CN2720177Y

CN2720177Y - Anti-loosing device for nut

Info

Publication number: CN2720177Y
Application number: CN 200420060773
Authority: CN
Inventors: 黄林海
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-17
Filing date: 2004-08-17
Publication date: 2005-08-24
Anticipated expiration: 2014-08-17

Abstract

The utility model discloses an anti-loosing device for a nut, comprising a screw bolt and a nut. The screw bolt is sheathed with a pair of lock washers, the lock washers are annular disc-shaped, the front side of each lock washer is provided with radiation type ratchets which radiate from the center of circle to the circumferential direction, the back surface of each lock washer is provided with a convex rod, the nut is provided with a groove, and a connected machine fastener is also provided with a groove; while in use, the front sides of the two lock washers are opposite, the convex rod of on the back of each lock washer is respectively embedded with the nut and the machine fastener; the direction of tile of the ratchets decide that the two lock washers can only rotate in the right-handed direction; when the two lock washers rotate in the left-handed direction, the two lock washers are stopped by the ratchets, so the anti-loosing purpose of the nut is reached. With the lock washers of the utility model adopting the theory of ratcheting, the anti-loosing effect is reliable; with a plurality of ratchets of the two lock washers is uniformly distributed, the optimum position of screwing of the nut can be guaranteed.

Description

Nut anti-looseness device

Technical field

The utility model relates to the fastening connection piece technical field, specifically, relates to a kind ofly be used to prevent that the connecting bolt nut is being hit, is producing when vibrating loosening device.

Background technique

Bolt and nut is known fastening connection piece commonly used, its purposes is very extensive, when adopting bolts, some machines connect when fastening, it is hit during machine run, the connecting bolt at vibration position is easily loosening and influence the normal operation of machine, for addressing this problem, normally adopt hand inspection and adopt some anti-release member, as: Chemical Industry Press's second edition＜mechanical design handbook in 1979〉listed several anti-loose methods, but some connecting bolt can not running check, and＜mechanical design handbook on several anti-loose methods or unreliable, or can not make nut fastening in the optimum position.

Technology contents

The purpose of this utility model is intended to overcome above-mentioned prior art defective, provide a kind of nut anti-looseness device it can prevent effectively that nut is being hit, is producing when vibrating loosening and making nut fastening in the optimum position.

The purpose of this utility model is achieved in that a kind of nut anti-looseness device, it comprises screw bolt and nut, its improvement is also to be with a pair of lock washer on bolt, described lock washer is the ring-type dish, the front is to circumferencial direction radiation ratchet from the center of circle, a protruding rod is left at the back side of lock washer, on nut, be provided with groove, on connected machine fastening piece, also have groove, two packing rings are positive relatively during use, the only protruding rod in the back side respectively with nut and machine fastening piece on groove chimeric, the true dip direction of tooth has determined can only the dextrorotation direction to rotate between two packing rings, will be when left-handed by ratchet stop, thus reach the purpose of nut anti-looseness.

Lock washer in the utility model is copied the click principle, and anti-loosing effect is very reliable, and two packing ring ratchets are a plurality of even distributions, guarantees that nut can screw in the optimum position.

The concrete structure of model utility is provided by following examples and accompanying drawing.

Description of drawings

Fig. 1 is according to the nut anti-looseness device installation diagram that the utility model proposes;

Fig. 2 is the front view of lock washer;

Fig. 3 is the sectional view of lock washer;

Fig. 4 is the A-A partial sectional view of lock washer;

Fig. 5 is the nut front view;

Fig. 6 is the nut sectional view.

Embodiment

Embodiment 1: below in conjunction with details and the working condition of description of drawings according to the concrete device that the utility model proposes: consult Fig. 2, Fig. 3, Fig. 4, lock washer 3, the shape of lock washer 4 is the same with structure, be 12 ratchets that evenly distribute on the end face of each packing ring, these ratchets become radial arrangement from the center of circle to circumferencial direction, and evenly distribute along circumference.

The angle of ratchet and back side plane is 7 degree, and ratchet pushes up tooth root by processing counterclockwise, and the direction of ratchet is left-handed, when being about to direction that lock washer makes progress by ratchet and keeping flat, the one side of ratchet is upwards recessed, and among the embodiment that Fig. 3 draws, its spherical radius is 300 millimeters.

Consult Fig. 5, nut part figure shown in Figure 6 is processed with groove 9 on an end face of nut, and the groove shown in the figure is wide to be 3.5 millimeters, is 2.5 millimeters deeply, nut be 34.6 millimeters to angular length, screwhole diameter is 20 millimeters.

The drawn scheme of installation of this locking device of Fig. 1, it comprises a bolt 1, nut 2, lock washer 3, lock washer 4, fastening piece 5, lock washer all have ratchet 6, and have protruding excellent 7 and recessed excellent 8 respectively, and the one side of nut 2 has groove 9, also has groove 10. on the machine fastening piece 5

During installation,

lock washer

3,4 is used relatively, lock washer 4 can not be rotated, lock washer 3 is rotated 9 embeddings of protruding excellent 7 alignment indentation with nut 2, the dextrorotation fastening nut is the sliding friction that overcomes between the

lock washer

3,4; When left-handed (becoming flexible) trend, the ratchet of

lock washer

3,4 stops it left-handed, thereby plays the loosening effect that prevents.

Tighter when two lock washer tooth tops contact, meshing after more loose phenomenon, lock washer is a dish, eliminates it with resiliently deformable.Ratchet evenly distributes along circumference and makes the nut can be fastening in the optimum position.

Claims

1, a kind of nut anti-looseness device, it comprises screw bolt and nut, it is characterized in that: on bolt (1), also be with lock washer (3) and lock washer (4), described lock washer is the ring-type dish, the front be from the center of circle to circumferencial direction radiation ratchet (6), leave protruding rod (7) at lock washer (3) back side, leave protruding rod (8) at lock washer (4) back side, on nut (2), be provided with groove (9), on connected fastening piece (5), have groove (10).

2, locking device according to claim 1 is characterized in that: ratchet (6) evenly distributes along the circumference of lock washer.

3, locking device according to claim 1 is characterized in that: ratchet (6) is 7 degree with the angle on lock washer plane.

4, locking device according to claim 1 is characterized in that: the direction of ratchet (6) is left-handed.