A new energy vehicle drive shaft torque testing device and method

Abstract

The invention relates to the field of automobile testing technology, and specifically discloses a new energy automobile drive shaft torque testing device, which comprises: a base, a conveying bearing platform, a support plate one, and a support plate two. The conveying bearing platform, the support plate one, and the support plate two are arranged on the base, the support plate one and the support plate two are located on both sides of the conveying bearing platform, and the plate surfaces of the support plate one and the support plate two are respectively provided with a testing mechanism one and a testing mechanism two, the testing mechanism one and the testing mechanism two are arranged relatively, and the structures and installation methods of the testing mechanism one and the testing mechanism two are the same. The automobile drive shaft is placed on the conveying bearing platform, and a shifting component drives a push plate one to move toward an end close to the automobile drive shaft, and then a spline sleeve matches an external spline at the end of the automobile drive shaft, and the baffle two contacts the baffle one, and a pressure plate moves toward the circumference close to the drive shaft, and the pressure plate presses a strain gauge pasted on the circumference of the drive shaft, so that the strain gauge is closely fitted to the circumferential surface of the drive shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile testing, and in particular to a device and method for testing the torque of a drive shaft of a new energy vehicle. Background Art

[0002] The torque control of the drive shaft of new energy vehicles is an important factor affecting the vehicle's power, economy, and drivability. Collecting the real-time drive shaft torque of the vehicle is particularly important for the development and energy consumption control of new energy vehicles. The vehicle drive shaft is a high-speed rotating component, and it is difficult to measure the torque signal by direct contact. In the existing torque test, it is generally tested by strain gauges. During the strain gauge test, if the strain gauge is not tightly fitted with the surface of the circular shaft, the measurement error will increase. Due to the high-speed rotation of the vehicle drive shaft, if the strain gauge is completely exposed to the air, it is easy to cause the edge deformation of the strain gauge, affecting the test results. For this reason, a new energy vehicle drive shaft torque test device is needed. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a new energy vehicle drive shaft torque testing device and method.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0005] A new energy vehicle drive shaft torque testing device, comprising:

[0006] A base, a conveying platform, a support plate 1, and a support plate 2, wherein the conveying platform, the support plate 1, and the support plate 2 are arranged on the base, the support plate 1 and the support plate 2 are located on both sides of the conveying platform, and the plate surfaces of the support plate 1 and the support plate 2 are respectively provided with a test mechanism 1 and a test mechanism 2, the test mechanism 1 and the test mechanism 2 are arranged opposite to each other, and the structures and installation methods of the test mechanism 1 and the test mechanism 2 are the same;

[0007] The testing mechanism includes a shifting assembly and a mounting ring. The shifting assembly is arranged on a supporting plate. A push plate 1 is arranged at the end of the shifting assembly. The push plate 1 is arranged vertically. A push rod is horizontally arranged on the plate surface of the push plate 1. Two push rods are arranged in parallel. A push plate 2 is arranged at the end of the push rod. The mounting ring is located on one side of the push plate 2. A bearing plate is arranged on the ring surface of the mounting ring. The bearing plate and the push plate 2 are arranged opposite to each other. A connecting column 1 is horizontally arranged on the plate surface of the push plate 2. A connecting sleeve 1 is horizontally arranged on the plate surface of the bearing plate. A set of connecting columns is arranged in the connecting sleeve 1. A spring 1 is sleeved on the connecting column 1 and the connecting sleeve 1. One end of the spring 1 is connected to the plate surface of the push plate 2, and the other end of the spring 1 is connected to the plate surface of the bearing plate. The testing assembly is arranged on the mounting ring.

[0008] As a further improvement of the present technical solution, a transmission assembly is arranged on the surface of push plate one, and the transmission assembly includes a motor and a spline sleeve. The motor is arranged on the surface of push plate one, and the output shaft of the motor is arranged horizontally. The spline sleeve is coaxially fixed to the output shaft end of the motor, and a strain gauge is pasted on the circumference of the automobile drive shaft. The strain gauge is connected to a wireless signal transmitter, and the wireless signal transmitter is connected to a signal receiver, and the signal receiver is connected to a computer terminal.

[0009] As a further improvement of the present technical solution, the test assembly includes a test ring, a guide column 1, and a shift ring. The test ring is rotatably sleeved in the mounting ring, the shift ring is on one side of the test ring and close to the push plate 2, the wall portion of the test ring is horizontally fixed with a guide column 1, the end of the guide column 1 is provided with a baffle, the inner ring surface of the shift ring is provided with a support plate 2, the shift ring is sleeved on the guide column 1 through the support plate 2, the guide column 1 is sleeved with a spring 2, one end of the spring 2 is in contact with the wall portion of the support plate 2, and the other end of the spring 2 is in contact with the wall portion of the test ring. The test ring has a plurality of trigger assemblies arranged on the circumference of the test ring, the trigger assembly comprises a connecting rod and a push pin, a through hole is provided on the ring surface of the test ring, the push pin is matched and inserted into the plug hole, one end of the connecting rod is connected to the wall of the shift ring, the other end of the connecting rod is connected to one end of the push pin, the other end of the push pin passes through the through hole, the connecting rod is arranged obliquely, and a pressing assembly is provided on the wall of the test ring, and a plurality of pressing assemblies are provided and evenly surround the wall of the test ring.

[0010] As a further improvement of the present technical solution, the pressing assembly includes a support plate 1, a guide column 2, and a pressure plate. The support plate 1 is fixed to the wall of the test ring and is close to the inner ring surface of the test ring. A baffle is arranged on the top of the guide column 2. The bottom of the guide column 2 passes through the plate surface of the support plate 1 and is fixedly connected to the pressure plate. Two guide columns 2 are provided and are arranged in parallel. The guide column 2 is perpendicular to the support plate 1. The pressure plate is close to the inner ring surface of the test ring. A spring 3 is sleeved on the guide column 2. One end of the spring 3 contacts the baffle at the top of the guide column 2, and the other end of the spring 3 contacts the plate surface of the support plate 1. A baffle 1 is vertically arranged on the base, and a baffle 2 is vertically arranged on the bottom of the mounting ring. The baffle 2 is arranged opposite to the baffle 1.

[0011] As a further improvement of the present technical solution, a protective plate is provided at one end of the test ring, and a protective shell is provided at the other end of the test ring. The protective plate and the protective shell are both made of rubber material. An escape hole for the drive shaft to pass through is opened at the center of the protective plate and the protective shell. An exhaust component for extracting air between the protective plate and the protective shell is provided on the test ring.

[0012] As a further improvement of the present technical solution, the exhaust assembly is provided with multiple and evenly surrounded on the inner ring surface of the shift ring, the exhaust assembly includes a support plate three, an exhaust cylinder, an air pump, and a piston. A support plate three is vertically arranged on the inner ring surface of the shift ring, the exhaust cylinder is vertically arranged on the plate surface of the support plate three, a drainage channel is opened on the wall of the test ring, one end of the drainage channel extends to the inner ring surface of the test ring, and the other end of the drainage channel extends to the wall of the test ring. The air pump is arranged on the wall of the test ring, one end of the air pump is connected with the drainage channel, and the other end of the air pump passes through the plate surface of the support plate three and extends into the exhaust cylinder. The piston is arranged at the end of the air pump and is in the exhaust cylinder. A spring four is sleeved on the air pump, one end of the spring four is in contact with the plate surface of the support plate three, and the other end of the spring four is in contact with the wall of the shift ring.

[0013] As a further improvement of the present technical solution, the wall of the vacuum cylinder is connected to an air inlet pipe, a one-way valve 2 is arranged in the air inlet pipe, the air inlet pipe is located between the piston and the support plate 3, and the wall of the exhaust cylinder is connected to an exhaust pipe, a one-way valve 1 is arranged in the exhaust pipe, the exhaust pipe is located between the piston and the support plate 3.

[0014] As a further improvement of the technical solution, a connecting plate is provided on the wall of the spline sleeve, a plug is fixedly provided horizontally on the end of the connecting plate, and a socket is provided on the wall of the test ring, which is opposite to the plug.

[0015] As a further improvement of the technical solution, a ball bearing is arranged on the surface of the push plate 2.

[0016] Compared with the prior art, the present invention has the following progress and advantages: during the use of the present invention, the pressure plate presses the strain gauge adhered to the circumference of the drive shaft, so that the strain gauge and the circumferential surface of the drive shaft are closely fitted, thereby improving the accuracy of the test; when the shift ring approaches the test ring, the piston moves in the exhaust pipe, thereby extracting the air between the protective plate and the protective shell; when the shift ring is reset and moves away from the test ring, the air between the exhaust pipe and the vacuum pipe is discharged through the exhaust pipe, thereby reducing the air between the protective plate and the protective shell, and avoiding interference of the air on the fit of the strain gauge and the drive shaft; when the spline sleeve matches the external spline at the end of the automobile drive shaft, the pin is inserted into the wall of the test ring, so that the test ring and the drive shaft can rotate synchronously, and the pressure plate stably presses the strain gauge adhered to the circumference of the drive shaft, thereby further improving the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the installation of the testing mechanism of the present invention.

[0020] Figure 3 It is a schematic diagram of the installation of the spline sleeve of the present invention.

[0021] Figure 4 This is a schematic diagram of installing the mounting ring of the present invention.

[0022] Figure 5 It is a schematic diagram of the cooperation between the shift ring and the test ring of the present invention.

[0023] Figure 6 It is a schematic diagram of the installation of the pressing plate of the present invention.

[0024] Figure 7 Schematic diagram of the exhaust assembly of the present invention.

[0025] Figure 8 It is a schematic diagram of the coordination of the exhaust pipe and the suction pipe of the present invention.

[0026] The figure shows:

[0027] 10. Base; 110. Conveying and carrying platform; 120. Support plate 1; 130. Support plate 2; 140. Baffle plate 1;

[0028] 20. Test mechanism 1; 210. Shift assembly; 211. Push plate 1; 212. Push rod; 213. Push plate 2; 214. Ball; 220. Mounting ring; 221. Loading plate; 222. Connecting column 1; 223. Connecting sleeve 1; 224. Baffle 2; 230. Motor; 231. Spline sleeve; 232. Connecting plate; 233. Latch; 240. Test assembly; 241. Test ring; 242. Guide column 1; 243, shift ring; 244, connecting rod; 245, push column; 246, support plate 1; 247, guide column 2; 248, pressure plate; 249, support plate 2; 250, exhaust assembly; 251, support plate 3; 252, exhaust cylinder; 253, suction cylinder; 254, piston; 255, discharge channel; 256, one-way valve 1; 257, one-way valve 2; 260, protective shell; 261, protective plate;

[0029] 30. Testing agency 2. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0031] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which 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. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1-Figure 8 As shown, a new energy vehicle drive shaft torque testing device comprises:

[0035] Base 10, conveying platform 110, support plate 1 120, support plate 2 130, conveying platform 110, support plate 1 120, support plate 2 130 are arranged on the base 10, support plate 1 120, support plate 2 130 are located on both sides of the conveying platform 110, and test mechanism 1 20 and test mechanism 2 30 are respectively arranged on the plate surface of support plate 1 120 and support plate 2 130, and test mechanism 1 20 and test mechanism 2 30 are arranged relatively, and the structures and installation methods of test mechanism 1 20 and test mechanism 2 30 are the same;

[0036] The test mechanism 1 20 includes a shift assembly 210 and a mounting ring 220. The shift assembly 210 (which is a prior art and will not be described in detail) is arranged on the support plate 1 120. A push plate 1 211 is arranged at the end of the shift assembly 210. The push plate 1 211 is arranged vertically. A push rod 212 is horizontally arranged on the plate surface of the push plate 1 211. Two push rods 212 are arranged in parallel. A push plate 213 is arranged at the end of the push rod 212. The mounting ring 220 is located on one side of the push plate 213. The ring surface of the mounting ring 220 is A carrying plate 221 is provided, and the carrying plate 221 is arranged opposite to the push plate 213. A connecting column 222 is horizontally provided on the plate surface of the push plate 213. A connecting sleeve 223 is horizontally provided on the plate surface of the carrying plate 221. The connecting column 222 is sleeved in the connecting sleeve 223. A spring 1 is sleeved on the connecting column 222 and the connecting sleeve 223. One end of the spring 1 is connected to the plate surface of the push plate 213, and the other end of the spring 1 is connected to the plate surface of the carrying plate 221. A test component 240 is provided on the mounting ring 220.

[0037] More specifically, a transmission assembly is arranged on the surface of the push plate 211, and the transmission assembly includes a motor 230 and a spline sleeve 231. The motor 230 is arranged on the surface of the push plate 211, and the output shaft of the motor 230 is arranged horizontally. The spline sleeve 231 is coaxially fixedly connected to the output shaft end of the motor 230. A strain gauge is pasted on the circumference of the vehicle drive shaft, and the strain gauge is connected to the wireless signal transmitter. The wireless signal transmitter is connected to a signal receiver, and the signal receiver is connected to a computer terminal. The vehicle drive shaft is placed on the conveying carrier 110, and the shifting assembly 210 drives the push plate 211 to move toward the end close to the vehicle drive shaft, and then the spline sleeve 231 matches the external spline at the end of the vehicle drive shaft. The motor 230 can drive the vehicle drive shaft to rotate, and the drive shaft torque test result is obtained according to the change in the resistance value of the strain gauge.

[0038] like Figure 3-Figure 6As shown, the test assembly 240 includes a test ring 241, a guide column 242, and a shift ring 243. The test ring 241 is rotatably sleeved in the mounting ring 220, the shift ring 243 is located on one side of the test ring 241 and close to the push plate 213, the wall of the test ring 241 is horizontally fixed with a guide column 242, the end of the guide column 242 is provided with a baffle, the inner ring surface of the shift ring 243 is provided with a support plate 249, the shift ring 243 is sleeved on the guide column 242 through the support plate 249, the guide column 242 is sleeved with a spring 2, one end of the spring 2 is in contact with the wall of the support plate 249, and the other end of the spring 2 is in contact with the test ring 241 The test ring 241 contacts the wall, a trigger assembly is connected between the shift ring 243 and the test ring 241, and a plurality of trigger assemblies are arranged evenly around the circumference of the test ring 241. The trigger assembly includes a connecting rod 244 and a push column 245. A through hole is provided on the annular surface of the test ring 241, and the push column 245 is matched and inserted into the insertion hole. One end of the connecting rod 244 is connected to the wall of the shift ring 243, and the other end of the connecting rod 244 is connected to one end of the push column 245. The other end of the push column 245 passes through the through hole. The connecting rod 244 is arranged obliquely, and a pressing assembly is provided on the wall of the test ring 241. A plurality of pressing assemblies are arranged evenly around the wall of the test ring 241.

[0039] More specifically, the pressing assembly includes a support plate 246, a guide column 247, and a pressure plate 248. The support plate 246 is fixed to the wall of the test ring 241 and is close to the inner ring surface of the test ring 241. A baffle is arranged on the top of the guide column 247. The bottom of the guide column 247 passes through the plate surface of the support plate 246 and is fixedly connected to the pressure plate 248. Two guide columns 247 are provided and are arranged in parallel. The guide column 247 is perpendicular to the support plate 246. The pressure plate 248 is close to the inner ring surface of the test ring 241. A spring 3 is sleeved on the guide column 247. One end of the spring 3 contacts the baffle on the top of the guide column 247, and the other end of the spring 3 contacts the plate surface of the support plate 246. A baffle 140 is vertically arranged on the base 10, and a baffle is vertically arranged on the bottom of the mounting ring 220. Plate 224, baffle plate 224 and baffle plate 1 140 are arranged opposite to each other, and the shifting assembly 210 drives the push plate 1 211 to move toward the end of the automobile drive shaft. After the spline sleeve 231 matches the external spline at the end of the automobile drive shaft, the baffle plate 224 contacts the baffle plate 1 140, and the shifting assembly 210 continues to drive the push plate 1 211 to move toward the end of the automobile drive shaft, thereby pushing the shifting ring 243 to move toward the mounting ring 220, and then the connecting rod 244 pushes the push column 245 to move toward the direction of the pressure plate 248, thereby driving the pressure plate 248 to move toward the circumference of the drive shaft, and the pressure plate 248 presses the strain gauge adhered to the circumference of the drive shaft, so that the strain gauge fits tightly with the circumferential surface of the drive shaft, thereby improving the accuracy of the test.

[0040] like Figure 5 , Figure 7-Figure 8As shown, a protective plate 261 is provided at one end of the test ring 241, and a protective shell 260 is provided at the other end of the test ring 241. The protective plate 261 and the protective shell 260 are both made of rubber material. An escape hole for the drive shaft to pass through is opened at the center of the protective plate 261 and the protective shell 260. An exhaust component 250 for extracting air between the protective plate 261 and the protective shell 260 is provided on the test ring 241.

[0041] More specifically, the exhaust assembly 250 is provided with multiple and uniformly surrounding the inner ring surface of the shift ring 243, and the exhaust assembly 250 includes a support plate 3 251, an exhaust cylinder 252, a suction cylinder 253, and a piston 254. The support plate 3 251 is vertically provided on the inner ring surface of the shift ring 243, and the exhaust cylinder 252 is vertically provided on the plate surface of the support plate 3 251. The wall of the test ring 241 is provided with a drainage channel 255, and one end of the drainage channel 255 extends to the inner ring surface of the test ring 241. The drainage channel 255 The other end of the vacuum cylinder 253 extends to the wall of the test ring 241. The vacuum cylinder 253 is arranged on the wall of the test ring 241. One end of the vacuum cylinder 253 is connected to the discharge channel 255. The other end of the vacuum cylinder 253 passes through the plate surface of the support plate three 251 and extends into the exhaust cylinder 252. The piston 254 is arranged at the end of the vacuum cylinder 253 and is in the exhaust cylinder 252. A spring four is sleeved on the vacuum cylinder 253. One end of the spring four contacts the plate surface of the support plate three 251, and the other end of the spring four contacts the wall of the shift ring 243.

[0042] More specifically, the wall of the vacuum cylinder 253 is connected to an air inlet pipe, a one-way valve 257 is provided in the air inlet pipe, the air inlet pipe is located between the piston 254 and the support plate 251, the wall of the exhaust cylinder 252 is connected to an exhaust pipe, a one-way valve 256 is provided in the exhaust pipe, the exhaust pipe is located between the piston 254 and the support plate 251, when the shift ring 243 approaches the test ring 241, the piston 254 moves in the exhaust cylinder 252, thereby extracting the air between the protective plate 261 and the protective shell 260, when the shift ring 243 is reset and away from the test ring 241, the air between the exhaust cylinder 252 and the vacuum cylinder 253 is discharged through the exhaust pipe, thereby reducing the air between the protective plate 261 and the protective shell 260, and avoiding the interference of the air on the fit between the strain gauge and the drive shaft.

[0043] like Figure 4As shown, the wall of the spline sleeve 231 is provided with a connecting plate 232, and a pin 233 is fixedly provided horizontally at the end of the connecting plate 232. A socket is opened on the wall of the test ring 241, and the socket is opposite to the pin 233. When the spline sleeve 231 matches the external spline at the end of the automobile drive shaft, the pin 233 is inserted into the wall of the test ring 241, so that the test ring 241 can rotate synchronously with the drive shaft, and the pressure plate 248 stably presses the strain gauge adhered to the circumference of the drive shaft, thereby further improving the test accuracy.

[0044] More specifically, a ball 214 is provided on the surface of the push plate 213 . When the push plate 213 pushes the shift ring 243 to move toward the test ring 241 , the ball 214 contacts the surface of the shift ring 243 , thereby reducing the friction of the shift ring 243 .

[0045] Working principle:

[0046] During use of the present invention, the automobile drive shaft is placed on the conveying bearing platform 110, and the shifting component 210 drives the push plate 211 to move toward the end of the automobile drive shaft, and then the spline sleeve 231 matches the external spline at the end of the automobile drive shaft. The motor 230 can drive the automobile drive shaft to rotate, and the drive shaft torque test result is obtained according to the change in the resistance value of the strain gauge. The shifting component 210 drives the push plate 211 to move toward the end of the automobile drive shaft. After the spline sleeve 231 matches the external spline at the end of the automobile drive shaft, the baffle plate 224 conflicts with the baffle plate 140, and the shifting component 210 continues to drive the push plate 211 to move toward the end of the automobile drive shaft, thereby pushing the shifting ring 243 to move toward the direction close to the mounting ring 220, and then the connecting rod 244 pushes the push column 245 to move toward the direction close to the pressure plate 248, thereby driving the pressure plate 248 to move toward the circumference of the drive shaft, and the pressure plate 248 is pasted The strain gauge on the circumference of the drive shaft is pressed so that the strain gauge and the circumferential surface of the drive shaft are closely fitted, thereby improving the accuracy of the test. When the shift ring 243 approaches the test ring 241, the piston 254 moves in the exhaust pipe 252, thereby extracting the air between the protective plate 261 and the protective shell 260. When the shift ring 243 is reset and moves away from the test ring 241, the air between the exhaust pipe 252 and the vacuum pipe 253 is discharged through the exhaust pipe, thereby reducing the air between the protective plate 261 and the protective shell 260, and avoiding the interference of the air on the fit of the strain gauge and the drive shaft. When the spline sleeve 231 matches the external spline at the end of the automobile drive shaft, the pin 233 is inserted into the wall of the test ring 241, so that the test ring 241 can rotate synchronously with the drive shaft, and the pressure plate 248 stably presses the strain gauge attached to the circumference of the drive shaft, thereby further improving the test accuracy.

[0047] It should be noted that the above specific implementations are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these changes do not deviate from the spirit of the present invention, they should be within the scope of protection of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. A new energy vehicle drive shaft torque test device, characterized in that: It includes: A base, a conveying platform, a support plate 1, and a support plate 2, wherein the conveying platform, the support plate 1, and the support plate 2 are arranged on the base, the support plate 1 and the support plate 2 are located on both sides of the conveying platform, and the plate surfaces of the support plate 1 and the support plate 2 are respectively provided with a test mechanism 1 and a test mechanism 2, the test mechanism 1 and the test mechanism 2 are arranged opposite to each other, and the structures and installation methods of the test mechanism 1 and the test mechanism 2 are the same; The testing mechanism 1 includes a shifting assembly and a mounting ring. The shifting assembly is arranged on a supporting plate 1. A push plate 1 is arranged at the end of the shifting assembly. The push plate 1 is arranged vertically. A push rod is horizontally arranged on the plate surface of the push plate 1. Two push rods are arranged in parallel. A push plate 2 is arranged at the end of the push rod. The mounting ring is located on one side of the push plate 2. A bearing plate is arranged on the ring surface of the mounting ring. The bearing plate and the push plate 2 are arranged oppositely. A connecting column 1 is horizontally arranged on the plate surface of the push plate 2. A connecting sleeve 1 is horizontally arranged on the plate surface of the bearing plate. A set of connecting columns is arranged in the connecting sleeve 1. A spring 1 is sleeved on the connecting column 1 and the connecting sleeve 1. One end of the spring 1 is connected to the plate surface of the push plate 2, and the other end of the spring 1 is connected to the plate surface of the bearing plate. The testing assembly is arranged on the mounting ring. A transmission assembly is arranged on the surface of the push plate 1, and the transmission assembly includes a motor and a spline sleeve. The motor is arranged on the surface of the push plate 1, and the output shaft of the motor is arranged horizontally. The spline sleeve is coaxially fixedly connected to the output shaft end of the motor. A strain gauge is pasted on the circumference of the automobile drive shaft, and the strain gauge is connected to the wireless signal transmitter, and the wireless signal transmitter is connected to a signal receiver, and the signal receiver is connected to the computer end; The test assembly comprises a test ring, a guide column 1 and a shift ring. The test ring is rotatably sleeved in the mounting ring. The shift ring is at one side of the test ring and close to the push plate 2. A guide column 1 is horizontally fixedly arranged on the wall of the test ring. A baffle is arranged at the end of the guide column 1. A support plate 2 is arranged on the inner ring surface of the shift ring. The shift ring is sleeved on the guide column 1 through the support plate 2. A spring 2 is sleeved on the guide column 1. One end of the spring 2 contacts the wall of the support plate 2, and the other end of the spring 2 contacts the wall of the test ring. A trigger assembly is connected between the shift ring and the test ring. The trigger assembly is provided with multiple groups and evenly surrounds the circumference of the test ring. The trigger assembly comprises a connecting rod and a push column. A through hole is opened on the ring surface of the test ring. The push column is matched and inserted into the jack. One end of the connecting rod is connected to the wall of the shift ring, and the other end of the connecting rod is connected to one end of the push column. The other end of the push column passes through the through hole. The connecting rod is arranged obliquely. A pressing assembly is provided on the wall of the test ring. The pressing assembly is provided with multiple groups and evenly surrounds the wall of the test ring. The pressing assembly includes a support plate 1, a guide column 2, and a pressure plate. The support plate 1 is fixed to the wall of the test ring and is close to the inner ring surface of the test ring. A baffle is arranged on the top of the guide column 2. The bottom of the guide column 2 passes through the plate surface of the support plate 1 and is fixedly connected to the pressure plate. Two guide columns 2 are provided and are arranged in parallel. The guide column 2 is perpendicular to the support plate 1. The pressure plate is close to the inner ring surface of the test ring. A spring 3 is sleeved on the guide column 2. One end of the spring 3 contacts the baffle on the top of the guide column 2, and the other end of the spring 3 contacts the plate surface of the support plate 1. A baffle 1 is vertically arranged on the base, and a baffle 2 is vertically arranged on the bottom of the mounting ring. The baffle 2 is arranged opposite to the baffle 1.

2. According to claim 1, a new energy vehicle drive shaft torque testing device is characterized in that: A protective plate is provided at one end of the test ring, and a protective shell is provided at the other end of the test ring. The protective plate and the protective shell are both made of rubber material. An escape hole for the drive shaft to pass through is opened in the center of the protective plate and the protective shell. An exhaust component for extracting air between the protective plate and the protective shell is provided on the test ring.

3. According to claim 2, a new energy vehicle drive shaft torque testing device is characterized in that: The exhaust assembly is provided with multiple and evenly surrounded on the inner ring surface of the shift ring, the exhaust assembly includes a support plate three, an exhaust cylinder, an air pump, and a piston. The support plate three is vertically arranged on the inner ring surface of the shift ring, the exhaust cylinder is vertically arranged on the plate surface of the support plate three, a discharge channel is opened on the wall of the test ring, one end of the discharge channel extends to the inner ring surface of the test ring, and the other end of the discharge channel extends to the wall of the test ring. The air pump is arranged on the wall of the test ring, one end of the air pump is connected with the discharge channel, and the other end of the air pump passes through the plate surface of the support plate three and extends into the exhaust cylinder. The piston is arranged at the end of the air pump and is in the exhaust cylinder. A spring four is sleeved on the air pump, one end of the spring four contacts with the plate surface of the support plate three, and the other end of the spring four contacts with the wall of the shift ring.

4. A new energy vehicle drive shaft torque testing device according to claim 3, characterized in that: The wall of the vacuum cylinder is connected with an air inlet pipe, a one-way valve 2 is arranged in the air inlet pipe, the air inlet pipe is located between the piston and the support plate 3; the wall of the exhaust cylinder is connected with an exhaust pipe, a one-way valve 1 is arranged in the exhaust pipe, the exhaust pipe is located between the piston and the support plate 3.

5. According to claim 1, a new energy vehicle drive shaft torque testing device is characterized in that: The wall of the spline sleeve is provided with a connecting plate, the end of the connecting plate is horizontally fixed with a plug, and the wall of the test ring is provided with a plug, which is opposite to the plug.

6. A new energy vehicle drive shaft torque testing device according to claim 1, characterized in that: A ball bearing is arranged on the plate surface of the push plate 2.

7. A method for testing the torque of a drive shaft of a new energy vehicle, applied to a device for testing the torque of a drive shaft of a new energy vehicle as claimed in any one of claims 1 to 6, wherein the method comprises the following steps: S1. The automobile drive shaft is placed on the conveying bearing platform, and the shifting assembly drives the push plate 1 to move toward the end of the automobile drive shaft, and then the spline sleeve matches the external spline at the end of the automobile drive shaft. The motor can drive the automobile drive shaft to rotate. According to the change in the resistance value of the strain gauge, the test result of the drive shaft torque is obtained. The shifting assembly drives the push plate 1 to move toward the end of the automobile drive shaft. After the spline sleeve matches the external spline at the end of the automobile drive shaft, the baffle 2 contacts the baffle 1, and the shifting assembly continues to drive the push plate 1 to move toward the end of the automobile drive shaft, thereby pushing the shifting ring to move toward the direction close to the mounting ring, and then the connecting rod pushes the push column to move toward the direction close to the pressure plate, thereby driving the pressure plate to move toward the circumference of the drive shaft, and the pressure plate presses the strain gauge attached to the circumference of the drive shaft, so that the strain gauge fits tightly with the circumferential surface of the drive shaft; S2. When the shift ring approaches the test ring, the piston moves in the exhaust cylinder to extract the air between the protective plate and the protective shell. When the shift ring is reset and moves away from the test ring, the air between the exhaust cylinder and the vacuum cylinder is discharged through the exhaust pipe, thereby reducing the air between the protective plate and the protective shell and avoiding interference of the air on the fit between the strain gauge and the drive shaft.

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