Hollow structure loader service brake disc test device

Abstract

The utility model relates to a hollow structure loader service brake disc test device. A power assembly, a brake installation assembly, a brake pump output assembly and a control center are installed on a base assembly. An output shaft of the power assembly is connected with an input shaft of the brake mounting assembly through a coupling; brake assemblies are mounted on the brake mounting assembly, four groups of pistons and two groups of friction plates which are bilaterally symmetrical are arranged in each brake assembly, and an output pipeline of the brake pump output assembly is connected to a pressure input port of each brake assembly; and the control center is connected with the power assembly and the brake pump output assembly. By simulating the characteristics of the actual working condition of the brake disc, the temperature rise change of the hollow-structure brake disc and the solid-structure brake disc is verified on year-on-year basis, and the obvious advantages of the heat dissipation performance of the hollow-structure brake disc are clear, so that the structural design of the loader brake disc is optimized, and the safe and reliable running brake of a machine during long-time operation is realized; and potential safety hazards of personnel and equipment are greatly reduced.

Description

Technical Field

[0001] The utility model relates to a hollow structure loader driving brake disc test device, belonging to the technical field of mechanical equipment. Background Art

[0002] A loader is a multifunctional engineering machinery that integrates shoveling, transportation, loading, unloading, and pushing. The operating objects involve many complex working conditions such as ore, earthwork, sand and gravel, coal, and clay. There are many types of engineering vehicles on the working site, and the working space is subject to various conditions. During the operation, the driver will frequently perform forward, backward, braking, loading and unloading, and lifting operations. Therefore, the loader's service brake system is required to be very sensitive and reliable, otherwise it will cause collision damage or serious personal injury accidents to the surrounding personnel, equipment, and facilities. At present, loaders in the industry generally adopt a solid brake disc structure, and the braking principle is air-top oil-caliper disc brake. Brake discs are installed on the wheel hubs on both sides of the front and rear drive axles. The brake discs and tire assemblies rotate synchronously in the same direction. The brake calipers are fixed on the support shafts at both ends of the front and rear drive axles. They are static and do not rotate with the wheel hubs. When the driver steps on the brake pedal, the brake air circuit valve opens, pushing the brake pump piston to transfer the pressure oil to each group of brake pistons in the brake caliper. The friction plate is pushed to clamp the brake disc, thereby limiting the rotation of the wheel hub and achieving effective braking of the machine; the driver releases the pedal, the clamping force of the brake caliper disappears, and the service brake is released; due to the large weight and inertia of the loader, in such frequent braking, release and re-braking and re-release processes, most of the kinetic energy of the vehicle is converted into thermal energy of the brake disc and the friction pair, and the temperature of the brake disc friction pair continues to rise, resulting in an increasingly effective braking distance for the entire machine, and increasingly poor braking reliability, resulting in frequent safety accidents and posing a safety hazard to the lives and property of on-site personnel; the utility model proposes a hollow structure loader service brake disc test device, which simulates the characteristics of the actual operating conditions of the brake disc, verifies the temperature rise changes of the hollow structure brake disc and the solid structure brake disc year by year, and clarifies the obvious advantages of the heat dissipation performance of the hollow structure brake disc, thereby optimizing the structural design of the loader brake disc, achieving safe and reliable service braking for long-term mechanical operation, and greatly reducing the safety hazards of personnel and equipment. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a test device for the service brake disc of a hollow structure loader, to simulate the service braking characteristics of the loader to design a test device which combines power transmission, control and braking, to install a hollow structure brake disc and a solid brake disc of the same material, thickness, outer diameter and installation size, respectively, and to perform a simulated braking test, to verify the heat dissipation effect of the hollow structure brake disc and the solid structure brake disc by comparing the temperature rise tests of the two brake discs under the same time, braking conditions and braking frequency; to make it clear that the heat dissipation performance of the hollow structure brake disc is significantly better than that of the solid structure brake disc, thereby providing technical support for the design and improvement of the product brake system and solving the potential safety hazard of reduced braking performance of the loader brake disc due to high temperature.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is: a hollow structure loader driving brake disc test device, including a base assembly, on which a power assembly with adjustable speed and direction functions, a brake mounting assembly, a brake pump output assembly and a control center are installed; the output shaft of the power assembly is connected to the input shaft of the brake mounting assembly through a coupling; the brake mounting assembly is equipped with a brake assembly, each brake assembly has four groups of pistons and two groups of friction plates that are symmetrical on the left and right, and the two groups of friction plates are respectively connected to the four groups of pistons; the output pipeline of the brake pump output assembly is connected to the pressure input port of the brake assembly; the control center is connected to the power assembly and the brake pump output assembly, and is used to control the power assembly and the brake pump output assembly to simulate various working conditions of the loader braking system.

[0005] Furthermore, during the test, a hollow brake disc for the test is first installed on the brake mounting assembly, and then replaced with a solid brake disc tested in the same manner after the test, for comparison of the temperature rise conditions of the two tests.

[0006] Furthermore, the hollow brake disc has a hollow structure in the middle, the brake plates on both sides are connected by a middle reinforcing rib, and the cavities are interconnected and connected to the atmosphere.

[0007] Furthermore, the solid brake disc and the hollow brake disc have the same material, thickness, and external mounting dimensions, and can be interchangeably assembled on the brake mounting assembly.

[0008] The beneficial effects of the utility model are:

[0009] The utility model simulates the driving braking characteristics of a loader and designs a test device which combines power transmission, control and braking. A hollow structure brake disc and a solid brake disc of the same material, thickness, outer diameter and installation size are installed respectively, and a simulated braking test is performed. By comparing the temperature rise tests of the two brake discs under the same time, braking conditions and braking frequency, the heat dissipation effects of the hollow structure brake disc and the solid structure brake disc are verified. It is clear that the heat dissipation performance of the hollow structure brake disc is significantly better than that of the solid structure brake disc, thereby providing technical support for the design and improvement of the product braking system and solving the safety hazard of decreased braking performance of the loader brake disc due to high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a front view of the hollow structure loader service brake disc test device of the utility model;

[0011] Figure 2 It is a side view of the hollow structure loader service brake disc test device of the utility model;

[0012] Figure 3 The utility model is a structural diagram of the brake assembly of the hollow structure loader driving brake disc test device. DETAILED DESCRIPTION

[0013] In order to make the present invention more obvious and easy to understand, preferred embodiments are described in detail as follows in conjunction with the accompanying drawings.

[0014] like Figure 1 , 2 As shown in Figure 3, the utility model provides a hollow structure loader driving brake disc test device, including a base assembly 1, on which a power assembly 2 with adjustable speed and direction function, a brake mounting assembly 6, a brake pump output assembly 7 and a control center 9 are installed; a coupling 3 connects the output shaft of the power assembly 2 with the input shaft of the brake mounting assembly 6; a brake assembly 4 is assembled to the brake mounting assembly 6, and each brake assembly 6 has four groups of pistons 10 and two groups of friction plates 12 symmetrically built in the left and right; the two groups of friction plates 12 are respectively connected to the four groups of pistons 10; the output pipeline of the brake pump output assembly 7 is connected to the pressure input port 11 of the brake assembly 4 ; The hollow brake disc 5 is a hollow structure in the middle, and the brake plates on both sides are connected by reinforcing ribs in the middle, and the cavities are interconnected with the atmosphere; the solid brake disc 8 and the hollow brake disc 5 have the same material, thickness, and external mounting dimensions, and can be interchangeably assembled to the brake mounting assembly 6; the control center 9 can realize the power assembly 2 and the brake pump output assembly 7 to simulate various working states of the loader braking system according to the set program, control the movement of the piston 10 in the brake assembly 4 and push the friction plate 12 to clamp the brake disc to implement braking or release braking, so that the brake disc heats up, which is equivalent to comparing and testing the temperature rise of the hollow brake disc 5 and the solid brake disc 8, and comparing and evaluating the heat dissipation performance of the two types of brake discs;

[0015] The assembly process is as follows:

[0016] Step 1: Install the coupling 3 onto the powertrain 2.

[0017] Step 2: Install the power assembly 2 with the coupling 3 installed on the base 1;

[0018] Step 3: Install the brake mounting assembly 6 onto the base assembly 1 and connect it with the coupling 3;

[0019] Step 4: Install the brake pump output assembly 7 onto the base assembly 1;

[0020] Step 5: Install the hollow brake disc 5 or the solid brake disc 8 onto the brake mounting assembly 6; then install the brake assembly 4 onto the brake mounting assembly 6, and adjust the position so that there is a gap between the two sides of the brake disc and the friction plate 12; connect the pressure output pipe of the brake pump output assembly 7 to the pressure input port 11 of the brake assembly 4;

[0021] Step 6: Install the control center 9 on the base 1 and connect the control lines of each part;

[0022] Step 7: Power on the control center 9 and debug the device;

[0023] Step 8: When implementing the experiment, only one of the hollow brake disc 5 or the solid brake disc 8 can be installed for separate testing, that is, interchangeable comparison.

Claims

1. A hollow structure loader service brake disc test device, including a base assembly, characterized in that: The base assembly is installed with a power assembly with adjustable speed and direction functions, a brake installation assembly, a brake pump output assembly and a control center; the output shaft of the power assembly is connected to the input shaft of the brake installation assembly through a coupling; the brake installation assembly is equipped with a brake assembly, each brake assembly has four groups of pistons and two groups of friction plates that are symmetrical on the left and right, and the two groups of friction plates are respectively connected to the four groups of pistons; the output pipeline of the brake pump output assembly is connected to the pressure input port of the brake assembly; the control center is connected with the power assembly and the brake pump output assembly, and is used to control the power assembly and the brake pump output assembly to simulate various working conditions of the loader braking system.

2. The hollow structure loader service brake disc test device according to claim 1 is characterized in that: During the test, a hollow brake disc for the test is first installed on the brake mounting assembly, and then replaced with a solid brake disc tested in the same manner after the test, for comparison of the temperature rise conditions of the two tests.

3. The hollow structure loader service brake disc test device according to claim 2 is characterized in that: The hollow brake disc has a hollow structure in the middle, and the brake plates on both sides are connected by a middle reinforcing rib, and the cavities are connected to each other and to the atmosphere.

4. The hollow structure loader service brake disc test device according to claim 2, characterized in that: The solid brake disc and the hollow brake disc have the same material, thickness, and external mounting dimensions, and can be interchangeably assembled on the brake mounting assembly.

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