CN219320056U

CN219320056U - Tool device for measuring static friction force of friction material by using universal testing machine

Info

Publication number: CN219320056U
Application number: CN202223327787.1U
Authority: CN
Inventors: 郑元贵; 陈奇; 李旭鸿
Original assignee: Fujian Guanlean Automotive Parts Industry Co ltd
Current assignee: Fujian Guanlean Automotive Parts Industry Co ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-07-07
Anticipated expiration: 2032-12-13

Abstract

The utility model relates to a tool device for measuring static friction force of friction materials by adopting a universal testing machine, in particular to the field of friction force measurement of friction materials for automobiles. The utility model can acquire the first peak value in the pulling and lifting process through the universal testing machine, obtain the static friction force, calculate the positive pressure by matching with the weight of the weighing sample and the balancing weight, obtain the static friction coefficient, reduce the operation of redundant working procedures, and has the advantages of simple structure, short development period, high precision and low input cost.

Description

Tool device for measuring static friction force of friction material by using universal testing machine

Technical Field

The utility model belongs to the field of friction force testing of friction materials for automobiles, and particularly relates to a tool device for testing static friction force of friction materials by using a universal testing machine.

Background

At present, friction materials for automobiles are tested by using more dynamic friction force devices, and with the development of industry, the requirements of static friction force tests are also increased. The existing test equipment can test static friction force and dynamic friction force at the same time, and a large-scale detection equipment-bench is generally used. However, the bench test requires that the original-size friction material is assembled on the braking device, and the assembling process is time-consuming and labor-consuming, and particularly, when only static friction force is detected, the complicated operation is not needed. In order to solve the problems, the utility model provides a tool device for measuring the static friction force of a friction material by using a universal testing machine, wherein the tool device can be used for measuring the static friction force of the friction material by only cutting a part of the friction material and matching with the conventional universal testing machine of a manufacturer, and is relatively simple and convenient to operate.

Disclosure of Invention

(1) Technical problem to be solved

Aiming at the problems in the prior art, the utility model provides the tool device for measuring the static friction force of the friction material by using the universal testing machine, which can be reasonably manufactured and used to make up for the defects in the prior art.

(2) Technical proposal

In order to achieve the technical purpose, the utility model provides the tool device for measuring the static friction force of the friction material by adopting the universal testing machine, which comprises the universal testing machine, wherein the universal testing machine is provided with a universal testing machine beam, one side of the universal testing machine beam is provided with an adjustable horizontal platform, the upper end of the adjustable horizontal platform is stacked with a dual disc, the dual disc is provided with a balancing weight, the bottom of the balancing weight is detachably provided with a friction material sample, the friction material sample is contacted with the top of the dual disc, one end of the balancing weight, which is close to the universal testing machine, is provided with a steel wire rope for traction and is arranged on a fixed testing machine clamp after crossing a guide wheel, and the fixed testing machine clamp is arranged on the universal testing machine beam.

Preferably, the guide wheels comprise a first guide wheel and a second guide wheel which are positioned at different heights, the first guide wheel is arranged at an included angle between the dual disc and the universal testing machine, the second guide wheel is arranged on the universal testing machine, and the radius of the second guide wheel is larger than that of the first guide wheel.

Preferably, a connection tester clamp is mounted on top of the second guide wheel.

Preferably, a platform support frame is arranged on one side of the universal testing machine cross beam, and the adjustable horizontal platform is arranged on the platform support frame.

Preferably, the range of motion on the dual disc is the same as the range of motion on the adjustable horizontal platform.

(3) Advantageous effects

The utility model can acquire the first peak value in the pulling and lifting process through the universal testing machine, obtain the static friction force, calculate the positive pressure by matching with the weight of the weighing sample and the weight, and obtain the static friction coefficient.

Drawings

The utility model is further described below with reference to the drawings and examples. Wherein:

fig. 1 is a schematic diagram of the overall structure of the present utility model.

The reference numerals are: 1. balancing weight; 2. a friction material sample; 3. a dual disc; 4. an adjustable horizontal platform; 5. a wire rope; 6. the first guide wheel; 7. the second guide wheel; 8. connecting a clamp of the testing machine; 9. fixing a clamp of the testing machine; 10. a universal testing machine; 11. a cross beam of the universal testing machine; 12. and a platform supporting frame.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Examples:

referring to fig. 1, the tool device for measuring the static friction force of friction materials by adopting a universal testing machine of the utility model comprises a universal testing machine 10, wherein a universal testing machine beam 11 is arranged on the universal testing machine 10, one side of the universal testing machine beam 11 is provided with an adjustable horizontal platform 4, and the adjustable horizontal platform 4 is arranged on a platform support frame 12 _， The upper end of the adjustable horizontal platform 4 is stacked with a dual disc 3, and in order to prevent the balancing weight 1 from sliding off, the movable range of the dual disc 3 is the same as the movable range of the adjustable horizontal platform 4; the balance weight 1 is arranged on the dual disc 3, the friction material sample 2 is detachably arranged at the bottom of the balance weight 1, and the friction material sample 2 can be detachably arranged at the bottom of the balance weight 1 in a bonding, locking and other manners, so that the replacement measurement is convenient; the friction material sample 2 contacts with the top of the dual disc 3, one end of the balancing weight 1, which is close to the universal testing machine 10, is provided with a steel wire rope 5 for traction and is arranged on a fixed testing machine clamp 9 after crossing the guide wheels, the guide wheels comprise a first guide wheel 6 and a second guide wheel 7 with different heights, the traction directions of the steel wire rope 5 are enabled to form a right angle by the first guide wheel 6 and the second guide wheel 7, the first guide wheel 6 is arranged at the included angle between the dual disc 3 and the universal testing machine 10, the second guide wheel 7 is arranged on the universal testing machine 10, the radius of the second guide wheel 7 is larger than that of the first guide wheel 6, and the fixed testing machine clamp 9 is arranged on a cross beam 11 of the universal testing machine to form a complete testing tool.

In using the device, the following is used: the friction coefficient is equal to the friction force divided by the positive pressure, the first peak value f and f in the stretching process are the static friction force through a universal testing machine, and the mass of the sample and the balancing weight is weighed to calculate the positive pressure, so that the static friction coefficient can be calculated.

The method comprises the following steps:

1. as shown in the figure, the device and the friction material samples are placed well, the dual disc can be properly selected according to the test requirement and the friction material, and the adjustable horizontal platform is adjusted to be in a horizontal state;

2. weighing the weight m1 and the weight m2 of the friction material sample, calculating the total weight m, placing the friction material sample at the lower groove of the weight, continuously stretching at the speed of 1mm/min, and collecting a first peak value f in the stretching process by a universal testing machine;

3. and calculating the static friction coefficient according to the formula of the static friction coefficient mu=f/m g, and recording to finish one friction material sample test.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A tool device for measuring static friction force of friction materials by using a universal testing machine is characterized in that: the universal testing machine comprises a universal testing machine (10), a universal testing machine beam (11) is arranged on the universal testing machine (10), an adjustable horizontal platform (4) is arranged on one side of the universal testing machine beam (11), a dual disc (3) is stacked at the upper end of the adjustable horizontal platform (4), a balancing weight (1) is arranged on the dual disc (3), a friction material sample (2) is detachably arranged at the bottom of the balancing weight (1), the friction material sample (2) is in contact with the top of the dual disc (3), a steel wire rope (5) is arranged at one end, close to the universal testing machine (10), of the balancing weight (1) to pull and stride a guide wheel, and then the balancing weight is arranged on a fixed testing machine clamp (9), and the fixed testing machine clamp (9) is arranged on the universal testing machine beam (11).

2. The tooling device for measuring static friction force of friction material by using a universal testing machine according to claim 1, wherein the tooling device comprises: the guide wheels comprise first guide wheels (6) and second guide wheels (7) which are located at different heights, the first guide wheels are arranged at the included angles of the dual disc (3) and the universal testing machine (10), the second guide wheels (7) are arranged on the universal testing machine (10), and the radius of the second guide wheels (7) is larger than that of the first guide wheels (6).

3. The tool device for measuring static friction force of friction material by using a universal testing machine according to claim 2, wherein the tool device comprises: and the top of the second guide wheel (7) is provided with a connecting tester clamp (8).

4. A tool device for measuring static friction force of friction material by using a universal testing machine according to claim 3, wherein: one side of the universal tester cross beam (11) is provided with a platform support frame (12), and the platform support frame (12) is provided with the adjustable horizontal platform (4).

5. The tool device for measuring static friction force of friction material by using a universal testing machine according to any one of claims 1-4, wherein the tool device comprises: the movable range on the dual disc (3) is the same as the movable range on the adjustable horizontal platform (4).