A force measuring and calibration device for axial locking members

Abstract

The utility model discloses a force measuring and calibrating device of axial locking component, including the force measuring and calibrating device of bearing locking component axial force, the force measuring and calibrating device includes the pressure bearing part along locking component axial distribution, is equipped with the force measuring assembly for detecting locking component axial force and the calibration unit of the calibration force measuring assembly measured value on the pressure bearing part. The utility model can detect the pre -tightening force of bolt type locking component, judges locking effect whether to meet the requirement, can also calibrate the pre -tightening force of detection simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of force measurement and calibration technology, specifically to a force measurement and calibration device for an axial locking component. Background Technology

[0002] Bolt-type locking components are generally used in structural engineering to lock two parts together. They provide a preload to the two parts and then lock them in place. The greater the preload, the better the locking effect and the less likely the two parts are to loosen. However, after locking, the preload of bolt-type locking components cannot be directly measured, making it impossible to immediately determine whether the locking effect meets the standard. At the same time, it is also impossible to calibrate the measured preload. Utility Model Content

[0003] The purpose of this utility model is to provide a force measuring and calibration device for axial locking components, which can detect the preload of bolt-type locking components, determine whether the locking effect meets the requirements, and calibrate the detected preload.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0005] A force measuring and calibration device for an axial locking member includes a force measuring and calibration device that bears the axial force of the locking member. The force measuring and calibration device includes a pressure-bearing part distributed along the axial direction of the locking member. The pressure-bearing part is provided with a force measuring component for detecting the axial force of the locking member and a calibration part for calibrating the measured value of the force measuring component.

[0006] In this scheme, a force measuring and calibration device is installed in the axial force direction of the locking component. The pressure-bearing part of the force measuring and calibration device is used to bear the axial force (preload) of the locking component. The magnitude of the preload is then detected by the force measuring component on the pressure-bearing part, which facilitates the judgment of whether the locking effect meets the requirements. After the test, the preload can be calibrated by the preload detected by the calibration unit to further determine whether the detected preload is accurate.

[0007] Optionally, the pressure-bearing part includes an upper plate and a lower plate, the force measuring assembly includes an elastomer and a force measuring element, the elastomer is disposed between the upper plate and the lower plate, the force measuring element is disposed on the side of the lower plate and the working end of the force measuring element is directly or indirectly attached to the side wall of the elastomer, and the calibration part is disposed on the lower plate.

[0008] Optionally, the top surface of the lower plate is provided with an annular assembly groove, the elastic body is located in the assembly groove, and the side wall of the assembly groove is provided with an installation hole for installing a force measuring element. The installation hole is connected to the assembly groove, and a force transmission pin is provided in the installation hole to transmit the pressure of the elastic body to the working end of the force measuring element.

[0009] Optionally, the elastomer is made of polyurethane or rubber.

[0010] Optionally, a second sealing ring is pressed between the upper plate and the lower plate.

[0011] Optionally, the calibration unit includes a sealed cavity, a calibration hole, and a first sealing plate. The first sealing plate is disposed on the bottom surface of the elastomer, and the first sealing plate and the lower plate form a sealed cavity. The calibration hole is opened on the lower plate and communicates with the sealed cavity.

[0012] Optionally, the elastomer is annular, with a first sealing ring embedded on both the inner and outer sides of the elastomer.

[0013] Optionally, a sealing bolt is threaded at the inlet of the calibration hole, and a second sealing plate is provided between the sealing bolt and the lower plate.

[0014] Optionally, the locking component includes a bolt and a nut, the bolt passes through the pressure bearing part and is threadedly connected to the nut, an upper pressure plate is provided above the pressure bearing part, a lower pressure plate is provided below the pressure bearing part, and a pad is provided between the lower pressure plate and the pressure bearing part.

[0015] The beneficial effects of this utility model are:

[0016] 1. Install a force measuring and calibration device in the axial force direction of the locking component. The pressure-bearing part of the force measuring and calibration device is used to bear the axial force (preload) of the locking component. The magnitude of the preload is then detected by the force measuring component on the pressure-bearing part, which makes it easier to judge whether the locking effect meets the requirements. After the test, the preload detected by the calibration unit can be used for calibration to further judge whether the detected preload is accurate.

[0017] 2. By injecting liquid into the calibration hole and observing the changes in liquid pressure and / or liquid volume until the set state is reached, the standard value of the preload of the bolt in the current state is obtained by calculating the force area in combination with hydraulic pressure, and then the measured value is calibrated. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure during calibration;

[0020] Figure 3 This is a schematic diagram of the assembly structure of the force measuring element and the pressure-bearing part.

[0021] Reference numerals: 1-Upper plate, 2-Lower plate, 3-Elastomer, 4-Force measuring element, 5-Force transmission pin, 6-Bolt, 7-Nut, 8-Upper clamping plate, 9-Lower clamping plate, 10-Pad, 11-First sealing plate, 12-Sealing cavity, 13-Assembly groove, 14-First sealing ring, 15-Second sealing ring, 16-Sealing bolt, 17-Second sealing plate, 18-Calibration hole, 19-Pressure bearing part. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] A force measuring and calibration device for an axial locking member includes a force measuring and calibration device that bears the axial force of the locking member. The force measuring and calibration device includes a pressure-bearing part 19 distributed along the axial direction of the locking member. The pressure-bearing part 19 is provided with a force measuring component for detecting the axial force of the locking member and a calibration part for calibrating the measured value of the force measuring component.

[0026] In this embodiment, as Figure 1 As shown, a force measuring and calibration device is installed in the axial force direction of the locking component. The pressure-bearing part 19 of the force measuring and calibration device is used to bear the axial force (preload) of the locking component. The magnitude of the preload is then detected by the force measuring component on the pressure-bearing part 19, which facilitates the judgment of whether the locking effect meets the requirements. After the test, the preload detected by the calibration unit can be calibrated to further determine whether the detected preload is accurate.

[0027] Furthermore, the pressure-bearing part 19 includes an upper plate 1 and a lower plate 2. The force measuring assembly includes an elastic body 3 and a force measuring element 4. The elastic body 3 is disposed between the upper plate 1 and the lower plate 2. The force measuring element 4 is disposed on the side of the lower plate 2 and the working end of the force measuring element 4 is directly or indirectly attached to the side wall of the elastic body 3. The calibration part is disposed on the lower plate 2.

[0028] Specifically, the elastic body 3 is pressed between the upper plate 1 and the lower plate 2. The axial force generated by the locking component locks the upper plate 1 and the lower plate 2. The axial force is transmitted to the elastic body 3. The force measuring element 4 (pressure sensor) senses the pressure of the elastic body 3, obtains the axial force of the locking component, and thus detects the axial force of the locking component, i.e., the preload. Figure 3 As shown, the force measuring element 4 is arranged in the circumference of the lower plate 2. One or more elements can be arranged. In this embodiment, two elements are arranged and symmetrically distributed on both sides of the lower plate 2.

[0029] Furthermore, the top surface of the lower plate 2 is provided with an annular assembly groove 13, the elastic body 3 is located in the assembly groove 13, and the side wall of the assembly groove 13 is provided with an installation hole for installing the force measuring element 4. The installation hole is connected to the assembly groove 13, and a force transmission pin 5 is provided in the installation hole to transmit the pressure of the elastic body 3 to the working end of the force measuring element 4.

[0030] Specifically, an annular assembly groove 13 is provided on the top surface of the lower plate 2. The elastic body 3 is installed in the assembly groove 13. The force measuring element 4 is installed on the side wall of the assembly groove 13. A force transmission pin 5 is provided between the working end of the force measuring element 4 and the side wall of the elastic body 3. The force transmission pin 5 transmits the pressure of the elastic body 3 to the working end of the force measuring element 4, thereby detecting the axial force of the locking component.

[0031] Furthermore, the elastomer 3 is made of polyurethane or rubber.

[0032] Furthermore, a second sealing ring 15 is pressed between the upper plate 1 and the lower plate 2.

[0033] Specifically, the second sealing ring 15 is used to seal the installation gap between the upper plate 1 and the lower plate 2, preventing foreign objects from entering the assembly groove 13, and also further preventing liquid from overflowing from the sealing cavity 12.

[0034] Furthermore, the calibration section includes a sealed cavity 12, a calibration hole 18, and a first sealing plate 11. The first sealing plate 11 is disposed on the bottom surface of the elastomer 3, and the first sealing plate 11 and the lower plate 2 form a sealed cavity 12. The calibration hole 18 is opened on the lower plate 2 and communicates with the sealed cavity 12.

[0035] Specifically, such as Figure 2As shown, the first sealing plate 11 is also annular, forming a sealing cavity 12 between the first sealing plate 11 and the lower plate 2, which is equivalent to forming a sealing cavity 12 between the first sealing plate 11 and the bottom wall of the assembly groove 13. A calibration hole 18 is opened on the side wall of the assembly groove 13, and the calibration hole 18 is connected to the sealing cavity 12. When it is necessary to calibrate the axial force being tested, liquid, generally hydraulic oil, is injected into the calibration hole 18. During the injection process, the pressure change and / or the liquid volume change are observed in real time. After being injected to the set state, the preload standard value of the locking component in the current state is calculated by combining hydraulic pressure with the force-bearing area of ​​the first sealing plate 11, and then the measured value is calibrated. The current state refers to the set state, which is the state in which the axial height of the locking component begins to change.

[0036] Furthermore, the elastic body 3 is annular, and a first sealing ring 14 is embedded on both the inner and outer sides of the elastic body 3.

[0037] Specifically, in order to fit the assembly groove 13, the elastomer 3 is also annular, and a first sealing ring 14 is embedded at the upper and lower ends of the inner and outer sides of the elastomer 3. The first sealing ring 14 can seal the installation gap between the elastomer 3 and the side wall of the assembly groove 13 to prevent liquid from overflowing from the sealing cavity 12.

[0038] Furthermore, a sealing bolt 16 is threadedly connected to the inlet of the calibration hole 18, and a second sealing plate 17 is provided between the sealing bolt 16 and the lower plate 2.

[0039] Specifically, the sealing bolt 16 is used to seal the calibration hole 18 when no liquid is needed, to prevent foreign matter from entering the calibration hole 18 and the sealing cavity 12, and to ensure the accuracy of subsequent calibration.

[0040] Furthermore, the locking component includes a bolt 6 and a nut 7. The bolt 6 passes through the pressure bearing part 19 and is threadedly connected to the nut 7. An upper pressure plate 8 is provided above the pressure bearing part 19, and a lower pressure plate 9 is provided below the pressure bearing part 19. A pad 10 is provided between the lower pressure plate 9 and the pressure bearing part 19.

[0041] Specifically, the locking components include bolt 6 and nut 7. Bolt 6 passes through upper clamping plate 8, upper plate 1, lower plate 2, pad 10, and lower clamping plate 9 from top to bottom. Nut 7 is then threaded onto bolt 6 that passes through from the bottom. Tightening nut 7 locks the force measuring and calibration device. Elastic body 3 is located outside bolt 6. Both upper plate 1 and lower plate 2 have through holes in the middle that allow bolt 6 to pass through. The through hole on lower plate 2 is not connected to the assembly groove 13. Assembly groove 13 is located outside the through hole.

[0042] In this embodiment,

[0043] The force measurement principle is as follows: after the bolt 6 is tightened, the pre-tightening force compresses the elastic body 3. The elastic body 3 is compressed, and the pressure sensor senses the pressure of the elastic body 3. In this way, the pressure sensor can measure the pre-tightening force of the bolt 6.

[0044] Calibration Principle: After force measurement, the accuracy of the preload detected by the pressure sensor needs to be calibrated. First, remove the sealing bolt 16 and the second sealing plate 17 from the lower plate 2. Connect the calibration hole 18 through the hydraulic pump and inject hydraulic oil into the calibration hole 18. The hydraulic oil enters the sealing cavity 12 through the calibration hole 18. The hydraulic oil generates hydraulic pressure in the sealing cavity 12. Observe the change of liquid pressure in real time. Stop injecting hydraulic oil when the axial height of bolt 6 begins to change. At this time, the liquid pressure in the sealing cavity 12 can be directly obtained. Combined with the force-bearing area of ​​the first sealing plate 11, calculate the preload of bolt 6 in the current state. The preload at this time is the standard value of the preload of bolt 6. The preload detected by the pressure sensor is calibrated using this standard value. If the error range is the same, the detected preload is judged to be correct; otherwise, the detected value is judged to be inaccurate, and the force measuring element 4 needs to be replaced or repaired.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A force measuring and calibration device for an axial locking component, characterized in that, It includes a force measuring and calibration device that bears the axial force of the locking member. The force measuring and calibration device includes a pressure bearing part (19) distributed along the axial direction of the locking member. The pressure bearing part (19) is provided with a force measuring component for detecting the axial force of the locking member and a calibration part for calibrating the measured value of the force measuring component.

2. The force measuring and calibration device for an axial locking component according to claim 1, characterized in that, The pressure-bearing part (19) includes an upper plate (1) and a lower plate (2). The force measuring assembly includes an elastic body (3) and a force measuring element (4). The elastic body (3) is disposed between the upper plate (1) and the lower plate (2). The force measuring element (4) is disposed on the side of the lower plate (2) and the working end of the force measuring element (4) is directly or indirectly attached to the side wall of the elastic body (3). The calibration part is disposed on the lower plate (2).

3. The force measuring and calibration device for an axial locking component according to claim 2, characterized in that, The lower plate (2) has an annular assembly groove (13) on its top surface. The elastic body (3) is located in the assembly groove (13). The side wall of the assembly groove (13) has an installation hole for installing the force measuring element (4). The installation hole is connected to the assembly groove (13). The installation hole has a force transmission pin (5) that transmits the pressure of the elastic body (3) to the working end of the force measuring element (4).

4. The force measuring and calibration device for an axial locking component according to claim 3, characterized in that, The elastomer (3) is made of polyurethane or rubber.

5. The force measuring and calibration device for an axial locking component according to claim 2, characterized in that, A second sealing ring (15) is pressed between the upper plate (1) and the lower plate (2).

6. The force measuring and calibration device for an axial locking component according to claim 2, characterized in that, The calibration section includes a sealed cavity (12), a calibration hole (18), and a first sealing plate (11). The first sealing plate (11) is disposed on the bottom surface of the elastomer (3). The first sealing plate (11) and the lower plate (2) form a sealed cavity (12). The calibration hole (18) is opened on the lower plate (2) and is connected to the sealed cavity (12).

7. The force measuring and calibration device for an axial locking component according to claim 6, characterized in that, The elastomer (3) is annular, and a first sealing ring (14) is embedded on both the inner and outer sides of the elastomer (3).

8. The force measuring and calibration device for an axial locking member according to claim 6, characterized in that, A plugging bolt (16) is threaded at the inlet of the calibration hole (18), and a second sealing plate (17) is provided between the plugging bolt (16) and the lower plate (2).

9. The force measuring and calibration device for an axial locking component according to claim 1, characterized in that, The locking component includes a bolt (6) and a nut (7). The bolt (6) passes through the pressure bearing part (19) and is threadedly connected to the nut (7). An upper pressure plate (8) is provided above the pressure bearing part (19), and a lower pressure plate (9) is provided below the pressure bearing part (19). A pad (10) is provided between the lower pressure plate (9) and the pressure bearing part (19).

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