CN215634270U

CN215634270U - Warning device for monitoring bolt looseness

Info

Publication number: CN215634270U
Application number: CN202120726863.2U
Authority: CN
Inventors: 刘治华; 郑凌硕; 牛志涛; 张银霞
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2021-04-11
Filing date: 2021-04-11
Publication date: 2022-01-25
Anticipated expiration: 2031-04-11

Abstract

The utility model discloses a warning device for monitoring bolt looseness, which comprises a hexagon head bolt, a hexagon nut, a nut sleeve, a backing ring, a mandrel sleeve, a spring and a clamp spring, wherein the nut sleeve is fixedly connected with the nut sleeve; the top of the hexagon head bolt is provided with a groove which is matched with a boss of a core shaft sleeve, the core shaft sleeve is matched with the core shaft, and a spiral spring is arranged between the core shaft sleeve and the core shaft; the nut sleeve is sleeved on the hexagon nut and rotates synchronously with the hexagon nut, a spline groove is formed in the upper end of the nut sleeve, four cushion rings staggered in an angle mode are installed in the spline groove, the mandrel is in contact with the cushion rings, and when the hexagon bolt and the hexagon nut rotate relatively, the mandrel sequentially skips the cushion rings under the action of spring force until the nut is popped out; in order to prevent the backing ring from falling out, a clamp spring is arranged on the outer side of the backing ring. Has the advantages that: the device simple structure is compact, and the assembly is high-efficient convenient, can play fine warning effect to the not hard up of bolt, and the not hard up of timely discovery bolt avoids causing serious consequence because of the bolt is not hard up.

Description

Warning device for monitoring bolt looseness

Technical Field

The utility model relates to a device for monitoring bolt looseness and warning.

Background

The bolt is used as a fastener for fixedly connecting two parts, is very common in the mechanical field, and is very easy to loosen in some large-scale mechanical equipment and vibration equipment, for example, on a vibration motor, when the motor works, the bolt continuously vibrates along with the motor, and the strength of a connecting structure of a motor base and a rack cannot be guaranteed after the bolt is loosened, so that the normal work of the vibration motor is influenced; for example, on a wind generating set, the tower barrel has a certain height, so that the bolt can be loosened under the action of an external wind couple, and the tower barrel shakes; after the bolts are fastened, in the use scenes of the equipment, maintenance personnel are required to regularly overhaul to ensure the connection strength of the bolts as fasteners, otherwise, safety accidents are easy to occur, the maintenance personnel do not know the loosening condition of the bolts before overhauling, regular maintenance can be carried out on all the bolts, the labor intensity is high, and the body health of the overhauling personnel is influenced due to poor working environment on site.

According to the problems, the loose bolt can be directly seen according to the condition that the mandrel pops up without overhauling all bolts, so that the loose bolt is overhauled in a targeted manner, and the labor intensity of maintenance personnel is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The technical scheme of the utility model is realized as follows:

a warning device for monitoring bolt looseness comprises a hexagon head bolt, a hexagon head nut, a mandrel assembly and a nut sleeve assembly, wherein the mandrel assembly is vertically arranged at the upper part of the hexagon head bolt and keeps rotating synchronously;

the top of the hexagon head bolt is provided with a groove which is matched and connected with the mandrel component so as to realize synchronous rotation;

the core shaft assembly comprises a core shaft sleeve, a boss of the core shaft sleeve is assembled with a groove at the top of the hexagon head bolt, the core shaft sleeve is also provided with a groove and is matched and connected with a boss of the core shaft, a spiral spring is arranged between the core shaft sleeve and the core shaft, and the spiral spring applies an elastic force to the core shaft;

the nut sleeve assembly comprises a nut sleeve, the nut sleeve is sleeved on a hexagon nut, a spline groove is formed in the upper portion of the nut sleeve, and a backing ring and a clamp spring are mounted in the spline groove;

when the hexagon head bolt is loosened, the hexagon head bolt and the hexagon nut rotate relatively, and the mandrel component and the nut sleeve component also rotate relatively;

further, relative rotation exists between the mandrel and the backing ring;

preferably, the mandrel is provided with two bosses, the backing ring is provided with a groove, and when the mandrel boss rotates to the position of the backing ring groove, the mandrel pops out of the backing ring;

further, the mandrel sequentially jumps over the four backing rings under the spring force of the spiral spring and finally pops up.

By adopting the technical scheme, the utility model has the beneficial effects that: the device has simple and compact structure, can directly find out the loosened bolts without overhauling all the bolts, thereby overhauling the loosened bolts in a targeted manner and greatly reducing the labor intensity of maintenance personnel. In addition, the relative angle between the four backing rings can be adjusted to adjust the bolt loosening sensitivity. The bolt loosening condition can be judged according to the popping degree of the mandrel.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a front cross-sectional view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a partial cross-sectional view of the present invention;

fig. 4 is a top view of the present invention.

The reference numerals are explained below:

1. a nut sleeve; 2. a backing ring; 3. a clamp spring; 4. a hexagon head bolt; 5. a hexagonal nut; 6. a core sleeve; 7. a mandrel; 8. a coil spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-4, a warning device for monitoring bolt looseness includes a hexagon head bolt 4, a hexagon nut 5, a core shaft sleeve 6 installed in cooperation with a groove at the top of the hexagon head bolt, and a core shaft 7 installed in cooperation with the core shaft sleeve 6, wherein a coil spring 8 is installed between the core shaft sleeve 6 and the core shaft 7; the nut sleeve 1 is matched with the hexagon nut 5 for installation, a spline groove is formed in the top of the nut sleeve 1, and the backing ring 2 and the clamp spring 3 are installed in the spline groove.

The device has the advantages of compact structure, high-efficiency and convenient assembly, convenient use and accurate monitoring, and is suitable for various occasions.

In particular use, the utility model will be described with reference to the accompanying drawings for ease of understanding.

The top of the hexagon head bolt is provided with a groove for being installed in a matched mode with a core shaft sleeve, the core shaft sleeve is installed in a matched mode with a mandrel, therefore the hexagon head bolt and the mandrel component can rotate synchronously, and the helical spring always has an axial elastic force on the mandrel in the rotating process.

Four backing rings are installed in the spline groove of the nut sleeve, each backing ring is provided with a boss and a groove, the bosses are used for being clamped in the spline groove to limit circumferential rotation of the backing rings, the four backing rings are installed at different angles, the grooves of the backing rings are matched with the bosses of the mandrel, and when the bosses of the mandrel rotate to the positions of the grooves of the backing rings, the mandrel jumps out of the backing rings under the action of elastic force of the spiral spring. The installation of different angles through the backing ring can make the dabber jump four backing rings in proper order when rotating, finally pop out. In order to limit the axial movement of the backing ring so as to fall out of the spline groove, a clamp spring is arranged at the outer end of the backing ring.

When the design installation, can be through changing the quantity of spline groove, or the mounted position of adjustment snap ring to make and become different angles between the four snap rings, thereby the adjustment is to the not hard up sensitivity that detects of bolt. The smaller the angle formed between the four clamping rings is, the easier the mandrel is to pop out, the mandrel popping can be observed by the rotation of a small angle between the bolt and the nut, and the detection sensitivity is high; the larger the angle formed between the four clamping rings is, the less easily the mandrel is popped up, and the detection sensitivity is low.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a warning device for monitoring bolt is not hard up which characterized in that: the hexagonal socket comprises a hexagonal head bolt (4), a hexagonal head nut (5) which is connected with the hexagonal head bolt (4) in a matched mode, a mandrel component which is vertically arranged on the upper portion of the hexagonal head bolt (4) and keeps synchronous rotation with the hexagonal head bolt, and a nut sleeve component which is installed in a matched mode with the hexagonal head nut (5).

2. A warning device for monitoring bolt loosening according to claim 1, wherein: the mandrel component comprises a mandrel sleeve (6) which is matched with the hexagon head bolt (4) for installation.

3. A warning device for monitoring bolt loosening according to claim 2, wherein: the core shaft sleeve (6) is provided with a groove for being matched and connected with a core shaft (7), and a spiral spring (8) is arranged between the core shaft (7) and the core shaft sleeve (6).

4. A warning device for monitoring bolt loosening according to claim 1, wherein: the nut sleeve assembly comprises a nut sleeve (1) and four backing rings (2).

5. A warning device for monitoring bolt loosening according to claim 4, wherein: the backing ring (2) is installed in a spline groove at the top of the nut sleeve (1) in an angle staggered mode, and the clamp spring (3) is installed outside the backing ring (2).