Universal auxiliary tool for installing expansion bolt

Abstract

The utility model provides a general auxiliary tool for installing an expansion bolt, which comprises a connecting rod, a working sleeve, a magnetic attraction assembly and an elastic piece, and one end of the connecting rod is provided with a first connecting structure matched with a bit connecting groove of a percussion drill / electric hand drill; one end of the working sleeve is connected with the connecting rod, and the other end of the working sleeve is provided with an inner clamping groove matched with the expansion bolt nut; the magnetic attraction assembly is slidably arranged in the mounting groove, the end of the bolt is attracted through the magnetic attraction part, and a limiting structure is arranged to control the sliding distance. And the elastic piece enables the magnetic attraction part to keep an outward elastic trend. Drilling, knocking and tightening procedures are integrated through standardized connection, the problems that in traditional installation, tool switching is tedious, and falling is prone to occurring during high-altitude operation are solved, installation efficiency and safety are remarkably improved, and stable adsorption of the expansion bolt is guaranteed through cooperation of a magnetic attraction assembly and an annular magnet and spring pre-pressing structure; in addition, the conversion piece is arranged to be matched with different drill bit connectors, and universality is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of expansion bolt installation tool, and particularly to a general auxiliary tool for expansion bolt installation. BACKGROUND

[0002] In the field of object fixation and instrument installation, screw is a commonly used fastener, among which expansion screw is widely used in wall hanging scenarios (such as air conditioner, range hood, etc.) due to its excellent bearing capacity. Compared with traditional screw, expansion screw can bear 180-240 kg of pulling force after installation, significantly improving the fixation reliability.

[0003] At present, the installation of expansion screw usually needs to be completed in steps: first, use impact drill to drill holes in the wall, then use hammer to knock expansion screw into the hole, and finally tighten the bolt with wrench to make it expand and fix in the hole. However, the traditional installation method has the following defects:

[0004] 1. Tool switching is complicated, and impact drill, hammer and wrench need to be frequently replaced during the process, resulting in low operation efficiency, especially when installing in batches;

[0005] 2. High-altitude operation is inconvenient, when the ceiling and other narrow spaces can only be operated with one hand, there is lack of effective first connecting structure between expansion screw and tool, which increases the installation difficulty and even causes safety hazards due to dislocation and falling.

[0006] Therefore, there is an urgent need for an expansion screw installation scheme that can simplify the operation process, improve the installation efficiency and prevent the screw from falling off.

[0007] Therefore, the present application is produced in view of the above problems. CONTENT OF THE UTILITY MODEL

[0008] In order to solve the above problems, the technical scheme of the utility model is as follows:

[0009] A general auxiliary tool for expansion bolt installation, comprising:

[0010] A connecting rod having a first connecting structure at one end for connecting and cooperating with the head connection groove of impact drill or hand drill;

[0011] A working sleeve connected to the connecting rod at one end, and the end face of the other end forms an inner clamping groove for limiting cooperation with the nut of expansion bolt, and the inner bottom of the inner clamping groove is provided with a mounting groove along the extension direction of the working sleeve;

[0012] A magnetic attraction assembly is slidably arranged in the mounting groove along the extension direction of the working sleeve and has a magnetic attraction part extending to the bottom of the inner clamping groove, and the magnetic attraction assembly is provided with a limiting structure for limiting the sliding distance of the magnetic attraction assembly in the mounting groove;

[0013] The elastic member is arranged between the magnetic assembly and the mounting groove, and is used for elastically contacting the magnetic assembly to keep the magnetic attraction part of the magnetic assembly away from the inner bottom of the mounting groove.

[0014] Preferably, the mounting groove is cylindrical, and a limiting clamping edge is formed by reducing the diameter of the side of the mounting groove close to the inner clamping groove, and a connecting hole is formed in the middle of the limiting clamping edge and communicates with the mounting groove and the inner clamping groove.

[0015] Preferably, the magnetic assembly is columnar, the limiting structure is a limiting disc arranged around the side of the magnetic assembly, and the limiting disc is in limiting cooperation with the inner side wall of the limiting clamping edge.

[0016] Preferably, a fixing hole is formed in the center of the limiting disc, a threaded connecting section is arranged on the outer side of the magnetic assembly, and the fixing hole is in threaded cooperation with the threaded connecting section.

[0017] Preferably, the limiting disc is cut by two parallel chords with the same diameter to form limiting surfaces on two opposite sides of the limiting disc, the connecting hole is symmetrically provided with limiting edges which cooperate with the two limiting surfaces to form a complete disc structure, and a limiting clamping groove which is adapted to the shape of the limiting disc is formed between the two limiting edges.

[0018] Preferably, the end surface of the limiting disc extends perpendicularly around the side of the fixing hole to form a limiting ring wall, and a first limiting groove is formed by the inner side of the limiting ring wall.

[0019] Preferably, the elastic member is a spring, the spring is movably arranged in the first limiting groove and is sleeved on the outer side of the magnetic assembly, and the other end of the spring movably contacts the inner bottom of the mounting groove.

[0020] Preferably, the position close to the inner bottom of the mounting groove is formed by reducing the diameter to form a coaxially distributed second limiting groove, and an inclined annular guide surface is arranged between the second limiting groove and the inner side wall of the mounting groove.

[0021] Preferably, the magnetic attraction part is an annular magnet, and the middle part of the annular magnet is limited to the end of the magnetic assembly to form a magnetic attraction contact surface facing the inner clamping groove.

[0022] Preferably, the utility model further comprises a conversion member, the conversion member comprises a connecting end and an adapter end which are coaxially and integrally connected, a second connecting structure is arranged on the end of the connecting end, the adapter end is provided with a quick connection structure, the quick connection structure is used for quickly connecting the first connecting structure to form coaxial connection of the conversion member and the connecting rod, and the second connecting structure is used for connecting and cooperating with the bit slot of the impact drill or the electric drill which is different from the first connecting structure.

[0023] The utility model has the following beneficial effects:

[0024] The utility model discloses a standardization connecting rod realizes the quick adaptation with impact drill / hand electric drill, and the drilling, knocking and tightening procedure in the expansion bolt installation process is integrated to the single tool, eliminates the complicated process of tool switching in traditional installation, and fully promotes the installation efficiency of expansion bolt.

[0025] In addition, through the cooperation of the magnetic attraction assembly and the elastic member, temporary adsorption force can be generated on the end of the expansion bolt during the installation process to fix the end in the inner clamping groove and keep a stable posture, avoiding the expansion bolt from falling off the inner clamping groove in the case of one-hand operation, and fully improving the stability and safety of the expansion bolt installation.

[0026] Meanwhile, the spring pre-pressing structure can ensure that the magnetic attraction part always maintains the optimal contact distance, so that the expansion bolt can be magnetically attracted at the first time when being placed in the inner clamping groove, thereby stably keeping the expansion bolt in the inner clamping groove and reducing the security risks of falling. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which are included to provide a further understanding of the utility model and constitute a part of the utility model, illustrate the illustrative embodiments of the utility model and the description thereof, and do not constitute an improper limitation on the utility model.

[0028] Among them:

[0029] Figure 1 It is the two kinds of auxiliary tool three-dimensional structure schematic diagram of the utility model embodiment one with long type and short type connecting rod;

[0030] Figure 2 It is the three-dimensional structure schematic diagram of the utility model embodiment one;

[0031] Figure 3 It is the sectional structure schematic diagram of the utility model embodiment one;

[0032] Figure 4 It is one of the local sectional view and explosion structure schematic diagram of the utility model embodiment one;

[0033] Figure 5 It is the second local sectional view and explosion structure schematic diagram of the utility model embodiment one;

[0034] Figure 6 It is the local structure schematic diagram of the utility model embodiment one highlighting work sleeve;

[0035] Figure 7 It is the local structure schematic diagram of the utility model embodiment one highlighting limiting disc;

[0036] Figure 8is a three-dimensional structure schematic diagram of two auxiliary tools with long and short connecting rods in the embodiment one of the utility model;

[0037] Figure 9 is a three-dimensional structure schematic diagram of the embodiment two of the utility model;

[0038] Figure 10 is a use process state change schematic diagram of the adapter in the embodiment two of the utility model;

[0039] Figure 11 is a use state three-dimensional structure schematic diagram of the embodiment one of the utility model;

[0040] Figure 12 is a use state sectional structure schematic diagram of the embodiment one of the utility model;

[0041] Figure 13 is one of the utility model's real object reference drawings;

[0042] Figure 14 is the second utility model's real object reference drawing.

[0043] Label explanation:

[0044] 100, connecting rod; 110, first connecting structure; 111, connecting clamping groove; 112, positioning groove; 200, working sleeve; 210, inner clamping groove; 220, installation groove; 230, protective coating; 240, limiting clamping edge; 241, connecting hole; 242, limiting edge; 243, limiting clamping groove; 250, second limiting groove; 251, annular guide surface; 300, magnetic attraction assembly; 310, magnetic attraction part; 311, installation clamping groove; 320, limiting disc; 321, fixed hole; 322, limiting surface; 323, limiting ring wall; 324, first limiting groove; 330, threaded connection section; 400, elastic piece; 500, conversion piece; 510, connecting end; 511, second connecting structure; 520, adapter end; 521, quick connection structure; 600, expansion bolt; 610, nut; 700, electric drill. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical schemes and beneficial effects to be solved in the utility model more clear, apparent, the following is combined with the drawings and the embodiment, and the utility model is further described in detail.It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model. Embodiment one

[0046] Please refer to Figures 1 to 7, it is a kind of general auxiliary tool for the installation of expansion bolt 600, including connecting rod 100, working sleeve 200, magnetic assembly 300 and elastic member 400, wherein, connecting rod 100 and working sleeve 200 are integrated coaxial connection, the specific implementation is as follows:

[0047] As Figure 1 , 2 Indicated, connecting rod 100 is round bar, and the length direction of one end has first connecting structure 110, in the embodiment, first connecting structure 110 is the head connection structure with hexagonal section and with connecting slot 111, consistent with the connecting structure of the standardization of the commonly seen on the market electric drill 700 head, so that it can be conveniently connected to the head slot of electric drill 700, and is used with electric drill 700.

[0048] As Figure 3 , 4 Indicated, working sleeve 200 is cylindrical, and the outer diameter is greater than the outer diameter of connecting rod 100, and the working sleeve 200 is welded and fixed at the end of connecting rod 100 away from first connecting structure 110 in the axial direction, and the end face of the other end of working sleeve 200 is recessed to form inner clamping groove 210 matched with the nut 610 of expansion bolt 600, and the inner bottom of inner clamping groove 210 is provided with mounting groove 220 along the extension direction of working sleeve 200.

[0049] Specifically, in the embodiment, the inner hexagonal shape is adapted to the shape and size of the nut 610 on the commonly seen expansion bolt 600, so that it is convenient to cooperate with electric drill 700 to tighten and fix expansion bolt 600.

[0050] In some other embodiments, the inner hexagonal shape can be changed to special shape, such as plum blossom shape, only the shape of the nut 610 of the corresponding expansion bolt 600 needs to be adapted, and the size and shape are adaptively changed according to the specifications of the commonly seen expansion bolt 600.

[0051] Combined Figure 1 , in order to conveniently adapt to different working conditions, such as narrow installation environment, the type of connecting rod 100 can also be designed as short type and long type in the embodiment, the length of short connecting rod 100 is 5cm, and the length of long connecting rod 100 is 10cm or more, so as to adapt to different installation conditions.

[0052] Particularly, in order to enhance the durability of the auxiliary tool as a whole, a protective coating 230 is coated on the outer side wall of working sleeve 200, and in the embodiment, the protective coating 230 is corrosion-resistant black paint.

[0053] As Figure 4 , 5As shown, the magnetic assembly 300 is slidingly arranged in the mounting groove 220 along the extension direction of the working sleeve 200 and has a magnetic portion 310 extending to the bottom of the inner clamping groove 210. The magnetic assembly 300 is provided with a limiting structure for limiting the sliding distance of the magnetic assembly 300 in the mounting groove 220.

[0054] Specifically, in the embodiment, the mounting groove 220 is cylindrical, and the side close to the inner clamping groove 210 is formed with a limiting clamping flange 240 by reducing the diameter. The middle part of the limiting clamping flange 240 is formed with a connecting hole 241 communicating the mounting groove 220 and the inner clamping groove 210.

[0055] Further, the magnetic assembly 300 is columnar, and the limiting structure is a limiting disc 320 arranged around the side of the magnetic assembly 300. The limiting disc 320 is in limiting cooperation with the inner side wall of the limiting clamping flange 240.

[0056] Therefore, the limiting disc 320 is slidingly extended and retracted in the axial direction of the mounting groove 220, driving the magnetic portion 310 to move in the direction close to or away from the mounting groove 220. The limiting disc 320 is in position limitation with the limiting clamping flange 240, and the wall magnetic portion 310 is out of the range of the mounting groove 220 and the inner clamping groove 210, so that the magnetic attraction connection between the wall magnetic portion 310 and the end of the expansion bolt 600 can be stably achieved.

[0057] As shown in Figure 4 , 5 , the center of the limiting disc 320 is provided with a fixing hole 321, and the outer periphery of the magnetic assembly 300 is provided with a threaded connection section 330. The fixing hole 321 is in threaded cooperation with the threaded connection section 330.

[0058] Therefore, through the threaded connection structure between the threaded connection section 330 and the fixing hole 321, the detachable connection between the limiting disc 320 and the magnetic assembly 300 can be easily achieved, and the convenience of production and installation and the maintainability of the subsequent can be improved.

[0059] As shown in Figure 6 , 7 , in order to achieve the convenient installation of the magnetic assembly 300 in the mounting groove 220, the limiting disc 320 is cut by two parallel chords with the same diameter to form limiting surfaces 322 on the two opposite sides thereof. The connecting hole 241 is symmetrically provided with limiting flanges 242 cooperating with the two limiting surfaces 322 to form a complete disc structure. The limiting clamping grooves 243 with shapes suitable for the limiting disc 320 are formed between the two limiting flanges 242.

[0060] Thus, when the magnetic assembly 300 is installed, first, the limiting disc 320 is screwed onto the magnetic assembly 300, then the limiting surfaces 322 on both sides of the limiting disc 320 are aligned with the limiting edges 242 on both sides of the connecting hole 241, after the shapes are aligned, the limiting disc 320 can be placed into the connecting hole 241 along the limiting slot 243 at this time to enter the installation slot 220, finally, by rotating the limiting disc 320, an angle (preferably 90°) is formed between the limiting surface 322 and the wall surface of the limiting edge 242, so that stable elastic limiting is formed by the contact between the upper end surface of the limiting surface 322 and the inner side wall of the limiting edge 242 and the auxiliary clamping of the elastic member 400, thereby avoiding the magnetic assembly 300 from coming out of the installation slot 220.

[0061] As shown in Figure 3 , 4 , the elastic member 400 is arranged between the magnetic assembly 300 and the installation slot 220, and is used for elastically contacting the magnetic assembly 300 to make the magnetic assembly 300 maintain the tendency of moving away from the bottom of the installation slot 220.

[0062] In the embodiment, the elastic member 400 is a spring, the spring is movably arranged in the first limiting slot 324 and is sleeved on the outer circumferential side of the magnetic assembly 300, and the other end of the spring movably contacts the bottom of the installation slot 220.

[0063] Thus, the spring generates an elastic force on the end surface of the limiting disc 320, which always moves towards the inner clamping slot 210, and by the elastic pre-pressing of the spring, it can be ensured that the magnetic assembly 300 always maintains the optimal contact distance, so that the expansion bolt 600 can be magnetically attracted at the first time when it is placed into the inner clamping slot 210, thereby stably maintaining the expansion bolt 600 in the inner clamping slot 210, and reducing the security risks of falling.

[0064] In addition, as shown in Figure 5 , 7 , the end surface of the limiting disc 320 extends perpendicularly around the circumferential side of the fixed hole 321 to form a limiting ring wall 323, and the inner side of the limiting ring wall 323 is enclosed to form the first limiting slot 324.

[0065] Thus, the first limiting slot 324 is formed by the limiting ring wall 323, the end of the spring is limited in the first limiting slot 324, the elastic force of the spring is concentrated on the limiting disc 320, and the stability of the magnetic assembly 300 in operation is improved.

[0066] Preferably, as shown in Figure 4 , the position close to the inner bottom of the installation slot 220 is formed with a coaxially distributed second limiting slot 250 by reducing the diameter, and an inclined annular guide surface 251 is arranged between the second limiting slot 250 and the inner side wall of the installation slot 220.

[0067] The inner diameter of the second limiting groove 250 in the embodiment is same as the first limiting groove 324, thereby forming a limiting structure for the other end of the spring at the inner bottom of the mounting groove 220, so that the elastic force of the spring always acts along the axial direction of the magnetic attraction assembly 300, wherein the annular guide surface 251 can facilitate the smooth introduction of the spring into the second limiting groove 250 without visual field when the spring is mounted.

[0068] Preferably, as shown in Figure 4 、 5 , the magnetic attraction part 310 is an annular magnet, and the middle part of the annular magnet is limited and clamped at the end of the magnetic attraction assembly 300 to form a magnetic attraction contact surface facing the inner clamping groove 210.

[0069] In the embodiment, the center position of the annular magnet forms a mounting clamping groove 311, and the inner diameter of the mounting clamping groove 311 is adapted to the outer diameter of the end of the magnetic attraction assembly 300, so that when the two are clamped, they abut against each other, and after the clamping of the annular magnet is completed, the end surface thereof is flush with the end surface of the magnetic attraction assembly 300, thereby forming the above-mentioned magnetic attraction contact surface, facilitating the automatic magnetic attraction to the end of the expansion bolt 600. Embodiment two

[0070] Please refer to Figure 8 , which is a general auxiliary tool for mounting the expansion bolt 600 as embodiment two of the utility model, and the difference from the first embodiment is that the first connecting structure 110 on the connecting rod 100 is in the shape of a circular shaft and has two groups of waist-shaped or strip-shaped positioning grooves 112, which are consistent with the connecting structure of the bit of the standard impact drill on the market, so that the connecting rod 100 can be conveniently connected into the bit connecting groove of the impact drill and used in cooperation with the impact drill.

[0071] The impact drill generally integrates the functions of an electric hammer and an electric drill, so that the expansion bolt 600 can be conveniently hammered into the hole position on the wall and conveniently tightened and fixed by connecting the auxiliary tool to the impact drill. Embodiment three

[0072] Please refer to Figure 9 、 10 , which is a general auxiliary tool for mounting the expansion bolt 600 as embodiment three of the utility model, and the difference from the first embodiment is that it further comprises a conversion piece 500, the conversion piece 500 comprises a connecting end 510 and a conversion end 520 connected coaxially and integrally, the end of the connecting end 510 is provided with a second connecting structure 511, and the conversion end 520 is provided with a quick connecting structure 521, the quick connecting structure 521 is used for quick disassembly and connection of the first connecting structure 110 to form the coaxial connection of the conversion piece 500 and the connecting rod 100, and the second connecting structure 511 is used for connecting and cooperating with the bit connecting groove of the impact drill or the hand electric drill 700 different from the first connecting structure 110.

[0073] In this embodiment, the quick connection structure 521 is a commonly used 1 / 4 quick connector, which has a connecting groove (not shown in the figure) on the inner side, and the connecting groove is adapted to the first connecting structure 110 of the drill bit of the electric drill 700, and the second connecting structure 511 is the same as the connecting structure of the impact drill bit, so that the same auxiliary tool can be switched between the electric drill 700 and the impact drill through the adapter 500, and the tool is adapted according to the site, and the convenience of the auxiliary tool is fully improved.

[0074] Figure 13 and Figure 14 The utility model discloses a practical reference drawing.

[0075] The working process and beneficial effects of the utility model are as follows:

[0076] As Figure 10 , 11 The connecting rod 100 of the auxiliary tool is first inserted into the drill bit connecting groove of the electric drill 700, and the fixed connection of the auxiliary tool is completed, then the nut end of the expansion bolt 600 is placed in the inner clamping groove 210 in the working sleeve 200 of the auxiliary tool, at this time, the magnetic attraction part 310 automatically attracts the end of the expansion bolt 600, and the expansion bolt 600 is stably arranged in the inner clamping groove 210.

[0077] Then, in the installation process, the expansion bolt 600 is clamped into the corresponding hole position on the wall through the electric drill 700, finally the electric drill 700 is started, the rotation of the auxiliary tool drives the nut of the expansion bolt 600 to rotate synchronously, finally the expansion bolt 600 is expanded in the hole position, the fixing is completed, and in the expansion process, the rod-shaped structure of the expansion bolt 600 continuously pushes out, and the magnetic attraction part 310 is pressed into the mounting groove 220, and the installation process of the expansion bolt 600 is realized in cooperation.

[0078] The utility model realizes the quick adaptation with the impact drill / electric drill 700 through the standardized connecting rod 100, integrates the drilling, knocking and tightening procedures in the expansion bolt 600 installation process to a single tool, eliminates the cumbersome process of tool switching in the traditional installation, and fully improves the installation efficiency of the expansion bolt 600.

[0079] In addition, through the cooperation of the magnetic attraction assembly 300 and the elastic member 400, temporary adsorption force can be generated on the end of the expansion bolt 600 in the installation process, so that the end of the expansion bolt 600 is fixed in the inner clamping groove 210 and kept in a stable posture, the expansion bolt 600 is prevented from falling off from the inner clamping groove 210 in the case of single-handed operation, and the stability and safety of the expansion bolt 600 installation are fully improved.

[0080] The utility model has been described exemplarily above in combination with the drawings, obviously, the utility model specific implementation is not limited by the above-mentioned mode, as long as various non-essential improvements of method concept and technical scheme of adopting the utility model or the utility model concept and technical scheme are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A universal auxiliary tool for installing expansion bolts (600), characterized in that, include: The connecting rod (100) has a first connecting structure (110) at one end for connecting and engaging with the bit slot of an impact drill or electric drill (700); The working sleeve (200) is connected to the connecting rod (100) at one end, and the end face of the other end forms an inner groove (210) that is limited to the nut (610) of the expansion bolt (600). The inner bottom of the inner groove (210) is provided with an installation groove (220) along the extension direction of the working sleeve (200). The magnetic suction assembly (300) is slidably disposed in the mounting groove (220) along the extension direction of the working sleeve (200) and has a magnetic suction part (310) extending to the bottom of the inner slot (210). The magnetic suction assembly (300) is provided with a limiting structure for limiting its sliding distance in the mounting groove (220). An elastic element (400) is provided between the magnetic absorbing assembly (300) and the mounting groove (220) for elastically contacting the magnetic absorbing assembly (300) so that its magnetic part (310) tends to stay away from the bottom of the mounting groove (220).

2. The universal auxiliary tool for installing expansion bolts (600) according to claim 1, characterized in that, The mounting groove (220) is cylindrical, and a limiting edge (240) is formed on the side near the inner slot (210) by reducing its diameter. A connecting hole (241) is formed in the middle of the limiting edge (240) to connect the mounting groove (220) and the inner slot (210).

3. A universal auxiliary tool for installing expansion bolts (600) according to claim 2, characterized in that, The magnetic suction component (300) is columnar, and the limiting structure is a limiting disk (320) arranged around the periphery of the magnetic suction component (300). The limiting disk (320) is limited and engaged with the inner wall of the limiting edge (240).

4. A universal auxiliary tool for installing expansion bolts (600) according to claim 3, characterized in that, The center of the limiting plate (320) is provided with a fixing hole (321), and the outer periphery of the magnetic suction component (300) is provided with a threaded connection section (330). The fixing hole (321) and the threaded connection section (330) are threadedly engaged.

5. A universal auxiliary tool for installing expansion bolts (600) according to claim 3, characterized in that, The limiting disk (320) is cut by two chords parallel to its diameter to form limiting surfaces (322) on its two opposite sides. The connecting hole (241) is symmetrically provided with limiting edges (242) that cooperate with the two limiting surfaces (322) to form a complete disk structure. A limiting groove (243) that is adapted to the shape of the limiting disk (320) is formed between the two limiting edges (242).

6. A universal auxiliary tool for installing expansion bolts (600) according to claim 4, characterized in that, The end face of the limiting plate (320) extends vertically around the fixing hole (321) to form a limiting ring wall (323), and the inner side of the limiting ring wall (323) forms a first limiting groove (324).

7. A universal auxiliary tool for installing expansion bolts (600) according to claim 6, characterized in that, The elastic element (400) is a spring, which is movably disposed in the first limiting groove (324) and sleeved on the outer periphery of the magnetic suction assembly (300). The other end of the spring movably contacts the bottom of the mounting groove (220).

8. A universal auxiliary tool for installing expansion bolts (600) according to claim 7, characterized in that, The mounting groove (220) near the inner bottom is formed by a reduction in diameter to form a second limiting groove (250) coaxially distributed. An inclined annular guide surface (251) is provided between the second limiting groove (250) and the inner wall of the mounting groove (220).

9. A universal auxiliary tool for installing expansion bolts (600) according to claim 1, characterized in that, The magnetic attraction part (310) is a ring magnet, and the middle part of the ring magnet is locked to the end of the magnetic attraction assembly (300) to form a magnetic attraction contact surface facing the inner slot (210).

10. A universal auxiliary tool for installing expansion bolts (600) according to claim 1, characterized in that, It also includes a conversion component (500), which includes a coaxially integrated connecting end (510) and an adapter end (520). The end of the connecting end (510) is provided with a second connecting structure (511), and the adapter end (520) is provided with a quick-connect structure (521). The quick-connect structure (521) is used to quickly connect the first connecting structure (110) to form a coaxial connection between the conversion component (500) and the connecting rod (100). The second connecting structure (511) is used to connect and cooperate with the bit slot of an impact drill or electric drill (700) that is different from the first connecting structure (110).

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