Motor shaft voltage dredging structure and motor
By designing the first and second conductive parts that are always in contact in the motor shaft voltage drainage structure, the regular maintenance and replacement problems caused by friction and wear in the prior art are solved, and the effect of reducing maintenance costs and workload is achieved.
Patent Information
- Application Number
- CN202420883481.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-25
AI Technical Summary
In the existing motor shaft voltage diversion structure, the sliding contact between the metal ring or carbon brush and the motor shaft will cause wear due to friction, which will require regular maintenance and replacement, which increases maintenance costs and workload.
A motor shaft voltage drainage structure is provided, including a first conductive part, a second conductive part and a motor end cover. The first conductive part is connected to the non-output end of the motor shaft, and the second conductive part is installed in the receiving cavity of the motor end cover, and is always in contact with the first conductive part to divert the shaft voltage/axis current of the motor shaft.
By always maintaining contact between the first conductive part and the second conductive part, failure of the guide structure caused by wear is avoided, the frequency of maintenance and replacement is reduced, and maintenance costs and workload are reduced.
Smart Images
Figure CN222602210U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and specifically provides a motor shaft voltage conduction structure and a motor. Background Art
[0002] In the related motor shaft voltage diversion structure, a metal ring or carbon brush with good conductivity is usually installed near the non-output end of the motor shaft to divert the motor shaft voltage to prevent the shaft current from damaging the bearing. Although this structure can effectively reduce the impact of the shaft current on the bearing, the sliding contact between the metal ring or carbon brush and the motor shaft will cause wear due to friction, resulting in a gap between the metal ring or carbon brush and the motor shaft, making it impossible to divert the motor shaft voltage, so it needs to be regularly inspected and replaced, increasing maintenance costs and workload.
[0003] Accordingly, the art requires a new motor shaft voltage conduction structure to solve the above problems. Summary of the invention
[0004] The present invention aims to solve the above technical problem, that is, to solve the problem that the sliding contact between the metal ring or carbon brush and the motor shaft in the existing motor shaft voltage conduction structure will cause wear due to friction and require regular inspection and replacement.
[0005] In a first aspect, the present invention provides a motor shaft voltage diversion structure, the diversion structure comprising:
[0006] A first conductive portion formed at a non-output end of the motor shaft or connected to the non-output end of the motor shaft;
[0007] a motor end cover, which is arranged on a side close to the non-output end of the motor shaft, the motor end cover comprising a receiving cavity, the receiving cavity having an opening opened toward the motor shaft; and
[0008] The second conductive part is installed in the accommodating cavity and is configured to always be in contact with the first conductive part so that the shaft voltage / shaft current of the motor shaft is conducted from the motor shaft to the motor end cover.
[0009] In the preferred technical solution of the above motor shaft voltage conducting structure, the second conductive part includes:
[0010] a conductive member in contact with a side wall of the accommodating cavity; and
[0011] An elastic member, one end of which is close to the conductive member butts against the conductive member, and one end of which is far from the conductive member butts against the top wall of the accommodating cavity, so that the conductive member contacts the accommodating cavity under the action of the elastic member.
[0012] In the preferred technical solution of the above-mentioned motor shaft voltage conduction structure, the conductive member is a conductive plate, and the non-output end of the conductive plate corresponding to the motor shaft is a closed end.
[0013] In a preferred technical solution of the above-mentioned motor shaft voltage conduction structure, the first conductive portion is a first protrusion, and the first protrusion is formed on a surface of the closed end facing the conductive plate.
[0014] In the preferred technical solution of the above motor shaft voltage conducting structure, the first conductive part includes:
[0015] a fixing ring, which is sleeved on the side wall of the non-output end of the motor shaft and has an interference fit therewith; and
[0016] A second protrusion is formed on an end surface of the fixing ring close to the second conductive portion.
[0017] In the preferred technical solution of the above-mentioned motor shaft voltage conduction structure, the conductive member is a conductive ring.
[0018] In the preferred technical solution of the above-mentioned motor shaft drainage structure, the elastic member is a spring.
[0019] In the preferred technical solution of the above-mentioned motor shaft voltage conduction structure, the elastic member is a wave spring.
[0020] In the preferred technical solution of the above-mentioned motor shaft drainage structure, the conductive member is integrally connected with the elastic member; or
[0021] The conductive member is separately connected to the elastic member.
[0022] In a second aspect, the present invention further provides a motor, comprising the motor shaft voltage conduction structure as described in any of the aforementioned schemes.
[0023] When adopting the above technical scheme, the motor shaft voltage conduction structure of the utility model includes a first conductive part, a second conductive part and a motor end cover. The overall conduction structure is simple and easy to implement. The first conductive part of the present application is connected to the non-output end of the motor shaft, and the second conductive part is installed in the accommodating cavity on the motor end cover, and the position of the second conductive part is configured to always remain connected to the second conductive part. In this way, wear occurs between the first conductive part and the second conductive part due to long-term rotation of the motor shaft. Since the second conductive part is configured to be able to always remain connected to the first conductive part, the conduction performance of the conduction structure can be guaranteed, thereby reducing the frequency of inspection and replacement, and reducing maintenance costs and workload. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:
[0025] Figure 1 It is a structural schematic diagram of a motor shaft voltage conduction structure according to an embodiment of the utility model.
[0026] Figure 2 It is a structural schematic diagram of a motor shaft voltage conduction structure according to another embodiment of the utility model.
[0027] List of reference numerals:
[0028] 100. Guide structure; 1. Motor shaft; 11. Non-output end; 2. First conductive part; 21. Fixing ring; 22. First protrusion; 23. Second protrusion; 3. Second conductive part; 31. Conductive member; 32. Elastic member; 4. Motor end cover; 41. Accommodating chamber. DETAILED DESCRIPTION
[0029] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.
[0030] It should be noted that in the description of the present invention, the terms "inside" and "outside" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0031] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "installed" should also be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0032] Embodiment 1
[0033] In order to solve the problem that the sliding contact between the metal ring or carbon brush and the motor shaft in the existing motor shaft voltage conduction structure will cause wear due to friction, and regular maintenance and replacement are required. Figure 1As shown, the utility model provides a motor shaft voltage conduction structure 100, and the conduction structure 100 includes: a first conductive part 2, a motor end cover 4 and a second conductive part 3. The first conductive part 2 is formed at the non-output end 11 of the motor shaft 1 or is connected to the non-output end 11 of the motor shaft 1. The motor end cover 4 is arranged on a side close to the non-output end 11 of the motor shaft 1, and the motor end cover 4 includes a accommodating cavity 41, and the accommodating cavity 41 has an opening opened in the direction of the motor shaft 1. The second conductive part 3 is installed in the accommodating cavity 41, and the position of the second conductive part 3 is configured to be able to always contact with the first conductive part 2, so that the shaft voltage / shaft current of the motor shaft 1 can be conducted from the motor shaft to the motor end cover 4.
[0034] It should be noted that, in the specific implementation of the present invention, the connection between the first conductive portion 2 and the non-output end 11 of the motor shaft 1 can be integrally formed or can also be a common connection form such as welding, screwing, connection through other fixing components, or can also be rotatably connected to the non-output end 11 of the motor shaft 1 through a thrust bearing. The specific connection structure will not be repeated here.
[0035] When the above technical solution is adopted, the voltage conduction structure 100 of the motor shaft 1 of the utility model includes a first conductive part 2, a second conductive part 3 and a motor end cover 4. The overall conduction structure 100 is simple and easy to implement. The first conductive part 2 of the present application is fixedly connected to the non-output end 11 of the motor shaft 1, and the second conductive part 3 is installed on the accommodating cavity 41 of the motor end cover 4, and the position of the second conductive part 3 is configured to always remain connected to the first conductive part 2. In this way, even if wear occurs between the first conductive part 2 and the second conductive part 3 due to long-term rotation of the motor shaft 1, the second conductive part 3 can also maintain contact with the first conductive part 2, so that the conduction performance of the conduction structure 100 can be guaranteed, thereby reducing the frequency of inspection and replacement, and reducing the maintenance cost and workload.
[0036] As a possible implementation, Figure 1As shown, the second conductive part 3 includes a conductive member 31 and an elastic member 32, and the conductive member 31 contacts the side wall of the accommodating cavity 41 of the motor end cover 4. One end of the elastic member 32 close to the conductive member 31 stops at the conductive member 31, and one end of the elastic member 32 away from the conductive member 31 stops at the top wall of the accommodating cavity 41, so that the conductive member 31 is elastically slidably connected with the accommodating cavity 41 under the action of the elastic member 32, so that the conductive member 31 can always contact and cooperate with the first conductive part 2 under the action of the elastic force of the elastic member 32. Specifically, in the specific implementation of the present invention, the accommodating cavity 41, the conductive member 31 and the elastic member 32 of the motor end cover 4 are arranged so that when the motor end cover 4 is assembled on the motor housing (not shown), the conductive member 31 and the first conductive part 2 fixed to the non-output end 11 of the motor shaft 1 can be pressed against each other, and have a preset first compression amount, so that during the rotation of the motor shaft 1, even if the first conductive part 2 and the second conductive part 3 are worn due to the long-term rotation of the motor shaft 1, or the non-output end 11 of the motor shaft 1 moves toward or away from the motor end cover 4, the conductive member 31 can always maintain the connection with the first conductive part 2 under the action of the elastic member 32, thereby ensuring the drainage performance of the drainage structure 100 of the present invention. Moreover, through the above-mentioned arrangement, the installation process of the conductive member 31 and the elastic member 32 is relatively simple, and the elastic member 32 only needs to be placed in the accommodating cavity 41 in sequence.
[0037] It should be noted that the preset first compression amount can be determined by the designer based on experience, experiments, calculations, etc. For example, the preset compression amount can be set to 2 mm, so that during the rotation of the motor shaft 1, even if the non-output end 11 of the motor shaft 1 moves toward or away from the motor end cover 4, and when the first conductive part 2 and / or the second conductive part 3 are worn, the conductive part 31 can always maintain connection with the first conductive part 2 under the action of the elastic part 32. Obviously, the preset first compression amount can also be 1 mm or 3 mm, as long as the first conductive part 2 and the second conductive part 3 can remain connected.
[0038] As a possible implementation, Figure 1 As shown, the conductive member 31 is a conductive plate, and the conductive plate is a closed end corresponding to the non-output end 11 of the motor shaft 1. Further, the outer contour of the planar solid plate matches the side wall of the motor end cover 4, so that the conductive plate can slide along the side wall of the accommodating cavity 41.
[0039] It should be noted that, in other embodiments of the utility model, an anti-flipping structure may be provided on the conductive plate, so that when the conductive plate slides along the side wall of the accommodating cavity 41, the front face of the conductive plate can always be parallel to the first end face of the non-output end 11 of the motor shaft 1, or the angle between the front face of the conductive plate and the first end face of the non-output end 11 of the motor shaft 1 is less than a preset angle, so that the conductive plate can slide stably in the accommodating cavity 41. Specifically, the anti-flipping structure may include a guide groove provided on the side wall of the accommodating cavity 41 and a slider provided at a corresponding position on the conductive plate and capable of being embedded in the guide groove, so that when the conductive plate slides in the accommodating cavity 41, it can maintain stable sliding without flipping under the action of the slider and the guide groove. Obviously, the anti-flipping structure may also be in other forms, for example, the conductive plate may also have a preset thickness, so that the conductive plate can slide in a balanced manner in the accommodating cavity 41.
[0040] As a possible implementation, Figure 1 As shown, the first conductive part 2 is a first protrusion 22, and the first protrusion 22 is formed on the surface facing the conductive plate in the closed end. Further, the first protrusion 22 is formed at the center position of the surface facing the conductive plate in the closed end. Through the above-mentioned setting method, the first protrusion 22 can fully contact and cooperate with the conductive plate, and the first protrusion 22 can achieve point connection with the conductive plate when the motor shaft 1 rotates. Moreover, since the first protrusion 22 is the first protrusion 22 set at the center position of the first end surface of the non-output end 11 of the motor shaft 1, when the motor shaft 1 rotates, the first protrusion 22 will not move relative to the radial direction of the conductive plate, or the first protrusion 22 will move relative to the radial direction of the conductive plate by a small amplitude, so that the friction loss between the first protrusion 22 and the conductive plate can be reduced, and the temperature rise caused by friction between the first protrusion 22 and the conductive plate can be reduced to ensure the performance of the motor.
[0041] In addition, during the production of the motor shaft 1 , the first protrusion 22 and the motor shaft 1 may be integrally formed so as to reduce the overall processing cost of the drainage structure 100 and improve the stability of the connection between the first protrusion 22 and the motor shaft 1 .
[0042] As a possible implementation, Figure 1As shown, the elastic member 32 is a spring. Through this arrangement, the conductive member 31 can always keep in contact with the first protrusion 22 under the support force of the spring. Further, in the specific implementation of the utility model, the elastic member 32 is set as a wave spring, so that the wave spring can provide uniform and stable support force and restoring force for the conductive member 31, so that the conductive member 31 can perform smooth reciprocating motion in the accommodating cavity 41 under the action of the wave spring. Moreover, since the conductive member 31 can slide smoothly in the accommodating cavity 41, the risk of friction between the conductive member 31 and the inner wall of the accommodating cavity 41 when sliding inside the accommodating cavity 41 can be reduced, so as to reduce the pressure between the non-output end 11 of the motor shaft 1 and the conductive member 31 when the motor rotates, and further reduce the loss of the conductive member 31, so as to further reduce the frequency of maintenance and replacement.
[0043] It should be noted that although the above combination Figure 1 The elastic member 32 is described as a wave spring, but this is not restrictive. The elastic member 32 can also be a coil spring, a disc spring, or the like that can provide a stable elastic force for the conductive member 31 .
[0044] As a possible implementation, the conductive member 31 is made of a conductive wear-resistant material, such as a conductive metal, a conductive metal alloy, a conductive plastic, and a conductive polymer composite material, so as to ensure the stability of the conductive member 31 in use.
[0045] As a possible implementation, the conductive member 31 is integrally connected with the elastic member 32. Furthermore, the elastic member 32 and the conductive member 31 may be integrally connected by welding, or may be integrally connected together by integral molding, so that the conductive member 31 and the elastic member 32 can be reliably connected. The above arrangement can also reduce the number of parts of the drainage structure 100 and simplify the installation process.
[0046] Embodiment 2
[0047] This embodiment provides a motor shaft 1 voltage conduction structure 100, which is basically the same as the motor structure provided in the first embodiment, except that the first conductive part 2 and the second conductive part 3 are arranged differently.
[0048] As a possible implementation, Figure 2As shown, the first conductive part 2 includes a fixing ring 21 and a second protrusion 23, and the fixing ring 21 is sleeved on the side wall of the non-output end 11 of the motor shaft 1 and has an interference fit therewith. The second protrusion 23 is formed on the second end face of the fixing ring 21 close to the second conductive part 3. Through this arrangement, the first conductive part 2 and the motor shaft 1 can be processed separately to reduce the processing difficulty when the second protrusion 23 is arranged at a non-axial position of the motor shaft 1, so as to simplify the processing procedure and further reduce the processing cost. Among them, the interference fit connection method between the fixing ring 21 and the side wall of the non-output end 11 of the motor shaft 1 is common knowledge in the art and will not be repeated here.
[0049] As a possible implementation, Figure 2 As shown, the conductive member 31 is a conductive ring, specifically, the conductive ring abuts against an end of the elastic member 32 arranged in the accommodating cavity 41 close to the conductive member 31, and the conductive ring is slidably connected to the side wall of the accommodating cavity 41, and the position of the conductive ring is constructed so that when the motor shaft 1 is in the assembly position, the second protrusion 23 arranged on the fixing ring 21 can be crimped with the conductive ring and have a preset second compression amount, so that during the rotation of the motor shaft 1, even if the first conductive part 2 and the second conductive part 3 are worn due to the long-term rotation of the motor shaft 1, or the non-output end 11 of the motor shaft 1 moves toward or away from the motor end cover 4, the conductive member 31 can always maintain the connection with the first conductive part 2 under the action of the elastic member 32, thereby ensuring the drainage performance of the drainage structure 100 of the present invention.
[0050] It should be noted that the preset second compression amount can be determined by the designer based on experience, experiments, calculations, etc. For example, the preset compression amount can be set to 2 mm, so that during the rotation of the motor shaft 1, even if the non-output end 11 of the motor shaft 1 moves toward or away from the motor end cover 4, and when the first conductive part 2 and / or the second conductive part 3 are worn, the conductive part 31 can always maintain connection with the first conductive part 2 under the action of the elastic part 32. Obviously, the preset second compression amount can also be 1 mm or 3 mm, as long as the first conductive part 2 and the second conductive part 3 can remain connected.
[0051] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims of the present application, any one of the claimed embodiments may be used in any combination.
[0052] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims
1. A motor shaft voltage conduction structure, characterized in that: The drainage structure comprises: A first conductive portion formed at a non-output end of the motor shaft or connected to the non-output end of the motor shaft; a motor end cover, which is arranged on a side close to the non-output end of the motor shaft, the motor end cover comprising a receiving cavity, the receiving cavity having an opening opened toward the motor shaft; and The second conductive part is installed in the accommodating cavity and is configured to always be in contact with the first conductive part so that the shaft voltage / shaft current of the motor shaft is conducted from the motor shaft to the motor end cover.
2. The drainage structure according to claim 1, characterized in that: The second conductive portion includes: a conductive member in contact with a side wall of the accommodating cavity; and An elastic member, one end of which is close to the conductive member butts against the conductive member, and one end of which is far from the conductive member butts against the top wall of the accommodating cavity, so that the conductive member contacts the accommodating cavity under the action of the elastic member.
3. The drainage structure according to claim 2, characterized in that: The conductive member is a conductive plate, and the non-output end of the conductive plate corresponding to the motor shaft is a closed end.
4. The drainage structure according to claim 3, characterized in that: The first conductive portion is a first protrusion formed on a surface of the closed end facing the conductive plate.
5. The drainage structure according to claim 2, characterized in that: The first conductive portion includes: a fixing ring, which is sleeved on the side wall of the non-output end of the motor shaft and has an interference fit therewith; and A second protrusion is formed on an end surface of the fixing ring close to the second conductive portion.
6. The drainage structure according to claim 5, characterized in that: The conductive member is a conductive ring.
7. The drainage structure according to claim 2, characterized in that: The elastic member is a spring.
8. The drainage structure according to claim 7, characterized in that: The elastic member is a wave spring.
9. The drainage structure according to claim 2, characterized in that: The conductive member is integrally connected with the elastic member; or The conductive member is separately connected to the elastic member.
10. A motor, characterized in that: The motor is provided with the drainage structure according to any one of claims 1-9.