CN210949485U

CN210949485U - Anti-loosening round nut

Info

Publication number: CN210949485U
Application number: CN201921187128.8U
Authority: CN
Inventors: 温上海; 魏军; 方波; 李玉博; 赖德清
Original assignee: Shenzhen Longcheng High Tech Environmental Protection Co ltd
Current assignee: Shenzhen Longcheng High Tech Environmental Protection Co ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-07-07
Anticipated expiration: 2029-07-26

Abstract

The utility model relates to a locking round nut solves the locking problem of round nut, the great round nut of specially adapted. The round nut comprises a nut main body, a pre-tightening nut and a fastener, wherein a groove is formed in one side of the nut main body, and a threaded hole is formed in the end face of the groove; the thread of the pre-tightening nut is consistent with the nut main body, and the side surface of the pre-tightening nut is provided with a mounting hole of the pre-tightening nut and a counter bore for mounting a screw; the nut body and the pre-tightening nut are connected by a screw, and a gap is required to be reserved between the nut body and the pre-tightening nut. The utility model discloses the terminal surface parallel and level, simple structure, occupation space not, and the nut loading is even, and is locking reliable, and the installation is dismantled conveniently, and the practicality is good.

Description

Anti-loosening round nut

Technical Field

The utility model belongs to the technical field of the nut, a locking round nut is related to.

Background

The round nut is a common fastener in the mechanical field, and the locking mode of the fastener is various. The screw thread can be loosened when the vibration, the rotation, the impact load and the environmental temperature change are large, and the anti-loosening technology of the screw thread is always improved.

The anti-loosening of the thread is to prevent the relative rotation of the thread by-product, and the common methods mainly comprise several methods:

1. the locking washer for the round nut is used, and the most common method is that the round nut and the shaft are simultaneously clamped and locked by the locking washer for the round nut, so that the purpose of locking is achieved. The method needs to open a groove on the shaft, increases the processing amount and reduces the strength of the shaft, and the stopping lug of the stop washer for the round nut and the stopping groove of the round nut cannot be aligned when the nut is screwed, so that small adjustment is needed;

2. the double round nuts are used, and the friction force between the thread pairs is increased through the axial force generated between the two nuts, so that the nuts are prevented from loosening automatically. The method can not effectively prevent the thread loosening caused by rotation and environmental temperature change;

3. after the screw thread kinematic pair relation is destroyed, the screw thread can be connected into a non-detachable connection by methods of filling points, welding, bonding and the like, and the kinematic pair characteristic is lost between the screw threads.

SUMMERY OF THE UTILITY MODEL

The utility model provides a locking round nut, it is effectual not only locking, and do not account for the space. Is particularly suitable for large round nuts.

The utility model discloses a locking round nut, mainly by nut main part, pretension nut and fastener constitute, the circle is the screw thread of connecting axle in the nut main part, one side sets up the recess, the recess terminal surface sets up the screw hole, is used for connecting pretension nut; the thread of the internal thread of the pre-tightening nut is consistent with the nut main body, the side surface of the pre-tightening nut is provided with a hole for mounting the pre-tightening nut, and a screw counter bore for mounting the pre-tightening nut and the nut main body is formed; the screw is used to connect the nut body and the pre-tightening nut.

The utility model provides a locking key of screw thread is: a gap is required to be reserved between the nut main body and the pre-tightening nut, and the two thread pairs are pre-tightened through the fastening piece, so that the two thread pairs generate opposite axial forces, and the friction force of the thread pairs is increased.

The pre-tightening nut is made of a material with good deformability, a certain pre-tightening force is generated by deformation of the pre-tightening nut, and the pre-tightening force of the two thread pairs can be controlled through the deformation.

The side surface of the pre-tightening nut is provided with a mounting hole for mounting the pre-tightening nut, and meanwhile, the pre-tightening nut can be used for observing a gap between the nut body and the pre-tightening nut, so that the post-mounting inspection is convenient.

The utility model discloses an effect: the nut can be prevented from loosening when the nut is vibrated, rotated, subjected to impact load and subjected to large environmental temperature change, the looseness prevention is reliable, and the nut is uniformly loaded. The round nut has the advantages of level end surface, simple structure, no space occupation, convenient installation and disassembly and good practicability.

Drawings

Fig. 1 is a schematic structural view-front view of a lock round nut of the present invention.

Fig. 2 is a sectional view taken along a sectional line a-a in fig. 1.

Fig. 3 is a sectional view taken along a sectional line B-B in fig. 1.

Fig. 4 is a partially enlarged view of fig. 2.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, the respective numbers indicate: the nut comprises a nut body 1, a pre-tightening nut 2, a nut body 3, a gap between the nut body and the pre-tightening nut 3, a screw 4, a spring washer 5, a nut body mounting hole 6 and a pre-tightening nut mounting hole 7.

The locknut at least comprises a nut main body, a pre-tightening nut and a fastener, wherein the inner circle of the nut main body 1 is a thread of a connecting shaft, the outer circle of the nut main body is provided with a mounting hole 6, one side of the outer circle is provided with a groove, and the end surface of the groove is uniformly provided with threaded holes for connecting the pre-tightening nut; the thread of the internal thread of the pre-tightening nut 2 is consistent with that of the nut main body, the side surface of the pre-tightening nut is provided with a hole 7 for mounting the pre-tightening nut, and a screw counter bore for mounting the pre-tightening nut and the nut main body is formed. The nut main body is installed through the nut main body installation hole 6, then the pre-tightening nut is installed through the pre-tightening nut installation hole 7, when the pre-tightening nut is installed, the gap 3 between the nut main body and the pre-tightening nut is kept, and the distance is determined according to materials and pre-tightening force required by calculation. And after the gap 3 is determined to be qualified, the nut main body 1 and the pre-tightening nut 2 are connected by using a screw 4 and a spring washer 5, pre-tightening force is applied, and the pre-tightening nut 2 deforms to enable the two groups of thread pairs to generate opposite axial force.

The groove is formed in one side of the nut body, the pre-tightening nut is arranged in the groove of the nut body after being installed, and the side face of the pre-tightening nut is provided with the installation hole, so that the outer side face is parallel and level, the structure is compact, and the appearance is attractive.

The pre-tightening nut is made of a material with good deformability, the pre-tightening force is provided through elastic deformation of the pre-tightening nut, and the pre-tightening nut is particularly effective for thread loosening caused by thermal deformation of the nut due to large environmental temperature change. The selection of the material can be comprehensively determined according to the use environment, the deformation amount and the pretightening force required by the anti-loosening.

The pretightening force is provided by screws connected with the nut main body and the pretightening nut, and the screws are uniformly arranged and at least more than 3, so that the stress of the thread pair is uniform; and selecting the specification of the connecting screw according to the requirement of pretightening force.

Claims

1. A circular anti-loose nut is characterized in that a nut body and a pre-tightening nut are installed on a shaft at the same time, a gap must be reserved between the two nuts, the nut body and the pre-tightening nut are connected through a fastener, the pre-tightening force is applied, and two thread pairs are pre-tightened through the fastener, so that the two thread pairs generate opposite axial forces to achieve an anti-loose effect.

2. The round locknut of claim 1, wherein a certain clearance must be reserved between the nut body and the pre-tightening nut.

3. The round locknut of claim 1, wherein the pre-tightening nut is made of a material with a deformation capability, and the pre-tightening force is provided by elastic deformation of the pre-tightening nut.

4. The round anti-loose nut as claimed in claim 1, wherein the pre-tightening nut is connected with the nut body by a screw, the connecting screws are arranged uniformly in a circumference, and the pre-tightening force between the nut body and the pre-tightening nut can be controlled by changing the size and the pre-tightening force of the connecting screws.