A bidirectional compression-tension force sensor

Abstract

The utility model discloses a kind of bidirectional compression and tension force sensor, including elastomer, the elastomer includes fixed part and stress part fixedly arranged on the fixed part, recessed with containing groove on the fixed part, electronic circuit board is fixedly arranged in the containing groove, strain area is recessed symmetrically in the stress part two sides, at least two strain gauges are pasted in the strain area, electric connection between the electronic circuit board and the strain gauge, the utility model realizes the effect that the stress part bidirectional of force sensor can be tensioned and compressed measurement by setting strain area symmetrically in stress part two sides, setting strain gauge in two sides strain area.

Description

Technical Field

[0001] This utility model relates to the field of industrial force measurement technology, and in particular to a force sensor capable of bidirectional compression and tension. Background Technology

[0002] Force sensors are a core component of industrial force measurement. Their technological development stems from the need for high-precision force measurement. Most force sensors on the market use a Wheatstone bridge circuit composed of multiple strain gauges on one side of the sensor to convert the resistance change of the strain gauges into an observable electrical signal, thus achieving force-to-electricity conversion. However, when the user applies force to the other side where no strain gauges are installed, the force sensor cannot accurately measure the force.

[0003] For the reasons mentioned above, it is necessary to improve the existing technology. Utility Model Content

[0004] I. Technical problems to be solved This invention addresses the aforementioned deficiencies in the existing technology by proposing a bidirectional compressive and tensile force sensor to solve the problems mentioned in the background section.

[0005] II. Technical Solution To solve the above-mentioned technical problems, this utility model provides a bidirectional compressive and tensile force sensor, including an elastic body. The elastic body includes a fixing part and a force-receiving part fixedly disposed on the fixing part. The fixing part is recessed with a receiving groove, and an electronic circuit board is fixedly disposed in the receiving groove. The force-receiving part is symmetrically recessed with strain zones on both sides, and at least two strain gauges are attached to the strain zones. The electronic circuit board is electrically connected to the strain gauges.

[0006] In the above technical solution, a circular groove is provided on one side of the fixing part, and a first circuit channel is opened between the circular groove and the receiving groove. A cable is fixedly installed in the circular groove, and the end of the cable passes through the circuit channel and is electrically connected to the electronic circuit board.

[0007] In the above technical solution, the two ends of the fixing part extend outward to form sidewalls, the fixing part is U-shaped, and the force-bearing part is fixedly disposed at the opening in the middle of the fixing part.

[0008] In the above technical solution, the force-bearing part and the fixing part are integrally formed.

[0009] In the above technical solution, a gap is provided between the force-bearing part and the side, and an arc-shaped part is provided at the end of the gap.

[0010] In the above technical solution, threaded holes for fixing are provided at both ends of the side.

[0011] In the above technical solution, the end of the force-bearing part is provided with a bidirectional nut hole.

[0012] In the above technical solution, a rubber protective sheet is fixedly provided on the strain zone, and the upper surface of the rubber protective sheet is flush with the upper end surface of the strain zone.

[0013] In the above technical solution, the upper surface of the receiving groove is covered with a receiving cover that completely isolates the inner cavity of the receiving groove from the outside world.

[0014] III. Beneficial Effects Compared with the prior art, the present invention has the following advantages: the present invention achieves the effect of bidirectional tension and compression measurement of the force sensor by symmetrically setting strain zones on both sides of the force-bearing part and setting strain gauges in the strain zones on both sides. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the three-dimensional structure of this utility model.

[0016] Figure 2 This is a rear view schematic diagram of the three-dimensional structure of this utility model.

[0017] Figure 3 This is an exploded structural diagram of the present invention.

[0018] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0019] In the diagram: 1 is the elastic body, 100 is the gap, 101 is the arc part, 2 is the fixing part, 20 is the circular groove, 21 is the circuit channel, 22 is the side, 3 is the force-bearing part, 30 is the strain zone, 31 is the strain gauge, 32 is the threaded hole, 33 is the nut hole, 4 is the receiving groove, 40 is the receiving cover, 5 is the electronic circuit board, 6 is the cable, and 7 is the rubber protective sheet. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] Please see Figure 1-4 This utility model provides a bidirectional compressive and tensile force sensor, including an elastic body 1. The elastic body 1 includes a fixing part 2 and a force-receiving part 3 fixedly disposed on the fixing part 2. The fixing part 2 is recessed with a receiving groove 4, and an electronic circuit board 5 is fixedly disposed in the receiving groove 4. The force-receiving part 3 is symmetrically recessed with strain zones 30 on both sides, and at least two strain gauges 31 are attached in the strain zones 30. The electronic circuit board 5 is electrically connected to the strain gauges 31.

[0022] In the above structure, the fixing part is used to fix the elastomer at the user-specified position, and the two sides of the force-bearing part are recessed inward to form two symmetrical strain zones. Each strain zone is fitted with a material such as... Figure 3 The four strain gauges arranged in the middle form a Wheatstone bridge. The strain gauges are electrically connected to the electronic circuit board. When the force sensor is used, the external pressure or tension applied to either side of the force-bearing part causes deformation of the force-bearing part. The strain zone deforms synchronously, and the resistance value of the strain gauges set in the strain zone changes with the deformation. The change in resistance disrupts the balance of the bridge and generates an electrical signal proportional to the applied pressure or tension, which is output to the electronic circuit board. The whole system enables the force sensor to perform tension and compression measurements in both directions.

[0023] Specifically, a circular groove 20 is provided on one side of the fixing part 2, and a first circuit channel 21 is opened between the circular groove 20 and the receiving groove 4. A cable 6 is fixedly installed in the circular groove 20, and the end of the cable 6 passes through the circuit channel 21 and is electrically connected to the electronic circuit board 5. Placing the cable in the circular groove can effectively protect the cable from external damage that would render the force sensor unusable.

[0024] Specifically, the fixing part 2 extends outward at both ends to form side edges 22. The fixing part 2 is U-shaped, and the force-bearing part 3 is fixedly disposed at the opening in the middle of the fixing part 2. The U-shaped fixing part can better distribute and bear the load, and reduce unnecessary vibration and deformation caused by the force when the fixing part is fixed.

[0025] Specifically, the force-bearing part 3 and the fixing part 2 are integrally formed, which reduces the connection error between the force-bearing part and the fixing part and improves the vibration resistance.

[0026] Specifically, a gap 100 is provided between the force-bearing part 3 and the side 22, and an arc part 101 is provided at the end of the gap 100. The arc curve of the arc part replaces the right angle, which effectively eliminates stress concentration and reduces the occurrence of fatigue fracture of the elastomer.

[0027] Specifically, threaded holes 32 for fixing are provided at both ends of the side 22, making the overall fixing method more stable.

[0028] Specifically, the force-bearing part 3 has a bidirectional nut hole 33 at its end, which can be connected to a screw to form a bidirectional compressible and tensile structure.

[0029] Specifically, a rubber protective sheet 7 is fixedly provided on the strain zone 30, and the upper surface of the rubber protective sheet 7 is flush with the upper end face of the strain zone 30. The rubber protective sheet effectively protects the strain gauge from damage by external factors. The fact that the upper surface of the rubber protective sheet is flush with the upper end face of the strain zone makes the force sensor visually unobtrusive and increases its aesthetics.

[0030] Specifically, the upper surface of the receiving groove 4 is covered with a receiving cover 40 that completely isolates the inner cavity of the receiving groove 4 from the outside world. The receiving cover is used to protect the electronic circuit board installed inside the receiving groove from damage by external factors.

[0031] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A bidirectional compressive-tensile force sensor, characterized in that, The device includes an elastomer (1), which includes a fixing part (2) and a force-receiving part (3) fixedly disposed on the fixing part (2). The fixing part (2) is recessed with a receiving groove (4), and an electronic circuit board (5) is fixedly disposed in the receiving groove (4). The force-receiving part (3) is symmetrically recessed with strain zones (30) on both sides, and at least two strain gauges (31) are attached in the strain zones (30). The electronic circuit board (5) is electrically connected to the strain gauges (31).

2. The force sensor capable of bidirectional compression and tension as described in claim 1, characterized in that: A circular groove (20) is provided on one side of the fixing part (2). A first circuit channel (21) is opened between the circular groove (20) and the receiving groove (4). A cable (6) is fixedly installed in the circular groove (20). The end of the cable (6) passes through the circuit channel (21) and is electrically connected to the electronic circuit board (5).

3. The force sensor capable of bidirectional compression and tension as described in claim 1, characterized in that: The fixing part (2) extends outward at both ends to form sidewalls (22). The fixing part (2) is U-shaped, and the force-bearing part (3) is fixedly installed at the opening in the middle of the fixing part (2).

4. A bidirectional compressive-tensile force sensor as described in claim 3, characterized in that: The force-bearing part (3) and the fixing part (2) are integrally formed.

5. A bidirectional compressive-tensile force sensor as described in claim 3, characterized in that: A gap (100) is provided between the force-bearing part (3) and the side (22), and an arc part (101) is provided at the end of the gap (100).

6. A bidirectional compressive-tensile force sensor as described in claim 3, characterized in that: The two ends of the side (22) are provided with threaded holes (32) for fixing.

7. A bidirectional compressive-tensile force sensor as described in claim 1, characterized in that: The end of the force-bearing part (3) is provided with a bidirectional nut hole (33).

8. A bidirectional compressive-tensile force sensor as described in claim 1, characterized in that: A rubber protective sheet (7) is fixedly provided on the strain zone (30), and the upper surface of the rubber protective sheet (7) is flush with the upper end face of the strain zone (30).

9. A bidirectional compressive-tensile force sensor as described in claim 1, characterized in that: The upper surface of the receiving groove (4) is covered with a receiving cover (40) that completely isolates the inner cavity of the receiving groove (4) from the outside world.

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