CN203643086U - Braking balance detection device for pneumatic braking axle assembly - Google Patents

Abstract

The utility model provides a brake balance detection device for an air brake axle assembly, which comprises two brake air chambers and two axle heads of the axle assembly to be tested, and also includes a A drive unit for rotating the axle head and an axle head speed detection unit for detecting the axle head speed, the drive unit and the axle head speed detection unit are respectively connected to a control unit, and the control unit is connected to a display unit and an air compressor; the air compressor is connected with a brake main pipeline, the air compressor is located at one end of the brake main pipeline, and the other end of the brake main pipeline respectively passes through the first brake branch pipeline and The second brake branch pipeline is connected with the two brake air chambers, and the cross-sectional areas of the above two brake branch pipelines are equal, and an airflow control valve is arranged on the brake trunk pipeline. The solution can detect the brake balance performance of the axle assembly before the vehicle is completed, and is convenient to use and has strong practicability.

Description

A brake balance detection device for air brake axle assembly

technical field

The utility model relates to an electronic detection device for auto parts, in particular to a brake balance detection device for an air brake axle assembly.

Background technique

According to the relevant requirements of GB7258 and other standards, the braking performance of the vehicle is put forward, and the axle assembly, as a key component affecting the braking performance of the vehicle, directly restricts the braking performance of the vehicle. However, in the prior art, in the inspection stage of the supporting products of the automobile factory, the inspection of the size and appearance of the axle assembly is mostly carried out. Check online for confirmation. This detection method, once it is found that the brake balance performance does not meet the requirements in actual production, it needs to be checked, adjusted or replaced, and reconfirmed step by step, which seriously affects the production efficiency of the entire vehicle product. This is the weak point of prior art.

Utility model content

The technical problem to be solved by the utility model is to provide a technical solution for the brake balance detection device of the air brake axle assembly in view of the deficiencies of the prior art. The brake balance performance is achieved, and it is easy to use and has strong practicability.

In order to solve the above-mentioned technical problems, the utility model provides the following device for detecting the brake balance of the air brake axle assembly, which includes two brake air chambers and two axle heads of the axle assembly to be tested, and It includes a drive unit for driving the axle head to rotate and an axle head speed detection unit for detecting the axle head speed detection unit. The drive unit and the axle head speed detection unit are respectively connected with a control unit. The control unit is connected with a display unit and an air compressor; the air compressor is connected with a brake main pipeline, the air compressor is located at one end of the brake main pipeline, and the other end of the brake main pipeline respectively passes through the first The brake branch pipeline and the second brake branch pipeline are connected with two brake air chambers, and the cross-sectional areas of the above two brake branch pipelines are equal, and an airflow control valve is arranged on the brake main pipeline.

When in use, the drive unit drives the two axle heads of the axle assembly to be tested to rotate, and the air compressor supplies the brake air source to the two brake air chambers of the axle assembly to be tested at the same time, and brakes the axle heads of the axle. The spindle speed detection unit detects the speed of the two axle spindles of the axle assembly to be tested and transmits it to the control unit. The control unit starts timing while opening the airflow control valve until the speed of the two axle spindles decreases to zero. Through calculation and processing of the control unit, the braking time difference between the axle heads of the two axles is calculated, and the braking time difference is compared with the preset allowable braking time difference range, so as to determine the Whether the brake balance performance is qualified or not, and display the above judgment result on the display unit, and the judgment result is qualified or unqualified.

In addition, the display unit is also used to display the braking time of each axle head of the axle assembly to be tested and the allowable braking time difference range of the two axle heads of the axle assembly to be tested. In addition, the range of the braking time difference between the axle heads of the two axles allowed by the axle assembly to be tested can be reset through the display unit.

Wherein, the axle head rotational speed detection unit adopts two rotational speed sensors, and the rotational speed sensors are respectively connected with the control unit, and the rotational speed sensors are respectively installed on the axle axle heads of the axle assembly to be tested.

Wherein, the drive unit is two motors, the motors are connected to the control unit for signals, and the output ends of the motors are respectively connected to the axle head of the axle assembly to be tested.

Wherein, the airflow control valve is an electric control valve, and the electric control valve is connected with the control unit, so that the automatic control of the airflow control valve is realized through the control unit; and it is convenient for the control unit to start Timing of the braking time of the two axle heads of the axle assembly to be tested respectively.

Wherein, the display unit described in the utility model is a touch screen, which is convenient to use.

Wherein, the control unit adopts a single-chip microcomputer.

Wherein, the utility model also includes a fixing mechanism for supporting and fixing the vehicle axle assembly to be tested. When in use, the vehicle axle assembly can be supported and fixed by the fixing mechanism so that the testing process can be carried out smoothly.

Wherein, the above-mentioned fixing mechanism includes a base, on which two support seats are arranged, and the two support seats are located at both ends of the base, and bolt holes are provided on the support seats, and the installation base of the axle assembly to be tested passes through the above-mentioned The bolt holes are bolted to the support seat.

Compared with the prior art, the utility model can realize the detection of the braking balance of the air brake axle assembly before the vehicle is completed by simulating the braking environment of the vehicle, and has a simple structure, convenient use and strong practicability Simultaneously, the display unit of the present utility model can be used for displaying and resetting the range of the braking time difference of the axle heads of the two axle heads allowed by the axle assembly to be tested, and can reset the braking time difference range according to actual needs during use , wide application range and easy to use.

It can be seen that, compared with the prior art, the utility model has substantive features and progress, and the beneficial effects of its implementation are also obvious.

Description of drawings

Fig. 1 is a functional block diagram of the utility model.

Fig. 2 is a schematic structural diagram of a specific embodiment of the present invention.

Among them, 1 is the base, 2 is the support seat, 3 is the axle assembly to be tested, 4 is the air compressor, 5 is the air flow control valve, 6 is the axle head, 7 is the speed sensor, 8 is the touch screen, 9 is the Motor, 10 is a single-chip microcomputer, 11 is a brake air chamber, 12 is a main brake pipeline, 13 is a first brake branch pipeline, and 14 is a second brake branch pipeline.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figures 1 and 2, a brake balance detection device for a pneumatic brake axle assembly of the present invention includes two brake air chambers 11 of the axle assembly 3 to be tested and two axle The axle head 6 also includes a drive unit for driving the axle head 6 to rotate and an axle head speed detection unit for detecting the speed of the axle head 6. The drive unit and the axle head speed detection unit are respectively It is connected with a control unit, and the control unit is connected with a display unit and an air compressor 4; the air compressor 4 is connected with a brake main pipeline 12, and the air compressor 4 is located at one end of the brake main pipeline 12, The other end of the main brake pipeline 12 is connected to the two brake air chambers 11 through the first brake branch pipeline 13 and the second brake branch pipeline 14 respectively. The cross-sectional area of the two brake branch pipelines is Equally, the air flow control valve 5 is provided on the main brake pipeline 12 .

In the above-mentioned embodiment, the said shaft head rotational speed detection unit adopts two rotational speed sensors 7, and said rotational speed sensors 7 are respectively connected with the control unit, and said rotational speed sensors 7 are respectively installed on the vehicle axle assembly 3 to be tested. On the axle head 6.

In the above embodiment, the drive unit is two motors 9, the motors 9 are connected to the control unit for signals, and the output ends of the motors 9 are connected to the axle head 6 respectively.

In the above embodiment, the airflow control valve 5 is an electric control valve, and the electric control valve is connected with the control unit.

In the above embodiments, the display unit is a touch screen 8 .

In the above embodiments, the control unit adopts the single chip microcomputer 10 .

In the above embodiments, the utility model further includes a fixing mechanism for supporting and fixing the axle assembly 3 to be tested. The fixing mechanism includes a base 1, and the base 1 is provided with two support bases 2, the two support bases 2 are located at both ends of the base 1, and the support base 2 is provided with bolt holes, the axle assembly to be tested The mounting base of 3 is connected with the support base 2 by bolts through the above-mentioned bolt holes.

During use, the vehicle axle assembly 3 to be tested is fixed on the fixing mechanism, the output ends of the two motors 9 are respectively connected to the axle head 6 of the vehicle axle assembly 3 to be tested, and the air compressor 4 is connected to the vehicle axle head 6 to be tested. The two brake air chambers 11 of the tested axle assembly 3 are connected, and the two motors 9 drive the axle head 6 of the tested axle assembly 3 to rotate, and then control the electric control valve to open, and the air compressor 4 will compress the air source Inject the brake air chamber 11 of the axle assembly 3 to be tested, and brake the axle heads 6 of the two axles at the same time. Among them, the axle head speed detection unit collects the speed of the two axle heads 6 and transmits the speed to the control unit. After calculation and processing by the control unit, the actual braking time difference between the two axle heads 6 is calculated, and the actual Compare the braking time difference with the allowable range of the braking time difference between the two axle heads of the axle assembly 3 to be tested, and determine whether the above-mentioned actual time difference falls within the above-mentioned allowable range of the braking time difference between the two axle heads of the two axle heads. Then the judgment result is that the brake balance of the axle assembly 3 to be tested is qualified, otherwise the brake balance of the axle assembly 3 to be tested is unqualified, and the above judgment result is displayed on the display. In summary, the utility model has the advantages of simple structure, convenient use and strong practicability.

In addition, while the control unit opens the airflow control valve 5, it starts to time the braking time of the two axle heads 6 of the axle assembly 3 to be tested respectively. The allowable braking time difference range can be reset through the touch screen, which is convenient to use.

Claims (8)

1. a gas braking axle assembly brake compensation pick-up unit, comprise two brake chambers and two axle tags of axle assembly to be measured, it is characterized in that: also comprise for driving driver element that described axle tag rotates and the spindle nose rotation speed detection unit for detection of described axle tag rotating speed, described driver element is connected with a control module respectively with spindle nose rotation speed detection unit, and described control module is connected with a display unit and an air compressor; Described air compressor is connected with a braking trunk pipeline, air compressor is positioned at one end of braking trunk pipeline, the other end of braking trunk pipeline is connected with two brake chambers with the second braking branch line by the first braking branch line respectively, the cross-sectional area of above-mentioned two braking branch lines is equal, and described braking trunk pipeline is provided with control damper.

2. gas braking axle assembly brake compensation pick-up unit according to claim 1, it is characterized in that: described spindle nose rotation speed detection unit adopts two speed probes, described speed probe is connected with control module respectively, and described speed probe is arranged on respectively on the axle tag of axle assembly to be measured.

3. gas braking axle assembly brake compensation pick-up unit according to claim 1, it is characterized in that: described driver element is two motors, described motor is connected with control module signal, and the output terminal of described motor is connected with the axle tag of axle assembly to be measured respectively.

4. gas braking axle assembly brake compensation pick-up unit according to claim 1, is characterized in that: described control damper is motor-operated control valve, and described motor-operated control valve is connected with control module.

5. gas braking axle assembly brake compensation pick-up unit according to claim 1, is characterized in that: described display unit is touch-screen.

6. according to the gas braking axle assembly brake compensation pick-up unit described in claim 1 or 2 or 3 or 4, it is characterized in that: described control module adopts single-chip microcomputer.

7. according to the gas braking axle assembly brake compensation pick-up unit described in claim 1 or 2 or 3 or 4 or 5, it is characterized in that: also comprise that one for supporting and fix the fixed mechanism of described axle assembly to be measured.

8. gas braking axle assembly brake compensation pick-up unit according to claim 7, it is characterized in that: described fixed mechanism comprises base, base is provided with two supporting seats, two supporting seats are positioned at the two ends of base, and supporting seat is provided with bolt hole, the mounting base of described axle assembly to be measured is connected with described supporting seat bolt by above-mentioned bolt hole.

Images