Test bench for clamping characteristic of electronic mechanical brake device

Abstract

The utility model relates to an electronic mechanical brake device clamping characteristic test bench comprising a bench bottom plate, and EMB calipers are arranged on the bench bottom plate; displacement detection devices are arranged on the two sides of the EMB calipers; the laser displacement sensor is arranged on the L-shaped mounting bracket, and the L-shaped mounting bracket is connected with the sliding block; a U-shaped guide groove is formed in the L-shaped mounting bracket in the vertical direction, and the sliding block is arranged in the U-shaped guide groove; the sliding block is connected with the rectangular hole through a butterfly bolt and a butterfly nut; and the pressure sensor is connected with the rack bottom plate through a pressure sensor bracket. The clamping characteristic test bench for the electronic mechanical brake device is used for testing the clamping force of the calipers and the deformation of different parts of the calipers along with time, can reflect the relation of the clamping force-deformation-current-voltage-time and carry out data analysis, and is simple in structure, small in size, convenient to carry, low in manufacturing cost, good in expansibility and convenient to popularize and use. The application range is wide.

Description

Technical Field

[0001] The utility model relates to a detection device, specifically to a test bench for clamping characteristics of an electro-mechanical braking device. Background Art

[0002] With the continuous recognition and development of EMB (Electric Mechanical Brake) technology in the industry, the demand for performance detection of EMB products has also increased significantly. Among them, the clamping characteristic test of EMB is an important part of EMB-related tests.

[0003] Existing test benches for braking clamping characteristics are basically heavy, occupy a large space, generally require at least 5 square meters of area, weigh > 500 kg, have a high cost, and can only be arranged in factory-type land. And there is a lack of a dedicated test bench for clamping characteristics for testing and analyzing the relationship between EMB clamping force - deformation - current - voltage - time. Summary of the Utility Model

[0004] Aiming at the above deficiencies in the prior art, the utility model provides a test bench for clamping characteristics of an electro-mechanical braking device with simple structure, convenient operation, small floor area, low cost, and comprehensive test range.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A test bench for clamping characteristics of an electro-mechanical braking device, comprising: a bench bottom plate, and a bracket adapter plate is arranged in the middle of the bench bottom plate;

[0007] The EMB caliper assembly is arranged on the bracket adapter plate;

[0008] Displacement detection devices are arranged on both sides of the EMB caliper assembly;

[0009] The displacement detection devices include an outer friction plate backplate displacement detection device A arranged on the left side, a caliper housing power head displacement device B and an inner friction plate backplate displacement detection device C arranged on the right side;

[0010] The displacement detection devices include laser displacement sensors, and the laser displacement sensors are arranged on L-shaped mounting brackets, and the L-shaped mounting brackets are connected to sliders;

[0011] The sliders are arranged on adjustable-height brackets;

[0012] The adjustable-height brackets are provided with U-shaped guide grooves in the vertical direction, and the sliders are arranged in the U-shaped guide grooves;

[0013] Rectangular holes are arranged at the bottom of the U-shaped guide grooves;

[0014] The slider is connected to the rectangular hole through a wing bolt and a wing nut;

[0015] The EMB caliper assembly includes an outer friction plate and an inner friction plate;

[0016] A pressure sensor is arranged between the outer friction plate and the inner friction plate;

[0017] The pressure sensor is connected to the bench base plate through a pressure sensor bracket.

[0018] Preferably, the outer friction plate back plate displacement detection device A is used to measure the displacement of the outer friction plate back plate.

[0019] Preferably, the caliper housing power head displacement device B on the right side is used to measure the displacement on one side of the caliper housing power head.

[0020] Preferably, the inner friction plate back plate displacement detection device C is used to measure the displacement of the inner friction plate back plate.

[0021] Preferably, a V-shaped groove is arranged at the top of the pressure sensor bracket, and the pressure sensor is arranged in the V-shaped groove.

[0022] The beneficial effects of the present utility model compared with the prior art:

[0023] The clamping characteristic test bench of the electro-mechanical braking device of the present utility model is used to measure the clamping force of the caliper, the deformation of different parts of the caliper, and the change relationship with time, and can reflect the relationship among the clamping force - deformation - current - voltage - time, and conduct data analysis. It has a simple structure, small size, convenient to carry, low manufacturing cost, good scalability, and wide application range. Description of the Drawings

[0024] Figure 1 is the side view three-dimensional structure schematic diagram of the clamping characteristic test bench of the electro-mechanical braking device of the present utility model;

[0025] Figure 2 is the bench three-dimensional structure schematic diagram of the clamping characteristic test bench of the electro-mechanical braking device of the present utility model;

[0026] Figure 3 is the exploded structure schematic diagram of the clamping characteristic test bench of the electro-mechanical braking device of the present utility model;

[0027] Figure 4 is the bench sectional structure schematic diagram of the clamping characteristic test bench of the electro-mechanical braking device of the present utility model;

[0028] Figure 5 is the bench top view structure schematic diagram of the clamping characteristic test bench of the electro-mechanical braking device of the present utility model;

[0029] Figure 6It is a schematic three-dimensional structure diagram of the test bench for the clamping characteristics of the electro-mechanical braking device of the present utility model;

[0030] Figure 7 It is a schematic connection diagram of the pressure sensor and the mounting bracket of the test bench for the clamping characteristics of the electro-mechanical braking device of the present utility model;

[0031] Figure 8 It is a schematic structural diagram of the bracket adapter plate of the EMB caliper bracket of the test bench for the clamping characteristics of the electro-mechanical braking device of the present utility model.

[0032] Figure 9 It is a schematic three-dimensional structure diagram of the EMB caliper of the test bench for the clamping characteristics of the electro-mechanical braking device of the present utility model;

[0033] Figure 10 It is a schematic cross-sectional structure diagram of the EMB of the test bench for the clamping characteristics of the electro-mechanical braking device of the present utility model;

[0034] Figure 11 It is a schematic diagram of the laser displacement sensor - adjustable height module of the test bench for the clamping characteristics of the electro-mechanical braking device of the present utility model. Specific embodiments

[0035] The present utility model will be described in detail with reference to the accompanying drawings and embodiments as follows:

[0036] Appendix Figure 6 In it, 6-1 is the bench bottom plate, 6-2 is the connecting plate, and 6-3 is the countersunk head screw;

[0037] Appendix Figure 7 In it, 7-1 is the pressure sensor, and 7-2 is the pressure sensor bracket;

[0038] Appendix Figure 8 In it, 8-1 is the hexagon socket head cap screw, and 8-2 is the bracket adapter plate;

[0039] Appendix Figures 1 - 11 It can be seen that a test bench for the clamping characteristics of an electro-mechanical braking device includes: a bench bottom plate 1, and a bracket adapter plate 2 is arranged in the middle of the bench bottom plate 1;

[0040] The EMB caliper assembly 4 is arranged on the bracket adapter plate 2;

[0041] Displacement detection devices are arranged on both sides of the EMB caliper assembly;

[0042] The displacement detection devices include an outer friction plate backplate displacement detection device A arranged on the left side, a caliper housing power head displacement device B and an inner friction plate backplate displacement detection device C arranged on the right side;

[0043] The displacement detection device includes a laser displacement sensor 11-1, which is arranged on an L-shaped mounting bracket 11-2. The L-shaped mounting bracket 11-2 is connected to a slider 11-3;

[0044] The slider 11-3 is arranged on an adjustable-height bracket 11-5;

[0045] The adjustable-height bracket 11-5 is provided with a U-shaped guiding groove in the vertical direction, and the slider 11-3 is arranged in the U-shaped guiding groove;

[0046] A rectangular hole is arranged at the bottom of the U-shaped guiding groove;

[0047] The slider is connected to the rectangular hole through a wing bolt and a wing nut 11-4;

[0048] The EMB caliper assembly includes an outer friction plate 7 and an inner friction plate 8;

[0049] A pressure sensor 7-1 is arranged between the outer friction plate and the inner friction plate;

[0050] The pressure sensor is connected to the bench bottom plate 1 through a pressure sensor bracket 7-2.

[0051] Preferably, the outer friction plate backplate displacement detection device A is used to measure the displacement Δ2 of the outer friction plate backplate.

[0052] Preferably, the caliper housing power head displacement device B on the right side is used to measure the displacement Δ3 on one side of the caliper housing power head.

[0053] Preferably, the inner friction plate backplate displacement detection device C is used to measure the displacement Δ1 of the inner friction plate backplate.

[0054] Preferably, a V-shaped groove is arranged at the top of the pressure sensor bracket, and the pressure sensor is arranged in the V-shaped groove.

[0055] The pressure sensor bracket holds up the pressure sensor so that it remains in the middle of the friction plate without falling. The bracket and the pressure sensor cooperate to form a force-measuring analog brake disc.

[0056] The pressure sensor is connected to an adapter (amplifier), and the wire is led out from the side along the bracket supporting surface. The pressure sensor bracket is connected to the bottom plate with bolts and is provided with U-shaped slot holes, which can be longitudinally adjusted within a certain range.

[0057] The EMB caliper actuator includes a caliper housing 9-1, a caliper bracket 9-2, a power unit and two guide pins 9-3. The EMB caliper bracket is fixed to the bracket adapter plate 2 through 2 bolts 1. The bracket adapter plate 2 is connected to the bottom plate with socket head cap screws. The bracket is provided with U-shaped slot holes, which can be longitudinally adjusted within a certain range.

[0058] Brief description of the working principle of EMB:

[0059] The power of the motor 9-5 is transmitted to the piston 9-4 through the speed reducer 9-6. The piston 9-4 moves to the left, pushing the internal friction plate to move to the left, realizing the clamping of the pressure sensor.

[0060] The motor 9-5 and the speed reducer 9-6 are collectively called the "power unit".

[0061] Steps of the test bench for the clamping characteristics of the electromechanical braking device:

[0062] 1. Build the test bench according to the figures shown above.

[0063] 2. Place the external equipment of the test bench and connect it to the motor, sensors, etc. on the test bench.

[0064] 3. Start the sensors and acquisition equipment.

[0065] 4. Control the EMB motor to perform the clamping operation.

[0066] 5. After the work is completed, the motor rotation angle returns to the initial state, and various collected data is exported.

[0067] 6. Analyze the collected data through a computer.

[0068] The test bench for the clamping characteristics of the electromechanical braking device of the present utility model is used to measure the clamping force of the caliper, the deformation of different parts of the caliper, and the change relationship over time, and can reflect the relationship among clamping force - deformation - current - voltage - time, and perform data analysis. It has a simple structure, small size, convenient to carry, low manufacturing cost, good expandability, and wide application range.

[0069] Main functions of the test bench for the clamping characteristics of the electromechanical braking device of the present utility model:

[0070] 1. Observe the relationship between caliper deformation - pressure and perform curve analysis;

[0071] 2. Observe the change of deformation of different parts of the caliper over time and analyze its change relationship;

[0072] 3. Measure the response time and stabilization time of the clamping force to different target values;

[0073] 4. Measure the response time of the clamping force to achieve ABS reciprocating adjustment;

[0074] 5. Calibrate the relationship between current / voltage / pressure of the EMB caliper actuator;

[0075] 6. Calibrate the pressure sensor integrated in the EMB itself.

[0076] Regarding the deformation / pressure curve, it is divided into three stages:

[0077] 1) The displacement Δ1 of the backplate of the internal friction plate - first fast movement during the idle stroke and then slow movement during the clamping stroke;

[0078] 2) The displacement Δ2 of the backplate of the external friction plate - first stationary and then fast movement during the idle stroke (after the inner friction plate contacts the pressure sensor), and then slow movement during the clamping stroke;

[0079] 3) The displacement Δ3 of the outer end face of the power unit of the caliper housing - first stationary and then fast movement during the idle stroke (after the inner friction plate contacts the pressure sensor), and then slow movement during the clamping stroke;

[0080] Several main displacement parameters will be used as the objects of data analysis later, and their relational expressions are:

[0081] Total caliper deformation = Δ3 - Δ2

[0082] Piston stroke = Δ1 + Δ3

[0083] Total friction plate deformation = Δ1 + Δ2

[0084] Piston stroke = Total friction plate deformation + Total caliper deformation

[0085] The units of Δ1, Δ2, and Δ3 are mm.

[0086] Components placed independently outside the test bench:

[0087] Mobile power supply: Adjustable from 12 to 48V, with a maximum power of 1KW, providing power for the operation of sensors, collectors, EMB calipers, and controllers;

[0088] High-precision pressure sensor amplifier: Stabilizing and amplifying the signals of pressure sensors;

[0089] Signal collector: Summarizing and collecting the signals of high-precision pressure sensors, laser displacement sensors, temperature sensors, and the current / voltage / parking state / caliper internal pressure sensing signals of the measured EMB caliper actuator;

[0090] Measured EMB caliper controller: Controlling the operation of the EMB caliper actuator and providing the current / voltage / parking state / caliper internal pressure sensing signals to the signal collector;

[0091] Observation laptop: Connecting to the collector and observing the change relationships of various signals through the interface of the programmed test software.

[0092] The test bench can be quickly disassembled and assembled and loaded into a trolley case. The sizes when placed in the trolley case have been considered during the component selection. The inner lining of the trolley case: Isolating and protecting, damping and shock-resistant; Different components are placed in different areas.

[0093] The clamping characteristic test bench of the electro-mechanical braking device of the utility model is used to detect the relationship among the clamping force, deformation, current, voltage and time of the EMB, as well as the data analysis of related parameters; the pressure sensor is used as an analog brake disc, which can measure the deformation of different parts and conduct various correlation combinations of the measured quantities of the sensor; the combination of the pressure-laser displacement sensor; the components of the deformation are measured by 3 laser displacement sensors, and then the different target displacement parameters are obtained by summation; the modular bottom plate and connection scheme are adopted; the pressure sensor bracket / caliper bracket adapter plate structure with adjustable horizontal position; the laser displacement sensor module with adjustable height position / horizontal position; the components are easy to disassemble and assemble and can be put into a trolley case to realize a portable test bench.

[0094] Term definition or noun explanation

[0095] EMB: Electrical Mechanical Braking, electro-mechanical braking.

[0096] The above are only the preferred embodiments of the utility model, and do not impose any formal restrictions on the structure of the utility model. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model all fall within the scope of the technical solution of the utility model.

Claims

1. A test bench for clamping characteristics of an electromechanical brake device, characterized in that: include: A stand bottom plate (1), wherein a bracket adapter plate (2) is arranged in the middle of the stand bottom plate (1); The EMB caliper assembly (4) is arranged on the bracket adapter plate (2); Displacement detection devices are provided on both sides of the EMB caliper assembly; The displacement detection device comprises an outer friction plate back plate displacement detection device (A) arranged on the left side, a caliper housing power head displacement device (B) and an inner friction plate back plate displacement detection device (C) arranged on the right side; The displacement detection device comprises a laser displacement sensor (11-1), wherein the laser displacement sensor is arranged on an L-shaped mounting bracket (11-2), and the L-shaped mounting bracket (11-2) is connected to a sliding block (11-3); The slider (11-3) is arranged on the height-adjustable bracket (11-5); The height-adjustable bracket (11-5) is provided with a U-shaped guide groove along the vertical direction, and the sliding block (11-3) is arranged in the U-shaped guide groove; A rectangular hole is provided at the bottom of the U-shaped guide groove; The slide block is connected to the rectangular hole through a butterfly bolt and a butterfly nut (11-4); The EMB caliper assembly comprises an outer friction plate (7) and an inner friction plate (8); A pressure sensor (7-1) is provided between the outer friction plate and the inner friction plate; The pressure sensor is connected to the bench bottom plate (1) via a pressure sensor bracket (7-2).

2. The clamping characteristic test bench of the electromechanical brake device according to claim 1, characterized in that: The outer friction plate back plate displacement detection device (A) is used to measure the outer friction plate back plate displacement (Δ2).

3. The clamping characteristic test bench of the electromechanical brake device according to claim 1, characterized in that: The caliper housing power head displacement device (B) on the right is used to measure the displacement (Δ3) of one side of the caliper housing power head.

4. The electromechanical brake device clamping characteristic test bench according to claim 1, characterized in that: The inner friction plate back plate displacement detection device (C) is used to measure the inner friction plate back plate displacement (Δ1).

5. The clamping characteristic test bench of the electromechanical brake device according to claim 1, characterized in that: A V-shaped groove is arranged on the top of the pressure sensor bracket, and the pressure sensor is arranged in the V-shaped groove.

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