CN201838230U - Friction force instrument - Google Patents

Abstract

The utility model relates to a friction meter, which comprises a base plate, a top plate, an elastic plate, a chute pointer, a friction direction pointer and a dial; the elastic plate is arranged between the bottom plate and the top plate; The said bottom plate is provided with said friction force direction pointer and dial horizontally respectively, and vertical bar is arranged in the middle of longitudinal direction, and the bottom end of said vertical bar is connected with said dial; the upper end of said vertical bar is provided with a limit shaft , and connected with the chute of the chute pointer through the limit shaft; one end of the chute of the chute pointer is connected with the middle of the top plate through the rotation shaft, and the other end is connected with the friction direction through the contact bolt. The pointers are connected. The utility model has the advantages of simple structure, simple processing, convenient use and wide application range, effectively solves the long-standing problems in the friction test, makes the abstract concept of friction easy to understand, and also solves the problem of friction characteristics between materials. research questions.

Description

Tribometer

technical field

The utility model relates to a friction force experiment device, in particular to a friction force meter capable of indicating the direction of friction force and displaying the size of friction force and conducting research on the friction characteristics between materials.

Background technique

The currently widely used friction test device uses a spring balance to directly pull the slider to measure the magnitude of the friction force, but it cannot indicate the direction of the friction force, so the measurement is inconvenient and the accuracy is not high.

Utility model content

The technical problem to be solved by the utility model is to provide a friction meter with simple structure and convenient use.

In order to solve the above problems, a friction meter described in the utility model is characterized in that: the friction meter includes a bottom plate, a top plate, an elastic plate, a chute pointer, a friction direction pointer and a dial; the bottom plate and the The elastic plate is arranged between the top boards; the friction direction pointer and the dial are respectively arranged horizontally on the bottom board, and a vertical bar is arranged in the middle of the longitudinal direction, and the bottom end of the vertical bar is connected with the dial; The upper end of the vertical bar is provided with a limit shaft, and is connected with the chute of the chute pointer through the limit shaft; one end of the chute of the chute pointer is connected with the middle part of the top plate through the rotation shaft, and its The other end is connected with the friction force direction pointer through a contact bolt.

The upper and lower sides of the friction direction pointer are respectively symmetrically provided with a pair of limit nails with the vertical bar as a symmetrical axis.

The center of the dial is provided with a zero position, and the two sides of the zero position are respectively provided with scales.

Compared with the prior art, the utility model has the following advantages:

1. Since the utility model is equipped with an elastic plate, a chute pointer, a friction direction pointer and a dial, not only the direction of the friction force can be intuitively indicated by the pointer, but also the magnitude of the friction force can be read and measured. The maximum static friction force is used to study the friction characteristics between materials.

2. Since the utility model complies with the physical principle of the friction process, it is not only suitable for dynamic friction force, but also suitable for direction indication and size reading of static friction force. Therefore, it effectively solves the long-standing problems in the friction force test and makes the abstract friction force The concept becomes easy to understand, and also solves the research problem of friction characteristics between materials.

3. The utility model has the advantages of simple structure, simple processing, convenient use and wide application range.

Description of drawings

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the principle of the utility model.

Fig. 3 is a schematic diagram of deformation of the utility model under the state of static friction only.

In the figure: 1-Bottom plate 2-Top plate 3-Elastic plate 4-Limiting nail 5-Upright bar 6-Limiting shaft 7-Rotating shaft 8-Slot pointer 9-Contact bolt 10-Friction direction pointer 11-Dial 12 - External force.

Detailed ways

As shown in FIG. 1 , a friction meter includes a bottom plate 1 , a top plate 2 , an elastic plate 3 , a chute pointer 8 , a friction force direction pointer 10 and a dial 11 . An elastic plate 3 is arranged between the base plate 1 and the top plate 2; a friction force direction indicator 10 and a dial 11 are respectively arranged horizontally on the base plate 1; connected; the upper end of the vertical bar 5 is provided with a limit shaft 6, and is connected with the chute of the chute pointer 8 through the limit shaft 6; one end of the chute of the chute pointer 8 is connected with the middle part of the top plate 2 through the rotating shaft 7 The other end is connected with the friction force direction pointer 10 through the contact bolt 9 .

Wherein the upper and lower sides of the friction direction pointer 10 are respectively symmetrically provided with a pair of limit nails 4 with the vertical bar 5 as the symmetrical axis; the center of the dial 11 is provided with a zero position, and the two sides of the zero position are respectively provided with scales. When the utility model was not stressed, the chute pointer 8 pointed to the zero position of the dial 11.

Embodiment 1 As shown in Figure 2, the utility model is placed on the support surface, and an external force 12 is applied to the top plate 2 to make the utility model move on the support surface.

Due to the action of the external force 12, the top plate 2 is driven to move in the direction pointed by the external force 12, resulting in deformation of the elastic plate 3, so that the rotating shaft 7 drives the chute pointer 8 to rotate and slide relative to the limit shaft 6, and the chute pointer 8 can be read Take the magnitude of the friction force, and at the same time, the chute pointer 8 pushes the friction force direction pointer 10 to move in the opposite direction of the external force 12, indicating the direction of the friction force.

Embodiment 2 As shown in Figure 3, the utility model is placed on the support surface, which can be a horizontal plane, an inclined plane or a table top for uniform circular motion.

The utility model is in a static state, but has a movement tendency. The chute pointer 8 rotates and slides relative to the limit shaft 6, and the magnitude of the static friction force can be read through the chute pointer 8, while the friction force direction pointer 10 indicates the direction of the static friction force.

Example 3 Put the utility model on the supporting surface, arrange heavy objects of different weights on the top plate 2, thereby changing the positive pressure; apply force to the top plate 2, make the utility model move at a uniform speed, and record the sliding friction under different positive pressures Force value, and mark the corresponding points on the Cartesian coordinates to obtain the relationship curve between normal pressure and sliding friction and the coefficient of sliding friction, which can be used to study the relationship between normal pressure and sliding friction and the coefficient of friction.

Embodiment 4 A material is fixedly connected to the bottom surface of the bottom plate 1, the utility model is placed on a support surface made of another material, and a force is applied to the utility model to make it move at a constant speed. The normal pressure is changed by disposing weights of different weights on the top plate 2, and the experiment is continued to record the values of the sliding friction force under different normal pressures, and mark the corresponding points on the Cartesian coordinates to obtain the relationship between the normal pressure and the sliding friction force. The relationship curve and the coefficient of sliding friction can be used to obtain the friction characteristics between the two materials.

Claims (3)

1. friction force instrument, it is characterized in that: this friction force instrument comprises base plate (1), top board (2), elastic plate (3), chute pointer (8), friction force arm for direction indicator (10) and index dial (11); Be provided with described elastic plate (3) between described base plate (1) and the described top board (2); Laterally be respectively equipped with described friction force arm for direction indicator (10), index dial (11) on the described base plate (1), longitudinal middle part then is provided with upright bar (5), and the bottom of this upright bar (5) links to each other with described index dial (11); The upper end of described upright bar (5) is provided with a limit shaft (6), and links to each other with the chute of described chute pointer (8) by this limit shaft (6); Chute one end of described chute pointer (8) links to each other with the middle part of described top board (2) by rotation axis (7), and its other end links to each other with described friction force arm for direction indicator (10) by contact bolt (9).

2. friction force instrument as claimed in claim 1 is characterized in that: the both sides up and down of described friction force arm for direction indicator (10) are that axis of symmetry is arranged with a pair of banking pin (4) respectively with described upright bar (5).

3. friction force instrument as claimed in claim 1 is characterized in that: the center of described index dial (11) is provided with zero-bit, and these zero-bit both sides are respectively equipped with scale.

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