CN101216375A - Test stand for detecting hub bearing ABS sensor dynamic signal - Google Patents

Abstract

The invention relates to a test platform for detecting dynamic signals of an ABS sensor of hub bearing, which is composed of a pedestal box (1), a frequency-variable motor (2), a separator (3) in the box, a motor fixing board (4), a shaft coupling (5), fastening nuts (6, 10), bearings (7, 12), a transmission shaft (8), a liner (9), a workbench (11), a press cover (13), a bearing inner ring fixing sleeve (14), a bolt (15), a bearing outer ring pressure (18), a cylinder box body (19), a cylinder (20), an electromagnetic reversing valve (21) and an electric control component. A computer controls a cylinder to tightly press the outer ring of the hub bearing (16) and the sensor (17), and the frequency-variable motor drives the transmission shaft to make the inner ring rotate, so that the sensor generates corresponding signals under different rotation speeds. The signals are collected by an industrial computer after filtering and then converted into digital signals by an A/D converter plate. The digital signals are analyzed by the computer to determine whether the signals are qualified, and the program is preset to record the test data.

Description

A kind of testing table of detection wheel hub bearing ABS sensor dynamic signal

Technical field

The invention belongs to the detection technique field, specially refer to a kind of testing table of detection wheel hub bearing ABS sensor dynamic signal.

Background technology

Braking ability is one of automobile main performance, and it is related to travel safety, the stability of direction when the basic index of braking ability of estimating an automobile is braking acceleration, braking distance, braking time and braking.

The stability of direction during braking still can be travelled by the track of the direction of appointment when being meant automobile brake.If because the brake hard of automobile, when especially running at high speed and make the complete locking of wheel, with abnormally dangerous.If the front-wheel locking will make automobile lose steering capability; If whipping or tune, sideslip, sideslip will appear in rear lock, especially under the wet and slippery situation in road surface, traffic safety is caused great harm.

The function of ABS promptly when wheel will locking, reduces damping force; And when wheel can not locking, increase damping force, so perseveration makes braking effect the best.

Abs sensor is integrated on the hub bearing, in have solenoid can produce the magnetic line of force, gear ring is installed on the hub for vehicle wheel, wheel drives gear ring and rotates, the gear ring cutting magnetic line makes the solenoid in the sensor induce exchange current, and its voltage signal size is directly proportional with vehicle wheel rotational speed; The control device of ABS system calculates, analyzes, amplifies and differentiates being installed in the signal that the sensor on each wheel sends back, by output stage command signal is outputed to solenoid valve again, goes to carry out brake pressure adjusting task, thereby makes automobile brake

Still the checkout equipment that does not have at present specialty at home comes the detection wheel hub bearing ABS sensor, and simple pick-up unit can not guarantee the qualification rate of hub bearing abs sensor again.

Summary of the invention

In order to improve the means of detection wheel hub bearing ABS sensor, guarantee the safety in its ex factory pass rate and the guarantee use, the invention provides a kind of testing table of detection wheel hub bearing ABS sensor dynamic signal, this testing table can the detection wheel hub bearing ABS sensor voltage signal, whether and it is qualified to differentiate the voltage signal of tested abs sensor under different rotating speeds, shows by computing machine and judges conclusion.

For achieving the above object, the present invention has adopted following technical scheme:

The testing table of described detection wheel hub bearing ABS sensor dynamic signal is made up of machinery and automatically controlled two parts, wherein

I, mechanical part are made of base cabinet, variable-frequency motor, case internal partition, motor fixing plate, shaft coupling, set nut, bearing, transmission shaft, lining, worktable, gland, bearing inner race fixed cover, bolt, bearing outer ring gland, cylinder casing, cylinder, solenoid directional control valve; The stage casing is provided with the case internal partition in the base cabinet, and fixed electrical machinery fixed head on the case internal partition has vertical variable-frequency motor in the motor fixing plate lower end by bolt; Worktable is set on the base cabinet, lining is placed by worktable central authorities, by upper and lower two angular contact bearings transmission shaft is installed in the lining, bearing in the lining lower end is located by set nut, transmission shaft connects with variable-frequency motor by shaft coupling, its lower end of bearing in the lining upper end is located by set nut, and the upper end is sealed by gland; Be fixed with the cylinder casing on the worktable, cylinder and solenoid directional control valve are set on the cylinder casing, connect the bearing outer ring gland on the output shaft of cylinder, gland is pressed in the outer ring and the cover abs sensor thereon of hub-bearing unit; Transmission shaft upper end coupling bearing inner ring fixed cover, fixed cover is fixed the inner ring of hub-bearing unit on it by bolt.

II, automatically controlled part be by industrial computer, the filtering case, and regulator cubicle is formed, and the ascending, descending of industrial computer and Electric Appliance Cabinet control cylinder piston rod and the startup of variable-frequency motor, stops, and the frequency of control of conversion device is with the control motor speed simultaneously; The filtering case filters the voltage signal that abs sensor produces, and voltage signal enters industrial computer analysis after filtering, shows and stores.

Because adopt aforesaid technical scheme, the present invention has following superiority:

1, use a computer automatically control, cylinder made hold down gag, and be swift to operate simple.

2, the test result calculations machine shows and preserves data, and whether the Automatic Program discriminating sensor is qualified, reduces labor intensity of operating staff.

3, for the hub bearing of different model, only needing to change the inner ring fixed cover and the outer ring fixed cover that cooperate with bearing can detect on this testing table, saves cost.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the system diagram of the automatically controlled part of the present invention.

Among Fig. 1: the 1-base cabinet; The 2-variable-frequency motor; 3-case internal partition; The 4-motor fixing plate; The 5-shaft coupling; 6,10-set nut; 7,12-bearing; The 8-transmission shaft; The 9-lining; The 11-worktable; The 13-gland; 14-bearing inner race fixed cover; The 15-bolt; The 16-hub-bearing unit; The 17-ABS sensor; 18-bearing outer ring gland; 19-cylinder casing; The 20-cylinder; The 21-solenoid directional control valve.

Embodiment

The testing table of detection wheel hub bearing ABS sensor dynamic signal of the present invention is the different rotating speeds when utilizing the real work of mechanical hook-up simulation hub bearing, and detect whether be installed on the voltage signal that the abs sensor on the hub-bearing unit outer ring produces under different rotating speeds qualified, whether satisfy request for utilization, testing result is by Computer Analysis, demonstration and storage.

This testing table mechanical hook-up is as shown in Figure 1: the abs sensor of installing on hub-bearing unit (16) outer ring (17) is a detected object, variable-frequency motor (2) is installed on the motor plate (3), motor plate (3) vertically is installed on base cabinet internal partition (4), can regulate motor plate and adjust the right alignment of motor and transmission shaft (8), variable-frequency motor (2) is connected with transmission shaft (8) by nylon rope shaft coupling (5), lining (9) is installed on worktable (11), transmission shaft (8) is installed in the lining (9), owing to be that complete machine is vertical installation, with angular contact bearing (7), (12) bear the gravity of transmission shaft and other parts and the pressure of cylinder (20), set nut (6), (10) be used for locking bearing, gland (13) is used for compressing bearing (12) outer ring and prevents that dust from entering bearing.Bearing inner race fixed cover (14) is used for fifth wheel hub bearing unit (16) inner ring and transmission shaft (8), cylinder casing (19) is screwed on worktable (11), cylinder (20) and solenoid directional control valve (21) are installed on the cylinder casing (19), solenoid directional control valve (21) control cylinder (20) rises and descends, and cylinder (20) piston rod elongation compression axis bearing outer-ring fixed cover (18) compresses hub bearing (16) outer ring.According to the difference of hub bearing (16) model, only need to change different inner ring fixed cover (14) and outer ring fixed cover (18), reduce cost.

Automatically controlled part is as shown in Figure 2: computing machine at first with inverter communication, the Frequency Converter Control motor rotation is simulated the working order of the bearing under the different speed of a motor vehicle.Computing machine sends instruction makes the elongation of cylinder (20) piston rod compress hub bearing (16) outer ring.When variable-frequency motor (2) drives the rotation of transmission shaft (8) drive hub bearing (16) inner ring, hub bearing (16) outer ring and sensor (17) maintain static, during the hub bearing running, under the different rotating speeds, sensor (17) produces the correspondent voltage signal, the filtering of voltage signal process filtering case is gathered by the industrial computer capture card, and the conversion of process A/D plate is a digital signal with analog signal conversion, enter computing machine and carry out analysis and judgement, program is set qualified voltage in advance, it is qualified to show if the collection voltage signal is qualified, otherwise show defective, and record test data, the test back computing machine that finishes sends instruction and rises for solenoid directional control valve (8) control cylinder (20) piston rod, unload hub bearing (16), get final product.

Claims (1)

1. the testing table of a detection wheel hub bearing ABS sensor dynamic signal is characterized in that: this testing table is made up of machinery and automatically controlled two parts, wherein

I, mechanical part are by being made of base cabinet (1), variable-frequency motor (2), case internal partition (3), motor fixing plate (4), shaft coupling (5), set nut (6,10), bearing (7,12), transmission shaft (8), lining (9), worktable (11), gland (13), bearing inner race fixed cover (14), bolt (15), bearing outer ring gland (18), cylinder casing (19), cylinder (20), solenoid directional control valve (21) and automatically controlled part; The interior stage casing of base cabinet (1) is provided with case internal partition (3), and case internal partition (3) is gone up fixed electrical machinery fixed head (4), by bolt vertical variable-frequency motor (2) is arranged in motor fixing plate (4) lower end; Worktable (11) is set on the base cabinet (1), lining (9) is placed by worktable (11) central authorities, by upper and lower two angular contact bearings (7,12) transmission shaft (8) is installed in the lining (9), bearing (7) in lining (9) lower end is located by set nut (6), transmission shaft (8) connects with variable-frequency motor (2) by shaft coupling (5), its lower end of bearing (12) in lining (9) upper end is by set nut (10) location, and the upper end is sealed by gland (13); Be fixed with cylinder casing (19) on the worktable (11), cylinder (20) and solenoid directional control valve (21) are set on the cylinder casing (19), connect bearing outer ring gland (18) on the output shaft of cylinder (20), gland (18) is pressed in the outer ring and the cover abs sensor (17) thereon of hub-bearing unit (16); Transmission shaft (8) upper end coupling bearing inner ring fixed cover (14), fixed cover (14) is fixed the inner ring of hub-bearing unit (16) on it by bolt (15);

II, automatically controlled part be by industrial computer, the filtering case, and regulator cubicle is formed, and the ascending, descending of industrial computer and Electric Appliance Cabinet control cylinder piston rod and the startup of variable-frequency motor, stops, and the frequency of control of conversion device is with the control motor speed simultaneously; The filtering case filters the voltage signal that abs sensor produces, and voltage signal enters industrial computer analysis after filtering, shows and stores.

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