Screw tightness online real-time monitoring equipment

Abstract

The utility model discloses a screw tightness online real-time monitoring device, and relates to the technical field of bolt looseness monitoring. The device comprises a sensor assembly, a permanent magnet assembly and a supporting plate, the permanent magnet assembly comprises a threaded shaft sleeve with one closed end, and an elastic piece and an anti-skid base plate are arranged in the threaded shaft sleeve; a plurality of limiting grooves are formed in the inner wall of the threaded shaft sleeve, and the anti-skid base plate is connected with clamping blocks matched with the limiting grooves one to one. The elastic piece is located between the anti-skid base plate and the inner top wall of the threaded shaft sleeve, anti-skid lines are evenly distributed on the lower surface of the anti-skid base plate, the anti-skid base plate extrudes the elastic piece to deform, the friction force between the anti-skid base plate and the end face of the bolt column is increased, and therefore looseness prevention is achieved. When the threaded shaft sleeve and the bolt column are locked, the friction force between the anti-skid base plate and the end face of the bolt column is increased through the counter-acting force of the elastic piece, and therefore looseness prevention is achieved, and the problems that an existing threaded shaft sleeve is prone to looseness, and monitoring reliability and stability are poor are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bolt loosening monitoring, and particularly relates to an online real-time monitoring device for the tightness of screws. Background Technique

[0002] As a structural connecting piece, bolts are the most widely used fasteners in various industries such as railway bridges, aerospace, rail transit, automobile manufacturing, shipbuilding, wind power and nuclear power, and water conservancy construction. The fastening state of bolts is directly related to the safe operation of facilities and equipment in the industry. Once a bolt fails, the consequences are inestimable.

[0003] For example, Chinese Utility Model CN216049775U discloses a bolt loosening monitoring device, which includes a sensor assembly, a permanent magnet assembly, a support plate and a hoop; there are two support plates, which are respectively arranged on both sides of the sensor assembly. The two support plates are hooped outside the nut through the hoop, and one end of the permanent magnet assembly is arranged at the end of the bolt to be measured. Whether the bolt is loose or the nut is loose, the sensor assembly will measure the relative angular displacement and feedback it to an external monitoring system such as a host computer. The host computer monitors in real time through matrix or atlas analysis, and will generate an alarm when the warning loosening angle is reached.

[0004] However, in the prior art, the magnet base of the permanent magnet assembly is threadedly connected to the end of the bolt to be measured. Using threaded connection, compared with the nut on the bolt, the magnet base is more likely to loosen from the bolt, resulting in the deflection of the magnet base, which is very likely to cause false alarms and poor reliability and stability of the monitoring. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an online real-time monitoring device for the tightness of screws. When the threaded bushing is locked with the bolt column, the reaction force of the elastic member is used to increase the friction force between the anti-slip pad and the end face of the bolt column, so as to achieve anti-loosening, and solve the problem that the existing threaded bushing is easy to loosen, resulting in poor reliability and stability of the monitoring.

[0006] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] The utility model relates to an on-line real-time monitoring device for the tightness of screws, which comprises a sensor assembly, a permanent magnet assembly and a support plate. The permanent magnet assembly includes a threaded bushing with one end sealed and a permanent magnet fixedly connected to the upper end face of the threaded bushing. The inner wall of the threaded bushing is provided with internal threads matched with a bolt column, and an elastic member and an anti-slip pad are arranged inside. Wherein, a plurality of limiting grooves are formed in the inner wall of the threaded bushing, and the anti-slip pad is fixedly connected with clamping blocks respectively matched with the limiting grooves. The elastic member is located between the anti-slip pad and the inner top wall of the threaded bushing, and anti-slip lines are uniformly arranged on the lower surface of the anti-slip pad. When the threaded bushing is locked with the bolt column, the elastic member is deformed by the extrusion of the anti-slip pad, and thus, by the reaction force of the elastic member, the friction force between the anti-slip pad and the end face of the bolt column is increased, so as to achieve anti-loosening.

[0008] As a preferred technical solution of the utility model, a plurality of flat cutting surfaces are uniformly arranged on the outer circumferential surface of the threaded bushing, which is convenient for clamping and rotating the threaded bushing by a wrench.

[0009] As a preferred technical solution of the utility model, the anti-slip lines are of strip structures and are uniformly arranged along the circumference of the anti-slip pad.

[0010] As a preferred technical solution of the utility model, one side of the anti-slip lines facing the screwing direction of the threaded bushing and the bolt column is of an inclined surface structure, which is convenient for screwing and locking the threaded bushing.

[0011] As a preferred technical solution of the utility model, the cross section of the lower end of the support plate is of a V-shaped structure and is adapted to the corner position of the outer wall of the nut.

[0012] As a preferred technical solution of the utility model, the elastic member is a disc spring.

[0013] The utility model has the following beneficial effects:

[0014] By arranging an elastic member and an anti-slip pad inside the threaded bushing, when the threaded bushing is locked with the bolt column, the elastic member is deformed by the extrusion of the anti-slip pad, and by the reaction force of the elastic member, the friction force between the anti-slip pad and the end face of the bolt column is increased, so as to achieve anti-loosening. The utility model effectively avoids the loosening of the threaded bushing and the occurrence of false alarms, and greatly improves the reliability and stability of monitoring.

[0015] Certainly, when implementing any product of the utility model, it is not necessarily required to achieve all the above advantages simultaneously. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of an on-line real-time monitoring device for the screw tightening degree of the present utility model;

[0018] Figure 2 is Figure 1 a schematic structural diagram from the bottom view perspective;

[0019] Figure 3 is Figure 1 the front view of;

[0020] Figure 4 It is a schematic structural diagram of a permanent magnet assembly;

[0021] Figure 5 It is a half-sectional view of the permanent magnet assembly;

[0022] Figure 6 It is a schematic structural diagram of an elastic member and an anti-slip backing plate;

[0023] In the drawings, the list of components represented by each reference numeral is as follows:

[0024] 1 - Sensor assembly, 2 - Permanent magnet assembly, 3 - Support plate, 4 - Elastic member, 5 - Anti-slip backing plate, 201 - Threaded bushing, 202 - Permanent magnet, 203 - Limiting groove, 204 - Flat section, 501 - Block, 502 - Anti-slip pattern. Detailed implementation manners

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0026] In the description of the present utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or position relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0027] Please refer to Figures 1 to 3 As shown, the utility model is an on-line real-time monitoring device for the tightness of screws, including a sensor assembly 1, a permanent magnet assembly 2 and a support plate 3. The monitoring principles of the sensor assembly 1 and the permanent magnet assembly 2 are the same as those of the prior art in the background technology.

[0028] As Figure 4 and 5 shown, the permanent magnet assembly 2 includes a threaded bushing 201 with one end sealed and a permanent magnet 202 fixedly connected to the upper end face of the threaded bushing 201. If a counterbore is opened on the upper end face of the threaded bushing 201, the permanent magnet 202 is embedded in the counterbore.

[0029] The inner wall of the threaded bushing 201 is provided with internal threads that cooperate with the bolt column, and an elastic member 4 and an anti-slip pad 5 are installed inside. At the same time, six flat sections 204 are evenly distributed on the outer circumferential surface of the threaded bushing 201. When installing the threaded bushing 201, a wrench can be clamped on the flat section 204, so as to facilitate the clamping and rotation of the threaded bushing 201 by the wrench, ensuring that the threaded bushing 201 can be completely tightened on the bolt column.

[0030] Among them, four to six limiting grooves 203 are opened on the inner wall of the threaded bushing 201, and the anti-slip pad 5 is fixedly connected with a clamping block 501 that cooperates with the limiting grooves 203 one by one, so that the rotation of the anti-slip pad 5 in the circumferential direction relative to the threaded bushing 201 is restricted, and it can only move along the axial direction of the threaded bushing 201.

[0031] As Figure 6 shown, the elastic member 4 is located between the anti-slip pad 5 and the inner top wall of the threaded bushing 201, and anti-slip lines 502 are evenly arranged on the lower surface of the anti-slip pad 5. The anti-slip lines 502 are strip-shaped structures and are evenly distributed along the circumference of the anti-slip pad 5. And, the side of the anti-slip lines 502 facing the direction of screwing the threaded bushing 201 and the bolt column is a bevel structure, which can reduce the resistance when the threaded bushing 201 is locked with the bolt column, facilitating the screwing and locking of the threaded bushing 201.

[0032] When the threaded bushing 201 is locked with the bolt column, the threaded bushing 201 moves downward relative to the bolt column, and the gap between the upper end of the bolt column and the top wall of the threaded bushing 201 decreases, causing the anti-slip pad 5 to be squeezed against the elastic member 4. Through the deformation of the elastic member 4 caused by the extrusion of the anti-slip pad 5, the reaction force of the elastic member 4 is used to make the side of the anti-slip pad 5 with the anti-slip lines 502 closely adhere to the end face of the bolt column, and then the friction force between the anti-slip pad 5 and the end face of the bolt column increases, restricting the rotation of the threaded bushing 201 by the anti-slip pad 5, thereby realizing the anti-loosening of the threaded bushing 201, avoiding the loosening of the threaded bushing 201 and causing false alarms, and greatly improving the reliability and stability of the monitoring.

[0033] In addition, the elastic member 4 can be a disc spring. The number of disc springs installed can be one, or multiple disc springs can be stacked to increase the pre-tightening force. At the same time, the cross-section of the lower end of the support plate 3 is a V-shaped structure, and it is adapted to the corner position of the outer wall of the nut, so that the V-shaped structure at the lower end of the support plate 3 just catches on the corner of the nut during installation. The V-shaped structure can not only improve the structural strength of the support plate 3, but also effectively prevent the support plate 3 from tilting during installation due to its cooperation with the corner position of the nut, thereby effectively improving the accuracy and stability of the overall installation.

[0034] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An on-line real-time monitoring device for the tightness of screws, comprising a sensor assembly (1), a permanent magnet assembly (2) and a support plate (3), characterized in that: The permanent magnet assembly (2) includes a threaded bushing (201) with one end closed and a permanent magnet (202) fixedly connected to the upper end face of the threaded bushing (201); an internal thread matching with the bolt column is provided on the inner wall of the threaded bushing (201), and an elastic member (4) and an anti-slip backing plate (5) are installed inside; Wherein, a plurality of limiting grooves (203) are formed on the inner wall of the threaded bushing (201), and the anti-slip backing plate (5) is fixedly connected with clamping blocks (501) that are in one-to-one cooperation with the limiting grooves (203); The elastic member (4) is located between the anti-slip backing plate (5) and the inner top wall of the threaded bushing (201), and anti-slip lines (502) are evenly arranged on the lower surface of the anti-slip backing plate (5). When the threaded bushing (201) is locked with the bolt column, the elastic member (4) is deformed by squeezing the elastic member (4) through the anti-slip backing plate (5), so that the frictional force between the anti-slip backing plate (5) and the end face of the bolt column is increased by using the reaction force of the elastic member (4), thereby realizing anti-loosening.

2. An on-line real-time monitoring device for the tightness of screws according to claim 1, characterized in that, A plurality of flat cut surfaces (204) are evenly formed on the outer circumferential surface of the threaded bushing (201), which is convenient for clamping and rotating the threaded bushing (201) by a wrench.

3. An on-line real-time monitoring device for the screw tightening degree according to claim 1, characterized in that The anti-slip lines (502) are strip-shaped structures and are evenly arranged along the circumference of the anti-slip backing plate (5).

4. An on-line real-time monitoring device for the screw tightness according to claim 3, characterized in that, One side of the anti-slip lines (502) facing the screwing direction of the threaded bushing (201) and the bolt column is a bevel structure, which is convenient for screwing and locking the threaded bushing (201).

5. An on-line real-time monitoring device for the screw tightening degree according to claim 1, characterized in that, The cross section of the lower end of the support plate (3) is a V-shaped structure and is adapted to the corner position of the outer wall of the nut.

6. The on-line real-time monitoring device for the screw tightening degree according to claim 1, characterized in that, The elastic member (4) is a disc spring.

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