Eccentric wheel type expansion bolt
By adopting an eccentric wheel structure in the expansion bolt, the teeth on the eccentric wheel are used to bite the inner wall of the hole by using the torsion spring, the problem of the existing expansion bolt loose when the equipment is vibrated and the stable fixation of the equipment is achieved.
Patent Information
- Application Number
- CN202510295886.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2025-04-18
AI Technical Summary
Existing expansion bolts are prone to loosening when the equipment vibrates, shakes and pulls, resulting in unstable equipment.
The eccentric wheel expansion bolt is adopted. Through the structure of screw, eccentric wheel, torsion spring and pin, the torsion force of the torsion spring is used to make the teeth on the eccentric wheel bit the inner wall of the hole, increasing the tightening force of the bolt.
The expansion bolts are not loose when the equipment vibrates, shakes and pulls. The greater the tension, the tighter the bolts, ensuring the stability of the equipment.
Smart Images
Figure CN119844477A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of bolts, and in particular relates to an eccentric wheel type expansion bolt. Background Art
[0002] Expansion bolts are special threaded connectors used to fix pipe branches, hangers, brackets or equipment on walls, floors or columns. Expansion bolts in the prior art are often vibrated, shaken and pulled when the equipment is fixed on walls, floors or columns. Although there is a reverse buckle, the expansion bolts will 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 an eccentric wheel expansion bolt that can be used to frequently vibrate, shake and pull an expansion bolt. The greater the pulling force, the tighter the expansion bolt will be, and the eccentric wheel expansion bolt will not shake and is stable.
[0004] The purpose of the present invention and the solution of its main technical problems are achieved by adopting the following technical solutions: The eccentric wheel type expansion bolt of the present invention comprises an eccentric wheel, a pin, a torsion spring, a mounting groove, a screw rod, a gasket, a nut and a spring gasket. The gasket is sleeved on the screw rod, and the spring gasket is screwed into the nut. The eccentric wheel and the torsion spring are respectively placed in the mounting grooves arranged on the screw rod and the pin is inserted. One end of the torsion spring is clamped on the screw rod, and the other end is clamped on the eccentric wheel.
[0005] The eccentric wheel is provided with a plurality of teeth inclined toward one end.
[0006] The eccentric wheel can rotate on the pin with the pin as the center.
[0007] Compared with the prior art, the present invention has obvious beneficial effects; it can be known from the above technical scheme that the eccentric wheel and the torsion spring are respectively placed in the installation groove arranged on the screw rod, and one end of the torsion spring is clamped on the screw rod, and the other end is clamped on the eccentric wheel. The screw rod is inserted into the hole, and the torsion spring makes the teeth arranged on the eccentric wheel contact with the inner wall of the hole through the torque, and the nut is moved, the nut pulls the screw rod, the screw rod pulls the eccentric wheel, and the teeth arranged on the eccentric wheel bite the inner wall of the hole, and the nut is moved continuously, and the screw rod pulls the eccentric wheel to rotate on the pin with the pin as the center, so that the eccentric wheel protrudes out of the installation groove, and the teeth arranged on the eccentric wheel bite the inner wall of the hole more tightly. The greater the pulling force of the screw rod, the more the eccentric wheel protrudes out of the installation groove, the tighter the teeth arranged on the eccentric wheel bite the inner wall of the hole, and the tighter the expansion bolt is, so that the equipment is often vibrated, shaken and the expansion bolt is pulled, and the greater the pulling force, the tighter the expansion bolt is, and it will not shake and is stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 The structure of the present invention is schematically shown in FIG. Figure 1 ; Figure 2 The structure of the present invention is schematically shown in FIG. Figure 2 ; Figure 3 It is a front view of the present invention; Figure 4 It is a structural schematic diagram of the eccentric wheel, pin and torsion spring of the present invention; Figure 5 It is a structural schematic diagram of the eccentric wheel of the present invention; Figure 6 It is a usage state diagram of the present invention.
[0009] Marking in the figure 1. Eccentric wheel, 2. Pin, 3. Torsion spring, 4. Mounting slot, 5. Screw, 6. Washer, 7. Nut, 8. Spring washer, 9. Hole. DETAILED DESCRIPTION
[0010] 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.
[0011] The invention discloses an eccentric wheel type expansion bolt, comprising an eccentric wheel 1, a pin 2, a torsion spring 3, a mounting groove 4, a screw rod 5, a gasket 6, a nut 7, and a spring pad 8. The gasket 6 and the spring pad 8 are sleeved on the screw rod 5 and screwed into the nut 7, wherein the eccentric wheel 1 and the torsion spring 3 are respectively placed in the mounting groove 4 arranged on the screw rod 5 and the pin 2 is inserted therein, 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, a plurality of teeth inclined to one end are arranged on the eccentric wheel 1, and the eccentric wheel 1 can rotate on the pin 2 with the pin 2 as the center.
[0012] When using, see Figure 6 , insert the screw rod 5 into the hole 9, the torsion spring 3 makes the teeth provided on the eccentric wheel 1 contact with the inner wall of the hole through the torsion force, move the nut 7, the nut 7 pulls the screw rod 5, the screw 5 pulls the eccentric wheel 1, the teeth provided on the eccentric wheel 1 bite the inner wall of the hole 9, continue to move the nut 7, the screw 5 pulls the eccentric wheel 1 to rotate on the pin 2 with the pin 2 as the center, so that the eccentric wheel 1 protrudes out of the mounting groove 4, and the teeth provided on the eccentric wheel 1 bite the inner wall of the hole 9 tighter. The greater the pulling force of the screw rod 5, the more the eccentric wheel 1 moves out of the hole, the more it rotates, the more the eccentric wheel 1 protrudes out of the mounting groove 4, the tighter the teeth provided on the eccentric wheel 1 bite the inner wall of the hole 9, and the tighter the expansion bolt.
[0013] 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. An eccentric wheel type expansion bolt, comprising an eccentric wheel (1), a pin (2), a torsion spring (3), a mounting groove (4), a screw rod (5), a gasket (6), a nut (7), and a spring washer (8), wherein the gasket (6) and the spring washer (8) are sleeved on the screw rod (5) and screwed into the nut (7), characterized in that; The eccentric wheel (1) and the torsion spring (3) are respectively placed in the mounting groove (4) provided on the screw rod (5) and the pin (2) is inserted therein. 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 wheel expansion bolt according to claim 1, characterized in that; The eccentric wheel (1) is provided with a plurality of teeth inclined toward one end.
3. The expansion bolt according to claim 1, characterized in that; The eccentric wheel (1) is rotatable on the pin (2) with the pin (2) as the center.