Installation auxiliary tool for blind bolts, installation kit and use method therefor

Abstract

Provided are an installation auxiliary tool for blind bolts, an installation kit and a use method therefor. The installation auxiliary tool for blind bolts (100) comprises a clamping assembly (10), a connection assembly (20), an elastic member (60) and a force transmission member (50). The clamping assembly (10) comprises two clamping arms (11), the two clamping arms (11) being arranged opposite to each other in a spaced-apart manner, and one end of each clamping arm (11) being a clamping end (111). Two ends of the connection assembly (20) are respectively and rotatably connected to the two clamping arms (11). Two ends of the elastic member (60) are respectively connected to the two clamping arms (11), and are used for driving the clamping ends (111) of the two clamping arms (11) to approach each other. The force transmission member (50) is located between the two clamping arms (11) and is in threaded connection with the connection assembly (20). The installation kit comprises a blind bolt (100) and said installation auxiliary tool, said installation auxiliary tool being used for assisting in installing the blind bolt (100). During use of the said installation auxiliary tool, the force transmission member (50) is rotated to convert the torque of the force transmission member (50) into an axial force, so as to easily push the blind bolt (100) to pass through an installation hole, thus effectively reducing physical exertion of operators, and helping to reduce the workload of the operators.

Description

The present application relates to the technical field of mechanical auxiliary tools, and more particularly to a blind bolt installation auxiliary tool, an installation kit, and a method of using the same. BACKGROUND Due to the difficulty of connecting a crossbeam with pre-welded end plates to a closed hollow column using standard bolts, the blind bolt is commonly employed to penetrate the end plates from one side, so as to establish a connection between the crossbeam and the closed hollow column. During the installation of the blind bolt, in order to compress the expansion nut of the blind bolt and enable it to traverse the installation holes on both the end plate and the column, operators must apply sufficient axial thrust to the bolt shank; this process requires substantial physical exertion, imposing a notable operational burden on the operators. TECHNICAL PROBLEM One objective of the embodiments of the present application is to provide a blind bolt installation auxiliary tool, an installation kit, and a method of using the same, to address the technical issue in the prior art where installing the blind bolt requires operators to apply substantial axial thrust to the bolt shank, thereby imposing significant physical exertion and operational burden on the operators. TECHNICAL SOLUTION In an embodiment of the present application, the technical solution adopted is as follows: In a first aspect: a blind bolt installation auxiliary tool is provided, which includes: a clamping assembly including two clamping arms spaced apart and apposite to each other, and an end of each clamping arm is arranged as a clamping end; a connection assembly,both ends of the connection assembly are respectively rotatably connected to the two clamping arms; an elastic member, both ends of the elastic member are respectively connected to the two clamping arms and configured to drive the clamping ends of the two clamping arms toward each other; and a force transmission member, located between the two clamping arms and threaded with the connection assembly. In one embodiment, the two clamping arm is a telescopic structure. In one embodiment,each clamping arm includes a first clamping rod and a second clamping rod telescopically connected for relative displacement. In one embodiment, the first clamping rod is provided with a sleeve hole for accommodating the second clamping rod and a positioning groove in communication with the sleeve hole; the clamping assembly further comprises a positioning member traversing the positioning groove and connected to the second clamping rod to secure the second clamping rod relative to the first clamping rod. In one embodiment, the first clamping rod is provided therein with a sleeve hole for accommodating the second clamping rod, and a positioning groove in communication with the sleeve hole, the positioning groove is extended along a length direction of the first clamping rod; the clamping assembly further comprises a positioning member traversing the positioning groove to secure the second clamping rod relative to the first clamping rod. In one embodiment, the clamping end is connected to a hook bent in a direction toward another clamping arm relative to one clamping arm. In one embodiment, a handle is connected to an end of each clamping arm away from the clamping end. In one embodiment, the connection assembly includes a guide rail and a slider; both ends of the guide rail are respectively rotatably connected to the two clamping arms, and the slider is slidably mounted on the guide rail and movable between the two clamping arms along the guide rail; and the force transmission member is threaded with the slider. In one embodiment, the guide rail is provided with a sliding groove extending along a length direction of the guide rail, and at least a portion of the slider is slidably retained within the sliding groove. In one embodiment, two guide rails are provided, and the two guide rails are spaced apart and apposite to each other, and the clamping arms and slider are positioned between the two guide rails. In one embodiment, the slider is provided with a threaded hole, and the force transmission member is provided with external threads; the force transmission member is inserted through the threaded hole, and the external threads are threaded with the threaded hole. In one embodiment, the force transmission member is a threaded rod or a threaded bolt. In one embodiment, the force transmission member is provided with a rotation head located at an end of the force transmission member away from the clamping end. In one embodiment, the force transmission member is provided with a limiting block located at an end of the force transmission member adjacent to the clamping end, and the limiting block is provided with a limiting hole. In one embodiment, the elastic member is located on a side of the connection assembly facing the clamping end and configured to pull the clamping ends of the two clamping arms toward each other. In a second aspect, an installation kit is provided, which includes a blind bolt and the blind bolt installation auxiliary tool according to any one mentioned above. The blind bolt is configured to be installed on a closed structural member, and the blind bolt installation auxiliary tool is configured to assist installing of the blind bolt; the blind bolt includes a bolt shank; an expansion nut, an intermediate segment, a washer, and a nut sequentially sleeved on the bolt shank; the expansion nut abuts one end of an installation hole in the closed structural member; the washer abuts an opposite end of the installation hole, the intermediate segment is located in a gap formed between the bolt shank and the installation hole; the expansion nut comprises: a first sleeve and a second sleeve, and the second sleeve is arranged inside the first sleeve; an inner wall of the second sleeve is provided with internal threads, the first sleeve comprises a connection segment fixed to the second sleeve and an expansion segment; an inner diameter of the expansion segment is greater than an outer diameter of the second sleeve; the expansion segment extends obliquely outward from an inner circumference in a direction away from the connection segment, and the expansion segment is circumferentially provided with a plurality of strip slots. In one embodiment, the second sleeve is located inside the connection segment, and an axial length of the second sleeve is equal to an axial length of the connection segment. In a third aspect, a method of using the installation kit is provided, which includes following steps: pre-inserting the connection segment of the second sleeve into the installation hole of the closed structural member; clamping the two clamping arms onto the closed structural member using an elastic force of the elastic member, and aligning the force transmission member with one end of the bolt shank; rotating the force transmission member to drive the force transmission member toward the closed structural member, to push the blind bolt traversing the installation hole until: the expansion segment abuts one end of the installation hole, the washer abuts an opposite end of the installation hole, and the intermediate segment fills the gap between the bolt shank and the installation hole; removing the blind bolt installation auxiliary tool from the closed structural member; and tightening the nut to secure the bolt shank to the closed structural member. BENEFICIAL EFFECTS The advantageous effects of the blind bolt installation auxiliary tool provided in the embodiments of the present application are as follows: during auxiliary installing the blind bolt, the clamping ends of the two clamping arms are clamped onto the column under the action of the elastic member, thereby securing the entire auxiliary tool to the column. Through the threaded engagement between the force transmission member and the connection assembly, he force transmission member is rotated to convert its torque into axial force, which facilitates the pushing of the blind bolt through the installation holes in the end plate and column. This mechanism effectively reduces physical exertion by operators and alleviates their operational burden. The advantageous effects of the installation kit provided in the embodiments of the present application are as follows: The blind bolt, utilizing the radially elastic contraction capability of the expansion nut, enables rapid and low-effort passage of the expansion nut through the installation hole, so as to achieve rapid installation. During disassembly, only the nut and the washer needed to be removed from the bolt shank, the bolt shank is then manually rotated until the expansion nut is unscrewed from the bolt shank; that is, the nut, the washer, the bolt shank, and the intermediate segment at the open end of the structural member can be recycled for reuse, minimizing resource waste. With the assistance of the blind bolt installation auxiliary tool, the blind bolt is readily installed into the closed structural member, effectively reducing physical exertion by operators and alleviating their operational workload. The advantageous effects of the method of using the installation kit provided in the embodiments of the present application are as follows: by employing the blind bolt installation auxiliary tool to assist in installing the blind bolt, the blind bolt is readily installed into the closed structural member, effectively reducing physical exertion by operators and alleviating their operational workload; the blind bolt, through the radially elastic contraction capability of the expansion nut, enables rapid and low-effort passage of the expansion nut through the installation hole, thereby achieving repaid installation objectives. DESCRIPTION OF THE DRAWINGS In or to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly describes the accompanying drawings required for the embodiments or exemplary technical descriptions. It is evident that the drawings in the following description are merely some embodiments of the present application. For those of ordinary skill in the art, other drawings can be derived from these drawings without creative effort. FIG. 1 is a schematic perspective view of a blind bolt according to an embodiment of the present application; FIG. 2 is a schematic perspective view of a blind bolt installation auxiliary tool according to an embodiment of the present application; FIG. 3 is a first schematic diagram illustrating an usage state of a blind bolt installation auxiliary tool according to an embodiment of the present application; FIG. 4 is a second schematic diagram illustrating an usage state of a blind bolt installation auxiliary tool according to an embodiment of the present application; FIG. 5 is a third schematic diagram illustrating an usage state of a blind bolt installation auxiliary tool according to an embodiment of the present application; FIG. 6 is a fourth schematic diagram illustrating an usage state of a blind bolt installation auxiliary tool according to an embodiment of the present application; FIG. 7 is an exploded structural schematic view of a blind bolt according to an embodiment of the present application; FIG. 8 is a schematic perspective view of an expansion nut according to an embodiment of the present application; and FIG. 9 is a flowchart illustrating a method of using the installation kit according to an embodiment of the present application. Reference numerals in the drawings: 1-bolt shank; 2-expansion nut; 21 O-first sleeve; 2-second sleeve; 203-connection segment; 204-expansion segment; 205-strip slot; 3-washer; 4-nut; 5-intermediate segment; 100-blind bolt; 200-crossbeam; 201-end plate; 300-column; 10-clamping assembly; 11-clamping arm; Ill-clamping end; 12-first clamping rod; 121-sleeve hole; 122-positioning groove; 13-second clamping rod; 14-positioning member; 15-hook; 16-handle; 20-connection assembly; 21-guide rail; 211-sliding groove; 22-slider; 30-insertion member; 40-limiting member; 50-force transmission member; 51-rotation head; 52-limiting block; and 60-elastic member. DETAILED DESCRIPTION OF EMBODIMENTS In order to render the objectives, technical solutions, and advantages of the present application more comprehensible, the following provides a detailed description of the present application in conjunction with the accompanying drawings and embodiments. It shall be understood that the specific embodiments described herein are intended solely to elucidate the present application and are not to be construed as limiting the scope of the present application. It should be noted that when a component is referred to as being "fixed to" or "arranged on" another component, it can be directly or indirectly attached to the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component. Terms such as "upper," "lower," "left," and "right" indicate directional or positional relationships based on the orientations shown in the accompanying drawings. These terms are used solely for descriptive convenience and do not imply or require that the described device or component must have a specific orientation or be constructed and operated in a specific orientation. Therefore, these terms should not be construed as limiting the scope of the present application. For those of ordinary skill in the art, the specific meanings of these terms can be understood based on practical contexts. The terms "first" and "second" are used for descriptive purposes only and should not be interpreted as indicating relative importance or implicitly specifying the number of technical features. The term "multiple" means two or more, unless explicitly and specifically defined otherwise. In order to explain the technical solutions provided in the present application, the following detailed description is provided in conjunction with specific drawings and embodiments. As shown in FIGS. 2 to 6 collectively. The blind bolt installation auxiliary tool provided in the embodiment of the present application is used to assist in installing the blind bolt 100. Specifically, it is primarily configured to assist in installing the blind bolt 100 shown in FIG. 1. The blind bolt 100 can be applied in construction to connect two structural members. For example, the blind bolt 100 can be used to connect a crossbeam 200 with a pre-welded end plate 201 to a closed hollow column 300 in a building. During installation of the blind bolt 100, the blind bolt installation auxiliary tool provided in the embodiment of the present application can be utilized to achieve labor-saving and safe installation. As shown in FIG. 2. The blind bolt installation auxiliary tool includes a clamping assembly 10, a connection assembly 20, an elastic member 60, and a force transmission member 50. The clamping assembly 10 includes two clamping arms 11 space apart and opposite to each other. One end of each clamping arm 11 is a clamping end 111. The two ends of the connection assembly 20 are rotatably connected to the two clamping arms 11, respectively. The two ends of the elastic member 60 are connected to the two clamping arms 11 and configured to drive the clamping ends 111 of the two clamping arms 11 toward each other. The force transmission member 50 is positioned between the two clamping arms 11 and is threaded to the connection assembly 20. As shown in FIGS. 3 to 6 collectively. During auxiliary installation of the blind bolt 100, the blind bolt 100 is pre-inserted into installation holes on the end plate 201 and the column 300. The clamping ends 111 of the two clamping arms 11 are driven toward each other under the elastic force of the elastic member 60 to clamp onto the column 300 (as shown in FIGS. 3 and 4), and the force transmission member 50 is aligned with the blind bolt 100. By rotating the force transmission member 50 relative to the connection assembly 20, the force transmission member 50 is driven to move toward the column 300, thereby applying axial thrust to the blind bolt 100. This pushes the blind bolt 100 through the installation holes on the end plate 201 and the column 300. Since the maximum outer diameter of the washer 3 is larger than the inner diameter of the installation holes on the end plate 201 and the column 300, when the expansion nut 2 of the blind bolt 100 traverses the installation holes on the end plate 201 and the column 300, the washer 3 of the blind bolt 100 abuts against the end plate 201, and the blind bolt 100 stops moving. The blind bolt installation auxiliary tool is then removed from the column 300. Subsequently, a wrench can be used to apply a preload to the blind bolt 100 for additional reinforcement, as shown in FIGS. 5 and 6. Compared to existing technologies, the blind bolt installation auxiliary tool provided in the present application achieves the following: during auxiliary installing of the blind bolt 100, the clamping ends 111 of the two clamping arms 11 clamp onto the column 300 under the action of the elastic member 60, thereby securing the entire tool to the column 300. Through the threaded engagement between the force transmission member 50 and the connection assembly 20, rotating the force transmission member 50 converts its torque into axial force, which facilitates the pushing of the blind bolt 100 through the installation holes on the end plate 201 and the column 300. This mechanism effectively reduces physical exertion by operators and alleviates their operational workload. As shown in FIG. 2, in one embodiment of the present application, the clamping arm 11 is configured as a telescopic structure. By setting the clamping arm 11 as a retractable structure, that is, the clamping arm 11 can be extended and shortened, the length of the clamping arm 11 can be adjusted according to the thickness of the column 300, which is beneficial to expanding the application range of the blind bolt installation auxiliary tool. Specifically, the clamping arm 11 includes a first clamping rod 12 and a second clamping rod 13 . The first clamping rod 12 and the second clamping rod 13 are telescopically connected and can move relative to each other. By moving the first clamping rod 12 and the second clamping rod 13 relative to each other, the length of the clamping arm 11 can be adjusted. In one embodiment of the present application, a sleeve hole 121 is provided in the first clamping rod 12, and the sleeve hole 121 extends along the length direction of the first clamping rod 12 and traverses both ends of the first clamping rod 12. The sleeve hole 121 is configured for the second clamping rod 13 to traverse. The first clamping rod 12 is also provided with a positioning groove 122, and the positioning groove 122 extends along the length direction of the first clamping rod 12 and is connected to the sleeve hole 121. The clamping assembly 10 also includes a positioning member 14, which is movably passed through the positioning groove 122 and connected to the second clamping rod 13 to fix the second clamping rod 13 on the first clamping rod 12. When the length of the clamping arm 11 needs to be adjusted, the positioning member 14 is loosened or removed to drive the second clamping rod 13 to move relative to the first clamping rod 12. When the clamping arm 11 is adjusted to a preset length, the positioning member 14 is tightened to fix the relative position between the second clamping rod 13 and the first clamping rod 12, so that the clamping arm 11 is maintained at the preset length. Optionally, the positioning member 14 is a bolt or a pin. In another embodiment of the present application, the first clamping rod 12 is provided with an internal thread on the inner wall of the sleeve hole 121, and the second clamping rod 13 is a threaded rod. The second clamping rod 13 is inserted into the sleeve hole 121 and threadedly cooperates with the sleeve hole 121. By rotating the second clamping rod 13 relative to the first clamping rod 12, the length of the clamping arm 11 can be adjusted. In one embodiment of the present application, the clamping end 111 is connected with a hook 15, and the hook 15 is bent relative to the clamping arm 11 toward the other clamping arm 11. Optionally, the hook 15 and the clamping arm 11 form an L shape. Specifically, the hook 15 is located at one end of the second clamping rod 13 and is integrally formed with the second clamping rod 13. By providing the hook 15, the hook 15 is used to clamp on the back of the column 300, which effectively enhances the stability of the clamping assembly 10 clamped and fixed on the column 300, and effectively prevents the blind bolt installation auxiliary tool from being separated from the column 300 under the reaction force of the blind bolt 100, so that the blind bolt installation auxiliary tool can better offset the reaction force generated when the blind bolt 100 is inserted into the installation hole. It can be understood that the blind bolt installation auxiliary tool is clamped on the back of the column 300 by the hook 15, so as to offset the reaction force generated when the blind bolt 100 traverses the installation hole, which is beneficial to further reducing the workload of the operator, and at the same time, it can improve the safety of the high-altitude operations of the operator. In one embodiment of the present application, a handle 16 is connected to one end of the clamping arm 11 away from the clamping end 111. The handle 16 is connected to one end of the second clamping rod 13. Specifically, one end of the handle 16 is inserted into the sleeve hole 121 of the first clamping rod 12, and is fixedly connected to the first clamping rod 12 by a bolt and a nut. By providing the handle 16, it is convenient for the operator to take and place the blind bolt installation auxiliary tool, and at the same time, it is beneficial to open the clamping ends 111 of the two clamping arms 11, so as to facilitate the clamping and fixing of the blind bolt installation auxiliary tool on the column 300 or the removal of the blind bolt installation auxiliary tool from the column 300. Optionally, the handle 16 is in a Z shape, enabling an operator to securely grip both handles 16 with a single hand. In other embodiments, the handle 16 can alternatively adopt an S shape, arc shape, or other shapes. Specifically, when using the blind bolt installation auxiliary tool, the operator grips the handles 16 of the two clamping arms 11 to move the clamping ends 111 of the two clamping arms 11 away from each other until the opening width between the two clamping ends 111 exceeds the width of the column 300. The tool is then positioned such that the two clamping arms 11 are moved to opposite sides of the column 300. When the hook 15 reaches the rear surface of the column 300 (as shown in FIG. 3), the operator gradually releases the gripped handles 16, under the elastic force of the elastic member 60, the clamping ends 111 of the two clamping arms 11 move toward each other to clamp onto the column 300, with the hook 15 engaged on the rear surface of the column 300 (as shown in FIG. 4). In one embodiment, as shown in FIG. 2 again, the two ends of the connection assembly 20 are rotatably connected to the first clamping rods 12 of the two clamping arms 11, respectively, and are positioned adjacent to the handles 16. Specifically, the connection assembly 20 includes a guide rail 21 and a slider 22. The two ends of the guide rail 21 are rotatably connected to the two clamping arms 11. Specifically, one end of the slide rail 21 is rotatably connected to one end of one of the first clamping rods 12 close to the handle 16, and the other end of the slide rail 21 is rotatably connected to one end of the other first clamping rod 12 close to the handle 16. The slider 22 is slidably arranged on the slide rail 21 and can move between the two clamping arms 11 along the slide rail 21. The force transmission member 50 is threaded to the slider 22, so that when the slider 22 can drive the force transmission member 50 to move between the two clamping arms 11 along the slide rail 21, the relative position between the force transmission member 50 and the blind bolt 100 can be adjusted to align the force transmission member 50 with the blind bolt 100 on the column 300 to which the axial thrust needs to be applied. In one embodiment of the present application, a slide groove 211 is provided on the slide rail 21, and the slide groove 211 extends along the length direction of the slide rail 21, and at least part of the slider 22 is slidably disposed in the slide groove 211. In another embodiment of the present application, a slide groove 211 is provided on the slider 22, and the slider 22 is slidably connected with the slide rail 21 through the slide groove 211. Optionally, two slide rails 21 are provided, the two slide rails 21 are space apart and opposite to each other, and the clamping arm 11 and the slider 22 are located between the two slide rails 21. By providing the two slide rails 21, it is beneficial to strengthen the stability of the rotation connection between the connection assembly 20 and the clamping arm 11, and at the same time, it is beneficial to improve the stability of the slider 22 moving between the two clamping arms 11. Optionally, the first clamping rod 12 is provided with a through-hole adjacent to the handle 16. Both ends of the guide rail 21 are provided with connection holes that align with the through-hole. The blind bolt installation auxiliary tool further includes an insertion member 30 and a limiting member 40. The insertion member 30 traverses the connection hole and through-hole that are in communication with each other. The limiting member 40 is connected to one end of the insertion member 30 to prevent disengagement of the insertion member 30 from the connection hole and through-hole. The first clamping rod 12 can pivot relative to the guide rail 21 about the insertion member 30. Optionally, the insertion member 30 can be a pin or cotter pin. In one embodiment, the slider 22 is provided with a threaded hole, and the force transmission member 50 is provided with external threads. The force transmission member 50 is inserted through the threaded hole, with the external threads threaded with the threaded hole of the slider 22. Optionally, the force transmission member 50 can be a threaded rod or bolt. Optionally, a rotation head 51 is provided on the force transmission member 50, and the rotation head 51 is located at an end of the force transmission member 50 away from the clamping end 111. Optionally, the rotation head 51 is an inner hexagonal head or an outer hexagonal head. An electric wrench can be used to act on the rotation head 51 to drive the force transmission member 50 to rotate, or a manual wrench can be used to act on the rotation head 51 to drive the force transmission member 50 to rotate. In one embodiment of the present application, a limiting block 52 is provided on the force transmission member 50, and the limiting block 52 is located at one end of the force transmission member 50 close to the clamping end 111. A limiting hole is provided on the limiting block 52. When the force transmission member 50 acts on the blind bolt 100, one end of the bolt shank 1 of the blind bolt 100 is inserted into the limiting hole, which effectively prevents the force transmission member 50 and the blind bolt 100 from slipping during the process of the force transmission member 50 pushing the blind bolt 100 to move, which is beneficial to ensure the stability of the force transmission member 50 acting on the blind bolt 100. As shown in FIG. 2 again, in one embodiment, the elastic member 60 is positioned on the side of the connection assembly 20 facing the clamping end 111 and adjacent to the connection assembly 20. The elastic member 60 is configured to pull the clamping ends 111 of the two clamping arms 11 toward each other. Specifically, the elastic member 60 is a tension spring connected between the two first clamping rods 12. In another embodiment, the elastic member 60 is positioned on the side of the connection assembly 20 opposite to the clamping end 111. The elastic member 60 is a compression spring, and both ends of the elastic member 60 are respectively connected to the handle 16 for pushing the handles 16 of the two clamping arms 11 away from each other, thereby driving the clamping ends 111 of the two clamping arms 11 to move closer to each other. The blind bolt installation auxiliary tool provides the following benefits: 1. Under the action of the elastic member 60, the blind bolt installation auxiliary tool can be stably clamped and fixed on the column 300, without the need for the operator to support the blind bolt installation auxiliary tool. The force transmission member 50 is threaded to the connection assembly 20, so that when the force transmission member 50 is rotated, the torque of the force transmission member 50 can be converted into an axial force, which makes it easy to push the blind bolt 100 through the installation holes on the end plate 201 and the column 300, thus the physical exertion of the operator is effectively reduced and it is beneficial to reduce the workload of the operator. 2. The blind bolt installation auxiliary tool is clamped on the back of the column 300 through the hook 15, which can better replace the operator to offset the reaction force generated when the blind bolt 100 is inserted into the installation hole, which is beneficial to further reducing the workload of the operator and improving the safety of the high-altitude operations of the operator. 3. By setting the clamping arm 11 as a retractable structure, the length of the clamping arm 11 can be adjusted according to the thickness of the column 300, so that it can be applied to columns 300 of different widths, which is beneficial to expanding the scope of application of the blind bolt installation auxiliary tool and improving the practicality of the blind bolt installation auxiliary tool. 4. The slider 22 is slidably mounted on the slide rail 21, so that when the slider 22 drives the force transmission member 50 to move along the slide rail 21 between the two clamping arms 11, the relative position between the force transmission member 50 and the blind bolt 100 is adjusted, so that the force transmission member 50 is aligned with the blind bolt 100 on the column 300 to which an axial thrust is required. In this way, multiple blind bolts 100 at the same level can be assisted in installation without removing the blind bolt installation auxiliary tool, which is beneficial to further saving manpower and reducing the workload of operators. As shown in FIGS. 3 to 6 collectively, an embodiment of the present application further provides an installation kit,which includes a blind bolt 100 and the blind bolt installation auxiliary tool according to any one of the preceding embodiments. The blind bolt 100 is configured to be installed in a closed structural member, and the blind bolt installation auxiliary tool is configured to assist in the installation of the blind bolt 100. As shown in FIGS. 1 and 7 collectively, the blind bolt 100 includes a bolt shank 1, and an expansion nut 2, an intermediate segment 5, a washer 3, and a nut 4 sequentially sleeved on the bolt shank 1. The expansion nut 2 abuts one end of an installation hole in the closed structural member, and the washer 3 abuts the other end of the installation hole. Specifically, the closed structural member comprises at least two components, with the installation hole penetrating through each component. During use, the expansion nut 2 is located on one side of the closed structural member, and the nut 4 is located on the opposite side. For example, when the components include a crossbeam 200 with a pre-welded end plate 201 and a closed hollow column 300, the end plate 201 is adhered to the outer wall of the closed hollow column 300. The expansion nut 2 is located on the side adjacent to the inner wall of the closed hollow column 300, while the nut 4 is located on the side of the end plate 201 opposite to the closed hollow column 300. The nut 4 is tightened to secure the bolt shank 1 to the closed structural member, thereby achieving the fastening function of the blind bolt 100. The outer diameter of the washer 3 is larger than the inner diameter of the installation hole on the closed structural member, which can increase the contact area between the nut 4 and the closed structural member to ensure the firmness of the connection of the blind bolt 100. The intermediate segment 5 is located in a gap formed between the bolt shank 1 and the installation hole. It is understood that to ensure stable contact between the bolt shank 1 and the installation hole, so as to prevent wobbling of the bolt shank 1 within the installation hole, and guarantee connection integrity, the intermediate segment 5 fills the gap between the bolt shank 1 and the installation hole, thereby securing the bolt shank 1. Optionally, the axial length of the intermediate segment 5 equals the axial length of the installation hole, that is, the two ends of the intermediate segment 5 are flush with the two ends of the installation hole. This ensures uniform circumferential contact between the expansion nut 2 and the closed structural member, as well as even circumferential abutment of the washer 3 against one end of the closed structural member, thereby enhancing the mechanical stability of the blind bolt 100. In one embodiment of the present application, the intermediate segment 5 and the washer 3 are integrally formed. In other embodiments, the intermediate segment 5 and the washer 3 can be separately formed. As shown in FIG. 8, the expansion nut 2 includes a first sleeve 210 and a second sleeve 202. The second sleeve 202 is located inside the first sleeve 210, and the inner wall of the second sleeve 202 is provided with internal threads. The first sleeve 210 includes a connection segment 203 and an expansion segment 204. The connection segment 203 is fixedly connected to the second sleeve 202. The inner diameter of the expansion segment 204 is greater than the outer diameter of the second sleeve 202. The expansion segment 204 extends obliquely outward from the inner circumference in a direction away from the connection segment 203. The expansion segment 204 is circumferentially provided with multiple strip slots 205, enabling the expansion segment 204 to exhibit elasticity and undergo radial contraction. During use, the expansion nut 2 is threaded onto the bolt shank 1 via the second sleeve 202. The radially contractible property of the expansion segment 204 allows the expansion nut 2 to traverse the installation hole in the closed structural member. After the expansion nut 2 traverses the installation hole, the expansion segment 204 elastically returns to its original shape. Since the outer diameter of the expansion segment 204 at a position distal from the connection segment 203 exceeds the inner diameter of the installation hole, the expansion segment 204 cannot reversely traverse the installation hole. Consequently, the expansion segment 204 abuts against one side of the closed structural member, thereby securing one end of the bolt shank 1. In one embodiment of the present application, the second sleeve 202 is located inside the connection segment 203, and the axial length of the second sleeve 202 is equal to the axial length of the connection segment 203. This configuration reduces material consumption and manufacturing complexity, thereby lowering the production cost of the blind bolt 100. It should be noted that since the second sleeve 202 is fixedly connected to the connection segment 203 without a distinct boundary, the portion with an inner diameter smaller than that of the expansion segment 204 is defined as the entire second sleeve 202. The portion outside the second sleeve 202 is designated as the connection segment 203, and the connection segment 203 has a thickness equal to that of the expansion segment 204. In another embodiment, the axial length of the second sleeve 202 equals that of the first sleeve 210. The two ends of the second sleeve 202 extend to the ends of the connection segment 203 and expansion segment 204, respectively, the threaded engagement length between the second sleeve 202 and the bolt shank 1 can be increased to ensure robust connection between the expansion nut 2 and the bolt shank 1. It is noted that due to the fixed connection between the connection segment 203 and the second sleeve 202, the outer diameter of the second sleeve 202 portion within the expansion segment 204 defines the outer diameter of the entire second sleeve 202. That is, the portion of the second sleeve 202 extending out of the end of the connection segment 203 has the same outer diameter as the portion of the second sleeve 202 located inside the connection segment 203, and the portion outside the second sleeve 202 serves as the connection segment 203. Those skilled in the art will recognize that the axial length of the second sleeve 202 can also be shorter than that of the first sleeve 210 but longer than that of the connection segment 203, that is, the second sleeve 202 resides entirely within the expansion segment 204. Specifically, four to six strip slots 205 are provided. If the number of the strip slots 205 is less than six, the elasticity of the expansion segment 204 is too small. When the expansion segment 204 traverses the installation hole, a large force is required, it may even fail to traverse the installation hole due to its small elasticity and small radial contraction. If the number of the strip slots 205 is greater than six, it will increase the process steps and also cause the strength of the expansion segment 204 to decrease. When the expansion segment 204 rests against one end of the installation hole, it will not be able to firmly fix the bolt shank 1. In this embodiment, the axial length of the strip slot 205 is equal to the axial length of the expansion segment 204, which can further ensure the elasticity of the expansion segment 204 and ensure that the expansion segment 204 can undergo sufficient radial deformation. The strip slots 205 are arranged parallel to the central axis of the expansion segment 204, which also ensures the deformation of the expansion segment 204 in the radial direction and prevents the expansion segment 204 from deforming in other directions when traversing the installation hole. When the expansion nut 2 traverses the installation hole, the expansion segment 204 of the first sleeve 210 abuts against the closed structural member, so that one end of the bolt shank 1 is fixed in the installation hole. In order to ensure the firmness of the abutment between the expansion segment 204 and the closed structural member, the first sleeve 210 is made of stainless steel. Since stainless steel is elastic, the elastic performance of the expansion segment 204 can also be ensured at this time. In other embodiments, the material of the first sleeve 210 can also be high-strength steel. The material of the first sleeve 210 is not limited to the materials mentioned above, and other high-strength and ductile materials commonly used in the field are applicable to the present application. In one embodiment of the present application, the inclination angle of the expansion segment 204 is ranged from 2° to 30° , optionally, ranged from 5° to 10°. Under this inclination angle, combined with the material of stainless steel, it can be ensured that the expansion segment 204 undergoes a suitable deformation in the radial direction, and the operator can apply a suitable thrust to pass the expansion nut 2 through the installation hole, and after completely traversing the installation hole, it can be stably abutted against the closed structural member to ensure the firmness of the connection between the bolt shank 1 and the installation hole. The "inclination angle of the expansion segment 204" mentioned in the present application is the acute angle between the side wall of the cross section of the expansion segment 204 and its central axis. When the expansion nut 2 traverses the installation hole, the connection segment 203 first enters the installation hole and guides the expansion segment 204 to sequentially traverse the hole. In order to ensure the guiding function of the connection segment 203 such that the connection segment 203 can smoothly traverse the installation hole, an arc chamfer is provided at the end of the connection segment 203 away from the expansion segment 204. When the arc chamfer traverses the installation hole, it can smoothly connect with the inner wall of the installation hole, the guiding function is well and the purpose of rapid installation can be achieved. Moreover, the arc chamfer can also avoid stress concentration in the connection segment 203 and ensure the strength of the connection segment 203. In some embodiments, during installation of the blind bolt 100: the bolt shank 1 leads the expansion nut 2 through the installation hole. The intermediate segment 5, the washer 3, and the nut 4 are sequentially sleeved onto the bolt shank 1. By gripping the exposed portion of the bolt shank 1 and using a wrench to tighten the nut 4, the blind bolt 100 achieves its fastening function. Therefore, the axial length of the bolt shank 1 needs to be greater than the sum of the lengths of the expansion nut 2, the washer 3, the intermediate segment 5 and the nut 4, so that the bolt shank 1 has an exposed and grippable portion. In the embodiment, the bolt shank 1 is a solid structure with high strength, guaranteeing superior mechanical performance of the blind bolt 100. The blind bolt 100 provided in the embodiment is a detachable blind bolt. Specifically, when the blind bolt 100 needs to be removed from the closed structural member, the nut 4 and the washer 3 are removed in sequence, and then the bolt shank 1 is pulled by hand to rotate until the expansion nut 2 is unscrewed from the bolt shank 1, and then the bolt shank 1 is taken out, and finally the intermediate segment 5 located in the installation hole is taken out. Therefore, the bolt shank 1, the nut 4, the washer 3 and the intermediate segment 5 can be reused, reducing the waste of materials. The installation kit of the present application has at least the following beneficial effects: 1. The blind bolt 100 can be radially elastically contracted by the expansion nut 2, so that the expansion nut 2 can traverse the installation hole quickly and labor-savingly, thereby achieving the purpose of rapid installation; and the expansion nut 2 has a simple structure and is easy to operate, which can greatly save time and manpower and material costs during installation. 2. When disassembly is required, it is only necessary to remove the nut 4 and the washer 3 from the bolt shank 1, and then pull the bolt shank 1 by hand to rotate until the expansion nut 2 is unscrewed from the bolt shank 1, that is, the nut 4, the washer 3, the bolt shank 1 and the intermediate segment 5 located at the open end of the structural member can be recycled and reused, reducing the waste of resources. 3. With the assistance of the blind bolt installation auxiliary tool, it is easy to install the blind bolt 100 on the closed structural member, the physical exertion of the operator is effectively reduced, which is beneficial to reducing the workload of the operator and improving the safety of the high-altitude operations of the operator. As shown in FIG. 9, a method of using the installation kit of any preceding embodiment, and the method includes the following steps: In a step S10: the connection segment 203 of the second sleeve 202 is pre-inserted into the installation hole of the closed structural member (as shown in FIGS. 3-4). By way of example, the closed structural member includes two components: a crossbeam 200 with a pre-welded end plate 201 and a closed hollow column 300. The installation hole traverses the end plate 201 and the sidewall of the closed hollow column 300. The connection segment 203 of the second sleeve 202 is pre-inserted into the installation hole from the side of the end plate 201. In a step S20: the two clamping arms 11 are clamped on the closed structure using the elastic force of the elastic member 60, to align the force transmission member 50 correspond to one end of the bolt shank 1. The specific steps are as follows: In a step S21: the operator can hold the handles 16 of the two clamping arms 11 tightly to move the clamping ends 111 of the two clamping arms 11 away from each other until the opening width between the two clamping ends Illis larger than the width of the closed structure(as shown in FIG. 3). In a step S22: the blind bolt installation auxiliary tool is moved to move the two clamping arms 11 to the opposite sides of the column 300 respectively. When the hook 15 moves to the back of the column 300, the gripped handle 16 is slowly released, the clamping ends 111 of the two clamping arms 11 approach each other under the action of the elastic member 60 and are clamped on the column 300, and the hook 15 is clamped on the back of the column 300(as shown in FIG. 4). In a step S23 : the slider 22 is moved , and the slider 22 moves along the slide rail 21 between the two clamping arms 11 with the force transmission member 50 until the force transmission member 50 is aligned with one end of the bolt shank 1 of the blind bolt 100. In a step S30: the force transmission member 50 is rotated to drive it toward the closed structural member, the blind bolt 100 is pushed through the installation hole until: the expansion segment 204 abuts one end of the installation hole; the washer 3 abuts the opposite end; the intermediate segment 5 fills the gap between the bolt shank 1 and the installation hole (as shown in FIGS. 5-6). Specifically, the force transmission member 50 is rotated relative to the connection assembly 20 to move the force transmission member 50 toward the closed structural member, so as to apply an axial thrust to the blind bolt 100 and push the blind bolt 100 through the installation hole. The expansion segment 204 radially contracts and deforms in the process of traversing the installation hole. After the expansion segment 204 traverses the installation hole, the expansion segment 204 returns to its original state under the action of elastic force. Since the outer diameter of the expansion segment 204 away from the connection segment 203 is larger than the inner diameter of the installation hole, the expansion segment 204 cannot traverse the installation hole in the reverse direction, so that the expansion segment 204 abuts against one side of the closed structural member. Since the maximum outer diameter of the washer 3 is larger than the inner diameter of the installation hole, the washer 3 abuts against the other side of the closed structural member. The intermediate segment 5 fills the gap formed by the bolt shank 1 and the installation hole, and the blind bolt 100 stops moving. In a step S40: the blind bolt installation auxiliary tool is removed from the closed structural member. The specific steps are as follows:: In a step S41: the operator can hold the handles 16 of the two clamping arms 11 tightly to move the clamping ends 111 of the two clamping arms 11 away from each other until the opening width between the two clamping ends Illis greater than the width of the column 300. In a step S42: the blind bolt installation auxiliary tool is moved to disengage the two clamping arms 11 from the column 300. In a step S43: the handle 16 is released, and the two clamping arms 11 are reset under the elastic force of the elastic member 60. In a step S50: the nut 4 is tightened to secure the bolt shank 1 on the closed structural member. Specifically, the nut 4 is tightened to secure the bolt shank 1 to the closed structural member, thereby achieving the fastening function of the blind bolt 100. The method of using the installation kit provides the following benefits: 1. By using a blind bolt installation auxiliary tool to assist in the installation of the blind bolt 100, it is easy to install the blind bolt 100 on the closed structural member, the physical exertion of the operator is effectively reduced, which is beneficial to reducing the workload of the operator. 2. The blind bolt 100 utilizes the radially elastic contraction capability of the expansion nut 2, which enables rapid and low-effort passage of the expansion nut 2 through the installation hole, thereby achieving swift installation. The foregoing embodiments are merely illustrative of the present application and are not intended to limit its scope. For those skilled in the art, various modifications and variations can be made to the present application. Any amendments, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be encompassed within the scope of the claims of the present application.

Claims

1. A blind bolt installation auxiliary tool, characterized by comprising:a clamping assembly, comprising two clamping arms spaced apart and apposite to each other, wherein an end of each clamping arm is arranged as a clamping end;a connection assembly, wherein both ends of the connection assembly are respectively rotatably connected to the two clamping arms;an elastic member, wherein both ends of the elastic member are respectively connected to the two clamping arms and configured to drive the clamping ends of the two clamping arms toward each other; anda force transmission member, located between the two clamping arms and threaded with the connection assembly.2.The blind bolt installation auxiliary tool according to claim 1, characterized in that: the two clamping arms are telescopic structures.3.The blind bolt installation auxiliary tool according to claim 2, characterized in that: each clamping arm comprises a first clamping rod and a second clamping rod telescopically connected for relative displacement.4.The blind bolt installation auxiliary tool according to claim 3, characterized in that: the first clamping rod is provided with a sleeve hole for accommodating the second clamping rod and a positioning groove in communication with the sleeve hole; the clamping assembly further comprises a positioning member traversing the positioning groove and connected to the second clamping rod to secure the second clamping rod relative to the first clamping rod.5.The blind bolt installation auxiliary tool according to claim 4, characterized in that: the first clamping rod is provided therein with a sleeve hole for accommodating the second clamping rod, and a positioning groove in communication with the sleeve hole, the positioning groove is extended along a length direction of the first clamping rod; the clamping assembly further comprises a positioning member traversing the positioning groove to secure the second clamping rod relative to the first clamping rod.6.The blind bolt installation auxiliary tool according to claim 1, characterized in that: the clamping end is connected to a hook bent in a direction toward another clamping arm relative to one clamping arm.7.The blind bolt installation auxiliary tool according to claim 1, characterized in that: a handle is connected to an end of each clamping arm away from the clamping end.8.The blind bolt installation auxiliary tool according to claim 1, characterized in that: the connection assembly comprises a guide rail and a slider; both ends of the guide rail are respectively rotatably connected to the two clamping arms, and the slider is slidably mounted on the guide rail and movable between the two clamping arms along the guide rail; and the force transmission member is threaded with the slider.9.The blind bolt installation auxiliary tool according to claim 8, characterized in that: the guide rail is provided with a sliding groove extending along a length direction of the guide rail, and at least a portion of the slider is slidably retained within the sliding groove.10.The blind bolt installation auxiliary tool according to claim 8, characterized in that: two guide rails are provided, and the two guide rails are spaced apart and apposite to each other, and the clamping arms and slider are positioned between the two guide rails.11.The blind bolt installation auxiliary tool according to claim 8, characterized in that: the slider is provided with a threaded hole, and the force transmission member is provided with external threads; the force transmission member is inserted through the threaded hole, and the external threads are threaded with the threaded hole.12.The blind bolt installation auxiliary tool according to claim 11, characterized in that: the force transmission member is a threaded rod or a threaded bolt.13.The blind bolt installation auxiliary tool according to claim 1, characterized in that: the force transmission member is provided with a rotation head located at an end of the force transmission member away from the clamping end.14.The blind bolt installation auxiliary tool according to claim 1, characterized in that: the force transmission member is provided with a limiting block located at an end of the force transmission member adjacent to the clamping end, and the limiting block is provided with a limiting hole.15.The blind bolt installation auxiliary tool according to claim 1, characterized in that: the elastic member is located on a side of the connection assembly facing the clamping end and configured to pull the clamping ends of the two clamping arms toward each other.

16. An installation kit, characterized by comprising: a blind bolt; and the blind bolt installation auxiliary tool according to any one of claims 1-15; wherein the blind bolt is configured to be installed on a closed structural member, and the blind bolt installation auxiliary tool is configured21to assist installing of the blind bolt;wherein the blind bolt comprises: a bolt shank, and an expansion nut, an intermediate segment, a washer, and a nut sequentially sleeved on the bolt shank; the expansion nut abuts one end of an installation hole in the closed structural member; the washer abuts an opposite end of the installation hole, the intermediate segment is located in a gap formed between the bolt shank and the installation hole; the expansion nut comprises a first sleeve and a second sleeve; the second sleeve is arranged inside the first sleeve, an inner wall of the second sleeve is provided with internal threads, the first sleeve comprises a connection segment fixed to the second sleeve and an expansion segment; an inner diameter of the expansion segment is greater than an outer diameter of the second sleeve; the expansion segment extends obliquely outward from an inner circumference in a direction away from the connection segment, and the expansion segment is circumferentially provided with a plurality of strip slots.17.The installation kit according to claim 16, characterized in that: the second sleeve is located inside the connection segment, and an axial length of the second sleeve is equal to an axial length of the connection segment.

18. A method of using the installation kit according to claim 16, characterized by comprising following steps:pre-inserting the connection segment of the second sleeve into the installation hole of the closed structural member;clamping the two clamping arms onto the closed structural member using an elastic force of the elastic member, and aligning the force transmission member with one end of the bolt shank;rotating the force transmission member to drive the force transmission member toward the closed structural member, to push the blind bolt traversing the installation hole until: the expansion segment abuts one end of the installation hole, the washer abuts an opposite end of the installation hole, and the intermediate segment fills the gap between the bolt shank and the installation hole;removing the blind bolt installation auxiliary tool from the closed structural member; and tightening the nut to secure the bolt shank to the closed structural member.A. CLASSIFICATION OF SUBJECT MATTERB25B27 / 14(2006.01)i; F16B13 / 06(2006.01)iAccording to International Patent Classification (IPC) or to both national classification and IPCB. FIELDS SEARCHEDMinimum documentation searched (classification system followed by classification symbols) IPC:B25B F16BDocumentation searched other than minimum documentation to the extent that such documents are included in the fields searchedElectronic data base consulted during the international search (name of data base and, where practicable, search terms used)ENTXT, ENTXTC, VEN, CNTXT: ft, ft, ft, Xft, XM, 1^, W, ft, ft, M, W, ft®, 30, bolt?, screw?, pin?, install+, tool?, clamp+, ami?, jaw?, slid+, telescopic, spring?.DOCUMENTS CONSIDERED TO BE RELEVANTCategory* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. PX CN 218837647 U (THE HONG KONG POLYTECHNIC UNIVERSITY) 11 April 2023 (2023-04-11) description, paragraphs [0002]-[0059], and figures 1-6 1-18 Y CN 113976952 A (HUDONG-ZHONGHUA SHIPBUILDING (GROUP) CO., LTD.) 28 January 2022 (2022-01-28) description, paragraphs [0004]-[0026], and figures 1-3 1-18 Y CN 2299112 Y (SHAO SHILEI) 02 December 1998 (1998-12-02) description, paragraphs 1-9, and figures 1-2 1-18 Y CN 217207201 U (THE HONG KONG POLYTECHNIC UNIVERSITY) 16 August 2022 (2022-08-16) description, paragraphs [0004]-[0043], and figures 1-13 16-18 A CN 209831501 U (JINCHENG HUAGANG GAS CO., LTD.) 24 December 2019 (2019-12-24) entire document 1-18 A CN 210678526 U (JIASHAN GUWEI FASTENER CO., LTD.) 05 June 2020 (2020-06-05) entire document 1-18| | Further documents are listed in the continuation of Box C.annex.* Special categories of cited documents:“A” document defining the general state of the art which is not considered to be of particular relevance“D” document cited by the applicant in tire international application“E” earlier application orpatent but published on or after the international“T”“O”“P”filing datedocument which may throw doubts on priority claim(s) or which is cited to establish the publication date of another citation or other special reason (as specified)document referring to an oral disclosure, use, exhibition or other meansdocument published prior to the international filing date but later than the priority date claimed‘Y’later document published after the international filing date or priority date and not in conflict with the application but cited to understand the principle or theory underlying the inventiondocument of particular relevance; the claimed invention cannot be considered novel or cannot be considered to involve an inventive step when the document is taken alonedocument of particular relevance; the claimed invention cannot be considered to involve an inventive step when the document is combined with one or more other such documents, such combination being obvious to a person skilled in the artdocument member of the same patent familyDate of the actual completion of the international searchDate of mailing of the international search report01 February 202422 February 2024Name and mailing address of the ISA / CNChina National Intellectual Property Administration (ISA / CN)China No. 6, Xitucheng Road, Jimenqiao, Haidian District,Beijing 100088Authorized officerTelephone No.C. DOCUMENTS CONSIDERED TO BE RELEVANT Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. A KR 20180069515 A (KIM BAEK GI et al.) 25 June 2018 (2018-06-25) entire document 1-18 A TW M468362 U (CHEN YAO-YU AN) 21 December 2013 (2013-12-21) entire document 1-18PCT / CN2023 / 134348Patent document cited in search report Publication date (day / month / year) Patent family member)s) Publication date (day / month / year) CN 218837647 U 11 April 2023 None CN 113976952 A 28 January 2022 None CN 2299112 Y 02 December 1998 None CN 217207201 U 16 August 2022 None CN 209831501 U 24 December 2019 None CN 210678526 U 05 June 2020 None KR 20180069515 A 25 June 2018 KR 101931144 Bl 20 December 2018 TW M 468362 U 21 December 2013 None

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