Conductive ring, conductive module, motor and device

Abstract

The present application relates to the technical field of conductive ring, and provides a conductive ring, a conductive module, a motor and equipment, the conductive ring includes a support part, the support part has a containing space arranged in the axial direction;The inner wall surface of the containing space is provided with a fixed conductive part and a telescopic conductive part in the circumferential direction, and the fixed conductive part and the telescopic conductive part protrude from the inner wall surface of the containing space.The telescopic conductive part can realize the body conduction with the motor shaft at low speed, and realize the release of shaft voltage through the telescopic conductive part.Further, the telescopic conductive part can work together with the fixed conductive part to realize stable conduction at medium speed.Further, it can be separated from the abutment with the motor shaft body at high speed, which avoids the wear of the telescopic conductive part at high speed and improves the service life of the conductive ring.

Description

Technical Field

[0001] This invention relates to the technical field of conductive rings, and more particularly to a conductive ring, conductive module, block motor, and device. Background Technology

[0002] Conductive rings are used in various fields to connect with rotating bodies and transmit electrical signals. They are especially indispensable components in electric motors.

[0003] In electric motors, conductive rings are commonly connected to the motor shaft via bearings. This means that at low motor speeds, the relative positions of the bearing's inner and outer rings and the balls are affected by gravity and pressure from the front-end drive components, causing the balls to shift to one side. This results in some of the lubricating grease on the balls breaking down. At this point, the bearing's resistance is at its lowest, the breakdown voltage due to shaft voltage is also at its lowest, and the bearing's pressure resistance is weakest, making it susceptible to electrolytic corrosion. In other words, conductive rings in related technologies are ineffective at providing effective protection for bearings at low speeds. Summary of the Invention

[0004] This invention provides a conductive ring, a conductive module, a motor, and a device to address the shortcomings of existing technologies that struggle to effectively protect bearings at low motor speeds.

[0005] This invention provides a conductive ring, comprising:

[0006] The support portion has an accommodating space along the axial direction. A fixed conductive element and a telescopic conductive element are arranged in the circumferential direction on the inner wall surface of the accommodating space, and the fixed conductive element and the telescopic conductive element protrude from the inner wall surface of the accommodating space.

[0007] According to the conductive ring provided by the present invention, the fixed conductive element and the telescopic conductive element are respectively arranged circumferentially on the inner wall of the accommodating space.

[0008] According to the conductive ring provided by the present invention, the telescopic conductive member is slidably connected to the support portion, so that the telescopic conductive member can move radially along the support portion.

[0009] According to the conductive ring provided by the present invention, the support portion is provided with a mounting groove, and the mounting groove is arranged radially along the support portion;

[0010] The fixed conductive component is fixedly disposed in the mounting groove, and the telescopic conductive component is slidably connected to the mounting groove.

[0011] According to the conductive ring provided by the present invention, a plurality of fixed conductive elements and a plurality of telescopic conductive elements are arranged on the same plane.

[0012] According to the conductive ring provided by the present invention, the telescopic conductive member includes a fixed base and a conductive rod, the conductive rod being slidably connected to the fixed base, and the fixed base being disposed in the mounting groove.

[0013] According to the conductive ring provided by the present invention, the fixing seat can be detachably installed in the mounting groove.

[0014] According to the conductive ring provided by the present invention, the support portion includes an inner housing and an outer housing, wherein the inner housing and the outer housing are snapped together.

[0015] The conductive ring provided by the present invention further includes a retainer for supporting the fixed conductive member and the telescopic conductive member, the retainer being disposed within the inner housing.

[0016] The present invention also provides a conductive module, comprising an arc-shaped conductive module body, a fixed conductive component, and a telescopic conductive component;

[0017] The fixed conductive element and the telescopic conductive element are disposed on the conductive module body, and the fixed conductive element and the telescopic conductive element extend freely from either the inner side wall or the outer side wall of the conductive module body.

[0018] The present invention also provides an electric motor, including an electric motor housing, an electric motor rotating part, and a conductive module as described above. The conductive module is electrically connected to the electric motor housing, and the free extension end of the telescopic conductive member and the free extension end of the fixed conductive member are respectively electrically connected to the electric motor rotating part.

[0019] The present invention also provides an electric motor, including a motor shaft and a housing, wherein a conductive ring as described in any of the above embodiments is provided between the motor shaft and the housing.

[0020] The present invention also provides a device comprising at least one motor and the aforementioned conductive module;

[0021] The motor includes either the motor with a conductive ring or the motor with a conductive module as described above.

[0022] According to any of the above embodiments, the present invention has at least the following beneficial effects:

[0023] The present invention provides a conductive ring, which, through the setting of a telescopic conductive element, allows the telescopic conductive element to pierce the oil film of the conductive shaft at low speed, so as to release the shaft voltage mainly through the telescopic conductive element, thereby better protecting the bearing. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is one of the structural schematic diagrams of the conductive ring provided by the present invention;

[0026] Figure 2 yes Figure 1 Cross-sectional view of the conductive ring in the BB direction;

[0027] Figure 3 yes Figure 2 Cross-sectional view of the conductive ring in the CC direction;

[0028] Figure 4 This is the second schematic diagram of the conductive ring provided by the present invention;

[0029] Figure 5 yes Figure 1 Cross-sectional view of the conductive ring in the AA direction;

[0030] Figure 6 yes Figure 2 Cross-sectional view of the conductive ring in the DD direction;

[0031] Figure 7 yes Figure 4 The exploded structure diagram of the conductive ring provided in the image.

[0032] Figure label:

[0033] 10. Support; 101. Accommodating space; 102. Fixing hole; 103. Inner wall surface; 104. Mounting groove; 110. Inner shell; 120. Outer shell;

[0034] 20. Fix conductive components;

[0035] 30. Telescopic conductive component; 301. Fixing base; 302. Conductive rod; 303. Telescopic accommodating space;

[0036] 40. Cage; 401. Positioning groove. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0038] The following is combined with Figure 1 , Figure 4 The present invention describes a conductive ring that is connected to a motor shaft, particularly suitable for oil-cooled motors. The conductive ring includes a support portion 10 having an axially arranged accommodating space 101; a fixed conductive element 20 and a telescopic conductive element 30 are disposed around the inner wall surface 103 of the accommodating space 101, and the fixed conductive element 20 and the telescopic conductive element 30 protrude from the inner wall surface 103.

[0039] In a specific example, the resistance of the telescopic conductive member 30 is less than the resistance of the fixed conductive member 20. The support portion 10 is constructed as a ring shape, and the accommodating space 101 is used to fit the support portion 10 onto the motor shaft, ensuring an interference fit between the fixed conductive member 20 and the motor shaft, and an abutting fit between the telescopic conductive member 30 and the motor shaft, thus achieving the connection between the support portion 10 and the motor shaft.

[0040] The accommodating space 101 can be a through hole or slot arranged along the axial direction of the shaft. Specifically, as shown... Figure 1 As shown, in this embodiment, the accommodating space 101 is constructed as a perforated structure.

[0041] It should be understood that in an electric motor, the motor shaft is connected to the motor housing via bearings. Due to gravity, when the bearing balls are stationary or at low speeds, they are biased to one side. Since there is no formed oil film at this time, the inner and outer rings of the bearing are conductive through the balls, resulting in low resistance. As the motor shaft's rotational speed increases, a closed, formed oil film gradually forms around the balls. During this process, the bearing resistance increases from small to large, eventually reaching its maximum value, at which point the oil film thickness is uniform and sealed. That is, at low speeds, there is a problem of shaft voltage release through the bearing. This invention solves this problem by providing a telescopic conductive element 30, which allows the telescopic conductive element 30 to conduct through the motor shaft at low speeds. Furthermore, the contact resistance of the telescopic conductive element 30 is less than the bearing resistance at stationary and low speeds, thus improving the protection effect on the bearing. Specifically, the fixed conductive element 20 is made of conductive fiber, and the telescopic conductive element 30 is primarily made of metal, polymer materials, or graphite-metal composites.

[0042] In the above embodiments, the fixed conductive member 20 is connected to the support part 10 in a fixed connection manner, and the telescopic conductive member 30 is connected to the support part 10 in a sliding connection manner. The telescopic conductive member 30 can achieve a conductive state by contacting the motor shaft, or achieve a non-conductive state by disengaging from the contact with the motor shaft.

[0043] Specifically, when the motor shaft rotates, an oil film forms on its surface, and the distribution of this oil film can be roughly described by low, medium, and high speeds. When the motor shaft rotates at low speeds (less than 1000 r / min), the oil film on the shaft has not yet formed due to the low rotational speed. The telescopic conductive element 30 can easily contact the outer wall of the motor shaft to achieve conductivity. Since the resistance of the telescopic conductive element 30 is less than the resistance of the fixed conductive element 20 and less than the resistance of the balls in the motor bearing, the shaft voltage of the motor shaft is released through the telescopic conductive element 30 at low speeds. This avoids electro-corrosion of the bearing due to conduction at low speeds, effectively protecting the bearing at low speeds.

[0044] When the motor shaft rotates at a speed (less than 5000 r / min), the speed of the motor shaft increases, and the oil film of the motor bearing gradually forms. However, the distribution of the oil film on the motor bearing is not uniform at this time, and the shaft voltage rises. As the speed increases, the telescopic conductive element 30 is lifted by the oil film on the bearing surface, which slowly reduces the conductivity. The release of the shaft voltage is completed by the fixed conductive element 20 and the telescopic conductive element 30 together.

[0045] At high motor shaft speeds (greater than 5000 r / min), the motor bearing oil film is uniform, the shaft voltage rises to its maximum, and the bearing's pressure resistance is at its best. Simultaneously, the discharge intensity is higher, leading to greater bearing damage. The conductive rod 302 is completely supported by the oil film on the shaft, losing its conductive function. At this point, the shaft voltage release is entirely accomplished by the conductive fibers.

[0046] As can be understood, through the above description, the motor of the present invention mainly releases shaft voltage in the low-speed stage by the telescopic conductive member 30, in the medium-speed stage by the fixed conductive member 20, with the telescopic conductive member 30 serving as an auxiliary conductor, and in the high-speed stage by the fixed conductive member 20, the shaft voltage is mainly released by the fixed conductive member 20. At this time, the telescopic conductive member 30 is completely lifted, and its conductivity failure is mainly achieved by the fixed conductive member 20.

[0047] Specifically, the telescopic conductive element 30 can achieve its telescopic function in a variety of ways. For example, it can be telescopically extended by setting an elastic element, or it can be telescopically extended by pneumatic drive.

[0048] The conductive ring described above will be explained below through specific embodiments.

[0049] Example 1

[0050] like Figures 1-3 The conductive ring shown includes a support portion 10 for forming the conductive ring body. The support portion 10 has an accommodating space 101 arranged along the axial direction. A plurality of fixed conductive elements 20 and a plurality of telescopic conductive elements 30 are arranged around the inner wall of the accommodating space 101 in a spaced-apart manner. The plurality of fixed conductive elements 20 and the plurality of telescopic conductive elements 30 are arranged at intervals around the inner wall of the accommodating space 101. The resistance of the telescopic conductive element 30 is less than the resistance of the fixed conductive element 20.

[0051] Among them, such as Figure 2 As shown, the support part 10 is an integrally formed structure. An axially arranged accommodating space 101 is machined in the center of the support part 10. The connection between the conductive ring and the motor shaft can be realized through the accommodating space 101, thereby enabling effective conduction between the telescopic conductive part 30 and the motor shaft at low speed.

[0052] In the above embodiments, there are one or more telescopic conductive elements 30 and fixed conductive elements 20, and the telescopic conductive elements 30 and fixed conductive elements 20 are arranged around the perimeter of the accommodating space 101. Figure 3 As shown, when there are multiple telescopic conductive elements and multiple fixed conductive elements, the arrangement of multiple telescopic conductive elements 30 and multiple fixed conductive elements 20 makes the present invention more stable when connected to the motor shaft, and provides a more stable conductive path. The circumferentially spaced arrangement allows the telescopic conductive elements 30 to be located in various positions on the motor shaft, giving it more stable conductivity at low speeds. Specifically, during connection, the fixed conductive elements 20 are connected to the motor shaft by an interference fit. This allows for more contact surfaces with the outer surface of the motor shaft when multiple fixed conductive elements 20 are arranged, making the connection more stable.

[0053] Specific examples, such as Figure 3 As shown, multiple telescopic conductive elements 30 and multiple fixed conductive elements 20 are arranged on the same plane. This arrangement on the same plane makes assembly and manufacturing more convenient and facilitates mass production. Of course, those skilled in the art should know that the multiple telescopic conductive elements 30 and multiple fixed conductive elements 20 can also be arranged on different planes. That is, the fixed conductive elements 20 can be arranged arbitrarily along the inner wall of the accommodating space 101, so that they are distributed within a certain range along the axial direction of the motor shaft, which can provide a more stable connection structure.

[0054] In a further example, the number of telescopic conductive elements 30 is less than the number of fixed conductive elements 20. The telescopic conductive elements 30 provide conductivity at low speeds, while the fixed conductive elements 20 provide conductivity at medium and high speeds. At medium and high speeds, the shaft voltage of the motor shaft is relatively high, so more fixed conductive elements 20 can provide a more stable conductive path, making the conductive ring of the present invention have more stable conductivity.

[0055] More specific examples, such as Figure 3 As shown, multiple telescopic conductive elements 30 and multiple fixed conductive elements 20 are arranged at even intervals around the support portion 10. Specifically, four telescopic conductive elements 30 and nine fixed conductive elements 20 are arranged at equal intervals. It should be noted that the above limitation on the number of telescopic conductive elements 30 and fixed conductive elements 20 is merely illustrative; those skilled in the art can freely configure the number according to specific working conditions based on the above description.

[0056] Continue as Figure 3 As shown, the extension distance of the telescopic conductive member 30 extending from the inner wall of the accommodating space 101 to the center is slightly greater than the extension distance of the fixed conductive member 20 extending from the inner wall of the accommodating space 101 to the center. This allows the telescopic conductive member 30 to stably abut against the motor shaft when the fixed conductive member 20 is interference-fitted with the motor shaft, thus providing stable conduction at low speeds.

[0057] Understandably, when the motor shaft rotates at high speed, the conductive ring can also rotate at high speed. During the high-speed rotation, on the one hand, a stable oil film is formed on the surface of the motor shaft. At this time, the oil film has a certain thickness and can play an isolation role. On the other hand, the telescopic conductive component 30 is subjected to the centrifugal force generated by the rotation. Under the combined action, the telescopic conductive component 30 is no longer connected to the motor shaft and conducts electricity through the fixed conductive post. This avoids the wear of the telescopic conductive component 30 caused by the high-speed rotation of the motor shaft, and improves the overall service life and stability.

[0058] In one specific example of the telescopic conductive member 30 in the above embodiments, the telescopic conductive member 30 is slidably connected to the support portion 10 so that the telescopic conductive member 30 can move radially along the support portion 10.

[0059] The telescopic conductive element 30 is disposed in the support portion 10 by means of sliding fit and can slide back and forth along the radial direction of the support portion 10. That is, there is a telescopic receiving space 303 in the support portion 10 that can accommodate the telescopic conductive element 30 to slide back and forth, and the telescopic function of the telescopic conductive element 30 is realized by the reciprocating sliding.

[0060] In a specific example, the support portion 10 is provided with a mounting groove 104, which is arranged radially along the support portion 10. The fixed conductive element 20 is fixedly disposed in the mounting groove 104, and the telescopic conductive element 30 is slidably connected to the mounting groove 104.

[0061] In the above embodiment, the mounting groove 104 penetrates the support portion 10 radially, and the assembly is achieved by setting a fixed conductive element 20 and a telescopic conductive element 30 within the mounting groove 104. To ensure uniformity in the arrangement of the telescopic conductive element 30 and the fixed conductive element 20, the mounting groove 104 is arranged uniformly within the support portion 10. This uniform arrangement allows for a more stable connection structure when the conductive ring is connected to the motor shaft.

[0062] In a further example, the telescopic conductive member 30 includes a fixed base 301 and a conductive rod 302, the conductive rod 302 being slidably connected to the fixed base 301, and the fixed base 301 being disposed in the mounting groove 104.

[0063] The fixed base 301 has a telescopic receiving chamber, and the conductive rod 302 extends out of the telescopic receiving chamber, and the conductive rod 302 can reciprocate within the telescopic receiving chamber.

[0064] In the above embodiments, there are multiple ways to connect the conductive rod 302 to the fixed base 301. For example, the extension and retraction control of the conductive rod 302 can be achieved by connecting a pneumatic device to the telescopic accommodating chamber. Similarly, the extension and retraction control of the conductive rod 302 can also be achieved by connecting a hydraulic device. In this embodiment, the extension and contact of the conductive rod 302 can also be maintained by providing an elastic element in the telescopic accommodating chamber. For example, a spring is provided in the telescopic accommodating space 303, with one end of the spring contacting the end of the conductive rod 302 and the other end of the spring contacting the bottom of the telescopic accommodating space 303. The spring's action allows the conductive rod 302 to contact the motor shaft at low speeds, thereby releasing the shaft voltage through the conductive rod 302.

[0065] Specific examples continue as follows Figure 3 As shown, the conductive rod 302 is mainly composed of polymer material or graphite metal composite. One end of the conductive rod 302 located within the telescopic cavity has a limiting shoulder, which prevents the conductive rod 302 from detaching and ensures a relatively stable position. The end of the conductive rod 302 that extends freely has a spherical structure. This spherical structure makes it easier to penetrate the oil film on the surface of the motor shaft when it comes into contact with the motor shaft, thereby achieving conductivity and reducing wear on the conductive rod 302.

[0066] Furthermore, the mounting base 301 is detachably installed in the mounting groove 104. This detachable connection facilitates the disassembly and maintenance of the telescopic conductive component 30, and also allows for adjustment of the position of the telescopic conductive component 30.

[0067] In a specific example, the mounting base 301 is installed in the mounting groove 104 via a threaded connection. Continuing... Figure 3 As shown, the outer wall of the fixing seat 301 is machined with external threads, while the inner wall of the inner mounting groove 104 is provided with internal threads. The threaded connection makes disassembly and replacement more convenient, and the relative position of the conductive rod 302 can also be adjusted through the threaded connection, which improves the applicability of the invention and makes it applicable to various types of motor shaft models.

[0068] The fixing base 301 is threaded into the mounting groove 104. The end of the fixing base 301 near the outer diameter of the support part 10 is provided with a "flathead" or "crosshead" for use with tools such as screwdrivers. With the above structure, the fixing base can be adjusted or disassembled by external tools.

[0069] It is understood that in the above structure, the mounting groove 104 penetrates the support part 10, and external tools such as screwdrivers can be inserted through the through mounting groove 104 and cooperate with the fixing seat 301 to achieve the disassembly or adjustment of the fixing seat 301.

[0070] like Figure 1 As shown, a fixing hole 102 is also provided along the axial direction of the support portion 10, and the fixing hole 102 extends to the location of the mounting groove 104, and the fixing hole 102 corresponds one-to-one with the mounting groove 104. That is, each mounting groove 104 is provided with a fixing hole 102.

[0071] The mounting groove 104 is provided with a fixed conductive component 20 or a telescopic conductive component 30. The fixed conductive component 20 can be fastened by connecting bolts or other fasteners through the fixing hole 102, and the fixing seat 301 of the telescopic conductive component 30 can be fastened by bolts or other fasteners to ensure the stability of the positions of the telescopic conductive component 30 and the fixed conductive component 20 and improve the structural stability of the conductive ring.

[0072] Example 2

[0073] This invention also provides, for example Figures 4-7The conductive ring shown includes a support portion 10 for forming the conductive ring body. The support portion 10 includes an inner shell 110 and an outer shell 120, which are connected by a snap-fit ​​connection. The inner shell 110 defines an axially arranged accommodating space 101. A plurality of fixed conductive elements 20 and a plurality of telescopic conductive elements 30 are arranged around the periphery of the hole wall of the accommodating space 101. The plurality of fixed conductive elements 20 and the plurality of telescopic conductive elements 30 are arranged at intervals around the inner wall of the accommodating space 101, wherein the resistance of the telescopic conductive element 30 is less than the resistance of the fixed conductive element 20.

[0074] The main difference between this embodiment and Embodiment 1 is that, as Figure 5 , 7 As shown, in this embodiment, the support part 10 is a split structure, formed by connecting the inner shell 110 and the outer shell 120. The connection between the inner shell 110 and the outer shell 120 can be achieved by snap-fitting to ensure the stability of the product after snapping, or by riveting from top to bottom.

[0075] Among them, such as Figure 5 , Figure 6 As shown, the fixed conductive component 20 is fixedly mounted on the inner housing 110, and the telescopic conductive component 30 is arranged in a relatively sliding fit with the inner housing 110, allowing the telescopic conductive component 30 to extend and retract. The split structure allows for separate processing of each component, reducing processing difficulty and facilitating automated production for mass production.

[0076] Specifically, it also includes a retainer 40 for supporting the fixed conductive element 20 and the telescopic conductive element 30, the retainer 40 being disposed within the inner housing 110.

[0077] The retainer 40 has a main frame, on which a plurality of positioning grooves 401 are provided at uniform or non-uniform intervals. The positioning grooves 401 are used to limit the position of the fixed conductive component 20 or the telescopic conductive component 30 so that it has a stable assembly position.

[0078] Among them, such as Figure 7 As shown, the cage 40 can be limited by machining a limiting groove on the inner housing 110, placing the main frame within the limiting groove, and thus limiting the main frame in the circumferential direction. Alternatively, the cage 40 can be limited by fastening the inner housing 110 and the outer housing 120 together, giving the cage 40 a relatively stable position.

[0079] The working principle of the conductive rings in the above embodiments is as follows:

[0080] When the motor starts and the speed is less than 1000 r / min, the main shaft voltage is released by the conductive rod 302 in the telescopic conductive member 30, with the fixed conductive member 20 assisting in the release. At low speeds, the conductive rod 302 can easily pierce the oil film, and because the resistance of the conductive rod 302 is lower than that of the fixed conductive member 20, it can release the shaft voltage better at low speeds, thus avoiding electro-corrosion of the motor bearings.

[0081] As the motor speed gradually increases to 5000 r / min, the main shaft voltage is released by the fixed conductive element 20, while the telescopic conductive element 30 assists in releasing the shaft voltage. At this point, due to the increased speed, the bearing oil film gradually forms and exhibits good continuity. The telescopic conductive element 30 then periodically punctures the oil film. Simultaneously, the conductive rod 302 and the conductive fiber work together to release the voltage. This improves the stability of conductivity at medium speeds and further effectively protects the motor bearings.

[0082] When the motor speed is increased to 5000 r / min or higher, the oil film on the surface of the motor shaft will lift the conductive rod 302, and under the action of centrifugal force, the telescopic conductive rod 302 has a continuous retraction force, which reduces its conductivity to the weakest point. At this time, the voltage release is completely completed by the fixed conductive component 20.

[0083] The present invention also provides a conductive module, which includes an arc-shaped conductive module body, a fixed conductive element 20 and a telescopic conductive element 30; the fixed conductive element 20 and the telescopic conductive element 30 are disposed on the conductive module body, and the fixed conductive element 20 and the telescopic conductive element 30 extend freely from one of the inner side wall or the outer side wall of the conductive module body.

[0084] The structures of the telescopic conductive element 30 and the fixed conductive element 20 are consistent with those of the conductive elements in the embodiments described above. An accommodating space is provided on the conductive module, and the fixed conductive element 20 and the telescopic conductive element 30 can protrude from the inner wall surface 103 of the accommodating space. Specifically, the specific connection method of the telescopic conductive element 30 and the fixed conductive element 20 on the conductive module body can be referred to the specific connection method in the conductive ring described above.

[0085] It is understood that by incorporating retractable conductive elements on the conductive module, effective protection of the bearing can be achieved at low speeds when in conjunction with the motor. For specific details regarding bearing protection, please refer to the detailed protection process described in the conductive ring embodiment above.

[0086] The present invention also provides an electric motor, including an electric motor housing, an electric motor rotating part, and a conductive module as described above. The conductive module is electrically connected to the electric motor housing, and the free extension end of the telescopic conductive member 30 and the free extension end of the fixed conductive member 20 are respectively electrically connected to the electric motor rotating part.

[0087] In the above embodiment, the motor shaft is the rotating part of the motor, and the telescopic conductive member 30 and the fixed conductive member 20 are electrically connected to the motor shaft, so that the telescopic conductive member 30 can conduct at low speed to protect the bearing on the motor shaft.

[0088] The present invention also provides an electric motor, which includes a motor shaft and a housing, wherein a conductive ring is provided between the motor shaft and the housing, and the conductive ring is constructed as provided in any of the above embodiments.

[0089] Specifically, a motor bearing is connected to one end of the motor shaft, and a conductive ring of any of the above embodiments (Embodiment 1 or Embodiment 2) is installed near the motor bearing. After installation, the conductive ring makes good contact with the housing. When the motor shaft rotates, the telescopic conductive element 30 in the conductive ring can perform the functions described in the above embodiments, providing effective protection for the bearing.

[0090] The present invention also provides a device having at least one motor and a conductive module as mentioned in the above embodiments, wherein the motor can be the motor with a conductive ring as described in the above embodiments, or the motor with a conductive module as described in the above embodiments. Of course, some devices may include two or more motors. When a device has two or more motors, the motors may be at least one of the two types of motors described in the above embodiments, or a combination of two types of motors.

[0091] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment is provided with a telescopic conductive element 30. The telescopic conductive element 30 enables conduction with the motor shaft body at low speeds, allowing the shaft voltage to be released. Furthermore, at medium speeds, the telescopic conductive element 30 can work together with the fixed conductive element 20 to achieve stable conduction. Moreover, at high speeds, it can disengage from the motor shaft body, avoiding wear on the telescopic conductive element 30 due to high speeds and extending the service life of the conductive ring.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A conductive ring, characterized in that, include: The support part (10) is provided with an accommodating space (101) along the axial direction. The inner wall surface (103) of the accommodating space (101) is provided with a fixed conductive element (20) and a telescopic conductive element (30) in the circumferential direction, and the fixed conductive element (20) and the telescopic conductive element (30) protrude from the inner wall surface (103) of the accommodating space. The telescopic conductive component (30) includes a fixed base (301) and a conductive rod (302). The conductive rod (302) is slidably connected to the fixed base (301). The fixed base (301) is disposed in the mounting groove (104) of the support part (10). The mounting groove (104) is arranged radially along the support part (10). The telescopic conductive element (30) is slidably connected to the support part (10) so that the telescopic conductive element (30) can move radially along the support part (10); the telescopic conductive element (30) can achieve conduction with the motor shaft body when the motor shaft is at low speed, and release the shaft voltage through the telescopic conductive element (30); at medium speed, the telescopic conductive element (30) can work together with the fixed conductive element (20) to achieve stable conduction; at high speed, the telescopic conductive element (30) can disengage from the contact with the motor shaft body.

2. The conductive ring according to claim 1, characterized in that, The fixed conductive component (20) is fixedly disposed in the mounting groove (104), and the telescopic conductive component (30) is slidably connected to the mounting groove (104).

3. The conductive ring according to claim 1, characterized in that, The plurality of fixed conductive elements (20) and the plurality of telescopic conductive elements (30) are arranged on the same plane.

4. The conductive ring according to claim 2, characterized in that, The mounting base (301) is detachably installed in the mounting slot (104).

5. The conductive ring according to claim 1, characterized in that, The support (10) includes an inner shell (110) and an outer shell (120), and the inner shell (110) and the outer shell (120) are engaged.

6. The conductive ring according to claim 5, characterized in that, It also includes a retainer (40) for supporting the fixed conductive member (20) and the telescopic conductive member (30), the retainer (40) being disposed within the inner housing (110).

7. An electric motor, characterized in that, It includes a motor shaft and a housing, and a conductive ring as described in any one of claims 1-6 is provided between the motor shaft and the housing.

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