Large-scale testing device for comprehensive performance of drum brake

Abstract

The utility model discloses a large-scale testing device for comprehensive performance of a drum brake, which relates to the technical field of brake testing and comprises a direct-current motor, a torque and rotating speed sensor, a speed reducer and a brake to be tested. A direct-current motor base heightening structure is arranged between the direct-current motor and the direct-current motor base, the direct-current motor is in transmission connection with the torque and rotating speed sensor through a motor sensor coupling, and the torque and rotating speed sensor is in transmission connection with the speed reducer through a sensor speed reducer coupling. The speed reducer and the brake to be tested are in transmission connection through a ZL type elastic coupling, and one side of the direct current motor is provided with a power distribution cabinet. The brake performance testing device can be adapted to brakes of different specifications, and is matched with a data acquisition system, so that synchronous and accurate measurement of multiple parameters is realized, the problems of limited adjustment range, low testing efficiency and inaccurate data acquisition of traditional equipment are solved, and the comprehensiveness and reliability of brake performance testing are improved.

Description

Technical Field

[0001] This utility model relates to the field of brake testing technology, and in particular to a large-scale testing device for the comprehensive performance of drum brakes. Background Technology

[0002] Braking is a technical process that uses artificial resistance or inhibition to decelerate, stop, or maintain a stationary state of a moving object. In the field of mechanical engineering, braking systems are key safety components for various vehicles and industrial equipment. Current mainstream braking technology primarily utilizes brakes, whose braking performance is mainly affected by two key parameters: first, the normal pressure applied by the brake to the friction pair (such as brake pads / discs) and the resulting frictional torque; and second, the actuation stroke of the braking actuator (i.e., the effective displacement distance between the braking end and the friction surface). These two parameters directly determine the dynamic response characteristics, braking efficiency, and thermal load distribution of the braking system.

[0003] Existing brake testing equipment suffers from several technical limitations: First, its mechanical adjustment range is narrow, making it difficult to cover the size and specifications of different brake models; second, the installation and positioning system lacks precision, resulting in time-consuming and labor-intensive centering adjustments with poor repeatability; more importantly, existing equipment lacks modular design, making it unable to quickly adapt to the testing needs of different brake specifications. Regarding testing performance, traditional equipment suffers from a low dynamic data acquisition frequency, leading to measurement errors in key parameters such as braking torque and friction coefficient, affecting the accuracy of multi-parameter correlation analysis. Furthermore, under continuous braking conditions, the cooling system of existing equipment has insufficient heat exchange efficiency, resulting in severely distorted test data under high-temperature conditions. This further restricts the accuracy and reliability of brake performance evaluation.

[0004] To address the aforementioned problems, this utility model proposes a large-scale testing device for the comprehensive performance of drum brakes. Utility Model Content

[0005] To address the problems existing in the background technology, this utility model proposes a large-scale test device for the comprehensive performance of drum brakes.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a large-scale testing device for the comprehensive performance of a drum brake, comprising a DC motor, a torque and speed sensor, a reducer, and a brake under test. The DC motor is mounted on a DC motor base, and a DC motor base elevation structure is provided between the DC motor and the DC motor base. The DC motor and the torque and speed sensor are connected by a motor-sensor coupling, and the torque and speed sensor and the reducer are connected by a sensor-reducer coupling. The reducer and the brake under test are connected by a ZL-type flexible coupling. A power distribution cabinet is provided on one side of the DC motor, and a controllable speed adjustment device is provided inside the power distribution cabinet to adjust the output torque of the DC motor.

[0007] The present invention is further configured such that the DC motor base heightening structure is composed of multiple detachable steel pads stacked together, with a single layer of pad thickness of 40mm, and adjacent pads are connected by high-strength bolts, with a total height adjustment range of 120-360mm.

[0008] The present invention is further configured such that the elastic body of the ZL type flexible coupling is made of a composite material of nitrile rubber and aramid fiber, with an axial compensation of ±4mm and an angular compensation of ±1.5°.

[0009] The present invention is further configured such that the power distribution cabinet integrates a data acquisition and analysis system, which is connected to a torque and speed sensor via an RS485 interface and can synchronously acquire braking torque, speed, and power parameters.

[0010] The present invention is further configured such that the mounting base of the brake under test is provided with a servo electric lifting platform with a lifting stroke of 300-600mm, and the surface of the servo electric lifting platform is arranged with equally spaced matrix threaded mounting holes.

[0011] The present invention is further configured such that the data acquisition and analysis system is also connected to an infrared temperature sensor, which is mounted on the brake pads of the brake under test via a bracket, for real-time monitoring of the operating temperature of the brake under test and generating a temperature rise curve.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This large-scale comprehensive performance testing device for drum brakes consists of a DC motor, torque and speed sensors, a reducer, the brake under test, and a coupling. It is equipped with a servo electric lifting platform, a DC motor base elevation structure, a data acquisition system, and a circulating water cooling system. During operation, the operator first adjusts the lifting platform to center and fix the brake, then adjusts the DC motor output torque using a setting knob to drive the system rotation. During braking, the torque and speed sensors and infrared temperature sensors collect data in real time, and the water cooling system controls the temperature. It is adaptable to brakes of different specifications and, in conjunction with the data acquisition system, achieves simultaneous and accurate measurement of multiple parameters. This solves the problems of limited adjustment range, low testing efficiency, and inaccurate data acquisition associated with traditional equipment, thus improving the comprehensiveness and reliability of brake performance testing. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial structural diagram of the present invention;

[0017] Figure 3 This utility model Figure 2 Enlarged diagram of point A in the middle.

[0018] Reference numerals in the attached drawings: 1. DC motor base; 2. DC motor base raising structure; 3. DC motor; 4. Motor sensor coupling; 5. Torque and speed sensor; 6. Sensor reducer coupling; 7. Reducer; 8. ZL type flexible coupling; 9. Brake under test; 13. Infrared temperature sensor; 14. Bracket; 15. Servo electric lifting platform; 16. Steel pad. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0021] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0022] Please see Figure 1-3 This utility model provides a technical solution: a large-scale test device for the comprehensive performance of a drum brake, including a DC motor 3, a torque and speed sensor 5, a reducer 7 and a brake to be tested 9, wherein the DC motor 3 is mounted on a DC motor base 1.

[0023] A DC motor base raising structure 2 is provided between the DC motor 3 and the DC motor base 1. Specifically, the DC motor base raising structure 2 is composed of multiple detachable steel pads 16 stacked together. The thickness of a single pad is 40mm. Adjacent pads are connected by high-strength bolts. The total height adjustment range is 120-360mm.

[0024] The DC motor 3 is connected to the torque and speed sensor 5 via a motor-sensor coupling 4, and the torque and speed sensor 5 is connected to the reducer 7 via a sensor-reducer coupling 6.

[0025] The reducer 7 and the brake under test 9 are connected by a ZL type flexible coupling 8. Specifically, the elastic body of the ZL type flexible coupling 8 is made of a composite material of nitrile rubber and aramid fiber, with an axial compensation of ±4mm and an angular compensation of ±1.5°.

[0026] Specifically, the bottom of the brake under test 9 is provided with a mounting base, and the mounting base is provided with a servo electric lifting platform 15 with a lifting stroke of 300-600mm. The surface of the servo electric lifting platform 15 is arranged with equally spaced matrix-type threaded mounting holes.

[0027] A power distribution cabinet is installed on one side of the DC motor 3. The cabinet contains a controllable speed control device used to adjust the output torque of the DC motor 3. Specifically, the power distribution cabinet integrates a data acquisition and analysis system. This system is connected to the torque and speed sensor 5 via an RS485 interface, and can synchronously collect braking torque, speed, and power parameters.

[0028] Furthermore, the data acquisition and analysis system is also connected to an infrared temperature sensor 13, which is mounted on the brake shoes of the brake under test 9 via a bracket 14, for real-time monitoring of the operating temperature of the brake under test 9 and generating a temperature rise curve.

[0029] In another embodiment, a circulating water cooling system is also provided on the mounting base of the brake under test 9, including an annular cooling water pipe, a circulating water pump and a radiator (not shown in the figure) arranged around the brake under test 9, and the gap between the annular cooling water pipe and the brake under test 9 is adjustable.

[0030] Working principle:

[0031] At the start of the test, the operator first adjusted the installation height of the brake 9 under test using the servo electric lifting platform 15, so that it was precisely aligned with the output shaft of the reducer 7, and fixed it to the matrix threaded mounting hole with bolts.

[0032] The DC motor 3 drives the brake 9 under test to rotate through a transmission system consisting of a motor sensor coupling 4, a sensor reducer coupling 6, and a ZL-type flexible coupling 8. During transmission, the axial and angular compensation capabilities of the ZL-type flexible coupling 8 effectively absorb vibrations caused by installation errors. During the test, the operator sets the target torque value using the torque setting knob in the distribution cabinet. The controllable speed regulation device precisely adjusts the output torque of the DC motor 3 according to the set signal to simulate load conditions under different working conditions.

[0033] When the brakes begin to operate, torque and speed sensor 5 monitors the torque and speed parameters of the transmission system in real time. The data acquisition system synchronously records braking torque, speed, and power data via an RS485 interface at a sampling frequency of 200Hz. Simultaneously, infrared temperature sensor 13 continuously monitors the surface temperature changes of the brake pads, generating a temperature rise curve. During continuous braking tests, the circulating water cooling system controls the brake temperature by adjusting the distance between the annular cooling water pipe and the brake drum (adjustable from 5-15mm). When the braking torque exceeds the set torque, the system automatically records the dynamic characteristics during braking; when the braking torque is lower than the set torque, the continuous operating performance of the brakes can be tested.

[0034] The motor mounting height can be adjusted (within the range of 120-360mm) using the DC motor base heightening structure 2, adapting to the testing requirements of brakes of different specifications. Through an integrated data acquisition system and adjustable mechanical structure, this device achieves accurate testing of comprehensive parameters such as static braking torque, dynamic braking performance, and thermal fade characteristics of the brake. The testing process can simulate various operating conditions without changing equipment.

[0035] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A large-scale test device for the comprehensive performance of a drum brake, comprising a DC motor (3), a torque and speed sensor (5), a reducer (7), and a brake under test (9), wherein the DC motor (3) is mounted on a DC motor base (1), characterized in that: A DC motor base raising structure (2) is provided between the DC motor (3) and the DC motor base (1). The DC motor (3) and the torque and speed sensor (5) are connected by a motor sensor coupling (4). The torque and speed sensor (5) and the reducer (7) are connected by a sensor reducer coupling (6). The reducer (7) and the brake to be tested (9) are connected by a ZL type flexible coupling (8). A power distribution cabinet is provided on one side of the DC motor (3). A controllable speed adjustment device is provided in the power distribution cabinet. The controllable speed adjustment device is used to adjust the output torque of the DC motor (3).

2. The large-scale testing device for the comprehensive performance of a drum brake according to claim 1, characterized in that: The DC motor base heightening structure (2) is composed of multiple detachable steel pads (16) stacked together. The thickness of a single pad is 40mm. Adjacent pads are connected by high-strength bolts. The total height adjustment range is 120-360mm.

3. The drum brake comprehensive performance large-scale test device according to claim 1, characterized in that: The elastic body of the ZL type flexible coupling (8) is made of a composite material of nitrile rubber and aramid fiber, with an axial compensation of ±4mm and an angular compensation of ±1.5°.

4. The large-scale testing device for the comprehensive performance of a drum brake according to claim 1, characterized in that: The power distribution cabinet is equipped with a data acquisition and analysis system. This system is connected to the torque and speed sensor (5) via an RS485 interface and can synchronously acquire braking torque, speed and power parameters.

5. The large-scale testing device for the comprehensive performance of drum brakes according to claim 1, characterized in that: The mounting base of the brake under test (9) is provided with a servo electric lifting platform (15) with a lifting stroke of 300-600mm. The surface of the servo electric lifting platform (15) is arranged with equally spaced matrix threaded mounting holes.

6. The large-scale testing device for the comprehensive performance of drum brakes according to claim 4, characterized in that: The data acquisition and analysis system is also connected to an infrared temperature sensor (13). The infrared temperature sensor (13) is installed above the brake shoes of the brake under test (9) via a bracket (14) to monitor the working temperature of the brake under test (9) in real time and generate a temperature rise curve.

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