Novel bolt pretightening force monitoring device

Abstract

The utility model discloses a novel bolt pre-tightening force monitoring device, which comprises a displacement sensor arranged on the top surface of a bolt; the cylindrical outer shell is fixedly arranged on the peripheral surface of the displacement sensor in a sleeving manner; the cylindrical lower cover is arranged on the peripheral surface of the cylindrical outer shell in a sleeving manner; and the wireless communication sensor is positioned above the displacement sensor, is connected with the displacement sensor and is fixed on the top surface of the cylindrical outer shell through the cylindrical lower cover. According to the utility model, wireless signal transmission is realized, and the problem that wiring cannot be carried out in some special occasions is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of bolt monitoring equipment technology, and in particular to a novel bolt preload monitoring device. Background Technology

[0002] High-precision displacement sensors are commonly used to monitor changes in bolt preload, such as the intelligent fastener preload monitoring system disclosed in Chinese invention patent CN107339309A. However, high-precision displacement sensors are typically connected via signal cables. In some special situations, it is impossible to lay out signal cables, making it impossible to use high-precision displacement sensors to monitor changes in bolt preload. Secondly, in some special vibration environments, high-precision displacement sensors are prone to loosening, affecting monitoring results. Furthermore, due to existing structural design limitations, sensor disassembly is also difficult.

[0003] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a new type of bolt preload monitoring device that enables wireless signal transmission, avoids loosening, and is easy to disassemble, in order to address the shortcomings of the existing technology.

[0005] The technical problem to be solved by this utility model can be achieved by the following technical solution:

[0006] A novel bolt preload monitoring device includes:

[0007] A displacement sensor, which is mounted on the top surface of the bolt;

[0008] A cylindrical outer casing fixedly mounted on the outer peripheral surface of the displacement sensor;

[0009] A cylindrical lower cover fitted onto the outer circumferential surface of the cylindrical outer shell; and

[0010] A wireless communication sensor is located above and connected to the displacement sensor, and is fixed to the top surface of the cylindrical outer casing by the cylindrical lower cover.

[0011] In a preferred embodiment of this utility model, a mounting protrusion is formed on the end face of the displacement sensor facing the bolt, a first external thread is formed on the outer peripheral surface of the mounting protrusion, and an inwardly recessed mounting groove is formed on the top surface of the bolt, and a first internal thread that mates with the first external thread is formed on the inner peripheral surface of the mounting groove; during installation, the mounting protrusion of the displacement sensor is screwed into the mounting groove of the bolt.

[0012] In a preferred embodiment of this utility model, the displacement sensor is a high-precision displacement sensor of model SEN920.

[0013] In a preferred embodiment of this utility model, the cylindrical outer shell and the displacement sensor are fixed by adhesive bonding, interference fit, or snap-fit.

[0014] In a preferred embodiment of this utility model, an upper annular limiting flange extending radially outward is formed on the top surface of the cylindrical outer shell, and a lower annular limiting flange extending radially inward is formed on the bottom surface of the cylindrical lower cover. A second internal thread is formed on the inner circumferential surface of the cylindrical lower cover, and a cylindrical mounting portion is formed on the end face of the wireless communication sensor facing the displacement sensor. A second external thread that mates with the second internal thread is formed on the outer cylindrical surface of the cylindrical mounting portion. During installation, the cylindrical mounting portion of the wireless communication sensor is screwed into the cylindrical lower cover until the lower annular limiting flange of the cylindrical lower cover abuts against the upper annular limiting flange of the cylindrical outer shell.

[0015] In a preferred embodiment of this utility model, a plurality of inclined limiting protrusions are circumferentially spaced around the end face of the wireless communication sensor facing the displacement sensor, and a spring pin seat is provided on the side of the cylindrical lower cover, with a spring pin inside the spring pin seat; during the process of the cylindrical mounting part of the wireless communication sensor being screwed into the cylindrical lower cover, the spring pin slides along the inclined surface of the inclined limiting protrusion, and when tightened, the spring pin is located between two adjacent inclined limiting protrusions.

[0016] In a preferred embodiment of the present invention, an annular sealing ring mounting groove is formed at the lower end face of the cylindrical mounting portion of the wireless communication sensor, and an annular sealing ring is embedded in the annular sealing ring mounting groove.

[0017] In a preferred embodiment of this utility model, the wireless communication sensor is a PWR-BLE-F wireless communication sensor.

[0018] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: This utility model realizes wireless signal transmission, effectively solving the problem of wiring not being possible in some special occasions. This utility model also has the advantages of being anti-loosening and easy to disassemble. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of the present invention.

[0021] Figure 2 yes Figure 1 A sectional view along the AA direction.

[0022] Figure 3 This is an exploded structural diagram of the present invention.

[0023] Figure 4 yes Figure 2 Enlarged diagram of point B.

[0024] Figure 5 yes Figure 3 Enlarged diagram of point C. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0026] See appendix Figures 1 to 3 The figure shows a new type of bolt preload monitoring device, which includes a displacement sensor 100, a cylindrical outer shell 200, a cylindrical lower cover 300, and a wireless communication sensor 400.

[0027] The displacement sensor 100 is mounted on the top surface of the bolt 10. Specifically, a mounting protrusion 110 is formed on the end face of the displacement sensor 100 facing the bolt 10. An external thread 111 is formed on the outer circumferential surface of the mounting protrusion 110. An inwardly recessed mounting groove (not shown in the figure) is formed on the top surface of the bolt 10, and an internal thread (not shown in the figure) is formed on the inner circumferential surface of the mounting groove to mate with the external thread 111. During installation, the mounting protrusion 110 of the displacement sensor 100 is screwed into the mounting groove of the bolt 10. Through the engagement of the external thread 111 and the internal thread, the displacement sensor 100 is securely mounted on the top surface of the bolt 10. At this time, the detection probe 120 of the displacement sensor 100 extends into the bolt 10 and abuts against the top surface of the displacement guide rod located inside the bolt 10 to sense the displacement of the displacement guide rod. In this embodiment, the displacement sensor 100 preferably adopts a high-precision displacement sensor of model SEN920.

[0028] The cylindrical housing 200 is fixedly mounted on the outer peripheral surface of the displacement sensor 100. The cylindrical housing 200 and the displacement sensor 100 can be fixed by adhesive, interference fit or snap-fit ​​to ensure that the cylindrical housing 200 and the displacement sensor 100 are fixedly connected.

[0029] A cylindrical lower cover 300 is fitted onto the outer circumferential surface of the cylindrical outer casing 200. A wireless communication sensor 400 is located above and connected to the displacement sensor 100, and is fixed to the top surface of the cylindrical outer casing 200 via the cylindrical lower cover 300. In this embodiment, the wireless communication sensor 400 is preferably a PWR-BLE-F model wireless communication sensor.

[0030] An upper annular limiting flange 210 extending radially outward is formed on the top surface of the cylindrical outer casing 200, and a lower annular limiting flange 310 extending radially inward is formed on the bottom surface of the cylindrical lower cover 300. An internal thread 320 is formed on the inner circumferential surface of the cylindrical lower cover 300. A cylindrical mounting portion 410 is formed on the end face of the wireless communication sensor 400 facing the displacement sensor 100, and an external thread 411 that mates with the internal thread 320 is formed on the outer cylindrical surface of the cylindrical mounting portion 410. During installation, first, fit the cylindrical lower cover 300 onto the outer circumference of the cylindrical outer shell 200, and place the wireless communication sensor 400 on the top surface of the cylindrical outer shell 200. Then, rotate the cylindrical lower cover 300 toward the wireless communication sensor 400, causing the cylindrical mounting portion 410 of the wireless communication sensor 400 to screw into the cylindrical lower cover 300 until the lower annular limiting flange 310 of the cylindrical lower cover 300 abuts against the upper annular limiting flange 210 of the cylindrical outer shell 200. At this point, the lower end face of the cylindrical mounting portion 410 of the wireless communication sensor 400 is pressed tightly against the top surface of the cylindrical outer shell 200. For improved sealing performance, see [link to documentation]. Figure 4 An annular sealing ring mounting groove 420 is formed at the lower end face of the cylindrical mounting portion 410 of the wireless communication sensor 400. An annular sealing ring 430 is embedded in the annular sealing ring mounting groove 420. At least a portion of the annular sealing ring 430 is exposed at the lower end face of the cylindrical mounting portion 410. By setting the annular sealing ring 430, the sealing performance between the lower end face of the cylindrical mounting portion 410 of the wireless communication sensor 400 and the top surface of the cylindrical outer casing 200 is effectively improved.

[0031] See Figure 4 and Figure 5 and combined Figure 2A plurality of inclined limiting protrusions 440 are circumferentially spaced around the cylindrical mounting portion 410 on the end face of the wireless communication sensor 400 facing the displacement sensor 100. A spring ejector seat 330 is provided on the side of the cylindrical lower cover 300, and a spring ejector pin 331 is provided inside the spring ejector seat 330. During the process of the cylindrical mounting portion 410 of the wireless communication sensor 400 being screwed into the cylindrical lower cover 300, the spring ejector pin 331 is always pushed outward and slides along the inclined surface of the inclined limiting protrusion 440. When tightened, the spring ejector pin 331 is located between two adjacent inclined limiting protrusions 440. When loosening occurs, because the spring ejector pin 331 is blocked at the right angle side of the inclined limiting protrusion 440, the cylindrical lower cover 300 cannot rotate relative to the wireless communication sensor 400, effectively preventing loosening. When disassembly is required, simply use a specific tool to press the spring pin 331 back into the spring pin seat 330, and then twist the cylindrical lower cover 300 to disassemble.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel bolt preload monitoring device, characterized in that, include: A displacement sensor, which is mounted on the top surface of the bolt; A cylindrical outer casing fixedly mounted on the outer peripheral surface of the displacement sensor; A cylindrical lower cover fitted onto the outer circumferential surface of the cylindrical outer shell; as well as A wireless communication sensor is located above and connected to the displacement sensor, and is fixed to the top surface of the cylindrical outer casing by the cylindrical lower cover.

2. The novel bolt preload monitoring device as described in claim 1, characterized in that, The displacement sensor has a mounting protrusion on its end face facing the bolt. A first external thread is formed on the outer circumferential surface of the mounting protrusion. An inwardly recessed mounting groove is formed on the top surface of the bolt. A first internal thread that mates with the first external thread is formed on the inner circumferential surface of the mounting groove. During installation, the mounting protrusion of the displacement sensor is screwed into the mounting groove of the bolt.

3. The novel bolt preload monitoring device as described in claim 1, characterized in that, The displacement sensor is a high-precision displacement sensor of model SEN920.

4. The novel bolt preload monitoring device as described in claim 1, characterized in that, The cylindrical outer shell is fixed to the displacement sensor by adhesive bonding, interference fit, or snap-fit.

5. The novel bolt preload monitoring device as described in any one of claims 1 to 4, characterized in that, An upper annular limiting flange extending radially outward is formed on the top surface of the cylindrical outer shell, and a lower annular limiting flange extending radially inward is formed on the bottom surface of the cylindrical lower cover. A second internal thread is formed on the inner circumferential surface of the cylindrical lower cover. A cylindrical mounting portion is formed on the end face of the wireless communication sensor facing the displacement sensor, and a second external thread that mates with the second internal thread is formed on the outer cylindrical surface of the cylindrical mounting portion. During installation, the cylindrical mounting portion of the wireless communication sensor is screwed into the cylindrical lower cover until the lower annular limiting flange of the cylindrical lower cover abuts against the upper annular limiting flange of the cylindrical outer shell.

6. The novel bolt preload monitoring device as described in claim 5, characterized in that, A plurality of inclined limiting protrusions are circumferentially spaced around the cylindrical mounting portion on the end face of the wireless communication sensor facing the displacement sensor. A spring pin seat is provided on the side of the cylindrical lower cover, and a spring pin is provided in the spring pin seat. During the process of the cylindrical mounting portion of the wireless communication sensor being screwed into the cylindrical lower cover, the spring pin slides along the inclined surface of the inclined limiting protrusion. When tightened, the spring pin is located between two adjacent inclined limiting protrusions.

7. The novel bolt preload monitoring device as described in claim 6, characterized in that, An annular sealing ring mounting groove is formed at the lower end face of the cylindrical mounting part of the wireless communication sensor, and an annular sealing ring is embedded in the annular sealing ring mounting groove.

8. The novel bolt preload monitoring device as described in claim 1, characterized in that, The wireless communication sensor used is a PWR-BLE-F model wireless communication sensor.

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