shaft. Since the pin shaft here is also on the outside, it is convenient for the staff to install and disassemble.

[0108] In another embodiment, the second rib plate 8 is detachably connected to the base body 1 .

[0109] Embodiment 6

[0110] like Figure 7 As shown, a hydraulic support for top coal caving provided by one embodiment of the present invention comprises a base structure, a top beam 91, a swing beam 92 and a lifting member 93 in any of the above-mentioned embodiments. Normally, the base structure is directly arranged on the ground, and the top beam 91 is connected to an end of a column 2 in the base structure away from the base body 1. In addition, the swing beam 92 is connected to one end of the top beam 91, and the two ends of the lifting member 93 are respectively connected to the first rib plate and the swing beam 92. Since the first rib plate needs to be connected to the swing beam 92 through the lifting member 93, the first rib plate is usually very high, and the connecting member 6 penetrates from the outside of the base structure to the inside of the base structure, so the connecting member 6 will not be affected by the height of the first rib plate 3 when it is penetrated.

[0111] Furthermore, during operation, the lifting member 93 will drive the swing beam 92 to swing, thereby providing a protective space for the rear scraper.

[0112] The top coal caving hydraulic support provided in this embodiment has the base structure in any of the above embodiments, and thus has all the above beneficial effects, which will not be described in detail here.

[0113] According to the embodiments of the base structure and the top coal caving hydraulic support of the present invention, since the connecting piece is inserted from the outside of the base structure to the inside of the base structure, the connecting piece will not be affected by the height of the first rib plate when it is inserted. In addition, compared with the method of opening the first rib plate and its surrounding positions to leave installation space, the installation and disassembly of the connecting piece is more convenient, which is convenient for assembly and maintenance, and the overall strength of the base structure is stronger, which improves the safety factor.

[0114] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0115] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0116] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", 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.

[0117] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A base structure, characterized in that: include: Base body (1); A column (2) is arranged on the base body (1); A first rib plate (3) connected to the base body (1); A fixing plate (42) is arranged on the base body (1), and the fixing plate (42) is located on a side of the first rib plate (3) close to the column (2); the position of the fixing plate (42) is on the outer side of the base structure relative to the position of the first rib plate (3); A pressing plate (51), the pressing plate (51) being located on a side of the first rib plate (3) close to the column (2); the pressing plate (51) being located between the fixing plate (42) and the first rib plate (3); A connecting member (6), the connecting member (6) sequentially passing through the fixing plate (42), the pressing plate (51) and the first rib plate (3); a limiting structure, provided on the fixing plate (42), wherein the limiting structure is capable of limiting the movement of the connecting member (6); The limiting structure comprises a limiting block (71), a limiting portion (72) and a limiting member (73); The limit block (71) is arranged on a side of the fixing plate (42) away from the first rib plate (3), and the connecting member (6) passes through the limit block (71), the fixing plate (42), the pressing plate (51) and the first rib plate (3) in sequence; The limiting portion (72) is arranged on the connecting member (6); The limiting member (73) is arranged on the limiting block (71), and the limiting member (73) can limit the movement of the connecting member (6); The limiting portion (72) is an annular groove, the limiting member (73) is a U-shaped clip, the open end of the U-shaped clip can extend into the inside of the limiting block (71), and the U-shaped clip can cooperate with the annular groove to limit the axial movement of the connecting member (6); Wherein, the movement range of the column (2) can be limited by the cooperation between the pressure plate (51) and the first rib plate (3); The base structure further comprises a rib plate (41) connected to the base body (1), the rib plate (41) being arranged on a side of the first rib plate (3) close to the column (2), and the fixing plate (42) being connected to the rib plate (41); The base structure also includes a second rib plate (8) connected to the base body (1), and the second rib plate (8) is arranged on a side of the fixing plate (42) away from the first rib plate (3).

2. The base structure according to claim 1, characterized in that: The first rib plate (3) comprises: A rib plate body (31) connected to the base body (1); A stopper (32) is provided on a side of the rib plate body (31) close to the fixing plate (42). The movement range of the column (2) can be limited by the cooperation between the pressure plate (51) and the stopper (32).

3. The base structure according to claim 1, characterized in that: The column (2) comprises: Column (21); A cylinder bottom (22), arranged at the bottom of the column (21); an extension portion (24), wherein the extension portion (24) is formed by extending downward from the cylinder bottom (22), The top of the base body (1) is recessed to form a column socket (11), and the column socket (11) corresponds to the position of the extension portion (24).

4. The base structure according to claim 3, characterized in that: The pressure plate (51) can limit the movement range of the cylinder bottom (22); the bottom of the pressure plate (51) extends downward to form a first matching portion (52); the top of the cylinder bottom (22) is recessed to form a second matching portion (23); the first matching portion (52) and the second matching portion (23) correspond in position.

5. A hydraulic support for top coal caving, characterized in that: include: The base structure according to any one of claims 1 to 4; A top beam (91) connected to an end of the column (2) in the base structure that is away from the base body (1); A swing beam (92) connected to one end of the top beam (91); A lifting member (93), wherein two ends of the lifting member (93) are respectively connected to the first rib plate (3) and the swing beam (92).

Images