Double-cantilever type high-precision force measurement sensing device

Abstract

The utility model discloses a double-cantilever type high-precision force measurement sensing device which comprises a base, a groove is formed in the middle of the base, and an elastic body is fixed in the groove; the elastic body comprises a fixed table, the fixed table is fixed in the groove, cantilever beams which are symmetrically distributed left and right are arranged on the side edge of the fixed table in an extending mode, and the bottom of the fixed table protrudes downwards relative to the cantilever beams. The sensor has the advantages that the weighing platform area of the sensor can be increased through the bilaterally symmetrically distributed double-cantilever beam structure, the eccentric influence of the sensor caused by different detection positions is reduced, and the sensor can meet many high-precision force measurement scenes.

Description

Technical Field

[0001] The utility model relates to a double-cantilever high-precision force measuring sensor device, belonging to the technical scope of resistance strain force sensors. Background Art

[0002] A pressure sensor is a device or apparatus that can sense a pressure signal and convert the pressure signal into an available output electrical signal according to a certain rule. A pressure sensor usually consists of a pressure-sensitive element and a signal processing unit. A pressure sensor is one of the most commonly used sensors in industrial practice and is widely used in various industrial automatic control environments. Conventional pressure sensors generally have a certain eccentric error and relatively low accuracy. Therefore, we designed this double-cantilever high-precision force sensor to solve the above problems. Content of the Utility Model

[0003] In order to reduce the offset error due to the force application point and improve the detection accuracy of the sensor, this application provides a double-cantilever high-precision force measuring sensor device. Through the double-cantilever beam structure symmetrically distributed on the left and right, it can increase the weighing platform area of the sensor, reduce the eccentric influence caused by different detection positions of the sensor, and can meet many high-precision force measurement scenarios.

[0004] A double-cantilever high-precision force measuring sensor device provided by this application adopts the following technical solutions:

[0005] A double-cantilever high-precision force measuring sensor device includes a base. There is a groove in the middle of the base, and an elastic body is fixed in the groove.

[0006] The elastic body includes a fixed platform. The fixed platform is fixed in the groove. There are symmetrically distributed cantilever beams extending from the side of the fixed platform. The bottom of the fixed platform protrudes downward relative to the cantilever beams.

[0007] Further, a cross beam is connected to the end of the cantilever beam far from the fixed platform, and a loading platform extends inward in the middle of the cross beam in the reverse direction.

[0008] Further, the cantilever beams are symmetrically distributed on both sides of the loading platform, and there are gaps between the loading platform and the cantilever beams on both sides.

[0009] Further, there are waist-shaped holes on the cantilever beams, dividing the cantilever beams into upper and lower parts to form a parallel beam structure.

[0010] Further, a double-hole is connected to each side of the waist-shaped hole.

[0011] Further, there are connecting holes on the loading platform, and the loading platform adopts connecting holes to be hollowed out to reduce weight.

[0012] Further, one end of the groove is provided with a wire outlet, and the signal lead wire of the sensor passes through the wire outlet.

[0013] Further, a #1 mounting hole is provided at the end of the groove near the wire outlet, and a #4 mounting hole is provided at the corresponding position on the top of the fixing table and the base. The fixing table is fixed in the groove through the #1 mounting hole and the #4 mounting hole.

[0014] Further, a wire outlet hole is provided in the middle of the rear side of the #4 mounting hole for leading out the signal lead wire of the sensor.

[0015] Further, one #2 mounting hole and one #3 mounting hole are provided at each of the four corners of the top of the base. The #2 mounting hole is used to fix the base to the operating machine table, and the #3 mounting hole is used to fix the fixture.

[0016] The present utility model adopts the above technical solutions. Compared with the prior art, it has the following technical effects:

[0017] Through the double cantilever beam structure symmetrically distributed left and right, it is possible to increase the weighing platform area of the sensor, reduce the eccentric influence caused by different detection positions of the sensor, and at the same time, there is a device for mechanical overload protection between the elastic body and the base, which can protect the sensor from being damaged due to overpressure. At the same time, this double cantilever beam structure is simple and convenient for patchwork, with high precision, and can meet many high-precision force measurement scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0019] Figure 1 It is a schematic structural diagram of a double-cantilever high-precision force-sensing device in the present utility model;

[0020] Figure 2 It is a schematic structural diagram of the base in the present utility model;

[0021] Figures 3 to 5 It is a schematic structural diagram of the elastic body in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Example 1, as Figures 1 to 5As shown in the figure, a double-cantilever high-precision force-sensing device includes a base 2. The base 2 is a cuboid. A square groove 2-3 is provided in the middle of the base 2. The groove 2-3 is used to fix the elastic body 3. An outlet 2-5 is provided at one end of the groove 2-3. The signal lead wire 1 of the sensor passes through the outlet 2-5. A No. 1 mounting hole 2-4 is provided near the outlet 2-5 end in the groove 2-3. The No. 1 mounting hole 2-4 is used to fix the elastic body 3 on the base 2.

[0023] At each of the four corners of the top of the base 2, there is a No. 2 mounting hole 2-1 and a No. 3 mounting hole 2-2. The No. 2 mounting hole 2-1 is used to fix the base to the working machine table, and the No. 3 mounting hole 2-2 is used to fix other fixtures.

[0024] The elastic body 3 includes a fixed platform 3-1. The fixed platform 3-1 is fixed in the No. 1 mounting hole 2-4 by bolts. Two cantilever beams 3-7 are symmetrically distributed on the left and right sides and extend from the side of the fixed platform 3-1. The bottom of the fixed platform 3-1 protrudes downward relative to the cantilever beams 3-7. A cross beam 3-9 is connected to the end of the cantilever beam 3-7 far from the fixed platform 3-1. A loading platform 3-5 extends reversely and inwardly in the middle of the cross beam 3-9. There is a gap 3-6 between the loading platform 3-5 and the two cantilever beams 3-7 on both sides. The cantilever beams 3-7 are symmetrically distributed on both sides of the loading platform 3-5.

[0025] A waist-shaped hole 3-4 is provided on the cantilever beam 3-7, which divides the cantilever beam 3-7 into upper and lower parts, that is, a parallel beam structure. A double-hole 3-10 is communicated with each side of the waist-shaped hole 3-4.

[0026] The loading platform 3-5 is hollowed out by connecting holes 3-8 to reduce weight.

[0027] At the corresponding position on the top of the fixed platform 3-1 and the base 2, there is a No. 4 mounting hole 3-3 for fixing the elastic body. The fixed platform 3-1 is fixed in the groove 2-3 by bolts passing through the No. 1 mounting hole 2-4 and the No. 4 mounting hole 3-3. A wire outlet hole 3-2 is provided in the middle of the rear side of the No. 4 mounting hole 3-3 for leading out the signal lead wire 1 of the sensor.

[0028] Force analysis

[0029] When a battery or other materials are placed in the fixed loading area on the loading platform 3-5, their weights will act evenly on the two cantilever beams 3-7 on both sides;

[0030] Since the cantilever beams 3-7 are parallel beam structures and symmetrically distributed on both sides of the central loading platform 3-5, and due to the anti-offloading characteristics of the parallel beams themselves, the influence of the offset of the material placement on the weighing accuracy can be reduced. At the same time, we can perform four-corner correction by using the corresponding edge positions of the double-connected holes 3-10 of the corresponding double beams, which can well adjust the influence of the loading deviation from the center on the output accuracy. Therefore, as long as the material is placed within the specified range, the weighing accuracy will not be affected.

[0031] The description of the present invention is given for purposes of illustration and description, and is not intended to be exhaustive or to limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A double cantilever beam high-precision force sensing device, characterized in that: It comprises a base (2), a groove (2-3) is provided in the middle of the base (2), and an elastic body (3) is fixed in the groove (2-3); The elastic body (3) comprises a fixing platform (3-1), the fixing platform (3-1) is fixed in the groove (2-3), a cantilever beam (3-7) symmetrically distributed on the left and right sides of the fixing platform (3-1) is extended, and the bottom of the fixing platform (3-1) is protruding downward relative to the cantilever beam (3-7).

2. A double cantilever beam high-precision force sensor device as claimed in claim 1, characterized in that: The cantilever beam (3-7) is connected to a crossbeam (3-9) at one end away from the fixed platform (3-1), and a loading platform (3-5) is provided in the middle of the crossbeam (3-9) extending inward in the opposite direction.

3. A double cantilever beam high-precision force sensor device as claimed in claim 2, characterized in that: The cantilever beams (3-7) are symmetrically distributed on both sides of the loading platform (3-5), and gaps (3-6) are provided between the loading platform (3-5) and the cantilever beams (3-7) on both sides.

4. A double cantilever beam high-precision force sensor device as claimed in claim 1, characterized in that: The cantilever beam (3-7) is provided with a waist-shaped hole (3-4), which divides the cantilever beam (3-7) into two parts, an upper part and a lower part, to form a parallel beam structure.

5. A double cantilever beam high-precision force sensor device as claimed in claim 4, characterized in that: Both sides of the waist-shaped hole (3-4) are connected with a double connecting hole (3-10).

6. A double cantilever beam high-precision force sensor device as claimed in claim 2, characterized in that: The loading platform (3-5) is provided with a connecting hole (3-8), and the loading platform (3-5) is hollowed out using the connecting hole (3-8) to reduce weight.

7. A double cantilever beam high-precision force sensor device as claimed in claim 1, characterized in that: One end of the groove (2-3) is provided with a wire outlet (2-5), and the signal lead wire (1) of the sensor passes through the wire outlet (2-5).

8. A double cantilever beam high-precision force sensor device as claimed in claim 7, characterized in that: A 1# mounting hole (2-4) is provided in the groove (2-3) near the end of the outlet (2-5), a 4# mounting hole (3-3) is provided at a corresponding position on the top of the fixing platform (3-1) and the base (2), and the fixing platform (3-1) is fixed in the groove (2-3) through the 1# mounting hole (2-4) and the 4# mounting hole (3-3).

9. A double cantilever beam high-precision force sensor device as claimed in claim 8, characterized in that: A wire outlet hole (3-2) is provided in the middle of the rear side of the 4# mounting hole (3-3) for leading out a signal lead wire (1) of the sensor.

10. The double cantilever beam high-precision force sensor device according to claim 1, characterized in that: A 2# mounting hole (2-1) and a 3# mounting hole (2-2) are respectively arranged at the four corners of the top of the base (2); the 2# mounting hole (2-1) is used to fix the base to the machine platform, and the 3# mounting hole (2-2) is used to fix the fixture.

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