CN218208076U - Limiting type over-screwing-prevention valve rod nut - Google Patents

Abstract

The utility model discloses a spacing formula is prevented crossing wrong valve-stem nut, the on-line screen storage device comprises a base, the top of base is provided with the barrel, the bottom block, and the base, the screw structure has all been seted up at the middle part of barrel and bottom block, be provided with the internal thread in the screw structure, the external screw thread has been seted up in the outside of top ring, internal thread cross section is trapezoidal, and be fixed with the packing ring at the middle part of internal thread including, through set up the packing ring structure in the internal thread including, the trapezoidal or dark V type's of cooperation internal thread cross section structure, the user can carry out interference fit with outside screw rod structure and inside internal thread structure, and then reach fixed effect, interference fit's resistance is felt can play prevents crossing wrong effect, improve the result of use.

Description

Limiting type over-screwing-prevention valve rod nut

Technical Field

The utility model relates to a nut structure field especially relates to spacing formula is prevented overgrating valve-stem nut.

Background

The nut is a threaded fastener, and the nut can be detached and reused, the nut is usually screwed on the external thread of the bolt to fasten a workpiece with pretightening force, and the phenomenon that the nut and the bolt are loosened often appears along with vibration or stress of the workpiece in practical application, so that the pretightening force is weakened or disappeared, and the fastened workpiece is loosened or falls off. According to statistics, safety accidents directly caused by loosening of threads happen occasionally, and some catastrophic accidents are avoided, so that certain potential safety hazards exist in the use of the traditional nut.

When the handle of the screw rod is rotated to be closed by force, the screw rod is damaged due to over-screwing due to over-violent force, and the screw rod cannot be completely fixed due to insufficient force; meanwhile, unnecessary troubles are brought to the daily life of people.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides a spacing formula prevents excessively twisting valve-stem nut can be through setting up the packing ring structure in the internal thread including, cooperates the internal thread cross section structure of trapezoidal or dark V formula, and the user can carry out interference fit with outside screw rod structure and inside internal thread structure, and then reaches fixed effect, and interference fit's resistance is felt can play prevents excessively twisting effect, improves the result of use.

In order to solve the technical problem, the utility model provides a following technical scheme: spacing formula is prevented mistake and is twisted valve-stem nut, including the base, the top of base is provided with barrel, bottom block, and the middle part of base, barrel and bottom block has all seted up the screw structure, be provided with the internal thread in the screw structure, the internal screw thread cross section is trapezoidal, just is in the internal screw thread middle part is fixed with the packing ring.

As an optimized technical scheme of the utility model, the outside of base all has fillet structure.

As an optimized technical scheme of the utility model, the bottom mounting of base has the antiskid packing ring.

Compared with the prior art, the utility model discloses the beneficial effect that can reach is:

in this device, through set up the packing ring structure in the internal thread, the internal thread cross section structure of trapezoidal or dark V type of cooperation, it carries out the valve and opens to drive the valve closure, when closing the action, better play transmission torque effect for valve-stem nut, and then the rotary motion of operating parts such as lifting hand wheel changes the rise of valve rod, the effect of action falls, have characteristics with low costs and long service life, the user can carry out interference fit with the screw structure of outside and the internal thread structure of inside, and then reach fixed effect, interference fit's resistance is felt can play prevents wrong effect, and the use effect is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view of the structure of the present invention;

fig. 3 is a schematic sectional structure of the present invention;

fig. 4 is a schematic view of the gasket structure of the present invention.

Wherein: 1. a base; 2. a screw cylinder; 3. a bottom block; 4. an internal thread; 5. a gasket.

Detailed Description

In order to make the technical means, creation features, achievement objects and functions of the present invention easy to understand, the present invention will be further explained with reference to the following embodiments, however, the following embodiments are only preferred embodiments of the present invention, and not all embodiments are included. Based on the embodiments in the embodiment, those skilled in the art can obtain other embodiments without making creative efforts, and all of them belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Example (b):

as shown in fig. 1-4, the utility model provides a spacing formula is prevented excessively twisting valve-stem nut, including base 1, base 1's top is provided with barrel 2, bottom block 3, and base 1, barrel 2 and bottom block 3's middle part has all seted up the screw structure, be provided with internal thread 4 in the screw structure, internal thread 4's cross section is trapezoidal, and is in internal thread 4's middle part is fixed with packing ring 5.

Through set up packing ring 7 structure in internal thread 6, the trapezoidal or 6 cross section structures of internal thread of dark V formula of cooperation, the user can carry out interference fit with the screw rod structure of outside and the internal thread 6 structure of inside, and then reaches fixed effect, and interference fit's resistance is felt and can be played and prevent wrong effect, improves the result of use.

In other embodiments, the outer side of the base 1 is provided with a round corner structure.

The fillet structure makes things convenient for base 1 to fix, improves fixed effect.

In other embodiments, the bottom end of the base 1 is fixed with an anti-slip gasket, and the anti-slip gasket structure fixed at the bottom end can improve the connection effect between the base 1 and the external structure, thereby avoiding the occurrence of a slip phenomenon.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (3)

1. Spacing formula is prevented excessively to twist stem nut, its characterized in that: including base (1), the top of base (1) is provided with barrel (2), bottom block (3), and the middle part of base (1), barrel (2) and bottom block (3) has all seted up the screw structure, be provided with internal thread (4) in the screw structure, the cross section of internal thread (4) is trapezoidal, just is in the middle part of internal thread (4) is fixed with packing ring (5).

2. The limiting type over-screwing prevention valve stem nut according to claim 1, characterized in that: the outer sides of the bases (1) are all provided with round corner structures.

3. The limited overthreading-prevention stem nut of claim 1, wherein: and an anti-skid washer is fixed at the bottom end of the base (1).

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