CN216351100U

CN216351100U - Motor function testing device

Info

Publication number: CN216351100U
Application number: CN202121550973.4U
Authority: CN
Inventors: 毕丛楠
Original assignee: Amte Shanghai New Energy Technology Co ltd
Current assignee: Amte Shanghai New Energy Technology Co ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2022-04-19
Anticipated expiration: 2031-07-08

Abstract

The utility model belongs to the technical field of motor testing, and provides a motor function testing device, which comprises: a torque measuring device for measuring a torque acting on an output shaft of the motor; one end of the first coupling is connected with the output shaft of the motor, and the other opposite end of the first coupling is connected with the input end of the torque measuring device; a magnetic particle brake for providing a load required for testing; and one end of the second coupler is connected with the output end of the torque measuring device, and the other opposite end of the second coupler is connected with the magnetic powder brake. The utility model can reduce the control difficulty of the load and reduce the cost required by the test.

Description

Motor function testing device

Technical Field

The utility model belongs to the technical field of motor testing, and particularly relates to a motor function testing device.

Background

In order to ensure that the motor can meet the use requirements, the function of the motor is often required to be tested. Because the function of the motor is tested by detecting the performance indexes of the motor, such as torque, rotating speed, power and the like, the motor simulation load is often adopted to carry out the drag test. However, when a test scene with low rotating speed, high torque and linear change is involved, the motor control difficulty for simulating the load is high, and the cost of the motor meeting the requirements is high, so that the problems of difficult motor function test and high test cost are caused.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a motor function testing device to solve the technical problems of high load control difficulty and high testing cost in the existing motor function testing mode.

The technical scheme adopted by the utility model is as follows:

in a first aspect, the present invention provides a motor function testing apparatus, including:

a torque measuring device for measuring a torque acting on an output shaft of the motor;

one end of the first coupling is connected with the output shaft of the motor, and the other opposite end of the first coupling is connected with the input end of the torque measuring device;

a magnetic particle brake for providing a load required for testing;

and one end of the second coupler is connected with the output end of the torque measuring device, and the other opposite end of the second coupler is connected with the magnetic powder brake.

Preferably, the torque measuring device is also used for measuring the rotating speed of the output shaft of the motor.

Preferably, the motor function testing device further comprises a bearing seat and a bearing, wherein a mounting hole is formed in the bearing seat shaft, an outer ring of the bearing is installed in a matched mode with the inner wall of the mounting hole, an inner ring of the bearing is used for being connected with the outer wall of the motor output shaft, and the inner ring of the bearing can rotate relative to the outer ring of the bearing.

Preferably, the bearing frame includes mounting panel, backup pad and fixed plate, the mounting panel is used for the installation the bearing, the backup pad respectively with the fixed plate with the mounting panel is perpendicular, the both ends of backup pad link to each other with mounting panel and fixed plate respectively, the bottom of mounting panel with the fixed plate links to each other.

Preferably, the number of the support plates is two, the two support plates are symmetrically arranged about the axis of the bearing, and the cross-sectional area of each support plate is gradually increased from one end close to the bearing to one end far away from the bearing.

Preferably, the motor function testing device further comprises a supporting seat, wherein the supporting seat is used for supporting the torque measuring device from one side of the radial direction of the torque measuring device; in the axial direction of the bearing, the support seat is located between the bearing seat and the magnetic powder brake.

Preferably, the supporting seat includes first supporting part and second supporting part, first supporting part be located the second supporting part with between the moment of torsion detection device, first supporting part dorsad the one end of second supporting part is provided with curved butt face, the butt face with the butt of moment of torsion measuring device.

Preferably, the cross-sectional area of the second support portion gradually increases from an end close to the first support portion toward an end far from the first support portion.

Preferably, the second support portion is provided with a through hole penetrating through the second support portion in an axial direction of the bearing, and a cross-sectional area of the through hole is gradually increased from one end close to the first support portion toward one end far away from the first support portion.

Preferably, the motor function testing device further comprises a base, and the bearing seat, the supporting seat and the magnetic powder brake are fixed on the base.

Has the advantages that: according to the motor function testing device, one end of the torque measuring device is connected with the output shaft of the motor through the first coupler, and the other end of the torque measuring device is connected with the magnetic powder brake through the second coupler, so that the magnetic powder brake is used as a load during motor function testing. Because the linearity of the magnetic powder controller is good, the torque control to the output is simple, and the cost is low, so the motor function testing device of the application is simple to control, and the cost of the motor function test can be obviously reduced on the premise of ensuring the accuracy of the test.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, without any creative effort, other drawings may be obtained according to the drawings, and these drawings are all within the protection scope of the present invention.

FIG. 1 is a three-dimensional structure diagram of a motor function testing device according to the present invention

FIG. 2 is a front view of the motor function testing apparatus of the present invention;

FIG. 3 is a top view of the motor function testing apparatus of the present invention;

FIG. 4 is a schematic view of the construction of the bearing housing portion of the present invention;

FIG. 5 is a schematic structural view of a support base portion of the present invention.

Description of reference numerals:

the torque measuring device 10, the magnetic powder brake 20, the first coupling 30, the second coupling 40, the bearing seat 50, the mounting plate 51, the support plate 52, the fixing plate 53, the bearing 60, the support seat 70, the first support part 71, the first sub-part 711, the abutting surface 7111, the second sub-part 712, the second support part 72, the through hole 721 and the base 80.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In case of conflict, the embodiments of the present invention and the various features of the embodiments may be combined with each other within the scope of the present invention.

Example 1

As shown in fig. 1 to 3, the present embodiment provides a motor function testing apparatus including a torque measuring device 10, a first coupling 30, a magnetic particle brake 20, and a second coupling 40.

Wherein the torque measuring device 10 is used for measuring the torque acting on the output shaft of the motor; the torque measuring device 10 may employ a torque sensor.

One end of the first coupler 30 is connected with the output shaft of the motor, and the other opposite end is connected with the input end of the torque measuring device 10;

wherein the torque measuring device 10 may employ a torque sensor. In order to detect the torque output by the motor, the output shaft of the motor is in transmission connection with the input end of the torque sensor through the first coupler 30, so that the power output by the motor can be transmitted to the torque sensor.

Wherein the magnetic particle brake 20 is used to provide the load required for testing;

the magnetic powder brake 20 is mainly composed of a driving rotor, a driven rotor and a magnetic yoke containing an exciting coil. The driving rotor, the driven rotor and the magnetic yoke are assembled in a relatively concentric mode to form a whole body capable of rotating relatively. Alloy magnetic powder with high magnetic permeability is filled in an annular gap between the driving rotor and the driven rotor. When no current flows through the exciting coil, the magnetic powder in the working cavity is in a loose state. Under the action of the centrifugal force generated by the driving rotor, the magnetic powder is uniformly thrown on the inner wall of the driving rotor, the driving rotor and the driven rotor are in a separated state due to the force-free interaction, and no torque is transmitted. When current passes through the exciting coil, working magnetic flux is generated in the magnetic yoke, magnetic powder in the working cavity is connected in a chain shape along the magnetic flux direction to form a magnetic powder chain, the magnetic powder brake 20 transfers torque by means of the friction force between the magnetic powder and the magnetic powder, between the magnetic powder and the working surface and the shearing resistance between the magnetic powder chains, and the magnetic powder brake 20 is in a combined state. When the current is cut off, the magnetic flux disappears along with the disappearance of the exciting current, the magnetic powder is in a loose state again under the action of gravity and is thrown on the inner wall of the driving rotor under the action of centrifugal force, and the magnetic powder brake 20 is in a separated state again. Because the torque transmitted between the driving rotor and the driven rotor is in a linear relation with the exciting current substrate, the torque transmitted between the driving rotor and the driven rotor can be accurately controlled by controlling the current of the exciting coil, so that the magnetic powder brake 20 is adopted as the load of the motor function testing device in the embodiment, the loaded torque can be simply and conveniently controlled, the control difficulty is small, and in addition, the magnetic powder brake 20 is lower than the motor cost, so the motor function testing device can also obviously reduce the cost. The method for increasing the control current to control the torque transmitted by the magnetic particle brake 20 may be implemented by the prior art, and will not be described herein.

And one end of the second coupling 40 is connected with the output end of the torque measuring device 10, and the other opposite end is connected with the magnetic powder brake 20.

The motor function testing apparatus of the present embodiment uses the second coupling 40 to form a driving connection between the output end of the torque measuring apparatus 10 and the magnetic particle brake 20, so that the load generated by the magnetic particle brake 20 can be applied to the motor under test through the torque measuring apparatus 10.

As a preferable mode, the torque measuring device 10 used in the present embodiment can measure not only the torque but also the rotation speed of the output shaft of the motor. Therefore, power conversion can be carried out according to the measured torque and the measured rotating speed, so that the motor function testing device of the embodiment can test the motor function more perfectly.

As shown in fig. 1 and 4, in this embodiment, the motor function testing apparatus further includes a bearing seat 50 and a bearing 60, a mounting hole is provided on a shaft of the bearing 60, an outer ring of the bearing 60 is mounted in cooperation with an inner wall of the mounting hole, an inner ring of the bearing 60 is used for being connected with an outer wall of an output shaft of the motor, and the inner ring of the bearing 60 can rotate relative to the outer ring of the bearing 60.

Wherein, the outer ring of the bearing 60 can be installed in a way of interference fit with the installation hole, and the inner ring of the bearing 60 can also be installed in a way of interference fit with the output shaft of the motor. When installed in the foregoing manner, the bearing seat 50 and the bearing 60 can provide reliable support for the motor output shaft, and at the same time, the motor output shaft can rotate freely during testing.

As shown in fig. 4, in order to provide reliable support for the bearing 60, in the present embodiment, the bearing seat 50 includes a mounting plate 51, a supporting plate 52 and a fixing plate 53, the mounting plate 51 is used for mounting the bearing 60, the supporting plate 52 is perpendicular to the fixing plate 53 and the mounting plate 51, the fixing plate 53 is perpendicular to the mounting plate 51, two ends of the supporting plate 52 are connected to the mounting plate 51 and the fixing plate 53, respectively, and the bottom of the mounting plate 51 is connected to the fixing plate 53.

In the present embodiment, the mounting plate 51 is used as a main component for mounting the bearing 60, and the support plate 52 forms a support for the mounting plate 51, so that the mounting plate 51 can maintain a good rigidity, thereby ensuring a stable position of the bearing 60 during testing. In order to further improve the stability of the mounting plate 51, the fixing plate 53 is further added on the basis of the supporting plate 52 in the embodiment, and the supporting plate 52, the fixing plate 53 and the mounting plate 51 are mutually perpendicular to form a stable right-angled triangle connecting structure, so that the whole structure of the bearing seat 50 formed by the three is more stable, and the position of the bearing 60 can be kept stable during testing. In addition, since the supporting plate 52, the fixing plate 53 and the mounting plate 51 can adopt a plate-shaped structure, the motor function testing device in the embodiment can save materials and reduce the overall weight of the device.

In this embodiment, as a preferred embodiment, the support plate 52 is two, the two support plates 52 are symmetrically arranged about the axis of the bearing 60, and the cross-sectional area of the support plate 52 gradually increases from the end close to the bearing 60 to the end far from the bearing 60.

The present embodiment adopts a mode that two supporting plates 52 are symmetrically arranged. The two support plates 52 respectively support the mounting plate 51 at two sides of the axis of the bearing 60, so that the stress of the bearing seat 50 can be dispersed, and the support plates 52 can be prevented from generating overlarge deformation due to uneven stress. In addition, the support plate 52 of the present embodiment adopts a shape with a smaller end and a larger end, so that the size of the end of the bearing seat 50 far away from the bearing 60 is larger, the structure near the connecting position of the support plate 52 and the fixing plate 53 is more stable, and the stability of the whole structure of the bearing seat 50 can be improved.

Example 2

As shown in fig. 1, this embodiment is further improved on the basis of embodiment 1, in this embodiment, the motor function testing apparatus further includes a support seat 70, and the support seat 70 is used for supporting the torque measuring apparatus 10 from one side of the torque measuring apparatus 10 in the radial direction; the support seat 70 is located between the bearing housing 50 and the magnetic particle brake 20 in the axial direction of the bearing 60.

Since the middle portion does not have reliable support although both ends of the motor function testing apparatus are supported by the bearing housing 50 and the magnetic particle brake 20, respectively, the stability of the portion is poor during the testing process. The middle part is the position of the torque measuring device 10, so that the accuracy of the motor test is easily influenced. For this, the present embodiment provides a support base 70 between the support base and the magnetic particle brake 20 to support the torque measuring device 10. The support seat 70 is located between the bearing seat 50 and the magnetic particle brake 20 in the axial direction and on the same side of the bearing 60 as the bearing seat 50 in the radial direction. In this embodiment, after the supporting seat 70 is added on the basis of embodiment 1, three-point support is formed for the motor function testing device, and two end portions and a middle portion of the motor function testing device are respectively supported, so that the overall deflection and the deflection of the middle position of the motor function testing device are greatly reduced. Meanwhile, the support shaft supports the torque measuring device 10 at the middle position, so that the position of the torque measuring device 10 is kept stable in the test process, and the test accuracy is further improved.

As shown in fig. 5, in the present embodiment, the support seat 70 includes a first support portion 71 and a second support portion 72, the first support portion 71 is located between the second support portion 72 and the torque detection device, an end of the first support portion 71 facing away from the second support portion 72 is provided with an arc-shaped abutting surface 7111, and the abutting surface 7111 abuts against the torque measurement device 10.

This embodiment will the supporting seat 70 divide into first supporting part 71 and second supporting part 72 two parts, and wherein first supporting part 71 mainly plays the effect that stabilizes the support, and second supporting part 72 then mainly plays and laminates with torque detection device, carries out spacing effect to torque detection device. For increasing the area of contact of first supporting portion 71 and torque detection device, increase the limiting displacement of first supporting portion 71 to torque detection device, this embodiment is provided with curved butt face 7111 at first supporting portion 71 towards torque detection device's one end, and this butt face 7111 can fully contact with torque detection device's shell to the shell of partial parcel torque detection device to increase the limiting displacement of first supporting portion 71 to torque detection device. In a preferred embodiment, the first support portion 71 comprises a first sub-portion on which the aforementioned arc-shaped abutment face 7111 is disposed, and a second sub-portion 712, one end of which is connected to the first sub-portion and the opposite end is connected to the second support portion 72. The embodiment divides the first supporting portion 71 into the first sub-portion and the second sub-portion 712 such that the shape of the first supporting portion 71 matches the shape of the second supporting portion 72, and the shape of the torque detecting device matches the shape of the torque detecting device. This also facilitates machining of the curved abutment face 7111 on the first sub-portion, which matches the external shape of the torque detection device.

As a preferable embodiment, in the present embodiment, the cross-sectional area of the second support part 72 gradually increases from one end close to the first support part 71 to one end far from the first support part 71. In addition, the second supporting portion 72 of the present embodiment adopts a shape with a smaller end and a larger end, so that the end of the supporting seat 70 far away from the torque measuring device 10 has a larger size to better bear the moment at the bottom of the supporting seat 70, thereby improving the stability of the whole structure of the supporting seat 70.

Further, as a preferable embodiment, in the present embodiment, the second support portion 72 is provided with a through hole 721 penetrating the second support portion 72 in the axial direction of the bearing 60, and the cross-sectional area of the through hole 721 is gradually increased from one end close to the first support portion 71 to one end far from the first support portion 71.

The present embodiment forms the second support portion 72 into a hollow frame structure by using the through hole 721 penetrating the second support portion 72 in the axial direction of the bearing 60, so as to reduce the required material of the structure and the overall weight of the structure to some extent while maintaining the structural stability. The cross-sectional area of the through-hole 721 also gradually increases from the end close to the first support portion 71 toward the end away from the first support portion 71, i.e., is consistent with the main body of the second support portion 72, so that the thickness of the substrate at each position of the second support portion 72 can be maintained uniform.

Example 3

As shown in fig. 1, this embodiment is further improved on the basis of embodiment 2, in this embodiment, the motor function testing apparatus further includes a base 80, and the bearing seat 50, the supporting seat 70 and the magnetic powder brake 20 are fixed on the base 80. In order to keep the positions of the motor output shaft, the torque measuring device 10 and the magnetic powder brake 20 relatively stable, the base 80 is further provided in the embodiment, and the bearing seat 50, the support seat 70 and the magnetic powder brake 20 are all fixed on the same base 80, so that the relative positions of the three are also fixed. Meanwhile, in order to improve the accuracy of the test, the base 80 in the embodiment may also adopt a damping base 80, so that the vibration during the motor test can be eliminated, and the accuracy of the test is further improved.

In addition, the motor function testing apparatus of the present embodiment further includes a power supply for supplying power to the magnetic particle brake 20 and/or a controller for controlling the magnitude of current flowing through the exciting coil of the magnetic particle brake 20. The power supply and/or the controller may be integrated with the motor function testing device of the present embodiment, or only a corresponding interface may be reserved in the motor function testing device, and the power supply and/or the controller may be provided externally. The control Circuit may be a Processor, such as a Central Processing Unit (CPU), other general-purpose Processor, a single-chip microcomputer, an ARM, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Motor function test device, its characterized in that includes:

a magnetic particle brake for providing a load required for testing;

one end of the second coupler is connected with the output end of the torque measuring device, and the other opposite end of the second coupler is connected with the magnetic powder brake;

the motor function testing device further comprises a bearing seat and a bearing, wherein the bearing seat is provided with a mounting hole, an outer ring of the bearing is installed in a matched mode with the inner wall of the mounting hole, an inner ring of the bearing is used for being connected with the outer wall of the motor output shaft, and the inner ring of the bearing can rotate relative to the outer ring of the bearing.

2. A motor function testing device according to claim 1, wherein said torque measuring means is further adapted to measure the rotational speed of the motor output shaft.

3. The motor function testing device of claim 1, wherein the bearing seat comprises a mounting plate, a supporting plate and a fixing plate, the mounting plate is used for mounting the bearing, the supporting plate is respectively perpendicular to the fixing plate and the mounting plate, the fixing plate is perpendicular to the mounting plate, two ends of the supporting plate are respectively connected with the mounting plate and the fixing plate, and the bottom of the mounting plate is connected with the fixing plate.

4. The motor function testing device of claim 3, wherein the supporting plates are two, the two supporting plates are symmetrically arranged about the axis of the bearing, and the cross-sectional area of the supporting plates is gradually increased from one end close to the bearing to one end far away from the bearing.

5. The motor function test device of claim 2, further comprising a support base for supporting the torque measuring device from one side in a radial direction of the torque measuring device; in the axial direction of the bearing, the support seat is located between the bearing seat and the magnetic powder brake.

6. The motor function testing device of claim 5, wherein the supporting seat comprises a first supporting portion and a second supporting portion, the first supporting portion is located between the second supporting portion and the torque measuring device, an arc-shaped abutting surface is arranged at one end of the first supporting portion, which faces away from the second supporting portion, and the abutting surface abuts against the torque measuring device.

7. The motor function test device of claim 6, wherein the cross-sectional area of the second support portion gradually increases from an end close to the first support portion toward an end far from the first support portion.

8. The motor function test device of claim 7, wherein the second support portion is provided with a through hole penetrating through the second support portion in an axial direction of the bearing, and a cross-sectional area of the through hole gradually increases from an end close to the first support portion toward an end far from the first support portion.

9. The motor function testing device of claim 5, further comprising a base, wherein the bearing seat, the support seat and the magnetic powder brake are fixed on the base.