Device for detecting compression resistance of frame of electric vehicle

Abstract

An electric vehicle frame compression resistance detection device comprises an eccentric vibration generation assembly and an electromagnetic driving assembly. The electromagnetic driving assembly is configured to drive the eccentric vibration generating assembly, and the eccentric vibration generating assembly is configured to apply variable vibration to the electric vehicle frame; the eccentric vibration generating assembly comprises a rotating shaft and eccentric wheels, the eccentric wheels are fixedly arranged at the two ends of the rotating shaft, and a frame connecting shaft sleeve is arranged on the rotating shaft and used for being connected with the axle position of an electric vehicle frame. The electromagnetic driving assembly comprises a fixed U-shaped magnet and a driving coil, a magnetic pole gap is formed in the fixed U-shaped magnet, two magnetic poles of the fixed U-shaped magnet are located on the two sides of the magnetic pole gap respectively, the driving coil is fixedly arranged on the rotating shaft, variable vibration loads can be generated through cooperation of the rotating shaft and the eccentric wheel, and after the electric vehicle frame is fixedly connected, the vibration loads can be changed. And the dynamic stress of the electric vehicle in the driving process is simulated.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle detection, and specifically refers to a device for detecting the compressive performance of an electric vehicle frame. Background Art

[0002] As the main load-bearing structure of an electric vehicle, the design and performance of the frame directly affect the safety and service life of the whole vehicle. During the manufacturing and detection process of the frame, the compressive performance is an important indicator to evaluate its structural strength. Especially at the position where the frame installs the axle, due to bearing the direct loads of the wheels and the axle, it is the area with the most significant stress concentration, and also the part where deformation and fatigue damage are most likely to occur in the frame design.

[0003] Existing frame compressive performance detection devices mainly focus on static tests, and evaluate the compressive strength of the frame by applying a constant load; however, in actual use, the electric vehicle will be subjected to dynamic loads from complex road conditions during driving, such as bumps, impacts, and vibrations, etc. These dynamic factors have an important impact on the fatigue performance and deformation characteristics of the frame after long-term use; the traditional static detection method cannot comprehensively reflect the dynamic compressive performance of the frame under real working conditions.

[0004] In addition, some existing dynamic test devices are mostly used for vibration tests of the whole vehicle or wheels, and it is difficult to conduct accurate dynamic compressive tests on the specific position where the frame installs the axle. Summary of the Invention

[0005] In view of the above situation, to overcome the defects of the existing technology, the present invention provides a device for detecting the compressive performance of an electric vehicle frame to at least partially solve the above technical problems.

[0006] The technical solution adopted by the present invention is as follows: The present invention provides a device for detecting the compressive performance of an electric vehicle frame, including an eccentric vibration generating component and an electromagnetic driving component. The electromagnetic driving component is configured to drive the eccentric vibration generating component, and the eccentric vibration generating component is configured to apply variable vibrations to the electric vehicle frame; the eccentric vibration generating component includes a rotating shaft and eccentric wheels, the eccentric wheels are fixedly arranged at both ends of the rotating shaft, and a frame connecting bushing is provided on the rotating shaft, and the frame connecting bushing is used to connect the axle position of the electric vehicle frame; the electromagnetic driving component includes a fixed U-shaped magnet and a driving coil, a magnetic pole gap is provided on the fixed U-shaped magnet, and the two magnetic poles of the fixed U-shaped magnet are respectively located on both sides of the magnetic pole gap, and the driving coil is fixedly arranged on the rotating shaft; The rotating shaft and the driving coil are arranged in the magnetic pole gap, an alternating current is passed through the driving coil, and the electromagnetic force received by the driving coil in the magnetic pole gap drives the rotating shaft to rotate.

[0007] Further, the electromagnetic drive assembly further includes a conductive slip ring and a fixed wire. The conductive slip ring is configured to supply power to the drive coil. The conductive slip ring is disposed on the rotating shaft. One side of the conductive slip ring is fixedly connected to the rotating shaft, and the other side is fixedly connected to an external AC power supply. The two ends of the fixed wire are respectively connected to the conductive slip ring and the drive coil, and the fixed wire is attached to the surface of the rotating shaft.

[0008] Further, the eccentric vibration generating assembly further includes a lifting tabletop. The eccentric wheel remains in contact with the lifting tabletop, and an eccentric wheel notch is provided on the eccentric wheel.

[0009] Further, the eccentric vibration generating assembly further includes a hydraulic lift. The lifting tabletop is disposed on the piston rod of the hydraulic lift. The hydraulic lift controls the lifting of the lifting tabletop, and anti-slip strips are provided on the upper surface of the lifting tabletop.

[0010] Further, the electromagnetic drive assembly further includes a slip ring base and a buffer spring. The buffer spring is disposed on the slip ring base, and the conductive slip ring is disposed on the buffer spring. The conductive slip ring and the buffer spring are rotatably connected.

[0011] Further, the eccentric vibration generating assembly further includes an accumulator. The accumulator is disposed on the hydraulic lift, and the accumulator is communicated with the rodless cavity of the hydraulic lift.

[0012] Further, a vehicle frame support assembly is further included. The vehicle frame support assembly includes a bottom bracket and a vertical pillar. The eccentric vibration generating assembly and the electromagnetic drive assembly are disposed on the bottom bracket. The vertical pillar is disposed on the bottom bracket, and a vehicle frame support roller is provided on the vertical pillar. The vehicle frame support roller is configured to support the electric vehicle frame.

[0013] Further, the vehicle frame support assembly further includes a sliding lock. A vertical sliding groove is provided on the vertical pillar, and the sliding lock is slidably disposed in the vertical sliding groove. The vehicle frame support roller is disposed on the sliding lock. A bottom sliding groove is provided on the bottom bracket, and the vertical pillar is slidably disposed in the bottom sliding groove.

[0014] Compared with the prior art, the present invention has the following advantages: Through the cooperation of the rotating shaft and the eccentric wheel, the present invention can generate variable vibration loads. After the electric vehicle frame is fixedly connected, the dynamic force during the driving process of the electric vehicle is simulated. At the same time, the combination of the hydraulic lift and the accumulator can control the lifting amplitude of the lifting tabletop by adjusting the pressure of the hydraulic lift, thereby accurately controlling the vibration amplitude and frequency, simulating the driving conditions of the electric vehicle on different road surfaces, improving the authenticity of the test, and enabling a more comprehensive test of the dynamic compressive performance of the electric vehicle frame under different vibration environments.

[0015] The electromagnetic drive assembly proposed by the present invention adopts components such as a fixed U-shaped magnet, a drive coil, and a conductive slip ring, and uses electromagnetic force to drive the rotating shaft to rotate, avoiding the problem of contact wear in traditional mechanical drives, and improving the stability and service life of the system; the conductive slip ring realizes the electrical connection of the rotating components, replacing the wire of the external power supply, avoiding the phenomenon of wire entanglement during the rotation of the rotating shaft, and ensuring the continuous and stable operation of the system. Description of the Drawings

[0016] Figure 1 A three-dimensional view of a device for detecting the compressive performance of an electric vehicle frame proposed in an embodiment of the present invention Figure 1 ; Figure 2 The front view of a device for detecting the compressive performance of an electric vehicle frame proposed in an embodiment of the present invention; Figure 3 The right view of a device for detecting the compressive performance of an electric vehicle frame proposed in an embodiment of the present invention; Figure 4 The top view of a device for detecting the compressive performance of an electric vehicle frame proposed in an embodiment of the present invention; Figure 5 For Figure 4 The enlarged view of part I in Figure 6 A three-dimensional view of a device for detecting the compressive performance of an electric vehicle frame proposed in an embodiment of the present invention Figure 2 ; Figure 7 For Figure 6 The enlarged view of part II in

[0017] Among them, 100, eccentric vibration generating assembly; 200, electromagnetic drive assembly; 300, vehicle frame support assembly; 101, rotating shaft; 102, eccentric wheel; 103, lifting table; 104, vehicle frame connecting bushing; 105, eccentric wheel notch; 106, anti-slip strip; 107, hydraulic lift; 108, energy storage device; 201, fixed U-shaped magnet; 202, drive coil; 203, conductive slip ring; 204, slip ring base; 205, magnetic pole gap; 206, fixed wire; 207, buffer spring; 301, bottom bracket; 302, vertical pillar; 303, sliding lock; 304, bottom chute; 305, vertical chute; 306, vehicle frame support roller.

[0018] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. Detailed Embodiments

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0021] As Figures 1 - 7 shown, this embodiment includes an eccentric vibration generating assembly 100 and an electromagnetic driving assembly 200. The electromagnetic driving assembly 200 is configured to drive the eccentric vibration generating assembly 100, and the eccentric vibration generating assembly 100 is configured to apply a changing vibration to the electric vehicle frame. By fixedly connecting the electric vehicle frame to the eccentric vibration generating assembly 100, the eccentric vibration generating assembly 100 can drive the electric vehicle frame to vibrate at a high frequency, thereby applying a changing load to the electric vehicle frame and realizing the dynamic compressive strength detection of the electric vehicle frame.

[0022] The eccentric vibration generating assembly 100 includes a rotating shaft 101 and eccentric wheels 102. The eccentric wheels 102 are fixedly arranged at both ends of the rotating shaft 101. A frame connecting bushing 104 is provided on the rotating shaft 101. The frame connecting bushing 104 is used to connect to the axle position of the electric vehicle frame. Specifically, when in use, the axle of the electric vehicle frame is connected to the frame connecting bushing 104. Subsequently, the electromagnetic driving assembly 200 drives the rotating shaft 101 to rotate. When the rotating shaft 101 rotates under the driving action, the eccentric wheels 102 generate an unbalanced force due to the eccentric mass distribution. This force acts on the rotating shaft 101, causing it to swing, and the vibration force is directly applied to the axle position through the electric vehicle frame connected to the bushing 104. The eccentric vibration generating assembly 100 can not only provide stable vibration but also realize the targeted evaluation of the dynamic compressive strength performance of the frame.

[0023] The electromagnetic drive assembly 200 includes a fixed U-shaped magnet 201 and a drive coil 202. A magnetic pole gap 205 is provided on the fixed U-shaped magnet 201. The two magnetic poles of the fixed U-shaped magnet 201 are respectively located on both sides of the magnetic pole gap 205. The drive coil 202 is fixedly arranged on the rotating shaft 101. The rotating shaft 101 and the drive coil 202 are arranged in the magnetic pole gap 205. An alternating current passes through the drive coil 202. The electromagnetic force received by the drive coil 202 in the magnetic pole gap 205 drives the rotating shaft 101 to rotate. By driving the rotating shaft 101 through electromagnetic force without making physical contact with the rotating shaft 101, the rotating shaft 101 can swing freely, avoiding the problems of frictional loss and accuracy decline in traditional mechanical drives, and at the same time ensuring the purity of vibration loading and the operating stability of the system.

[0024] The electromagnetic drive assembly 200 proposed in this embodiment further includes a conductive slip ring 203 and a fixed wire 206. The conductive slip ring 203 is configured to supply power to the drive coil 202. The conductive slip ring 203 is arranged on the rotating shaft 101. One side of the conductive slip ring 203 is fixedly connected to the rotating shaft 101, and the other side is fixedly connected to an external AC power supply. The drive coil 202 and the external power supply are connected through the conductive slip ring 203 to realize the electrical connection of the rotating component, replacing the wire of the external power supply and avoiding the phenomenon of wire entanglement during the rotation of the rotating shaft 101, ensuring the continuous and stable operation of the system.

[0025] At the same time, both the conductive slip ring 203 and the drive coil 202 are arranged on the rotating shaft 101. The wire between the conductive slip ring 203 and the drive coil 202 is attached to the surface of the rotating shaft 101, making the power supply system more compact, avoiding mechanical friction of the wire, and enhancing the stability and efficiency of the system.

[0026] The eccentric vibration generating assembly 100 proposed in this embodiment further includes a lifting table 103. The eccentric wheel 102 is in contact with the lifting table 103. An eccentric wheel notch 105 is provided on the eccentric wheel 102. During specific use, the rotation of the rotating shaft 101 causes the eccentric wheel 102 to roll on the lifting table 103. Since the eccentric wheel 102 is in an eccentric state, when the eccentric wheel 102 rolls on the fixed lifting table 103, a biasing force will be generated on the rotating shaft 101, causing the rotating shaft 101 to swing. When the rotating shaft 101 swings, it drives the electric vehicle frame connected to the vehicle frame connecting bushing 104 to vibrate.

[0027] The conductive slip ring 203 and the drive coil 202 are jointly installed on the rotating shaft 101. The wire is closely attached to the surface of the rotating shaft, reducing the wire swing. At the same time, the reliability of the power connection is improved, ensuring that the power can be stably transmitted to the drive coil 202, providing continuous power for the electromagnetic drive assembly 200, so that the rotating shaft 101 can operate stably and complete the dynamic compressive performance test of the electric vehicle frame; not only improving the working efficiency of the system, but also extending the service life of the equipment, making the electromagnetic drive assembly 200 more compact and stable, and providing more reliable power support for the dynamic compressive detection of the electric vehicle frame.

[0028] The eccentric vibration generating assembly 100 proposed in this embodiment further includes a hydraulic lift 107. The lifting table 103 is provided on the piston rod of the hydraulic lift 107. The introduction of the hydraulic lift 107 enables the lifting table 103 to adjust the distance from the rotating shaft 101 as needed, thereby precisely controlling the swing amplitude of the rotating shaft 101 and the vibration frequency of the electric vehicle frame; during use, according to the dynamic test requirements of the electric vehicle frame, the hydraulic lift 107 can change the intensity and frequency of the applied eccentric vibration by adjusting the height of the lifting table 103. This adjustment function enables the present invention to flexibly adjust the vibration parameters according to different test standards or vehicle types, ensuring the diversity and accuracy of the compressive performance test of the electric vehicle frame.

[0029] Anti-slip strips 106 are provided on the upper surface of the lifting table 103 to ensure that the electric vehicle frame will not slide or shift in position due to vibration during the test, thus ensuring the stability and accuracy of the test. The anti-slip strips 106 enhance the friction between the electric vehicle frame and the lifting table 103, helping to better fix the frame and ensuring that each vibration during the test can be accurately transmitted to the frame. Through the precise control of the hydraulic lift 107 and the anti-slip effect of the anti-slip strips 106, this embodiment provides an efficient, stable and adjustable vibration generating platform, which not only ensures the reliability of the dynamic compressive test of the electric vehicle frame, but also improves the operability and adaptability of the system during the test.

[0030] The electromagnetic drive assembly 200 proposed in this embodiment further includes a slip ring base 204 and a buffer spring 207. The buffer spring 207 is provided on the slip ring base 204, and the conductive slip ring 203 is provided on the buffer spring 207. The conductive slip ring 203 is rotatably connected to the buffer spring 207. The movable setting of the conductive slip ring 203 is realized through the buffer spring 207. When the rotating shaft 101 swings, the conductive slip ring 203 can move synchronously with the rotating shaft 101, ensuring that the drive coil 202 and the conductive slip ring 203 always maintain a connected state, avoiding the interruption of the electrical connection caused by vibration or swing.

[0031] The buffer spring 207 provides elastic support, enabling the conductive slip ring 203 to compensate for possible offsets caused by changes in the swing amplitude of the rotating shaft during the swinging process, thereby ensuring the continuity and stability of the power connection. The conductive slip ring 203 can maintain a stable electrical connection with the external power supply, avoiding poor contact caused by rotation or vibration, ensuring the normal operation of the drive coil 202, and further improving the reliability of the electromagnetic drive assembly 200.

[0032] The eccentric vibration generating assembly 100 proposed in this embodiment further includes an accumulator 108. The accumulator 108 is provided on the hydraulic lift 107 and is connected to the rodless cavity of the hydraulic lift 107. By controlling the pressure in the hydraulic cylinder body of the hydraulic lift 107 through the accumulator 108, the lifting table 103 can push the hydraulic rod of the hydraulic lift 107 to move slightly when pressed, simulating the driving condition of an electric vehicle on a relatively soft road surface, thereby providing a more diverse vibration simulation for the dynamic compressive test of the electric vehicle frame.

[0033] The accumulator 108 provides a dynamic pressure feedback mechanism, enabling the hydraulic lift 107 to make fine adjustments according to different load conditions, simulating the dynamic performance of an electric vehicle under various road surface conditions; by adjusting the pressure in the hydraulic cylinder body, the accumulator 108 can make the movement of the lifting table 103 more delicate, simulating the response of an electric vehicle on a relatively soft road surface, and further improving the authenticity and reliability of the test results.

[0034] This embodiment further includes a frame support assembly 300. The frame support assembly 300 includes a bottom bracket 301 and a vertical pillar 302. The eccentric vibration generating assembly 100 and the electromagnetic drive assembly 200 are provided on the bottom bracket 301. The vertical pillar 302 is provided on the bottom bracket 301, and a frame support roller 306 is provided on the vertical pillar 302. The frame support roller 306 is configured to support the electric vehicle frame, ensuring the stability of the electric vehicle frame during the vibration test.

[0035] The frame support roller 306 can bear the weight of the electric vehicle frame, and through its precise support, the electric vehicle frame can maintain its original posture and stability during the dynamic compressive test; the design of the support roller 306 ensures that the frame will not tilt or become unstable when receiving vibration loads, guaranteeing the accuracy of the vibration test; in addition, the surface material of the frame support roller 306 is rubber, which has good wear resistance and friction, effectively preventing the frame from sliding or shifting during vibration.

[0036] The frame support assembly 300 proposed in this embodiment further includes a sliding lock 303. A vertical chute 305 is provided on the vertical pillar 302. The sliding lock 303 is slidably disposed in the vertical chute 305. The frame support roller 306 is disposed on the sliding lock 303. A bottom chute 304 is provided on the bottom bracket 301. The vertical pillar 302 is slidably disposed in the bottom chute 304. By sliding the vertical pillar 302 in the bottom chute 304 and sliding the sliding lock 303 in the vertical chute 305, the position and height of the frame support roller 306 can be changed to be applicable to electric vehicle frames of different sizes.

[0037] In addition, after the sliding lock 303 is adjusted to the required position, the relative positions of the vertical pillar 302 and the sliding lock 303 can be fixed through a locking mechanism, thereby ensuring that the frame support roller 306 does not accidentally displace during the test, guaranteeing the accuracy and stability of the test.

[0038] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0039] The above describes the present invention and its embodiments. Such description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and design similar structural modes and embodiments to this technical solution without creative efforts without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. An electric vehicle frame compressive performance detection device, characterized in that: It includes an eccentric vibration generating component (100) and an electromagnetic driving component (200); The eccentric vibration generating component (100) includes a rotating shaft (101) and eccentric wheels (102). The eccentric wheels (102) are fixedly arranged at both ends of the rotating shaft (101). A frame connecting bushing (104) is provided on the rotating shaft (101), and the frame connecting bushing (104) is used to connect to the axle position of the electric vehicle frame; The electromagnetic driving component (200) includes a fixed U-shaped magnet (201) and a driving coil (202). A magnetic pole gap (205) is provided on the fixed U-shaped magnet (201). The two magnetic poles of the fixed U-shaped magnet (201) are respectively located on both sides of the magnetic pole gap (205). The driving coil (202) is fixedly arranged on the rotating shaft (101); The rotating shaft (101) and the driving coil (202) are arranged in the magnetic pole gap (205). An alternating current is passed through the driving coil (202), and the electromagnetic force received by the driving coil (202) in the magnetic pole gap (205) drives the rotating shaft (101) to rotate.

2. The electric vehicle frame compressive performance detection device according to claim 1, wherein: The electromagnetic driving component (200) further includes a conductive slip ring (203) and a fixed wire (206). The conductive slip ring (203) is configured to supply power to the driving coil (202). The conductive slip ring (203) is arranged on the rotating shaft (101). One side of the conductive slip ring (203) is fixedly connected to the rotating shaft (101), and the other side is fixedly connected to an external alternating current power supply; Both ends of the fixed wire (206) are respectively connected to the conductive slip ring (203) and the driving coil (202), and the fixed wire (206) is attached to the surface of the rotating shaft (101).

3. The electric vehicle frame compressive performance detection device according to claim 1, wherein: The eccentric vibration generating component (100) further includes a lifting table surface (103). The eccentric wheel (102) is in contact with the lifting table surface (103), and an eccentric wheel notch (105) is provided on the eccentric wheel (102).

4. The electric vehicle frame compressive performance detection device according to claim 3, wherein: The eccentric vibration generating component (100) further includes a hydraulic lift (107). The lifting table surface (103) is arranged on the piston rod of the hydraulic lift (107). The hydraulic lift (107) controls the lifting of the lifting table surface (103). Anti-slip strips (106) are provided on the upper surface of the lifting table surface (103).

5. The electric vehicle frame compressive performance detection device according to claim 2, wherein: The electromagnetic driving component (200) further includes a slip ring base (204) and a buffer spring (207). The buffer spring (207) is arranged on the slip ring base (204). The conductive slip ring (203) is arranged on the buffer spring (207), and the conductive slip ring (203) is rotatably connected to the buffer spring (207).

6. The electric vehicle frame compressive performance detection device according to claim 4, wherein: The eccentric vibration generating component (100) further includes an energy storage device (108). The energy storage device (108) is arranged on the hydraulic lift (107), and the energy storage device (108) is communicated with the rodless cavity of the hydraulic lift (107).

7. The electric vehicle frame compressive performance detection device according to claim 1, characterized in that: It further includes a frame support assembly (300). The frame support assembly (300) includes a bottom bracket (301) and a vertical support (302). The eccentric vibration generating assembly (100) and the electromagnetic drive assembly (200) are disposed on the bottom bracket (301). The vertical support (302) is disposed on the bottom bracket (301). A frame support roller (306) is provided on the vertical support (302), and the frame support roller (306) is configured to support an electric vehicle frame.

8. The electric vehicle frame compressive performance detection device according to claim 7, wherein: The frame support assembly (300) further includes a sliding lock (303). A vertical sliding groove (305) is provided on the vertical support (302). The sliding lock (303) is slidably disposed in the vertical sliding groove (305), and the frame support roller (306) is disposed on the sliding lock (303); A bottom sliding groove (304) is provided on the bottom bracket (301), and the vertical support (302) is slidably disposed in the bottom sliding groove (304).

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