Pendulum type friction coefficient tester

Abstract

The utility model provides a pendulum type friction coefficient tester which comprises a base, the end part of the base is in threaded connection with a supporting rod, the top surface of the base is fixedly connected with a stand column, one side of the top of the stand column is fixedly connected with a cross rod, and the end part of the cross rod is fixedly connected with a clamping piece. The pendulum bob has the advantages that by arranging the auxiliary pendulum bob, the mounting box, the guide rod, the end piece, the clamping plate, the spring, the L-shaped pull rod and other structures, when the main pendulum bob swings downwards, the auxiliary pendulum bob also swings downwards, the auxiliary pendulum bob makes contact with and extrudes the clamping plate firstly, the clamping plate moves towards the interior of the mounting box, and at the moment, the spring is extruded. And the main pendulum bob can pass through smoothly. After the auxiliary pendulum bob collides with the clamping plate, the auxiliary pendulum bob begins to swing back. The clamping plate loses extrusion and is pushed by the spring to reset. When the main pendulum bob swings back, the main pendulum bob is clamped by the clamping plate to prevent the main pendulum bob from swinging back. And the main pendulum bob does not need to be quickly caught manually, so that the use is more convenient, the problem of errors is avoided, and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of road surface anti-skid detection, in particular to a pendulum type friction coefficient tester. Background Art

[0002] The pendulum friction coefficient tester is an instrument specially used to measure the friction coefficient of road surfaces, airport runways, road marking paints, etc. The pendulum friction coefficient tester works based on the dynamic pendulum impact principle. Its basic principle is that "the potential energy loss of the pendulum is equal to the work done by the rubber sheet at the end of the pendulum arm to overcome the friction of the road surface when it slides on the road surface." The friction coefficient of the road surface is calculated by measuring the swing attenuation of the pendulum.

[0003] The existing pendulum friction coefficient tester uses the rotation of the pendulum and the pointer, and uses the friction between the pendulum and the detection surface to reduce the potential energy of the pointer, so that the pointer indicates on the scale, and the test result is obtained according to the degree. However, when the existing tester is used, it is necessary to quickly catch the pendulum when the pendulum swings back to avoid the movement of the pointer caused by the swing back of the pendulum. If the pendulum cannot be caught in time, the accuracy of the test result may be affected. For this reason, a pendulum friction coefficient tester is proposed to make an improvement. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0005] Therefore, one purpose of the present invention is to provide a pendulum type friction coefficient tester to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, an embodiment of the utility model provides a pendulum friction coefficient tester, comprising a base, a support rod is threadedly connected to the end of the base, a column is fixedly connected to the top surface of the base, a cross bar is fixedly connected to one side of the top of the column, a clamp is fixedly connected to the end of the cross bar, a scale is fixedly connected to the other side of the column, a pointer is rotatably connected to the front of the top of the column, and a main pendulum rotates on the outer side of the pointer;

[0007] An auxiliary pendulum is rotatably connected to the ruler, a mounting box is fixedly connected to the base, a guide rod is inserted in the mounting box, an end piece is fixedly connected to the rear end of the guide rod, a clamping plate is fixedly connected to the front end of the guide rod, a side of the clamping plate close to the clamping piece adopts an inclined surface, a spring is arranged between the end piece and the mounting box, an L-shaped pull rod is fixedly connected to the auxiliary pendulum, and the L-shaped pull rod is clamped on the side of the main pendulum close to the clamping piece.

[0008] Preferably, any of the above solutions adopts a T-shaped structure, and a rotating handle is fixedly connected to the top end of the support rod.

[0009] Preferably, any of the above schemes is provided with a bubble level on the base, and a handle is fixedly connected to the crossbar.

[0010] The above technical solution is adopted: the base provides an installation platform for the upper structure, and it adopts a T-shaped structure so that it can provide relatively stable support for the upper structure. A support rod is set at the end of the base, and the support height of the support rod can be adjusted according to the actual situation of the detection surface to make the base horizontal. A bubble level is set on the base to assist the staff in leveling the base. A turning handle is set at the top of the support rod to facilitate the staff to turn the support rod. The column provides support for the upper structure and enables it to obtain a certain height. The crossbar is supported by the clamping part, and a handle is set on the crossbar to facilitate the staff to lift the device.

[0011] Preferably, any of the above solutions is that a button is provided on the front of the clamping member, and the scale has an arc-shaped structure.

[0012] Preferably, any of the above schemes is that an adjustable friction pad is provided at the bottom of the main pendulum, and an end of the auxiliary pendulum away from the clamping member adopts an inclined surface.

[0013] The above technical solution is adopted: the clamp is used to clamp the main pendulum so that the main pendulum gains potential energy. The button set on the front of the clamp is convenient for the staff to unlock the clamp of the main pendulum and make the main pendulum swing downward quickly. The ruler provides scale and cooperates with the pointer to display the detection structure. The main pendulum is used to swing. When performing the detection work, the main pendulum is clamped in the clamp after zeroing. After spraying the relevant reagent on the detection surface, the clamp is controlled to unlock the main pendulum. The main pendulum swings down under the action of gravity and contacts the surface to be detected, so that the pointer marks the position on the upper part of the ruler.

[0014] Preferably, in any of the above schemes, the installation box is arranged below the scale, and the end piece adopts a circular structure.

[0015] Preferably, in any of the above schemes, the spring is sleeved on the outside of the guide rod, and the L-shaped pull rod is arranged at the lower part of the auxiliary pendulum.

[0016] The above technical solution is adopted: under the pulling action of the L-shaped pull rod, when the main pendulum is clamped by the clamping member, the auxiliary pendulum moves up with it and also obtains potential energy. When the main pendulum swings downward, the auxiliary pendulum also swings downward, and the auxiliary pendulum first contacts and squeezes the card plate, and the card plate moves into the installation box, and the spring is squeezed at this time. The main pendulum can pass smoothly. After the auxiliary pendulum hits the card plate, it starts to swing back. The card plate loses its squeezing and is pushed back by the spring. When the main pendulum swings back, it will be stuck by the card plate, preventing it from swinging back.

[0017] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0018] The pendulum friction coefficient tester is provided with a secondary pendulum, a mounting box, a guide rod, an end plate, a card plate, a spring, an L-shaped pull rod and other structures. When the main pendulum swings downward, the secondary pendulum also swings downward. The secondary pendulum first contacts and squeezes the card plate, and the card plate moves into the mounting box. At this time, the spring is squeezed. This allows the main pendulum to pass smoothly. After the secondary pendulum hits the card plate, it starts to swing back. The card plate loses its squeezing and is pushed back by the spring. When the main pendulum swings back, it will be stuck by the card plate, preventing it from swinging back. There is no need to manually catch the main pendulum quickly, which is not only more convenient to use, but also avoids the problem of mistakes, and is more practical.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of the utility model from a first perspective;

[0022] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;

[0023] Figure 3 It is a schematic diagram of the cutaway structure of the installation box of the utility model.

[0024] In the figure: 1-base, 2-support rod, 3-column, 4-cross bar, 5-clamp, 6-ruler, 7-pointer, 8-main pendulum, 9-secondary pendulum, 10-installation box, 11-guide rod, 12-end piece, 13-clip plate, 14-spring, 15-L-shaped pull rod. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figures 1 to 3 As shown, the utility model comprises a base 1, a support rod 2 is threadedly connected to the end of the base 1, a column 3 is fixedly connected to the top surface of the base 1, a cross bar 4 is fixedly connected to one side of the top of the column 3, a clamping member 5 is fixedly connected to the end of the cross bar 4, a scale 6 is fixedly connected to the other side of the column 3, a pointer 7 is rotatably connected to the front of the top of the column 3, and a main pendulum 8 is rotated on the outer side of the pointer 7;

[0028] A secondary pendulum 9 is rotatably connected to the scale 6, a mounting box 10 is fixedly connected to the base 1, a guide rod 11 is inserted in the mounting box 10, an end piece 12 is fixedly connected to the rear end of the guide rod 11, a clamping plate 13 is fixedly connected to the front end of the guide rod 11, a side of the clamping plate 13 close to the clamping member 5 adopts an inclined surface, a spring 14 is arranged between the end piece 12 and the mounting box 10, an L-shaped pull rod 15 is fixedly connected to the secondary pendulum 9, and the L-shaped pull rod 15 is clamped on the side of the main pendulum 8 close to the clamping member 5.

[0029] Embodiment 1: The base 1 adopts a T-shaped structure, and a turning handle is fixedly connected to the top of the support rod 2. A bubble level is provided on the base 1, and a handle is fixedly connected to the cross bar 4. The base 1 provides an installation platform for the upper structure, and its T-shaped structure enables it to provide relatively stable support for the upper structure. The support rod 2 is provided at the end of the base 1, and the support height of the support rod 2 can be adjusted according to the actual situation of the detection surface to make the base 1 horizontal. A bubble level is provided on the base 1 to assist the staff in leveling the base 1. A turning handle is provided at the top of the support rod 2 to facilitate the staff to rotate the support rod 2. The column 3 provides support for the upper structure and enables it to obtain a certain height. The cross bar 4 is supported by the clamp 5, and a handle is provided on the cross bar 4 to facilitate the staff to lift the device.

[0030] Embodiment 2: A button is provided on the front of the clamp 5, and the scale 6 adopts an arc structure. An adjustable friction pad is provided at the bottom of the main pendulum 8, and an inclined surface is adopted at the end of the auxiliary pendulum 9 away from the clamp 5. The clamp 5 is used to clamp the main pendulum 8 so that the main pendulum 8 obtains potential energy. The button provided on the front of the clamp 5 facilitates the staff to unlock the clamp 5 from the main pendulum 8, so that the main pendulum 8 swings downward quickly. The scale 6 provides a scale and cooperates with the pointer 7 to display the detection structure. The main pendulum 8 is used to swing. When performing the detection work, the main pendulum 8 is clamped in the clamp 5 after zeroing. After spraying the relevant reagent on the detection surface, the clamp 5 is controlled to unlock the main pendulum 8, and the main pendulum 8 swings down under the action of gravity and contacts the surface to be detected, so that the pointer 7 marks the position on the upper part of the scale 6.

[0031] Embodiment 3: The installation box 10 is arranged below the scale 6, and the end piece 12 adopts a circular structure. The spring 14 is sleeved on the outside of the guide rod 11, and the L-shaped pull rod 15 is arranged at the bottom of the auxiliary pendulum 9. Under the pulling action of the L-shaped pull rod 15, when the main pendulum 8 is clamped by the clamping member 5, the auxiliary pendulum 9 moves up with it and also obtains potential energy. When the main pendulum 8 swings downward, the auxiliary pendulum 9 also swings downward, and the auxiliary pendulum 9 first contacts and squeezes the card plate 13, and the card plate 13 moves into the installation box 10, and the spring 14 is squeezed at this time. The main pendulum 8 can pass smoothly. After the auxiliary pendulum 9 hits the card plate 13, it starts to swing back. The card plate 13 loses its squeezing and is pushed back by the spring 14. When the main pendulum 8 swings back, it will be stuck by the card plate 13, preventing it from swinging back.

[0032] The working principle of the utility model is as follows:

[0033] S1. Move the device to the desired position, rotate the support rod 2 as needed to adjust the base 1 to a horizontal state, and adjust the pointer 7 to zero;

[0034] S2, clamp the main pendulum 8 in the clamping member 5, and after spraying the relevant reagent on the detection surface, control the clamping member 5 to unlock the main pendulum 8, and the main pendulum 8 swings down under the action of gravity and contacts the surface to be detected, so that the pointer 7 marks the position on the upper part of the ruler 6;

[0035] S3, when the main pendulum 8 swings downward, the auxiliary pendulum 9 also swings downward, and the auxiliary pendulum 9 first contacts and presses the clamping plate 13, and the clamping plate 13 moves into the installation box 10, and the spring 14 is squeezed at this time. The main pendulum 8 can pass smoothly. After the auxiliary pendulum 9 hits the clamping plate 13, it starts to swing back. The clamping plate 13 loses its squeezing and is pushed back by the spring 14. When the main pendulum 8 swings back, it will be stuck by the clamping plate 13, preventing it from swinging back.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The pendulum type friction coefficient tester is provided with structures such as an auxiliary pendulum 9, a mounting box 10, a guide rod 11, an end piece 12, a card plate 13, a spring 14, and an L-shaped pull rod 15. When the main pendulum 8 swings downward, the auxiliary pendulum 9 also swings downward, and the auxiliary pendulum 9 first contacts and squeezes the card plate 13, and the card plate 13 moves into the mounting box 10, at which time the spring 14 is squeezed. This allows the main pendulum 8 to pass smoothly. After the auxiliary pendulum 9 hits the card plate 13, it starts to swing back. The card plate 13 loses its squeezing and is pushed back by the spring 14. When the main pendulum 8 swings back, it will be stuck by the card plate 13 to prevent it from swinging back. There is no need to manually quickly catch the main pendulum 8, which is not only more convenient to use, but also avoids the problem of mistakes, and is more practical.

Claims

1. A pendulum friction coefficient tester, comprising a base (1); characterized in that: The end of the base (1) is threadedly connected to a support rod (2), the top surface of the base (1) is fixedly connected to a column (3), one side of the top of the column (3) is fixedly connected to a cross bar (4), the end of the cross bar (4) is fixedly connected to a clamp (5), the other side of the column (3) is fixedly connected to a scale (6), the front side of the top of the column (3) is rotatably connected to a pointer (7), and the outer side of the pointer (7) rotates a main pendulum (8); The ruler (6) is rotatably connected to an auxiliary pendulum (9); the base (1) is fixedly connected to an installation box (10); a guide rod (11) is inserted into the installation box (10); the rear end of the guide rod (11) is fixedly connected to an end plate (12); the front end of the guide rod (11) is fixedly connected to a clamping plate (13); a side of the clamping plate (13) close to the clamping member (5) is provided with an inclined surface; a spring (14) is provided between the end plate (12) and the installation box (10); an L-shaped pull rod (15) is fixedly connected to the auxiliary pendulum (9); the L-shaped pull rod (15) is clamped to a side of the main pendulum (8) close to the clamping member (5).

2. A pendulum type friction coefficient tester as claimed in claim 1, characterized in that: The base (1) adopts a T-shaped structure, and the top end of the support rod (2) is fixedly connected with a rotating handle.

3. A pendulum type friction coefficient tester as claimed in claim 2, characterized in that: The base (1) is provided with a bubble level, and the crossbar (4) is fixedly connected with a handle.

4. A pendulum type friction coefficient tester as claimed in claim 3, characterized in that: A button is arranged on the front of the clamping member (5), and the scale (6) has an arc-shaped structure.

5. A pendulum type friction coefficient tester as claimed in claim 4, characterized in that: An adjustable friction pad is arranged at the bottom of the main pendulum (8), and an end of the auxiliary pendulum (9) away from the clamping member (5) adopts an inclined surface.

6. A pendulum type friction coefficient tester as claimed in claim 5, characterized in that: The installation box (10) is arranged below the scale (6), and the end piece (12) has a circular structure.

7. A pendulum type friction coefficient tester as claimed in claim 6, characterized in that: The spring (14) is sleeved on the outside of the guide rod (11), and the L-shaped pull rod (15) is arranged at the lower part of the auxiliary pendulum (9).

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