Screw tension balancing device

Abstract

The utility model discloses a screw tension balancing device, which belongs to the technical field of sensors and comprises a push plate, a driving mechanism and a force sensor, one end of a screw is arranged on the slidable push plate, the other end of the screw is connected with the force sensor, and the driving mechanism is connected with the push plate and drives the push plate to apply pre-tightening force to the screw. And the force sensor tests and feeds back a tension value. According to the screw tension balancing device provided by the utility model, the assembly of the sensor can be realized, and accurate pre-tightening force can be applied to the sensitive core body in real time through the measurement of the force sensor in the assembly process, so that the consistency and the stability of the applied pre-tightening force in the assembly process of the sensitive core body are ensured; the assembly process efficiency is improved; and the assembly precision and the product stability are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration acceleration sensors, and particularly relates to a screw tension balancing device. Background Art

[0002] Vibration acceleration sensors are widely used in the industrial production field. They can be used to measure the vibration acceleration of mechanical equipment, monitor the operating state of machines, and achieve remote monitoring of equipment. The sensitive core of a vibration acceleration sensor is the core part of the sensor, which is responsible for sensing and converting mechanical vibration acceleration into an electrical signal. During the assembly process of the sensitive core in the shear form structure (a structural form that generates charges by applying a shear force to a piezoelectric material), a certain tensile force needs to be applied to the screw to achieve the purpose of the pre-tightening force of the sensitive core assembly component.

[0003] In the prior art, a certain tensile force is applied to the screw of the sensitive core by clamping it with a bench vice, and the operator rotates the handle of the bench vice to apply the pre-tightening force. This method has low working efficiency, and the value of the pre-tightening force is unstable, which cannot ensure the stability and consistency of the product, nor can it meet the requirements of process capability control during the production of batch products. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a screw tension balancing device that applies a tensile force to the screw according to the required pre-tightening force parameters, makes both ends of the screw in a balanced state, and reads the corresponding value at one end by a force sensor.

[0005] Technical Solution: To solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0006] A screw tension balancing device includes a push plate, a driving mechanism, and a force sensor. One end of the screw is arranged on the slidable push plate, and the other end is connected to the force sensor. The driving mechanism is connected to the push plate to drive the push plate to apply a pre-tightening force to the screw, and the force sensor tests and feeds back the tensile force value.

[0007] Further, the push plate is slidably arranged on the slide rail through a chute, and the movement directions of the slide rail and the chute are the same as the direction of applying the pre-tightening force to the screw.

[0008] Further, one end of the driving mechanism is connected to the push plate to drive the push plate to slide horizontally. The driving mechanism is a pneumatic driving mechanism, an electric push plate, or a hydraulic driving mechanism.

[0009] Further, detachable clamps are respectively arranged at both ends of the screw. One clamp is clamped on the push plate, and the other clamp is clamped on the force sensor.

[0010] Further, a connecting seat is provided on the force sensor, and the fixture is clamped on the connecting seat.

[0011] Further, a third groove body is provided at the upper end of the push plate for the fixture to be clamped.

[0012] Further, a limiting mechanism is provided at the rear side of the push plate.

[0013] Further, the limiting mechanism is a limit switch or a limit post.

[0014] Further, the pneumatic driving mechanism includes a cylinder, a connecting part connecting the piston rod of the cylinder and the push plate, and a pressure regulating valve for controlling the output of the cylinder.

[0015] Further, a base and a reinforcing rib are provided at the rear end of the push plate.

[0016] Beneficial effects: Compared with the prior art, the present utility model has the following advantages:

[0017] (1) For the screw tension balancing device of the present utility model, the screw is placed into the third groove body of the push plate through the fixture, the screw is stretched by the cylinder actuator, the corresponding tension value is fed back by the force sensor, the pressure regulating valve at the front end of the cylinder is adjusted to control the output force of the cylinder, and after setting the required tension, both ends of the screw are in a balanced state. This ensures the consistency and stability of the pre-tightening force applied during the assembly process of the sensitive core body; and improves the assembly process efficiency.

[0018] (2) The screw tension balancing device of the present utility model can not only realize the assembly of the sensor, but also, during the assembly process, through the measurement of the force sensor, accurately apply a pre-tightening force to the sensitive core body in real time, improving the assembly accuracy and the stability of the product. Description of the Drawings

[0019] Figure 1 is a schematic structural view of the screw tension balancing device Figure 1 .

[0020] Figure 2 is a schematic structural view of the screw tension balancing device Figure 2 . Detailed Embodiments

[0021] The following further clarifies the present utility model in conjunction with specific embodiments. The embodiments are implemented on the premise of the technical solution of the present utility model. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model.

[0022] Such as Figure 1-2As shown in the figure, the screw tension balance device of the present utility model includes a push plate 1, a base 2, a reinforcing rib 3, a chute 4, a slide rail 5, a driving mechanism 6, a force sensor 7, a screw 8, a fixture 9, a connecting seat 10, a third groove body 11, a limiting mechanism 12, an operating table 13, a supporting leg 14, etc. The operating table 13 is provided with 4 supporting legs 14, and a hole 15 is opened in the middle of the operating table for installing the push plate 1. The driving mechanism 6 is arranged below the operating table, and other components such as the base 2 of the push plate 1 and the force sensor 7 are arranged on the operating table.

[0023] The force sensor 7 is fixed on the operating table 13 through a support frame 15. The force sensor 7 is arranged opposite to the push plate 1, and the screw 8 is arranged between the push plate 1 and the force sensor 7; one end of the screw 8 is arranged on the slidable push plate 1, and the other end is connected to the force sensor 7. The driving mechanism 6 is connected to the push plate 1 to drive the push plate 1 to apply a pre-tightening force to the screw 8, and the force sensor 7 tests and feeds back the tension value.

[0024] A connecting seat 10 is arranged on the force sensor 7. A first groove body 101 is opened in the middle of the connecting seat 10, and a second groove body 102 is arranged at the front end of the connecting seat 10. The first groove body 101 and the second groove body 102 cooperate, so that the fixture of the screw 8 can be conveniently stuck in the connecting seat 10 and is easy to disassemble. There is a third groove body 11 arranged at the upper end of the push plate 1 for the fixture 9 to be clamped. The third groove body 11 is in a stepped shape and is adapted to the shape of the fixture 9 to clamp the fixture 9.

[0025] The push plate 1 is fixed on the base 2 through the reinforcing rib 3. The push plate 1, the base 2 and the reinforcing rib 3 can also adopt an integrally formed structure. Two groups of symmetric chutes 4 and slide rails 5 are arranged below the base 2. The push plate 1 is slidably arranged on the slide rail 5 through the chute 4, and the movement directions of the slide rail 5 and the chute 4 are consistent with the pre-tightening force application direction of the screw 8. Under the action of the driving mechanism 6, the entire push plate 1 and the base 2 can slide horizontally.

[0026] In this embodiment, the push plate 1 is arranged vertically and penetrates through the hole 15. Part of it is located above the operating table 13, and part of it is located below the operating table 13. The lower end of the push plate 1 is connected to the driving mechanism 6. The driving mechanism can be arranged below the operating table 13 without occupying the space above the operating table 13. The push plate 1 is slidably arranged on the slide rail 5 through the slider 4, and the movement direction of the slider 4 is consistent with the pre-tightening force application direction of the screw 8.

[0027] The driving mechanism 6 is a pneumatic driving mechanism, an electric push plate or a hydraulic driving mechanism. In this embodiment, the driving mechanism adopts a pneumatic driving mechanism. The pneumatic driving mechanism 6 includes a cylinder 61, a connecting part 62 connecting the piston rod of the cylinder 61 and the push plate 1, and a pressure regulating valve 64 for controlling the output of the cylinder 61. The pressure regulating valve 64 can adjust the force output by the cylinder. The pneumatic driving mechanism has precise control, is convenient to adjust and is easy to use.

[0028] Removable clamps 9 are respectively arranged at both ends of the screw rod 8. One clamp 9 is clamped on the push plate 1, and the other clamp 9 is clamped on the force sensor 7.

[0029] A limiting mechanism 12 is arranged at the rear side of the push plate 1. The limiting mechanism 12 is a limit switch or a limit post. The limit post is for mechanical limitation, and a limit switch is preferably adopted. The limit switch is linked with the driving mechanism and the force sensor 7 for control. When the driving mechanism 6 drives the push plate 1 to pull the screw rod to a preset tensile force or the push plate 1 slides to the limit switch, the driving mechanism 6 stops operating.

[0030] The working principle of the present utility model: During the installation process of the pneumatic sensor, first place the screw rod 8 into the clamps 9 at both ends. Place one clamp 9 into the third groove 11 of the push plate 1, and place the other clamp 9 into the connecting seat 10. Start the actuator of the air cylinder to stretch the screw rod 8, and the force sensor 7 feeds back the corresponding tensile force value. During the process of the air cylinder 61 performing stretching, the pressure regulating valve 64 at the front end of the air cylinder 61 can be adjusted to control the output force of the air cylinder 61. After reaching the set required tensile force, both ends of the screw rod 8 are in a balanced state, and then the next installation step of the sensor can be carried out.

[0031] The above is only the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A screw tension balancing device, characterized in that: The invention comprises a push plate (1), a driving mechanism (6) and a force sensor (7); one end of a screw rod (8) is arranged on a slidable push plate (1), and the other end is connected to the force sensor (7); the driving mechanism (6) is connected to the push plate (1) to drive the push plate (1) to apply a pre-tightening force to the screw rod (8); and the force sensor (7) tests and feeds back a tension value.

2. The screw tension balancing device according to claim 1, characterized in that: The push plate (1) is slidably arranged on the slide rail (5) via a slider (4), and the movement direction of the slider (4) is consistent with the direction in which the pre-tightening force of the screw rod (8) is applied.

3. The screw tension balancing device according to claim 1 or 2, characterized in that: The driving mechanism (6) is connected to one end of the push plate (1) to drive the push plate (1) to slide in a horizontal direction. The driving mechanism (6) is a pneumatic driving mechanism, an electric push plate or a hydraulic driving mechanism.

4. The screw tension balancing device according to claim 2, characterized in that: Removable clamps (9) are respectively provided at both ends of the screw rod (8), one clamp (9) is clamped on the push plate (1), and the other clamp (9) is clamped on the force sensor (7).

5. The screw tension balancing device according to claim 4, characterized in that: A connecting seat (10) is provided on the force sensor (7), and the clamp (9) is clamped on the connecting seat (10).

6. The screw tension balancing device according to claim 1, characterized in that: A third groove (11) is provided at the upper end of the push plate (1) for the clamp (9) to be clamped.

7. The screw tension balancing device according to claim 1, characterized in that: A limiting mechanism (12) is arranged on the rear side of the push plate (1).

8. The screw tension balancing device according to claim 7, characterized in that: The limit mechanism (12) is a limit switch or a limit column.

9. The screw tension balancing device according to claim 3, characterized in that: The pneumatic drive mechanism (6) comprises a cylinder (61), a connecting portion (62) connecting a piston rod of the cylinder (61) and a push plate (1), and a pressure regulating valve (64) for controlling the output of the cylinder (61).

10. The screw tension balancing device according to claim 1, characterized in that: A base (2) and a reinforcing rib (3) are provided at the rear end of the push plate (1).

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