A new energy automobile electric drive system performance test bench

Abstract

The application discloses a new energy automobile electric drive system performance test bench, and relates to the technical field of test equipment, which comprises an inertia simulation disc and an electric drive simulation structure, wherein the inertia simulation disc comprises an inertia disc shaft, circular mounting racks are fixedly installed at the outer sides of both ends of the inertia disc shaft, plane needle bearings are fixedly installed at opposite sides of the two circular mounting racks, support structures are arranged at opposite sides of the two plane needle bearings, the support structures comprise support bases and upper clamping boxes, and maintenance assemblies are arranged in the upper clamping boxes; the separable design of the upper clamping boxes and the support bases increases the positioning speed of the inertia simulation disc, the inertia simulation disc is quickly positioned and installed with the two support structures and the electric drive simulation structure, the inertia simulation disc can be pre-assembled by the staff, there is sufficient space for assembling the inertia simulation disc, the symmetrical arrangement of the flywheel on the inertia disc shaft is ensured to be completed, and the design rigor of the inertia simulation disc structure is improved.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically a performance testing bench for electric drive systems of new energy vehicles. Background Technology

[0002] A test bench is essentially a testing platform, but different test benches require different technical support systems. These support systems are the most complex and expensive part of a test bench. Current test benches primarily employ a modular design, mainly including an energy supply module, drive module, inertia simulation module, load simulation module, data acquisition module, and main control module. Test bench simulation tests narrow the gap between pure software simulation and actual conditions, and significantly shorten the cycle of real-vehicle testing; test benches can perform tests on vehicles with different structural types.

[0003] However, in the application of existing performance test benches, flywheels of different sizes are replaced according to the different rotational inertia of the simulated vehicle. However, the installation and removal of flywheels must be carried out on the performance test bench, which limits the operating space and the accuracy of flywheel installation. Furthermore, the inertia disc shaft for installing flywheels cannot be adaptively adjusted, affecting the accuracy of test results.

[0004] For example, patent application publication number CN106769077A discloses a performance test bench for electric drive systems of new energy vehicles, including a magnetic powder brake, a torque sensor, gears, bearings, a long shaft, a flywheel, a left half shaft, and a right half shaft; the gears, along with the long shaft and the left and right half shafts, form a differential locking system, making the test bench suitable for testing electric drive systems of mechanical automatic transmissions that include differential action.

[0005] Taking the aforementioned performance test bench as an example, during the application of the performance test bench, when the inertia disk shaft is fixed on the performance test bench, the two flywheels on the inertia disk shaft need to be disassembled and replaced. The operating space and operating method are limited, and the inertia disk shaft cannot be adapted to the design, which affects the test results. Summary of the Invention

[0006] The purpose of this invention is to provide a performance test bench for electric drive systems of new energy vehicles, in order to solve the problems in the existing performance test benches where the inertia disc shaft is fixed, the two flywheels on the inertia disc shaft are disassembled and replaced, the operating space and operating methods are limited, and the inertia disc shaft cannot be adapted to the design, which affects the test results.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a performance test bench for an electric drive system of a new energy vehicle, comprising an inertia simulation disk and an electric drive simulation structure. The inertia simulation disk includes an inertia disk shaft, with circular mounting brackets fixedly installed at both ends of the outer side of the inertia disk shaft. Planar needle roller bearings are fixedly installed on opposite sides of the two circular mounting brackets. Support structures are provided on opposite sides of the two planar needle roller bearings. The support structure includes a support base and an upper clamping box. A position control component is provided between the support base and the upper clamping box. Semicircular clamping brackets are fixedly embedded at the bottom of the upper clamping box and at the top of the support base. Multiple rolling ball mounting brackets are fixedly installed inside the semicircular clamping brackets, and rolling balls roll inside the rolling ball mounting brackets. The multiple rolling balls are arranged in a ring outside the inertia disk shaft and abut against the inertia disk shaft. A maintenance component is provided inside the upper clamping box.

[0008] Preferably, the electric drive simulation structure includes a magnetic powder brake, a torque sensor, a drive motor, and a mechanical automatic transmission. The drive motor is fixedly connected to an adjacent support base by a support seat. The output end of the drive motor is fixedly connected to the input end of the mechanical automatic transmission. Both output ends of the mechanical automatic transmission are fixedly connected to a drive shaft. The drive shaft rotatably passes through the adjacent support base. The magnetic powder brake and the torque sensor are fixedly connected by a mounting seat.

[0009] Preferably, a transmission gear is fixedly installed on the outer side of each of the two transmission shafts, the transmission shaft away from the drive motor is fixedly connected to the input end of the torque sensor, and the output end of the torque sensor is inserted into the magnetic powder brake.

[0010] Preferably, each of the two planar needle roller bearings is provided with a second transmission gear on one side opposite to the other. The second transmission gear is fixedly installed on the outside of the inertia disc shaft. The second transmission gear meshes with the adjacent first transmission gear. Each of the two circular mounting brackets is provided with a flywheel on one side away from each other. The flywheel is fixedly installed on the outside of the inertia disc shaft.

[0011] Preferably, the support base has multiple foot holes on its outer side, a mounting groove three on one side of the support base, two limiting slots one on one side of the mounting groove three, the limiting slots one being opened on the support base, positioning plates are fixedly connected to both sides of the bottom of the upper clamping box, a limiting slot two is opened on one side of the positioning plate, and two square grooves are opened on the top of the support base.

[0012] Preferably, the position control component includes a pneumatic cylinder, a telescopic rod is provided on one side of the pneumatic cylinder, and a support frame four is fixedly installed on the outer side of the telescopic rod. Both the pneumatic cylinder and the support frame four are disposed inside the mounting groove three. The outer walls of the pneumatic cylinder and the support frame four are fixedly connected to the support base. The support frame three is disposed inside the mounting groove three. The piston ends of the pneumatic cylinder and the telescopic rod are fixedly connected to the support frame three. Two limiting rods are fixedly installed on the outer side of the support frame three. The limiting rods correspond one-to-one with the limiting slots.

[0013] Preferably, a movable arm is fixedly connected to one end of the upper clamping box, and an installation groove is provided on the outer side of the movable arm. A pull rope is threaded through the inside of the limiting rod, and the two ends of the pull rope are fixedly connected to the movable arm and the support frame three, respectively. The pull rope is threaded on the support base, and pulley one and pulley two are provided on the outer side of the pull rope. Both pulley one and pulley two are fixedly connected to the support base.

[0014] Preferably, a support shaft is fixedly inserted inside the movable arm, and a support frame 1 is rotatably connected to both ends of the support shaft. The support frame 1 is fixedly connected to the support base. Each of the two support frames 1 has an installation groove 1 on one opposite side. A torsion spring is installed inside the installation groove 1. One end of the torsion spring is fixedly connected to the support shaft, and the other end of the torsion spring is fixedly connected to a support frame 2. A torsion spring box and two torsion spring mounting shafts are rotatably installed on the outside of the support frame 2. The torsion spring mounting shafts are fixedly installed between the torsion spring box and the support base. The torsion spring passes through the torsion spring box, and the torsion spring portion is located inside the torsion spring box and surrounds the outside of the support frame 2.

[0015] Preferably, the maintenance assembly includes two liquid storage tanks, both of which are disposed inside the upper clamping box. A pad is fixedly connected between the bottom of the liquid storage tank and the bottom of the inner cavity of the upper clamping box. Vertical telescopic tubes are fixedly connected to both sides of the bottom of the liquid storage tank. A pad is fixedly connected to the bottom end of the vertical telescopic tube and passes through the bottom of the upper clamping box. A one-way valve and a second solenoid valve are fixedly installed on the top of the liquid storage tank. A guide bend is fixedly connected to the second solenoid valve and one end of the guide bend extends to the outside of the upper clamping box. A sealing frame one and a sealing frame two are fixedly connected between the outside of one liquid storage tank and the inner wall of the upper clamping box. A sealing frame three and a sealing frame four are fixedly connected between the other liquid storage tank and the inner wall of the upper clamping box.

[0016] Preferably, the outer side of the semi-circular clamping frame is provided with an arc-shaped guide groove and multiple flow channels, each flow channel corresponding to a rolling ball mounting frame, and the flow channels are connected to the interior of the rolling ball mounting frame. One end of the guide bend extends into the interior of the adjacent arc-shaped guide groove, and a solenoid valve is fixedly connected to the top of the upper clamping box.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. When using this application, two support structures clamp and limit the inertia simulation disk. The separable design of the upper clamping box and the support base increases the speed of inertia simulation disk installation and positioning. The clamping components composed of two semi-circular clamping frames, multiple rolling ball mounting frames, and multiple rolling balls can not only meet the drag reduction clamping requirements of the inertia simulation disk, but also separate and combine to limit the inertia disk shaft, enabling the inertia simulation disk to quickly complete the positioning and installation with the two support structures and the electric drive simulation structure. The staff can pre-assemble the inertia simulation disk, and there is sufficient space for operation during the assembly of the inertia simulation disk to ensure that the flywheel is symmetrically set on the inertia disk shaft. This improves the rigor of the inertia simulation disk structural design, ensures the rigor and accuracy of the inertia simulation disk simulation, and improves the accuracy of the performance test bench in simulating the real rotational inertia of different new energy vehicles.

[0018] 2. When this application is used, the control solenoid valve two is opened. Under high pressure inside the liquid storage tank, some of the lubricating oil inside the liquid storage tank enters the arc-shaped guide groove through the solenoid valve two and the guide bend. At this time, the semi-circular clamping frame fixedly embedded in the upper clamping box is aligned with the semi-circular clamping frame fixedly embedded in the support base. The two arc-shaped guide grooves guide the lubricating oil, and some of the lubricating oil enters the rolling ball mounting frame through the guide groove. During the rolling process driven by the rotating inertia disk shaft, the lubricating oil sticks to the outside of the rolling ball, which slows down the wear speed of the rolling ball, improves the rotational stability of the inertia simulation disk, and reduces the test result error caused by the clamping limit error during the application of the support structure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the inertia simulation disk of the present invention; Figure 3 This is a schematic diagram of the circular mounting bracket of the present invention; Figure 4 This is a schematic diagram of the supporting structure of the present invention; Figure 5 This is a schematic diagram of the structure of the movable arm of the present invention; Figure 6 This is a schematic diagram of the structure of the second support frame of the present invention; Figure 7 This is a schematic diagram of the structure of the support base of the present invention; Figure 8 This is a schematic diagram of the separation structure of the support base and the support frame three of the present invention; Figure 9 This is a schematic diagram of the separation structure of the clamping box and the support base in this invention; Figure 10 This is a cross-sectional view of the clamping box of the present invention; Figure 11 This is a schematic diagram of the liquid storage tank of the present invention; Figure 12 This is a schematic diagram of the separation structure of the clamping box and the semi-circular clamping frame in this invention; Figure 13 This is a schematic diagram of the semi-circular clamping frame of the present invention.

[0020] The diagram labels are as follows: 1. Support structure; 11. Support base; 12. Anchor hole; 13. Support frame one; 14. Support shaft; 15. Movable arm; 16. Upper clamping box; 17. Mounting slot one; 18. Torsion spring; 19. Torsion spring box; 110. Torsion spring mounting shaft; 111. Support frame two; 112. Mounting slot two; 113. Pull rope; 114. Pulley one; 115. Pulley two; 116. Support frame three; 117. Pneumatic cylinder; 118. Support frame four; 119. Telescopic rod; 120. Mounting slot three; 121. Limiting slot one; 122. Limiting rod; 123. Semi-circular clamping frame; 124. Rolling ball mounting frame; 125. Rolling ball; 126. Square slot; 127. Positioning plate; 12 8. Limiting slot two; 129. Solenoid valve one; 130. Liquid storage tank; 131. Pad block; 132. One-way valve; 133. Vertical telescopic pipe; 134. Pad plate; 135. Guide bend; 136. Arc-shaped guide groove; 137. Drainage groove; 138. Sealing frame one; 139. Sealing frame two; 140. Sealing frame three; 141. Sealing frame four; 142. Solenoid valve two; 2. Inertia simulation disk; 21. Inertia disk shaft; 22. Transmission gear two; 23. Flywheel; 24. Circular mounting bracket; 25. Flat needle roller bearing; 3. Magnetic powder brake; 4. Torque sensor; 5. Support base; 6. Drive motor; 7. Mechanical automatic transmission; 8. Drive shaft; 9. Transmission gear one; 10. Mounting base. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example: Figures 1-13As shown, the present invention provides a performance test bench for an electric drive system of a new energy vehicle, including an inertia simulation disk 2 and an electric drive simulation structure. The inertia simulation disk 2 includes an inertia disk shaft 21. Circular mounting brackets 24 are fixedly installed at both ends of the outer side of the inertia disk shaft 21. Planar needle roller bearings 25 are fixedly installed on opposite sides of the two circular mounting brackets 24. Support structures 1 are provided on opposite sides of the two planar needle roller bearings 25. Support structures 1 include a support base 11 and an upper clamping box 16. A position control component is provided between the support base 11 and the upper clamping box 16. Semicircular clamping brackets 123 are fixedly embedded at the bottom of the upper clamping box 16 and the top of the support base 11. Multiple rolling ball mounting brackets 124 are fixedly installed inside the semicircular clamping brackets 123. Rolling balls 125 roll inside the rolling ball mounting brackets 124. The multiple rolling balls 125 are distributed in a ring on the outer side of the inertia disk shaft 21 and abut against the inertia disk shaft 21. Maintenance components are provided inside the upper clamping box 16.

[0023] Specifically, such as Figure 1 , Figure 2 and Figure 3 The electric drive simulation structure consists of a magnetic powder brake 3, a torque sensor 4, a drive motor 6, and a mechanical automatic transmission 7. A support base 5 is fixedly connected between the drive motor 6 and the adjacent support base 11. The drive motor 6 simulates the working mode of the power output device in an automotive electric drive system. The output end of the drive motor 6 is fixedly connected to the input end of the mechanical automatic transmission 7. The mechanical automatic transmission 7 transfers the rotational force output by the drive motor 6. A differential is integrated at the output end of the mechanical automatic transmission 7, providing differential function. Both output ends of the mechanical automatic transmission 7 are fixedly connected to drive shafts 8, which rotatably pass through the adjacent support base 11 and are driven to rotate by the mechanical automatic transmission 7. Transmission gears 9 are fixedly installed on the outer sides of both drive shafts 8, and these gears rotate. The drive shaft 8 furthest from the drive motor 6 is fixedly connected to the input end of the torque sensor 4. The torque sensor 4 measures the torque change of the drive motor 6. The output end of the torque sensor 4 is inserted into the magnetic powder brake 3. The magnetic powder brake 3 can adjust the braking torque by controlling the magnitude of the power supply current, thus adjusting the load torque.

[0024] Two flat needle roller bearings 25 are each provided with a transmission gear 22 on opposite sides. The transmission gear 22 is fixedly installed on the outside of the inertia disk shaft 21. The transmission gear 22 meshes with the adjacent transmission gear 9. The rotation of the two transmission gears 9 drives the two transmission gears 22 to rotate, the inertia disk shaft 21 to rotate, and the inertia simulation disk 2 to rotate. Two circular mounting brackets 24 are each provided with a flywheel 23 on opposite sides. The flywheel 23 is fixedly installed on the outside of the inertia disk shaft 21.

[0025] During testing, the drive motor 6 rotates actively as the power source, and the mechanical automatic transmission 7 drives the two transmission shafts 8 to rotate. The inertia simulation disk 2, torque sensor 4, and magnetic powder brake 3 rotate at the same speed. The magnetic powder brake 3 can adjust the braking torque by controlling the magnitude of the power supply current, that is, adjust the load torque to simulate the load of a real pure electric vehicle during driving and balance the torque transmitted from the drive motor 6. The torque sensor 4 can measure the torque change of the drive motor 6. At the same time, the inertia simulation disk 2, supported by two support structures 1, can be quickly changed in size and model to simulate the real rotational inertia of different new energy vehicles.

[0026] Specifically, such as Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 The support base 11 has multiple foot holes 12 on its outer side, which are used to fix the support base 11 to the ground. The support base 11 has a mounting groove 120 on one side, and two limiting slots 121 on one side of the mounting groove 120 are provided on the support base 11. The upper clamping box 16 has positioning plates 127 fixedly connected to both sides of its bottom. The positioning plate 127 has a limiting slot 128 on one side. The support base 11 has two square slots 126 on its top. The positioning plate 127 corresponds to the square slot 126. When the positioning plate 127 is inserted into the corresponding square slot 126, the limiting slot 128 is aligned with the preset limiting slot 121.

[0027] In the position control assembly, a telescopic rod 119 is provided on one side of the pneumatic cylinder 117. A support frame 118 is fixedly installed on the outside of the telescopic rod 119. Both the pneumatic cylinder 117 and the support frame 118 are located inside the mounting groove 120. The outer walls of the pneumatic cylinder 117 and the support frame 118 are fixedly connected to the support base 11. The relative positions between the outer walls of the pneumatic cylinder 117 and the telescopic rod 119 and the support base 11 remain unchanged. A support frame 116 is provided inside the mounting groove 120. The pneumatic cylinder 117 and the telescopic rod 119... The piston ends of 19 are all fixedly connected to the support frame 3 116. With the cooperation of the pneumatic cylinder 117 and the telescopic rod 119, the support frame 3 116 moves horizontally left and right. Two limit rods 122 are fixedly installed on the outside of the support frame 3 116. The limit rods 122 correspond one-to-one with the limit slots 121. The pneumatic cylinder 117 is controlled to work, so that the support frame 3 116 moves. After the limit rods 122 pass through the interior of the limit slots 121 and 128 which are in the aligned state, the position of the upper clamping box 16 is fixed.

[0028] One end of the upper clamping box 16 is fixedly connected to a movable arm 15. The support shaft 14, which is fixedly inserted inside the movable arm 15, is rotatably connected to both ends of a support frame 13. The support frame 13 is fixedly connected to the support base 11, so the movable arm 15 can rotate and the upper clamping box 16 can rotate. The size of the square groove 126 is much larger than that of the positioning plate 127. The positioning plate 127 rotates synchronously with the upper clamping box 16 without affecting the movement of the upper clamping box 16.

[0029] Two support frames 13 each have a mounting groove 17 on one side. One end of a torsion spring 18 inside the mounting groove 17 is fixedly connected to the support shaft 14, and the other end of the torsion spring 18 is fixedly connected to a support frame 111. A torsion spring box 19 and two torsion spring mounting shafts 110 are rotatably mounted on the outside of the support frame 111. The torsion spring mounting shafts 110 are fixedly mounted between the torsion spring box 19 and the support base 11. The torsion spring box 19 cannot move and serves to store the torsion spring 18. The torsion spring 18 passes through the torsion spring box 19. Part of the torsion spring 18 is located inside the torsion spring box 19 and surrounds the outside of the support frame 111. The torsion spring 18 applies tension to the support shaft 14.

[0030] A pull rope 113 is threaded through the mounting groove 112 on the outer side of the movable arm 15. The two ends of the pull rope 113 are fixedly connected to the movable arm 15 and the support frame 116 respectively. The pull rope 113 is threaded through the support base 11. Pulley 114 and pulley 115 are provided on the outer side of the pull rope 113. Both pulley 114 and pulley 115 are fixedly connected to the support base 11. The movable arm 15 is located inside the mounting groove 120. Pulley 114 and pulley 115 change the direction of the pull rope 113, so that one end of the pull rope 113 moves synchronously with the support frame 116.

[0031] Specifically, such as Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 In the maintenance assembly, all liquid storage tanks 130 are located inside the upper clamping box 16. A pad 131 is fixedly connected between the bottom of the liquid storage tank 130 and the bottom of the inner cavity of the upper clamping box 16. The position of the liquid storage tank 130 is fixed. One of the liquid storage tanks 130 is fixedly connected to the outer side of the upper clamping box 16 with a sealing frame 138 and a sealing frame 139. The other liquid storage tank 130 is fixedly connected to the inner wall of the upper clamping box 16 with a sealing frame 340 and a sealing frame 414. 1. Under the action of two liquid storage tanks 130, sealing frame one 138, sealing frame two 139, sealing frame three 140 and sealing frame four 141, the interior of the upper clamping box 16 is divided into a liquid storage chamber and a receiving chamber. A one-way valve 132 fixedly installed on the outside of the liquid storage tank 130 is located inside the liquid storage chamber. A solenoid valve one 129 fixedly connected to the top of the upper clamping box 16 is connected to the inside of the liquid storage chamber. By controlling the solenoid valve one 129 to open, lubricating oil can be supplied to the inside of the liquid storage chamber.

[0032] Vertical telescopic tubes 133 are fixedly connected to both sides of the bottom of the liquid storage tank 130. The vertical telescopic tubes 133 are set inside the storage cavity. The pad 134 fixedly connected to the bottom end of the vertical telescopic tube 133 passes through the bottom of the upper clamping box 16. Under the action of the pad 134, the vertical telescopic tube 133 extends to the outside of the upper clamping box 16. A one-way valve 132 and a second solenoid valve 142 are fixedly installed on the top of the liquid storage tank 130. The second solenoid valve 142 is fixedly connected to a flow guide bend 135. One end of the flow guide bend 135 extends to the outside of the upper clamping box 16.

[0033] The outer side of the semi-circular clamping frame 123 is provided with an arc-shaped flow guide groove 136 and multiple flow diversion grooves 137. The flow diversion grooves 137 are connected to the interior of the arc-shaped flow guide groove 136. The flow diversion grooves 137 correspond one-to-one with the rolling ball mounting frame 124. The flow diversion grooves 137 are connected to the interior of the rolling ball mounting frame 124, and one end of the flow guide bend 135 extends into the interior of the adjacent arc-shaped flow guide groove 136.

[0034] In summary, this application comprises a performance test bench consisting of an inertia simulation disk 2, an electric drive simulation structure, two support structures 1, a magnetic powder brake 3, a torque sensor 4, a support base 5, a drive motor 6, a mechanical automatic transmission 7, a transmission shaft 8, a transmission gear 9, and a mounting base 10. The working principle of the performance test bench is as follows: First, the two support structures 1 are controlled to work. The pneumatic cylinder 117 in the support structure 1 works to push the support frame 3 116 to move away from the mechanical automatic transmission 7. In the initial stage of the movement of the support frame 3 116, after the limit rod 122 leaves the inside of the limit slot 1 121, the pull rope 113 is pulled and tightened. As the support frame 3 116 continues to move, the support frame 3 116 pulls the movable arm 15 to rotate through the pull rope 113. The torsion spring 18 extends, causing the upper clamping box 16 fixedly connected to the movable arm 15 and the semi-circular clamping frame 123 fixedly embedded at the bottom of the upper clamping box 16 to rotate. The upper clamping box 16 moves to the top side of the support base 11, and the support structure 1 enters the open state.

[0035] Subsequently, the inertia disk shaft 21 is installed inside the semi-circular clamping frame 123 of the two support bases 11. At this time, the two flat needle roller bearings 25 installed on the outside of the inertia disk shaft 21 respectively abut against the two support bases 11 on opposite sides. The inertia disk shaft 21 can rotate but cannot move left or right. The inertia simulation disk 2 can rotate but cannot move left or right. During this process, the rotation of the second transmission gear 22 is adjusted so that the second transmission gear 22 meshes with the first transmission gear 9. During the positioning process of the inertia simulation disk 2 and the two support structures 1, the meshing of the inertia simulation disk 2 with the electric drive simulation structure is completed.

[0036] Subsequently, the control cylinder 117 operates, driving the support frame 116 to move toward the mechanical automatic transmission 7. After the pull rope 113 is released, the two torsion springs 18 rebound and contract, causing the support shaft 14 to rotate and reset. The movable arm 15 and the upper clamping box 16 are reset. The positioning insert 127 fixedly connected to the upper clamping box 16 is inserted into the square slot 126. After the pull rope 113 is released, the semi-circular clamping frame 123 fixedly embedded in the upper clamping box 16 is aligned with the semi-circular clamping frame 123 fixedly embedded at the top of the support base 11. The support frame 116 continues to move, passing the limiting insert 122 through the limiting slot 121. After the support frame 116 returns to the mounting slot 120, the closing of the support structure 1 is completed, and the support structure 1 enters the closed state.

[0037] Two support structures 1 clamp and limit the inertia simulation disk 2. The separable design of the upper clamping box 16 and the support base 11 increases the speed of installation and positioning of the inertia simulation disk 2. The clamping components composed of two semi-circular clamping frames 123, multiple rolling ball mounting frames 124 and multiple rolling balls 125 can not only meet the drag reduction clamping requirements of the inertia simulation disk 2, but also separate and combine to limit the inertia disk shaft 21.

[0038] By installing two circular mounting brackets 24 on the outside of the inertia disk shaft 21, and fixing flat needle roller bearings 25 on the outside of the circular mounting brackets 24, the two flat needle roller bearings 25 abut against the two support bases 11, completing the upper limit braking of the inertia disk shaft 21 in the left and right directions, so that the inertia simulation disk 2 can quickly complete the positioning and installation with the two support structures 1 and the electric drive simulation structure. The staff can pre-assemble the inertia simulation disk 2, and there is enough space for the assembly of the inertia simulation disk 2 to ensure that the flywheel 23 is symmetrically set on the inertia disk shaft 21, which improves the rigor of the structural design of the inertia simulation disk 2, ensures the rigor and accuracy of the simulation of the inertia simulation disk 2, and improves the accuracy of the performance test bench in simulating the real rotational inertia of different new energy vehicles.

[0039] Additionally, during the process of the upper clamping box 16 flipping away from the support base 11, the vertical telescopic tube 133 extends, and the lubricating oil inside the upper clamping box 16 enters the vertical telescopic tube 133 and the reservoir 130 through the one-way valve 132. During the process of the upper clamping box 16 flipping back to the top of the support base 11, the pad 134 fixedly connected to the bottom end of the vertical telescopic tube 133 first contacts the support base 11, and the vertical telescopic tube 133 retracts. However, the one-way valve 132 is open in one direction, and the lubricating oil inside the reservoir 130 cannot be discharged through the one-way valve 132. The second solenoid valve 142 is in the closed state, and the hydraulic pressure inside the reservoir 130 increases. When the support structure 1 enters the closed state, the control solenoid valve 142 is opened, and the reservoir... Under high pressure inside the tank 130, some of the lubricating oil inside the storage tank 130 enters the arc-shaped guide groove 136 through the solenoid valve 142 and the guide bend 135. At this time, the semi-circular clamping frame 123 fixedly embedded in the upper clamping box 16 is aligned with the semi-circular clamping frame 123 fixedly embedded in the support base 11. The two arc-shaped guide grooves 136 guide the lubricating oil, and some of the lubricating oil enters the rolling ball mounting frame 124 through the guide groove 137. During the rolling process of the rolling ball 125 being driven to roll by the rotating inertia disk shaft 21, the lubricating oil adheres to the outside of the rolling ball 125, which slows down the wear rate of the rolling ball 125, improves the rotational stability of the inertia simulation disk 2, and reduces the test result error caused by the clamping limit error during the application of the support structure 1.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A performance test bench for an electric drive system of a new energy vehicle, comprising an inertia simulation disk (2) and an electric drive simulation structure, characterized in that: The inertia simulation disk (2) includes an inertia disk shaft (21). Circular mounting brackets (24) are fixedly installed at both ends of the outer side of the inertia disk shaft (21). Planar needle roller bearings (25) are fixedly installed on opposite sides of the two circular mounting brackets (24). Support structures (1) are provided on opposite sides of the two planar needle roller bearings (25). The support structure (1) includes a support base (11) and an upper clamping box (16). A space is provided between the support base (11) and the upper clamping box (16). The upper clamping box (16) has a position control component. The bottom of the upper clamping box (16) and the top of the support base (11) are both fixedly embedded with a semi-circular clamping frame (123). Multiple rolling ball mounting frames (124) are fixedly installed inside the semi-circular clamping frame (123). Rolling balls (125) roll inside the rolling ball mounting frames (124). The multiple rolling balls (125) are distributed in a ring on the outside of the inertia disk shaft (21) and abut against the inertia disk shaft (21). The upper clamping box (16) is equipped with a maintenance component.

2. The performance test bench for a new energy vehicle electric drive system according to claim 1, characterized in that: The electric drive simulation structure includes a magnetic powder brake (3), a torque sensor (4), a drive motor (6), and a mechanical automatic transmission (7). The drive motor (6) is fixedly connected to the adjacent support base (11) by a support seat (5). The output end of the drive motor (6) is fixedly connected to the input end of the mechanical automatic transmission (7). Both output ends of the mechanical automatic transmission (7) are fixedly connected to a drive shaft (8). The drive shaft (8) rotates through the adjacent support base (11). The magnetic powder brake (3) and the torque sensor (4) are fixedly connected by a mounting seat (10).

3. The performance test bench for a new energy vehicle electric drive system according to claim 2, characterized in that: Both of the two drive shafts (8) are fixedly mounted with drive gears (9) on their outer sides. The drive shaft (8) away from the drive motor (6) is fixedly connected to the input end of the torque sensor (4). The output end of the torque sensor (4) is inserted into the magnetic powder brake (3).

4. The performance test bench for a new energy vehicle electric drive system according to claim 3, characterized in that: Two of the two planar needle roller bearings (25) are provided with a second transmission gear (22) on opposite sides. The second transmission gear (22) is fixedly installed on the outside of the inertia disc shaft (21). The second transmission gear (22) meshes with the adjacent first transmission gear (9). Two of the two circular mounting brackets (24) are provided with a flywheel (23) on opposite sides. The flywheel (23) is fixedly installed on the outside of the inertia disc shaft (21).

5. The performance test bench for a new energy vehicle electric drive system according to claim 1, characterized in that: The support base (11) has multiple foot holes (12) on its outer side. The support base (11) has a mounting groove three (120) on one side. The mounting groove three (120) has two limiting slots one (121) on one side. The limiting slots one (121) are opened on the support base (11). The upper clamping box (16) has positioning plates (127) fixedly connected to both sides of its bottom. The positioning plates (127) have a limiting slot two (128) on one side. The support base (11) has two square slots (126) on its top.

6. The performance test bench for a new energy vehicle electric drive system according to claim 5, characterized in that: The position control component includes a pneumatic cylinder (117), a telescopic rod (119) is provided on one side of the pneumatic cylinder (117), and a support frame four (118) is fixedly installed on the outside of the telescopic rod (119). The pneumatic cylinder (117) and the support frame four (118) are both located inside the mounting groove three (120). The outer wall of the pneumatic cylinder (117) and the outer wall of the support frame four (118) are both fixedly connected to the support base (11). A support frame three (116) is provided inside the mounting groove three (120). The piston ends of the pneumatic cylinder (117) and the telescopic rod (119) are both fixedly connected to the support frame three (116). Two limiting rods (122) are fixedly installed on the outside of the support frame three (116). The limiting rods (122) correspond one-to-one with the limiting slot one (121).

7. The performance test bench for a new energy vehicle electric drive system according to claim 6, characterized in that: One end of the upper clamping box (16) is fixedly connected to a movable arm (15). The movable arm (15) has an installation groove (112) on its outer side. A pull rope (113) is threaded through the limiting rod (122). The two ends of the pull rope (113) are fixedly connected to the movable arm (15) and the support frame (116) respectively. The pull rope (113) is threaded on the support base (11). A pulley (114) and a pulley (115) are provided on the outer side of the pull rope (113). Both pulley (114) and pulley (115) are fixedly connected to the support base (11).

8. The performance test bench for a new energy vehicle electric drive system according to claim 7, characterized in that: The movable arm (15) is fixedly provided with a support shaft (14). Both ends of the support shaft (14) are rotatably connected to a support frame (13). The support frame (13) is fixedly connected to the support base (11). The two support frames (13) are provided with an installation groove (17) on opposite sides. A torsion spring (18) is provided inside the installation groove (17). One end of the torsion spring (18) is fixedly connected to the support shaft (14). The other end of the torsion spring (18) is fixedly connected to a support frame (111). A torsion spring box (19) and two torsion spring mounting shafts (110) are rotatably installed on the outside of the support frame (111). The torsion spring mounting shafts (110) are fixedly installed between the torsion spring box (19) and the support base (11). The torsion spring (18) passes through the torsion spring box (19). The torsion spring (18) is partially located inside the torsion spring box (19) and surrounds the outside of the support frame (111).

9. The performance test bench for a new energy vehicle electric drive system according to claim 1, characterized in that: The maintenance assembly includes two liquid storage tanks (130), both of which are located inside the upper clamping box (16). A pad (131) is fixedly connected between the bottom of each liquid storage tank (130) and the bottom of the inner cavity of the upper clamping box (16). Vertical telescopic tubes (133) are fixedly connected to both sides of the bottom of each liquid storage tank (130). A pad (134) is fixedly connected to the bottom end of each vertical telescopic tube (133). The pad (134) passes through the bottom of the upper clamping box (16). The top of each liquid storage tank (130) is fixedly connected to... A one-way valve (132) and a solenoid valve (142) are fixedly installed. The solenoid valve (142) is fixedly connected to a flow guide bend (135). One end of the flow guide bend (135) extends to the outside of the upper clamping box (16). A sealing frame (138) and a sealing frame (139) are fixedly connected between the outside of one of the liquid storage tanks (130) and the inner wall of the upper clamping box (16). A sealing frame (3) and a sealing frame (4) (141) are fixedly connected between the other liquid storage tank (130) and the inner wall of the upper clamping box (16).

10. A performance test bench for a new energy vehicle electric drive system according to claim 9, characterized in that: The semi-circular clamping frame (123) has an arc-shaped guide groove (136) and multiple flow channels (137) on its outer side. The flow channels (137) correspond one-to-one with the rolling ball mounting frame (124). The flow channels (137) are connected to the inside of the rolling ball mounting frame (124). One end of the guide bend (135) extends into the interior of the adjacent arc-shaped guide groove (136). The top of the upper clamping box (16) is fixedly connected to a solenoid valve (129).

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