CN217741405U

CN217741405U - Power measurement test bed for electric drive axle

Info

Publication number: CN217741405U
Application number: CN202221915394.XU
Authority: CN
Inventors: 张华平
Original assignee: Luoyang Heneng Electric Co ltd
Current assignee: Luoyang Heneng Electric Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-11-04
Anticipated expiration: 2032-07-25

Abstract

The utility model provides an electric drive axle power measurement test bed, which comprises a base, supporting seats, an electric drive axle to be measured, a load motor, a torque sensor and an encoder, wherein the two sides of the upper part of the base are respectively provided with the supporting seats, and the inner side of each supporting seat is provided with the load motor; the load motor is a permanent magnet motor and comprises a main shaft, an outer stator component, an inner rotor component and a shell, wherein one end of the main shaft is arranged in the supporting seat through a bearing, and the other end of the main shaft is connected to the outer end face of the hub through a connecting flange; the shell is sleeved on the main shaft through a bearing and is positioned between the wheel hub and the supporting seat, and the end face of the shell is fixedly connected with the end face of the inner side of the supporting seat. The utility model discloses set load motor to inner rotor and outer stator structure, the rotor subassembly passes through flange and links firmly with wheel hub, directly drives wheel hub and rotates, and stator module sets up at the outside and immovable of motor, and compact structure reduces area, has reduced the mechanical transmission link, has improved efficiency, has also reduced the fault incidence simultaneously.

Description

Power measurement test bed for electric drive axle

Technical Field

The utility model relates to an electricity drives the vehicle test technique, specifically is an electric drive axle power testing platform.

Background

The electric drive axle is located at the end of the vehicle transmission and can vary the speed and torque from the transmission and transmit the speed and torque to the drive wheels via the electric drive axle. Because the electric drive axle plays an important role in vehicle driving, the performances of the designed electric drive axle in the aspects of speed reducer efficiency, motor efficiency, system efficiency and the like need to be tested to ensure that various performances of the electric drive axle meet requirements.

The electric drive axle power measurement test bed applies load to an electric drive axle to be measured so as to simulate the load of the electric drive axle from the aspects of a road surface, a frame, an automobile body and the like in actual use, when an external power source inputs power to the electric drive axle to be measured, the electric drive axle to be measured drives a hub to rotate, and data such as the rotating speed and the torque of a wheel shaft are the basis for judging the performance of the electric drive axle.

The accurate determination of the performance of an electric drive axle requires a long uninterrupted test. The existing electric drive axle test bed usually uses a variable frequency motor as a power source, the variable frequency motor applies a load to an electric drive axle to be tested through a speed reducing mechanism and a transmission mechanism, and when the load is applied, mechanical transmission links are more, the efficiency is low, and the failure occurrence rate is high.

Disclosure of Invention

To the problem that exists in the background art, the utility model aims at providing an electric drive axle power testing platform, it applys the load to electric drive axle through inner rotor permanent-magnet machine, has left out reduction gears and drive mechanism, has that power loss is little, simple structure easily maintains, area a great deal of advantage such as little.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an electric drive axle power measurement test bed comprises a base, a supporting seat, an electric drive axle to be measured, a load motor, a torque measurer and an encoder, wherein the electric drive axle to be measured comprises a drive motor, a differential mechanism, axles, axle sleeves, hubs and brake shoes;

two sides of the upper part of the base are respectively provided with a supporting seat, two supporting frames which are parallel at intervals are arranged between the two supporting seats, and shaft sleeves at two ends of the electric drive bridge to be tested are respectively arranged on the corresponding supporting frames; a load motor is arranged on the inner side of each supporting seat;

the load motor is a permanent magnet motor and comprises a main shaft, a rotor assembly, a stator assembly and a shell, wherein one end of the main shaft is arranged in the supporting seat through a bearing, and the other end of the main shaft is connected to the outer end face of the hub through a connecting flange; the shell is sleeved on the main shaft through a bearing and is positioned between the wheel hub and the supporting seat, and the end face of the shell is fixedly connected with the end face of the inner side of the supporting seat;

the rotor assembly is fixedly arranged on the main shaft, and the stator assembly with permanent magnet property is fixedly arranged in the shell, corresponds to the rotor assembly and is used for providing a rotating resistance magnetic field for the rotor assembly;

the torque measurer comprises a rotating part, a static part and a pressure sensor; the rotating part is rotatably connected to the stationary part; the pressure sensor is arranged between the rotating part and the static part and used for sensing the torsion of the rotating part relative to the static part when the rotating part rotates; the rotating part is fixedly arranged on the main shaft, and the static part is fixedly arranged on the shell.

The stator assembly comprises a plurality of stator auxiliary shafts and a plurality of magnetic steel substrates which are uniformly distributed on the stator auxiliary shafts along the axial lead of the main shaft, and the stator auxiliary shafts are fixedly arranged inside the shell.

The rotor assembly comprises a plurality of rotor bases and rotor units, the rotor bases are fixedly installed on the main shaft along the axis of the main shaft, and the rotor units are fixedly installed on the rotor bases.

The rotor unit comprises a plurality of rotor modules in a disc structure; each rotor module comprises a rotor core and a rotor winding wound on the rotor core; the rotor bases are of disc structures, and the rotor modules are distributed on the rotor bases to which the rotor modules belong.

The encoder comprises a coded disc and an induction element for inducing the coded disc, wherein the coded disc is arranged at the end part of the spindle, and the induction element is arranged on the supporting seat and corresponds to the coded disc.

The two sides of the upper part of the base are respectively provided with a guardrail, the two guardrails are respectively positioned on two sides of a wheel shaft of the electric drive axle to be tested, a protective cover for covering the electric drive axle to be tested is arranged above the two guardrails, and two sides of the protective cover are respectively and correspondingly connected with one guardrail.

The utility model has the advantages that: compared with the prior art, the permanent magnet motor has the advantages that the load motor is set to be the permanent magnet motor with the inner rotor structure and the outer stator structure, the rotor assembly is fixedly connected with the hub through the connecting flange to directly drive the hub to rotate, the stator assembly is arranged outside the motor and is fixed, the structure is compact, the occupied area is reduced, the mechanical transmission link is reduced, the efficiency is improved, and the fault occurrence rate is reduced; the dynamic response capability is improved because no mechanical transmission is adopted; and the permanent magnet motor has high control precision relative to the asynchronous motor, the permanent magnet synchronous motor directly provides electromagnetic resistance force to the hub, intermediate transmission parts are reduced, the controllability of equipment is improved, the control precision is high, and the accuracy of detection data is enhanced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view of a load motor.

Fig. 3 is a perspective view of the present invention.

In the figure, the device comprises a base 1, a base 2, a supporting seat 4, a load motor 5, a torque measurer 6, an encoder 7 and a connecting flange; 11. a support frame 12, a guardrail 13 and a shield; 31. the brake comprises a driving motor, 32, a differential mechanism, 33, an axle, 34, a shaft sleeve, 35, a hub, 36 and brake shoes; 41. the rotor comprises a main shaft, 42, a rotor assembly, 43, a stator assembly, 44, a shell, 421, a rotor base, 422, a rotor unit, 431, a stator auxiliary shaft, 432, a magnetic steel substrate, 433 and magnetic steel; 51. a rotating portion 52, a stationary portion 53, and a pressure sensor; 61. sensing code disc, 62, sensing element.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

The utility model provides an electric drive axle power test bench, including base 1, supporting seat 2, the electric drive axle that awaits measuring, load motor 4, torque measurement ware 5 and encoder 6, the electric drive axle that awaits measuring include driving motor 31, differential mechanism 32, shaft 33, axle sleeve 34, wheel hub 35 and brake shoe 36, differential mechanism 32 its input connect driving motor 31's output shaft, a shaft 33 is connected respectively to two outputs of differential mechanism 32, the other end of shaft 33 all fixedly connected with wheel hub 35, all overlap in the outside of every shaft and be equipped with axle sleeve 34, axle sleeve 34 one end links firmly with differential mechanism 32 shell, and the other end passes through bearing connection wheel hub 35, and the medial surface of every wheel hub 35 all is equipped with brake shoe 36; the electric drive axle power measurement test bed is characterized in that:

two sides of the upper part of the base 1 are respectively provided with a supporting seat 2, two supporting frames 11 which are parallel at intervals are arranged between the two supporting seats 2, and shaft sleeves 34 at two ends of the electric drive bridge to be tested are respectively arranged on the corresponding supporting frames 11; a load motor 4 is arranged on the inner side of each supporting seat 2;

the load motor 4 is a permanent magnet motor and comprises a main shaft 41, a stator assembly 43, a rotor assembly 42 and a shell 44, wherein one end of the main shaft 41 is installed inside the supporting seat 2 through a bearing, and the other end of the main shaft is connected to the outer end face of the hub 35 through a connecting flange 7; the shell 44 is sleeved on the main shaft 41 through a bearing and is positioned between the hub 35 and the support seat 2, and the end surface of the shell 44 is fixedly connected with the end surface of the inner side of the support seat 2;

the rotor assembly 42 is fixedly installed on the main shaft 41, and the stator assembly 43 with permanent magnetic property is fixedly installed inside the housing 44, corresponds to the rotor assembly 42, and is used for providing a rotating resistance magnetic field for the rotor assembly 42;

the torque measuring device 5 includes a rotating portion 51, a stationary portion 52, and a pressure sensor 53; the rotating portion 51 is rotatably connected to the stationary portion 52; the pressure sensor 53 is disposed between the rotating portion 51 and the stationary portion 52, and is configured to sense a torque force of the rotating portion 51 relative to the stationary portion 52 when the rotating portion rotates; the rotating portion 51 is fixedly attached to the main shaft 41, and the stationary portion 52 is fixedly attached to the housing 44.

The principle of the utility model is as follows: when the electric drive axle is started, the drive motor 31 drives the two wheel shafts 33 to rotate through the differential 32, the wheel shafts 33 drive the wheel hubs 35 to rotate, and because the wheel hubs 35 are fixedly connected with the rotor assemblies 42 of the permanent magnet motors, at the moment, the resistance of the vehicle in the road driving process can be automatically simulated by adopting the full-electric inertia simulation technology under the electromagnetic force action of the stator assemblies 43 and the rotor assemblies 42 of the permanent magnet motors, so that the measurement of each parameter of the vehicle driving process is realized. The encoder 6 is used for detecting the rotating speed and the rotating angle of the wheel axle 33, the stator assembly 42 generates force on the rotor assembly 43 fixedly connected to the wheel axle 33, and simultaneously, the rotor assembly 43 generates reaction force on the stator assembly 42 due to the mutual force, and the reaction force is transmitted to the torque measurer 5 to be measured.

Specifically, since the specific structure of the torque measuring device 5 is a known technology, the present invention does not describe the structure of each part in detail, but limits the mounting position corresponding to the structure of each part.

The stator assembly 43 comprises a plurality of stator auxiliary shafts 431 and a plurality of magnetic steel base plates 432 uniformly distributed on the stator auxiliary shafts 431 along the axial lead of the main shaft 41, magnetic steel 433 is installed on the magnetic steel base plates 432, and the stator auxiliary shafts 431 are fixedly installed inside the shell 44.

The rotor assembly 42 includes a plurality of rotor bases 421 and rotor units 422, the rotor bases 421 are fixedly mounted on the main shaft 41 along the axial line of the main shaft 41, and the rotor units 422 are fixedly mounted on the rotor bases 421.

The rotor unit 422 comprises a plurality of rotor modules in a disc structure; each rotor module comprises a rotor core and a rotor winding wound on the rotor core; the rotor bases 421 are disc-shaped structures, and the rotor modules are distributed on the respective rotor bases 421.

The encoder 6 comprises a code wheel 61 and a sensing element 62 for sensing the code wheel 61, wherein the code wheel 61 is arranged at the end part of the main shaft 41, and the sensing element 62 is arranged on the supporting seat 2 and corresponds to the code wheel 61. Specifically, since the specific structure of the encoder 6 is also a known technology, the present invention does not describe each part structure in detail, but limits the mounting position corresponding to each part structure.

The two sides of the upper part of the base 1 are respectively provided with a guardrail 12, the two guardrails 12 are respectively positioned at two sides of a wheel shaft 33 of the electric drive axle to be tested, a protective cover 13 covering the electric drive axle to be tested is arranged above the two guardrails 12, and two sides of the protective cover 13 are respectively and correspondingly connected with one guardrail 12.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

The part of the utility model not detailed is prior art.

Claims

1. An electric drive axle work test bed comprises a base (1), a supporting seat (2), an electric drive axle to be tested, a load motor (4), a torque measurer (5) and an encoder (6), wherein the electric drive axle to be tested comprises a drive motor (31), a differential (32), a wheel shaft (33), a shaft sleeve (34), a wheel hub (35) and brake shoes (36), the input end of the differential (32) is connected with the output shaft of the drive motor (31), two output ends of the differential (32) are respectively connected with the wheel shaft (33), the other end of the wheel shaft (33) is fixedly connected with the wheel hub (35), the outer part of each wheel shaft is sleeved with the shaft sleeve (34), one end of the shaft sleeve (34) is fixedly connected with the shell of the differential (32), the other end of the shaft sleeve is connected with the wheel hub (35) through a bearing, and the inner side face of each wheel hub (35) is provided with the brake shoes (36); the electric drive axle power measurement test bed is characterized in that:

the two sides of the upper part of the base (1) are respectively provided with a supporting seat (2), two supporting frames (11) which are parallel at intervals are arranged between the two supporting seats (2), and shaft sleeves (34) at two ends of the electric drive bridge (3) to be tested are respectively arranged on the corresponding supporting frames (11); a load motor (4) is arranged on the inner side of each supporting seat (2);

the load motor (4) is a permanent magnet motor and comprises a main shaft (41), a rotor assembly (42), a stator assembly (43) and a shell (44), one end of the main shaft (41) is installed inside the supporting seat (2) through a bearing, and the other end of the main shaft is connected to the outer end face of the hub (35) through a connecting flange (7); the outer shell (44) is sleeved on the main shaft (41) through a bearing and is positioned between the wheel hub (35) and the supporting seat (2), and the end face of the outer shell (44) is fixedly connected with the end face of the inner side of the supporting seat (2);

the rotor assembly (42) is fixedly arranged on the main shaft (41), and the stator assembly (43) with permanent magnetic property is fixedly arranged in the shell (44) and corresponds to the rotor assembly (42) and is used for providing a rotating resistance magnetic field for the rotor assembly (42);

the torque measuring device (5) comprises a rotating part (51), a static part (52) and a pressure sensor (53); the rotating part (51) is rotatably connected to the stationary part (52); the pressure sensor (53) is arranged between the rotating part (51) and the static part (52) and is used for sensing the torsion of the rotating part (51) relative to the static part (52) when rotating; the rotating part (51) is fixedly arranged on the main shaft (41), and the static part (52) is fixedly arranged on the shell (44).

2. The electric drive axle work test bed of claim 1, wherein: the stator assembly (43) comprises a plurality of stator auxiliary shafts (431) and a plurality of magnetic steel base plates (432) which are uniformly distributed on the stator auxiliary shafts (431) along the axial lead of the main shaft (41), and the stator auxiliary shafts (431) are fixedly installed inside the shell (44).

3. The electric drive axle work test bed according to claim 1, wherein: the rotor assembly (42) comprises a plurality of rotor bases (421) and rotor units (422), the rotor bases (421) are fixedly mounted on the main shaft (41) along the axial lead of the main shaft (41), and the rotor units (422) are fixedly mounted on the rotor bases (421).

4. The electric drive axle work test bed according to claim 3, wherein: the rotor unit (422) comprises a plurality of rotor modules in a disc structure; each rotor module comprises a rotor core and a rotor winding wound on the rotor core; the rotor bases (421) are in a disc structure, and the rotor modules are distributed on the rotor bases (421) to which the rotor modules belong.

5. The electric drive axle work test bed according to claim 1, wherein: the encoder (6) comprises a coded disc (61) and an induction element (62) for inducing the coded disc (61), the coded disc (61) is installed at the end part of the main shaft (41), and the induction element (62) is installed on the supporting seat (2) and corresponds to the coded disc (61).

6. The electric drive axle work test bed of claim 1, wherein: base (1) upper portion both sides be equipped with guardrail (12) respectively, two guardrails (12) are located the shaft of awaiting measuring electric drive axle (33) both sides respectively, two guardrail (12) tops are equipped with guard shield (13) that cover the electric drive axle that awaits measuring, guard shield (13) both sides correspond respectively and connect a guardrail (12).