Testing apparatus for accurately testing static braking torque of brake

Abstract

The present invention provides a testing apparatus for accurately testing static braking torque of a brake. By providing an adjustable extension rod, a torque and rotational speed sensor and a photoelectric rotary encoder, the testing apparatus for accurately testing static braking torque of a brake effectively solves the problems of inaccurate force application, poor stroke adaptability of electric cylinders and insufficient experimental accuracy caused by lack of data comparison in existing static braking torque tests of brakes, provides a strong guarantee for accurately testing static braking torque of brakes, helps to improve the performance testing level of brakes, and provides an accurate data support for product quality control and research and development decisions in related industries.

Description

An apparatus for accurately testing the static braking torque of a brake. Technical Field

[0001] This invention relates to the field of torque testing technology, and in particular to a device for accurately testing the static braking torque of a brake. Background Technology

[0002] In the static braking torque test, accurate measurement is crucial to control the length of the lever arm. During typical testing, the lever arm length is usually kept constant to avoid errors in the calculation results due to lever arm variations. Currently common methods for applying external force include stacking, hydraulic, and electric cylinder methods. The following problems exist with current methods of applying external force:

[0003] 1. The hydraulic method has poor accuracy, resulting in large testing errors in industries such as electronic equipment manufacturing and precision instrument testing.

[0004] 2. In the electric cylinder method experiment, different models of electric cylinders correspond to different stroke distances. If the stroke is too short, it cannot meet the movement requirements of the equipment. Changing the electric cylinder model is necessary, increasing the complexity and cost of the test.

[0005] 3. The testing process lacked comparison of data from both ends. Summary of the Invention

[0006] The purpose of this invention is to provide an apparatus for accurately testing the static braking torque of a brake, thereby solving the problems existing in the current static braking torque testing.

[0007] This invention provides an apparatus for accurately testing the static braking torque of a brake, comprising a frame, a worktable mounted on the upper end of the frame, a support plate mounted on the worktable, a transition connecting plate mounted on the support plate, a torque-speed sensor mounted on one side of the transition connecting plate, a torque evaluation unit mounted below the torque-speed sensor, a coupling connected to the torque-speed sensor, a main shaft connected to the coupling, a photoelectric rotary encoder mounted at the end of the main shaft, a swing arm connected to the main shaft, an adjustable extension rod rotatably connected to the lower end of the swing arm, a tension sensor mounted at one end of the adjustable extension rod, an electric cylinder connected to the tension sensor, and a control assembly. One end of the main shaft is connected to the torque-speed sensor via the coupling, and the other end is connected to the photoelectric rotary encoder. The tension sensor is mounted on the front end of the electric cylinder and connected to the adjustable extension rod via a connecting shaft. The other end of the adjustable extension rod is connected to the swing arm.

[0008] The aforementioned device for accurately testing the static braking torque of brakes, by incorporating an adjustable extension rod, a torque and speed sensor, and a photoelectric rotary encoder, effectively solves the problems of inaccurate force application, poor adaptability of electric cylinder stroke, and insufficient experimental accuracy due to lack of data comparison in existing brake static braking torque testing. It provides a strong guarantee for accurately testing the static braking torque of brakes, helps improve the performance testing level of brakes, and provides accurate data support for product quality control and R&D decisions in related industries.

[0009] Furthermore, the control components include an electrical control box and control buttons and a display screen connected to the electrical control box.

[0010] Furthermore, the upper end of the support plate is provided with an outer cover, and the upper end of the outer cover is provided with a cover plate. The torque speed sensor, the torque evaluation unit, the main shaft and the photoelectric rotary encoder are all located inside the outer cover.

[0011] Furthermore, the upper end of the frame is provided with a first platform and a second platform, and the support plate is disposed on the first platform.

[0012] Furthermore, an installation guide plate is provided on the upper side of the first platform.

[0013] Furthermore, a walking assembly is provided at the lower end of the frame.

[0014] Furthermore, the walking component comprises multiple ferrules.

[0015] Furthermore, the spindle is fixed to the worktable by a bearing mounting mechanism.

[0016] Furthermore, the bearing mounting mechanism includes two spaced-apart support seats and two bearing seats mounted on the two support seats.

[0017] Furthermore, the electric cylinder is mounted on the frame via a push rod base. Attached Figure Description

[0018] Figure 1 is a three-dimensional structural diagram of the device for accurately testing the static braking torque of a brake according to the first embodiment of the present invention from a first perspective.

[0019] Figure 2 is a three-dimensional structural diagram of the device for accurately testing the static braking torque of a brake according to the first embodiment of the present invention from a second perspective.

[0020] Figure 3 is a three-dimensional structural diagram of the device for accurately testing the static braking torque of a brake according to the second embodiment of the present invention from a first perspective.

[0021] Explanation of key component symbols:

[0022] Frame 10 Coupling 70 Push Rod Base 131 Worktable 20 Spindle 80 Control Components 140 First Platform 21 Support Base 81 Electrical Control Box 141 Second Platform 22 Bearing Seat 82 Control Buttons 142 Guide Plate 23 Photoelectric Rotary Encoder 90 Display Screen 143 Support Plate 30 Swing Arm 100 Outer Cover 150 Transition Connecting Plate 40 Adjustable Extension Rod 110 Cover Plate 160 Torque and Speed ​​Sensor 50 Tension Sensor 120 Brake 170 Torque Evaluation Unit 60 Electric Cylinder 130 Travel Components 180

[0023] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0024] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0025] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Please refer to Figures 1 to 3. An embodiment of the present invention provides an apparatus for accurately testing the static braking torque of a brake, comprising a frame 10, a worktable 20 disposed on the upper end of the frame 10, a support plate 30 disposed on the worktable 20, a transition connecting plate 40 disposed on the support plate 30, a torque-speed sensor 50 disposed on one side of the transition connecting plate 40, a torque evaluation unit 60 disposed below the torque-speed sensor 50, a coupling 70 connected to the torque-speed sensor 50, a main shaft 80 connected to the coupling 70, and a photoelectric rotary encoder 9 disposed at the end of the main shaft 80. 0. A swing arm 100 connected to the main shaft, an adjustable extension rod 110 rotatably connected to the lower end of the swing arm 100, a tension sensor 120 disposed at one end of the adjustable extension rod 110, an electric cylinder 130 connected to the tension sensor 120, and a control assembly 140. One end of the main shaft 80 is connected to the torque and speed sensor 50 through the coupling 70, and the other end is connected to the photoelectric rotary encoder 90. The tension sensor 120 is installed at the front end of the electric cylinder 130 and connected to the adjustable extension rod 110 through a connecting shaft. The other end of the adjustable extension rod 110 is connected to the swing arm 100.

[0028] The frame 10 serves as the basic support structure for the entire device, providing a stable platform for the components above. The workbench 20 is located at the top of the frame 10, upon which a support plate 30 is placed, further supporting subsequent critical testing components. A transition plate 40, located on the support plate 30, serves as a connection and transition, facilitating the installation of subsequent components. A torque and speed sensor 50 is mounted on one side of the transition plate 30, used to accurately measure the torque and speed information of relevant components. A torque evaluation unit 60 is located below it, capable of analyzing and evaluating the measured torque data. A coupling 70 is connected to the torque and speed sensor 50, and the main shaft 80 is connected to it via the coupling 70. The other end of the main shaft 80 is connected to a photoelectric rotary encoder 90, which accurately monitors the rotation of the main shaft 80. The swing arm 100 is connected to the main shaft 80, and its lower end is rotatably connected to the adjustable extension rod 110. One end of the adjustable extension rod 110 is equipped with a tension sensor 120, which is connected to an electric cylinder 130. The electric cylinder 130 provides tension, and the tension sensor 120 accurately measures the tension value. Through the coordinated action of these components, the static braking torque of the brake is accurately tested. In addition, the device is equipped with a control component 140 for controlling the entire testing process and displaying data.

[0029] The aforementioned device for accurately testing the static braking torque of brakes, by incorporating an adjustable extension rod 110, a torque and speed sensor 50, and a photoelectric rotary encoder 90, effectively solves the problems of inaccurate force application, poor adaptability of electric cylinder stroke, and insufficient experimental accuracy due to lack of data comparison in existing brake static braking torque testing. It provides a strong guarantee for accurately testing the static braking torque of brakes, helps improve the performance testing level of brakes, and provides accurate data support for product quality control and R&D decision-making in related industries.

[0030] In one embodiment of the present invention, the control component 140 includes an electrical control box 141 and control buttons 142 and a display screen 143 connected to the electrical control box 141. The electrical control box 141 may be a PLC controller for controlling the operation of various electrical devices in the device. The display screen 143 is used to display the control status.

[0031] In one embodiment of the present invention, the upper end of the support plate 30 is further provided with an outer cover 150, and the upper end of the outer cover 150 is provided with a cover plate 160. The torque speed sensor 50, the torque evaluation unit 60, the main shaft 80 and the photoelectric rotary encoder 90 are all disposed inside the outer cover 150.

[0032] In one embodiment of the present invention, the upper end of the frame 10 is provided with a first platform 21 and a second platform 22, and the support plate 30 is disposed on the first platform 21. A guide plate 23 is respectively provided on the upper side of the first platform 21. The first platform 21 is used to install two guide plates 23, which are symmetrical from left to right. A support plate 30 is installed at the center. The brake 170 is connected to the support plate 30 through a transition connecting plate 40. The second platform 22 has the main shaft 80 fixed on the workbench 20 by a bearing mounting mechanism. The bearing mounting mechanism includes two support seats 81, on which two bearing seats 82 are installed. A main shaft 80 is installed in the middle. The center of the main shaft 80 is perpendicular to the ground and a swing arm 100 is installed, which passes through the opening of the table of the second platform 22. One end of the main shaft 80 is connected to the torque and speed sensor 50 through a coupling 70. A torque evaluation unit 60 is installed below the torque and speed sensor 50 and connected to the brake 170 through the coupling 70. A photoelectric rotary encoder 90 is installed at the other end of the main shaft 80. Finally, an outer cover 150 is installed, and a cover plate 160 is installed on the top of the outer cover 150.

[0033] In one embodiment of the present invention, a walking assembly 180 is provided at the lower end of the frame 10. Specifically, in this embodiment of the present invention, the walking assembly 180 consists of four casters.

[0034] In one embodiment of the present invention, the electric cylinder 130 is mounted on the frame 10 via a push rod base 131.

[0035] During the test preparation process, the first step is to conduct an equipment integrity check. Carefully confirm that all components are complete and undamaged or missing. Simultaneously, focus on checking the tightness of connections between components, including the connection between the brake 170 and the transition connecting plate 40, the support plate 30, and the installation of the electric cylinder 130 with the push rod base 131, the tension sensor 120, the adjustable extension rod 110, and the swing arm 100. If the electric cylinder 130 has a short stroke, the adjustable extension rod 110 is not required; if the electric cylinder 130 has a long stroke, install the adjustable extension rod 110 first, then horizontally install the electric cylinder 130 onto the frame 10 to ensure the equipment will not cause errors in subsequent tests. Next, open the electrical control box 141 door and connect the equipment to the power supply, ensuring stable power-on and proper grounding.

[0036] After inspection, the test device is installed, mainly by mounting the brake under test onto the support plate 30. The brake under test 170 is securely mounted at the center of the support plate 30 via the transition connecting plate 40. Then, pre-test settings are performed to confirm that the torque-speed sensor 50, torque evaluation unit 60, photoelectric rotary encoder 90, and tension sensor 120 are functioning normally and without fault displays. The connection lines of each sensor are also checked for correctness. The required test parameters, such as the test torque range, speed, and loading speed, are set using the control button 142 and display screen 143. Precise settings according to specific test requirements are then required to begin the test.

[0037] After the equipment is started, the electric cylinder 130 is fixed to the frame 10 via the push rod base 131 and begins to work, applying force to the swing arm 100 through the tension sensor 120 and the adjustable extension rod 110. During the test, the torque and speed sensor 50 collects the torque and speed data of the brake in real time and transmits them to the torque evaluation unit 60 for analysis and processing; the photoelectric rotary encoder 90 records the rotation angle and speed of the brake; the tension sensor 120 measures the magnitude of the tension applied by the electric cylinder 130 for subsequent data comparison. The tester needs to closely observe the data displayed on the display screen 143 and pay attention to the operating status of the equipment, such as any abnormal noise, vibration, or overheating, in order to promptly identify problems and take appropriate measures.

[0038] After the test is completed, press the stop button to stop the equipment from running. The electric cylinder 130 stops applying force, and the brake 170 also stops working. Next, read and record the test result data displayed on the screen 143, including the brake's static braking torque, speed, rotation angle, and other information. At the same time, compare and analyze the data from the tension sensor 120 to further confirm the accuracy of the test results. Then, further analyze and process the collected data to generate a test report. Finally, remove the brake 170 under test, clean the support plate 30 and transition connection plate 40, check for wear or damage to various parts of the equipment, and repair or replace them in a timely manner if necessary. Close the door of the electrical control box 141, tidy up the working environment around the equipment, and prepare for the next use.

[0039] Specifically, in this embodiment of the invention, the calculation methods for the conversion between static braking torque, torque and shear stress, and tension and torque are as follows:

[0040] Calculation of static braking torque

[0041] The static braking torque can be calculated using the torque data collected by the torque-speed sensor (6). If the torque is known to be... (Unit: Newton-meter), lever arm length is (Unit: meters), then the static braking torque = .

[0042] (1)

[0043] Conversion calculation of moment and shear stress

[0044] If the torque is known to be (Unit: Newton-meter), the distance from any point on the circumferential cross-section to the center of the circle is... (Unit: ) meters. For a solid circular cross-section, its diameter is... (Unit: meters), polar moment of inertia of solid circular cross section.

[0045] (2)

[0046] Then the shear stress at any point on the circumferential cross section.

[0047] (3)

[0048] Formula for calculating the maximum shear stress of a solid circular cross-section:

[0049] If the torque is known to be (Unit: Newton-meter), diameter of solid circular cross-section is (Unit: meters), then the distance from the edge of the solid circular cross-section to the center of the circle is: (Unit: meters), torsional section modulus.

[0050] (4)

[0051] Maximum shear stress in a solid circular cross-section.

[0052] (5)

[0053] In a solid circular cross section, the shear stress is the greatest at the edge. Substituting the distance at the edge into the shear stress formula at any point yields the formula for the maximum shear stress. The torsional section modulus reflects the ability of a solid circular cross section to resist torsional deformation.

[0054] Formula for calculating the polar moment of inertia of a hollow circular cross-section:

[0055] If the outer diameter of the hollow circular cross-section is known to be... (Unit: meters), inner diameter is (Unit: meters), then the polar moment of inertia of the hollow circular cross section.

[0056] (6)

[0057] This formula is obtained by calculating the moment of inertia of the hollow circular cross section relative to the center of the circle, taking into account the influence of the hollow part on the moment of inertia.

[0058] Formula for calculating the maximum shear stress of a hollow circular cross-section:

[0059] If the torque is known to be (Unit: Newton-meter), outer diameter of hollow circular cross-section is (Unit: meters), inner diameter is (Unit: meters), then the distance from the outer edge of the hollow circular cross-section to the center of the circle is... (Unit: meters), Polar moment of inertia of hollow circular cross-section,

[0060] (7)

[0061] Torsional section modulus

[0062] (8)

[0063] in The maximum shear stress of a hollow circular cross-section.

[0064] (9)

[0065] In a hollow circular cross-section, the shear stress is greatest at the outer edge. The formula for the maximum shear stress is obtained by substituting the polar moment of inertia formula for a hollow circular cross-section. The torsional section modulus reflects the degree of hollowness of the hollow circular cross-section. When approaching A greater degree of hollowness reduces the torsional section modulus and increases the maximum shear stress.

[0066] Conversion calculation between tension and torque

[0067] The tension applied by the electric cylinder (20) is measured by the tension sensor (19). (Unit: Newtons), the distance from the connection point of the adjustable extension rod (15) and the swing arm (14) to the center of rotation of the brake is... (Unit: meter). At this time, the torque generated by the tension... = .

[0068] (11)

[0069] Calculations related to rotational speed and rotational angle (if necessary)

[0070] The photoelectric rotary encoder (10) records the rotation angle θ (unit: radians) and rotational speed ω (unit: radians / second) of the brake. If the rotation angle θ within time t (unit: seconds) is known, then the average rotational speed is... = .

[0071] (12)

[0072] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

An apparatus for accurately testing the static braking torque of a brake, comprising a frame and a worktable disposed at the upper end of the frame, characterized in that... It also includes a support plate on the workbench, a transition connecting plate on the support plate, a torque and speed sensor on one side of the transition connecting plate, a torque evaluation unit on the lower side of the torque and speed sensor, a coupling connected to the torque and speed sensor, a main shaft connected to the coupling, a photoelectric rotary encoder at the end of the main shaft, a swing arm connected to the main shaft, an adjustable extension rod rotatably connected to the lower end of the swing arm, a tension sensor at one end of the adjustable extension rod, an electric cylinder connected to the tension sensor, and a control assembly. One end of the main shaft is connected to the torque and speed sensor through the coupling, and the other end is connected to the photoelectric rotary encoder. The tension sensor is installed at the front end of the electric cylinder and connected to the adjustable extension rod through a connecting shaft. The other end of the adjustable extension rod is connected to the swing arm. The apparatus for accurately testing the static braking torque of a brake according to claim 1 is characterized in that, The control components include an electrical control box and control buttons and a display screen connected to the electrical control box. The apparatus for accurately testing the static braking torque of a brake according to claim 1 is characterized in that, The upper end of the support plate is also provided with an outer cover, and the upper end of the outer cover is provided with a cover plate. The torque speed sensor, the torque evaluation unit, the main shaft and the photoelectric rotary encoder are all located inside the outer cover. The apparatus for accurately testing the static braking torque of a brake according to claim 1 is characterized in that, The upper end of the frame is provided with a first platform and a second platform, and the support plate is provided on the first platform. The apparatus for accurately testing the static braking torque of a brake according to claim 4 is characterized in that, Each of the first platforms has an installation guide plate on its upper side. The apparatus for accurately testing the static braking torque of a brake according to claim 1 is characterized in that, The lower end of the frame is equipped with a walking assembly. The apparatus for accurately testing the static braking torque of a brake according to claim 6 is characterized in that, The walking assembly consists of multiple ferrules. The apparatus for accurately testing the static braking torque of a brake according to claim 1 is characterized in that, The spindle is fixed to the worktable by a bearing mounting mechanism. The apparatus for accurately testing the static braking torque of a brake according to claim 8 is characterized in that, The bearing mounting mechanism includes two spaced-apart support seats and two bearing seats mounted on the two support seats. The apparatus for accurately testing the static braking torque of a brake according to claim 1 is characterized in that, The electric cylinder is mounted on the frame via a push rod base.

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