CN204755543U - Firm locknut - Google Patents

Abstract

The utility model discloses a stable anti-loosening nut, which comprises a nut body provided with a threaded hole in the axial direction, and is characterized in that: it also includes a pin hole, and a completely penetrating round hole is provided at the radial position of the nut body. Describe the pin hole, the nut body is a regular hexagonal body, the pin hole is located on any two opposite surfaces on the six sides of the nut body, the diameter of the pin hole is 1/3 of the diameter of the threaded hole, and the pin hole The chamfer is provided at the outer port, the chamfer forms an angle of 45° with the surface, and the depth is 1/4 of the diameter of the pin hole. The utility model completely penetrates the pin holes on the two opposite sides of the nut body, and inserts the pins into the pin holes after the nuts are tightened on the bolts, so that the nuts will not slip due to mechanical vibration, so as to stabilize and prevent loosening.

Description

A kind of stable anti-loosening nut

【Technical field】

The utility model relates to the technical field of mechanical fastening, in particular to the technical field of mechanical fastening and loosening.

【Background technique】

At present, among the general-purpose fastener components, the nut is a common and widely used component. However, nuts often loosen and fall off when they are subjected to strong vibrations and irregular strong fluctuations. The anti-slip and anti-falling measures are usually adopted by adding elastic washers or directly performing anti-slip treatment on the surface of the axial end of the nut. When the pre-tightening force is sufficient, the teeth will be embedded in the component to prevent loosening. The situation may be that the pre-tightening force is not enough, but the components with frequent vibrations will still loosen.

【Content of utility model】

The purpose of the utility model is to solve the problems in the prior art, and to propose a stable anti-loosening nut, which can realize that the nut does not loosen without strong external force.

In order to achieve the above object, the utility model proposes a nut body including a threaded hole in the axial direction, which is characterized in that: it also includes a pin hole, and the radial position of the nut body is provided with a completely penetrating round hole. The round hole is The pin hole, the nut body is a regular hexagonal body, the pin hole is located on any two opposite sides of the six sides of the nut body, the diameter of the pin hole is 1/3 of the diameter of the threaded hole, and the pin hole The port outside the hole is provided with the chamfer, the chamfer forms an angle of 45° with the surface, and the depth is 1/4 of the diameter of the pin hole.

Preferably, the pin matched with the pin hole is a cylinder, the cross-sectional diameter of the pin is larger than the diameter of the pin hole, the difference is 0.01 mm, and the length of the pin is smaller than the difference between the two opposite sides of the nut body by 3 mm.

Preferably, a concave gasket is provided between the nut body and the required fastener, and the concave gasket has a thickness of 1 cm, 50 mm, 10 mm, and 5 mm.

Preferably, the threaded hole is provided with an internal thread, and the thread is a zigzag thread.

Preferably, both ends of the threaded hole are provided with 45° chamfers.

Beneficial effects of the utility model: the utility model completely penetrates the two opposite sides of the nut body with pin holes, and after the nut is tightened on the bolt, the pin is inserted into the pin hole, and the nut will not slip due to mechanical vibration. To stabilize and prevent loosening.

The features and advantages of the utility model will be described in detail through embodiments in conjunction with the accompanying drawings.

【Description of drawings】

Fig. 1 is a side view of a solid anti-loosening nut of the utility model;

Fig. 2 is a schematic diagram of a fixed anti-loosening nut mating pin of the present invention;

Fig. 3 is a schematic diagram of a solid anti-loosening nut with gaskets of the present invention;

Fig. 4 is a schematic diagram of the installation of a firm anti-loosening nut according to the utility model.

【Detailed ways】

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the utility model includes a nut body 2 with a threaded hole 3 in the axial direction, and is characterized in that: it also includes a pin hole 1, a chamfer 11, and the radial position of the nut body 2 There is a completely through hole, the hole is the pin hole 3, the nut body 2 is a regular hexagonal body, the pin hole 1 is located on any two opposite sides of the six sides of the nut body 2, so The diameter of the pin hole 1 is 1/3 of the diameter of the threaded hole 3, the outer port of the pin hole 1 is provided with the chamfer 11, the chamfer 11 is at an angle of 45° with the surface, and the depth is the diameter of the pin hole 1 1/4. The pin 4 matched with the pin hole 1 is a cylinder, the cross-sectional diameter of the pin 4 is greater than the diameter of the pin hole 1, and the difference is 0.01mm, and the length of the pin 4 is less than the distance difference between the two opposite sides of the nut body 2 3mm. A concave washer 5 is provided between the nut body 2 and the required fastener. The concave washer has a thickness of 1 cm, 50 mm, 10 mm, and 5 mm. The threaded hole 3 is provided with an internal thread, and the thread is a zigzag thread. Both ends of the threaded hole are provided with 45° chamfers.

The working process of the utility model:

During the working process of a stable anti-loosening nut of the utility model, pin holes 1 are completely penetrated through the two opposite sides of the nut body 2, and at the same time, the bolts 6 that cooperate with the nut body 2 are provided with pin holes 1 at corresponding positions; The hole 1 fits and the nut cannot be tightened, so a gasket 5 is provided between the nut and the required fastening member, and considering the convenience of the installation of the gasket 5, the gasket 5 is set to be concave; the nut body 2 is attached to the bolt. 6. Insert the pin 4 into the pin hole 1 after the belt is tightened. Because the cross-sectional diameter of the pin 4 is larger than the diameter of the pin hole 1 and the length is smaller than the distance between the two opposite sides of the nut body 2, the nut will not slip due to mechanical vibration. To stabilize and prevent loosening.

The above-mentioned embodiment is an illustration of the utility model, not a limitation of the utility model, and any scheme after a simple transformation of the utility model belongs to the protection scope of the utility model.

Claims (5)

1. a firm lock nut, comprise the nut body (2) being axially arranged with tapped hole (3), it is characterized in that: also comprise pin-and-hole (1), chamfering (11), nut body (2) radial position is provided with the circular hole run through completely, this circular hole is described pin-and-hole (3), described nut body (2) is just hexagonal main body, described pin-and-hole (1) is positioned in any two opposites on nut body (2) six sides, described pin-and-hole (1) diameter is 1/3 of tapped hole (3) diameter, described pin-and-hole (1) external port place is provided with described chamfering (11), described chamfering (11) and face, place are 45° angle, the degree of depth is 1/4 of pin-and-hole (1) diameter.

2. a kind of firm lock nut as claimed in claim 1, it is characterized in that: the pin (4) that described pin-and-hole (1) coordinates with it is cylindrical body, (4) diameter of section is greater than pin-and-hole (1) diameter to pin, difference is 0.01mm, and the distance difference that pin (4) length is less than nut body (2) two opposition side is 3mm.

3. a kind of firm lock nut as claimed in claim 1, it is characterized in that: be provided with spill pad (5) between described nut body (2) and required fastening piece, spill pad has thickness to be that 1cm, 50mm, 10mm, 5mm are each some.

4. a kind of firm lock nut as claimed in claim 1, it is characterized in that: described tapped hole is provided with internal thread in (3), screw thread is sawtooth thread.

5. the firm lock nut of the one according to any one of Claims 1-4, is characterized in that: described tapped hole two ends are provided with 45 ° of chamferings.