CN111473035A

CN111473035A - Locking device for stop groove nut

Info

Publication number: CN111473035A
Application number: CN202010409738.9A
Authority: CN
Inventors: 张德瑄; 申秀云
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-07-31
Also published as: CN111997983A

Abstract

The invention discloses a locking device of a stop groove nut. The stop tongues of the stop washer are respectively embedded into the stop grooves of the main nut and the auxiliary nut, so that the main nut and the auxiliary nut with different threads cannot rotate on the screw rod. The device can ensure that the threaded connection is long-term and reliable in looseness prevention under extreme severe working conditions such as vibration, impact and load variation. The device has simple structure and convenient operation, and can be repeatedly used. Is particularly suitable for important parts which are not frequently disassembled.

Description

Locking device for stop groove nut

Technical Field

The invention relates to the machinery manufacturing industry, in particular to a locking device of a stop groove nut.

Background

The existing anti-loosening methods have various advantages and disadvantages, such as friction anti-loosening, mechanical anti-loosening, structural anti-loosening and the like. The patent is also inspired by the patent of the invention of 'a locking device of a stop tongue nut' applied on the same day.

Disclosure of Invention

The invention utilizes the stopping tongue of the stopping washer (4) to be respectively embedded into the stopping groove of the main nut and the auxiliary nut, so that the main nut and the auxiliary nut with different threads can not rotate on the screw rod (11), thereby achieving the purpose of long-term anti-loosening of threaded connection.

The technical scheme is that the device comprises a main nut (1), a stop washer (4), an auxiliary nut (5) and a screw (11), the main nut (1) is a fastening nut, the auxiliary nut (5) is a stop nut, two different threads are machined on the screw (11), the main and auxiliary nuts with different threads are screwed on different threads corresponding to the screw (11), one of the main and auxiliary nuts is a stop groove nut, the stop grooves are respectively machined on the main and auxiliary nuts, a plurality of stop tongues are uniformly machined on the outer circumference of the stop washer (4), the front stop tongue (2) and the front stop tongue (3) and the rear stop tongue (7) and the rear stop tongue (8) are sequentially arranged, the front stop tongue (3) is embedded into the front stop groove (2), the rear stop tongue (8) is embedded into the rear stop groove (7), the main and auxiliary nuts cannot relatively rotate on the screw (11) after the front stop tongue (2) and the rear stop tongue (7) are respectively embedded into the front stop groove and the rear stop groove, the front stop tongue (7) and the rear stop tongue (7) is respectively embedded into the front stop groove and the rear stop groove, the rear stop tongue (7) and the rear stop tongue (7), the front stop tongue (7) and rear stop tongue (7) and the rear stop groove respectively, the rear stop tongue (7) and the rear tongue can not only can be relatively rotated, the rear stop tongue (7) and the rear tongue (7) and the stop tongue (7) and the rear tongue (7) and the stop tongue (7) and can not relatively rotated and the stop tongue (7) and the rear tongue (7) and the stop groove respectively and the stop tongue (7) and the stop groove, the stop tongue (7) and the rear tongue (7) and the stop tongue and the screw, the rear tongue can not relatively rotated and the rear tongue and the screw, the stop tongue can not relatively rotated and the screw, the screw can not only need to the screw, the screw can not only can be inserted into the screw, the screw can not rotated and the screw, the screw can be inserted into the screw.

The invention has the beneficial effects that: the invention has long-term and reliable looseness prevention of the threaded connection. The screw thread connection can be kept not to be loosened for a long time under extreme severe working conditions such as vibration, impact, load-bearing and the like, and the equipment maintenance cost and the accident rate are reduced. The invention can be repeatedly used, has simple structure, convenient assembly and disassembly and wide application. Is particularly suitable for important parts which are not frequently disassembled.

Drawings

FIG. 1 is a schematic structural view of a locknut device with a stop groove on a stepped shaft. The upper view is a front view of a-a rotation section, and the lower view is a plan view. The drawing shows a main nut (1), a front stop groove (2), a front stop tongue (3), a stop washer (4), an auxiliary nut (5), an auxiliary thread (6), a rear stop groove (7), a rear stop tongue (8), a main thread (9), a workpiece (10), a screw rod (11) and a flange plate (12).

Fig. 2 is a schematic view of the combination of the sub-nut (5) and the lock washer (4) taken separately from fig. 1. The upper view is a front view, and the lower view is a B-B rotation section plan view. Shown in the figure are a front stop tongue (3), a stop washer (4), a secondary nut (5), a rear stop groove (7), a rear stop tongue (8) and a flange (12).

Detailed Description

Example 1: as shown in fig. 1 and 2. The main nut (1) is an M16 hex nut. The upper end surface is provided with two front stop grooves (2) through the center processing, the included angle is 180 degrees, the groove width is 4mm, and the groove depth is 3 mm. The auxiliary nut (5) is a stop groove nut, the M12 left flange hexagon nut with the thread pitch of 1mm, the diameter of the flange (12) is 30mm, the thickness of the flange is 5mm, 13 45-degree oblique angle rear stop grooves (7) are uniformly distributed on the periphery of the flange, and the groove width is 4 mm. The thickness of the stop washer (4) is 1.2mm, 12 stop tongues are uniformly distributed on the outer circumference, the tongue width is 3.8mm, wherein 1 stop tongue is bent by 180 degrees to be used as a front stop tongue (3), and the other 11 stop tongues are used as a rear stop tongue (8). The main thread (9) of the screw (11) is M16, and the auxiliary thread (6) is a left fine thread with the thread pitch of M12 being 1 mm.

During assembly, the main nut (1) is screwed on the screw (11) to tighten the workpiece (10) to reach a specified pre-tightening force. A stop washer (4) is mounted, and a front stop tongue (3) is embedded into the front stop groove (2). And then the auxiliary nut (5) is screwed down, the screwing angle is finely adjusted, and a rear stop tongue (8) is embedded into the rear stop groove (7) to finish the assembly. When the auxiliary nut (5) is screwed down, the main nut (1) is stabilized to ensure that the pretightening force meets the regulations. After the assembly is finished, the main nut (1) and the auxiliary nut (5) can not rotate on the screw rod (11), and the purpose of long-term looseness prevention of threaded connection is achieved. When the nut is disassembled, the rear stop tongue (8) is pried out of the rear stop groove (7), and the auxiliary nut (5), the stop washer (4) and the main nut (1) can be disassembled in sequence.

The present invention is not limited to the above-described embodiments, and other structural designs obtained by using the same or similar structure to the above-described embodiments of the present invention are within the scope of the present invention.

Claims

1. A locking device of a stop groove nut is composed of a main nut (1), a stop washer (4), an auxiliary nut (5) and a screw rod (11), wherein the main nut (1) is a fastening nut, the auxiliary nut (5) is the stop nut, and the locking device is characterized in that the screw rod (11) is provided with two different threads, the main nut and the auxiliary nut with different threads are screwed on different threads corresponding to the screw rod (11), one of the main nut and the auxiliary nut is the stop groove nut, the stop grooves are respectively processed on the main nut and the auxiliary nut, a plurality of stop tongues are uniformly processed on the outer circumference of the stop washer (4), the locking device is sequentially divided into a front stop groove (2) and a front stop tongue (3) and a rear stop groove (7) and a rear stop tongue (8) before and after installation, the front stop tongue (3) is embedded into the front stop groove (2), and the rear stop tongue (8) is embedded.

2. The stop groove nut as claimed in claim 1, wherein the nut is a nut with a flange, a plurality of rear stop grooves (7) are uniformly formed on the end surface or the outer circumferential surface of the flange (12), and the number of the rear stop grooves (7) is within ± 1 of the number of the stop tongues.

3. Front retaining groove (2) according to claim 1, characterized in that it is machined on a non-retaining groove nut with a number of grooves 4 ≧ 2.

4. The retaining tongue of claim 1, further comprising a multi-layer construction having a number of layers greater than or equal to 1.

5. The different thread main and auxiliary nut of claim 1 wherein the threads are of different right and left hand or pitch and both right and left hand.

6. A rail fastening system, characterized in that it uses a locknut locking system as claimed in claim 1.

7. A steel structural coupling device, characterized in that it uses a locking groove nut locking device as claimed in claim 1.