High-precision force transducer with protection effect

Abstract

The utility model discloses a high-precision force transducer with a protection effect, which relates to the technical field of force transducers and comprises a protection shell and an inner ring frame, a force transducer body is arranged at the middle end inside the protection shell and is electrically connected with a cable, the inner ring frame is arranged above the inside of the protection shell, and the inner ring frame is electrically connected with the cable. A limiting groove is formed in the inner surface of the inner ring frame, a limiting pin is arranged in the limiting groove in a sliding mode, a rubbing wheel is fixed to the end of the limiting pin, an arc-shaped sliding groove is formed in the surface of the rubbing wheel, and a sliding pin is arranged in the arc-shaped sliding groove in a penetrating mode. According to the high-precision force transducer with the protection effect, the force transducer body is clamped by the four clamping rollers, when the force transducer body is impacted by external force, the swing arm slides in the sliding seat, and the impact force is absorbed by the damping shock absorber, so that the displacement of the force transducer body is reduced, and the reliability of the force transducer body is improved. And the safety and the measurement precision of the force transducer body are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of force measuring sensors, in particular to a high-precision force measuring sensor with a protective effect. Background Art

[0002] The force sensor is used to measure the magnitude of the applied force. It consists of three major parts: one or more elastic bodies that can deform after being subjected to force, a bridge circuit (such as a Wheatstone bridge) composed of a resistance strain gauge that can sense the deformation, an adhesive that can fix the resistance strain gauge on the elastic body and conduct the strain, and a sealant that protects the electronic circuit.

[0003] For example, the utility model with application number CN202221138514.X discloses a force sensor with overload protection function. The utility model places the force sensor body into the connecting groove, fixes the position of the force sensor body by a fixing mechanism, and protects the force sensor body by a protective cover to prevent it from being damaged by collision. When testing, the lifting column will move downward along the lifting groove and squeeze the spring. When the force sensor body is about to be overloaded, the bottom of the lifting column contacts the protective rod to prevent the force sensor body from being overloaded. However, after long-term use, dust is easily accumulated on the internal surface of the force sensor body, which will affect the measurement accuracy.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a high-precision force sensor with protective effect is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a high-precision force sensor with a protective effect to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision force sensor with a protective effect, comprising a protective shell and an inner ring frame, a force sensor body is arranged at the inner middle end of the protective shell, and the force sensor body is electrically connected to a cable, the inner ring frame is arranged above the inner part of the protective shell, and a limiting groove is provided on the inner surface of the inner ring frame, a limiting pin is slidably provided in the limiting groove, and a rubbing wheel is fixed to the end of the limiting pin, an arc-shaped sliding groove is provided on the surface of the rubbing wheel, and a sliding pin is passed through the arc-shaped sliding groove, and a movable shell cover is fixed to the bottom end of the sliding pin.

[0007] Furthermore, a positioning assembly is installed on the inner bottom surface of the protective shell, and four groups of positioning assemblies are provided.

[0008] Furthermore, the positioning assembly includes a swing arm, a clamping roller and a sliding seat, and the end of the swing arm is connected to the clamping roller via a rotating shaft, and the sliding seat is sleeved on the outside of the swing arm.

[0009] Furthermore, the positioning assembly also includes a damping shock absorber and a connecting seat, and the damping shock absorber is arranged outside the sliding seat, and the connecting seat is installed at the other end of the damping shock absorber.

[0010] Furthermore, one end of the swing arm away from the clamping roller is rotatably connected to the protective shell via a rotating shaft, and the middle part of the connecting seat is rotatably connected to the protective shell via a rotating shaft.

[0011] Furthermore, the clamping rollers are distributed in a circular shape and at equal intervals along the outer side of the force sensor body, and the clamping rollers and the force sensor body are tightly fitted.

[0012] Furthermore, the limit pin is in an L-shaped structure, and two limit pins are symmetrically arranged about the center position of the rubbing wheel.

[0013] Furthermore, the movable shell cover penetrates through the through grooves on the front and rear surfaces of the protective shell, and the number of the sliding pins and the movable shell cover is the same.

[0014] The utility model provides a high-precision force sensor with protective effect, which has the following beneficial effects:

[0015] 1. The utility model can make the limit pin slide along the limit groove on the inner surface of the inner ring frame by rotating the rubbing wheel counterclockwise, and cause the sliding pin in the arc-shaped sliding groove to drive the movable shell cover to move in the opposite direction, thereby sealing the opening in the middle of the rubbing wheel to prevent the force sensor body from being contaminated by the external environment.

[0016] 2. The four clamping rollers of the utility model clamp the force sensor body. When the force sensor body is impacted by external force, the swing arm will slide in the sliding seat, and the impact force will be absorbed by the damping shock absorber, thereby reducing the displacement of the force sensor body and ensuring the safety and measurement accuracy of the force sensor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a high-precision force sensor with a protective effect according to the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of a protective shell of a high-precision force sensor with protective effect according to the utility model;

[0019] Figure 3 The utility model is a schematic diagram of the inner ring frame and the rubbing wheel of a high-precision force sensor with a protective effect when viewed from above.

[0020] In the figure: 1. Protective shell; 2. Positioning assembly; 201. Swing arm; 202. Clamping roller; 203. Sliding seat; 204. Damping shock absorber; 205. Connecting seat; 3. Force sensor body; 4. Cable; 5. Inner ring frame; 6. Limiting groove; 7. Limiting pin; 8. Rubbing wheel; 9. Arc-shaped slide groove; 10. Sliding pin; 11. Movable shell cover. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] like Figure 1 and Figure 3 As shown, a high-precision force sensor with a protective effect includes a protective shell 1 and an inner ring frame 5. A force sensor body 3 is arranged at the middle end of the inner part of the protective shell 1, and the force sensor body 3 is electrically connected to a cable 4. The inner ring frame 5 is arranged above the inner part of the protective shell 1, and a limiting groove 6 is provided on the inner surface of the inner ring frame 5. A limiting pin 7 is slidably arranged in the limiting groove 6, and a rubbing wheel 8 is fixed to the end of the limiting pin 7. An arc-shaped sliding groove 9 is provided on the surface of the rubbing wheel 8, and a sliding pin 10 is passed through the arc-shaped sliding groove 9. A movable shell cover 11 is fixed to the bottom end of the sliding pin 10. The limiting pin 7 is an L-shaped structure, and two limiting pins 7 are symmetrically arranged about the center position of the rubbing wheel 8. The movable shell cover 11 passes through the through grooves on the front and rear surfaces of the protective shell 1, and the sliding pins 10 and the movable shell cover 11 are arranged in the same number.

[0023] The specific operation is as follows: by rotating the rubbing wheel 8 counterclockwise, the limit pin 7 can slide along the limit groove 6 on the inner surface of the inner ring frame 5, and cause the sliding pin 10 in the arc-shaped slide groove 9 to drive the movable shell cover 11 to move in the opposite direction, thereby sealing the opening in the middle of the rubbing wheel 8 to prevent the force sensor body 3 from being contaminated by the external environment.

[0024] like Figure 2 As shown, a positioning assembly 2 is installed on the inner bottom surface of the protective shell 1, and the positioning assembly 2 is provided with four groups. The positioning assembly 2 includes a swing arm 201, a clamping roller 202 and a sliding seat 203, and the end of the swing arm 201 is connected to the clamping roller 202 through a rotating shaft, and the sliding seat 203 is sleeved on the outside of the swing arm 201. The positioning assembly 2 also includes a damping shock absorber 204 and a connecting seat 205, and the damping shock absorber 204 is provided on the outside of the sliding seat 203, and the other end of the damping shock absorber 204 is installed with a connecting seat 205. The end of the swing arm 201 away from the clamping roller 202 is rotatably connected to the protective shell 1 through a rotating shaft, and the middle part of the connecting seat 205 is rotatably connected to the protective shell 1 through a rotating shaft. The clamping rollers 202 are distributed in a circular shape and are equidistant along the outer side of the force sensor body 3, and the clamping rollers 202 and the force sensor body 3 fit tightly.

[0025] The specific operation is as follows: the four clamping rollers 202 clamp the force sensor body 3. When the force sensor body 3 is impacted by external force, the swing arm 201 will slide in the sliding seat 203, and the impact force will be absorbed by the damping shock absorber 204, thereby reducing the displacement of the force sensor body 3 and ensuring the safety and measurement accuracy of the force sensor body 3.

[0026] In summary, when the high-precision force sensor with a protective effect is used, first, the force sensor body 3 is centrally placed inside the protective shell 1, and the force sensor body 3 is clamped by four clamping rollers 202, so that when the force sensor body 3 is impacted by an external force, the swing arm 201 is caused to slide in the sliding seat 203, and the impact force is absorbed by the damping shock absorber 204 at this time, reducing the displacement of the force sensor body 3, ensuring the safety of the force sensor body 3, avoiding hard collision with the protective shell 1 to cause damage to the force sensor body 3, and ensuring the accuracy of the measurement result;

[0027] When testing, the rubbing wheel 8 is rotated clockwise to make the limit pin 7 slide along the limit groove 6 on the inner surface of the inner ring frame 5, and cause the sliding pin 10 in the arc-shaped slide groove 9 to drive the movable shell cover 11 to move in the opposite direction, so that the movable shell cover 11 protrudes from the through grooves on the front and rear surfaces of the protective shell 1, exposing the opening in the middle of the rubbing wheel 8, so that the object to be tested is conveniently placed on the force sensor body 3;

[0028] When the measurement is finished, remove the object and rotate the rubbing wheel 8 counterclockwise to make the limit pin 7 slide along the limit groove 6 on the inner surface of the inner ring frame 5, and cause the sliding pin 10 in the arc-shaped slide groove 9 to drive the movable shell cover 11 to move in the opposite direction until the opening in the middle of the rubbing wheel 8 is sealed, preventing foreign particles and dust from entering the protective shell 1, thereby protecting the force sensor body 3.

[0029] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A high-precision force sensor with a protective effect, comprising a protective housing (1) and an inner ring frame (5), characterized in that: A force sensor body (3) is arranged at the middle end of the interior of the protective shell (1), and the force sensor body (3) is electrically connected to a cable (4); the inner ring frame (5) is arranged above the interior of the protective shell (1), and a limit groove (6) is provided on the inner surface of the inner ring frame (5); a limit pin (7) is slidably arranged in the limit groove (6), and a rubbing wheel (8) is fixed to the end of the limit pin (7); an arc-shaped sliding groove (9) is provided on the surface of the rubbing wheel (8), and a sliding pin (10) is inserted into the arc-shaped sliding groove (9); a movable shell cover (11) is fixed to the bottom end of the sliding pin (10).

2. The high-precision force sensor with protective effect according to claim 1, characterized in that: A positioning assembly (2) is installed on the inner bottom surface of the protective housing (1), and four groups of positioning assemblies (2) are provided.

3. The high-precision force sensor with protective effect according to claim 2, characterized in that: The positioning assembly (2) comprises a swing arm (201), a clamping roller (202) and a sliding seat (203), wherein the end of the swing arm (201) is connected to the clamping roller (202) via a rotating shaft, and the sliding seat (203) is sleeved on the outside of the swing arm (201).

4. The high-precision force sensor with protective effect according to claim 3, characterized in that: The positioning assembly (2) further comprises a damping shock absorber (204) and a connecting seat (205), and the damping shock absorber (204) is arranged outside the sliding seat (203), and the connecting seat (205) is installed at the other end of the damping shock absorber (204).

5. The high-precision force sensor with protective effect according to claim 4, characterized in that: One end of the swing arm (201) away from the clamping roller (202) is rotatably connected to the protective shell (1) via a rotating shaft, and the middle part of the connecting seat (205) is rotatably connected to the protective shell (1) via a rotating shaft.

6. The high-precision force sensor with protective effect according to claim 4, characterized in that: The clamping rollers (202) are distributed in a circular shape at equal intervals along the outer side of the force sensor body (3), and the clamping rollers (202) and the force sensor body (3) are tightly fitted.

7. The high-precision force sensor with protective effect according to claim 1, characterized in that: The limit pin (7) is in an L-shaped structure, and two limit pins (7) are symmetrically arranged about the center position of the rubbing wheel (8).

8. The high-precision force sensor with protective effect according to claim 1, characterized in that: The movable shell cover (11) penetrates through grooves on the front and rear surfaces of the protective shell (1), and the number of the sliding pins (10) and the movable shell cover (11) is the same.

Images