Test apparatus and system

Abstract

The application relates to the technical field of electronic brake caliper testing, and provides a testing device and system for mechanical efficiency testing of an electronic brake caliper. The testing device comprises a device base, a testing motor, a torque sensor and a motor tool arranged on the device base, and further comprises a rotation angle detection unit and a clamping force detection unit. The rotation angle detection unit is arranged on the testing motor, the torque sensor is connected between the testing motor and the motor tool, the clamping force detection unit is arranged on the electronic brake caliper to be tested, the motor tool is provided with a speed reduction mechanism connected in transmission with the torque sensor, and the power output end of the speed reduction mechanism is adapted to be in transmission connection with the driving structure of a piston in the electronic brake caliper. The application can effectively improve the unstable torque input phenomenon during the mechanical efficiency testing of the electronic brake caliper, effectively reduce the testing error, and help improve the reliability of the mechanical efficiency testing result of the electronic brake caliper.

Description

Technical Field

[0001] This application relates to the field of electronic brake caliper testing technology, and in particular to a testing device and system for testing the mechanical efficiency of electronic brake calipers. Background Technology

[0002] The mechanical efficiency test is mainly to verify whether the correspondence between the motor input torque of the electronic brake caliper and the clamping force formed at the friction pad meets the service brake design requirements.

[0003] Currently, mechanical efficiency testing for electronic brake caliper products typically employs a torque wrench and a force sensor. During testing, the torque from the torque wrench is transmitted to the piston drive structure within the electronic brake caliper. The greater the torque input from the torque wrench, the greater the corresponding clamping force.

[0004] However, since manual torque wrenches cannot precisely control the input torque and have poor stability, they are prone to large errors during testing, which can affect the reliability of the electronic brake caliper mechanical efficiency test results. Utility Model Content

[0005] In view of this, this application aims to provide a testing device to help improve the reliability of test results for the mechanical efficiency of electronic brake calipers.

[0006] To achieve the above objectives, the technical solution of this application is implemented as follows: A testing device for testing the mechanical efficiency of an electronic brake caliper includes a device base, a test motor, a torque sensor and a motor fixture mounted on the device base, and also includes a rotation angle detection unit and a clamping force detection unit. The rotation angle detection unit is located on the test motor and is adapted to detect the rotation angle of the test motor. The torque sensor is connected between the test motor and the motor fixture and is adapted to detect the output torque of the test motor. The clamping force detection unit is located on the electronic brake caliper under test and is adapted to detect the clamping force formed by the friction plate in the electronic brake caliper under test. The motor fixture is adapted to be connected to the electronic brake caliper under test, and the motor fixture has a reduction mechanism that is driven and connected to the torque sensor. The power output end of the reduction mechanism is adapted to be driven and connected to the piston drive structure in the electronic brake caliper.

[0007] Furthermore, the rotation angle detection unit adopts an angle encoder connected to one end of the test motor.

[0008] Furthermore, the torque sensor is connected to the reduction mechanism via a coupling.

[0009] Furthermore, the coupling is a bellows coupling.

[0010] Furthermore, the motor fixture includes a fixture housing suitable for connection to the electronic brake caliper under test, the reduction mechanism is disposed in the fixture housing, and the reduction mechanism is a planetary gear reduction mechanism; The sun gear in the planetary gear reduction mechanism is connected to the coupling via a rotating shaft, and the planet carrier in the planetary gear reduction mechanism is adapted to be connected to the drive structure for transmission.

[0011] Furthermore, the inner wall of the tooling housing is provided with transmission teeth that mesh with the planetary gears in the planetary gear reduction mechanism, and the tooling housing constitutes the gear ring in the planetary gear reduction mechanism.

[0012] Furthermore, a drive shaft is rotatably mounted on the base of the device, and the drive shaft is connected to the coupling via the drive shaft.

[0013] Furthermore, the test motor is connected to one end of the device base, the motor fixture is connected to the other end of the device base relative to the test motor, and the torque sensor and the coupling are located within the device base.

[0014] Furthermore, the test motor is connected to the torque sensor via a torque limiter, which is located within the device substrate.

[0015] Compared with related technologies, this application has the following advantages: The testing apparatus described in this application, by employing the output torque of a test motor and utilizing the detection of a rotation angle detection unit and a torque sensor, can perform feedback control on the output torque of the test motor. This ensures the accuracy of the input torque of the electronic brake caliper during testing, effectively improves the phenomenon of unstable torque input during the mechanical efficiency test of the electronic brake caliper, effectively reduces test errors, and thus helps to improve the reliability of the mechanical efficiency test results of the electronic brake caliper.

[0016] Furthermore, the rotation angle detection unit employs an angle encoder, a mature and easy-to-set technology that enables precise detection of the test motor's rotation angle. The torque sensor is connected to the reduction mechanism via a coupling, facilitating the transmission connection between the reduction mechanism and the torque sensor. The use of a bellows coupling provides advantages such as high transmission sensitivity, vibration absorption, compensation for radial, angular, and axial deviations, torsional rigidity, and identical clockwise and counterclockwise rotation characteristics, ensuring reliable transmission between the torque sensor and the reduction mechanism.

[0017] Furthermore, the reduction mechanism employs a planetary gear reduction mechanism, which offers advantages such as small size, easy layout, high transmission efficiency, wide reduction range, and high precision, ensuring transmission precision while achieving speed reduction. By setting transmission teeth on the inner wall of the tooling housing, the tooling housing constitutes the gear ring in the planetary gear reduction mechanism, simplifying the structure of the motor tooling and reducing tooling costs. The rotation shaft of the sun gear in the reduction mechanism is connected to a coupling via a transmission shaft mounted on the device base, facilitating the transmission connection between the rotation shaft and the coupling.

[0018] Furthermore, the test motor and motor fixture are positioned at opposite ends of the device base, while the torque sensor and coupling are located within the device base, facilitating the arrangement of various test components on the base. The inclusion of a torque limiter prevents torque output from exceeding limits, protecting the torque sensor and the electronic brake caliper under test.

[0019] Another objective of this application is to provide a testing system for testing the mechanical efficiency of an electronic brake caliper, which includes the testing apparatus as described above, and also includes a controller; The controller is connected to the test motor, the torque sensor, the rotation angle detection unit, and the clamping force detection unit, respectively.

[0020] The testing system described in this application, using the aforementioned testing device, can test the mechanical efficiency of electronic brake calipers. It can ensure the accuracy of the input torque of the electronic brake calipers during testing, effectively improve the phenomenon of unstable torque input during the mechanical efficiency test of electronic brake calipers, effectively reduce test errors, and help improve the reliability of the mechanical efficiency test results of electronic brake calipers. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram showing the connection between the test device described in the embodiments of this application and the electronic brake caliper under test; Figure 2 for Figure 1 A schematic diagram of the structure shown from another perspective; Figure 3 for Figure 2 A schematic diagram showing the test device separated from the electronic brake caliper under test. Figure 4 for Figure 3 A schematic diagram of the structure shown from another perspective; Figure 5 This is a schematic diagram of the test device described in the embodiments of this application; Figure 6 This is a schematic diagram of the transmission connection between the reduction mechanism and the coupling described in the embodiments of this application; Figure 7 This is a schematic diagram of the deceleration mechanism described in the embodiment of this application (excluding the gear ring); Figure 8 This is a schematic diagram of the controller connection in the test system described in the embodiments of this application; Explanation of reference numerals in the attached figures: 1. Device base; 2. Test motor; 3. Torque sensor; 4. Motor fixture; 5. Rotation angle detection unit; 6. Clamping force detection unit; 7. Coupling; 8. Drive shaft; 9. Torque limiter; 10. Electronic brake caliper; 11. Mounting base; 12. Controller; 41. Tool housing; 411. Transmission gear; 42. Reduction mechanism; 421. Sun gear; 4211. Center hole; 422. Rotating shaft; 423. Planet carrier; 4231. Central shaft; 4232. Transmission groove; 424. Planet gear; Q. Internal cavity. Detailed Implementation

[0022] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0024] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0026] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0028] An embodiment of the first aspect of this application provides a testing apparatus for testing the mechanical efficiency of an electronic brake caliper 10, and the testing apparatus of this embodiment helps to improve the reliability of the test results of the mechanical efficiency of the electronic brake caliper 10.

[0029] In related technologies, with the development of the automotive industry, electronic brake calipers 10 are becoming increasingly popular due to their advantages such as convenient operation, precise braking force control, high space utilization, and low maintenance costs. During the design process of electronic brake calipers 10, mechanical efficiency testing, as a performance test, is mainly used to verify whether the correspondence between the motor input torque of the electronic brake caliper 10 and the clamping force formed at the friction pads meets the vehicle braking design requirements.

[0030] The magnitude of the input torque of the motor in the electronic brake caliper 10 directly affects the braking effect. A large input torque can easily damage the piston drive structure in the electronic brake caliper 10, while a small input torque will fail to meet the vehicle's braking requirements, resulting in a longer braking distance and compromising driving safety. Therefore, an appropriate input torque is crucial for the electronic brake caliper 10. Testing the mechanical efficiency of the electronic brake caliper 10 can help verify whether it meets the vehicle's braking design requirements.

[0031] Currently, the mechanical efficiency test of electronic brake caliper products of category 10 generally uses a torque wrench and a force sensor. During the test, the electronic brake caliper 10 is fixed on the test fixture, and then the torque wrench is manually operated to transmit the torque of the torque wrench to the piston drive structure in the electronic brake caliper 10. The greater the torque input by the torque wrench, the greater the corresponding clamping force.

[0032] However, using a manual torque wrench to input the test torque results in poor stability because the manual torque wrench cannot precisely control the input torque, which can easily lead to large errors during testing and thus affect the reliability of the mechanical efficiency test results of the electronic brake caliper 10.

[0033] In view of this, in order to overcome the shortcomings of related technologies, the testing device in this embodiment combines... Figures 1 to 7 As shown, in terms of overall design, the testing device includes a device base 1, a test motor 2, a torque sensor 3 and a motor fixture 4 mounted on the device base 1, and also includes a rotation angle detection unit 5 and a clamping force detection unit 6.

[0034] The rotation angle detection unit 5 is located on the test motor 2 and is adapted to detect the rotation angle of the test motor 2. The torque sensor 3 is connected between the test motor 2 and the motor fixture 4 and is adapted to detect the output torque of the test motor 2. The clamping force detection unit 6 is located on the electronic brake caliper 10 under test and is adapted to detect the clamping force formed by the friction plate in the electronic brake caliper 10 under test.

[0035] Furthermore, the aforementioned motor fixture 4 is adapted to be connected to the electronic brake caliper 10 under test, and the motor fixture 4 has a reduction mechanism 42 that is connected to the torque sensor 3. The power output end of the reduction mechanism 42 is adapted to be connected to the drive structure of the piston in the electronic brake caliper 10 so that the piston can be driven to move the friction plate in a straight line through the drive structure.

[0036] Therefore, with the above configuration, by using the output torque of the test motor 2 and utilizing the detection of the rotation angle detection unit 5 and the torque sensor 3, the output torque of the test motor 2 can be controlled by feedback. This embodiment can ensure the accuracy of the input torque of the electronic brake caliper 10 during testing, effectively improve the phenomenon of unstable torque input during the mechanical efficiency test of the electronic brake caliper 10, effectively reduce test errors, and achieve the effect of improving the reliability of the mechanical efficiency test results of the electronic brake caliper 10.

[0037] Based on the above general introduction, specifically in this embodiment, the device base 1 serves as the supporting foundation for each test component in the test device. It is mainly used to realize the orderly arrangement of the test motor 2, torque sensor 3, motor tooling 4, and the electronic brake caliper 10 to be tested, and can connect them together in a transmission manner so as to perform mechanical efficiency testing of the electronic brake caliper 10.

[0038] In practice, it is still as follows Figures 1 to 5As shown, as an exemplary embodiment, the device base 1 may be a hollow box-shaped structure, and the top surface and part of the side surfaces of the device base 1 may be open to facilitate the connection and arrangement of the test components. At the same time, the device base 1 is also provided with several mounting holes, which are typically threaded holes, to achieve the fixed arrangement of components such as the test motor 2, the motor fixture 4, and the electronic brake caliper 10 under test.

[0039] In this embodiment, in some exemplary implementations, the test motor 2 can generally be a servo motor, and the rotation of the test motor 2 is controlled by a corresponding servo controller and servo driver. This allows the use of a servo motor for the test motor 2, which not only achieves high-precision control but also offers advantages such as fast dynamic response and high stability.

[0040] In addition, continue to combine Figures 1 to 5 As shown in this embodiment, in some exemplary implementations, the rotation angle detection unit 5 may, for example, be an angle encoder connected to one end of the test motor 2. Using an angle encoder for the rotation angle detection unit 5 has advantages such as being technically mature, easy to set up, and capable of accurately detecting the rotation angle of the test motor 2.

[0041] In addition, in specific implementation, the clamping force detection unit 6 can generally be a clamping force sensor installed in the electronic brake caliper 10 under test. The clamping force sensor can be any existing sensor that can reliably detect and output the clamping force. In terms of arrangement, the clamping force detection unit 6 is also placed between the friction plates on both sides of the electronic brake caliper 10, so that it can detect the clamping force when the friction plates on both sides move towards each other.

[0042] In this embodiment, in some exemplary implementations, the torque sensor 3 can be connected to the reduction mechanism 42 in the motor fixture 4 via a coupling 7. Thus, by connecting the torque sensor 3 to the reduction mechanism 42 via the coupling 7, it is obviously more convenient to achieve a transmission connection between the reduction mechanism 42 and the torque sensor 3 compared to directly connecting the reduction mechanism 42 to the torque sensor 3.

[0043] In specific implementations, in some exemplary embodiments of this embodiment, the coupling 7 may be a bellows coupling, for example. By using a bellows coupling for the coupling 7, it has advantages such as high transmission sensitivity, ability to absorb vibration, compensation for radial, angular and axial deviations, and torsional rigidity, with identical clockwise and counterclockwise rotation characteristics. At the same time, it can also ensure the reliability of the transmission between the torque sensor 3 and the reduction mechanism 42.

[0044] Of course, in addition to using a bellows coupling, other types of products can also be used for the coupling 7 in specific implementations, as long as they can realize the transmission connection between the reduction mechanism 42 and the torque sensor 3, and have good transmission sensitivity, so as to realize reliable transmission between the torque sensor 3 and the reduction mechanism 42.

[0045] Continue by Figures 3 to 5 and combined Figure 6 and Figure 7 As shown, in some exemplary embodiments of this embodiment, the motor fixture 4 specifically includes a fixture housing 41 adapted to be connected to the electronic brake caliper 10 under test. The aforementioned reduction mechanism 42 is disposed in the inner cavity Q of the fixture housing 41, and the reduction mechanism 42 specifically adopts a planetary gear reduction mechanism.

[0046] Among them, the reduction mechanism 42 adopts a planetary gear reduction mechanism. The sun gear 421 in the planetary gear reduction mechanism is connected to the coupling 7 through the rotating shaft 422. The planet carrier 423 in the planetary gear reduction mechanism serves as the output end and is suitable for transmission connection with the piston drive structure in the electronic brake caliper 10. Each planet gear 424 in the planetary gear reduction mechanism is mounted on the planet carrier 423 through its corresponding central shaft 4231.

[0047] It is understandable that the planetary gear reduction mechanism 42 is adopted because it has advantages such as small size, easy layout, high transmission efficiency, wide reduction range and high precision, and can also ensure the precision of transmission while achieving deceleration.

[0048] Furthermore, it is worth noting that, in specific implementation, given that the main function of the motor fixture 4 is to replace the motor and reduction gear in the electronic brake caliper 10 under test, as well as the transmission structure between them, the gear ratio of the reduction mechanism 42 using the planetary gear reduction mechanism should be the same as the transmission ratio of the original reduction mechanism in the electronic brake caliper 10 under test.

[0049] Meanwhile, the fixture housing 41 in the above-mentioned motor fixture 4 is suitable for connection to the electronic brake caliper 10 under test. That is, the fixture housing 41 can refer to the original motor in the electronic brake caliper 10 under test in terms of structure and connection form, so that the fixture housing 41 can be connected to the basic structure such as the caliper body bracket in the electronic brake caliper 10, and the reduction mechanism 42 in the fixture housing 41 can be connected to the piston drive structure in the electronic brake caliper 10.

[0050] In the electronic brake caliper 10, the piston drive structure is, for example, a ball screw mechanism. In this case, the planetary carrier 423 in the reduction mechanism 42 is connected to the ball screw mechanism. Thus, during testing, the torque output by the test motor 2 is transmitted to the reduction mechanism 42 in the motor fixture 4 via the torque sensor 3 and the coupling 7. The reduction mechanism 42 drives the ball screw mechanism to move, thereby enabling the piston to drive the friction plates in the electronic brake caliper 10, so that the friction plates on both sides move linearly and clamp the clamping force detection unit 6.

[0051] It is worth noting that the aforementioned ball screw mechanism, i.e., the drive structure of the piston in the electronic brake caliper 10 and the transmission connection between the piston and the friction plate, as well as the arrangement of the friction plate in the caliper body of the electronic brake caliper 10, can all be found in the relevant structures of the existing electronic brake caliper 10, and will not be repeated here.

[0052] See also Figure 6 As shown, in some exemplary embodiments of this embodiment, transmission teeth 411 that mesh with planetary gears 424 in a planetary gear reduction mechanism may be provided on the inner wall of the tooling housing 41, i.e., the inner wall of the inner cavity Q, and thereby the tooling housing 41 constitutes a gear ring in the planetary gear reduction mechanism.

[0053] In this way, by setting transmission teeth 411 on the inner wall of the tooling housing 41, and making the tooling housing 41 form the gear ring in the planetary gear reduction mechanism, the structure of the motor tooling 4 can be simplified, which is conducive to reducing the cost of the motor tooling 4.

[0054] In this embodiment, it remains the same. Figure 6 As shown, in some exemplary embodiments, a drive shaft 8 is rotatably mounted on the device base 1, for example, via a mounting base 11. The drive shaft 8 is rotatably mounted on the device base 1, and the rotating shaft 422 in the reduction mechanism 42 is also specifically connected to the coupling 7 via the drive shaft 8.

[0055] It is understandable that by connecting the rotating shaft 422 of the sun gear 421 in the reduction mechanism 42 to the coupling 7 via the transmission shaft 8 set on the device base 1, compared to directly connecting the rotating shaft 422 to the coupling 7, it is easier to realize the transmission connection between the rotating shaft 422 and the coupling 7, which helps to reduce the design and assembly cost of the test device.

[0056] In this embodiment, the device base 1 can adopt a box-shaped structure. In some exemplary embodiments, it continues as follows: Figures 1 to 5As shown, the test motor 2 can be connected to one end of the device base 1, for example, while the motor fixture 4 is connected to the other end of the device base 1 relative to the test motor 2, and the torque sensor 3 and the coupling 7 are located inside the device base 1.

[0057] At this point, the test motor 2 and the motor fixture 4 are respectively located at the two opposite ends of the device base 1, and the torque sensor 3 and the coupling 7 are located inside the device base 1. This obviously facilitates the arrangement of the various test components in the test device on the device base 1.

[0058] Furthermore, in some exemplary embodiments of this embodiment, the following further details are provided: Figures 1 to 5 As shown, the test motor 2 can be connected to the torque sensor 3 via a torque limiter 9, and the torque limiter 9 is also located inside the device base 1.

[0059] The torque limiter 9 mentioned above can be an existing product. By setting the torque limiter 9, it can be understood that it can prevent the torque output of the test motor 2 from exceeding the limit, and can protect the torque sensor 3 and the electronic brake caliper 10 under test, thus helping to ensure the smooth progress of the test process.

[0060] It is worth noting that, regarding the testing device in this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 7 As shown, it may include, for example, a device base 1, a test motor 2, a torque sensor 3 and a motor fixture 4 mounted on the device base 1, as well as a rotation angle detection unit 5 and a clamping force detection unit 6.

[0061] The rotation angle detection unit 5 uses an angle encoder connected to one end of the test motor 2. One end of the torque sensor 3 is connected to the test motor 2 via a torque limiter 9, and the other end of the torque sensor 3 is connected to the reduction mechanism 42 in the motor fixture 4 via a coupling 7. The clamping force detection unit 6 uses a clamping force sensor installed in the electronic brake caliper 10 under test. The reduction mechanism 42 in the motor fixture 4 can be connected to the drive structure of the piston in the electronic brake caliper 10, so that the piston can be driven by the drive structure to drive the friction plate to move linearly, thereby clamping the clamping force detection unit 6.

[0062] Specifically, coupling 7 is a bellows coupling, and motor fixture 4 includes a fixture housing 41 that can be connected to the electronic brake caliper 10 under test. A reduction mechanism 42 is disposed within the inner cavity Q of the fixture housing 41, and the reduction mechanism 42 is specifically a planetary gear reduction mechanism. In this planetary gear reduction mechanism, the rotating shaft 422 of the sun gear 421 is connected to coupling 7 via a transmission shaft 8. Simultaneously, the planet carrier 423 in this planetary gear reduction mechanism serves as the output end and is connected to the piston drive structure in the electronic brake caliper 10.

[0063] In addition, the test motor 2, motor fixture 4 and the electronic brake caliper 10 under test can generally be fixed to the device base 1 by screw connection. The connection between the test motor 2 and the torque limiter 9, the connection between the torque limiter 9 and the torque sensor 3, the connection between the torque sensor 3 and the coupling 7, and the connection between the coupling 7 and the drive shaft 8 can all be connected by the corresponding connection structure on each component.

[0064] Furthermore, the transmission shaft 8 and the rotating shaft 422 can be connected by, for example, through a groove and a protrusion that engage at their ends. The sun gear 421 in the reduction mechanism 2 can be mounted on the end of the rotating shaft 422 through its central hole 4211. At the same time, a transmission groove 4232 can also be provided on the planet carrier 423 to connect the reduction mechanism 42 and the piston drive structure, referencing the connection method between the transmission shaft 8 and the rotating shaft 422.

[0065] In the preferred embodiment of the above testing device, the specific settings and arrangements of the device base 1, test motor 2, torque sensor 3, and motor fixture 4, etc., can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the device base 1, coupling 7, torque limiter 9, and motor fixture 4, etc., can also be referred to the descriptions in the above exemplary embodiments.

[0066] The testing device in this embodiment adopts the above design, which can ensure the accuracy of the input torque of the electronic brake caliper during testing, effectively improve the phenomenon of unstable torque input during the mechanical efficiency test of the electronic brake caliper, effectively reduce test errors, help improve the reliability of the mechanical efficiency test results of the electronic brake caliper, and has good practicality.

[0067] Meanwhile, when the testing device of this embodiment performs the mechanical efficiency test of the electronic brake caliper 10, the specific testing process can be found in the relevant description in the second aspect embodiment below.

[0068] An embodiment of the second aspect of this application provides a testing system for testing the mechanical efficiency of an electronic brake caliper, and the testing system includes the testing apparatus as described in the first aspect embodiment above, and also includes a controller 12.

[0069] Among them, combined Figure 8 As shown, the controller 12 is connected to the test motor 2, torque sensor 3, rotation angle detection unit 5 and clamping force detection unit 6 respectively.

[0070] In practical implementation, the controller 12 can be, for example, a computer or industrial control computer. The controller 12 is connected to the test motor 2, torque sensor 3, rotation angle detection unit 5, and clamping force detection unit 6 via appropriate electrical connection structures. Furthermore, since the test motor 2 is a servo motor, the rotation angle detection unit 5, which uses an angle encoder, can be connected to a servo controller so that the test motor 2 can be controlled to rotate via a servo driver under the control of the controller 12. In addition, to achieve signal transmission between the torque sensor 3 and the clamping force detection unit 6 and the controller 12, a corresponding data acquisition card can be provided to reliably transmit the detection signals from the torque sensor 3 and the clamping force detection unit 6 to the controller 12.

[0071] In this embodiment, when testing the mechanical efficiency of the electronic brake caliper 10, the testing device is first assembled, and the electronic brake caliper 10 to be tested, with the motor and reduction mechanism (and the transmission structure between them) removed, is installed on the device base 1 and connected to the motor fixture 4. Then, the test motor 2, torque sensor 3, rotation angle detection unit 5, and clamping force detection unit 6 are electrically connected to the controller 12.

[0072] Next, the controller 12, according to the set parameter requirements, causes the test motor 2 to start rotating, driving the reduction mechanism 42 in the motor fixture 4 to rotate as well. The reduction mechanism 42 then drives the piston in the electronic brake caliper 10 under test to move the friction plate until the friction plate clamps the clamping force detection unit 6 located in the electronic brake caliper 10 under test. During the test, the rotation angle detection unit 5 collects the rotation angle of the test motor 2 and controls the rotation speed of the test motor 2. At the same time, the torque sensor 3 and the clamping force detection unit 6 collect the test torque and the corresponding clamping force, respectively.

[0073] By testing the clamping force under different input torques (e.g., 0.2 Nm, 0.4 Nm, 0.6 Nm, 0.8 Nm, 1.0 Nm, 1.2 Nm, etc.), and based on the linear relationship between clamping force and input torque, the controller 12 can substitute the collected data into the mechanical efficiency calculation formula and generate corresponding test results. Simultaneously, based on the clamping force corresponding to different input torques, the controller 12 can also output graphs for technicians to analyze the performance of the electronic brake caliper 10 under test.

[0074] The mechanical efficiency calculation formula is η=(FP / 2πTi)*100%, where parameter F is the clamping force collected by clamping force detection unit 6, parameter T is the torque collected by torque sensor 3, parameter P is the ball screw pitch of the piston drive structure (ball screw mechanism) in the electronic brake caliper 10 under test, and parameter i is the gear transmission ratio in reduction mechanism 42. Parameters P and i are determined by the structural design of the electronic brake caliper 10 under test and can be directly substituted into the formula.

[0075] The testing system of this embodiment, by employing the testing device described above, can test the mechanical efficiency of the electronic brake caliper 10, and can ensure the accuracy of the input torque of the electronic brake caliper 10 during the test. It can effectively improve the phenomenon of unstable torque input during the mechanical efficiency test of the electronic brake caliper 10, effectively reduce test errors, and help improve the reliability of the mechanical efficiency test results of the electronic brake caliper 10.

[0076] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A testing device for testing the mechanical efficiency of an electronic brake caliper (10), characterized in that: It includes a device base (1), a test motor (2), a torque sensor (3) and a motor fixture (4) mounted on the device base (1), and also includes a rotation angle detection unit (5) and a clamping force detection unit (6). The rotation angle detection unit (5) is located on the test motor (2) and is adapted to detect the rotation angle of the test motor (2). The torque sensor (3) is connected between the test motor (2) and the motor fixture (4) and is adapted to detect the output torque of the test motor (2). The clamping force detection unit (6) is located on the electronic brake caliper (10) under test and is adapted to detect the clamping force formed by the friction plate in the electronic brake caliper (10) under test. The motor fixture (4) is adapted to be connected to the electronic brake caliper (10) under test, and the motor fixture (4) has a reduction mechanism (42) that is connected to the torque sensor (3) in a transmission. The power output end of the reduction mechanism (42) is adapted to be connected to the driving structure of the piston in the electronic brake caliper (10) in a transmission.

2. The testing apparatus according to claim 1, characterized in that: The rotation angle detection unit (5) uses an angle encoder connected to one end of the test motor (2).

3. The testing apparatus according to claim 1 or 2, characterized in that: The torque sensor (3) is connected to the reduction mechanism (42) via a coupling (7).

4. The testing apparatus according to claim 3, characterized in that: The coupling (7) is a bellows coupling.

5. The testing apparatus according to claim 3, characterized in that: The motor fixture (4) includes a fixture housing (41) suitable for connection to the electronic brake caliper (10) under test, the deceleration mechanism (42) is disposed in the fixture housing (41), and the deceleration mechanism (42) adopts a planetary gear deceleration mechanism; The sun gear (421) in the planetary gear reduction mechanism is connected to the coupling (7) via a rotating shaft (422), and the planet carrier (423) in the planetary gear reduction mechanism is adapted to be connected to the drive structure for transmission.

6. The testing apparatus according to claim 5, characterized in that: The inner wall of the tooling housing (41) is provided with transmission teeth (411) that mesh with the planetary gears (424) in the planetary gear reduction mechanism, and the tooling housing (41) constitutes the gear ring in the planetary gear reduction mechanism.

7. The testing apparatus according to claim 5, characterized in that: The device base (1) is rotatably provided with a transmission shaft (8), and the rotating shaft (422) is connected to the coupling (7) through the transmission shaft (8).

8. The testing apparatus according to claim 3, characterized in that: The test motor (2) is connected to one end of the device base (1), the motor fixture (4) is connected to the other end of the device base (1) relative to the test motor (2), and the torque sensor (3) and the coupling (7) are located inside the device base (1).

9. The testing apparatus according to claim 8, characterized in that: The test motor (2) is connected to the torque sensor (3) via a torque limiter (9), which is located inside the device base (1).

10. A testing system for testing the mechanical efficiency of an electronic brake caliper, characterized in that: The test apparatus comprising any one of claims 1 to 9 further comprises a controller (12). The controller (12) is connected to the test motor (2), the torque sensor (3), the rotation angle detection unit (5), and the clamping force detection unit (6), respectively.

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