A testing device

Abstract

The present invention provides a testing device for testing electromagnetic self-feeding, the testing device including a wheel hub, an electromagnetic energy extraction device, a support portion, a valve block, and a brake disc arranged relative to the valve block, the brake disc including a disc body and a spacer protruding from the disc body, the valve block being arranged at the end of the supporting portion, and the end of the spacer facing away from the disc body being connected to the supporting portion; at least one hydraulic piston is provided on the valve block, the piston rod of the hydraulic piston is used to stop the end surface relative to the disc body and the valve block; the electromagnetic energy extraction device includes a mover assembly and a stator assembly coordinated with the mover assembly, the mover assembly is fixedly connected to the wheel hub, the movers of the mover assembly are distributed along the circumference of the wheel hub, the valve block has a stator mounting section relative to the inner side surface of each mover, and the stators of the stator assembly are fixedly distributed on the outer circumferential surface of the stator mounting section; the testing device also includes a first motor electrically connected to the electromagnetic energy extraction device, and the first motor is drivingly connected to each hydraulic piston.

Description

Technical Field

[0001] The present invention relates to the field of testing technology, and in particular to a testing device for testing an electromagnetic self-feeding device. Background Art

[0002] To address the difficulties and complexities of piping layout in aircraft hydraulic brake systems, prior art has proposed an electromagnetic self-regenerating brake device, such as the Chinese invention patent application, publication number CN112644694A, titled "An Integrated Electromagnetic Energy Conversion Hydraulic Brake Device." This device recovers kinetic energy from the high-speed rotation of the aircraft's wheels during landing, converting it into electrical energy. This electrical energy is then fed to a motor pump, which converts it into hydraulic energy for braking. However, prior art has yet to develop a device for testing electromagnetic self-regenerating brake devices. Summary of the Invention

[0003] In order to solve at least one of the above technical problems, the present invention provides a testing device.

[0004] According to one aspect of the present invention, a testing device for testing electromagnetic self-feeding includes a wheel hub, an electromagnetic energy extraction device, a support portion, a valve block, and a brake disc spaced relative to the valve block, the brake disc including a disc body and a spacer protruding from the disc body, the valve block being disposed at an end of the support portion, and the end of the spacer facing away from the disc body being connected to the support portion;

[0005] At least one hydraulic piston is provided on the valve block, and the piston rod of the hydraulic piston is used to stop at the end surface of the disc body opposite to the valve block;

[0006] The electromagnetic energy extraction device includes a mover assembly and a stator assembly coordinated with the mover assembly, the mover assembly is fixedly connected to the wheel hub, the movers of the mover assembly are distributed along the circumference of the wheel hub, the valve block has a stator mounting section opposite to the inner side surfaces of the movers, and the stators of the stator assembly are fixedly distributed on the outer circumferential surface of the stator mounting section;

[0007] The testing device further includes a first motor electrically connected to the electromagnetic energy extraction device, and the first motor is drivingly connected to each of the hydraulic pistons.

[0008] According to at least one embodiment of the present invention, the testing device further includes a second motor for driving the wheel hub to rotate, and an output shaft of the second motor is drivingly connected to the wheel hub.

[0009] According to at least one embodiment of the present invention, the testing device further includes a controller, which is respectively connected to the pressure sensor and the second motor provided on the valve block, and the controller is used to control the speed of the second motor. The controller is also used to perform closed-loop control of the second motor based on the data of the pressure sensor.

[0010] According to at least one embodiment of the present invention, the valve block has a through hole for the support portion to pass through, and the valve block is detachably sleeved on an end portion of the support portion; and / or,

[0011] The spacer portion of the brake disc is detachably connected to the support portion.

[0012] According to at least one embodiment of the present invention, the support portion comprises a shoulder section and a neck section coordinated with the through hole of the valve block, the valve block is sleeved on the neck section, at least a portion of the end surface of the valve block facing away from the brake disc is coordinated with the shoulder section, and the support portion is further provided with a clamping device for stopping the valve block against the shoulder section; and / or,

[0013] The spacer is detachably connected to the end of the support portion where the valve block is provided, or the support portion has a cavity for the spacer to pass through, and the end of the spacer away from the disc body is detachably connected to the end of the support portion away from the valve block.

[0014] According to at least one embodiment of the present invention, a central axis of the hub is collinear with a central axis of the support portion.

[0015] According to at least one embodiment of the present invention, the testing device further comprises a first bracket and a second bracket arranged opposite to the first bracket, the hub is rotatably mounted on the first bracket, and the end of the support portion facing away from the valve block is fixedly mounted on the second bracket;

[0016] The first bracket and the second bracket are both provided with holes at corresponding positions for pins to pass through, and the pins are used to keep the central axis of the hub and the central axis of the support portion collinear.

[0017] According to at least one embodiment of the present invention, the testing device also includes a base plate, a limiting boss protruding from the base plate is provided in the middle of the base plate, the first bracket and the second bracket are respectively arranged on opposite sides of the limiting boss, and the first bracket and the second bracket are respectively fitted with the side surfaces of the corresponding limiting boss.

[0018] According to at least one embodiment of the present invention, the valve block is further provided with an oil tank connected to the hydraulic piston. The oil in the oil tank is pressurized by the pump driven by the first motor and drives the piston rod of the hydraulic piston.

[0019] The beneficial effects of the present invention are as follows: the present invention simulates the wheel hub through the wheel hub, and the support part is used to fix the electromagnetic energy extraction device, the valve block and the brake disc. By setting the brake disc, the brake disc part of the complex brake device on the wheel is replaced, so that the structure of the test device is simpler; the movable subassembly is distributed along the circumference of the wheel hub and fixed to the wheel hub. The movable subassembly rotates at high speed and cooperates with the stator assembly installed on the valve block to convert the rotational kinetic energy of the wheel hub into electrical energy through electromagnetic induction. The converted electrical energy is supplied to the first motor for driving the piston to extend and abut against the end face of the disc body opposite to the valve block to simulate the brake device, thereby simulating the energy conversion situation when the aircraft wheel lands, and then testing the use of electromagnetic self-feeding for braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings illustrate exemplary embodiments of the present invention and together with the description serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0021] Figure 1 is a schematic diagram of a testing device according to an embodiment of the present invention.

[0022] Figure 2 is based on Figure 1 Schematic diagram of the wheel hub in the test setup shown.

[0023] Figure 3 is based on Figure 1 Schematic diagram of the support part in the test device shown.

[0024] Figure markings: 1-wheel hub; 2-support part; 3-valve block; 4-brake disc; 5-disc body; 6-spacer; 7-piston rod; 8-mover assembly; 9-stator assembly; 10-stator mounting section; 11-first motor; 12-second motor; 13-shoulder section; 14-neck section; 15-pressure plate; 16-first screw; 17-first bracket; 18-second bracket; 19-pin rod; 20-oil tank; 21-limiting boss; 22-bearing; 23-hole retaining ring; 24-shaft retaining ring; 25-flat key; 26-fourth screw; 27-fifth screw. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It will be understood that the specific embodiments described herein are intended only to explain the relevant content and are not intended to limit the present invention. It should also be noted that, for ease of description, only portions relevant to the present invention are shown in the accompanying drawings.

[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] Existing electromagnetic self-regeneration systems recycle the kinetic energy of high-speed wheel rotation during landing, converting it into electrical energy. This energy is then fed into a motor pump, which then converts it into hydraulic energy for braking. However, whether the energy converted by electromagnetic self-regeneration is sufficient for braking and whether it can achieve braking under various aircraft wheel operating conditions requires appropriate testing equipment.

[0028] See also Figure 1 According to a first embodiment of the present invention, a test device is provided for testing electromagnetic self-feeding, the test device comprising a wheel hub 1, an electromagnetic energy extraction device, a support portion 2, a valve block 3, and a brake disc 4 arranged relative to the valve block 3, the brake disc 4 comprising a disc body 5 and a spacer 6 protruding from the disc body 5, the valve block 3 being arranged at the end of the support portion 2, and the end of the spacer 6 facing away from the disc body 5 being connected to the support portion 2; at least one hydraulic piston is provided on the valve block 3, the piston rod 7 of the hydraulic piston being used to stop the end surface of the disc body 5 opposite to the valve block 3; the electromagnetic energy extraction device comprises a mover assembly 8 and a stator assembly 9 coordinated with the mover assembly 8, the mover assembly 8 is fixedly connected to the wheel hub 1, the movers of the mover assembly 8 are distributed along the circumference of the wheel hub 1, the valve block 3 has a stator mounting section 10 opposite to the inner side surface of each mover, and the stators of the stator assembly 9 are fixedly distributed on the outer circumferential surface of the stator mounting section 10; the test device further comprises a first motor 11 electrically connected to the electromagnetic energy extraction device, and the first motor 11 is drivingly connected to each hydraulic piston.

[0029] In fact, the structure of the electromagnetic energy harvesting device is consistent with that of the energy harvesting device in the existing electromagnetic self-feeding device, and will not be described in detail here.

[0030] It is understandable that the mover assembly 8 of the electromagnetic energy extraction device can be directly fixed to the wheel hub 1; alternatively, a mounting ring can be provided on the wheel hub 1, and a protrusion protruding toward the inside of the mounting ring can be provided on the inner wall of the mounting ring, and the winding can be wound around the protrusion, so that the protrusion and the winding constitute the above-mentioned mover assembly 8; please refer to Figure 2 In this embodiment, the moving subassembly 8 of the electromagnetic energy harvesting device is directly fixed on the wheel hub 1, which is consistent with the actual working state of the electromagnetic energy harvesting device, so that the power conversion efficiency is closer to or even equal to the actual situation, thereby making the test results more accurate.

[0031] In fact, the valve block 3, the brake disc 4 and the support part can be integrally formed; or, the support part and the valve block 3 can be integrally formed; or, the support part and the brake disc 4 can be integrally formed; or, the valve block 3 and the support part can be detachably connected, and the brake disc 4 can be detachably connected to the support part.

[0032] In fact, the brake disc 4 components in the existing wheel braking device have a complex structure. If the existing brake disc 4 components are fully adopted, the structure of this test device will become complicated. Secondly, in the prior art, when the wheel is braked, the wheel relies on inertia to rotate. When using this test device for testing, the wheel hub 1 requires a driving force to drive it. If real braking is simulated, the braking force of the brake disc 4 components will conflict with the driving force that drives the wheel hub 1 to rotate, which may cause inaccurate testing and damage to the test device.

[0033] See also Figure 1 By providing the spacer 6, a gap is provided between the opposing surfaces of the disc body 5 and the valve block 3, and the gap forms a movable space for the piston rod 7; in fact, the size of the gap can be adjusted by adjusting the length of the spacer 6, thereby ensuring that the stroke of the piston rod 7 meets the requirements after the test device is assembled; on the other hand, by adjusting the size of the gap, the braking conditions of the actual aircraft brake disc 4 under different wear conditions can be simulated.

[0034] In fact, similar to the mover assembly 8, the stator assembly 9 of the existing electromagnetic energy extraction device can be directly installed on the mounting section of the valve block 3; or a protrusion protruding outward from the mounting section can be provided on the mounting section, and a coil is wound on the protrusion, so that the coil and the protrusion constitute the above-mentioned stator assembly 9. Figure 1 In this embodiment, the stator assembly 9 of the electromagnetic energy harvesting device is directly fixed on the mounting section, which is consistent with the actual operation of the electromagnetic energy harvesting device, so that the power conversion efficiency is closer to or even equal to the actual situation, thereby making the test results more accurate.

[0035] In this embodiment, the first motor 11 is used to receive the energy converted by the electromagnetic energy extraction device and drive the piston rod 7 of the hydraulic piston to extend; the first motor 11 can serve as an input device of the electric hydraulic pump, and the electric hydraulic pump is connected to the hydraulic piston through a pipeline. The first motor 11 drives the electric hydraulic pump to operate, and the electric hydraulic pump pumps out high-pressure oil into the hydraulic piston, thereby driving the piston rod 7 to extend.

[0036] During the test, the wheel hub 1 drives the mover assembly 8 to rotate, and the mover assembly 8 and the stator assembly form electromagnetic induction and are converted into electrical energy. The electrical energy is directly supplied to the first motor 11 for use. The first motor 11 drives the electric hydraulic pump to work, realizing the conversion of electrical energy into hydraulic energy. The electric hydraulic pump pumps out high-pressure oil to act on the hydraulic piston, thereby driving the piston rod 7 to extend and abut against the end face of the brake disc 4 facing the valve block 3, realizing the braking action.

[0037] The wheel hub 1 can be driven to rotate by a hydraulic motor, a pneumatic motor, etc. In some embodiments, see Figure 2The test device also includes a second motor 12 for driving the wheel hub 1. The output shaft of the second motor 12 is in transmission connection with the wheel hub 1. This facilitates adjusting the speed of the second motor 12 to simulate the braking conditions of an aircraft landing at different speeds. The second motor 12 can be connected to the wheel hub 1 via a transmission mechanism such as a gear transmission, or the output end of the second motor 12 can be directly connected to the wheel hub 1.

[0038] In some embodiments, the testing device may further include a controller, connected to the pressure sensor provided on the valve block 3 and the second motor 12, respectively. The controller is configured to control the speed of the second motor 12 and to perform closed-loop control of the second motor 12 based on data from the pressure sensor. The controller, which may be a single-chip microcomputer, programmable logic controller, or the like, facilitates controlling the speed of the second motor 12 to simulate aircraft braking conditions at different landing speeds. The speed of the second motor 12 can be set by providing an input device, such as a knob, connected to the controller. Alternatively, the speed of the second motor 12 can be adjusted based on feedback from the pressure sensor to test the critical speed required to meet braking requirements.

[0039] In some embodiments, the valve block 3 has a through-hole for the support portion 2 to pass through, and the valve block 3 is removably mounted on the end of the support portion 2; and / or the spacer 6 of the brake disc 4 is removably connected to the support portion 2. The provision of the through-hole allows for positioning of the valve block 3, and thus the stator assembly 9, to ensure the relative position of the mover assembly 8 and the stator assembly 9. By removably connecting the spacer 6 to the support portion 2, the distance between the brake disc 4 and the valve block 3 can be adjusted by, for example, replacing the spacer 6 with a different length, thereby simulating the braking conditions of a real aircraft brake disc 4 under different wear conditions and different working strokes of the piston rod 7.

[0040] In some embodiments, the support portion 2 has a shoulder section 13 and a neck section 14 that is aligned with the through hole of the valve block 3. The valve block 3 is sleeved on the neck section 14. At least a portion of the end surface of the valve block 3 facing away from the brake disc 4 is aligned with the shoulder section 13. The support portion 2 is also provided with a clamping device for stopping the valve block 3 against the shoulder section 13.

[0041] In fact, the shaft neck section 14 is used to radially position the valve block 3, and the shaft shoulder section 13 cooperates with the clamping device to axially and circumferentially position the valve block 3; the clamping device can be a set screw; in some embodiments, refer to Figure 1The clamping device includes a pressing plate 15 and a first screw 16. The pressing plate 15 includes an end plate abutting against the end of the supporting part 2 and a bushing sleeved outside the shaft neck. One end of the bushing is connected to the end, and the other end of the bushing abuts against the end of the valve block 3 away from the shaft shoulder section 13. The first screw 16 is used to fix the pressing plate 15 on the supporting part 2, thereby fixing the valve block 3 to the supporting part 2.

[0042] In fact, in addition to the above-mentioned purpose of adjusting the spacing distance between the brake disc 4 and the valve block 3 by directly replacing the spacers 6 of different lengths, this purpose can also be achieved in the following ways; for example, when the spacer 6 is detachably connected to the end of the support part 2 where the valve block 3 is set by screws, the screws may include a second screw and a third screw, the spacer 6 or the disc body 5 is provided with a light hole for the second screw to pass through, and the spacer 6 or the disc body 5 is provided with a first threaded hole that is threadably matched with the third screw, the end of the support part 2 where the valve block 3 is set is provided with a second threaded hole that is threadably connected with the second screw, and the second screw Multiple and third screws can be provided, and they are all evenly distributed along the circumference of the disc body 5 or the spacer 6. By rotating the third screw, the third screw abuts against the end of the valve block 3 provided on the support part 2, thereby adjusting the spacing distance between the brake disc 4 and the valve block 3, and then the second screw is used to lock the brake disc 4 to the end of the valve block 3 provided on the support part 2; for another example, an adjusting gasket is provided between the spacer 6 and the end of the valve block 3 provided on the support part 2, and the spacing distance between the brake disc 4 and the valve block 3 can be adjusted by replacing the adjusting gaskets of different thicknesses, or the spacer 6 itself is the adjusting gasket.

[0043] Since the disc 5 is located between the support 2 and the wheel hub 1, if you want to adjust the distance between the brake disc 4 and the valve block 3 from one end of the disc 5, you need to separate the wheel hub 1 from the support 2 first, which takes a long time to adjust. Figure 1 and 3 In some embodiments, the support portion 2 has a cavity for the spacer 6 to pass through, and the end of the spacer 6 facing away from the disc body 5 is detachably connected to the end of the support portion 2 facing away from the valve block 3. That is, the adjustable portion is located at the end away from the contour, so that the distance between the brake disc 4 and the valve block 3 can be adjusted without separating the wheel hub 1 and the support portion 2, shortening the adjustment time. The end of the spacer 6 facing away from the disc body 5 is detachably connected to the end of the support part 2 facing away from the valve block 3, and the screws include a fourth screw 26 and a fifth screw 27. The fourth screw 26 and the fifth screw 27 are evenly distributed along the end of the support part 2 facing away from the valve block 3. The end of the support part 2 facing away from the valve block 3 is respectively provided with a through hole for the fourth screw 26 to pass through and a third threaded hole threadedly matched with the fifth screw 27. The end of the spacer 6 facing away from the disc body 5 is provided with a fourth threaded hole threadedly matched with the fourth screw 26; the fifth screw 27 abuts against the end of the spacer 6 facing away from the disc body 5, so that the spacing distance between the brake disc 4 and the valve block 3 is adjusted by rotating the fifth screw 27, and then the spacer 6 is locked on the support part 2 by the fourth screw 26.

[0044] In some embodiments, the central axis of the hub 1 is collinear with the central axis of the support portion 2 , thereby ensuring a more accurate relative position of the movable assembly 8 and the stator assembly 9 .

[0045] In fact, to ensure that the center axis of the hub 1 and the center axis of the support 2 are collinear, refer to Figure 1 In some embodiments, the testing device may further include a first bracket 17 and a second bracket 18 disposed opposite the first bracket 17. The wheel hub 1 is rotatably mounted on the first bracket 17, and the end of the support portion 2 facing away from the valve block 3 is fixedly mounted on the second bracket 18. The first bracket 17 and the second bracket 18 are both provided with holes at corresponding positions for a pin 19 to pass through. The pin 19 is used to keep the central axis of the wheel hub 1 and the central axis of the support portion 2 collinear. Figure 2 The first bracket 17 has a bearing hole, in which a bearing 22 is installed. The bearing hole also has a shoulder and a retaining ring 23 to limit the axial movement of the bearing 22. The wheel hub 1 has a rotating shaft inserted into the inner ring of the bearing 22; the rotating shaft has a through hole for the output shaft of the second motor 12 to be inserted, and a shaft retaining ring 24 is set on the output shaft of the second motor 12 to limit the axial movement of the wheel hub 1; a flat key 25 is set between the rotating shaft hole and the output shaft of the second motor 12, and the flat key 25 is used to transmit torque; the second motor 12 is fixed to the first bracket 17. Figure 3 , support part 2 is inserted into the inner hole of second bracket 18 until the flange of support part 2 is in contact with second bracket 18, and then fixed with screws. Since the hole of first bracket 17 and the bearing hole are both located in first bracket 17, the center distance between the two can be guaranteed through machining. Similarly, the hole of second bracket 18 and the inner hole of second bracket 18 are both located in second bracket 18, so the center distance between the two can also be guaranteed through machining. Therefore, by inserting pin rod 19 into the hole of first bracket 17 and the hole of second bracket 18 respectively, the bearing hole and the inner hole of second bracket 18 can be guaranteed to be coaxial, thereby ensuring that the central axis of wheel hub 1 and the central axis of support part 2 are collinear.

[0046] In some embodiments, see Figure 1 The test device also includes a base plate, with a stopper 21 protruding from the center. The first bracket 17 and the second bracket 18 are positioned on opposite sides of the stopper 21, and the first bracket 17 and the second bracket 18 are respectively aligned with the side surfaces of the corresponding stopper 21. The stopper 21 controls the axial distance and position of the first bracket 17 and the second bracket 18, thereby controlling the relative position of the movable assembly 8 and the stator assembly 9. The first bracket 17 and the second bracket 18 can be secured to the base plate using screws or the like.

[0047] In some embodiments, see Figure 1Valve block 3 is also provided with an oil tank 20 connected to the hydraulic piston. The oil in tank 20 is pressurized by a pump driven by first motor 11 and drives the piston rod 7 of the hydraulic piston. Therefore, by testing the oil pressure, it is possible to indirectly test whether the energy converted from electromagnetic self-feeding is sufficient to achieve braking and whether braking can be achieved under various aircraft wheel operating conditions. It is understood that a brake control valve can be provided between the hydraulic piston and the oil tank. Specifically, the hydraulic piston is connected to the brake control valve, which is in turn connected to the hydraulic piston. The controller can control the brake control valve to relieve pressure on the hydraulic piston.

[0048] The working principle of the test device of this embodiment is:

[0049] During the test, power is supplied to the second motor 12, converting electrical energy into mechanical energy, which is then output in the form of rotational speed and torque. Since the wheel hub 1 and the second motor 12 are rigidly connected by a flat key 25, the torque and rotational speed output by the second motor 12 are directly transmitted to the wheel hub 1. Simultaneously, the electromagnetic energy extraction device's movable element 8 is rigidly connected to the wheel hub 1 by screws. During this time, movable element 8 also rotates circumferentially at the same rotational speed. The stator assembly 9 is fixed to the valve block 3 and is stationary. Electromagnetic induction between movable element 8 and the stator assembly converts this energy into electrical energy, which is directly supplied to the first motor 11. The first motor 11 drives the pump, converting electrical energy into hydraulic energy. The pump draws oil from the oil tank 20 and discharges high-pressure oil, which acts on the hydraulic piston. Under the action of the oil, the piston rod 7 of the hydraulic piston extends out of the valve block 3 until it contacts the disc 5 of the brake disc 4, thus applying the brake. After braking, the controller controls the brake control valve to reverse direction, relieving pressure from the hydraulic piston, causing the piston rod 7 to retract to its original position.

[0050] During the test, the output speed of the second motor 12 can be controlled to simulate the braking conditions of an aircraft at different landing speeds. Simultaneously, closed-loop control of the speed of the second motor 12 is performed using a pressure sensor to simulate the braking conditions throughout the entire aircraft landing and stopping process. The distance between the brake disc 4 and the valve block 3 can be adjusted to control the distance between the piston rod 7 and the opposing surface of the disc body 5, simulating the braking conditions of a real aircraft brake disc 4 under different wear conditions and the hydraulic piston rod 7 under different working strokes.

[0051] It is understandable that the wheel hub described in the embodiment of the present invention is not limited to the wheel hub of an aircraft wheel, but is also applicable to the electromagnetic self-feeding test of automobile wheels or other transportation vehicles, such as trains, special transportation vehicles, roller coasters, etc.

[0052] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0054] It should be understood by those skilled in the art that the above embodiments are merely for the purpose of illustrating the present invention clearly, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and such changes or modifications are still within the scope of the present invention.

Claims

1. A testing device, characterized in that: Used for testing electromagnetic self-feeding, the test device includes a wheel hub, an electromagnetic energy extraction device, a support portion, a valve block, and a brake disc spaced relative to the valve block. The brake disc includes a disc body and a spacer protruding from the disc body. The valve block is located at an end of the support portion, and the end of the spacer facing away from the disc body is connected to the support portion. At least one hydraulic piston is provided on the valve block, and the piston rod of the hydraulic piston is used to stop at the end surface of the disc body opposite to the valve block; The electromagnetic energy extraction device includes a mover assembly and a stator assembly coordinated with the mover assembly, the mover assembly is fixedly connected to the wheel hub, the movers of the mover assembly are distributed along the circumference of the wheel hub, the valve block has a stator mounting section opposite to the inner side surfaces of the movers, and the stators of the stator assembly are fixedly distributed on the outer circumferential surface of the stator mounting section; The testing device further includes a first motor electrically connected to the electromagnetic energy extraction device, and the first motor is drivingly connected to each of the hydraulic pistons; The testing device further includes a second motor that drives the wheel hub to rotate, and an output shaft of the second motor is drivingly connected to the wheel hub; The testing device further includes a controller, the controller being connected to the pressure sensor provided on the valve block and the second motor, respectively, the controller being used to control the speed of the second motor, and the controller being further used to perform closed-loop control on the second motor according to data from the pressure sensor; The valve block has a through hole for the support portion to pass through, and the valve block is detachably sleeved on the end of the support portion; and / or, The spacer portion of the brake disc is detachably connected to the support portion.

2. The testing device according to claim 1, wherein: The supporting portion comprises a shaft shoulder section and a shaft neck section coordinated with the through hole of the valve block, the valve block is sleeved on the shaft neck section, at least a portion of the end surface of the valve block facing away from the brake disc is coordinated with the shaft shoulder section, and the supporting portion is further provided with a clamping device for stopping the valve block against the shaft shoulder section; and / or, The spacer is detachably connected to the end of the support portion where the valve block is provided, or the support portion has a cavity for the spacer to pass through, and the end of the spacer away from the disc body is detachably connected to the end of the support portion away from the valve block.

3. The testing device according to claim 1, wherein: The central axis of the hub is collinear with the central axis of the support portion.

4. The testing device according to claim 1, wherein: The testing device further includes a first bracket and a second bracket arranged opposite to the first bracket, the hub is rotatably mounted on the first bracket, and the end of the support portion facing away from the valve block is fixedly mounted on the second bracket; The first bracket and the second bracket are both provided with holes at corresponding positions for pins to pass through, and the pins are used to keep the central axis of the hub and the central axis of the support portion collinear.

5. The testing device according to claim 4, wherein: The testing device also includes a base plate, a limiting boss protruding from the base plate is provided in the middle of the base plate, the first bracket and the second bracket are respectively arranged on opposite sides of the limiting boss, and the first bracket and the second bracket are respectively fitted with the side surfaces of the corresponding limiting boss.

6. The testing device according to claim 1, wherein: The valve block is further provided with an oil tank connected to the hydraulic piston. The oil in the oil tank is pressurized by a pump driven by the first motor and drives the piston rod of the hydraulic piston.

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