A durability test device for electric drive axle of new energy vehicle

Abstract

This invention relates to the field of new energy vehicle testing technology and discloses a durability testing device for electric drive axles of new energy vehicles. The invention includes a base, a support platform, testing components, and a positioning structure. A screw drives a moving block to engage a fixed-distance structure with the workpiece. The positioning structure, through multi-stage gear transmission, drives an arc block closer to the workpiece. An anti-detachment structure achieves adaptive positioning through rolling contact pressing of rollers one and two. The testing components simultaneously rotate at high speed on two sets of workpieces to complete the durability test. This invention improves the versatility and adaptability of the device, ensures testing accuracy and efficiency, and can be widely applied to mass production and R&D testing of electric drive axles.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle testing technology, and in particular to a durability testing device for electric drive axles of new energy vehicles. Background Technology

[0002] As a core powertrain component, the electric drive axle of new energy vehicles directly determines the reliability and service life of the entire vehicle through its high-speed continuous operation durability. Consequently, the industry's requirements for the versatility, accuracy, and efficiency of its testing equipment are constantly increasing. Existing electric drive axle durability testing equipment mostly employs a single loading platform or a simple clamping structure, which can only accommodate workpieces of a single size. Changing models requires frequent tooling changes, which is time-consuming and labor-intensive. Furthermore, the clamping and positioning often uses rigid contact, which can easily scratch the workpiece surface. Simultaneously, it is difficult to achieve multi-directional synchronous clamping, and workpiece misalignment and slippage are prone to occur during testing, leading to distorted test results. These methods cannot meet the needs of batch testing and precise R&D testing for multiple electric drive axle models.

[0003] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: Existing testing devices generally have the problem of separation between loading and positioning structures, which makes it impossible to simultaneously complete the workpiece position adjustment and precise positioning. This easily leads to deviations in the docking between the workpiece and the test component, affecting the stability of the working conditions under high-speed continuous operation testing. It is difficult to cope with the testing requirements of electric drive axle workpieces with different shapes. Moreover, a single device can only test a single set of workpieces, resulting in low testing efficiency. It cannot adapt to the quality inspection requirements of large-scale mass production in the industry, thus restricting the research and development and mass production process of electric drive axle products for new energy vehicles. Summary of the Invention

[0004] The technical problem to be solved by this invention is the shortcomings of existing durability testing devices for electric drive axles of new energy vehicles. To address this, we propose a durability testing device for electric drive axles of new energy vehicles.

[0005] To achieve the above objectives, this application adopts the following technical solution: a durability testing device for an electric drive axle of a new energy vehicle, comprising a base, a support platform disposed above the base, and a testing component disposed above the support platform. An adjustment structure is provided on one side of the base. The adjustment structure includes a fixed shell disposed on one side of the base, a drive assembly disposed inside the fixed shell, and a moving block slidably connected to the inside of the fixed shell in the opposite direction. A fixed-distance structure is provided on one side of the moving block. The fixed-distance structure includes a long shell disposed on one side of the moving block, a moving assembly disposed inside the long shell, and a receiving block slidably connected to the inside of the long shell in the opposite direction. A support platform is provided on one side of the receiving block, a fixed frame is provided on one side of the support platform, and a positioning structure is provided on one side of the fixed frame. The positioning structure includes a circular shell provided on one side of the fixed frame. An adjusting component is rotatably connected inside the circular shell. The adjusting component includes an arc block slidably connected to the outside of the circular shell. An anti-detachment structure is provided on one side of the arc block. The anti-detachment structure includes an embedded block provided on one side of the arc block. A transmission block is slidably connected to one side of the embedded block. A roller is rotatably connected to one side of the transmission block. The roller is obliquely distributed. A rack is slidably connected to one side of the embedded block. A roller is rotatably connected to one side of the rack.

[0006] Preferably, the drive assembly includes a bidirectional motor disposed on one side of the fixed housing, and the two ends of the bidirectional motor are provided with screws, which are threadedly connected to the moving block.

[0007] Preferably, a connecting block is provided on one side of the movable block, the connecting block is connected to the long shell, and a long plate is provided on one side of the base, with a slider slidably connected to the top of the long plate, the slider being connected to the long shell.

[0008] Preferably, the moving component includes a servo motor disposed on one side of the long shell, and the output end of the servo motor is rotatably connected to the long shell.

[0009] Preferably, the output end of the long shell is provided with a gear, and the fixed-distance structure is internally slidably connected with a rack, which is connected to the receiving block.

[0010] Preferably, the adjustment component includes a motor disposed inside the circular shell, a second gear being disposed at the output end of the motor, and a sun gear being rotatably connected inside the circular shell, the sun gear being meshed with the second gear.

[0011] Preferably, a planetary gear is rotatably connected inside the circular shell, and four sets of planetary gears are evenly distributed. A rack is slidably connected to the outside of the circular shell, and the rack meshes with the planetary gears and is connected to the arc block.

[0012] Preferably, the surface of the embedded block is provided with a groove, and a gear three is rotatably connected inside the groove, with lead screws provided on both sides of the gear three.

[0013] Preferably, the transmission block is threadedly connected to the lead screw, and an extension block is provided on one side of the transmission block, which is connected to the roller.

[0014] Preferably, the gear three meshes with the rack four, the transmission block rotates in the opposite direction, and there are two sets of transmission blocks symmetrically distributed about the gear three, with the two sets of transmission blocks sliding in opposite directions.

[0015] The technical effects and advantages of this invention are as follows: In this invention, a bidirectional motor and screw linkage with an adjustable-distance structure, in conjunction with a servo motor and gear rack with a fixed-distance structure, achieve precise and rapid position adjustment of the support platform and the workpiece. This improves the device's adaptability to workpieces of different sizes driven by electric drive bridges, reducing tooling change costs and time losses. The multi-stage gear transmission of the positioning structure drives the arc block for synchronous feeding, while the rollers of the anti-slip structure provide rolling contact clamping, enhancing the stability and uniformity of workpiece positioning and preventing workpiece misalignment and slippage during testing. This ensures the accuracy and reliability of high-speed continuous durability testing results. This invention improves the testing efficiency and capacity utilization of a single device through a dual-workpiece synchronous testing structure, while reducing the time and energy costs of batch testing. Through the modular design of each structure and the sliding and meshing connection methods, it enhances the ease of assembly and maintenance of the device, extends the service life of the equipment, and meets the diverse needs of mass production quality inspection and R&D testing in the industry. Attached Figure Description

[0016] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the adjustable distance structure, fixed distance structure, support platform, positioning structure and anti-detachment structure of the present invention; Figure 3 This is a schematic diagram of the three-dimensional unfolded structure of the adjustment structure of the present invention; Figure 4 This is a three-dimensional structural diagram of the fixed-distance structure of the present invention; Figure 5 This is a three-dimensional unfolded structural diagram of the support platform and positioning structure of the present invention; Figure 6 This is a three-dimensional structural diagram of the anti-detachment structure of the present invention.

[0017] Legend: 1. Base; 2. Support platform; 3. Test component; 4. Adjustable distance structure; 41. Fixed shell; 42. Bidirectional motor; 43. Screw; 44. Moving block; 45. Connecting block; 46. Long plate; 47. Slider; 5. Fixed distance structure; 51. Long shell; 52. Servo motor; 53. Gear 1; 54. Rack 1; 55. Support block; 6. Bearing platform; 7. Fixed frame; 8. Positioning structure; 81. Round shell; 82. Motor; 83. Gear 2; 84. Sun gear; 85. Planetary gear; 86. Rack 2; 87. Arc block; 9. Anti-detachment structure; 91. Embedded block; 92. Groove; 93. Gear 3; 94. Lead screw; 95. Transmission block; 96. Extension block; 97. Roller 1; 98. Rack 4; 99. Roller 2. Detailed Implementation

[0018] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0019] Reference Figure 1-6 As shown, the present invention provides a technical solution: a durability testing device for an electric drive axle of a new energy vehicle, comprising a base 1, a support platform 2 disposed above the base 1, and a testing component 3 disposed above the support platform 2. An adjustment structure 4 is provided on one side of the base 1. The adjustment structure 4 includes a fixed shell 41 disposed on one side of the base 1, a drive assembly disposed inside the fixed shell 41, and a moving block 44 slidably connected in the opposite direction inside the fixed shell 41. A fixed distance structure 5 is provided on one side of the moving block 44, the fixed distance structure 5 including a long shell 51 disposed on one side of the moving block 44, a moving assembly disposed inside the long shell 51, and a receiving block 55 slidably connected in the opposite direction inside the long shell 51. A support platform 6 is provided on one side, a fixed frame 7 is provided on one side of the support platform 6, and a positioning structure 8 is provided on one side of the fixed frame 7. The positioning structure 8 includes a circular shell 81 provided on one side of the fixed frame 7. An adjustment component is rotatably connected inside the circular shell 81. The adjustment component includes an arc block 87 slidably connected to the outside of the circular shell 81. An anti-detachment structure 9 is provided on one side of the arc block 87. The anti-detachment structure 9 includes an embedding block 91 provided on one side of the arc block 87. A transmission block 95 is slidably connected to one side of the embedding block 91. A roller 97 is rotatably connected to one side of the transmission block 95. The roller 97 is obliquely distributed. A rack 98 is slidably connected to one side of the embedding block 91. A roller 99 is rotatably connected to one side of the rack 98.

[0020] Reference Figure 1-6As shown, in this embodiment: the driving component includes a bidirectional motor 42 disposed on one side of the fixed housing 41, with screws 43 at both ends of the bidirectional motor 42, the screws 43 being threadedly connected to the moving block 44, a connecting block 45 disposed on one side of the moving block 44, the connecting block 45 being connected to the long housing 51, and a long plate 46 disposed on one side of the base 1, with a slider 47 slidably connected to the top of the long plate 46, the slider 47 being connected to the long housing 51 to ensure precise docking between the workpiece and the test component 3.

[0021] The moving component includes a servo motor 52 disposed on one side of the long shell 51. The output end of the servo motor 52 is rotatably connected to the long shell 51. A gear 53 is disposed on the output end of the long shell 51. A rack 54 is slidably connected inside the fixed distance structure 5. The rack 54 is connected to the receiving block 55, which is suitable for electric drive bridge workpieces of different specifications, thus improving the versatility of the lifting device.

[0022] The adjustment assembly includes a motor 82 installed inside the circular shell 81. A gear 83 is installed at the output end of the motor 82. A sun gear 84 is rotatably connected inside the circular shell 81 and meshes with the gear 83. Planetary gears 85 are rotatably connected inside the circular shell 81, and four sets of planetary gears 85 are evenly distributed. A rack 86 is slidably connected to the outside of the circular shell 81 and meshes with the planetary gears 85. The rack 86 is connected to the arc block 87, realizing multi-directional synchronous clamping of the workpiece with uniform positioning and no off-center load.

[0023] The surface of the embedded block 91 has a groove 92, and a gear 93 is rotatably connected inside the groove 92. A lead screw 94 is provided on both sides of the gear 93. The transmission block 95 is threadedly connected to the lead screw 94. An extension block 96 is provided on one side of the transmission block 95. The extension block 96 is connected to the roller 97. The gear 93 is meshed with the rack 98. The transmission block 95 rotates in the opposite direction. There are two sets of transmission blocks 95 symmetrically distributed about the gear 93. The two sets of transmission blocks 95 slide in opposite directions to avoid rigid contact that could scratch the surface of the workpiece.

[0024] Working principle: The operator places the workpiece on the support platform 6 through the external feeding component. The two ends of the workpiece are supported by two sets of support platforms 6, and the middle of the workpiece is supported by a rectangular platform. The support platform 6 stably supports the workpiece, ensuring that the workpiece is placed stably, laying the foundation for subsequent test positioning and avoiding workpiece displacement from affecting test accuracy. By activating the servo motor 52 fixedly mounted on the outside of the long shell 51, the servo motor 52 drives the gear 53 at the output end to rotate. The gear 53 meshes with the two sets of racks 54 on the outside. The two sets of racks 54 slide in the opposite direction with the long shell 51. The two sets of racks 54 drive the receiving blocks 55 at one end to move in the opposite direction. The two sets of receiving blocks 55 drive the bearing platform 6 at the top to adjust its position. This makes it suitable for workpieces of different sizes. By linking the servo motor 52, gear 53, and rack 54, the synchronous reverse adjustment of the receiving blocks 55 and the bearing platform 6 can be achieved, adapting to different specifications of electric drive bridge workpieces, improving the versatility of the device, and allowing it to adapt to multiple models of testing without changing the tooling. Then, the bidirectional motor 42 is started to drive the rotation of the screws 43 on both sides. The two sets of screws 43 are rotatably connected to the fixed shell 41. The two sets of screws 43 are threadedly connected to the two sets of moving blocks 44. The two sets of moving blocks 44 are slidably connected to the fixed shell 41 in the opposite direction. The two sets of moving blocks 44 drive the connecting block 45 to move. The two sets of connecting blocks 45 drive the long shell 51 on each side to move, thereby driving the workpiece on the upper end of the support platform 6 to connect with the test component 3 for testing. The long shell 51 drives the sliders 47 on both sides to slide and connect with the long plate 46. The long plate 46 is fixedly connected to the base 1. Relying on the bidirectional motor 42, screws 43 and moving blocks 44, the workpiece is accurately pushed close to the test component 3. With the sliders 47 and long plate 46 guiding, the movement is smooth and without jamming, ensuring that the workpiece and the test component 3 are accurately connected. A fixed frame 7 is provided on the upper end of the bearing platform 6. The fixed frame 7 drives the circular shell 81 on one side to approach the two ends of the workpiece. The motor 82 inside the circular shell 81 is started, which drives the output gear 83 to rotate. The gear 83 meshes with the sun gear 84. The sun gear 84 rotates with the circular shell 81. The sun gear 84 meshes with the four sets of planetary gears 85 on the outside. The four sets of planetary gears 85 mesh with the rack 86. The four sets of racks 86 drive the arc blocks 87 at one end to approach the workpiece. Through the multi-stage transmission of the motor 82, gear 83, sun gear 84, and planetary gears 85, the rack 86 and the arc blocks 87 are driven to feed smoothly, realizing multi-directional synchronous clamping of the workpiece, uniform positioning without off-center load, and ensuring the stability of the workpiece posture during testing. Because the arc block 87 has an anti-detachment structure 9 on the side closest to the workpiece, the roller 2 99 first contacts the outer surface of the workpiece. The roller 2 99 presses and slides against the rack 4 98. The rack 4 98 meshes with the gear 3 93. The gear 3 93 drives the lead screw 94 to rotate. The lead screw 94 is threadedly connected to the transmission block 95. The two sets of lead screws 94 are slidably connected to the grooves 92 on the surface of the embedded block 91. The embedded block 91 is connected to the arc block 87. The transmission block 95 drives the extension block 96 on one side. Near the surface of the workpiece, one half of the extension block 96 is inclined. The inclined surface of the extension block 96 is rotatably connected to roller 97. Thus, the two sets of inclined rollers 97 and roller 99 make rolling contact with the outer surface of the workpiece. Rolling clamping is achieved by rollers 97 and roller 99 to avoid rigid contact that could scratch the surface of the workpiece. At the same time, adaptive clamping is achieved by the linkage of gear 93, lead screw 94 and transmission block 95 to fit the outer wall of the workpiece and prevent the workpiece from slipping or shaking during the test. By activating the test component 3 on the support platform 2, high-speed continuous durability testing of two sets of workpieces can be carried out simultaneously. Relying on the test component 3, high-speed continuous durability testing of two workpieces can be completed at the same time, improving testing efficiency, conforming to the industry's conventional high-speed durability testing conditions, and ensuring accurate and reliable test results.

[0025] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A durability test device for a new energy vehicle electric drive axle, characterized in that, The device includes a base, a support platform mounted on the base, and a testing component mounted on the support platform. One side of the base has an adjustable distance structure, which includes a fixed shell on one side of the base. A driving assembly is housed inside the fixed shell. A moving block is slidably connected to the inside of the fixed shell in the opposite direction. One side of the moving block has a fixed distance structure, which includes a long shell on one side of the moving block. A moving assembly is housed inside the long shell. A receiving block is slidably connected to the inside of the long shell in the opposite direction. One side of the receiving block has a bearing platform. A fixed frame is provided, and a positioning structure is provided on one side of the fixed frame. The positioning structure includes a circular shell provided on one side of the fixed frame. An adjusting component is rotatably connected inside the circular shell. The adjusting component includes an arc block slidably connected to the outside of the circular shell. An anti-detachment structure is provided on one side of the arc block. The anti-detachment structure includes an embedded block provided on one side of the arc block. A transmission block is slidably connected to one side of the embedded block. A roller is rotatably connected to one side of the transmission block. The roller is obliquely distributed. A rack is slidably connected to one side of the embedded block. A roller is rotatably connected to one side of the rack. 2.The device for testing durability of electric drive axle of new energy vehicle according to claim 1, characterized in that: The drive assembly includes a bidirectional motor disposed on one side of the fixed housing, and screws are provided at both ends of the bidirectional motor, the screws being threadedly connected to the moving block.

3. The durability testing device for electric drive axles of new energy vehicles according to claim 2, characterized in that: A connecting block is provided on one side of the movable block, and the connecting block is connected to the long shell. A long plate is provided on one side of the base, and a slider is slidably connected to the top of the long plate, and the slider is connected to the long shell.

4. The durability testing device for electric drive axles of new energy vehicles according to claim 1, characterized in that: The moving component includes a servo motor disposed on one side of the long shell, and the output end of the servo motor is rotatably connected to the long shell.

5. The durability testing device for electric drive axles of new energy vehicles according to claim 4, characterized in that: The output end of the servo motor is provided with a gear, and the fixed-distance structure is internally slidably connected with a rack, which is connected to the receiving block.

6. The durability testing device for electric drive axles of new energy vehicles according to claim 1, characterized in that: The adjustment component includes a motor disposed inside the cylindrical shell, a second gear being disposed at the output end of the motor, and a sun gear being rotatably connected inside the cylindrical shell, the sun gear being meshed with the second gear.

7. The durability testing device for electric drive axles of new energy vehicles according to claim 6, characterized in that: The inner part of the circular shell is rotatably connected to a planetary gear, and four sets of planetary gears are evenly distributed. The outer side of the circular shell is slidably connected to a rack, which meshes with the planetary gears and is connected to an arc block.

8. The durability testing device for electric drive axles of new energy vehicles according to claim 1, characterized in that: The surface of the embedded block is provided with a groove, and a gear three is rotatably connected inside the groove. Lead screws are provided on both sides of the gear three.

9. The durability testing device for electric drive axles of new energy vehicles according to claim 8, characterized in that: The transmission block is threadedly connected to the lead screw, and an extension block is provided on one side of the transmission block, which is connected to a roller.

10. The durability testing device for electric drive axles of new energy vehicles according to claim 9, characterized in that: The gear three meshes with the rack four, the transmission block rotates in the opposite direction, and there are two sets of transmission blocks symmetrically distributed about the gear three, with the two sets of transmission blocks sliding in opposite directions.

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