Highly conductive segmented ring of an all-directional elastic member

Abstract

The present invention discloses a highly conductive split ring of an omnidirectional elastic member. The highly conductive split ring of an omnidirectional elastic member according to the present invention solves the problem of corrosion of peripheral components caused by axial current in high-speed electric motors, which directly affects the operating stability of bearings mounted on the main shaft, thereby affecting the stability of the electric motor under conditions of high rotational speed, high power, and high torque. It also overcomes the state-of-the-art technical challenge of limiting the output of the electric motor, which belongs to the problem of axial current that needs to be resolved quickly, otherwise it may cause a potential safety hazard. The multiple fan-shaped lip edges used in the present invention not only ensure good electrical contact and sufficient contact area with the main shaft, but also move synchronously with the radial or axial movement of the main shaft, demonstrating excellent performance in following the main shaft operation and ensuring good instantaneous electrical contact between the conductive silicone adhesive and the main shaft. [Solution] The split ring comprises an outer frame, a support ring, and a conductive assembly, and the conductive assembly includes a conductive ring, multiple lip edges, a conductive silicone adhesive after it has solidified from a liquid state, and a conductive elastic member that is integrally attached to the conductive silicone adhesive.

Description

Technical Field

[0001] The present invention relates to the technical field of motor parts, and particularly to a highly conductive split ring of an all-directional elastic member.

Background Art

[0002] Currently, fierce competition is unfolding in the EV market. The "three electrics" for EVs are being rapidly developed, and many EV companies are gradually increasing their R & D investments in electric machines, batteries, and electronic controls. Among them, the electric machine, which is the most important technology, has become an issue to be overcome at present.

[0003] Currently, the obstacles to EV electric machine technology lie in the limitations of the output, torque, and speed of the electric machine. The maximum output currently achievable is difficult to exceed 400KW, and the maximum torque is also difficult to exceed 800 Nm. Among them, the technical difficulties that need to be overcome are the stability, reliability, and safety of the electric machine spindle at high speeds.

[0004] The existing problems we know are that axial current occurs in the electric machine spindle at high speeds due to the static and dynamic friction between various stators and rotors in the electric machine. In particular, the axial current generated in the 800V high-voltage EV power train is particularly prominent. The corrosion of peripheral components caused by the axial current directly affects the stability of the operating state of the bearings fitted on the spindle, and then affects the stability of the electric machine under conditions of high rotational speed, high output, and high torque. The higher the output, the greater the axial current and the more serious the danger. Therefore, most electromechanical manufacturers have no choice but to set an upper limit for the output. In fact, although it is possible to further increase the input power to increase the rotational speed of the electric machine, when axial current occurs, the wear and corrosion of dynamic components in the electric machine also accelerate, directly shortening the electric machine life by half.

[0005] Therefore, to solve the axial current problem, many EV companies have considered, designed, and demonstrated various technical solutions. One possible solution currently being adopted involves placing metal electric brushes at the bearing location to conduct and discharge the current generated by the spindle at high rotational speeds. However, the actual effect of conducting current through the metal electric brushes is limited by the water or oil cooling means employed in the electric motor, so the metal electric brushes only need to function under the condition that they are isolated from water or oil. Furthermore, the metal electric brushes themselves cause wear on the spindle, and the greater the contact pressure, the greater the impact on the spindle's rotational speed. In addition, the metal electric brushes rapidly heat the spindle, increasing the internal heat of the entire electric motor's powertrain, affecting the heat exchange of the powertrain, and causing unstable operating conditions.

[0006] Therefore, in EV electrical technology, or in various technological fields where electrical equipment is needed, it is necessary to provide a technical solution that solves the problem of releasing axial current as quickly as possible without causing wear or corrosion on the spindle and affecting the water cooling or oil cooling means of the internal stator and rotor. [Overview of the project] [Problems that the invention aims to solve]

[0007] The present invention aims to solve the problem that corrosion of surrounding parts caused by axial current in high-speed electric machinery directly affects the stability of the operating state of bearings fitted to the main shaft, and subsequently affects the stability of the electric machinery under conditions of high rotational speed, high output, and high torque. To this end, the invention designs an electric component that can rapidly conduct and discharge axial current without affecting the circulation of water or oil in a water-cooling or oil-cooling system, and applies a small radial force to the outer circumference of the main shaft that does not affect the rotational speed of the main shaft by greatly reducing sliding friction while discharging current in contact with the main shaft, thereby effectively reducing the energy consumption of the electric machinery, ensuring that the electric machinery operates stably and safely, allowing for reliable increases in electric output, and ultimately enabling high rotational speed, output, and torque to be generated from EV electric machinery. [Means for solving the problem]

[0008] To address the technical issues described above, we offer the following technical solutions: The highly conductive segmented ring of the omnidirectional elastic member comprises an outer frame made of a metallic material, a support ring made of a metallic material, and a conductive assembly firmly pressed by the outer frame and the support ring, wherein the conductive assembly includes a conductive ring, a plurality of lip-shaped portions arranged in a fan-shaped annular arrangement along the outer edge of the main shaft, a conductive silicone adhesive that comes into direct contact with the outer edge of the main shaft after solidifying from a liquid state, and a conductive elastic member that adheres integrally to the conductive silicone adhesive and can move along the radial direction of the main shaft.

[0009] The conductive silicone adhesive is placed inside the lip rim, the lip rim stabilizes the structure of the conductive silicone adhesive, and the elastic member conducts the current transmitted from the main shaft through the conductive silicone adhesive to the conductive ring, and releases it outward along the outer frame and the support ring through the conductive ring.

[0010] The outer frame, the support ring, and the conductive ring are all annular in shape and fitted into the high-speed rotating main shaft with a gap. The conductive hole into which the elastic member is fitted is opened on the outer edge surface of the lip rim. The elastic member passes through the conductive hole, and one inner end of the elastic member enters the circulation groove of the lip rim and directly adheres to and contacts the conductive silicone adhesive before it solidifies from a liquid state, becoming one with the conductive silicone adhesive after it solidifies from a liquid state.

[0011] One outer end of the elastic member passes through the adjustment hole located on the conductive ring.

[0012] An adjustable positioning pin is positioned between the elastic member and the conductive ring, the positioning pin is provided in the adjustment hole, and the positioning pin adjusts the compressive elastic force of the elastic member against the conductive silicone adhesive along the radial direction of the main shaft, and the positioning pin can adapt to various radii of the main shaft and adjust the contact pressure.

[0013] Preferably, the outer contour of the outer frame is in close contact with the metal housing, and the inner contour of the outer frame is fitted with the support ring in an interference fit to conduct electricity together, conducting current and discharging it to the outside.

[0014] Preferably, the inner contours of the lip edge and the conductive silicone adhesive both have an arc-shaped curved surface that contacts the outer contour of the main shaft, and the arc-shaped curved surface contacts the main shaft and maintains a slight clamping force to maintain electrical conductivity.

[0015] Preferably, the lip rim is made of rubber or silicone.

[0016] Preferably, the elastic member is provided as a metal spring, and the lip edge and the conductive silicone adhesive may push the outer edge of the main shaft radially under the elastic force of the metal spring to maintain electrical conductivity, and may bounce radially with the rebound of the main shaft, or move slightly with the slight movement of the main shaft along the axial direction, so that even if the outer edge of the main shaft is conical, it can make stable contact with the main shaft in all directions and conduct axial current.

[0017] Preferably, the elastic member is provided as a metal guide rod via the conductive silicone adhesive to enhance the discharge efficiency outward, the metal guide rod passes through a through hole in the center of the positioning pin, and a spring is further fitted to one end of the metal guide rod facing the positioning pin so that the metal guide rod can slide radially. [Effects of the Invention]

[0018] The present invention has the following beneficial effects. 1. The highly conductive segmented ring of the omnidirectional elastic member according to the present invention solves the problem in which corrosion of surrounding parts caused by axial current in high-speed electrical machinery directly affects the stability of the operating state of the bearing fitted to the main shaft, and subsequently affects the stability of the electrical machinery under conditions of high rotational speed, high output, and high torque, overcomes the cutting edge technical challenge of having to limit the output of the electrical machinery, and belongs to the problem of axial current that needs to be solved in a short time, otherwise it may cause a potential safety hazard. 2. The multiple fan-shaped lip portions used in the present invention not only ensure good electrical contact and sufficient contact area with the spindle, but also move synchronously in accordance with the radial or axial movement of the spindle, exhibiting excellent performance in following the spindle, and ensuring good instantaneous electrical contact performance between the conductive silicone adhesive and the spindle. 3. Positioning pins, positioned within the conductive ring according to the airtightness required for screwing in the elastic member, allow for free adjustment of the strength of the conductive silicone adhesive surrounding the main shaft, reduce sliding friction between the lip portion and the conductive silicone adhesive against the outer edge of the main shaft, reduce heat generation, lower electrical attenuation, conserve electrical energy, and extend the lifespan of applications in electric vehicles. 4. Liquid conductive silicone adhesives, used to compensate for the high resistivity defect of conventional conductive resin materials, can increase the conductive contact area between the conductive ring and the inner framework, thereby facilitating current conduction, reducing the technical requirements for the conductive resin material of the conductive ring, and lowering costs. 5. By minimizing the electrical conduction distance between the conductive silicone adhesive after it has solidified from a liquid state and the main shaft, axial current can be rapidly conducted and released, and as soon as axial current is generated, it can be conducted outward from the elastic member, thereby improving the operational stability of the electrical machine at high power. [Brief explanation of the drawing]

[0019] [Figure 1] This shows a three-dimensional view of the highly conductive segmented ring of the omnidirectional elastic member from Example 1. [Figure 2]The perspective view of the highly conductive split ring of the omnidirectional elastic member of Example 1 excluding the support ring is shown. [Figure 3] The perspective view of the highly conductive split ring of the omnidirectional elastic member of Example 1 excluding the conductive ring and the support ring is shown. [Figure 4] The partial cross-sectional view of the highly conductive split ring of the omnidirectional elastic member of Example 1 is shown. [Figure 5] The cross-sectional view taken along A-A of FIG. 4 is shown. [Figure 6] The cross-sectional view of the highly conductive split ring of the omnidirectional elastic member of Example 2 is shown. [Figure 7] The cross-sectional view of the highly conductive split ring of the omnidirectional elastic member of Example 3 is shown.

Embodiments for Carrying out the Invention

[0020] We will clearly and completely explain the technical solution of the present invention in combination with the following drawings by listing a plurality of embodiments.

[0021] Example 1 As shown in FIGS. 1-5, the highly conductive split ring of the omnidirectional elastic member disclosed in this example includes an outer framework 1 made of a metal material, a support ring 2 made of a metal material, and a conductive aggregate firmly pressed by the outer framework 1 and the support ring 2. The conductive aggregate includes a conductive ring 4, eight lip portions 3 arranged in a fan-shaped ring along the outer edge of the main axis 16, a conductive silicone adhesive 12 that directly contacts the outer edge of the main axis 16 after solidifying from a liquid state, and a conductive metal spring 6 that is integrally attached to the conductive silicone adhesive 12 and can move along the radial direction of the main axis 16.

[0022] As shown in FIGS. 4 and 5, the conductive silicone adhesive 12 is placed inside the lip portion 3. The lip portion 3 stabilizes the structure of the conductive silicone adhesive 12. The metal spring 6 conducts the current conducted from the main axis 16 through the conductive silicone adhesive 12 to the conductive ring 4 and discharges it outward along the outer framework 1 and the support ring 2 through the conductive ring 4.

[0023] As shown in Figures 2 and 3, the outer frame 1, the support ring 2, and the conductive ring 4 are all annular in shape and fitted onto the high-speed rotating main shaft 6 with a gap 14. The conductive hole 15 into which the metal spring 6 is fitted is opened on the outer edge surface of the lip edge 3. The metal spring 6 passes through the conductive hole 15, and one inner end of the metal spring 6 enters the circulation groove 5 of the lip edge 3 and directly adheres to and contacts the conductive silicone adhesive 12 before it solidifies from a liquid state, becoming one with the conductive silicone adhesive 12 after it has solidified from a liquid state.

[0024] As shown in Figure 5, one outer end of the metal spring 6 passes through an adjustment hole located on the conductive ring 4; an adjustable positioning pin 9 is positioned between the metal spring 6 and the conductive ring 4, and the positioning pin 9 is screwed into the adjustment hole. The positioning pin 9 adjusts the compressive elastic force of the metal spring 6 against the conductive silicone adhesive 12 along the radial direction of the spindle 16, and the positioning pin 9 can adapt to various radii of the spindle and adjust the contact pressure.

[0025] As shown in Figure 5, the outer contour of the outer frame 1 is in close contact with the metal housing, and the inner contour of the outer frame 1 is fitted with the support ring 2 in an interference fit, creating electrical conductivity together and conducting current to discharge to the outside.

[0026] As shown in Figures 3 and 5, the inner contours of the lip edge 3 and the conductive silicone adhesive 12 both have an arc-shaped curved surface 7 that contacts the outer contour of the main shaft 16. The arc-shaped curved surface 7 contacts the main shaft 16 and maintains a slight clamping force to preserve electrical conductivity.

[0027] In a preferred implementation, the lip edge portion 3 is made of rubber or silicone.

[0028] In a preferred implementation, the lip rim 3 and the conductive silicone adhesive 12 may press radially against the outer edge of the spindle 16 under the elastic force of the metal spring 6 to maintain electrical conductivity, and may bounce radially with the rebound of the spindle 16 or move slightly with slight axial movement of the spindle 16, so that even if the outer edge of the spindle 16 is conical, it can make stable contact with the spindle 16 in all directions and conduct axial current.

[0029] Example 2 As shown in Figure 6, the highly conductive segmented ring of the omnidirectional elastic member disclosed in this embodiment comprises an outer frame 1 made of a metal material, a support ring 2 made of a metal material, and a conductive assembly firmly pressed by the outer frame 1 and the support ring 2, the conductive assembly including a conductive ring 4, eight lip portions 3 arranged in a fan-shaped annular arrangement along the outer edge of the main shaft 16, a conductive silicone adhesive 12 that comes into direct contact with the outer edge of the main shaft 16 after solidifying from a liquid state, and a conductive metal spring 6 that adheres integrally to the conductive silicone adhesive 12 and can move along the radial direction of the main shaft 16. Embodiment 2 differs from Embodiment 1 in the following respects: The outer edge surface of the lip portion 3 is integrated with the metal spring 6 instead of having a conductive hole 15 for fitting the metal spring 6, and one inner end of the metal spring 6 adheres directly to and comes into contact with the conductive silicone adhesive 12 before it solidifies from a liquid state, and becomes integrated with the conductive silicone adhesive 12 after it solidifies from a liquid state. The advantages of this embodiment are as follows. The metal spring 6 is more firmly connected to the lip edge 3, and one inner end of the metal spring 6 does not become integrated with the through hole as in Example 1. Therefore, the metal spring 6 reduces vibration under the action of high-frequency rebound along the radial direction of the spindle, thereby reducing debris originating from the conductive silicone adhesive 12 after it has solidified from its liquid state, and potentially ensuring the stability and safety of the spindle 16 of the electric machine in the external environment.

[0030] Example 3 As shown in Figure 7, the highly conductive segmented ring of the omnidirectional elastic member disclosed in this embodiment comprises an outer frame 1 made of a metal material, a support ring 2 made of a metal material, and a conductive assembly firmly pressed by the outer frame 1 and the support ring 2, wherein the conductive assembly includes a conductive ring 4, eight lip portions 3 arranged in a fan-shaped annular arrangement along the outer edge of the main shaft 16, a conductive silicone adhesive 12 that, after solidifying from a liquid state, directly contacts the outer edge of the main shaft 16, and a conductive metal spring 6 that adheres integrally to the conductive silicone adhesive 12 and can move along the radial direction of the main shaft 16. Embodiment 2 differs from Embodiment 1 in the following respects. The elastic member is provided as a metal guide rod 17 to enhance the discharge efficiency outward via the conductive silicone adhesive 12, the metal guide rod 17 passes through a through hole 18 in the center of the positioning pin 9, and a spring is further fitted to one end of the metal guide rod 17 facing the positioning pin 9. The advantages of this embodiment are as follows. The metal guide rod 17 slides radially, maintaining pressure on the conductive silicone adhesive 12 and ensuring that the conductive silicone adhesive 12 tightly encases the main shaft 16.

[0031] Embodiments of the present invention have been described in detail above in conjunction with the drawings, but the present invention is not limited to the embodiments described above, and those skilled in the art can make various changes, modifications, substitutions and variations without departing from the spirit of the invention. Furthermore, the scope of the present invention is limited by the appended claims and their equivalents. [Explanation of symbols]

[0032] 1-Outer frame; 2-Support ring; 3-Lip rim; 4-Conductive ring; 5-Circulation groove; 6-Metal spring; 7-Arch curved surface; 9-Positioning pin; 12-Conductive silicone adhesive; 14-Gap; 15-Conductive hole; 16-Main shaft; 17-Metal guide rod; 18-Through hole.

Claims

1. A highly conductive segmented ring of an omnidirectional elastic member comprising an outer frame made of a metal material, a support ring made of a metal material, and a conductive assembly firmly pressed by the outer frame and the support ring, wherein the outer frame, the support ring and the conductive assembly are all annular in shape and fitted onto a main shaft with a gap, The conductive assembly includes a conductive ring, a plurality of lip-shaped portions arranged in a fan-shaped annular pattern along the outer edge of the main shaft, a conductive silicone adhesive that is in direct contact with the outer edge of the main shaft, and a conductive elastic member that is integrally attached to the conductive silicone adhesive and can move along the radial direction of the main shaft. The conductive silicone adhesive is placed inside the lip rim, the lip rim stabilizes the structure of the conductive silicone adhesive, and the elastic member conducts the current transmitted from the main shaft through the conductive silicone adhesive to the conductive ring, and releases it outward along the outer frame and the support ring through the conductive ring. The inner contours of the lip edge and the conductive silicone adhesive both have arc-shaped curved surfaces that contact the outer contour of the main shaft, and the arc-shaped curved surfaces contact the main shaft, maintaining a clamping force to preserve electrical conductivity. A conductive hole into which the elastic member is fitted is opened on the outer edge surface of the lip edge, the elastic member passes through the conductive hole, one inner end of the elastic member enters the circulation groove of the lip edge, and directly adheres to and contacts the conductive silicone adhesive, thereby becoming one unit. One outer end of the elastic member passes through the adjustment hole located on the conductive ring, An adjustable positioning pin is positioned between the elastic member and the conductive ring, the positioning pin is provided in the adjustment hole, and the positioning pin adjusts the compressive elastic force of the elastic member against the conductive silicone adhesive along the radial direction of the principal axis. The elastic member is provided as a metal guide rod, the metal guide rod passes through a through hole in the center of the positioning pin, and a spring is further fitted to one end of the metal guide rod facing the positioning pin. A highly conductive segmented ring of an omnidirectional elastic member, characterized by its features.

2. The elastic member is provided as a metal spring, and the lip edge and the conductive silicone adhesive press radially against the outer edge of the main shaft under the elastic force of the metal spring so as to maintain electrical conductivity. A highly conductive segmented ring of an omnidirectional elastic member as described in claim 1.

3. The outer contour of the outer frame is in close contact with the metal housing, and the inner contour of the outer frame is fitted to the support ring in an interference fit, thereby conducting electricity together and discharging current to the outside. A highly conductive segmented ring of an omnidirectional elastic member as described in claim 1.

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