JP3146801B2 - Multi-axis brake test equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake test apparatus for a vehicle and the like, and more particularly to a brake test apparatus capable of simultaneously testing a large number of brakes with different types of pressurizing apparatuses.

[0002]

2. Description of the Related Art Brake devices are one of the most important safety devices for vehicles such as automobiles.
It is extremely important to ensure this safety.

FIG. 2 is a basic configuration diagram of a commonly used brake test apparatus. Reference numeral 11 denotes a drive motor, which is a variable-speed DC motor for accelerating the brake test machine to an initial speed. Numeral 12 denotes a flywheel which gives inertia corresponding to the weight shared by the brakes. 13 is the brake under test, 1
4 is a pressurizing device of a pressurizing source for operating the brake 13 to be tested, for example, a hydraulic unit; 15 is a brake operating device, which is a master cylinder mainly used for an actual vehicle, an actuator (hydraulic cylinder) for operating the master cylinder, It is composed of an electrohydraulic servo valve and the like. Reference numeral 16 denotes a brake control device.

[0004] Brake testing methods are broadly classified into constant input control, that is, constant brake hydraulic pressure or pedaling force, and constant output control, that is, constant deceleration or constant brake torque. Therefore, the brake test device can perform hydraulic control and torque control.

FIG. 2 is a basic configuration diagram of a brake test apparatus.
In the case of testing one brake, in the case of testing two brakes, two symmetric brakes are attached to the drive motor on the same shaft, and two are tested simultaneously. Also,
The apparatus for simultaneously testing four brakes is to test two brakes at the same time by connecting two test apparatuses at the same time by a transmission such as a gear.

[0006]

2. Description of the Related Art Currently, brakes for large trucks and trailers are roughly classified into hydraulic brakes and air brakes. Generally, four to six brakes are used for one vehicle. In the case of a trailer, the loading side is separated from and connected to the vehicle side, so the piping for the brake pressure also needs to be attached and detached. When the pipe is disconnected, oil leaks from the hydraulic brake, so air is used for the detachable portion. Therefore, an air brake or air boost is provided on the loading side (the brake pressure is controlled on the vehicle side, the air pressure is converted to hydraulic pressure on the way, and a hydraulic brake is used for the brake body)
Is limited to On the other hand, hydraulic brakes are often used because hydraulic brakes have better characteristics.

The main components (drum, lining) of the brake are composed of common components of hydraulic pressure and air, and if a hydraulic cylinder is installed as an operating component, it becomes a hydraulic brake, and if an air chamber is installed, it becomes an air brake. Also.

[0008] In view of the above configuration or the structure of the brake, the brake requires a test using a different pressure source, and a brake test for a large vehicle such as a trailer or a large truck requires hydraulically controlled (M / M). The test is performed by C control), air pressure control (air chamber control), and air boost control (control by both hydraulic pressure and air).

Conventionally, each test apparatus is provided by these M / C control, air chamber control and air boost control,
The test was performed with each test device. Therefore, there is a problem that it takes a long time for the test, and when testing different types of brakes such as M / C control and boost control, it is difficult to determine the balance (control distribution) of the brakes.

In view of the above, the present invention provides a test apparatus of this kind which enables these tests to be performed by a single multi-axis brake test apparatus using MC control, air chamber control, and air boost control. The purpose is to provide.

[0011]

Means for solving the above-mentioned problems in the present invention are a transmission having a plurality of drive shafts and output shafts, and a drive / test provided on each of the drive shafts and output shafts. An apparatus unit and a test apparatus unit, a brake operating means provided in each of the drive / test apparatus unit and the test apparatus unit to operate the brake under test, and a different pressurizing device for pressurizing the brake under test, Each pressurizing device and each of the driving / testing device units and the brake operating means of the testing device unit are connected by piping via an operating valve.

Further, the drive and test device unit does not include the brake to be tested and the brake operating means, and may simply be a drive motor.

[0013]

When a brake test is performed by hydraulic control, only the operating valves provided between each brake operating means and the hydraulic pressurizing device are opened, and the other operating valves are closed to control the pressure of each brake to be tested. And test the various characteristics of the brake. Similarly, in the case of air boost control or air control, only the operation valve connected to the pressurizing device to be used is opened and the other valves are closed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention, showing an example in which six brakes are tested simultaneously. In the figure, G is a transmission, which is constituted by gears and the like. S ₁ , S ₂ and S _{3 to} S ₆ are drive shafts and output shafts provided on the left and right sides of the transmission G, and the respective drive shafts and output shafts are connected by gears in the transmission.
M ₁ and M ₂ are drive motors, and the shafts at one end are drive shafts S ₁ and S _{2, respectively.}
The brakes B ₁ and B ₂ to be tested are mounted on the other end of the shaft. Husband to the output shaft S ₃ to S ₆ people flywheel FW
_The brakes B _{3 to} B ₆ to be tested are mounted via _{1 to} FW ₄ . T _{1 to} T ₆ are torque detectors, each of the brakes B _{1 to} be tested.
It is provided to ~B _6. 1 is a hydraulic pressurizing device, 2
Denotes a pressurizing device by air boost and 13 denotes a pressurizing device by air. C ₁ -C ₆ is installed in the brake operating device for operating under test brake (hydraulic cylinder or air chamber is attached to the brake), each tested brake B ₁ ~B _6. P ₁ , P ₂ , and P ₃ are pipes connected to a hydraulic pressurizing device 1, an air boost pressurizing device 2, and an air pressurizing pressurizing device, respectively. Each of the pipes P ₁ , P ₂ , and P ₃ is ,
And it is connected to the respective pressurizing device 1, 2, 3 and the brake operating device C ₁ -C ₆ operated via a valve _{OB 1, OB 2, OB 3} .

[0016] Pg ₁ is a hydraulic detector, Pg ₂ is a boost pressure vessel, Pg ₃ is an air pressure detector, P 'indicates a pressure detector provided in each brake operating device C ₁ -C _6.

Ud ₁ and Ud ₂ are drive / test equipment units. Each unit includes drive motors M ₁ and M ₂ , brakes B ₁ and B ₂ to be tested, torque detectors T ₁ and T _2, and a brake operating device C ₁ , C ₂ and operation valves OB ₁ , OB ₂ , OB ₃ . Ut ₁ , Ut ₂ , Ut ₃ , and Ut ₄ are test equipment units. These test equipment units are flywheels FW ₁ , FW ₂ , FW ₃ , FW ₄ , and brakes B ₃ , B ₄ , B _{5 to} be tested. , B ₆ and the torque detectors T ₃ , T ₄ ,
And T _5, T _6, is constituted by a brake operating device _{C 3, C 4, C 5} , C 6 and operating valves OB _1, OB _2, OB _3, these basically similar brake tests as each unit 2 Has functions.

The test of each brake to be tested is performed by the drive motor M
_1, the input shaft S ₁ driving the M ₂ (rotating) the transmission G,
S _2, transmission G, an output shaft S ₃ to S ₆ of the transmission, rotates the tested brakes via a flywheel FW ₁ ~FW _4, the brake is pressurized by the brake operating device C ₁ -C ₆ Brake Test the various properties of

Although the basic method for testing the characteristics of the brakes is not different from the conventional one, the present invention is characterized in that tests using different types of pressurizing sources such as hydraulic pressure and air are simultaneously switched and tested.

[0020] Now, when tested by hydraulic pressure, opens only an operation valve OB ₁ of the brake operating device C ₁ -C _6, other operations to be each of the processing apparatus 1 by the hydraulic pressure by closing the valve OB _2, OB ₃ A predetermined test is performed by applying pressure to the test brakes B _{1 to} B ₆ to operate the brakes.

Similarly, in the case of air boost control, only the operation valve B ₂ is opened and B ₁ and B ₃ are closed. In the case of air control, only the operation valve B ₃ is opened and B ₁ and B ₂ are closed. The brakes B _{1 to} B ₆ to be tested are supplied from the respective pressurizing devices 2 and 3.
A predetermined test is performed by applying pressure to the brake to operate the brake.

When the mixing control is performed, a test can be similarly performed by opening an operation valve to be mixed.

As described above, a large number of brakes can be tested at the same time, and tests using different pressure sources can be performed in the same mounting state.

In the embodiment shown in FIG. 1, a case has been described in which the brakes to be tested are also mounted on the drive motor and six brakes are tested at the same time. However, any one to six brakes may be tested. Of course, it may be possible.

[0025]

Since the present invention is constructed as described above, the brakes to be tested are mounted on the test device only once and mixed or independently selected with different pressure sources such as hydraulic pressure and air pressure. The test can be performed in a specific manner, and the test can be performed by switching each brake in the same state, so that the load balance of the brake can be tested.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a basic configuration diagram of a brake test device.

[Explanation of symbols]

1 ... hydraulic by pressurizing device 2 ... pressure device by the air boost by pressure device 3 ... air Ut ₁ ~Ut ₆ ... test apparatus unit G ... gear S ₁ to S ₆ ... Axis FW ₁ ~FW ₄ ... Flywheel B ₁ ~B ₆ ... tested brake T ₁ through T ₆ ... torque sensor C ₁ -C ₆ ... brake operating device OB ₁ ~OB ₃ ... operation valves P ₁ to P ₃ ... pipe

Claims (2)

(57) [Claims] 1. A transmission having a plurality of drive shafts and output shafts, a drive / test device unit and a test device unit provided on each drive shaft and output shaft, and a drive / test device unit and a test device each A brake operating means provided in the unit for operating the brake under test, and different types of pressurizing devices for pressurizing the brake under test, wherein each of these pressurizing devices and the brakes of the respective drive / test device unit and test device unit are provided. A multi-axis brake test apparatus, wherein the operating means is connected to the operating means by a pipe via an operating valve. 2. The multi-axis brake test apparatus according to claim 1, wherein the drive / test apparatus unit does not include a brake to be tested and a brake operating means, and is simply a drive motor.