New energy automobile high-speed motor test bench transmission device

Abstract

The utility model provides a new energy automobile high-speed motor test bench transmission device. The new energy automobile high-speed motor test bench transmission device comprises a spline shaft, an internal spline flange, a torque sensor, a bearing seat and a diaphragm coupling. One end of the spline shaft is connected with an output shaft of the high-speed motor, the other end of the spline shaft is connected with the internal spline flange, the internal spline flange is connected with the bearing seat through the torque sensor, and the bearing seat is connected with the dynamometer through the diaphragm coupling. The double spline shafts are connected with the tested motor, a certain gap is reserved due to spline fit, so that compensation and centering can be achieved, the diameter of the spline shafts is small, rotational inertia and unbalanced mass can be reduced, a shaft system is more stable during high-speed rotation, and small vibration excitation is generated.

Description

Technical Field

[0001] This utility model relates to the field of motor testing devices, specifically to a transmission device for a high-speed motor testing bench for new energy vehicles. Background Technology

[0002] High-speed motors for new energy applications are characterized by high speed, large vibration, high alignment requirements, high measurement accuracy, and high transmission device temperature. Therefore, when testing high-speed motors for new energy applications, it is necessary to meet the requirements of high speed, large vibration, high alignment requirements, high measurement accuracy, and high transmission device temperature. Utility Model Content

[0003] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a transmission device for a high-speed motor test bench for new energy vehicles.

[0004] According to the present invention, a transmission device for a high-speed motor test bench for new energy vehicles includes: a splined shaft, an inner splined flange, a torque sensor, a bearing housing, and a diaphragm coupling.

[0005] One end of the splined shaft is connected to the output shaft of the high-speed motor, and the other end is connected to the inner splined flange. The inner splined flange is connected to the bearing housing through a torque sensor, and the bearing housing is connected to the dynamometer through a diaphragm coupling.

[0006] Preferably, the splined shaft is mounted on the side of the inner splined flange facing away from the bearing housing via a retaining ring.

[0007] Preferably, the bearing housing is an oil-air lubricated bearing housing and is equipped with water channels for water cooling.

[0008] Preferably, the diaphragm coupling is provided with two sets of diaphragms connected in series.

[0009] Preferably, the spline shaft is a double spline shaft with splines at both ends, and the diameter of the splined portions at both ends of the spline shaft is larger than the diameter of the middle portion.

[0010] Preferably, the bearing housing is equipped with a locking pin, which allows the rotation of the bearing housing shaft to be locked radially by means of the locking pin.

[0011] Preferably, the retaining ring is a ring-shaped structure formed by two semi-circular rings, and the retaining ring is sleeved around the middle part of the spline shaft.

[0012] Preferably, the diameter of the spline portion of the spline shaft is larger than the diameter of the inner ring of the retaining ring.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This application uses a double spline shaft to connect the tested motor. Because the spline fit leaves a certain clearance, it can compensate for the misalignment. Because the spline shaft diameter is small (≤35mm), it can reduce the moment of inertia and unbalanced mass, making the shaft system more stable when rotating at high speed and generating less vibration excitation.

[0015] 2. This application uses two crescent-shaped retaining rings to fix the spline shaft, so that the spline shaft has a small amount of axial movement. The spline shaft will not jam due to being too tight, nor will it vibrate or make abnormal noise due to being too loose.

[0016] 3. The torque sensor is installed between the test piece and the bearing housing. This position is closer to the test motor than when the torque sensor is installed on the dynamometer, which avoids inaccurate torque measurement caused by the test motor being too far away from the torque sensor.

[0017] 4. The bearing housing of this application adopts oil-air lubrication and water cooling, which enables the bearing housing to meet high-speed applications and avoids damage to the bearing due to excessive bearing temperature.

[0018] 5. The bearing housing is equipped with a locking pin, which facilitates shaft installation and prevents the drive shaft from rotating when tightening the screws. At the same time, this locking pin can be used to lock the shaft when calibrating the torque sensor.

[0019] 6. This application uses a double diaphragm coupling to compensate for the alignment error between the bearing housing and the dynamometer. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is an exploded view of the transmission device;

[0022] As shown in the figure:

[0023] Detailed Implementation

[0024] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0025] This application compensates for alignment using a splined shaft 1 and a diaphragm coupling 6; the small-diameter splined shaft 1 reduces rotational inertia and unbalanced mass, making the shaft system more stable during high-speed rotation and generating less vibration excitation; by installing the torque sensor 4 between the test piece and the bearing housing 5, inaccurate torque measurement caused by the test motor being too far from the torque sensor 4 is avoided; and the oil-air lubrication and water cooling of the bearing housing ensures that the bearing housing can meet the requirements of high-speed applications and also avoids damage to the bearing due to excessive bearing temperature.

[0026] Specifically, such as Figure 1 As shown, this embodiment includes: a splined shaft 1, a retaining ring 2, an inner splined flange 3, a torque sensor 4, a bearing housing 5, and a diaphragm coupling 6. One end of the splined shaft 1 is connected to the output shaft of a high-speed motor, and the other end is connected to the inner splined flange 3. The splined shaft 1 is mounted on the side of the inner splined flange 3 facing away from the bearing housing 5 via the retaining ring 2. The inner splined flange 3 is connected to the bearing housing 5 via the torque sensor 4, and the bearing housing 5 is connected to a dynamometer via the diaphragm coupling 6.

[0027] Splined shaft 1 is a double-splined shaft with splines at both ends. The diameter of the splined portions at both ends of splined shaft 1 is larger than the diameter of the middle portion. The retaining ring 2 is a ring-shaped structure formed by two semi-circular rings. The retaining ring 2 is fitted around the middle portion of splined shaft 1, allowing for a certain amount of axial movement. The diameter of the splined portion of splined shaft 1 is larger than the inner ring diameter of retaining ring 2. A certain clearance is maintained between the spline and retaining ring 2 to compensate for misalignment. Because the spline diameter is relatively small (≤35mm), it can reduce rotational inertia and unbalanced mass.

[0028] A locking pin 7 is installed on the bearing housing 5, allowing the rotation of the bearing housing 5 shaft to be locked radially by the locking pin 7. The shaft of the bearing housing 5 has a corresponding pin hole; the locking pin is inserted into the pin hole to lock the shaft relative to the bearing housing 5, facilitating shaft installation and preventing the shaft from rotating when tightening screws. Simultaneously, this locking pin can be used to lock the shaft and torque sensor 4 during calibration.

[0029] In one embodiment, the bearing housing 5 is an oil-air lubricated bearing housing and is equipped with water channels for water cooling, thereby extending the service life of the bearing housing 5 and meeting the application requirements of high speeds up to 25,000 rpm.

[0030] In one embodiment, the diaphragm coupling 6 comprises two sets of diaphragms connected in series. The diaphragm coupling 6 is a known device that uses elastic steel sheets to transmit rotational motion and torque. The steel sheets have good elasticity and can withstand a certain degree of deformation, which can compensate for misalignment. The maximum allowable deformation of each set of diaphragms is a fixed value, so the allowable deformation of the two sets of diaphragms is equivalent to twice that of a single set. Therefore, the two sets of diaphragms have a greater ability to compensate for misalignment.

[0031] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0032] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A transmission device for a high-speed motor test bench for new energy vehicles, characterized in that, include: Splined shaft (1), internal splined flange (3), torque sensor (4), bearing housing (5), and diaphragm coupling (6); One end of the splined shaft (1) is connected to the output shaft of the high-speed motor, and the other end is connected to the inner splined flange (3). The inner splined flange (3) is connected to the bearing housing (5) through the torque sensor (4). The bearing housing (5) is connected to the dynamometer through the diaphragm coupling (6).

2. The transmission device for the high-speed motor test bench of new energy vehicles according to claim 1, characterized in that: The spline shaft (1) is mounted on the side of the inner spline flange (3) facing away from the bearing seat (5) via a retaining ring (2).

3. The transmission device for the high-speed motor test bench of new energy vehicles according to claim 1, characterized in that: The bearing housing (5) is an oil-air lubricated bearing housing and is equipped with water channels for water cooling.

4. The transmission device for the high-speed motor test bench of new energy vehicles according to claim 1, characterized in that: The diaphragm coupling (6) is provided with two sets of diaphragms connected in series.

5. The transmission device for the high-speed motor test bench of new energy vehicles according to claim 2, characterized in that: The spline shaft (1) is a double spline shaft with splines at both ends, and the diameter of the spline portion at both ends of the spline shaft (1) is larger than the diameter of the middle portion.

6. The transmission device for the high-speed motor test bench of new energy vehicles according to claim 1, characterized in that: The bearing housing (5) is equipped with a locking pin (7) which allows the rotation of the bearing housing (5) shaft to be radially locked by the locking pin (7).

7. The transmission device for the high-speed motor test bench of new energy vehicles according to claim 5, characterized in that: The retaining ring (2) is a ring structure formed by two semi-circular rings, and the retaining ring (2) is fitted around the middle part of the spline shaft (1).

8. The transmission device for the high-speed motor test bench of new energy vehicles according to claim 5, characterized in that: The diameter of the spline portion of the spline shaft (1) is larger than the inner ring diameter of the retaining ring (2).

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