CN204422388U - A kind of device of mid point positioning control portable pendulum tester sliding length - Google Patents

Abstract

The utility model discloses a device for midpoint positioning and controlling the sliding length of a pendulum instrument. Including midpoint positioning point, instrument panel, pendulum rod and pendulum head. The midpoint positioning point is the marking point, the instrument panel is an arc-shaped irregular plane plate structure made of steel material, the swing rod is a straight rod made of steel material, the swing head is a rectangular box structure, and there is a friction rubber sheet at the lower end. The midpoint positioning point is the midline point of the triangle formed by the connection line between the swing rod and the swing head and the 126mm sliding length between the rubber sheet and the test road surface. The midline reflected on the test road surface is the sliding length that needs to be checked, that is, the swing rod When it coincides with the midpoint positioning points on both sides of the vertical line, it means that the sliding length calibration is completed. After adopting the device of the midpoint positioning point, the sliding length can be checked accurately only by corresponding the pendulum to the midpoint positioning point, realizing the quickness and accuracy of checking the sliding length. The utility model is easier to observe, simple and convenient to operate, and has high accuracy.

Description

A Device for Controlling the Sliding Length of a Pendulum Instrument by Positioning the Midpoint

technical field

The utility model relates to a device for controlling the sliding length of a pendulum instrument by midpoint positioning, which is applied to a measuring instrument for the friction coefficient of a road surface.

Background technique

According to the requirements of relevant technical specifications in our country, the friction coefficient index of the road surface is expressed by the friction coefficient. At present, the frequently used measurement equipment is the pendulum instrument. The operation process of the existing instrument to check the sliding length of 126mm is too complicated, including the process of adjusting the height of the instrument by using pads and repeatedly leveling the vial. It causes great difficulty in accurately checking the sliding length, and finally leads to a waste of time for measuring the friction coefficient of the road surface, and cannot achieve the goal of fast and accurate measurement.

Contents of the invention

In view of the above-mentioned defects and deficiencies in the prior art, the purpose of this utility model is to provide a device for midpoint positioning and control of the sliding length of a pendulum instrument. The midpoint positioning point is the marking point, the instrument panel is an arc-shaped flat plate structure of steel material, the swing rod is a straight rod of steel material, the swing head is a rectangular box structure, and there is a friction rubber sheet at the lower end. The midpoint positioning point is the midline point of the triangle formed by the connection line between the swing rod and the swing head and the 126mm sliding length between the rubber sheet and the test road surface. The midline reflected on the test road surface is the sliding length that needs to be checked, that is, the swing rod When it coincides with the midpoint positioning points on both sides of the vertical line, it means that the sliding length calibration is completed. After adopting the device of the midpoint positioning point, the sliding length can be checked accurately only by corresponding the pendulum to the midpoint positioning point, realizing the quickness and accuracy of checking the sliding length. The utility model is easier to observe, simple and convenient to operate, and has high accuracy.

In order to achieve the above object, the utility model adopts the following technical solutions:

A device for midpoint positioning to control the sliding length of a pendulum instrument, comprising a midpoint positioning point (1), an instrument pan (2), a swing rod (3), and a swing head (4).

The midpoint positioning point (1) is a marking point, one on the left and one on the right relative to the vertical line;

The instrument panel (2) is an arc-shaped flat plate structure of steel material;

The fork (3) is a straight rod of steel material;

The swing head (4) is a rectangular box structure with a friction rubber sheet at the lower end.

working principle:

The utility model uses two midpoint positioning points on the left and right of the instrument panel relative to the vertical line to mark points. The midpoint positioning point is formed by the connection line between the swing rod and the swing head and the 126mm sliding length between the rubber sheet and the test road surface. The midline point of the triangle, the midline reflected on the test road surface is the sliding length that needs to be checked, that is, when the swing bar coincides with the midpoint positioning points on both sides of the vertical line, it means that the sliding length check is completed.

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

After adopting the device of the midpoint positioning point, the sliding length can be checked accurately only by corresponding the pendulum to the midpoint positioning point, realizing the quickness and accuracy of checking the sliding length. The utility model is easier to observe, simple and convenient to operate, and has high accuracy.

Description of drawings

Fig. 1 is a schematic diagram of a device for controlling the sliding length of a pendulum instrument by midpoint positioning of the present invention:

In the figure: midpoint positioning point-1, instrument panel-2, pendulum rod-3, pendulum head-4.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

A device for midpoint positioning to control the sliding length of a pendulum instrument, comprising a midpoint positioning point 1, an instrument panel 2, a swing rod 3, and a swing head 4;

The midpoint positioning point 1 is a marking point, the instrument panel 2 is an arc-shaped flat plate structure of steel material, the swing rod 3 is a straight rod of steel material, the swing head 4 is a rectangular box structure, and there is a friction rubber at the lower end piece;

The midpoint positioning point 1 is located on the instrument panel 2, and is the midline point of the triangle formed by the connection line between the swing rod 3 and the swing head 4 and the sliding length of the rubber sheet and the test road surface of 126 mm. One midpoint anchor each;

The middle line connected by the midpoint positioning point 1 is reflected on the test road surface to be the sliding length that needs to be checked, that is, when the swing bar 3 coincides with the midpoint positioning point 1 on both sides of the vertical line, it means that the sliding length check is completed;

In the process of checking the sliding length of the rubber sheet at the end of the pendulum 3 and the pendulum head 4, the midpoint positioning point 1 marked on the instrument panel 2 relative to the vertical line to the left and right can be used to check the The length of the rubber sheet on the swing head 4 is checked with the contact points on the left and right sides of the test road surface. When the swing rod 3 coincides with the mark point on the midpoint positioning point 1, it means that the rubber sheet is in contact with the test road surface on the corresponding side. friction begins

The swing rod 3 and the swing head 4 are integrated into one body with a length of 508mm, and this community can swing freely;

The friction coefficient scale is engraved on the left side of the instrument panel 2;

The lower end of the swing head 4 is equipped with a rubber sheet for rubbing the road surface.

Claims (7)

1. A device for midpoint positioning to control the sliding length of a pendulum instrument, characterized in that it comprises a midpoint positioning point (1), an instrument panel (2), a fork (3), a swing head (4), and midpoint positioning The point (1) is a marking point, the instrument panel (2) is an arc-shaped flat plate structure of steel material, the swing rod (3) is a straight rod of steel material, the swing head (4) is a rectangular box structure, and the lower end There are friction rubber sheets. 2. A kind of midpoint positioning device for controlling the sliding length of a pendulum instrument as claimed in claim 1, characterized in that, the midpoint positioning point (1) is located on the instrument panel (2) and is a link between the pendulum bar (3) and the pendulum. The connecting line of the head (4) and the midline point of the triangle formed by the sliding length of the rubber sheet and the test road surface of 126mm, one on the left and one on the right midpoint relative to the vertical line. 3. the device of a kind of midpoint positioning control pendulum instrument sliding length as claimed in claim 2, it is characterized in that, the midline connected by midpoint positioning point (1) is reflected on the test road surface and is the sliding length that needs to be checked , when the fork (3) coincides with the midpoint positioning point (1) on both sides of the vertical line, it means that the sliding length check is completed. 4. the device of a kind of midpoint positioning control pendulum instrument slide length as claimed in claim 3, is characterized in that, after carrying out slide length calibration to the rubber sheet at the end of the pendulum (3) and the pendulum (4) community During the nuclear process, you can use the left and right midpoint positioning points (1) marked on the instrument panel (2) relative to the vertical line to align the rubber sheet on the swing head (4) with the left and right sides of the test road surface. Check the length of the contact point. When the pendulum (3) coincides with the marking point on the midpoint positioning point (1), it means that the rubber sheet is in contact with the test road surface on the corresponding side and friction begins. 5. the device of a kind of midpoint positioning control pendulum instrument slide length as claimed in claim 1, it is characterized in that, fork (3) and swing head (4) are integrated, and length is 508mm, and this community can freely swing. 6. A device for midpoint positioning control of the sliding length of a pendulum instrument as claimed in claim 1, characterized in that a friction coefficient scale is engraved on the left side of the instrument panel (2). 7. A device for controlling the sliding length of a pendulum by midpoint positioning as claimed in claim 1, characterized in that a rubber sheet for rubbing against the road surface is installed at the lower end of the swing head (4).