CN210423373U

CN210423373U - Never-loose screw with positive and negative threads

Info

Publication number: CN210423373U
Application number: CN201921326937.2U
Authority: CN
Inventors: 唐苍松
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-04-28
Anticipated expiration: 2029-08-14

Abstract

The utility model discloses a take positive and negative screw thread never become flexible screw belongs to fastener technical field, mainly is that the screw is not hard up and the practicality problem under solving the high vibrations of high frequency in the real life. The structure of the bolt mainly comprises a bolt main body with positive and negative threads, a right-handed toothed nut, a left-handed toothed nut and a C-shaped elastic cushion. The right-handed toothed nut, the C-shaped elastic cushion and the left-handed toothed nut are sleeved on the bolt main body with the positive and negative threads, and the right-handed toothed nut plays a role in fixing the bolt main body with the positive and negative threads. The left-handed toothed nut prevents the loosening of the right-handed toothed nut. The C-shaped elastic pad is sleeved between the right-handed toothed nut and the left-handed toothed nut to play a role in restricting the right-handed toothed nut and the left-handed toothed nut, so that the right-handed toothed nut and the left-handed toothed nut are prevented from loosening, and the C-shaped elastic pad is convenient to disassemble and only needs a screwdriver and a wrench.

Description

Never-loose screw with positive and negative threads

Technical Field

The utility model belongs to the technical field of screw fastener.

Technical Field

In current real life, several screw characteristics are such as:

firstly, the common screw is not loose and is easy to fall off: it is known that when a common screw is used on a device with a relatively high vibration strength, the nut on the screw will generally loosen or fall off after a long time.

Secondly, the anti-loosening screw cannot completely prevent loosening: some screws adopt variant positive and negative screw threads, and upper and lower double nuts have good anti-loosening effect, but can not have any length due to the limitation of the structure, and in addition, when the device is in violent vibrations, some outermost nuts can gradually become flexible (because outermost nuts do not have good anti-loosening measure), and finally double nuts are made to become flexible so as to drop.

Thirdly, the screw with good effect is inconvenient to operate and maintain, complex in process, high in cost and the like. Some screws are ensured not to loosen by using a method of embedding wedges, the effect is certainly good, but the operability and the practicability are not very strong. Some screws are never loosened and have the same effect, but the process is complex, the production cost is high, and the maintenance or the disassembly is not favorable.

Based on the defects, the inventor designs and develops the permanent non-loosening screw which is simple in process, convenient to operate and maintain and high in practicability according to actual experience.

Disclosure of Invention

The invention aims to overcome the defects and provide a never-loosening screw which is high in practicability, high in high-frequency and high-strength vibration resistance, simple in structure, easy to operate, easy to maintain and the like.

Detailed Description

Firstly, the structure of the screw with the positive and negative threads which is never loosened mainly comprises 1. a bolt body with the positive and negative threads, 2, a right-handed toothed nut (one surface of which is provided with teeth), 3, C-shaped elastic pads, and 4, a left-handed toothed nut (one surface of which is provided with teeth).

Secondly, the working principle of the never-loosening screw with the positive and negative threads is as follows: on the bolt main part that has positive and negative screw thread simultaneously, when twisting right-handed tooth nut (dentate face up) to suitable position along the positive line that has positive and negative bolt, the higher authority is put individual C type and is filled up, and then twists into along the anti-line that has the bolt main part of positive and negative screw thread left-handed tooth nut (dentate face down), makes C type play the both ends of filling up the perk deeply and detains on the tooth of right-handed tooth nut and the tooth of left-handed tooth nut, and the centre remains a slit can (convenient dismantlement).

Technical scheme

When the right-handed toothed nut is loosened, the right-handed toothed nut must rotate along the anticlockwise direction, because a C-shaped elastic cushion is pressed between the right-handed toothed nut and the left-handed toothed nut, the left-handed toothed nut is driven to rotate along with the anticlockwise direction under the tension of the elastic cushion, and the left-handed toothed nut is reversely threaded and is screwed on the bolt, the counterclockwise rotation of the left-handed toothed nut is tighter, so that the pressure of the right-handed toothed nut is greater and greater when the right-handed toothed nut is loosened, and the right-handed toothed nut can be forced to stop rotating, so that the effect of preventing the right-handed toothed nut from loosening is achieved.

If the left-handed toothed nut is loosened, one side with teeth of the left-handed toothed nut drives the C-shaped elastic cushion to rotate clockwise, and the other end of the C-shaped elastic cushion drives the right-handed toothed nut to rotate clockwise together. So that it will jam regardless of which nut is turned. Never loose.

Finally, the disassembly problem is as follows: if the C-shaped elastic pad needs to be detached, a screwdriver is inserted into the C-shaped elastic pad along a gap on the upper side of the C-shaped elastic pad, and the C-shaped elastic pad is pried upwards or downwards by a certain angle. Therefore, the outermost left-handed toothed nut can be screwed out in the clockwise direction, then the C-shaped elastic cushion is taken out, and then the right-handed toothed nut is screwed out. The entire assembly is intact.

Drawings

FIG. 1 is a schematic view of the novel structure of the present invention

Description of reference numerals: 1-bolt main body with positive and negative threads, 2-positive lines of bolt, 3-negative lines of bolt, 4-left-handed toothed nut, 5-C type elastic pad and 6-right-handed toothed nut.

Claims

1. The utility model provides a take positive and negative screw thread never becoming flexible screw, including bolt main part (1) that has positive and negative screw thread simultaneously, dextrorotation toothed nut (6), C type bullet pad (5), levogyration toothed nut (4), its characterized in that, dextrorotation toothed nut (6) can be twisted into along positive line silk way (2) of bolt main part (1) that has positive and negative screw thread, levogyration toothed nut (4) can be twisted into along anti-line silk way (3) of bolt main part (1) that has positive and negative screw thread, C type bullet pad (5) card is between dextrorotation toothed nut (6) and levogyration toothed nut (4).

2. The screw as claimed in claim 1, wherein the body (1) of the screw with both threads is provided with threads in both directions on the same screw.

3. The screw with positive and negative threads never loose as claimed in claim 1, wherein said right-handed toothed nut (6) is configured such that the inner thread path is right-handed and one of the upper and lower surfaces is designed to be toothed.

4. The positive and negative threaded never-loose screw according to claim 1, wherein the left-handed toothed nut (4) is arranged such that the internal thread path is left-handed and one of the upper and lower surfaces is designed to be toothed.

5. The screw as claimed in claim 1, wherein the C-shaped spring washer (5) is C-shaped, and the two sections of the spring washer are slightly tilted.