Eccentric wheel type expansion bolt

Abstract

The utility model discloses an eccentric wheel type expansion bolt which comprises an eccentric wheel (1), a pin (2), a torsion spring (3), a mounting groove (4), a screw rod (5), a gasket (6) and a nut (7), and the gasket (6) is sleeved on the screw rod (5) and screwed into the nut (7). The eccentric wheels (1) are respectively placed in the mounting grooves (4) arranged on the screw rod (5), the torsional spring (3) is inserted into the pin (2), one end of the torsional spring (3) is clamped on the screw rod (5), and the other end of the torsional spring (3) is clamped on the eccentric wheels (1). The expansion bolt is frequently vibrated, shaken and pulled, the larger the pulling force is, the tighter the expansion bolt is, and the expansion bolt does not shake and is stable.

Description

Technical Field

[0001] This utility model belongs to the field of bolt technology, specifically relating to an eccentric wheel 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. In existing technology, expansion bolts, despite having reverse threads, often fail to detach after loosening due to frequent vibration, shaking, and pulling when the equipment is fixed to walls, floors, or columns. This loosening can cause 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 an eccentric wheel type expansion bolt that is stable and does not shake when the equipment is frequently vibrating, shaking and being pulled. The greater the pulling force, the tighter the expansion bolt becomes.

[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 an eccentric wheel expansion bolt, comprising an eccentric wheel, a pin, a torsion spring, a mounting groove, a screw, a washer, a nut, and a spring washer. The washer and spring washer are fitted onto the screw and screwed into the nut. The eccentric wheel and torsion spring are respectively placed in the mounting groove on the screw and inserted into the pin. One end of the torsion spring is locked onto the screw, and the other end is locked onto the eccentric wheel.

[0006] The eccentric wheel is provided with several teeth that are inclined to one end.

[0007] The eccentric wheel can rotate on the pin with the pin as the center.

[0008] Compared with the prior art, this utility model has significant advantages. As can be seen from the above technical solution: an eccentric wheel and a torsion spring are placed in the mounting groove on the screw, with one end of the torsion spring secured to the screw and the other end to the eccentric wheel. When the screw is inserted into the hole, the torsion spring, through torque, causes the teeth on the eccentric wheel to contact the inner wall of the hole. Moving the nut pulls the screw, which in turn pulls the eccentric wheel. The teeth on the eccentric wheel grip the inner wall of the hole. Continuing to move the nut causes the screw to pull the eccentric wheel, causing it to rotate around the pin, making the eccentric wheel protrude from the mounting groove. The teeth on the eccentric wheel grip the inner wall of the hole more tightly. The greater the screw pull, the more the eccentric wheel protrudes from the mounting groove, 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 pull, the tighter the expansion bolt, preventing shaking and maintaining stability. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0010] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0011] Figure 3 This is the front view of this utility model;

[0012] Figure 4 This is a structural schematic diagram of the eccentric wheel, pin, and torsion spring of this utility model;

[0013] Figure 5 This is a schematic diagram of the structure of the mandrel of this utility model;

[0014] Figure 6 This is a diagram illustrating the use and installation of the eccentric wheel expansion bolt of this utility model.

[0015] Markings in the figure

[0016] 1. Eccentric wheel, 2. Pin, 3. Torsion spring, 4. Mounting slot, 5. Screw, 6. Washer, 7. Nut, 8. Spring washer, 9. Hole. Detailed Implementation

[0017] 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.

[0018] This utility model discloses an eccentric wheel expansion bolt, comprising an eccentric wheel 1, a pin 2, a torsion spring 3, a mounting groove 4, a screw 5, a washer 6, a nut 7, and a spring washer 8. The washer 6 and the spring washer 8 are fitted onto the screw 5 and screwed into the nut 7. The eccentric wheel 1 and the torsion spring 3 are respectively inserted into the mounting groove 4 on the screw 5 and inserted into the pin 2. One end of the torsion spring 3 is engaged with the screw 5, and the other end is engaged with the eccentric wheel 1. The eccentric wheel 1 is provided with several teeth inclined to one end, and the eccentric wheel 1 can rotate on the pin 2 with the pin 2 as the center.

[0019] When using, please refer to Figure 6 Insert screw 5 into hole 9. Torsion spring 3 causes the teeth on eccentric wheel 1 to contact the inner wall of the hole through torque. Move nut 7, nut 7 pulls screw 5, screw 5 pulls eccentric wheel 1, and the teeth on eccentric wheel 1 bite into the inner wall of hole 9. Continue to move nut 7, screw 5 pulls eccentric wheel 1 to rotate around pin 2, causing eccentric wheel 1 to protrude from mounting groove 4. The teeth on eccentric wheel 1 bite into the inner wall of hole 9 more tightly. The greater the pulling force of screw 5, the more eccentric wheel 1 rotates as it moves out of the hole, the more eccentric wheel 1 protrudes from mounting groove 4, and the tighter the teeth on eccentric wheel 1 bite into the inner wall of hole 9, the tighter the expansion bolt.

[0020] 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. An eccentric wheel type expansion bolt, comprising an eccentric wheel (1), a pin (2), a torsion spring (3), a mounting groove (4), a screw (5), a washer (6), a nut (7), and a spring washer (8), wherein the washer (6) and the spring washer (8) are fitted onto the screw (5) and screwed into the nut (7), characterized in that; The eccentric wheel (1) and the torsion spring (3) are respectively inserted into the mounting groove (4) of the screw rod (5) and the pin (2), the one end of the torsion spring (3) is clamped on the screw rod (5), and the other end is clamped on the eccentric wheel (1).

2. The eccentric expansion bolt of claim 1, wherein; The eccentric wheel (1) is provided with a plurality of teeth inclined to one end.

3. The expansion bolt of claim 1 wherein; The eccentric wheel (1) is rotatable on the pin (2) with the pin (2) as the center.

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