Motor shaft voltage testing device
By designing a motor shaft voltage test device with preset angles, the problem of poor testing results caused by the large limitations of testing in the prior art is solved, and a more comprehensive and efficient motor shaft voltage test is achieved.
Patent Information
- Application Number
- CN202421857195.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-01
AI Technical Summary
The existing motor shaft voltage test devices have great testing limitations, resulting in poor testing results.
A motor shaft voltage testing device including a base, a first connector and a second connector is designed. The first preset axis is parallel to the axis direction of the motor to be tested, and there is a preset angle between the first preset axis and the second preset axis to realize the angle and position adjustment of the test carbon brush.
By increasing the movable range and angle adjustment ability of the test carbon brush, a more comprehensive test of the motor shaft is achieved and the test effect is improved.
Smart Images
Figure CN222979686U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor detection, and more specifically, to a device for testing the shaft voltage of a motor. Background Art
[0002] The shaft voltage of a motor refers to the voltage generated between the bearings at both ends of the motor or between the motor shaft and the bearings when the motor is running. When the shaft voltage is too high, it will break through the oil film and then form a loop for the shaft current to generate. The shaft current will affect the stability of the oil film, and when the shaft current passes through the contact point between the bearing and the shaft, it will generate high temperature instantly, which will cause local damage to the bearing. In order to avoid the above situation, it is necessary to test the shaft voltage of the motor.
[0003] In the related art, the shaft voltage is tested by a testing device. The testing device includes a fixing frame and a carbon brush arranged on the fixing frame. The carbon brush can move in the vertical direction to test the shaft voltage. However, due to the fixed moving direction of the carbon brush, the testing device can only test the motor shaft in one direction, resulting in a large limitation in the testing of the testing device and poor testing effect. Summary of the Utility Model
[0004] The main purpose of the utility model is to provide a device for testing the shaft voltage of a motor, so as to solve the problem of poor testing effect caused by the large limitation of the device for testing the shaft voltage of a motor in the related art.
[0005] To achieve the above purpose, the utility model provides a device for testing the shaft voltage of a motor, including: a base; a first connecting member, which is arranged on the base in a position-adjustable manner around a first preset axis; a second connecting member, which is rotatably connected to the first connecting member around a second preset axis, and the second connecting member is used to fix a testing carbon brush; wherein, the first preset axis is parallel to the axis direction of the motor to be tested, and there is a preset included angle between the first preset axis and the second preset axis.
[0006] Furthermore, the second connecting member includes a connecting rod and a clamping portion. The clamping portion is arranged on the connecting rod. An installation hole is arranged on the first connecting member, and the connecting rod passes through the installation hole and can rotate and move in the installation hole.
[0007] Furthermore, the device for testing the shaft voltage of a motor further includes a first locking member, which is arranged between the first connecting member and the connecting rod and is used to lock the position of the connecting rod.
[0008] Furthermore, the first connecting member includes a connecting ring, and the installation hole is arranged on the connecting ring. The connecting ring can rotate relative to the base and can move away from or close to the base.
[0009] Further, the motor shaft voltage testing device further includes a second locking member, which is disposed between the first connecting member and the base and is used to lock the position of the first connecting member.
[0010] Further, the base includes a body portion and an annular portion disposed on the body portion, and the first connecting member is nested and fitted with the annular portion.
[0011] Further, the motor shaft voltage testing device further includes a sealing cover, which covers the first connecting member and the second connecting member and is connected to the base.
[0012] Further, the sealing cover includes a cover body and an outward convex edge connected to the cover body, and the outward convex edge is connected to the base.
[0013] Further, an arc-shaped groove is provided on the outward convex edge, and the motor shaft voltage testing device further includes a fastener, which is inserted into the arc-shaped groove and connected to the base.
[0014] Further, a first sealant is provided between the outward convex edge and the base.
[0015] Further, a communication hole is provided on the sealing cover, a plug is provided in the communication hole, and a second sealant is provided between the plug and the communication hole.
[0016] Applying the technical solution of the present utility model, the first connecting member is adjustably disposed on the base around a first preset axis, and the second connecting member is rotatably connected to the first connecting member around a second preset axis. The test carbon brush is fixed to the second connecting member. Through the above settings, since there is a preset included angle between the first preset axis and the second preset axis, the movement directions of the first connecting member and the second connecting member are different, so that the movable range of the test carbon brush is larger. At the same time, under the action of the first connecting member and the second connecting member, the adjustment of the angle and position of the test carbon brush can be realized, so that the test carbon brush can contact the motor shaft at different angles and perform tests, and the test carbon brush can also contact different positions of the motor shaft and perform tests. In this way, the test positions are more comprehensive, and the test effect can be guaranteed. Therefore, the technical solution of the present application effectively solves the problem that the limitation of the motor shaft voltage testing device in the related art is large and the test effect is poor. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:
[0018] Figure 1 Shows a three-dimensional structural schematic diagram of an embodiment of the motor shaft voltage testing device according to the present utility model;
[0019] Figure 2 shows Figure 1 an exploded structural schematic diagram of a motor shaft voltage testing device;
[0020] Figure 3 shows Figure 1 a top view schematic diagram of a motor shaft voltage testing device;
[0021] Figure 4 shows Figure 1 a three - dimensional structural schematic diagram of a base, a first connecting member, and a second connecting member of a motor shaft voltage testing device;
[0022] Figure 5 shows Figure 4 a three - dimensional structural schematic diagram of the second connecting member;
[0023] Figure 6 shows Figure 2 a three - dimensional structural schematic diagram of a sealing cover;
[0024] Figure 7 shows Figure 6 a sectional view schematic diagram of the sealing cover.
[0025] Among them, the above - mentioned drawings include the following reference numerals:
[0026] 10, base; 11, body part; 12, annular part; 20, first connecting member; 21, mounting hole; 22, connecting ring; 30, second connecting member; 31, connecting rod; 32, clamping part; 40, sealing cover; 41, cover body; 42, outer convex edge; 421, arc groove; 43, communication hole. Detailed implementation manners
[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restrictive of the present utility model and its application or use. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.
[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0029] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.
[0030] As Figure 1 , Figure 2 and Figure 4 shown, in this embodiment, the motor shaft voltage testing device includes: a base 10, a first connecting member 20, and a second connecting member 30. The first connecting member 20 is adjustably disposed on the base 10 around a first preset axis position. The second connecting member 30 is rotatably connected to the first connecting member 20 around a second preset axis, and the second connecting member 30 is used to fix the test carbon brush. Wherein, the first preset axis is parallel to the axis direction of the motor to be tested, and there is a preset included angle between the first preset axis and the second preset axis.
[0031] Applying the technical solution of this embodiment, the first connecting member 20 is adjustably disposed on the base 10 around a first preset axis, and the second connecting member 30 is rotatably connected to the first connecting member 20 around a second preset axis. The test carbon brush is fixed to the second connecting member 30. With the above arrangement, since there is a preset angle between the first preset axis and the second preset axis, the movement directions of the first connecting member 20 and the second connecting member 30 are different, so that the movable range of the test carbon brush is larger. At the same time, under the action of the first connecting member 20 and the second connecting member 30, the adjustment of the angle and position of the test carbon brush can be realized. Thus, the test carbon brush can contact the motor shaft at different angles for testing, and the test carbon brush can also contact different positions of the motor shaft for testing. In this way, the test positions are more comprehensive, and the test effect can be guaranteed. Therefore, the technical solution of this embodiment effectively solves the problem that the limitation of the motor shaft voltage testing device in the related art is large, resulting in poor test effect.
[0032] Specifically, in this embodiment, the angle between the first preset axis and the second preset axis is 90°. Of course, in an embodiment not shown in the figure, the angle between the first preset axis and the second preset axis can also be other angles, such as 45°, 60°, 120°, 150°, etc.
[0033] In this embodiment, the base 10 is fixed to the end cover of the motor to be tested.
[0034] As Figure 2 、 Figure 4 and Figure 5 shown, in this embodiment, the second connecting member 30 includes a connecting rod 31 and a clamping portion 32. The clamping portion 32 is disposed on the connecting rod 31. An installation hole 21 is provided on the first connecting member 20. The connecting rod 31 passes through the installation hole 21 and can rotate and move in the installation hole 21. The clamping portion 32 can clamp the test carbon brush, so that the position of the test carbon brush is more stable. The structure of the connecting rod 31 is simple. The connecting rod 31 can rotate or move in the installation hole 21, so that the position of the test carbon brush can be adjusted, and thus the test carbon brush can contact different positions of the motor shaft at different angles.
[0035] Specifically, in this embodiment, the clamping portion 32 includes a first clamping arm and a second clamping arm. The first end of the first clamping arm is connected to the first end of the second clamping arm. There is a gap between the second end of the first clamping arm and the second end of the second clamping arm. A screw is connected between the second end of the first clamping arm and the second end of the second clamping arm. The first clamping arm and the second clamping arm can clamp the test carbon brush.
[0036] In an embodiment not shown in the figure, the clamping portion 32 includes a clamping block, and a clamping hole is provided on the clamping block, and the test carbon brush is inserted into the clamping hole. Of course, the clamping portion 32 can also be other structures as long as it can fix the test carbon brush.
[0037] As Figure 2 and Figure 4 shown, in this embodiment, the motor shaft voltage testing device further includes a first locking member, and the first locking member is arranged between the first connecting member 20 and the connecting rod 31 and is used to lock the position of the connecting rod 31. The first locking member can lock the connecting rod 31, thereby making the position of the connecting rod 31 more stable. Specifically, the first locking member is a first locking screw.
[0038] As Figure 2 and Figure 4 shown, in this embodiment, a convex block is provided on the first connecting member 20, the mounting hole 21 is provided on the convex block, a first locking hole is provided on the side of the convex block, the first locking hole communicates with the mounting hole 21, and the first locking screw is inserted into the first locking hole and can abut against the connecting rod 31 located in the mounting hole 21, thereby limiting the connecting rod 31, so that the connecting rod 31 can be kept at a fixed angle and position.
[0039] As Figure 2 and Figure 4 shown, in this embodiment, the first connecting member 20 includes a connecting ring 22, the mounting hole 21 is provided on the connecting ring 22, the connecting ring 22 can rotate relative to the base 10 and can move away from or close to the base 10. The structure of the connecting ring 22 is simple and convenient to arrange. The connecting ring 22 can be sleeved on the outer periphery of the motor shaft of the motor to be tested. The connecting ring 22 can move close to or away from the base 10, so that the motor shaft voltage testing device can adapt to motor shafts of different sizes and can test more positions on the motor shaft.
[0040] As Figure 2 and Figure 4 shown, in this embodiment, the motor shaft voltage testing device further includes a second locking member, and the second locking member is arranged between the first connecting member 20 and the base 10 and is used to lock the position of the first connecting member 20. The second locking member can lock the position between the base 10 and the first connecting member 20. Specifically, the second locking member is a second locking screw.
[0041] In this embodiment, there are a plurality of second locking members, and the plurality of second locking members are arranged at intervals along the circumferential direction of the connecting ring.
[0042] As Figures 1 to 4As shown, in this embodiment, the base 10 includes a body portion 11 and an annular portion 12 provided on the body portion 11. The first connecting member 20 is nested and fitted with the annular portion 12. The nested fit between the first connecting member 20 and the annular portion 12 makes the movement and rotation of the first connecting member 20 relatively stable. A second locking hole is provided on the connecting ring 22, and a second locking screw is inserted into the second locking hole and abuts against the annular portion 12 to lock the position of the connecting ring 22.
[0043] In an embodiment not shown in the figure, the base only includes the body portion. The connecting ring can be telescopic. An annular groove is provided on the body portion. The connecting ring is inserted into the annular groove and can rotate in the annular groove. Specifically, in order to prevent the connecting ring from disengaging from the annular groove, a limiting member is provided between the annular groove and the connecting ring.
[0044] As Figures 1 to 3 and Figure 6 and Figure 7 As shown, in this embodiment, the motor shaft voltage testing device further includes a sealing cover 40. The sealing cover 40 covers the first connecting member 20 and the second connecting member 30 and is connected to the base 10. The provision of the sealing cover 40 can protect the motor shaft voltage testing position and prevent other foreign objects from affecting the test.
[0045] As Figures 1 to 3 and Figure 6 and Figure 7 As shown, in this embodiment, the sealing cover 40 includes a cover body 41 and an outward convex edge 42 connected to the cover body 41. The outward convex edge 42 is connected to the base 10. The contact area between the outward convex edge 42 and the base 10 is relatively large, so that the connection between the sealing cover 40 and the base 10 can be more stable.
[0046] Specifically, as Figures 1 to 3 and Figure 6 and Figure 7 As shown, an outward convex avoidance portion is provided on the cover body 41. The outward convex avoidance portion can avoid the second connecting member 30, that is, when the second connecting member 30 moves in the mounting hole 21, it will not interfere with the outward convex avoidance portion. The outward convex avoidance portion includes a first vertical plate, a second vertical plate, a third vertical plate, a first end plate and a second end plate. An opening portion is provided on the cover body 41. The first vertical plate and the second vertical plate are connected to both sides of the opening portion. The third vertical plate is connected between the first vertical plate and the second vertical plate. The first end plate is connected between the first end of the first vertical plate, the first end of the second vertical plate, the first end of the third vertical plate and the cover body 41. The second end plate is connected between the second end of the first vertical plate, the second end of the second vertical plate and the second end of the third vertical plate. A notch portion is provided on the side of the second end plate facing the cover body 41. The notch portion can avoid the second connecting member 30 and make it easier for the sealing cover to be inserted onto the first connecting member 20 and the second connecting member 30.
[0047] As Figures 1 to 3 and Figure 6 and Figure 7 shown, in this embodiment, an arc-shaped groove 421 is provided on the outward convex edge 42. The motor shaft voltage testing device further includes a fastener which is disposed through the arc-shaped groove 421 and connected to the base 10. A locking hole corresponding to the arc-shaped groove 421 is provided on the base 10. The fastener passes through the arc-shaped groove 421 and is connected to the locking hole. Meanwhile, due to the provision of the arc-shaped groove 421, the sealing cover 40 can still be connected to the base 10 after rotating a certain angle.
[0048] In this embodiment, both the arc-shaped grooves 421 and the fasteners are multiple, and each arc-shaped groove 421 corresponds to at least one fastener.
[0049] As Figures 1 to 3 and Figure 6 and Figure 7 shown, in this embodiment, a first sealant is provided between the outward convex edge 42 and the base 10. The provision of the first sealant can further improve the sealing effect.
[0050] As Figures 1 to 3 and Figure 6 and Figure 7 shown, in this embodiment, a communication hole 43 is provided on the sealing cover 40. A plug is provided in the communication hole 43, and a second sealant is provided between the plug and the communication hole 43. The provision of the communication hole 43 can allow the wire for testing the carbon brush to pass through. The plug can block the communication hole 43 and, under the action of the second sealant, can make the sealing effect at the communication hole 43 better.
[0051] The usage process of the motor shaft voltage testing device is as follows:
[0052] During the experiment, first, a hole is drilled at the corresponding position on the observation window end plate of the motor to be tested (this end plate can be separately reserved for all shaft voltage testing experiments of this project). Then, the base 10 is installed on the end plate, and a sealant is applied between the base 10 and the end plate. Finally, screws are used for fixation.
[0053] The test carbon brush is fixed through the clamping portion 32, and then the second connecting member 30 is connected to the first connecting member 20. The required angular position and distance position of the test carbon brush are adjusted, and then it is fixed through the first locking member.
[0054] Then, the first connecting member 20 is sleeved on the annular portion 12, and the position and angle of the first connecting member 20 are adjusted. The first connecting member 20 is fixed through the second locking member.
[0055] Pass the positive and negative wires of the test carbon brush through the communication hole 43, apply the first sealant between the sealing cover 40 and the base 10, and fix the sealing cover 40 and the base 10 with fasteners. Finally, plug the communication hole 43 with a plug and seal it with the second sealant.
[0056] Start the test after the assembly is completed.
[0057] The motor shaft voltage test device of this embodiment has the following advantages:
[0058] 1. The motor shaft voltage test device improves the safety of the shaft voltage test experiment. The motor shaft voltage test device can be better directly fixed on the end cover of the motor to be tested, and can be modularized with the change of the motor to be tested, which can avoid problems such as the inability to install due to space interference in the installation area.
[0059] 2. The motor shaft voltage test device of this embodiment improves the data accuracy of the experiment. It can be different from the method used in traditional tests, and can become an integral part with the motor to be tested, solving the problem that the test points of the test carbon brush are inconsistent due to vibrations, jitters, offsets, etc. generated during the test, resulting in inaccurate test accuracy.
[0060] 3. The motor shaft voltage test device of this embodiment has good sealing performance, which allows the motor to be tested to simultaneously perform the motor shaft voltage test in the high and low temperature environments in the environmental chamber.
[0061] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.
[0062] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.
[0063] In addition, it should be noted that the use of terms such as "first" and "second" to define components is only for the convenience of differentiating the corresponding components. Without further statement, the above terms have no special meaning, and thus should not be construed as limiting the protection scope of the present utility model.
[0064] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A motor shaft voltage testing device, characterized in that: include: Base (10); A first connecting member (20) is arranged on the base (10) in an adjustable manner around a first preset axis; A second connecting member (30) is rotatably connected to the first connecting member (20) around a second preset axis, and the second connecting member (30) is used to fix a test carbon brush; The first preset axis is parallel to the axis direction of the motor to be tested, and there is a preset angle between the first preset axis and the second preset axis.
2. The motor shaft voltage testing device according to claim 1, characterized in that: The second connecting member (30) comprises a connecting rod (31) and a clamping portion (32), wherein the clamping portion (32) is arranged on the connecting rod (31), and a mounting hole (21) is arranged on the first connecting member (20), wherein the connecting rod (31) is inserted into the mounting hole (21) and can rotate and move in the mounting hole (21).
3. The motor shaft voltage testing device according to claim 2, characterized in that: The motor shaft voltage testing device further comprises a first locking member, which is arranged between the first connecting member (20) and the connecting rod (31) and is used to lock the position of the connecting rod (31).
4. The motor shaft voltage testing device according to claim 2, characterized in that: The first connecting member (20) comprises a connecting ring (22), the mounting hole (21) is arranged on the connecting ring (22), and the connecting ring (22) can rotate relative to the base (10) and can move away from or approach the base (10).
5. The motor shaft voltage testing device according to claim 4, characterized in that: The motor shaft voltage testing device further comprises a second locking member, which is arranged between the first connecting member (20) and the base (10) and is used to lock the position of the first connecting member (20).
6. The motor shaft voltage testing device according to claim 1, characterized in that: The base (10) comprises a main body portion (11) and an annular portion (12) arranged on the main body portion (11), and the first connecting member (20) is nested and matched with the annular portion (12).
7. The motor shaft voltage testing device according to claim 1, characterized in that: The motor shaft voltage testing device further comprises a sealing cover (40), wherein the sealing cover (40) is disposed on the first connecting member (20) and the second connecting member (30) and is connected to the base (10).
8. The motor shaft voltage testing device according to claim 7, characterized in that: The sealing cover (40) comprises a cover body (41) and an outer convex edge (42) connected to the cover body (41), and the outer convex edge (42) is connected to the base (10).
9. The motor shaft voltage testing device according to claim 8, characterized in that: The outer convex edge (42) is provided with an arc-shaped groove (421), and the motor shaft voltage testing device further comprises a fastener, which is inserted into the arc-shaped groove (421) and connected to the base (10).
10. The motor shaft voltage testing device according to claim 8, characterized in that: A first sealant is provided between the outer convex edge (42) and the base (10).
11. The motor shaft voltage testing device according to claim 7, characterized in that: The sealing cover (40) is provided with a communicating hole (43), a sealing plug is provided in the communicating hole (43), and a second sealing glue is provided between the sealing plug and the communicating hole (43).