CN210509904U

CN210509904U - Eccentric locknut assembly

Info

Publication number: CN210509904U
Application number: CN201921275573.XU
Authority: CN
Inventors: 李余松; 李永峰
Original assignee: Yueqing East Asia Fastener Co Ltd
Current assignee: Yueqing East Asia Fastener Co Ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-05-12
Anticipated expiration: 2029-08-07

Abstract

The utility model relates to a fastener technical field, concretely relates to eccentric formula locknut subassembly. The utility model discloses a main nut and deputy nut, be equipped with first internal thread on the main nut hole, main nut one end is equipped with first boss, the central axis of first boss is not concentric with first internal screw thread the central axis, be equipped with the second internal thread on the hole of deputy nut, second internal thread one end is equipped with first concave station, the central axis of second internal thread is not concentric with first concave station, first boss and first concave station are mutually supported, leave the clearance between main nut and the deputy nut assembly back. The first internal thread and the second internal thread are identical and are matched with the external thread on the bolt. Through increasing nylon cover, first eccentric instruction and the eccentric instruction of second, satisfying under the nut component has good locking performance condition, still convenient to detach, even the nut component still can be fine dismantlement when repairing.

Description

Eccentric locknut assembly

Technical Field

The utility model relates to a fastener technical field, concretely relates to eccentric formula locknut subassembly.

Background

At present, fasteners at the joints of a plurality of devices are loosened due to various factors such as vibration, impact load, thermal expansion and cold contraction, and the like, the conventional method can adopt a loose-proof form of a common nut plus an elastic cushion or a 1-type nonmetal insert hexagonal locknut in GB/T889.1-2000 standard to prevent loosening, but for parts needing strong impact and vibration, the conventional method only can delay loosening time, finally can cause parts to fall off and loosen, seriously can cause the devices to be damaged to be incapable of working, needs regular inspection, and provides the maintenance and use cost of the devices.

The railway such as high-speed rail, motor train and the like has higher requirements on looseness prevention, safety and the like for required fasteners. Chinese patent specification CN 105927653 a discloses a combined eccentric anti-loose nut, in which the thread center of the main and auxiliary nuts and the conical boss are eccentric to achieve the anti-loose purpose, but the nut and the bolt are usually made of steel, and even if the steel is subjected to anti-repair treatment, rust still occurs, and finally the bolt and the nut cannot be detached. Adopt the eccentric mode of major-minor nut, change the eccentric direction of major-minor nut during locking, even bolt and nut do not take place to rust, often hardly twist major-minor nut eccentric direction to unanimous when needs are dismantled, lead to bolt and nut to dismantle smoothly. If the nut assembly becomes loose and damaged, it is often necessary to replace the entire set of components if disassembly to retighten or replace the nut assembly is not possible.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of background art, the utility model provides an eccentric formula locknut subassembly:

the technical scheme of the utility model is that: including main nut and vice nut, be equipped with first internal thread on the main nut hole, main nut one end is equipped with first boss, the central axis of first boss is eccentric with first internal thread the central axis, be equipped with the second internal thread on the hole of vice nut, the internal threaded one end of second is equipped with first concave station, the central axis of the internal thread of second is eccentric with the central axis of first concave station, first boss and first concave station cooperate mutually, leave the clearance between main nut and the vice nut assembly back. The first internal thread and the second internal thread are identical and are matched with the external thread on the bolt.

Preferably, install the nylon cover in the first concave station, the nylon cover hole is equipped with the third internal thread, third internal thread's one end is equipped with the second concave station, first boss top is equipped with the second boss, the external diameter of second boss is less than the external diameter of first boss, the central axis of first boss is concentric with the central axis of second boss, the second concave station is mutually supported with the second boss, the central axis of third internal thread is not concentric with the central axis of second concave station.

Preferably, a first eccentricity indication is arranged on the outer periphery of the main nut, a second eccentricity indication is arranged on the outer periphery of the auxiliary nut, the first eccentricity indication and the second eccentricity indication are in the same eccentricity direction, and the first eccentricity indication and the second eccentricity indication are aligned with each other when the central axis of the first internal thread and the central axis of the second internal thread are concentric.

The eccentricity of the first boss and the first inner thread, the eccentricity of the second inner thread and the first concave table, and the eccentricity of the third inner thread and the second concave table are equal.

Preferably, the first eccentricity indication is shaped as a U-shaped slot and the second eccentricity indication is shaped as a U-shaped slot.

Preferably, the nylon sleeve is made of nylon.

The beneficial effects of the utility model are that, through increasing nylon cover, first eccentric instruction and the eccentric instruction of second, satisfying under the nut component has good locking performance condition, still convenient to detach, even the nut component still can be fine dismantlement when repairing.

Drawings

Fig. 1-2 are schematic structural diagrams of the present invention assembled with a bolt.

Fig. 3-4 are schematic structural views of the main nut of the present invention.

Fig. 5-6 are schematic structural views of the auxiliary nut of the present invention.

Fig. 7-8 are schematic structural views of the nylon sleeve of the present invention.

In fig. 1-8, a bolt 1, an external thread 11, a main nut 2, a first eccentricity indicator 21, a first internal thread 22, a first boss 23, a second boss 24, an auxiliary nut 3, a second eccentricity indicator 31, a second internal thread 32, a first concave platform 33, a nylon sleeve 4, a third internal thread 41, a second concave platform 42, a gap 5, and an eccentricity a.

Detailed Description

Embodiments of the invention are further described below with reference to the accompanying drawings:

as shown in fig. 1-8, this embodiment provides an eccentric locknut assembly, including bolt 1, main nut 2 and auxiliary nut 3, be equipped with first internal thread 22 on the 2 holes of main nut, 2 one end of main nut is equipped with first boss 23, the central axis of first boss 23 is decentraction with the central axis of first internal thread 22, be equipped with second internal thread 32 on the hole of auxiliary nut 3, the one end of second internal thread 32 is equipped with first concave station 33, the central axis of second internal thread 32 is decentraction with the central axis of first concave station 33, first boss 23 and first concave station 33 mutually support, leave clearance 5 between main nut 2 and the auxiliary nut 3 assembly. The first internal thread 22 and the second internal thread 32 are identical and cooperate with the external thread 11 on the bolt 1.

Still can very convenient dismantlement in order to make main nut 2 and vice nut 3 when taking place to rust, preferably, install nylon cover 4 in the first concave station 33, the 4 holes of nylon cover are equipped with third internal thread 41, the one end of third internal thread 41 is equipped with second concave station 42, first boss 23 top is equipped with second boss 24, the external diameter of second boss 24 is less than the external diameter of first boss 23, the central axis of first boss 23 is concentric with the central axis of second boss 24, second concave station 42 mutually supports with second boss 24, the central axis of third internal thread 41 is not concentric with the central axis of second concave station 42.

In order to facilitate the back-screwing of the primary nut 2 and the secondary nut 3 into a withdrawable state when the nut assembly is disassembled, it is preferable that a first eccentricity indication 21 is provided on the outer circumference of the primary nut 2, a second eccentricity indication 31 is provided on the outer circumference of the secondary nut 3, the first eccentricity indication 21 and the second eccentricity indication 31 are in the same eccentricity direction, and the first eccentricity indication 21 and the second eccentricity indication 31 are aligned with each other when the central axis of the first internal thread 22 and the central axis of the second internal thread 32 are concentric. When the first eccentricity index 21 and the second eccentricity index 31 are aligned with each other, the nut assembly can be unscrewed together.

In order to make the installation of the nut component and the bolt 1 easy, preferably, the eccentricity a of the first boss 23 and the second boss 24 and the first internal thread 22, the eccentricity a of the second internal thread 32 and the first concave table 33, and the eccentricity a of the third internal thread 41 and the second concave table 42 are all equal, and when the distance of the eccentricity a is larger, the better the anti-loosening performance between the product and the bolt is.

Preferably, the first eccentricity indication 21 is shaped as a U-shaped slot and the second eccentricity indication 31 is shaped as a U-shaped slot. The U-shaped groove is used for indicating, the processing speed is high, the processing cost is low, and even the main nut 2 and the auxiliary nut 3 are directly forged and pressed when blanks are forged and pressed.

Preferably, the nylon sleeve 4 is made of nylon. The nylon material has the advantages of good tensile strength, compressive strength, good toughness, wear resistance, corrosion resistance and the like, and is low in price.

The main nut 2, the auxiliary nut 3 and the nylon sleeve 4 are installed and matched with each other by a manufacturer, the first eccentricity indicator 21 and the second eccentricity indicator 31 are aligned with each other when the manufacturer leaves the factory, and the central axis of the first internal thread 22 on the main nut 2, the central axis of the second internal thread 32 on the auxiliary nut 3 and the central axis of the third internal thread 41 on the nylon sleeve 4 are concentric with each other.

The utility model discloses an installation step as follows:

1. the eccentric locknut component of the utility model is screwed on the outer bolt 11 of the bolt 1, and the main nut 2 and the auxiliary nut 3 are screwed together by using a sleeve or an outer hexagonal wrench during screwing, so as to prevent the first eccentricity indication 21 and the second eccentricity indication 31 from being staggered;

2. screwing the eccentric locknut assembly from the bolt 1 to the bottom;

3. two wrenches are used, one wrench fixes the main nut 2, the other wrench tightens the auxiliary nut 3, the second eccentricity indication 31 and the first eccentricity indication 21 are staggered, when the second eccentricity indication 31 is screwed for 180 degrees, the main nut 2, the auxiliary nut 3 and the bolt 1 are locked most tightly, and the locking force can be conditioned according to the screwing angle of the second eccentricity indication 31;

the utility model discloses a dismantle the step as follows:

1. aligning the second eccentric index 31 with the first eccentric index 21 with two wrenches, one to fix the main nut 2 and the other to screw the auxiliary nut 3;

2. the main nut 2 and the sub nut 3 are then unscrewed together with a socket or a alien wrench, while preventing the first eccentricity index 21 and the second eccentricity index 31 from being misaligned with each other.

The present embodiment should not be considered as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of the present invention.

Claims

1. An eccentric locknut component which characterized in that: including main nut (2) and vice nut (3), be equipped with first internal thread (22) on main nut (2) hole, main nut (2) one end is equipped with first boss (23), the central axis of first boss (23) is not concentric with the central axis of first internal thread (22), be equipped with second internal thread (32) on the hole of vice nut (3), the one end of second internal thread (32) is equipped with first concave station (33), the central axis of second internal thread (32) is not concentric with the central axis of first concave station (33), first boss (23) and first concave station (33) cooperate each other, leave clearance (5) between main nut (2) and vice nut (3) assembly.

2. The eccentric locknut assembly of claim 1 wherein: install nylon cover (4) in first concave station (33), nylon cover (4) hole is equipped with third internal thread (41), the one end of third internal thread (41) is equipped with second concave station (42), first boss (23) top is equipped with second boss (24), the external diameter of second boss (24) is less than the external diameter of first boss (23), the central axis of first boss (23) is concentric with the central axis of second boss (24), second concave station (42) and second boss (24) cooperate each other, the central axis of third internal thread (41) is not concentric with the central axis of second concave station (42).

3. The eccentric locknut assembly of claim 1 wherein: the main nut (2) is provided with a first eccentricity indicator (21) on the outer periphery, the auxiliary nut (3) is provided with a second eccentricity indicator (31) on the outer periphery, the first eccentricity indicator (21) and the second eccentricity indicator (31) are in the same eccentricity direction, and the first eccentricity indicator (21) and the second eccentricity indicator (31) are aligned with each other when the central axis of the first internal thread (22) and the central axis of the second internal thread (32) are concentric.

4. An eccentric locknut assembly according to claim 3 wherein: the first eccentricity indicator (21) is shaped as a U-shaped slot and the second eccentricity indicator (31) is shaped as a U-shaped slot.

5. An eccentric locknut assembly according to claim 2 wherein: the nylon sleeve (4) is made of nylon.