CN201236876Y

CN201236876Y - Anti-loosing mechanism for nut

Info

Publication number: CN201236876Y
Application number: CNU200820040151XU
Authority: CN
Inventors: 王志勇
Original assignee: CRRC Qishuyan Institute Co Ltd
Current assignee: CRRC Qishuyan Institute Co Ltd
Priority date: 2008-06-27
Filing date: 2008-06-27
Publication date: 2009-05-13
Anticipated expiration: 2018-06-27

Abstract

The utility model relates to an anti-loose technology for a threaded part, in particular to an anti-loose mechanism for a nut. According to the technical proposal provided by the utility model, the anti-loose mechanism comprises a bolt, a nut and a support. The anti-loose mechanism is characterized in that a flank vertical to the support is arranged on the support, a lock pin is hinged on the flank, and a positioning part is arranged on the lock pin; the support is sleeved on the bolt; and after the nut and the bolt are connected together through the positioning part of the lock pin, the positioning part is jointed with one side of the nut. The anti-loose mechanism can further enhance the anti-loose performance of the threaded part, and can avoid the possibility of failure because of loosening of the threaded part.

Description

Nut anti-looseness mechanism

Technical field

The utility model relates to the loosing Prevention Technology of threaded piece, specifically a kind of nut anti-looseness mechanism.

Background technique

Under complex working condition effects such as variable load, impact, vibration, temperature, be threaded and all exist loosening danger of losing efficacy.The nut anti-looseness method is a lot of at present, with regard to working principle, can be divided into and utilize friction, destroys the screw pair kinematic relation and directly pin three types.There are the following problems mostly for these locking modes:

1, owing to conventional locking mode is not fixed as one bolt, nut, cause under complex working conditions such as variable load, impact, vibration, temperature, the pretightening force of bolt will be followed and be had greatly changed, rely on pretightening force to realize that locking mode will lose efficacy, simultaneously, the existence of vibration, the destruction that causes friction pair, cohesive body etc., bolts and nuts still can produce relative movement, thereby make locking inefficacy.

2, destroy screw pair, direct locking mode such as pinning, all have shortcomings such as reusability is poor, poor stability, installing/dismounting inconvenience to some extent.

3, only rely on one or both locking modes to realize the locking of threaded piece, stability is not high.

Summary of the invention

The purpose of this utility model is to design a kind of nut anti-looseness mechanism, and with the anti-loosening property of further raising threaded piece, that effectively avoids breaking down because of threaded piece is loosening may.

According to the technological scheme that the utility model provides, described locking gear comprises bolt, nut and support, it is characterized in that: the flank perpendicular to support is set on support, and hinged lock pin on described flank is provided with the positioning part on described lock pin; Described support is connected with bolt, preferably is maintained fixed with bolt to be connected, and can not relatively rotate; Fit with some sides of nut after nut and bolt are linked together in the positioning part of described lock pin.Described support preferably is maintained fixed with bolt and is connected, and can not relatively rotate.

Described nut comprises first nut and second nut, after being connected first nut and second nut on the bolt, described first nut and second nut are close together (promptly connecting according to pairs of anti-loose nut mode and bolt), and first nut aligns respectively with each side of second nut.

End at the thread section of bolt is provided with through hole, and cotter pin is arranged in through hole.One end of described lock pin utilizes rivet to be movably riveted on the flank of support; The other end of described lock pin utilizes screw and flank to interconnect when being in user mode.Described lock pin comprises the link arm that lays respectively at the lock pin two ends and is positioned at the positioning part at lock pin middle part that described positioning part protrudes in the plane at two link arm places.

The use of lock pin nut and support are become one, and support has been realized fixedlying connected and can not have been relatively rotated, thereby made bolts and nuts become one with bolt, fundamentally stopped the possibility that nut loosening lost efficacy, and has broken away from the requirement to bolt pretightening.And comprehensively use conventional locking modes such as pairs of anti-loose nut, cotter pin be locking, and under the situation of the locking inefficacy of lock pin, still there is conventional locking mode to realize locking purpose, improved locking stability and reliability.Easy to assembly, simultaneously, realized functions such as detachable, repeated use.

Compared with prior art, the utlity model has following advantage: 1, lock pin is locking, has fundamentally stopped the possibility that nut loosening lost efficacy, and breaks away from the requirement to bolt pretightening, and is applied widely; 2, multistage combination is locking, has strengthened reliability; 3, reusable, reduced cost; 4, assembling, convenient disassembly.

Description of drawings

Fig. 1 is a structural drawing of the present utility model.

Fig. 2 is the right elevation of figure.

Fig. 3 is the plan view of Fig. 1.

Embodiment

As shown in the figure: described locking gear comprises bolt 2, nut and support 5, it is characterized in that: the flank 7 perpendicular to support 5 is set on support 5, and hinged lock pin 6 on described flank 7 is provided with positioning part 11 on described lock pin 6; Described support 5 is fixed on the bolt 2; Fit with some sides of nut after nut and bolt 2 are linked together in the positioning part of described lock pin 6.

Described nut comprises first nut 3 and second nut 4, after being connected first nut 3 and second nut 4 on the bolt 2, described first nut 3 and second nut 4 are close together, and first nut 3 aligns respectively with each side of second nut 4, so that and positioning part 11 applyings of lock pin 6.End at the thread section of bolt is provided with through hole, has inserted the cotter pin 1 of lock function in through hole.

One end of described lock pin 6 utilizes rivet 12 to be movably riveted on the flank 7 of support 5; The other end of described lock pin 6 utilizes screw 8 and flank 7 to interconnect when being in user mode, see shown in Figure 2, the dotted portion of upper right side is lock pin 6 schematic representation when being in without state among the figure, the schematic representation the when solid line of sequence number 6 indications partly is in user mode for lock pin 6 among the figure.Described lock pin 6 comprises the link arm 9 that lays respectively at lock pin 6 two ends and is positioned at the positioning part 11 at lock pin 6 middle parts that described positioning part 11 protrudes in the plane at two link arm 9 places.During use, lock pin 6 is turned to its positioning part 11 around rivet 12 be fitted on the side of first nut 3 and second nut 4, make first nut 3 and second nut, 4 an ancient unit of weight be subjected to the restriction of positioning part 11 and can't rotate, with

first nut

3 and 4 lockings of second nut.

During use, the utility model has adopted three grades of locking measures:

1, lock pin is locking: with lock pin 6 rotations, make the positioning part 11 of protrusion on the lock pin 6 and the lateral surface compressing of double nut, fixing lock pin 6 again, because support is fixedlyed connected with bolt, can not relatively rotate, lock pin on the support can't rotate nut relative to lock pin, from but nut and bolt become one, stopped loosening possibility;

2, pairs of anti-loose nut: when first nut 3 is assembled to desired location, press second nut 4, guaranteeing has certain pressure between two nuts, make six sides alignment of two nuts simultaneously, a side of double nut is threaded to the position parallel with the positioning part 11 of lock pin 6 again;

3, cotter pin 1 is locking.

So, realized that three grades of combinations are locking, broken away from the requirement to bolt 2 pretightening forces, fundamentally stopped the possibility that nut loosening lost efficacy, anti-loosening property is stable, reliable.Simultaneously, convenient disassembly, reusable.

The utility model is specially adapted to bullet train with the lifting of hitch bracket and be fastenedly connected, and also can use in the demanding field of other anti-loosening properties.

Claims

1, nut anti-looseness mechanism comprises bolt (2), nut and support (5), it is characterized in that: go up the flank (7) that is provided with perpendicular to support (5) at support (5), go up hinged lock pin (6) at described flank (7), positioning part (11) is set on described lock pin (6); Described support (5) is fixedlyed connected with bolt (2); Fit with some sides of nut after nut and bolt (2) are linked together in the positioning part (11) of described lock pin (6).

2, nut anti-looseness as claimed in claim 1 mechanism, it is characterized in that: described nut comprises first nut (3) and second nut (4), after being connected first nut (3) and second nut (4) on the bolt (2), described first nut (3) is close together with second nut (4), and first nut (3) aligns respectively with each side of second nut (4).

3, nut anti-looseness as claimed in claim 1 mechanism is characterized in that: the end at the thread section of bolt is provided with through hole, and cotter pin (1) is arranged in through hole.

4, nut anti-looseness as claimed in claim 1 mechanism, it is characterized in that: an end of described lock pin (6) utilizes rivet (12) to be movably riveted on the flank (7) of support (5); The other end of described lock pin (6) utilizes screw (8) and flank (7) to interconnect when being in user mode.

5, nut anti-looseness as claimed in claim 1 mechanism, it is characterized in that: described lock pin (6) comprises the link arm (9) that lays respectively at lock pin (6) two ends and is positioned at the positioning part (11) at lock pin (6) middle part that described positioning part (11) protrude in the plane at two link arms (9) place.