Fastening device of expansion screw

Abstract

The utility model discloses a fastening device of an expansion screw, which relates to the technical field of expansion screws and comprises a holding rod, one end of the holding rod is fixedly connected with an outer ring, the side wall of the inner ring of the outer ring is rotatably connected with an inner ring, the side wall of the inner ring is provided with a hexagonal hole, and an extrusion structure is arranged in the hexagonal hole. A limiting ring is fixedly connected to the side wall of the outer circle of the inner ring, an annular groove is formed in the side wall of the inner circle of the outer ring, the limiting ring is rotationally connected into the annular groove, a plurality of first limiting blocks are fixedly connected to the side wall of the outer circle of the limiting ring, and the side wall of one end of each first limiting block is obliquely arranged; by driving the holding rod to rotate anticlockwise and clockwise, the holding rod cannot drive the inner ring to rotate when rotating clockwise, and can drive the inner ring to tighten a nut when rotating anticlockwise, so that expansion screws on walls at high positions can be tightened without climbing to the high positions, the tightening efficiency of the nut is improved, and the labor intensity of workers is reduced. And the installation efficiency of the expansion screw is further improved.

Description

Technical Field

[0001] This utility model relates to the field of expansion screw technology, and in particular to a fastening device for expansion screws. Background Technology

[0002] In the field of building construction, expansion bolts need to be installed on floor slabs or walls. The conventional method is to use scaffolding or A-frame ladders to climb up and tighten them with wrenches. Each time a bolt is tightened, the scaffolding or A-frame ladder needs to be moved, which is not only time-consuming and laborious, but also prone to high-altitude dangers, causing certain difficulties for construction.

[0003] For example, Chinese Patent Publication No. CN206216563U discloses an installation and fastening device for a lead screw expansion bolt, comprising a handle, a connecting rod, and an expansion bolt sleeve. The handle is arranged horizontally, and the bottom end of the connecting rod is welded to the handle and perpendicular to the handle. The shape of the bottom end face of the connecting rod matches the shape of the part of the handle where it is welded to the connecting rod. The axis of the connecting rod coincides with the perpendicular bisector of the handle. The top end of the connecting rod is butt-welded to the expansion bolt sleeve, and the expansion bolt sleeve is coaxial with the connecting rod.

[0004] However, in the above solution, when tightening the expansion bolt nut, the device tightens the nut through the sleeve set at the top of the connecting rod. This tightening method can only tighten the expansion bolts on the top wall. When it is necessary to tighten the expansion bolts on the wall at a higher position, the device needs to be on the same horizontal line as the expansion bolt to tighten it, which requires the staff to climb to the higher position, which is quite inconvenient. Utility Model Content

[0005] This invention provides a fastening device for expansion screws to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fastening device for expansion screws includes a handle, one end of which is fixedly connected to an outer ring. An inner ring is rotatably connected to the inner sidewall of the outer ring. The inner ring has a hexagonal hole with a compression structure inside. A limiting ring is fixedly connected to the outer sidewall of the inner ring. A groove is formed in the inner sidewall of the outer ring, and the limiting ring is rotatably connected within the groove. A plurality of first limiting blocks are fixedly connected to the outer sidewall of the limiting ring. One sidewall of each of the first limiting blocks is inclined. A plurality of receiving slots are formed in the outer sidewall of the groove. A second spring is fixedly connected to each receiving slot. One end of each second spring is fixedly connected to a first limiting block. Each first limiting block is slidably connected to each receiving slot. One sidewall of each first limiting block is inclined, and the inclined sidewall of each first limiting block is opposite to the inclined sidewall of each second limiting block.

[0008] As a further improvement to this technical solution: the extrusion structure includes six sliding grooves, which are respectively opened on the six side walls of the hexagonal hole. Two first springs are fixedly connected in each of the six sliding grooves. One end of each of the two first springs on the side wall of the six sliding grooves is fixedly connected to an extrusion block. Each extrusion block is slidably connected to each sliding groove, and one end of each extrusion block is arc-shaped.

[0009] As a further improvement to this technical solution: each of the first springs and each of the second springs is made of stainless steel.

[0010] As a further improvement to this technical solution: a hammer is fixedly connected to the side wall of the grip, and the hammer is used to strike the expansion screw.

[0011] As a further improvement to this technical solution: a handle is provided on the outer side wall of one end of the grip bar, and the handle is made of non-slip material.

[0012] As a further improvement to this technical solution: a hanging ring is fixedly connected to one end of the grip.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: After the nut of the expansion screw is inserted into the hexagonal hole, the expansion screw can be inserted into the hole in the wall by holding the handle. The expansion screw can be tapped with a hammer to make it fully enter the hole in the wall, so that the hexagonal hole can be fitted onto the outer ring of the nut. Then, the handle is rotated counterclockwise, which drives the outer ring to rotate counterclockwise. The outer ring simultaneously drives multiple first limiting blocks to rotate. The side walls of the multiple first limiting blocks and multiple second limiting blocks press against each other, causing the multiple second limiting blocks to drive the inner ring to rotate through the limiting ring, thereby driving the nut to rotate clockwise. The lever can be rotated clockwise to tighten the nuts when it reaches a certain position. This causes multiple first limiting blocks to rotate, which in turn press against the inclined sidewalls of the second limiting blocks. This causes the first limiting blocks to move along the inclined sidewalls of the second limiting blocks and simultaneously move into the storage slots. This prevents the lever from driving the inner ring to rotate clockwise, but allows it to tighten the nuts counterclockwise. This eliminates the need to climb to high places to tighten expansion bolts on walls, improving the tightening efficiency of the nuts and thus increasing the installation efficiency of the expansion bolts.

[0014] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 This is a front view schematic diagram of the fastening device for expansion screws proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the outer ring structure in a fastening device for an expansion screw proposed in this utility model;

[0018] Figure 3 This is a schematic cross-sectional view of the outer ring in a fastening device for an expansion screw proposed in this utility model.

[0019] Figure 4 This is a schematic diagram of the disassembled structure of the outer ring in the fastening device for an expansion screw proposed in this utility model.

[0020] Figure 5This is a schematic cross-sectional view of the inner ring in a fastening device for an expansion screw proposed in this utility model.

[0021] Figure 6 for Figure 3 A magnified structural diagram of A in the diagram.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Grip; 2. Striking hammer; 3. Handle; 4. Hanging ring; 5. Outer ring; 6. Inner ring; 7. Pressing block; 8. Hexagonal hole; 9. Limiting ring; 10. First limiting block; 11. Ring groove; 12. Second limiting block; 13. Sliding groove; 14. First spring; 15. Storage groove; 16. Second spring. Detailed Implementation

[0024] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described in more detail below by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0025] For examples, please refer to Figure 1-6 This utility model provides a technical solution: a fastening device for expansion screws, including a handle 1, an outer ring 5 fixedly connected to one end of the handle 1, an inner ring 6 rotatably connected to the inner side wall of the outer ring 5, a hexagonal hole 8 formed in the side wall of the inner ring 6, a compression structure provided in the hexagonal hole 8, a limiting ring 9 fixedly connected to the outer side wall of the inner ring 6, an annular groove 11 formed in the inner side wall of the outer ring 5, the limiting ring 9 rotatably connected in the annular groove 11, and a plurality of first limiting blocks 10 fixedly connected to the outer side wall of the limiting ring 9. The first limiting block 10 has one side wall that is inclined. The outer side wall of the annular groove 11 has multiple storage slots 15. Each storage slot 15 is fixedly connected to a second spring 16. One end of each second spring 16 is fixedly connected to a first limiting block 10. Each first limiting block 10 is slidably connected to each storage slot 15. One side wall of each first limiting block 10 is inclined. The inclined side wall of each first limiting block 10 is opposite to the inclined side wall of each second limiting block 12.

[0026] Specifically, after inserting the expansion screw nut into the hexagonal hole 8, the expansion screw can be inserted into the hole in the wall by holding the handle 1. The expansion screw can be tapped with the hammer 2 to ensure it is fully inserted into the hole. Then, the hexagonal hole 8 can be fitted onto the outer ring of the nut. Next, the handle 1 is rotated counterclockwise. The handle 1 causes the outer ring 5 to rotate counterclockwise, which in turn causes multiple first limiting blocks 10 to rotate. The sidewalls of the multiple first limiting blocks 10 and multiple second limiting blocks 12 press against each other, causing the second limiting blocks 12 to drive the inner ring 6 to rotate through the limiting ring 9, thereby causing the nut to rotate clockwise and tighten. The handle 1 is then rotated... When the movement reaches a certain point, the handle 1 can be rotated clockwise. The handle 1 drives multiple first limiting blocks 10 to rotate. At this time, the inclined sidewalls of the multiple first limiting blocks 10 and the multiple second limiting blocks 12 press against each other, causing the multiple first limiting blocks 10 to move along the inclined sidewalls of the second limiting blocks 12. The multiple first limiting blocks 10 move into the multiple storage slots 15 at the same time, so that the handle 1 cannot drive the inner ring 6 to rotate when rotating clockwise, but can drive the inner ring 6 to tighten the nut when rotating counterclockwise. Therefore, the expansion screws on the high wall can be tightened without climbing to a high place, which improves the tightening efficiency of the nut and thus improves the installation efficiency of the expansion screws.

[0027] Please see Figure 1-5 The extrusion structure includes six sliding grooves 13, which are respectively opened on the six side walls of the hexagonal hole 8. Two first springs 14 are fixedly connected in each of the six sliding grooves 13. One end of each of the two first springs 14 on the side wall of the six sliding grooves 13 is fixedly connected to an extrusion block 7. Each extrusion block 7 is slidably connected to each sliding groove 13, and one end of each extrusion block 7 is arc-shaped.

[0028] Please see Figure 3 , Figure 5-6 Each first spring 14 and each second spring 16 are made of stainless steel.

[0029] Specifically, when using this device, the nut of the expansion screw can be inserted into the hexagonal hole 8. The nut simultaneously compresses multiple compression blocks 7 and slides them into the sliding groove 13. The multiple compression blocks 7 can simultaneously compress multiple first springs 14. Under the action of the multiple first springs 14, the multiple compression blocks 7 can press against the side wall of the nut, thereby increasing the compressive force on the nut and improving the stability of the nut being inserted into the hexagonal hole 8.

[0030] Please see Figure 1 A hammer 2 is fixedly connected to the side wall of the handle 1. The hammer 2 is used to strike the expansion screw.

[0031] Please see Figure 1 The outer ring side wall of one end of the grip bar 1 is provided with a handle 3, which is made of non-slip material.

[0032] Please see Figure 1 One end of the handle 1 is fixedly connected to a hanging ring 4, which makes it easy to hang the device on the wall for convenient placement.

[0033] The working principle of this utility model is as follows: When using this device, the nut of the expansion screw can be stuck in the hexagonal hole 8. The nut simultaneously squeezes multiple extrusion blocks 7 to slide into the sliding groove 13. The multiple extrusion blocks 7 can simultaneously squeeze multiple first springs 14. Under the action of the multiple first springs 14, the multiple extrusion blocks 7 can be pressed against the side wall of the nut, thereby increasing the extrusion force on the nut and improving the stability of the nut stuck in the hexagonal hole 8.

[0034] After inserting the expansion screw nut into the hexagonal hole 8, the expansion screw can be inserted into the hole in the wall by holding the handle 1. The expansion screw can be tapped with the hammer 2 to ensure it is fully inserted into the hole. Then, the hexagonal hole 8 can be fitted onto the outer ring of the nut. Next, rotate the handle 1 counterclockwise. The handle 1 drives the outer ring 5 to rotate counterclockwise, which in turn drives multiple first limiting blocks 10 to rotate. The side walls of the multiple first limiting blocks 10 and multiple second limiting blocks 12 press against each other, causing the second limiting blocks 12 to drive the inner ring 6 to rotate through the limiting ring 9, thereby causing the nut to rotate clockwise and tighten. When the handle 1 rotates to… When a certain degree is reached, the handle 1 can be rotated clockwise. The handle 1 drives multiple first limiting blocks 10 to rotate. At this time, the inclined sidewalls of multiple first limiting blocks 10 and multiple second limiting blocks 12 press against each other, causing multiple first limiting blocks 10 to move along the inclined sidewalls of the second limiting blocks 12. Multiple first limiting blocks 10 move into multiple storage slots 15 at the same time, so that the handle 1 cannot drive the inner ring 6 to rotate when rotating clockwise, but can drive the inner ring 6 to tighten the nut when rotating counterclockwise. Thus, the expansion screws on the high wall can be tightened without climbing to a high place, improving the tightening efficiency of the nut and thus improving the installation efficiency of the expansion screws.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A fastening device for expansion screws comprising a handle (1), characterized in that One end of the grip (1) is fixedly connected to an outer ring (5), and an inner ring (6) is rotatably connected to the inner side wall of the outer ring (5). A hexagonal hole (8) is provided on the side wall of the inner ring (6), and a compression structure is provided in the hexagonal hole (8). A limiting ring (9) is fixedly connected to the outer side wall of the inner ring (6), and an annular groove (11) is provided on the inner side wall of the outer ring (5). The limiting ring (9) is rotatably connected in the annular groove (11), and a plurality of first limiting blocks (10) are fixedly connected to the outer side wall of the limiting ring (9). One end of the plurality of first limiting blocks (10) is fixedly connected to the outer side wall of the limiting ring (9). The sidewalls are all inclined. The outer sidewall of the annular groove (11) is provided with multiple storage slots (15). Each storage slot (15) is fixedly connected with a second spring (16). Each second spring (16) is fixedly connected with a first limiting block (10) at one end. Each first limiting block (10) is slidably connected to each storage slot (15). One sidewall of each first limiting block (10) is inclined. The inclined sidewall of each first limiting block (10) is opposite to the inclined sidewall of each second limiting block (12).

2. A fastening device for an expansion screw according to claim 1, characterized in that The extrusion structure includes six sliding grooves (13), which are respectively opened on the six side walls of the hexagonal hole (8). Two first springs (14) are fixedly connected in each of the six sliding grooves (13). One end of each of the two first springs (14) on the side wall of the six sliding grooves (13) is fixedly connected to an extrusion block (7). Each extrusion block (7) is slidably connected to each sliding groove (13), and one end of each extrusion block (7) is arc-shaped.

3. A fastening device for an expansion screw according to claim 2, wherein Each of the first springs (14) and each of the second springs (16) is made of stainless steel.

4. A fastening device for an expansion screw according to claim 1, wherein A hammer (2) is fixedly connected to the side wall of the grip (1), and the hammer (2) is used to strike the expansion screw.

5. The fastening device for an expansion screw according to claim 1, characterized in that, The grip (1) has a handle (3) on the outer side wall of one end, and the handle (3) is made of non-slip material.

6. The fastening device for an expansion screw according to claim 1, characterized in that, A hanging ring (4) is fixedly connected to one end of the grip (1).

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