Friction force measuring device

Abstract

The present disclosure describes a frictional force measuring device comprising: a body defining an interior volume, the body having a plurality of receptacles concavely disposed in a top surface thereof for receiving balancing weights; an engagement device extending through a sidewall of the body to extend into the interior volume; a force sensor disposed in the internal volume and connected to the engagement means to sense a pulling force applied via the engagement means; the display screen is arranged in the side wall of the main body and is in communication connection with the force sensor so as to display the tension value sensed by the force sensor; and a plurality of friction bottom plates interchangeably mounted to the bottom surface of the main body.

Description

Technical Field

[0001] The present disclosure relates to the field of measurement technology, and in particular to a friction force measuring device. Background Art

[0002] Friction is a ubiquitous force in nature. Accurately measuring friction is of great significance to research and application in many fields, but it is also a technical challenge. Traditional friction measurement methods are usually based on indirect measurement, such as inferring friction by measuring the acceleration or torque of an object. The friction measured by these methods has low accuracy and is easily interfered by external factors. Utility Model Content

[0003] In order to at least partially solve the problems existing in the prior art, the present disclosure provides a friction force measuring device, comprising: a main body defining an internal volume, a top surface of the main body being concavely provided with a plurality of receptacles for accommodating a counterweight; a coupling device extending through a side wall of the main body to extend into the internal volume; a force sensor disposed in the internal volume and connected to the coupling device to sense a tension applied via the coupling device; a display screen disposed in the side wall of the main body and communicatively connected to the force sensor to display a tension value sensed by the force sensor; and a plurality of friction bottom plates interchangeably mounted to the bottom surface of the main body.

[0004] Alternatively, in some embodiments, a flange extending vertically upward is provided at a peripheral edge of the friction base plate, and the flange is tightly pressed against the side wall of the main body to limit relative movement of the main body and the friction base plate in the horizontal direction.

[0005] Alternatively, in some embodiments, the flange is configured not to extend beyond a lower edge of the display screen on a surface of the side wall where the display screen is disposed.

[0006] Alternatively, in some embodiments, a wireless communication device is also included in the internal volume, the wireless communication device is connected to the force sensor to send the tension value sensed by the force sensor to an external device, and the wireless communication device includes any one of Bluetooth, wireless LAN, Zigbee, and NFC transceivers.

[0007] Alternatively, in some embodiments, an additional display screen is further provided in another side wall of the main body opposite to the display screen, and the additional display screen is communicatively connected to the force sensor to display the tension value sensed by the force sensor.

[0008] Alternatively, in some embodiments, the display screen consists of a plurality of seven-segment, nine-segment, or sixteen-segment displays, or a combination thereof, arranged side by side.

[0009] Alternatively, in some embodiments, the receptacles are configured to have different diameters and depths from each other, so that the weights corresponding to the receptacles are snugly accommodated in the receptacles.

[0010] Alternatively, in some embodiments, the engagement means is formed as any of a hook, a loop, a handle.

[0011] Alternatively, in some embodiments the engagement means is removably connected to the force sensor.

[0012] The friction force measuring device provided by the present disclosure can add counterweights to change the mass of the device as needed, and can quickly change the roughness of the friction surface by replacing the friction base plate to verify the relationship between the magnitude of the friction force and the pressure and the roughness of the contact surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 shows a perspective view of a friction force measuring device according to the present disclosure;

[0014] Figure 2 An exploded view of a friction force measurement device according to the present disclosure is shown. DETAILED DESCRIPTION

[0015] The friction force measuring device disclosed in the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the utility model will become clearer according to the following detailed description and claims. It should be noted that the accompanying drawings are in a very simplified form and use non-precise ratios, which are only used for the purpose of conveniently and clearly assisting in explaining the embodiments of the utility model.

[0016] Reference Figure 1 and Figure 2 , which respectively show a stereoscopic view and an exploded view of a friction force measuring device according to the present disclosure.

[0017] The present disclosure provides a friction force measuring device including a main body 10 defining an internal volume, a plurality of weights 20 , and a plurality of friction base plates 30 interchangeably mounted to a bottom surface of the main body 10 .

[0018] The main body 10 includes a top surface, a bottom surface and four side walls. The inner volume is defined by the top surface, the bottom surface and the four side walls of the main body 10. A plurality of receptacles 11 for accommodating the counterweights 20 are recessedly provided in the top surface of the main body 10.

[0019] The receptacle 11 can be configured to have different or the same diameter and depth. In the first aspect, the receptacle 11 can be configured to have the same diameter and depth, and accordingly, the counterweight 20 can be implemented as having the same weight (any one of 100g, 50g, 20g, 10g, 5g, etc.), diameter, height, so that the side wall of the counterweight 20 corresponding to the receptacle 11 is accommodated in the receptacle 11. On the other hand, the receptacle 11 can be configured to have different diameters and / or depths, and accordingly, the counterweight 20 can be implemented as having the same weight, diameter, height. For example, the counterweight 20 can include multiple specifications such as 100g, 50g, 20g, 10g, 5g. The number of the counterweight 20 and the receptacle 11 can be consistent, and wherein for example the first receptacle can be configured to have a diameter equal to the diameter of the 100g specification counterweight, and a depth equal to the height of the 100g specification counterweight, and so on.

[0020] The peripheral edge of the friction bottom plate 30 is provided with a flange extending vertically upward, and the flange is tightly pressed against the side wall of the main body 10 to limit the relative movement of the main body 10 and the friction bottom plate 30 in the horizontal direction.

[0021] The friction force measuring device further includes an engagement device 13 extending through the side wall of the body 10 to extend into the internal volume, and a force sensor (not shown) disposed in the internal volume and connected to the engagement device 13 to sense a tensile force applied via the engagement device 13 .

[0022] The engagement device 13 is used to connect to an external device to apply a pulling force to the friction force measuring device. The engagement device 13 can be formed as any one of a hook, a ring, and a handle. In particular, the engagement device 13 is configured to be detachably connected to the force sensor so that the engagement device 13 can be replaced according to the scenario.

[0023] The friction force measuring device also includes a display screen 12, which is arranged in the side wall of the main body 10 and is communicatively connected to the force sensor to display the tension value sensed by the force sensor. In particular, the friction force measuring device may also include an additional display screen arranged in another side wall of the main body 10 opposite to the display screen 12, and the additional display screen is also communicatively connected to the force sensor to display the tension value sensed by the force sensor. In this way, people located at different positions of the friction force measuring device can observe the tension value displayed by the display screen. The display screen 12 may be implemented as a dot matrix display or a segment display. For example, alternatively, the display screen 12 may be composed of a plurality of seven-segment, nine-segment or sixteen-segment displays arranged side by side or a combination thereof.

[0024] Advantageously, the flange of the friction base 30 may be configured not to extend beyond the lower edge of the display screen 12 on the surface of the side wall provided with the display screen 12 , so that the friction base 30 does not block the content displayed on the display screen 12 .

[0025] In some embodiments, the friction force measuring device further includes a wireless communication device disposed in the internal volume, the wireless communication device being communicatively connected to the force sensor to send the tension value sensed by the force sensor to an external device (e.g., a PC, a mobile phone, etc.). The wireless communication device includes any one of a Bluetooth, a wireless LAN, a Zigbee, and an NFC transceiver.

[0026] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] As used in this disclosure and the appended claims, the singular forms "a", "an", "said", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0028] Obviously, those skilled in the art can make various changes and modifications to the friction force measuring device disclosed in the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A friction force measuring device, characterized in that: include: a main body defining an internal volume, wherein a plurality of receptacles for accommodating counterweights are recessedly disposed in a top surface of the main body; an engagement device extending through a side wall of the body to extend into the interior volume; a force sensor disposed in the interior volume and connected to the engagement device to sense a pulling force applied via the engagement device; a display screen disposed in a side wall of the main body and communicatively connected to the force sensor to display a tension value sensed by the force sensor; as well as A plurality of friction base plates are interchangeably mounted to the bottom surface of the body.

2. The friction force measuring device according to claim 1, characterized in that: A flange extending vertically upward is arranged on the peripheral edge of the friction bottom plate, and the flange is tightly pressed against the side wall of the main body to limit the relative movement of the main body and the friction bottom plate in the horizontal direction.

3. The friction force measuring device according to claim 2, characterized in that: The flange is configured not to extend beyond a lower edge of the display screen on a surface of the side wall where the display screen is disposed.

4. The friction force measuring device according to any one of claims 1 to 3, characterized in that: It also includes a wireless communication device arranged in the internal volume, the wireless communication device is connected to the force sensor to send the tension value sensed by the force sensor to an external device, and the wireless communication device includes any one of Bluetooth, wireless LAN, Zigbee, and NFC transceivers.

5. The friction force measuring device according to claim 4, characterized in that: An additional display screen is also included, which is arranged in another side wall of the main body opposite to the display screen. The additional display screen is communicatively connected to the force sensor to display the tension value sensed by the force sensor.

6. The friction force measuring device according to claim 1, characterized in that: The display screen is composed of a plurality of seven-segment, nine-segment or sixteen-segment displays or a combination thereof arranged side by side.

7. The friction force measuring device according to claim 1, characterized in that: The receptacles are configured to have different diameters and depths from each other, so that the counterweights corresponding to the receptacles are snugly accommodated in the receptacles.

8. The friction force measuring device according to claim 1, characterized in that: The engaging means is formed as any one of a hook, a loop and a handle.

9. The friction force measuring device according to claim 1, characterized in that: The engagement device is detachably connected to the force sensor.

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