Shear force detection device of mechanical sensor

Abstract

The utility model relates to a shearing force detection device of a mechanical sensor, which comprises a detection bottom plate, two sliding rails are arranged in the middle of the upper end of the detection bottom plate in parallel, each sliding rail is provided with a sliding block sliding transversely, the mechanical sensor is fixed between the two sliding blocks, and a balance fixed pulley is rotationally arranged on one side of the upper end of the detection bottom plate. A first connecting wire is wound on the balance fixed pulley, two ends of the first connecting wire are respectively connected with one sides of the two sliding blocks, two reversing fixed pulleys are arranged on the other side of the upper end of the detection bottom plate in parallel, the other side of each sliding block is connected with a second connecting wire, and one end of each second connecting wire bypasses the corresponding reversing fixed pulley, faces downwards and is connected with a tray; and a weight is placed on the tray. The mechanical sensor is installed between the two sliding blocks, shearing force in opposite directions is generated through opposite movement of the two sliding blocks, the frequency change of the mechanical sensor can be caused by the shearing force, and then the acting force is detected by detecting the change of the frequency.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical sensor detection, in particular to a shear force detection device for a mechanical sensor. Background Technique

[0002] In the field of industrial automation, sensors are used very frequently, especially the application of mechanical sensors. For example, robots need to use mechanical sensors to achieve the purpose of induction in clamping, position control, etc.

[0003] Mechanical sensors are usually made based on principles such as piezoresistive, capacitive, fiber optic, piezoelectric, etc. The basic concept is to convert external mechanical energy into measurable electrical signals. Using a piezoelectric resonant quartz crystal as the core of mechanical induction, different from the piezoelectric principle, it can simultaneously monitor static and dynamic mechanical signals.

[0004] The action of mechanical energy is divided into different types of forces, such as transverse tensile and compressive forces, longitudinal tensile and compressive forces, bending forces, and shear forces, etc. At present, there is no shear force detection device for mechanical sensors, so it is a big problem in development and manufacturing. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a shear force detection device for a mechanical sensor. The mechanical sensor is installed between two sliders. By moving the two sliders in opposite directions, shear forces in opposite directions are generated. The shear forces will cause frequency changes in the mechanical sensor, and then the detection of the acting force is realized by detecting the frequency changes.

[0006] The technical solution adopted by the utility model to solve its technical problems is: to provide a shear force detection device for a mechanical sensor, including a detection base plate. In the middle of the upper end of the detection base plate, two slide rails are arranged in parallel. A laterally sliding slider is installed on each slide rail. A mechanical sensor is fixed between the two sliders. A balance fixed pulley is rotatably installed on one side of the upper end of the detection base plate. A first connecting line is wound around the balance fixed pulley. The two ends of the first connecting line are respectively connected to one side of the two sliders. On the other side of the upper end of the detection base plate, two reversing fixed pulleys are arranged in parallel. A second connecting line is connected to the other side of each slider. One end of the second connecting line bypasses the corresponding reversing fixed pulley and faces downwards and is connected to a tray, and weights are placed on the tray.

[0007] As a supplement to the technical solution of the utility model, a protective cover is installed on one side of the upper end of the detection base plate, and the balance fixed pulley is covered inside the protective cover.

[0008] As a supplement to the technical solution of the utility model, a convex platform is provided in the middle of the upper end of the detection base plate, and the two slide rails are fixedly installed on the convex platform.

[0009] As a supplement to the technical solution described in the present utility model, the weight is in a C shape, and the opening of the weight is clamped into the second connecting line for limiting.

[0010] As a supplement to the technical solution described in the present utility model, on the other side of the upper end of the detection bottom plate, three mounting supports are arranged in parallel, and a reversing fixed pulley is installed between every two mounting supports.

[0011] As a supplement to the technical solution described in the present utility model, two vertical slits are arranged in parallel on the side wall of the other side of the detection bottom plate.

[0012] As a supplement to the technical solution described in the present utility model, an installation notch is formed on the inner side of the upper part of each slider, a clamping plate is placed in the installation notch, and the clamping plate and the slider are fixed by fasteners, and one side of the mechanical sensor is clamped by the cooperation of the clamping plate and the bottom surface of the installation notch.

[0013] Beneficial effects: The present utility model relates to a shear force detection device for a mechanical sensor. The mechanical sensor is installed between two sliders. By moving the two sliders in opposite directions, shear forces in opposite directions are generated. The shear forces will cause changes in the frequency of the mechanical sensor, and then the detection of the acting force is realized by detecting the change in frequency; during the process of applying force, the gravity of the weight can be calculated and applied, the change in the frequency of the sensor can be accurately tested, and the relationship value between the force and the change in frequency can be calculated to achieve the purpose of accurate detection. The present utility model has the advantages of fast response time, high measurement accuracy, high stability, etc. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic diagram of different angles of the present utility model;

[0016] Figure 3 is a schematic structural diagram of the balance fixed pulley and the reversing fixed pulley described in the present utility model;

[0017] Figure 4 is a schematic diagram of the shear force detection process of the present utility model.

[0018] Illustration: 100, mechanical sensor; 101, clamping plate; 102, slider; 103, slide rail; 104, first connecting line; 105, weight; 106, protective cover; 107, balance fixed pulley; 108, balance fixed pulley shaft; 109, reversing fixed pulley; 100, detection bottom plate; 111, convex platform; 112, mounting support; 113, reversing fixed pulley shaft; 114, vertical slit; 115, tray; 116, second connecting line. Detailed implementation mode

[0019] The following combines specific embodiments to further elaborate on 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. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0020] The implementation mode of the present utility model relates to a shear force detection device for a mechanical sensor, as Figures 1-4 shown, including a detection bottom plate 110. In the middle of the upper end of the detection bottom plate 110, two slide rails 103 are arranged in parallel. A laterally sliding slider 102 is installed on each slide rail 103. A mechanical sensor 100 is fixed between the two sliders 102. On one side of the upper end of the detection bottom plate 110, a balance fixed pulley 107 is rotatably installed. A first connecting line 104 is wound around the balance fixed pulley 107. The two ends of the first connecting line 104 are respectively connected to one side of the two sliders 102. On the other side of the upper end of the detection bottom plate 110, two reversing fixed pulleys 109 are arranged in parallel. A second connecting line 116 is connected to the other side of each slider 102. One end of the second connecting line 116 bypasses the corresponding reversing fixed pulley 109 and extends downward to be connected to a tray 115, and weights 105 are placed on the tray 115.

[0021] As a preferred solution for the detection bottom plate 110, a protective cover 106 is installed on one side of the upper end of the detection bottom plate 110, and the balance fixed pulley 107 is covered inside the protective cover 106. A balance fixed pulley shaft 108 is provided in the middle of the balance fixed pulley 107. The balance fixed pulley shaft 108 is arranged vertically, and the balance fixed pulley 107 rotates around the balance fixed pulley shaft 108. The upper end of the balance fixed pulley shaft 108 is fixed to the protective cover 106, and the lower end of the balance fixed pulley shaft 108 is fixed to the detection bottom plate 110.

[0022] The surfaces of the balance fixed pulley 107 and the reversing fixed pulley 109 are smooth surfaces, and the surface friction is close to zero.

[0023] As a preferred solution for the detection bottom plate 110, a boss 111 is provided in the middle of the upper end of the detection bottom plate 110, and the two slide rails 103 are fixedly installed on the boss 111; the height of the slider 102 is raised by the boss 111, so that a part of the first connecting line 104 and the second connecting line 116 are in a horizontal state, improving the accuracy of detection.

[0024] The first connecting line 104 and the two second connecting lines 116 can be an integral connecting line, and the two sliders 102 are sleeved on the integral connecting line; or they can be three sections of connecting lines, which can be selected according to requirements; the connecting line is a steel wire or other high-rigidity wire.

[0025] As a preferred solution for the weight 105, the weight 105 is in a C shape, and the opening of the weight 105 is clamped into the second connecting line 116 for limiting; several weights 105 can be stacked together in sequence, and the lowermost weight 105 is supported by the weight 105.

[0026] As a preferred solution for the detection base plate 110, on the other side of the upper end of the detection base plate 110, three mounting supports 112 are arranged in parallel, and a reversing fixed pulley 109 is installed between every two mounting supports 112; a reversing fixed pulley shaft 113 is installed between the three mounting supports 112, the reversing fixed pulley shaft 113 is arranged horizontally, and the two reversing fixed pulleys 109 jointly rotate around a reversing fixed pulley shaft 113.

[0027] As a preferred solution for the detection base plate 110, two vertical slits 114 are arranged in parallel on the side wall of the other side of the detection base plate 110; setting the vertical slits 114 can provide a larger moving space for the second connecting line 116.

[0028] An installation notch is provided inside the upper part of each slider 102, a clamping plate 101 is placed in the installation notch, and the clamping plate 101 and the slider 102 are fixed by fasteners. The fasteners are selected as screws, and one side of the mechanical sensor 100 is clamped by the cooperation of the clamping plate 101 and the bottom surface of the installation notch.

[0029] Both sides of the mechanical sensor 100 are fixed and clamped by two clamping plates 101 in cooperation with the corresponding sliders 102 and fasteners. By moving the two sliders 102 in opposite directions, shear forces in opposite directions are generated. Weights 105 of the same weight are placed on the two trays 115 respectively. At this time, the weight is balanced and no shear force is generated, which is a static state. After adding weights 105 to one of the trays 115, gravitational forces FA and FB are generated respectively. The difference in gravitational forces between FA and FB transmits force energy through the connecting line to the two sliders 102, and then through the clamping plate 101 to the mechanical sensor 100, generating shear forces fa and fb. After acting on the mechanical sensor 100, dynamic balance is achieved. At this time, the shear force can transmit a signal to the processing unit through the mechanical sensor 100, and after signal analysis and processing, it is converted into mechanical data.

[0030] Shearing force can cause frequency changes in the mechanical sensor 10, and then the applied force can be detected by detecting the frequency changes. During the process of applying force, the gravity of the weight 105 can be calculated and applied to accurately test the frequency changes of the sensor, calculate the relationship value between force and frequency changes, and achieve the purpose of accurate detection. This utility model has the advantages of fast response time, high measurement accuracy, high stability, etc.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0032] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the figure for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will be positioned as "below other devices or structures" or "under other devices or structures" afterwards. Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations should be made for the spatial relative descriptions used here.

[0033] In addition, it should be noted that using words such as "first", "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional statement, the above words have no special meaning. Therefore, it should not be understood as a limitation on the protection scope of the present utility model.

[0034] The above has introduced in detail a shearing force detection device for a mechanical sensor provided by the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A shear force detection device for a mechanical sensor, comprising a detection bottom plate (110), characterized in that: In the middle of the upper end of the detection base plate (110), two slide rails (103) are arranged in parallel. A laterally sliding slider (102) is installed on each slide rail (103). A mechanical sensor (100) is fixed between the two sliders (102). On one side of the upper end of the detection base plate (110), a balance fixed pulley (107) is rotatably installed. A first connecting line (104) is wound around the balance fixed pulley (107). The two ends of the first connecting line (104) are respectively connected to one side of the two sliders (102). On the other side of the upper end of the detection base plate (110), two reversing fixed pulleys (109) are arranged in parallel. A second connecting line (116) is connected to the other side of each slider (102). One end of the second connecting line (116) bypasses the corresponding reversing fixed pulley (109) and extends downward to be connected to a tray (115). Weights (105) are placed on the tray (115).

2. The shear force detection device of a mechanical sensor according to claim 1, characterized in that: On one side of the upper end of the detection base plate (110), a protective cover (106) is installed, and the balance fixed pulley (107) is covered inside the protective cover (106).

3. The shear force detection device of a mechanical sensor according to claim 1, characterized in that: In the middle of the upper end of the detection base plate (110), a boss (111) is provided, and the two slide rails (103) are fixedly installed on the boss (111).

4. The shear force detection device of a mechanical sensor according to claim 1, characterized in that: The weight (105) is in a C shape, and the opening of the weight (105) is clamped into the second connecting line (116) for positioning.

5. The shear force detection device of a mechanical sensor according to claim 1, characterized in that: On the other side of the upper end of the detection base plate (110), three mounting supports (112) are arranged in parallel. A reversing fixed pulley (109) is installed between every two mounting supports (112).

6. The shear force detection device of a mechanical sensor according to claim 1, characterized in that: On the side wall of the other side of the detection base plate (110), two vertical slits (114) are arranged in parallel.

7. The shear force detection device of a mechanical sensor according to claim 1, wherein: On the inner side of the upper part of each slider (102), a mounting notch is provided. A clamping plate (101) is placed in the mounting notch. The clamping plate (101) is fixed to the slider (102) by a fastener. One side of the mechanical sensor (100) is clamped by the cooperation of the clamping plate (101) and the bottom surface of the mounting notch.

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