CN205744846U - Steel ball is compound to be prevented unloading anti-theft nut - Google Patents

Abstract

The utility model discloses a steel ball composite type anti-unloading and anti-theft nut. The main point of the technical scheme is that it includes a nut, and a groove is arranged on the inner hole wall of the nut, and the cross section of the groove is the inner wall of the nut connected at one end. On the surface, the other end is recessed in the arc shape of the nut, steel balls are installed in the groove, a plug sleeve that resists the steel ball is installed in the inner hole of the nut, and folds are arranged on the plug sleeve in the axial direction. The steel ball composite type anti-unloading anti-theft nut steel ball of the utility model is not easy to fall off, has the advantages of convenient installation and good anti-unloading and anti-theft effect.

Description

Steel ball composite anti-dump anti-theft nut

technical field

The utility model relates to a nut, in particular to a steel ball composite anti-unloading anti-theft nut.

Background technique

Commonly used radial locking anti-unloading and anti-theft fasteners generally use a single steel ball to contact, but due to the position of the nut when tightened, it may not be completely locked or the friction force is too small after locking and it is easy to break free; making the nut reliable. Poor performance, no anti-theft effect. Some nuts also use steel balls to prevent unloading and anti-theft, but the steel balls are not fixed with plug sleeves or fixed with common plug sleeves when the nuts are in use, which will easily cause difficult installation and steel balls to fall off during use.

Utility model content

Aiming at the deficiencies in the prior art, the purpose of this utility model is to provide a steel ball composite anti-dismantling anti-theft nut which is not easy to fall off, has convenient installation and good anti-disassembly and anti-theft effect.

In order to achieve the above purpose, the utility model provides the following technical solutions: a steel ball composite anti-unloading anti-theft nut, which includes a nut, the inner hole wall of the nut is provided with a groove, the cross section of the groove is one end Connect the inner wall surface of the nut, and the other end is concave in the nut in an arc shape. Steel balls are installed in the groove, and a plug sleeve that resists the steel ball is installed in the inner hole of the nut. The surface of the plug sleeve is located at the steel ball. A wrinkle groove is arranged in the axial direction, and the steel ball is located in the wrinkle groove.

The utility model is further configured as follows: two to three grooves are uniformly arranged on the wall of the inner hole of the nut.

The utility model is further configured as: the shape of the plug sleeve is convex.

The utility model is further configured as follows: the lower end of the convex edge of the plug sleeve is two to three pitches lower than the end face of the nut.

The utility model is further configured as: three folds on the plug sleeve are evenly distributed on the surface of the plug sleeve.

The utility model has the following advantages: through the cooperation of the steel ball and the arc-shaped groove, the nut can prevent the nut from turning over and falling off after use, and can prevent the nut from being stolen. , and set corresponding steel balls in each groove, so that the anti-disassembly strength of the nuts can be further improved. By setting the plug sleeves, it is possible to prevent the steel balls from falling off from the grooves when the nuts are not in use after they are produced. In some cases, by providing folds on the plug sleeve, the elasticity of the folds enables the plug sleeve to expand in the nut and withstand the steel ball, so that the steel ball can be prevented from falling off, and the plug sleeve can be prevented from being too small to cause the plug sleeve to dislodge from the nut. In the case of internal shedding, by setting three folds, the plug sleeve can be folded and popped open at the folds to improve the scalable size of the entire plug sleeve, which is convenient for the plug sleeve to be installed in the inner hole of the nut, and the shape of the plug sleeve is convex , so that the protruding edge of the plug sleeve avoids the situation that the plug sleeve is completely squeezed into the inner hole of the nut during the process of being installed on the nut.

Description of drawings

Fig. 1 is the structural representation of the utility model steel ball composite anti-unloading anti-theft nut;

Fig. 2 is the top perspective view of the nut of the present utility model;

Fig. 3 is the top view of the plug sleeve of the present utility model;

Fig. 4 is a sectional view of the plug sleeve of the steel ball of the present invention.

In the figure: 1, nut; 2, groove; 3, steel ball; 4, plug sleeve; 5, fold.

detailed description

Referring to Figures 1 to 4, a steel ball composite anti-dismounting and anti-theft nut of this embodiment includes a nut 1, a groove 2 is arranged on the inner hole wall of the nut 1, and the cross section of the groove 2 It is an arc shape in which one end is connected to the inner wall surface of the nut 1, and the other end is sunken in the nut 1. A steel ball 3 is installed in the groove 2. The depth and width of the groove 2 are greater than the diameter of the steel ball 3. The hardness of the steel ball 3 should be Reach 35-64HRC, the diameter is not less than 1mm, the inner hole of the nut 1 is equipped with a plug sleeve 4 that interferes with the steel ball 3, the large head is 2-5mm larger than the inner hole of the nut 1, and the small head is slightly larger than the inner hole of the nut 1, and the plug sleeve 4 The height of the small head part is 2-3 pitches less than the height of the nut 1, and the plug sleeve 4 is provided with folds 5 in the axial direction, and three folds 5 on the plug sleeve 4 are evenly distributed on the surface of the plug sleeve 4 .

Two to three grooves 2 are uniformly arranged on the wall of the inner hole of the nut 1 .

The shape of the plug sleeve 4 is convex.

The lower end of the convex edge of the plug sleeve 4 is two to three pitches lower than the end surface of the nut 1 .

By adopting the above technical scheme, the upper end of the plug sleeve 4 is larger and the lower end is smaller, and the lower end can be squeezed into the inner hole of the nut 1. Since the plug sleeve 4 has three folds 5 in the axial direction, it has certain elasticity and can expand in the inner hole of the nut 1 to block the The steel ball 3 is not easy to fall out; and the upper end is not easy to be squeezed into the inner hole of the nut 1, so that the distance between the lower end of the plug sleeve 4 and the lower end surface of the nut 1 can be easily controlled. When the nut 1 is in use, the threaded end of the nut 1 is screwed toward the bolt Insert, and the plug sleeve 4 will automatically slide out from the inner hole of the nut 1; the groove 2 in the nut 1 forms an arc wedge groove with the external thread of the bolt screwed in. After the nut 1 is locked, the steel ball 3 is sealed in the groove in slot 2. Due to the gravity of the steel ball 3 itself, the steel ball 3 will automatically slide into the place where the included angle of the wedge groove is small. Slip in the direction where the included angle of the wedge groove is small until it is completely locked, thereby locking the bolt and the nut 1, and because there are two to three steel balls 3 in the nut 1, the locking force is greater. This can ensure that the nut 1 cannot be unscrewed artificially under the condition that the nut 1 is not damaged, and has a good anti-unloading and anti-theft function.

Through the cooperation of the steel ball 3 and the arc-shaped groove 2, the nut 1 can prevent the nut 1 from turning over and falling off after use, and can prevent the nut 1 from being stolen. By setting two to three grooves 2, and Corresponding steel balls 3 are set in each groove 2, so that the anti-disassembly strength of the nut 1 after fitting can be further improved. By setting the plug sleeve 4, it is possible to place the steel ball 3 from the nut 1 when it is not in use after it is produced. In the case of falling off in the groove 2, by setting folds 5 on the plug sleeve 4, the elasticity of the folds 5 allows the plug sleeve 4 to expand in the nut 1 and withstand the steel ball 3, so that the steel ball 3 can be prevented from falling off. And it can avoid the situation that the plug sleeve 4 is too small to cause the plug sleeve 4 to fall off from the nut 1. By setting three folds 5, the plug sleeve 4 can be folded and popped open at the folds 5, and the scalable size of the entire plug sleeve 4 can be improved. , to facilitate the installation of the plug sleeve 4 into the inner hole of the nut 1, the shape of the plug sleeve 4 is convex, so that the convex edge of the plug sleeve 4 prevents the plug sleeve 4 from being squeezed into the nut 1 when it is installed on the nut 1 The situation in the inner hole.

Claims (5)

1. a steel ball is compound anti-unloads anti-theft nut, it is characterised in that: it includes nut, and the inner hole wall of described nut is arranged Having groove, the cross section of described groove is the inner wall surface of one end attaching nut, other end depression circular arc in nut, institute Being provided with steel ball in stating groove, the endoporus of described nut is provided with the plug sleeve of conflict steel ball, and described plug sleeve sets in axial direction It is equipped with fold.

Steel ball the most according to claim 1 is compound to be prevented unloading anti-theft nut, it is characterised in that: on the inner hole wall of described nut It is evenly arranged with two to three grooves.

Steel ball the most according to claim 2 is compound to be prevented unloading anti-theft nut, it is characterised in that: the shape of described plug sleeve is convex Font.

Steel ball the most according to claim 3 is compound to be prevented unloading anti-theft nut, it is characterised in that: the lower end, convex edge of described plug sleeve Less than two to three pitch of nut end face.

Steel ball the most according to claim 1 is compound to be prevented unloading anti-theft nut, it is characterised in that: the fold on described plug sleeve exists Plug sleeve surface is evenly distributed with three.