CN207440044U - A kind of material friction coefficient measurement device - Google Patents

Abstract

The utility model discloses a material friction coefficient measuring device, which belongs to an experimental testing instrument. The device includes a screw, a nut, a fixed block, a rocker, an arc ruler, an adjustable slant plate, a support rod, a base, and two ball screws are placed obliquely on the two bases, and the nut and the fixed block on the ball screw It is connected with screws, and the left and right ends of the support rod are connected to the base. When the operator puts the object to be tested on the inclined surface, the rocker is turned, and the ball screw rotates to drive the nut to move on the screw, so that the adjustable slant plate can change the angle. When the desired angle is reached, stop turning the rocker, and readings can be made on the two side arc rulers of the device. Moreover, the device can be disassembled and assembled, takes up little space and is easy to carry. In addition, the utility model has the advantages of simple structure, convenient operation, no external power supply, and can be placed on a horizontal test bench or ground in a laboratory.

Description

A Material Friction Coefficient Measuring Device

technical field

The utility model relates to a teaching appliance, in particular to a measuring device for measuring the friction coefficient of materials.

Background technique

In the field of agricultural engineering, especially in the process of feed processing and production, the concept of friction coefficient is relatively abstract, and friction coefficient is an important parameter in storage, transportation, processing and other processes.

The current method of measuring the friction coefficient is to place the material on an adjustable sloping plate, and the angle at which the material just slides off the plate is the friction angle, and the friction coefficient can be calculated based on the friction angle. Existing pendulum-type coefficient of friction tester generally comprises a base, a column installed on the top of the base, and a pendulum mounted on the top of the column in rotation, the base includes T-shaped legs, and the three end parts of the T-shaped legs are respectively installed A leveling screw, the problem is that the T-shaped leg is generally formed in one piece, takes up a lot of space, is not easy to transport, and has high processing costs.

Contents of the invention

In order to solve the above problems, the utility model provides a material friction coefficient measurer.

The technical solution of the utility model is: a material friction coefficient measuring device, including a base 3, a ball screw 9, a nut 6, a rocker 1, an arc ruler 4, an adjustable slant plate 11 and a support rod 10;

The base 3 is composed of two identical L-shaped brackets. The two L-shaped brackets are placed in parallel and in the same direction. The two sides of the bottom are connected by connecting rods 7. Ball screws are respectively fixed on the L-shaped brackets on both sides. 9. One end of the ball screw 9 is fixed on the top of the vertical side of the L-shaped bracket, and the other end is fixed on the bottom edge of the L-shaped bracket;

The upper end of the ball screw 9 is fixed with a rotatable rocker 1, and the ball screw 9 is provided with a nut 6 matching it. The nut 6 is connected with the fixed block 5, and a support rod 10 is connected between the fixed blocks 5 on both sides. , the adjustable slant plate 11 is placed on the support rod 10, the bottom of the adjustable slant plate 11 is fixed between the L-shaped brackets on both sides, and the outer sides of the L-shaped brackets on both sides are fixed with a circular arc ruler 4 corresponding to the ball screw 9 .

Further, the upper end of the ball screw 9 is covered with a rocker sleeve 2, the rocker 1 is fixed on the rocker sleeve 2, and the lower end of the ball screw 9 is fixed on the bottom edge of the L-shaped bracket through the base slider 8 .

Further, the ball screw 9 forms an included angle of 45° with the bottom edge of the L-shaped bracket, and the long side of the L-shaped bracket serves as the bottom edge.

Further, the bottom of the adjustable slant plate 11 is fixed between the L-shaped brackets on both sides through a shaft, and the adjustable slant plate 11 moves around the shaft to change the angle.

The working principle of the utility model: when working, the operator puts the material on the adjustable slant plate, shakes the rocker arm to lift the adjustable slant plate to a certain height, when the material slides down, stops shaking the rocker arm, and on the side of the base At this time, observe the scale on the scale.

The beneficial effect of the utility model: it has good intuitiveness, and can accurately obtain the relative sliding friction force of the test object. Adopting the ball screw transmission mode, the continuity is good, and the angle can be fine-tuned, which is suitable for experimental research. Moreover, the device can be disassembled and assembled, occupies little space, is easy to carry, and has low cost. In addition, the present invention is simple in structure, easy to operate, does not need external power supply, and can be placed on a horizontal test bench or ground in a laboratory.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is the left view of the utility model;

Each label in Fig. 1 is: 1 is the rocker arm, 2 is the rocker arm sleeve, 3 is the base, 4 is the arc ruler, 5 is the fixed block, 6 is the nut, 7 is the connecting rod, 8 is the base slider, 9 Is a ball screw, 10 is a support rod, and 11 is an adjustable swash plate.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

Embodiment 1: As shown in Figure 1, a material friction coefficient measuring device includes a base 3, a ball screw 9, a nut 6, a rocker 1, an arc ruler 4, an adjustable inclined plate 11 and a support rod 10;

The base 3 is composed of two identical L-shaped brackets. The two L-shaped brackets are placed in parallel and in the same direction. The two sides of the bottom are connected by connecting rods 7. Ball screws are respectively fixed on the L-shaped brackets on both sides. 9. One end of the ball screw 9 is fixed on the top of the vertical side of the L-shaped bracket, and the other end is fixed on the bottom edge of the L-shaped bracket; the upper end of the ball screw 9 is fixed with a rotatable rocker 1, and the upper end of the ball screw 9 The nut 6 is set to cooperate with it, and the nut 6 is connected with the fixed block 5, and the support rod 10 is connected between the fixed blocks 5 on both sides, and the adjustable inclined plate 11 is placed on the support rod 10, and the bottom of the adjustable inclined plate 11 It is fixed between the L-shaped brackets on both sides, and the arc ruler 4 is fixed on the outside of the L-shaped brackets on both sides corresponding to the ball screw 9.

Embodiment 2: The upper end of the ball screw 9 is covered with a rocker sleeve 2, the rocker 1 is fixed on the rocker sleeve 2, and the lower end of the ball screw 9 is fixed on the bottom edge of the L-shaped bracket through the base slider 8 , the ball screw 9 forms an included angle of 45° with the bottom edge of the L-shaped bracket, and the long side of the L-shaped bracket is used as the bottom edge.

As shown in FIG. 2 , when the operator puts the object to be tested on the adjustable slant plate 11 , the rocker 1 is rotated clockwise, and the nut 6 moves upward slowly under the control of the ball screw 9 . The nut 6 is connected with the fixed block 5, and the support rod 10 is connected with the fixed blocks 5 on both sides. When the nut 6 moves upward, it drives the support rod 10 to move, and the adjustable inclined plate 11 placed on the support rod 10 is fixed by the shaft at the bottom. Between the L-shaped brackets on both sides, as the support rod 10 moves, the adjustable inclined plate 11 rotates upward around the axis, and its angle with the horizontal plane changes. When the object to be measured can slide on the adjustable slant plate 11, stop turning the rocker 1, the operator can observe the angle on the circular ruler 4 with scale on the side, and record the angle on the circular ruler 4.

The specific implementation of the utility model has been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned implementation. Various changes are made.

Claims (4)

1. A material friction coefficient measuring device, characterized in that it includes a base (3), a ball screw (9), a nut (6), a rocker (1), an arc ruler (4), an adjustable swash plate ( 11) and support rod (10); The base (3) is composed of two identical L-shaped brackets, the two L-shaped brackets are placed in parallel and in the same direction, the two sides of the bottom are connected by connecting rods (7), and the L-shaped brackets on both sides are respectively fixed There is a ball screw (9), one end of the ball screw (9) is fixed on the top of the vertical side of the L-shaped bracket, and the other end is fixed on the bottom edge of the L-shaped bracket; The upper end of the ball screw (9) is fixed with a rotatable rocker (1), and the ball screw (9) is sheathed with a nut (6) matched with it, and the nut (6) is connected with the fixed block (5). The support rods (10) are connected between the fixed blocks (5) on the side, the adjustable slant plate (11) is placed on the support rods (10), and the bottom of the adjustable slant plate (11) is fixed on the L-shaped brackets on both sides Between, the outer sides of the L-shaped brackets on both sides are fixed with arc rulers (4) corresponding to the ball screw (9). 2. The material friction coefficient measuring device according to claim 1, characterized in that: the ball screw (9) The upper end is covered with a rocker sleeve (2), the rocker (1) is fixed on the rocker sleeve (2), and the lower end of the ball screw (9) is fixed on the bottom edge of the L-shaped bracket through the base slider (8) superior. 3. The material friction coefficient measuring device according to claim 2, characterized in that: the ball screw (9) forms an included angle of 45° with the bottom edge of the L-shaped bracket, and the long side of the L-shaped bracket serves as the bottom edge. 4. The material friction coefficient measuring device according to claim 1, characterized in that: the bottom of the adjustable sloping plate (11) is fixed between the L-shaped brackets on both sides through a shaft, and the adjustable sloping plate (11) Movement around an axis produces a change in angle.