A brake caliper testing apparatus

Abstract

This application discloses a brake caliper testing device, relating to the field of testing equipment technology. It includes a support device, a limiting device, and a testing device. The support device includes a base and a bracket; the limiting device is mounted on the bracket and includes a first positioning mechanism with a horizontal first moving trajectory and a second positioning mechanism with a vertical second moving trajectory. Both are connected to the horizontal and vertical positioning parts of the caliper under test, respectively, fixing the caliper in a test posture consistent with actual operation. The testing device includes a sliding mechanism, a third positioning mechanism, and a sensor assembly mounted on the base. The sliding mechanism and the third positioning mechanism each have a fourth and a third moving trajectory parallel to the first and second moving trajectories, respectively, used to drive the sensor assembly to move and accurately position it at the caliper in the test posture for testing. This application relies on bidirectional independent multi-axis motion coordination to achieve realistic simulation of the testing posture and high-precision sensor alignment, improving the compatibility of the equipment.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a brake caliper testing device. Background Technology

[0002] As a core component of the braking system of rail vehicles, the stable performance of brake calipers is crucial to driving safety. Therefore, performance testing is required for them, whether at the factory or after maintenance. Typically, such testing equipment needs to be capable of performing functions such as installing and fixing the brake calipers, measuring displacement, and measuring load.

[0003] In existing technologies, there are two main approaches to testing brake calipers. One approach involves providing a test bench with fixed units to mount the caliper under test and equip it with a movable simulated brake disc for load measurement. However, the installation and testing mechanisms of this type of test bench lack coordinated adjustment capabilities, requiring the replacement of specialized tooling when adapting to different caliper specifications. The other approach focuses on the measuring tool itself, such as a force measuring mechanism suspended between brake pad supports by ropes, which passively adapts to the position of the test piece through its own oscillation.

[0004] However, the aforementioned existing technical solutions have fundamental flaws in achieving testing compatibility. The core issue lies in the fact that the installation and testing components of the equipment are two independent, functionally fixed systems, lacking a unified, collaboratively adjustable platform. When faced with brake calipers of different specifications, relying solely on unilateral adjustments or passive adaptation cannot guarantee the accuracy of installation positioning and the precision of the testing process, resulting in low testing efficiency and limited applicability. Therefore, how to solve the compatibility problem with brake calipers of different specifications is a pressing technical challenge in this field. Summary of the Invention

[0005] Based on the technical shortcomings of existing brake caliper installation limiters, which lack adjustment capabilities and cannot adapt to different product specifications, and the fact that dynamic shaking and rotation of the test piece in external testing mode can seriously interfere with test accuracy, this application aims to provide a brake caliper testing device. By adopting a design that integrates a limit unit with multi-dimensional adjustment devices on a bracket, a displacement testing section connected to the brake pad support, and a load testing section set between the brake pad supports, the entire brake caliper testing device can universally adapt to different brake caliper specifications. The directly connected displacement testing section effectively eliminates the interference of the test piece's running shaking on displacement detection, achieving high-precision and high-repeatability integrated displacement and load detection, and significantly improving the reliability and safety of brake caliper performance testing.

[0006] To achieve the above objectives, this application provides a brake caliper testing device, comprising: Support device, including base and bracket fixed on base; The limiting device is mounted on the bracket; the limiting device is equipped with the brake caliper to be tested. The limiting device includes: The first positioning mechanism has a first moving trajectory along a horizontal direction parallel to the base and is connected to the horizontal positioning part of the brake caliper. The second positioning mechanism has a second moving trajectory along a vertical direction perpendicular to the base and is connected to the vertical positioning part of the brake caliper. The detection device includes: The sensor assembly has two sensors that detect the brake calipers; A third positioning mechanism is connected to a sensor assembly; the third positioning mechanism has a third movement trajectory parallel to the second movement trajectory; A sliding mechanism is connected to the base, and a third positioning mechanism is mounted on the sliding mechanism; the sliding mechanism has a fourth moving trajectory parallel to the first moving trajectory; The first and second positioning mechanisms fix the attitude and position of the brake caliper so that the brake caliper is in a preset test attitude consistent with the actual working state; the third positioning mechanism and the sliding mechanism are used to drive the sensor assembly to move so that the sensor assembly is positioned at the brake caliper in the test attitude for detection.

[0007] The technical solution of this application solves the problems of poor versatility and frequent tooling changes in existing testing equipment by setting up a limiting device and a detection device with independent movement trajectories. The limiting device connects to the brake caliper through first and second positioning mechanisms that move horizontally and vertically, fixing it in a test posture consistent with the actual working state. The detection device drives the sensor assembly to move through a sliding mechanism and a third positioning mechanism, actively aligning it with the fixed brake caliper. This system achieves self-adaptation to brake calipers of different shapes, sizes, and interface specifications through the bidirectional cooperation of caliper posture fixation and sensor spatial movement, improving the testing compatibility of the equipment.

[0008] In some embodiments of this application, it also includes: An opening and closing mechanism is provided on the first positioning mechanism, and the opening and closing mechanism has two relatively movable mounting parts, each mounting part having a mounting hole; the horizontal positioning part is connected to the mounting part by fasteners passing through the mounting holes. Among them, the first positioning mechanism, the second positioning mechanism, the opening and closing mechanism, and the third positioning mechanism are all driven by a lead screw mechanism.

[0009] This application achieves flexible adjustment of the horizontal width by adding an opening and closing mechanism consisting of two relatively movable mounting parts to the first positioning mechanism, thus solving the problem of adapting the positioning spacing of different models of clamps. By using a lead screw mechanism to drive each positioning and opening and closing action, the high precision and self-locking characteristics of the lead screw ensure the positioning accuracy and the structural stability under test conditions.

[0010] In some embodiments of this application, the brake caliper includes two opposing brake pad supports; The detection device also includes: The displacement testing mechanism includes two conforming plates that are rigidly connected to the brake pad support respectively, and a guide mechanism disposed between the two conforming plates to constrain the two brake pad supports to maintain relative parallel movement. Among the two sensors in the sensor assembly, at least one is a displacement sensor. The displacement sensor is connected to the contour plate and is used to measure the displacement of the brake caliper by moving the contour plate synchronously with the brake pad.

[0011] This application adds a displacement testing mechanism to the detection device, and utilizes the rigid connection between the profile plate and the brake pad support under test, as well as the geometric constraint of the guide mechanism on the relative parallel movement of the two profile plates, to ensure that the displacement sensor can move synchronously and stably with the profile plate. This solves the error caused by the shaking of the measured part in traditional non-contact measurement, and realizes high-precision follow-up measurement of the brake pad support displacement.

[0012] In some embodiments of this application, each contour plate is provided with a rotatable dovetail piece; the brake caliper is provided with a dovetail groove that matches the dovetail piece, and the dovetail piece is engaged in the dovetail groove to achieve a fixed connection between the contour plate and the brake pad support.

[0013] This application achieves rapid installation and zero-gap rigid fixation of the profile plate by setting a rotatable dovetail piece on the profile plate and utilizing its rotational engagement with the original dovetail groove of the brake pad support. This structure avoids damage to the test piece and ensures that the inner side of the profile plate is tightly pressed against the brake pad support over a large area, providing a stable measurement reference for the displacement sensor and improving the test accuracy.

[0014] In some embodiments of this application, the detection device further includes: The load testing mechanism includes a force measuring base, which is connected to a third positioning mechanism and is positioned between two opposing brake pad supports. Another sensor in the sensor assembly is a force sensor, which is integrated on the force measuring base and is used to measure the output load of the brake caliper when the brake caliper clamps the force measuring base.

[0015] This application, by configuring a load testing mechanism in the testing device and directly integrating the force sensor onto the force measuring base, ensures that the clamps can directly apply braking force to the force measuring base during testing. This design enables the force sensor to capture the actual clamping load via the shortest path, avoiding mechanical losses and signal attenuation caused by external intermediate tooling, and ensuring the accuracy of the load test data.

[0016] In some embodiments of this application, the limiting device further includes: The crossbeam has a first positioning mechanism mounted on a first mounting surface and a second positioning mechanism mounted on a second mounting surface adjacent to the first mounting surface; the limiting device is hung on the bracket via the crossbeam.

[0017] This application ensures that the movement of the two positioning mechanisms does not interfere with each other by arranging the first positioning mechanism and the second positioning mechanism on two adjacent mounting surfaces of the crossbeam; at the same time, the limiting device is hung on the bracket with the crossbeam as the whole force-bearing component, which optimizes the load transmission path and improves the overall structural rigidity of the equipment.

[0018] In some embodiments of this application, the hanger consists of two support columns fixed to the base, and the crossbeam of the limiting device is mounted on top of the two support columns.

[0019] This application constructs a stable portal frame support structure by using two support columns fixed to the base to form a bracket, and placing a crossbeam on top of the support columns. This design places the support points at both ends of the crossbeam to reduce the load-bearing bending moment, while the vertical support columns form a short-path force transmission channel, ensuring that the load above can be directly and stably transferred to the base, thus improving the load-bearing stability of the equipment.

[0020] In some embodiments of this application, the top of the support column is provided with a groove, and both ends of the crossbeam are provided with bosses with convex wedge surfaces; the bosses at both ends of the crossbeam are respectively fitted into the corresponding grooves.

[0021] This application sets a groove at the top of the support column and sets a boss with a convex wedge surface at both ends of the crossbeam. By using the wedge-shaped guide cooperation between the boss and the groove, the horizontal deviation of the crossbeam can be automatically adjusted when it is lowered and erected. This achieves rapid self-centering alignment of the limiting device and restricts the translational freedom after assembly, thus ensuring the spatial position stability of the limiting reference.

[0022] In some embodiments of this application, the sliding mechanism includes: The guide assembly is mounted on the base of the support device; A sliding load-bearing component is mounted on a guide component at the bottom and has a bracket at the top. A drive adjustment assembly is connected to a sliding load-bearing assembly; the drive adjustment assembly includes a cylinder unit for driving the sliding load-bearing assembly to move along a guide assembly, and a lead screw unit for adjusting and locking the position of the sliding load-bearing assembly. The third positioning mechanism is mounted on the bracket.

[0023] This application achieves dual-mode drive by incorporating a cylinder unit and a lead screw unit connecting the load-bearing component in the sliding mechanism. The cylinder unit drives the sliding load-bearing component to move rapidly over a long stroke, shortening the test auxiliary time; the lead screw unit performs fine-tuning and self-locking as it approaches the target, ensuring precise locking of the sensor component after it reaches its position and eliminating position drift during the test.

[0024] In some embodiments of this application, the support device further includes: Several casters are installed at the bottom of the support device base, and each caster is integrated with an adjustable support foot. The casters are used to move the testing equipment, and the support foot extends downward after the testing equipment is moved to the predetermined position to fix and level the equipment.

[0025] This application integrates casters with adjustable height support feet at the bottom of the support device, ensuring convenient omnidirectional movement of large, heavy-duty testing equipment within the testing site. After the equipment is in place, the casters are suspended by extending the support feet downwards, eliminating roller clearance interference and compensating for uneven ground to level the equipment, thus ensuring the benchmark stability of the precision testing environment.

[0026] Compared with the prior art, the beneficial effects of this application are as follows: 1. Resolves the contradiction between compatibility and attitude simulation: Compared with the technical defects of existing technologies that use fixed tooling leading to poor compatibility or use universal clamps but cannot guarantee the true installation attitude, this invention sets up a bidirectional adjustable limit device and a detection device, uses multi-point rigid connection to reproduce the installation state of the brake caliper on the vehicle, and drives the sensor to actively perform spatial alignment. Without replacing any parts, it achieves universal compatibility and high-fidelity test attitude simulation for multiple models of brake calipers.

[0027] 2. High-precision follow-up displacement measurement is achieved: Compared with existing technologies where long-distance non-contact measurement is easily affected by the shaking of the measured object, this invention achieves high precision by rigidly connecting the conformal plate to the brake pad support of the brake caliper and setting a guiding mechanism to constrain its parallel movement. This makes the physical reference of the displacement sensor and the measured object form a synchronously moving rigid body. This design fundamentally eliminates the measurement error introduced by brake caliper offset or posture changes, ensuring the objectivity and high repeatability of displacement data.

[0028] 3. A dual-drive mechanism balancing efficiency and precision is provided: Compared to the difficulty in balancing rapid movement and precise positioning with a single drive mechanism in existing technologies, the sliding mechanism of this invention innovatively integrates a cylinder unit and a lead screw unit. The cylinder enables rapid approach with a large stroke to improve operational efficiency, while the lead screw enables precise fine-tuning of the end position and utilizes its self-locking characteristic to achieve rigid locking, providing the sensor with a motion platform that combines rapid response and high stability.

[0029] 4. Integrated testing of multiple key test conditions: Compared with the existing technology that requires multiple dedicated devices to perform single tests such as displacement, load, and fatigue, this invention integrates the follow-up displacement testing mechanism and the direct force load testing mechanism on the same collaboratively positioned platform. This integrated design allows a single device to complete comprehensive testing of multiple key performance parameters, achieving a high degree of integration of testing functions and multi-functionality, while reducing equipment investment costs and test transfer time. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the detection device provided in the embodiments of this application; Figure 2 A schematic diagram of a detection device from another perspective, provided in an embodiment of this application; Figure 3 A schematic diagram of the limiting device equipped with brake calipers provided in an embodiment of this application; Figure 4 A schematic diagram of a limiting device equipped with a brake caliper from another perspective, provided for an embodiment of this application; Figure 5 This is a schematic diagram of the limiting device provided in the embodiments of this application; Figure 6 This is a schematic diagram of the brake caliper provided in an embodiment of this application; Figure 7 This is a schematic diagram of a detection device without brake calipers provided in an embodiment of this application; Figure 8 A schematic diagram of a detection device without brake calipers, provided as an embodiment of this application; Figure 9 This is a schematic diagram of the displacement testing mechanism provided in the embodiments of this application; Figure 10 This is a front view of the contour plate provided in the embodiments of this application; Figure 11This is a rear view of the contour plate provided in an embodiment of this application; Figure 12 This is a front view of the dovetail groove profile plate provided in an embodiment of this application; Figure 13 This is a schematic diagram of the structure of the dovetail member provided in the embodiments of this application; Figure 14 This is a schematic diagram of the detection device provided in the embodiments of this application; Figure 15 A schematic diagram of the detection device from another perspective, provided in an embodiment of this application; Figure 16 This is a schematic diagram of the support device provided in the embodiments of this application; Figure 17 A schematic diagram of the support device from another perspective, provided in an embodiment of this application; Figure 18 This is a schematic diagram of the structure of the crossbeam provided in an embodiment of this application; Figure 19 A schematic diagram of the beam from another perspective, provided for an embodiment of this application; In the above figures: 1. Support device; 11. Base; 12. Hanger; 121. Groove; 13. Casters; 131. Support feet; 2. Limiting device; 21. First positioning mechanism; 22. Second positioning mechanism; 23. Crossbeam; 231. First mounting surface; 232. Second mounting surface; 233. Boss; 24. Opening and closing mechanism; 241. Mounting part; 2411. Mounting hole; 3. Detection device; 31. Sensor assembly; 311. Displacement sensor; 312. Force sensor; 32. Third positioning mechanism; 33. Sliding mechanism; 331. Guide assembly; 3311 332. Guide rail; 333. Sliding load-bearing assembly; 3321. Bracket; 3322. Load-bearing plate; 3323. Slider; 333. Drive adjustment assembly; 3331. Cylinder unit; 3332. Lead screw unit; 34. Displacement testing mechanism; 341. Contouring plate; 3411. Dovetail part; 342. Guide mechanism; 3421. Optical axis; 3422. Flange linear bearing; 3423. Thrust rod; 35. Load testing mechanism; 351. Force measuring base; 4. Brake caliper; 41. Horizontal positioning part; 42. Vertical positioning part; 43. Brake pad support; 44. Dovetail groove. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to 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. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0032] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0033] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0034] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0035] refer to Figures 1-19 As shown, 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.

[0036] This application provides a brake caliper testing device, including, The support device 1 includes a base 11 and a bracket 12 fixed on the base 11; Limiting device 2 is mounted on bracket 12; the limiting device 2 is equipped with brake caliper 4 to be tested; Limiting device 2 includes: The first positioning mechanism 21 has a first moving trajectory along a horizontal direction parallel to the base 11 and is connected to the horizontal positioning part 41 of the brake caliper 4. The second positioning mechanism 22 has a second moving trajectory along the vertical direction perpendicular to the base 11 and is connected to the vertical positioning part 42 of the brake caliper 4. Detection device 3 includes: The sensor assembly 31 has two sensors that detect the brake caliper 4; A third positioning mechanism 32 is connected to a sensor assembly 31; the third positioning mechanism 32 has a third movement trajectory parallel to the second movement trajectory. The sliding mechanism 33 is connected to the base 11, and the third positioning mechanism 32 is disposed on the sliding mechanism 33; the sliding mechanism 33 has a fourth moving trajectory parallel to the first moving trajectory; The first positioning mechanism 21 and the second positioning mechanism 22 fix the posture and position of the brake caliper 4 so that the brake caliper 4 is in a preset test posture consistent with the actual working state; the third positioning mechanism 32 and the sliding mechanism 33 are used to drive the sensor assembly 31 to move so that the sensor assembly 31 is positioned at the brake caliper 4 in the test posture for detection.

[0037] Specifically, the brake caliper testing equipment includes a support device 1. The support device 1 consists of a base 11 and a bracket 12 fixed on the base 11. The base 11 of the support device 1 provides a horizontal mounting reference plane, and the bracket 12 is fixed to the upper surface of the base 11 and extends upward perpendicular to the base 11.

[0038] The limiting device 2 is suspended on the bracket 12. The brake caliper 4 to be tested is mounted on the limiting device 2. The brake caliper 4 is provided with a horizontal positioning part 41 and a vertical positioning part 42 for connecting with the limiting device 2.

[0039] The limiting device 2 includes a first positioning mechanism 21 and a second positioning mechanism 22. The first positioning mechanism 21 has a first moving trajectory, the direction of which is parallel to the plane of the base 11. The first positioning mechanism 21 moves linearly along the first moving trajectory, and upon reaching the corresponding position, establishes a mechanical connection with the horizontal positioning part 41 of the brake caliper 4. The second positioning mechanism 22 has a second moving trajectory, the direction of which is perpendicular to the plane of the base 11. The second positioning mechanism 22 moves linearly along the second moving trajectory, and upon reaching the corresponding position, connects with the vertical positioning part 42 of the brake caliper 4.

[0040] Through the movement and connection of the first positioning mechanism 21 and the second positioning mechanism 22 in two independent horizontal and vertical directions, the two positioning parts on the brake caliper 4 are fixed in specific spatial positions. The constraints in these two directions limit the degree of freedom of the brake caliper 4 in space, completely fixing its position and attitude, so that its spatial tilt and force state on the test platform are consistent with the actual vehicle operating state, that is, forming a preset test posture.

[0041] The detection device 3 is mounted on the surface of the base 11 of the support device 1. The detection device 3 includes a sensor assembly 31, which has two sensors mounted in its main body for detecting the brake caliper 4.

[0042] The third positioning mechanism 32 is fixedly connected to the sensor assembly 31 and serves to support the sensor assembly 31. The third positioning mechanism 32 has a third moving trajectory, the direction of which is parallel to the second moving trajectory, i.e., perpendicular to the plane of the base 11. The base portion of the sliding mechanism 33 is fixedly connected to the base 11, and the third positioning mechanism 32 is integrally mounted on the moving part of the sliding mechanism 33. The sliding mechanism 33 has a fourth moving trajectory, the direction of which is parallel to the first moving trajectory, i.e., parallel to the plane of the base 11.

[0043] After the limiting device 2 fixes the brake caliper 4 in position and keeps it stationary, the sliding mechanism 33 of the detection device 3 moves horizontally along the fourth moving trajectory, causing the third positioning mechanism 32 and the sensor assembly 31 above to move as a whole on the horizontal plane. At the same time, the third positioning mechanism 32 moves vertically along the third moving trajectory, causing the sensor assembly 31 to move vertically. The linear motions generated by the sliding mechanism 33 and the third positioning mechanism 32 are superimposed, jointly driving the sensor assembly 31 to move within the working area until the detection end face of the sensor assembly 31 reaches the coordinate position of the brake caliper 4 in the preset test posture, completing the spatial alignment before the test. Then, the sensor assembly 31 starts and performs the detection operation.

[0044] Furthermore, the first positioning mechanism 21 in the limiting device 2 has a first moving trajectory along a horizontal direction parallel to the base 11, and the second positioning mechanism 22 has a second moving trajectory along a vertical direction perpendicular to the base 11. The first and second moving trajectories are the fixed motion paths of the first positioning mechanism 21 and the second positioning mechanism 22 when adjusting their positions in space. For example, the first positioning mechanism 21 can be installed on the guide rail 3311 of the horizontal beam 23, and its straight sliding path along the guide rail 3311 is the first moving trajectory; the second positioning mechanism 22 can be installed on the vertically set optical axis 3421 or slide rail, and its up-and-down lifting path is the second moving trajectory. The construction of these two moving trajectories is closely related to the design of the overall frame of the equipment, mainly based on the spatial distribution range of the mounting holes 2411 (i.e., the horizontal positioning part 41 and the vertical positioning part 42) of the brake caliper 4 on the actual vehicle, to ensure that the first positioning mechanism 21 and the second positioning mechanism 22 can move along their respective trajectories and accurately reach the corresponding connection points of various types of brake calipers 4. When the device is working, the drive component drives the first and second positioning mechanisms 22 to move along the preset first and second moving trajectories, respectively, so that the two are connected and fixed to the horizontal positioning part 41 and the vertical positioning part 42 of the brake caliper 4, thereby constraining the spatial posture of the brake caliper 4.

[0045] Furthermore, the third positioning mechanism 32 in the detection device 3 has a third moving trajectory parallel to the second moving trajectory, and the sliding mechanism 33 has a fourth moving trajectory parallel to the first moving trajectory. The third moving trajectory is the path along which the third positioning mechanism 32 drives the sensor assembly 31 to rise and fall in the vertical direction, and the fourth moving trajectory is the path along which the sliding mechanism 33 pushes and pulls horizontally on the base 11. For example, the sliding mechanism 33 can be guided by a linear guide rail 3311 mounted on the base 11, and the extension direction of the guide rail 3311 determines the fourth moving trajectory; the third positioning mechanism 32 can include a lead screw slider 3323 module mounted on the support 3321 of the sliding mechanism 33, and the vertical rising and falling path of the slider 3323 is the third moving trajectory. The design that the fourth moving trajectory is parallel to the first moving trajectory and the third moving trajectory is parallel to the second moving trajectory ensures that the motion coordinate system of the detection device 3 and the motion coordinate system of the limiting device 2 maintain spatial consistency. According to the test requirements, the drive component controls the third positioning mechanism 32 and the sliding mechanism 33 to move along the third and fourth moving trajectories respectively. This parallel trajectory design based on a unified coordinate system enables the sensor component 31 to efficiently and accurately position itself to a specific measurement point of the brake caliper 4 in the test posture for parameter acquisition.

[0046] In some specific embodiments of this application, an opening and closing mechanism 24 is also included, which is disposed on the first positioning mechanism 21, and the opening and closing mechanism 24 has two relatively movable mounting parts 241, each mounting part 241 having a mounting hole 2411; the horizontal positioning part 41 is connected to the mounting part 241 by fasteners passing through the mounting holes 2411. Among them, the first positioning mechanism 21, the second positioning mechanism 22, the opening and closing mechanism 24, and the third positioning mechanism 32 are all driven by a lead screw mechanism.

[0047] Specifically, an opening and closing mechanism 24 is provided on the first positioning mechanism 21. The opening and closing mechanism 24 is mainly driven by the lead screw transmission assembly, and two mounting parts 241 that can slide relative to each other in the horizontal direction along the first positioning mechanism 21 are symmetrically arranged on both sides. Each mounting part 241 is provided with one or more standardized mounting holes 2411.

[0048] In practical operation, when testing brake calipers 4 with different widths, the operator can drive the adjusting opening and closing mechanism 24 through the screw drive assembly to make the two mounting parts 241 move synchronously towards or away from each other until the center distance of the two mounting holes 2411 matches the spacing of the horizontal positioning parts 41 of the brake caliper 4 under test. Then, by using bolts or other fasteners passing through the mounting holes 2411, the horizontal positioning parts 41 of the brake caliper 4 can be securely locked onto the mounting parts 241. This design completely breaks through the limitations of traditional fixed-size clamps, achieving adaptive clamping of various brake calipers 4.

[0049] Furthermore, the first positioning mechanism 21, the second positioning mechanism 22, the opening and closing mechanism 24, and the third positioning mechanism 32 all adopt a lead screw mechanism as the core driving source.

[0050] By employing a lead screw structure design, the rotational motion of the power source can be converted into smooth linear motion, thereby achieving precise position control when adjusting the three-dimensional test posture of the brake caliper 4 under test and adjusting the alignment position of the sensor assembly 31. Furthermore, the lead screw transmission mechanism itself possesses a mechanical self-locking characteristic. When any positioning mechanism or opening / closing mechanism 24 moves to the set position and stops driving input, the self-locking characteristic of the lead screw mechanism reliably locks the position of the component, eliminating the need for additional mechanical locking devices. Simultaneously, the self-locking characteristic effectively resists the braking load applied during testing, ensuring that the brake caliper 4 and the sensor do not experience relative displacement or retraction during the testing cycle, guaranteeing the stability of the testing environment and the reliability of the test data.

[0051] Furthermore, fasteners can be screws, bolts, etc.

[0052] In some specific embodiments of this application, the brake caliper 4 includes two oppositely arranged brake pad supports 43; The detection device 3 also includes: The displacement testing mechanism 34 includes two contour plates 341 that are rigidly connected to the brake pad support 43 respectively, and a guide mechanism 342 disposed between the two contour plates 341 to constrain the two brake pad supports 43 to maintain relative parallel movement. Among the two sensors in the sensor assembly 31, at least one is a displacement sensor 311. The displacement sensor 311 is connected to the contour plate 341 and is used to measure the displacement of the brake caliper 4 by moving synchronously with the brake pad through the contour plate 341.

[0053] Specifically, the testing device 3 further includes a displacement testing mechanism 34. This displacement testing mechanism 34 mainly consists of two contour plates 341 and a guiding mechanism 342. During the preparation phase for the testing task, the operator needs to position and install the two contour plates 341 on the brake pad supports 43 positioned opposite each other on both sides of the brake caliper 4 to be tested. The outline of the contour plates 341 is designed based on the back plate dimensions of a standard brake pad. Each contour plate 341 is fixedly connected to its corresponding brake pad support 43. This fixed connection eliminates any gaps or relative degrees of freedom between the contour plates 341 and the brake pad support 43, ensuring that they move synchronously in all subsequent spatial movements. This guarantees that the displacement generated by the brake pad support 43 can be transmitted to the contour plates 341 without deviation.

[0054] A guide mechanism 342 is transversely connected between the two contour plates 341. This guide mechanism 342 specifically includes a fixed mounting assembly and a sliding guide assembly 331, which in this design is manifested as the mating structure of a flange linear bearing 3422 and a light shaft 3421. The flange end face of the flange linear bearing 3422 is fixedly mounted on the outer side or inner cavity of the contour plate 341 by fastening bolts; the light shaft 3421, as a straight guide reference component, has a precision-machined surface and slides through the inner hole of the flange linear bearing 3422. When the brake caliper 4 performs clamping or releasing actions during testing, the brake pad supports 43 on both sides will generate relative movement. At this time, the physical action that drives the brake pad supports 43 to move is transmitted to the contour plate 341 through a rigid connection, forcing the flange linear bearing 3422 to slide linearly back and forth along the light shaft 3421 that passes through it. Due to the tight fit tolerance between the optical axis 3421 and the flange linear bearing 3422, and the constraint provided by the parallel optical axis 3421, the guide mechanism 342 effectively restricts the translational and rotational degrees of freedom of the contour plate 341 in all directions except the axial direction of the optical axis 3421. This geometric constraint mechanism forces the brake pad supports 43 on both sides and the contour plate 341 to maintain a strictly parallel relative state throughout their entire working stroke, preventing the brake pad supports 43 from flipping, tilting, or twisting under load or long-stroke motion conditions. Simultaneously, thrust rods 3423 are installed at both ends of the optical axis 3421, which act as limiters to prevent the optical axis 3421 from accidentally dislodging from the flange linear bearing 3422.

[0055] In addition, a displacement sensor 311 is configured in the sensor assembly 31. The displacement sensor 311 is mounted on the designated measurement reference surface of the profile plate 341 by fixing screws. During the clamping cycle, the displacement sensor 311 is fixedly connected to the profile plate 341 and moves linearly synchronously with the brake pad support 43, linearly acquiring and outputting displacement data reflecting the actual working stroke of the brake caliper 4. Furthermore, a thermal insulation structure is configured outside the displacement sensor 311. This thermal insulation structure includes an outer metal protective shell, with thermal insulation material filling the space between the inner wall of the protective shell and the sensor, and an electric heating coil distributed inside the insulation layer. When the ambient temperature drops to the low-temperature test conditions, the heat generated by the energized heating coil is enclosed within the sealed cavity formed by the thermal insulation structure and the metal protective shell, maintaining the normal operating stability range required for the internal displacement sensor 311 and ensuring measurement accuracy under extreme low-temperature environments.

[0056] In some specific embodiments of this application, each contour plate 341 is provided with a rotatable dovetail member 3411; the brake caliper 4 is provided with a dovetail groove 44 that matches the dovetail member 3411, and the dovetail member 3411 is engaged in the dovetail groove 44 to achieve a fixed connection between the contour plate 341 and the brake pad support 43.

[0057] Specifically, each contour plate 341 is equipped with a positioning screw and a dovetail part 3411 that can rotate in a plane. The external dimensions and contour of the dovetail part 3411 match the original dovetail groove 44 structure inside the brake caliper 4 pad support 43.

[0058] During the installation of the contour plate 341, the operator first adjusts the spatial position of the contour plate 341 in a specific direction, moving it closer to the brake pad support 43 until the pre-set positioning screws on the contour plate 341 accurately fall into and contact the bottom reference surface of the dovetail groove 44 of the brake pad support 43. This completes the initial positioning of the contour plate 341 relative to the brake pad support 43. In the initial installation state, the dovetail edge of the dovetail piece 3411 on the contour plate 341 remains horizontal and parallel to prevent interference when inserted into the dovetail groove 44. After confirming that the inner side of the contour plate 341 is close to the surface of the brake pad support 43, the operator uses a tool to rotate the dovetail piece 3411 around its central axis, so that the dovetail edge of the dovetail piece 3411 is embedded and engages with the side wall of the dovetail groove 44 on the brake pad support 43. This rotational fitting process applies a significant compressive force that overcomes the gap between the two components, forcing the entire inner surface of the contour plate 341 to press tightly against and over a large area against the inner surface of the brake pad support 43. Finally, the rotation angle of the dovetail member 3411 is locked by turning and tightening the fastening screws inside the dovetail member 3411. After completing the above operations, the contour plate 341 is firmly fixed together with the brake pad support 43.

[0059] In some specific embodiments of this application, the detection device 3 further includes: The load testing mechanism 35 includes a force measuring base 351, which is connected to the third positioning mechanism 32 and is disposed between two opposing brake pad supports 43. Another sensor in the sensor assembly 31 is a force sensor 312, which is integrated on the force measuring base 351 and is used to measure the output load of the brake caliper 4 when the brake caliper 4 clamps the force measuring base 351.

[0060] Specifically, the testing device 3 is further equipped with a load testing mechanism 35, which includes a force measuring base 351. One side of the force measuring base 351 is fixedly connected to the third positioning mechanism 32, and moves and positions itself along with the third positioning mechanism 32 and the sliding mechanism 33. When performing load and related braking performance testing tasks, the force measuring base 351 is positioned between the two opposing brake pad supports 43 of the brake caliper 4 under test. This layout replicates the working environment of a real rail vehicle braking system, where the brake pads on both sides of the caliper clamp the brake disc in the central position.

[0061] Another core detection element included in the sensor assembly 31 is the force sensor 312. This force sensor 312 is integrated and mounted on the force-measuring base 351, or embedded within its force transmission path. When the test process begins, and the brake caliper 4 receives a control command to perform the clamping action, the brake pad supports 43 on both sides, or the contour plates 341 mounted on them, move towards each other and press against the two surfaces of the force-measuring base 351 located at the center with a huge clamping force.

[0062] At this moment, the clamped force-measuring base 351 bears the entire load output by the brake caliper 4. The force sensor 312 integrated on the force-measuring base 351 is simultaneously subjected to pressure deformation, converting the load it bears into an electrical signal output in real time. Since the force sensor 312 is directly located in the core area of ​​the caliper's clamping force, this design eliminates complex transmission mechanisms and intermediate connecting components, achieving the most direct reading of braking force parameters, accurately measuring and recording the output load data of the brake caliper 4 under various simulated working conditions, and completing the evaluation of the caliper's braking performance.

[0063] In some specific embodiments of this application, the limiting device 2 further includes: The crossbeam 23 has a first positioning mechanism 21 mounted on a first mounting surface 231 and a second positioning mechanism 22 mounted on a second mounting surface 232 adjacent to the first mounting surface 231. The limiting device 2 is hung on the bracket 12 via the crossbeam 23.

[0064] Specifically, the limiting device 2 also includes a crossbeam 23. A first positioning mechanism 21 is disposed on a first mounting surface 231 of the crossbeam 23. The base of the first positioning mechanism 21 is attached to and fixed to the first mounting surface 231, using the first mounting surface 231 as the base surface for its linear movement trajectory. A second positioning mechanism 22 is disposed on a second mounting surface 232 of the crossbeam 23. The second mounting surface 232 is adjacent to the first mounting surface 231 on the outer boundary of the crossbeam 23. The base of the second positioning mechanism 22 is attached to and fixed to the second mounting surface 232, using the second mounting surface 232 as the base surface for its linear movement trajectory.

[0065] The first positioning mechanism 21 and the second positioning mechanism 22 are respectively installed on two adjacent solid surfaces of the crossbeam 23, and are arranged offset in spatial geometry. This arrangement ensures that when the first positioning mechanism 21 moves linearly along the trajectory on the first mounting surface 231, its moving parts will not enter the movement space of the second positioning mechanism 22, and the movement of the second positioning mechanism 22 will also not enter the movement space of the first positioning mechanism 21.

[0066] In the overall assembly, the limiting device 2 is directly mounted or hooked onto the bracket 12 of the support device 1 with the crossbeam 23 as the connecting component, so that the crossbeam 23 and the bracket 12 form physical contact, and the position of the limiting device 2 is fixed on the bracket 12.

[0067] Furthermore, the limiting device 2 is detachably mounted to the bracket 12 via the crossbeam 23. In actual operation, the brake caliper 4 to be tested is first moved to the limiting device 2, and the caliper is connected to the first positioning mechanism 21 and the second positioning mechanism 22 of the limiting device 2. After the brake caliper 4 is connected to the entire limiting device 2 as a unit, the unit is then moved to mount the crossbeam 23 of the limiting device 2 as a whole on the set position of the bracket 12, completing the final installation.

[0068] In some specific embodiments of this application, the hanger 12 is composed of two support columns fixed on the base 11, and the crossbeam 23 of the limiting device 2 is erected on the top of the two support columns.

[0069] Specifically, the bracket 12 in the support device 1 consists of two support columns. The bottom ends of the two support columns are fixedly connected to the surface of the base 11 of the support device 1 and extend upward in a direction perpendicular to the plane of the base 11. A set horizontal distance is maintained between the two support columns, forming an open internal space, which provides a channel for the movement of the detection device 3 below and the insertion of detection tools.

[0070] The limiting device 2 includes a crossbeam 23. During the assembly of the hanger 12 and the limiting device 2, the entire limiting device 2 is raised above the top of the support columns. The position of the limiting device 2 on the horizontal plane is adjusted so that both ends of the crossbeam 23 are aligned with the two support columns erected on the base 11. Then, the limiting device 2 is lowered vertically so that the contact surfaces at the bottom of both ends of the crossbeam 23 directly contact and land on the top end faces of the support columns, completing the erection operation.

[0071] In its erected state, the crossbeam 23 spans between the two support columns. The weight of each positioning mechanism in the limiting device 2, as well as the weight of the brake caliper 4 under test mounted below the limiting device 2, is first transferred and concentrated onto the crossbeam 23. The crossbeam 23 distributes the concentrated load to its two ends, generating downward pressure at the physical contact interface between the bottom of the two ends of the crossbeam 23 and the top end face of the support column. This pressure acts directly on the support column, and since the support column is vertical, the load is transmitted downward along the axial direction of the support column, eventually dispersing onto the base 11 of the entire supporting device 1. The closed annular force-bearing frame formed by the support column and the crossbeam 23 restricts the downward degree of freedom of the limiting device 2 in the vertical direction.

[0072] In some specific embodiments of this application, the top of the support column is provided with a groove 121, and both ends of the crossbeam 23 are provided with protrusions 233 with convex wedge surfaces; the protrusions 233 at both ends of the crossbeam 23 are respectively inserted into the corresponding grooves 121.

[0073] Specifically, the top surfaces of the two support columns of the hanger 12 are machined with positioning grooves 121. These grooves 121 are recessed downwards, and their internal contours are used to accommodate and constrain subsequent mating components. Correspondingly, the lower surfaces of the two ends of the crossbeam 23 of the limiting device 2 in its length direction are integrally formed with bosses 233 by machining. The side faces of these bosses 233 are machined into convex wedge-shaped surfaces with a predetermined slope, so that the cross-section of the bosses 233 gradually narrows from top to bottom.

[0074] When hoisting the limiting device 2, equipped with the brake caliper 4 to be tested, onto the hanger 12, the hoisting equipment is operated to slowly lower the limiting device 2 vertically, aligning the positioning bosses 233 at both ends of the crossbeam 23 with the positioning grooves 121 at the top of the two support columns. During the descent of the bosses 233 into the grooves 121, if there is an initial positional deviation of the crossbeam 23 in the horizontal direction, the narrower portion of the lower end of the bosses 233 will first enter the opening of the groove 121 without interference. As the crossbeam 23 continues to descend, the inclined convex wedge surface on the bosses 233 will contact the edge or inner wall of the positioning groove 121. Under the action of gravity, the wedge surface of the bosses 233 slides down along the inner wall of the groove 121. The horizontal component of the supporting force generated by this contact surface pushes the entire crossbeam 23 to automatically center until the bosses 233 are completely inside the groove 121.

[0075] When the positioning bosses 233 at both ends of the crossbeam 23 are fully inserted into the corresponding positioning grooves 121, the convex wedge surfaces make tight surface contact with the inner wall of the grooves 121. At this time, the inner wall of the positioning grooves 121 forms a geometric limit on the positioning bosses 233 in two orthogonal directions parallel to the base 11. This geometric limit restricts all horizontal translational degrees of freedom of the crossbeam 23 relative to the support column and prevents the crossbeam 23 from rotating around the vertical axis. Through the wedge surface cooperation between the positioning grooves 121 and the positioning bosses 233, the limiting device 2 completes the alignment with the center of the hanger 12 by its own weight without the need for precise manual alignment, and its horizontal position is automatically locked after the installation is completed.

[0076] In some specific embodiments of this application, the sliding mechanism 33 includes: The guide assembly 331 is mounted on the base 11 of the support device 1; The sliding support component 332 is slidably mounted on the guide component 331 at the bottom and has a bracket 3321 at the top. The drive adjustment assembly 333 is connected to the sliding bearing assembly 332. The drive adjustment assembly 333 includes a cylinder unit 3331 for driving the sliding bearing assembly 332 to move along the guide assembly 331, and a lead screw unit 3332 for adjusting and locking the position of the sliding bearing assembly 332. The third positioning mechanism 32 is mounted on the bracket 3321.

[0077] Specifically, the sliding mechanism 33 of the detection device 3 includes a guide assembly 331, a sliding bearing assembly 332, and a drive adjustment assembly 333. The guide assembly 331 is directly fixedly mounted on the surface of the base 11 of the support device 1, and the guide assembly 331 consists of two parallel linear guide rails 3311. The extending direction of the linear guide rails 3311 is parallel to the moving trajectory of the first positioning mechanism 21 in the limiting device 2.

[0078] The sliding support assembly 332 is positioned above the guide assembly 331. The sliding support assembly 332 includes a support plate 3322. Slider blocks 3323 are fixedly connected to both sides of the bottom of the support plate 3322. The sliders 3323 are slidably connected to two guide rails 3311, allowing the support plate 3322 to move linearly along the guide rails 3311. Through the interaction between the sliders 3323 and the guide rails 3311, the sliding support assembly 332 restricts translational and rotational degrees of freedom other than those along the extension direction of the guide rails 3311. On the top surface of the support plate 3322, opposite to the sliders 3323, two parallel support arms are vertically fixed upwards.

[0079] The drive adjustment assembly 333 connects the base 11 and the sliding bearing assembly 332. The drive adjustment assembly 333 includes an independently operating cylinder unit 3331 and a lead screw unit 3332. The cylinder body of the cylinder unit 3331 is fixed to the base 11, and the extended end of its piston rod is connected to the bearing plate 3322 of the sliding bearing assembly 332. The two ends of the lead screw of the lead screw unit 3332 are supported on the base 11 by bearing seats, and the nut seat is connected to the bearing plate 3322 of the sliding bearing assembly 332.

[0080] In the initial stage of the testing task, the sliding bearing assembly 332 is in a standby position. First, the cylinder unit 3331 is activated, and the piston rod of the cylinder unit 3331 extends rapidly, pushing the sliding bearing assembly 332 to move rapidly and over a wide range along the linear guide rail 3311 of the guide assembly 331 towards the area where the brake caliper 4 is located. When the bearing plate 3322 reaches the vicinity of the target position, the cylinder unit 3331 stops operating.

[0081] Subsequently, the lead screw unit 3332 is driven. The rotation of the lead screw drives the nut seat meshing with the lead screw to perform linear feed motion, causing the sliding bearing assembly 332 to continue to perform extremely low-speed displacement adjustment on the linear guide rail 3311. When the sliding bearing assembly 332 reaches the designated test coordinate position, the rotation drive of the lead screw stops. The static friction between the lead screw and the nut thread surface constitutes a mechanical self-locking mechanism, maintaining the fixed position of the sliding bearing assembly 332 and its upper mechanism during the test.

[0082] Furthermore, a third positioning mechanism 32 is disposed between the two support arms. The third positioning mechanism 32 includes a vertically arranged adjusting screw and a lifting slider 3323 that cooperates with the adjusting screw. The two ends of the adjusting screw are respectively connected to and supported on the two support arms. The sensor assembly 31 in the detection device 3 is disposed on the lifting slider 3323. Rotating the adjusting screw drives the lifting slider 3323, causing the sensor assembly 31 to move up and down in the vertical plane along the extension direction of the two support arms. When the sensor assembly 31 moves to the target height position, the drive stops, and the position of the lifting slider 3323 is locked using the self-locking characteristic of the screw drive. Under the combined action of the horizontal movement of the sliding mechanism 33 and the vertical movement of the third positioning mechanism 32, the sensor is positioned at the designated test position of the brake pads of the brake caliper 4.

[0083] In some specific embodiments of this application, the support device 1 further includes: Several casters 13 are set at the bottom of the base 11 of the support device 1. Each caster 13 is integrated with an adjustable support foot cup 131. The casters 13 are used to move the testing equipment. After the testing equipment is moved to the predetermined position, the support foot cup 131 extends downward to fix the equipment and level it.

[0084] Specifically, four casters 13 are installed on the lower part of the base 11 of the testing device 3, distributed at the four corners of the bottom frame. These casters 13 allow the entire testing equipment to be easily moved by a single person in the testing workshop, or to be easily pushed into or moved out of the high and low temperature test chamber when high and low temperature tests are required.

[0085] To ensure quick and secure fixing of the equipment after it has been moved to the designated working position, each caster wheel 13 integrates an adjustable-height support foot 131. This support foot 131 typically has a threaded structure; by rotating the adjustment mechanism, its bottom support foot can extend downwards and contact the ground. When all four support feet 131 are extended and in contact with the ground, the caster wheels 13 are lifted off the ground, thus securely transferring the weight of the entire equipment to the ground and eliminating testing errors that might result from the wobbling of the caster wheels 13 themselves.

[0086] Furthermore, by adjusting the extension height of each support foot 131, the levelness of the entire support device 1 can be adjusted to adapt to uneven ground, ensuring the levelness of the test benchmark and providing a reliable guarantee for high-precision testing. By integrating casters 13 and height-adjustable support feet 131 at the bottom of the support device 1, the seemingly contradictory needs of convenient movement and stable operation of large testing equipment are perfectly resolved in a simple and cost-effective manner, significantly improving the application flexibility and adaptability of the equipment to the testing environment.

[0087] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A brake caliper testing device, characterized in that, include: The support device (1) includes a base (11) and a bracket (12) fixed on the base (11). The limiting device (2) is mounted on the bracket (12); the limiting device (2) is equipped with the brake caliper (4) to be tested. The limiting device (2) includes: The first positioning mechanism (21) has a first moving trajectory in a horizontal direction parallel to the base (11) and is connected to the horizontal positioning part (41) of the brake caliper (4); The second positioning mechanism (22) has a second moving trajectory in the vertical direction perpendicular to the base (11) and is connected to the vertical positioning part (42) of the brake caliper (4); The detection device (3) includes: The sensor assembly (31) has two sensors that detect the brake caliper (4); A third positioning mechanism (32) is connected to a sensor assembly (31); the third positioning mechanism (32) has a third movement trajectory parallel to the second movement trajectory; A sliding mechanism (33) is connected to a base (11), and a third positioning mechanism (32) is disposed on the sliding mechanism (33); the sliding mechanism (33) has a fourth moving trajectory parallel to the first moving trajectory; The first positioning mechanism (21) and the second positioning mechanism (22) fix the posture and position of the brake caliper (4) so ​​that the brake caliper (4) is in a preset test posture consistent with the actual working state; the third positioning mechanism (32) and the sliding mechanism (33) are used to drive the sensor assembly (31) to move so that the sensor assembly (31) is positioned at the brake caliper (4) in the test posture for detection.

2. The brake caliper testing device according to claim 1, characterized in that, Also includes: An opening and closing mechanism (24) is provided on the first positioning mechanism (21), and the opening and closing mechanism (24) has two relatively movable mounting parts (241), each mounting part (241) is provided with a mounting hole (2411); the horizontal positioning part (41) is connected to the mounting part (241) by fasteners passing through the mounting hole (2411); Among them, the first positioning mechanism (21), the second positioning mechanism (22), the opening and closing mechanism (24), and the third positioning mechanism (32) are all driven by a lead screw mechanism.

3. The brake caliper testing device according to claim 1, characterized in that, The brake caliper (4) includes two opposing brake pad supports (43); The detection device (3) also includes: The displacement testing mechanism (34) includes two contour plates (341) that are rigidly connected to the brake pad support (43) respectively, and a guide mechanism (342) disposed between the two contour plates (341) to constrain the two brake pad supports (43) to maintain relative parallel movement. Among the two sensors in the sensor assembly (31), at least one is a displacement sensor (311). The displacement sensor (311) is connected to the contour plate (341) and is used to measure the displacement of the brake caliper (4) by moving synchronously with the brake pad through the contour plate (341).

4. The brake caliper testing device according to claim 3, characterized in that, Each contour plate (341) is provided with a rotatable dovetail piece (3411); the brake caliper (4) is provided with a dovetail groove (44) that matches the dovetail piece (3411), and the dovetail piece (3411) is engaged in the dovetail groove (44) to achieve a fixed connection between the contour plate (341) and the brake pad support (43).

5. The brake caliper testing device according to claim 3, characterized in that, The detection device (3) also includes: The load testing mechanism (35) includes a force measuring base (351), which is connected to a third positioning mechanism (32) and is set between two opposing brake pad supports (43); Another sensor in the sensor assembly (31) is a force sensor (312), which is integrated on the force measuring base (351) to measure the output load of the brake caliper (4) when the brake caliper (4) clamps the force measuring base (351).

6. The brake caliper testing device according to claim 1, characterized in that, The limiting device (2) also includes: The first positioning mechanism (21) is set on the first mounting surface (231) of the crossbeam (23), and the second positioning mechanism (22) is set on the second mounting surface (232) adjacent to the first mounting surface (231); the limiting device (2) is hung on the bracket (12) through the crossbeam (23).

7. The brake caliper testing device according to claim 6, characterized in that, The bracket (12) consists of two support columns fixed on the base (11), and the crossbeam (23) of the limiting device (2) is placed on top of the two support columns.

8. The brake caliper testing device according to claim 7, characterized in that, The top of the support column is provided with a groove (121), and the two ends of the crossbeam (23) are provided with protrusions (233) with convex wedge surfaces; the protrusions (233) at both ends of the crossbeam (23) are respectively inserted into the corresponding grooves (121).

9. The brake caliper testing device according to claim 1, characterized in that, The sliding mechanism (33) includes: The guide assembly (331) is mounted on the base (11) of the support device (1); The sliding bearing assembly (332) is slidably mounted on the guide assembly (331) at the bottom and has a bracket (3321) at the top. The drive adjustment assembly (333) is connected to the sliding bearing assembly (332); the drive adjustment assembly (333) includes a cylinder unit (3331) for driving the sliding bearing assembly (332) to move along the guide assembly (331), and a lead screw unit (3332) for adjusting and locking the position of the sliding bearing assembly (332). The third positioning mechanism (32) is mounted on the bracket (3321).

10. The brake caliper testing device according to claim 1, characterized in that, The support device (1) also includes: Several casters (13) are set at the bottom of the base (11) of the support device (1). Each caster (13) is equipped with an adjustable support foot cup (131). The casters (13) are used to move the testing equipment. The support foot cup (131) extends downward after the testing equipment moves to the predetermined position to fix and level the equipment.

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