Easily-pulled expansion screw

Abstract

The utility model relates to the technical field of expansion screws, and discloses an easy-to-pull expansion screw which comprises a screw rod, a first external thread is arranged outside one end of the screw rod, an expansion outer sleeve is connected outside the first external thread in a threaded mode, an internal thread matched with the first external thread is arranged inside the expansion outer sleeve, and a spring pad is fixedly connected outside one end of the expansion outer sleeve. Compared with the prior art, the easy-to-pull expansion screw has the advantage that the fixing effect and the stability of the easy-to-pull expansion screw are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion screws, in particular to an easy-to-pull expansion screw. Background Art

[0002] An expansion screw is a metal fastener consisting of a screw and an expansion tube. By rotating or tightening the nut, the conical part of the screw expands outward, thereby expanding the expansion tube and tightly fixing it to the wall. This screw has a strong load-bearing capacity and a stable fixing effect. It is suitable for fastening materials such as cement and bricks, and is often used in the installation of equipment such as guardrails, awnings, and air conditioners. Existing easy-to-pull expansion screws have problems with poor fixing effect and poor stability during use. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and provides an easy-to-pull expansion screw.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an easy-to-pull expansion screw, including a screw rod, an external thread 1 is provided on the outside of one end of the screw rod, the external thread 1 is connected to an expansion sleeve, the expansion sleeve is provided with an internal thread matching the external thread 1, a spring pad is fixedly connected to the outside of one end of the expansion sleeve, a flat pad is fixedly connected to one end of the spring pad, and anti-slip particles are fixedly connected to the outer wall of the expansion sleeve.

[0005] As a further description of the above technical solution:

[0006] The screw rod is provided with external thread 2 on the outside of one end away from external thread 1, and external thread 1 and nut 2 are connected with each other through external thread of external thread 2, and nut 2 is located above nut 1.

[0007] As a further description of the above technical solution:

[0008] One end of the screw rod is fixedly connected with a driving part, and a square hole is provided inside the driving part.

[0009] As a further description of the above technical solution:

[0010] The spring pads and flat pads are provided in multiple groups, and the material of the spring pads is rubber.

[0011] As a further description of the above technical solution:

[0012] The anti-skid particles are provided in multiple groups, and the material of the anti-skid particles is polyurethane.

[0013] As a further description of the above technical solution:

[0014] The nut 1 and the nut 2 are in parallel directions.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the utility model, the fixing effect of the easy-to-pull expansion screw is improved through the close contact between the expansion jacket and the wall, and the combined effect of the spring pad and the flat pad, and anti-slip particles are arranged on the outside of the expansion jacket to further increase the friction between the expansion jacket and the wall, thereby improving the stability of the easy-to-pull expansion screw.

[0017] 2. In the utility model, by rotating the nut 2, the nut 1 can be locked to prevent the nut 1 from loosening, thereby further improving the fixing force of the easy-to-pull expansion screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structure of an easy-to-pull expansion screw proposed by the utility model is shown in FIG. Figure 1 ;

[0019] Figure 2 The overall structure of an easy-to-pull expansion screw proposed by the utility model is shown in FIG. Figure 2 .

[0020] Legend:

[0021] 1. Screw; 2. External thread 1; 3. Expansion sleeve; 4. Internal thread; 5. Spring washer; 6. Flat washer; 7. External thread 2; 8. Nut 1; 9. Nut 2; 10. Driving unit; 11. Square hole; 12. Anti-slip particles. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 1-Figure 2 The utility model provides an embodiment: an easy-to-pull expansion screw, including a screw rod 1, an external thread 2 is provided on the outside of one end of the screw rod 1, an expansion sleeve 3 is threadedly connected to the external thread of the external thread 2, an internal thread 4 matching the external thread 2 is provided inside the expansion sleeve 3, a spring pad 5 is fixedly connected to the outside of one end of the expansion sleeve 3, a flat pad 6 is fixedly connected to one end of the spring pad 5, and anti-slip particles 12 are fixedly connected to the outer wall of the expansion sleeve 3.

[0024] An external thread 2 7 is provided on the outside of one end of the screw 1 away from the external thread 1 2, and a nut 1 8 and a nut 2 9 are connected to the external thread of the external thread 2 7. The nut 2 9 is located above the nut 1 8 to improve stability. A driving part 10 is fixedly connected to one end of the screw 1, and a square hole 11 is opened inside the driving part 10 to facilitate the use of tools such as screwdrivers and wrenches for rotation operations. There are multiple groups of spring pads 5 and flat pads 6. The spring pads 5 are made of rubber material, which can protect the surface of an object from being crushed. There are multiple groups of anti-slip particles 12. The material of the anti-slip particles 12 is polyurethane, which can be used for a long time without deformation. The nut 1 8 and the nut 2 9 are in parallel directions.

[0025] Working principle: Place the screw rod 1 at the position to be fixed, use a screwdriver, wrench or other tools to rotate the driving part 10, so that the screw rod 1 rotates inside the expansion sleeve 3. As the screw rod 1 rotates, the expansion sleeve 3 gradually expands outward to form a close contact with the wall. Turn the nut 2 9 to make the nut 2 9 contact with the nut 1 8, lock the nut 1 8 to prevent it from loosening, and a stable fixing effect can be achieved.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An easy-to-pull expansion screw, comprising a screw rod (1), characterized in that: An external thread (2) is provided on the outside of one end of the screw rod (1), and the external thread (2) is connected to an expansion sleeve (3) through an external thread, and an internal thread (4) matching the external thread (2) is provided inside the expansion sleeve (3), and a spring pad (5) is fixedly connected to the outside of one end of the expansion sleeve (3), and a flat pad (6) is fixedly connected to one end of the spring pad (5), and anti-skid particles (12) are fixedly connected to the outer wall of the expansion sleeve (3).

2. The easy-to-pull expansion screw according to claim 1, characterized in that: The screw rod (1) is provided with an external thread (2) at one end thereof away from the external thread (2), and the external thread (7) is connected to a nut (8) and a nut (9) by external threads, and the nut (9) is located above the nut (8).

3. The easy-to-pull expansion screw according to claim 1, characterized in that: One end of the screw rod (1) is fixedly connected to a driving part (10), and a square hole (11) is provided inside the driving part (10).

4. The easy-to-pull expansion screw according to claim 1, characterized in that: The spring pads (5) and the flat pads (6) are provided in multiple groups, and the material of the spring pads (5) is rubber.

5. The easy-to-pull expansion screw according to claim 1, characterized in that: The anti-skid particles (12) are provided in a plurality of groups, and the material of the anti-skid particles (12) is polyurethane.

6. The easy-to-pull expansion screw according to claim 2, characterized in that: The nut one (8) and the nut two (9) are in parallel directions.

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