Novel top type expansion bolt

Abstract

The utility model discloses a novel top type expansion bolt which comprises an elliptical wheel (1), a clamp spring (2), a screw rod (3), a flat gasket (4), a nut (5) and a spring cushion (6), the flat gasket (4) is sleeved on the screw rod (3), and the spring cushion (6) is screwed into the nut (5). The elliptical wheels (1) are respectively placed in grooves arranged on the screw (3), the clamp springs (2) are clamped at the lower ends outside the elliptical wheels (1), and the upper ends of the elliptical wheels (1) protrude out of the screw (3). The expansion bolt is frequently vibrated, shaken and pulled, the larger the pulling force is, the tighter the expansion bolt is, the expansion bolt does not shake and is stable, and stress in a bolt hole is even.

Description

Technical Field

[0001] This utility model belongs to the field of bolt technology, specifically relating to a novel top-type expansion bolt. Background Technology

[0002] Expansion bolts are special threaded fasteners used to fix pipe supports, hangers, brackets, or equipment to walls, floors, or columns. However, existing expansion bolts often experience uneven stress within the bolt holes due to frequent vibration, shaking, and pulling when the equipment is fixed to walls, floors, or columns. Even with reverse threads, the expansion bolts may not completely detach after loosening, causing the equipment to shake and become unstable. Summary of the Invention

[0003] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a new type of top-type expansion bolt that is provided when the equipment is frequently vibrating, shaking and pulling, the expansion bolt becomes tighter with greater tension, does not shake, is stable, and has uniform force in the bolt hole.

[0004] The purpose of this utility model and the solution to its main technical problem are achieved by the following technical solution:

[0005] This utility model discloses a novel top-type expansion bolt, comprising an elliptical wheel, a retaining ring, a screw rod, a flat washer, a nut, and a spring washer. The flat washer and spring washer are fitted onto the screw rod and screwed into the nut. Elliptical wheels are placed in grooves on the screw rod, and retaining rings are attached to the lower ends of the elliptical wheels. The upper ends of the elliptical wheels protrude from the screw rod.

[0006] The elliptical wheel has several teeth.

[0007] The retaining ring is elastic and has an opening that can be opened.

[0008] The upper end of the screw (3) is square.

[0009] Compared with the prior art, this utility model has significant advantages. As can be seen from the above technical solution: Elliptical wheels are placed in grooves on the screw, and snap rings are attached to the lower ends of the elliptical wheels. The upper ends of the elliptical wheels protrude from the screw. When the screw is inserted into the hole, the snap rings contract due to their elasticity, causing the teeth on the elliptical wheels to contact the inner wall of the hole. Moving the nut pulls the screw, which in turn pulls the equidistantly arranged elliptical wheels. The teeth on the elliptical wheels bite into the inner wall of the hole, achieving uniform force distribution within the bolt hole. Continuing to move the nut... The screw pulls the elliptical wheel, causing the wheel to protrude further from the screw. The teeth on the elliptical wheel grip the inner wall of the hole more tightly. The greater the screw's pulling force, the more the elliptical wheel protrudes from the screw, and the tighter the teeth grip the inner wall of the hole, resulting in a tighter expansion bolt. This ensures that even with frequent vibration, shaking, and pulling of the expansion bolt, the greater the pulling force, the tighter the expansion bolt remains, preventing shaking and ensuring stability. In short, this utility model's device ensures that even with frequent vibration, shaking, and pulling of the expansion bolt, the greater the pulling force, the tighter the expansion bolt remains, preventing shaking and ensuring stability, with uniform force distribution within the bolt hole. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is the front view of this utility model;

[0012] Figure 3 yes Figure 2 Enlarged view of point a in the middle;

[0013] Figure 4 yes Figure 2 Sectional view of AA;

[0014] Figure 5 yes Figure 4 Enlarged view of point b in the middle;

[0015] Figure 6 This is a schematic diagram of the elliptical wheel and snap ring of this utility model;

[0016] Figure 7 This is a schematic diagram of the structure of the elliptical wheel of this utility model;

[0017] Figure 8 This is a structural schematic diagram of the screw, flat washer, nut, and spring washer of this utility model;

[0018] Figure 9 This is a diagram showing the usage state of this utility model;

[0019] Figure 10 yes Figure 9 A magnified view of point c in the middle.

[0020] Markings in the figure

[0021] 1. Elliptical wheel, 2. Snap ring, 3. Screw, 4. Flat washer, 5. Nut, 6. Spring washer, 7. Hole. Detailed Implementation

[0022] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation methods, structure, features, and effects of this utility model.

[0023] This utility model discloses a novel top-type expansion bolt, comprising an elliptical wheel 1, a retaining spring 2, a screw 3, a flat washer 4, a nut 5, and a spring washer 6. The flat washer 4 and the spring washer 6 are fitted onto the screw 3 and screwed into the nut 5. Elliptical wheels 1 are placed in grooves on the screw 3, and retaining springs 2 are attached to the lower ends of several elliptical wheels 1. The upper ends of the elliptical wheels 1 protrude from the screw 3, and the elliptical wheels 1 are provided with several teeth. The retaining springs 2 are elastic and have openings that can be opened. The upper end of the screw 3 is square.

[0024] When using, please refer to Figure 9-10 Insert the screw 3 into the hole. The retaining spring 2 contracts due to its elasticity, causing the teeth on the elliptical wheel 1 to contact the inner wall of the hole 7. Use a wrench to hold the square head at the top of the screw 3 to prevent it from rotating. Move the nut 5, which pulls the screw 3. The screw 3 pulls the elliptical wheels 1, which are arranged at equal intervals. The teeth on the elliptical wheels 1 bite into the inner wall of the hole 7, achieving uniform force distribution within the bolt hole. Continue moving the nut 3, which pulls the elliptical wheels 1, making them protrude further from the screw 3. The teeth on the elliptical wheels 1 bite into the inner wall of the hole 7 more tightly. The greater the pulling force of the screw 3, the more the elliptical wheels 1 protrude from the screw 3, and the tighter the teeth on the elliptical wheels 1 bite into the inner wall of the hole 7. This ensures that even when the equipment is frequently vibrated, shaken, or pulled, the expansion bolt remains tight and stable.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A novel top-mounted expansion bolt, comprising an elliptical wheel (1), a retaining ring (2), a screw (3), a flat washer (4), a nut (5), and a spring washer (6), wherein the flat washer (4) and the spring washer (6) are fitted onto the screw (3) and screwed into the nut (5), characterized in that; Elliptical wheels (1) are placed in the grooves set on the screw (3), and snap rings (2) are attached to the lower ends of the outer surfaces of several elliptical wheels (1). The upper ends of the elliptical wheels (1) protrude from the screw (3).

2. The novel top-type expansion bolt as described in claim 1, characterized in that; The elliptical wheel (1) has several teeth.

3. The expansion bolt as described in claim 1, characterized in that; The retaining ring (2) is elastic and has an opening that can be opened.

4. The expansion bolt as described in claim 1, characterized in that; The upper end of the screw (3) is square.

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