JPH0448521Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a test device for brake parts, and more specifically, to test brake operating parts such as calipers for disc brakes and brake chambers for air brakes after regeneration in a state that approximates actual usage conditions. This invention relates to a device that can test airtightness or liquidtightness.

Conventionally, when overhauling a brake system, for example, the vehicle disc brake caliper 1 shown in FIG. 1 is removed from the vehicle, the piston 2 is taken out from the caliper, and the seal 3 is replaced.
The caliper 1 is reassembled into the vehicle, and while the vehicle is actually running, the operator repeatedly depresses the brake pedal to determine whether the remanufactured caliper is good or bad. Therefore, if an abnormality such as oil leakage is found in the remanufactured caliper, the caliper must be removed from the vehicle, disassembled and repaired, and then reassembled to the vehicle and tested, which is a drawback that requires a great deal of time and effort. It was hot.

The present invention has been made to eliminate the above-mentioned conventional drawbacks, and for this purpose, a brake component testing device according to the present invention includes: a solenoid valve connectable to a pressurized air source via an air supply pipe; a timer that can be controlled to open and close at predetermined time intervals for a predetermined period of time; the solenoid valve is connected to the solenoid valve and is operated by compressed air supplied from the solenoid valve controlled by the timer; a master cylinder that delivers pressure oil according to the control of a timer; a conduit having one end connected to the pressure oil outlet of the master cylinder and the other end connectable to the pressure oil inlet of a regenerative brake component removed from a vehicle, etc.; and a hydraulic pressure gauge provided in the conduit;
The quality of the recycled brake parts is determined by directly visually inspecting the leakage of pressure oil from the recycled brake parts or by reading the oil pressure gauge, and after the brake parts are recycled, before they are assembled into a vehicle, etc. The present invention is characterized in that it is possible to determine whether the remanufactured brake parts are good or bad under conditions similar to actual usage conditions.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Fig. 2 shows the case where the present invention is applied to a test device for a disc brake caliper of a wheel type tractor shovel. A solenoid valve connected to the supply pipe 4; 6 a timer connected to the solenoid valve 5 to control the solenoid valve to operate intermittently, that is, open and close at predetermined time intervals; and 7 a pipe connected to the solenoid valve 5; A master cylinder for the vehicle brake connected via 8, 9 is the master cylinder 7
1 is a regeneration caliper to be tested connected to the master cylinder 7 via a connecting pipe or conduit 10, and 11 is an oil pressure gauge connected to the pipe 10, respectively.

The timer 6 includes a timer part 6a that can set the total operating time of the solenoid valve 5, and a timer part that can set the opening time and closing time of the solenoid valve to open and close the solenoid valve in a constant cycle during the operating time. Consists of 6b and 6c. Further, the master cylinder 7 is operated by compressed air supplied from a solenoid valve 5 controlled by a timer 6, and sends pressure oil to the regenerated caliper 1 in accordance with the control of the timer. That is, for example, if the timers 6a, 6b, and 6c are set to 1 hour, 3 seconds, and 2 seconds, the solenoid valve 5 will open for 3 seconds and then close for 2 seconds repeatedly for 1 hour, and as a result, the master cylinder 7 and Similarly, the caliper 1 is repeatedly operated by applying pressure for 3 seconds and releasing it for 2 seconds, making it possible to repeat the operation test more than 700 times in one hour. The results of this test are determined by directly visually observing oil leakage from sliding parts etc. near the piston 2 and by checking the pressure drop in the oil pressure gauge 11 to determine whether the regenerated caliper 1 is good or not.

In this way, in the device of the above embodiment, the timer 6 controls the time corresponding to the time the operator depresses the brake pedal, the time the operator releases the brake pedal, and the time the operator continues to repeat these operations, so that the regenerated caliper 1 is operated as if Since we have made it possible to test under the same conditions as when testing by installing the device on an actual vehicle, once the device is set up, the test will be performed automatically, eliminating the need for manpower during that time, reducing time and effort. I can do it.

Although the above embodiments have been described with particular reference to brake parts for vehicles, the device of the present invention can also be used for testing brake parts other than those for vehicles.

As described above, according to the present invention, it is possible to perform a test to determine the quality of brake parts in a state that approximates the actual usage conditions before assembling them into a vehicle. It is possible to detect oil leakage from brake parts before installing them into an actual vehicle under the same conditions as when testing them by installing them on an actual vehicle. It is possible to reduce time and effort.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of a disc brake caliper, and FIG. 2 is a diagrammatic view of the test device of the present invention. 1... Caliper, 5... Solenoid valve, 6... Timer, 7... Master cylinder, 11... Oil pressure gauge.

Claims (1)

[Claims for Utility Model Registration] 1. A solenoid valve connectable to a pressurized air source via an air supply pipe; A timer controllable to open and close the solenoid valve at predetermined time intervals for a predetermined time period; a master cylinder connected to a solenoid valve, operated by compressed air supplied from the solenoid valve controlled by the timer, and delivering pressurized oil according to the control of the timer; A conduit that is connected to the pressure oil outlet of the regenerated brake component and whose other end can be connected to the pressure oil inlet of the regenerated brake component removed from the vehicle; and an oil pressure gauge installed in the conduit; A testing device for remanufactured brake parts that determines the quality of the remanufactured brake parts by directly visually inspecting for leaks or by reading the oil pressure gauge. 2. The device according to item 1, wherein the brake component is a disc brake caliper.