Electric drive bridge bench test device

Abstract

The utility model discloses an electric drive bridge bench test device, which comprises an input dynamometer matched with the input end of an electric drive bridge and an output dynamometer matched with the output end of the electric drive bridge. The device is characterized by further comprising a three-axis adjusting platform, a gear box matched with the input end of the electric drive axle and a bearing support matched with the output end of the electric drive axle, and a fixing frame used for fixing the electric drive axle is arranged on the three-axis adjusting platform. The rotating speed is increased through the gear transmission box, the 90-degree transmission direction is converted, and the gear transmission box and the output end form a parallel structure. And the function of verifying the performance of the electric drive axle by the traditional drive axle bench test equipment is realized. And through the bearing support, on the premise that the coaxiality is guaranteed, the overall rigidity is improved, and vibration is reduced. According to the scheme, the requirement for performance verification of the electrically driven bridge abutment is effectively met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile electric drive axle test, specifically relates to an electric drive axle rack test device. BACKGROUND

[0002] The axle dynamometer is a device for testing the performance of the axle, and is mainly used for evaluating the dynamic performance, fuel economy and emission performance of the axle. Figure 3 As shown in the drawings, the axle dynamometer device mainly comprises an input dynamometer, an output dynamometer and a control system, the input end provides a maximum speed of 6000 revolutions per minute, during testing, the input dynamometer 10 and the output dynamometer 11 are connected to the fuel axle 14 through a transmission shaft, and the axle is simply supported through the support 13 arranged on the transmission shaft, and then the axle is tested. The existing device can realize the comprehensive performance test of the traditional fuel axle, and is one of important devices for verifying the design of the axle product.

[0003] However, with the rapid development of the automobile industry, the production and sales of electric vehicles have shown an increasing trend in recent years, and the structure of the electric drive axle has changed greatly compared with the structure of the fuel vehicle axle. The traditional T-shaped structure is changed into an h-shaped structure, that is, the input shaft and the output end are arranged in parallel instead of vertically. The existing device cannot adapt to the new axle structure. In addition, due to the enhanced dynamic performance of the electric vehicle, the speed of the existing input end cannot meet the testing needs of high performance.

[0004] Therefore, a new electric drive axle testing device is urgently needed. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an electric drive axle rack test device to solve the problems existing in the current test verification process.

[0006] The utility model is implemented by the following technical scheme: an electric drive axle rack test device comprises an input dynamometer matched with the input end of the electric drive axle and an output dynamometer matched with the output end of the electric drive axle; characterized by further comprising a three-axis adjustment platform, a fixing frame for fixing the electric drive axle is arranged on the platform, further comprising a gear box matched with the input end of the electric drive axle and a bearing support matched with the output end of the electric drive axle.

[0007] Further, the input dynamometer and the input end of the gear box are connected through a low-speed transmission shaft, the input end of the electric drive axle and the output end of the gear box are connected through a high-speed transmission shaft, and the output end of the electric drive axle and the output dynamometer are connected through an output transmission shaft.

[0008] Further, the bearing support and the output transmission shaft are matched through a bearing.

[0009] Further, the gear box is a variable speed gear box, and the speed ratio of the input and output is 1:2.

[0010] Further, the included angle between the input end and the output end of the gear box is 90 degrees.

[0011] The utility model discloses a beneficial effect is: through gear transmission box improves the rotational speed and converts 90 transmission direction, and forms parallel structure with output end. Realized the function of traditional drive axle rack test equipment to do electric drive axle performance verification. Gear transmission box, bearing support, electric drive axle set in three axle adjustment flat top, through adjusting XYZ three directions, realize overall adjustment, reduce the work difficulty, increase installation precision. Through bearing support, guarantee the coaxial degree under the premise, also improve the overall rigidity, reduce the vibration. The scheme effectively satisfies the need of electric drive axle rack performance verification. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model will be further described below in combination with the drawings.

[0013] Figure 1 It is the whole structure schematic diagram of the utility model;

[0014] Figure 2 It is the overhead structure schematic diagram of the utility model;

[0015] Figure 3 It is the structure schematic diagram of the prior art rack test device.

[0016] The serial number in the drawing is explained: 1 is electric drive axle, 2 is three axle adjustment platform, 3 is fixed frame, 4 is gear box, 5 is bearing support, 6 is low speed transmission shaft, 7 is high speed transmission shaft, 8 is output transmission shaft, 9 is second adjustment platform, 10 is input dynamometer, 11 is output dynamometer, 12 is shaft coupling, 13 is support, 14 is fuel vehicle axle. DETAILED DESCRIPTION

[0017] The technical scheme of each embodiment of the utility model will be described clearly and completely in combination with the drawings below, and obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment described in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor are within the scope of the utility model.

[0018] Reference is made to the drawings Figures 1-3The utility model discloses an electric drive axle rack test device, including with the input dynamometer 10 of cooperation of electric drive axle 1 and with the output dynamometer 11 of cooperation of electric drive axle's output end two groups, still including three -axis adjustment platform 2, this three -axis adjustment platform can carry out small -range X, Y and Z adjustment to provide better coaxial degree, be provided with the fixing frame 3 for fixing electric drive axle on the platform, and the fixing frame is fixed with the platform through bolt, and electric drive axle is fixed on the fixing frame through bolt.

[0019] Preferably: the input dynamometer is connected with the input end of the gear box through the low -speed transmission shaft 6, and the input end of the electric drive axle is connected with the output end of the gear box through the high -speed transmission shaft 7; the output end of the electric drive axle is connected with the output dynamometer through the output transmission shaft 8. Among them, the both ends of each transmission shaft are provided with the shaft coupling 12 (or shaft coupling assembly), and the shaft coupling has certain angle and distance compensation function. The position and angle change caused by the small movement of the three -axis adjustment platform can be compensated, so that the transmission of the transmission shaft is guaranteed.

[0020] Preferably: the bearing support is fixed on the three -axis adjustment platform through bolt, and the bearing support is located at one side or both sides of electric drive axle close to electric drive axle, the bearing of bearing support is coaxial with the output transmission shaft, and the bearing support is matched with the output transmission shaft through bearing.

[0021] Preferably: the gear box is a variable speed gear box, and the speed ratio of input and output is 1:2. Usually, the input end speed is 6000r / min, and the output end speed is 12000r / min.

[0022] Preferably: the included angle of the two shafts of the input end and the output end of the gear box is 90 degrees.

[0023] Embodiment 1: the utility model discloses an electric drive axle rack test device, including with the input dynamometer 10 of cooperation of electric drive axle 1 and with the output dynamometer 11 of cooperation of electric drive axle's output end two groups, still including three -axis adjustment platform 2, this three -axis adjustment platform, set fixing frame and bearing seat on the three -axis adjustment platform,

[0024] The fixing frame and the bearing seat are fixed on the platform through bolts, and a plurality of bolt hole positions are arranged on the platform, so that the position can be adjusted.

[0025] The bearing seat has 1-3 groups, respectively corresponding to the high -speed transmission shaft and the output transmission shaft. The coaxial degree of each transmission shaft and the cooperation part of electric drive axle is guaranteed, and a small amount of deviation is compensated through the shaft coupling assembly such as universal joint coupling on the other end of the transmission shaft.

[0026] The second adjusting platform is arranged below the bearing seat and is bolted with the three-axis adjusting platform.

[0027] The working process of the embodiment is as follows: the electric drive axle is bolted on the fixed table and adjusted to the appropriate height, the input end of the electric drive axle is connected with the output end of the gear box through the low-speed output shaft, and the output end of the electric drive axle is connected with the output dynamometer through the output shaft, and the output shaft is matched with the bearing support.

[0028] During the test, the fixed frame can provide good support and limiting effect for the electric drive axle, and the bearing seat can effectively improve the coaxiality of the input and output shafts. The gear box improves the speed of the input end, effectively meeting the test requirements of the electric drive axle. At the same time, the above structure ensures the rigidity of transmission and improves the stability during the test, reduces the vibration of the electric drive axle and other factors affecting the test results; it also eliminates the problem that the transmission shaft needs to bear the gravity in the prior art, so that the transmission shaft only bears the torsion, improves the test stability and also improves the service life of the transmission shaft.

[0029] The structure of the scheme, when disassembling or replacing the electric drive axle, usually only needs to disassemble the connection between each transmission shaft and the electric drive axle, and after disassembly, each transmission shaft maintains a horizontal state under the action of the bearing support, without disassembling the other end of the transmission shaft, not only prevents the risk caused by frequent disassembly of the transmission shaft, but also reduces the work intensity and improves the work efficiency.

[0030] In the scheme, the high-speed and low-speed transmission shafts and the output transmission shaft are all transmission shafts, and the high-speed and low-speed in front are only used for distinction and do not serve as a limitation. The three-axis adjusting platform and the second adjusting platform in the scheme can realize adjustment in XYZ three directions, and the specific structure is the adjusting platform in the prior art, such as the adjusting platform disclosed in the patent with the publication number CN209364112U.

Claims

1. A test apparatus for an electric drive bridge, comprising an input dynamometer that engages with the input end of the electric drive bridge and an output dynamometer that engages with the output end of the electric drive bridge; characterized in that: It also includes a three-axis adjustment platform, on which a mounting bracket for fixing the electric drive axle is provided, as well as a gearbox that mates with the input end of the electric drive axle and a bearing support that mates with the output end of the electric drive axle.

2. The electric drive bridge test bench according to claim 1, characterized in that: The input dynamometer is connected to the input end of the gearbox via a low-speed drive shaft, and the input end of the electric drive axle is connected to the output end of the gearbox via a high-speed drive shaft; the output end of the electric drive axle is connected to the output dynamometer via an output drive shaft.

3. The electric drive bridge test bench according to claim 1, characterized in that: The bearing support and the output drive shaft are fitted together by bearings.

4. The electric drive bridge test bench according to claim 1, characterized in that: The gearbox is a variable speed gearbox with an input-output speed ratio of 1:

2.

5. The electric drive bridge test bench according to claim 1, characterized in that: The angle between the input and output ends of the gearbox is 90 degrees.

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