Bolt with locking device

Abstract

The utility model relates to the field of anti-loosening bolts, in particular to a bolt with an anti-loosening device, which comprises a fastened piece, a connecting piece and a bolt body, the connecting piece and the bolt body are vertically distributed on the fastened piece, an annular retaining groove is arranged in the connecting piece, a guide groove is arranged below the bolt body, and a pressure spring and a ball cylindrical pin are sequentially arranged in the guide groove. The utility model has the advantages that: firstly, the anti-loosening device can be applied to anti-loosening parts of larger bolt fasteners of various equipment, and is low in manufacturing cost; secondly, when the pre-tightening force of the bolt reaches the design, the anti-loose telescopic ball head cylindrical pin enters the retaining groove of the fastener under the elastic force action of the pressure spring, and the permanent anti-loose effect can be achieved; and thirdly, the bolt and the spring are placed in the bolt, so that the length of the bolt is shortened, the bolt automatically enters the groove, and alignment to the groove hole is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to anti -loose bolt technical field, concretely is a bolt with anti -loose device. BACKGROUND

[0002] Bolt is the common mechanical parts of all kinds of enterprise equipment, components, workpiece connection, is widely used in various mechanical equipment, and its working principle is to lock by the friction between bolt and workpiece. But in the dynamic load, the reliability of this locking will be reduced. In order to prevent the loosening of bolt, we often take some anti -loose measures in some special occasions, guarantee the reliability of bolt locking. Among them, the locking bolt is one of the anti -loose measures. At present, the common anti -loose method includes friction anti -loose, spring washer anti -loose, counter -bore bolt anti -loose, self -locking bolt anti -loose, elastic ring bolt anti -loose etc. This anti -loose way is convenient for the disassembly of bolt, but in the case of impact, vibration and variable load, it is easy to loosen, and the thread connection fails.

[0003] Such as patent document no. CN206290561U a self -tightening type anti -loose bolt, including bolt body, the bolt body is by self -tightening bolt, the screw nut, the bolt, the self -tightening spring, nut and clamping object are composed, the self -tightening bolt is equipped with screw nut, is equipped with bolt in screw nut, is equipped with self -tightening spring in the bottom of screw nut, the one end of self -tightening spring is connected with screw nut, the other end of self -tightening spring is connected with clamping object, is equipped with nut in the top of clamping object.

[0004] But this mechanism has the following problems: first, the self -tightening spring is arranged between the nut, increases the length of bolt, second, the bolt needs to be aligned with the hole, otherwise the bolt cannot penetrate the bolt. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a bolt with anti -loose device to solve the problems in the above background.

[0006] In order to realize the above -mentioned purpose, the utility model provides the following technical scheme: a bolt with anti -loose device, including fastening piece 5 and the upper and lower distribution connecting piece 1 and bolt body 2, characterized by: the connecting piece 1 is equipped with annular stop recess 3, the lower portion of bolt body 2 is equipped with guide groove 6 and guide groove 6 is sequentially equipped with pressure spring 7 and ball head cylindrical pin 4.

[0007] Further, the compression stroke of pressure spring 7 is greater than the depth of stop recess 3.

[0008] Further, the ball head of ball head cylindrical pin 4 faces stop recess 3.

[0009] The utility model has the following beneficial effects: first, it can be applied to the anti-loose part of large bolt fasteners of various equipment, and the manufacturing cost is low; second, when the bolt pre-tightening force reaches the design, the anti-loose telescopic ball head cylindrical pin enters the retreat-stop groove of the fastener under the elastic force of the pressure spring, and the permanent anti-loose effect can be realized; third, the bolt length is shortened and the bolt automatically enters the groove by putting the bolt and the spring into the bolt, thereby avoiding the alignment of the groove hole. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 The utility model structure schematic diagram.

[0011] In the drawing: 1, connecting piece, 2, bolt body, 3, retreat-stop groove, 4, ball head cylindrical pin, 5, fastened part, 6, guide groove, 7, pressure spring. DETAILED DESCRIPTION

[0012] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0013] Please refer to Figure 1 The utility model provides a kind of technical scheme: a bolt with anti-loose device, including fastened part 5 and the connecting piece 1 and bolt body 2 distributed on it.

[0014] Connecting piece 1 is equipped with annular retreat-stop groove 3, the lower portion of bolt body 2 is equipped with guide groove 6 and pressure spring 7 and ball head cylindrical pin 4 are sequentially equipped in guide groove 6, and the compression stroke of pressure spring 7 is greater than the depth of retreat-stop groove 3;The ball head of ball head cylindrical pin 4 is towards retreat-stop groove 3.

[0015] Artificially using simple flat head tool is pressed into ball head cylindrical pin 4 into bolt body 2, then continue to press bolt body 2, ball head cylindrical pin 4 moves downward along with bolt body 2 tightening, when design pre-tightening force reaches fastened part pressure, bolt body 2 reaches the retreat-stop groove 3 of tight connecting piece 1, along with a slight " click " sound, ball head cylindrical pin 4 enters the retreat-stop groove 3 of connecting piece 1, which achieves the purpose of preventing bolt loosening.

[0016] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A bolt with anti-loosening device, comprising a fastener (5) and a connecting member (1) and a bolt body (2) distributed thereon and below, characterized in that: The connecting piece (1) is internally provided with an annular retreat-stop groove (3), the lower part of the bolt body (2) is provided with a guide groove (6), and the guide groove (6) is sequentially provided with a pressure spring (7) and a ball head cylindrical pin (4).

2. A bolt with a loosening prevention device according to claim 1, characterized in that: The compression stroke of the pressure spring (7) is greater than the depth of the retreat-stop groove (3).

3. The bolt with anti-loosening device according to claim 1, characterized in that: The ball head of the ball head cylindrical pin (4) faces the retreat-stop groove (3).

Images