Novel top type expansion bolt

Abstract

The invention discloses a top type novel expansion bolt which comprises an elliptical wheel (1), a clamp spring (2), a screw rod (3), a flat gasket (4), a screw cap (5) and a spring cushion (6), the screw rod (3) is sleeved with the flat gasket (4), and the spring cushion (6) is screwed into the screw cap (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 equipment often vibrates, shakes and pulls the expansion bolt, 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 uniform.

Description

Technical Field

[0001] The invention belongs to the technical field of bolts, and in particular relates to a new top-type expansion bolt. Background Art

[0002] Expansion bolts are special threaded connectors used to fix pipe supports, hangers, brackets or equipment on walls, floors or columns. Expansion bolts in the prior art are often subject to vibration, shaking and pulling when the equipment is fixed on walls, floors or columns, and the force in the bolt holes is uneven. Although there is a reverse thread, the expansion bolts do not fall off after loosening, but the loose expansion bolts will cause the equipment to shake and become unstable. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned disadvantages and provide a new top-type expansion bolt that can withstand frequent vibration, shaking and pulling of expansion bolts. The greater the pulling force, the tighter the expansion bolt will be. The bolt will not shake, is stable, and has uniform force in the bolt hole.

[0004] The purpose of the present invention and the solution of its main technical problems are achieved by adopting the following technical solutions: The invention 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 the spring washer are sleeved on the screw rod and screwed into the nut. The elliptical wheels are respectively placed in the grooves arranged on the screw rod. The retaining rings are clamped on the lower ends of the outer surfaces of several elliptical wheels, and the screw rods protrude from the upper ends of the elliptical wheels.

[0005] The elliptical wheel is provided with a plurality of teeth.

[0006] The clamping spring is elastic and is provided with an opening that can be opened.

[0007] The upper end of the screw (3) is square.

[0008] Compared with the prior art, the present invention has obvious beneficial effects. It can be seen from the above technical scheme that: the elliptical wheels are respectively placed in the grooves arranged on the screw rod, the lower ends of the outer surfaces of the plurality of elliptical wheels are clamped with retaining springs, the upper ends of the elliptical wheels protrude the screw rod, the screw rod is inserted into the hole, the retaining spring contracts through elastic force to make the teeth arranged on the elliptical wheel contact with the inner wall of the hole, the nut is moved, the nut pulls the screw rod, the screw rod pulls the equidistantly arranged elliptical wheels, the teeth arranged on the plurality of elliptical wheels bite the inner wall of the hole respectively, the force in the bolt hole is evenly distributed, and the nut is continuously moved. The screw pulls the elliptical wheel to make the elliptical wheel protrude more from the screw, and the teeth arranged on the elliptical wheel bite the inner wall of the hole more tightly. The greater the pulling force of the screw, the more the elliptical wheel protrudes from the screw, the tighter the teeth arranged on the elliptical wheel bite the inner wall of the hole, and the tighter the expansion bolt is. The equipment often vibrates, shakes and pulls the expansion bolts. The greater the pulling force, the tighter the expansion bolts are, and they will not shake. It is stable. In short, the equipment of the present invention often vibrates, shakes and pulls the expansion bolts. The greater the pulling force, the tighter the expansion bolts are, and they will not shake. It is stable, and the force in the bolt hole is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a front view of the present invention; Figure 3 yes Figure 2 Enlarged view of a; Figure 4 yes Figure 2 Sectional view of AA; Figure 5 yes Figure 4 b is an enlarged view; Figure 6 It is a structural schematic diagram of the elliptical wheel and the retaining spring of the present invention; Figure 7 It is a structural schematic diagram of the elliptical wheel of the present invention; Figure 8 It is a structural schematic diagram of the screw rod, flat washer, nut and spring washer of the present invention; Fig. 9 It is a usage state diagram of the present invention; Fig.10 yes Fig. 9 Enlarged view of c.

[0010] Marking in the figure 1. Oval wheel, 2. Circlip, 3. Screw, 4. Flat washer, 5. Nut, 6. Spring washer, 7. Hole. DETAILED DESCRIPTION

[0011] The specific implementation methods, structures, features and functions of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0012] The present invention discloses a top-type novel expansion bolt, comprising an elliptical wheel 1, a retaining ring 2, a screw rod 3, a flat washer 4, a nut 5, and a spring washer 6. The flat washer 4 and the spring washer 6 are sleeved on the screw rod 3 and screwed into the nut 5. The elliptical wheels 1 are respectively placed in the grooves provided on the screw rod 3. The retaining ring 2 is clamped on the lower ends of the outer surfaces of the plurality of elliptical wheels 1. The screw rod 3 protrudes from the upper end of the elliptical wheel 1. The elliptical wheel 1 is provided with a plurality of teeth. The retaining ring 2 is elastic and has an opening that can be opened. The upper end of the screw rod (3) is square.

[0013] When using, see Figure 9-10, insert the screw 3 into the hole, the retaining spring 2 contracts through elastic force to make the teeth set on the elliptical wheel 1 contact with the inner wall of the hole 7, use a wrench to clamp the square head at the top of the screw 3 to prevent the screw 3 from rotating, move the nut 5, the nut 5 pulls the screw 3, the screw 3 pulls the equidistantly arranged elliptical wheels 1, and the teeth set on several elliptical wheels 1 bite the inner walls of the holes 7 respectively, so that the force in the bolt hole is uniform, and the nut 3 continues to be moved. The screw 3 pulls the elliptical wheel 1 so that the elliptical wheel 1 protrudes more from the screw 3, and the teeth set on the elliptical wheel 1 bite the inner wall of the hole 7 tighter. The greater the pulling force of the screw 3, the more the elliptical wheel 1 protrudes from the screw 3, the tighter the teeth set on the elliptical wheel 1 bite the inner wall of the hole 7, and the tighter the expansion bolt, so that the equipment often vibrates, shakes and pulls the expansion bolts. The greater the pulling force, the tighter the expansion bolts are, and it will not shake and is stable.

[0014] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A new top-type expansion bolt, comprising an elliptical wheel (1), a retaining ring (2), a screw rod (3), a flat washer (4), a nut (5), and a spring washer (6), wherein the screw rod (3) is covered with a flat washer (4), and the spring washer (6) is screwed into the nut (5), characterized in that; The elliptical wheels (1) are respectively placed in the grooves provided on the screw rod (3), the lower ends of the outer surfaces of the plurality of elliptical wheels (1) are clamped with retaining rings (2), and the upper ends of the elliptical wheels (1) protrude from the screw rod (3).

2. The top-type novel expansion bolt as claimed in claim 1, characterized in that; The elliptical wheel (1) is provided with a plurality of teeth.

3. The expansion bolt according to claim 1, characterized in that; The clamping spring (2) is elastic and is provided with an opening that can be opened.

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

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