OMNIDIRECTIONAL SEGMENTAL RING IN HIGH CONDUCTIVITY ELASTICITY

Abstract

HIGH CONDUCTIVITY ELASTICITY OMNIDIRECTIONAL SEGMENTAL RING The present invention discloses a high conductivity elasticity omnidirectional segment ring which comprises an outer skeleton (1), a support ring (2) and a conduction assembly, the conduction assembly includes an electrically conductive ring (4), a plurality of lip edges (3), an electrically conductive silicone adhesive (12) after solidifying from a liquid state, and an elastic piece which adheres to the electrically conductive silicone adhesive (12) upon integration.For the high-conductivity elastic omnidirectional segment ring according to the present invention, it is possible to solve the problem that the corrosion of the surrounding parts caused by the axial current generated by the electric motor rotating at a high rotational speed affects the stability of the operating states of the accessories, and then affects the stability, reliability, and safety of the electric motor. Figure to be published with the abstract: Figure 5.

Description

Title of the invention: OMNIDIRECTIONAL SEGMENTAL RING IN HIGH CONDUCTIVITY ELASTICITY FIELD OF THE INVENTION

[0001] The present invention relates to the technical field of electric motor accessories, in particular an omnidirectional segment ring made of high-conductivity elasticity. TECHNICAL BACKGROUND

[0002] At present, there has been fierce competition in the EV (electric vehicle) market, and "three electric facilities" for EVs have been developed at a rapid stage, and several EV companies have gradually increased their R&D investments in electric motors, batteries and electronic controls, among which electric motors as the most important technology have become an object regarded as a barrier and difficulty to be overcome currently.

[0003] At present, an obstacle to the technology of VE engines is the power, torque and speed limits of electric motors, and for the currently achieved maximum power, it is difficult to exceed 400KW. Also for the maximum torque, it is difficult to exceed 800 Nm. Among these, a technical difficulty to overcome lies in the stability, reliability and safety of the motor shafts at high rotational speeds.

[0004] The existing problem we have experienced is that a current occurs at the motor spindle rotating at a high rotational speed due to the static and dynamic friction of various stators and rotors in an electric motor. In particular, an axial current occurring at an EV powertrain in high voltage of 800 V is particularly evident. The corrosion of surrounding parts caused by the axial current directly affects a stability of an operating state of a bearing sleeved on the spindle, and then affects the stability of the electric motor under the condition of high rotational speed, high power and high torque.The higher the power, the bigger the axial current and the more severe the danger, so most electrical machine manufacturers have to set an upper limit for the power; in fact, it is possible to increase an input power to increase the rotation speed of the electric motor, but the presence of the axial current also accelerates a 'wear and a . corrosion of dynamic parts in the electric motor, and directly reduces the life of the electric motor by half.

[0005] For this reason, in order to solve the axial current problem, several EV companies have deliberated, designed and demonstrated a variety of technical solutions, among which one solution that can currently be adopted is that a metal brush is configured at the position of the bearing, in order to conduct the currents generated by a spindle at a high rotational speed therefrom, and release the currents.However, the actual effect of current conduction through the wire brush must be limited by a water cooling means or an oil cooling means adopted in the electric motor, because the wire brush must play a role only under the condition of water or oil insulation; moreover, the wire brush itself must also cause the spindle to wear, and the bigger a pressing force is, the more it affects the spindle rotation speed; in addition, the wire brush must also cause the spindle to heat up quickly, which leads to the rise of the internal heat of the entire power unit, affecting the heat exchange of the power unit and causing unstable operating conditions.

[0006] Therefore, for EV motor technology, or various technical fields that require use of electric motors, it is necessary to solve the problem of how to release axial current as soon as possible and provide a technical solution that can neither cause wear and corrosion of a rotating spindle, nor affect a water cooling means or an oil cooling means for a stator and internal rotor. Summary of the invention

[0007] One of the objectives of the present invention is that, in order to solve the problem that the corrosion of the surrounding parts caused by the axial current generated by the electric motor rotating at a high rotational speed affects the stability of the operating states of the accessories such as a bearing sleeved on the spindle, and then affects the stability, reliability, and safety of the electric motor under conditions of high rotational speed, high power, and high torque, it is necessary to design an electric motor accessory capable of quickly conducting and releasing the axial current therefrom, not influencing the circulation of water or oil in the water or oil cooling system, and applying a small radial force to the outer circumference of the spindle while releasing the current in contact with the spindle,which greatly reduces the sliding friction and does not influence the spindle rotation speed, so as to effectively reduce the power consumption of the electric motor and ensure that the electric motor, can operate stably and safely, so that it is possible to confidently increase the power of the electric motor, and then release higher speed, power and torque from the EV electric motor.

[0008] In order to solve the above technical problem, we provide the following technical solution.

[0009] A high-conductivity elastic omnidirectional segment ring comprises an outer skeleton of a metal material, a support ring of a metal material, and a conduction assembly tightly pressed by the outer skeleton and the support ring, all of which are annular in shape and sleeve in clearance fit a pin, the conduction assembly includes an electrically conductive ring, a plurality of lip edges arranged along a circumference of the pin in a fan-shaped annular die, an electrically conductive silicone adhesive after solidifying from a liquid state so as to directly touch the circumference of the pin, and an elastic piece capable of conducting electricity which adheres to the electrically conductive silicone adhesive upon integration and moves in a radial direction of the pin.

[0010] Advantageously, the electrically conductive silicone adhesive fills the inside of the lip edge, so that the lip edge stabilizes a structure of the electrically conductive silicone adhesive, and a current conducted from the pin via the electrically conductive silicone adhesive can be conducted to the electrically conductive ring by the elastic member, and is released to the outside by the electrically conductive ring via the outer skeleton and / or the support ring.

[0011] Advantageously, an electrically conductive hole coordinated with the elastic member is opened on a peripheral surface of the lip edge, the elastic member penetrates through the electrically conductive hole, and an end of the inside of the elastic member adheres directly to and touches the electrically conductive silicone adhesive before solidifying from a liquid state filling the inside of a flow groove of the lip edge.and is formed with the electrically conductive silicone adhesive after solidifying from a liquid state upon integration.

[0012] Advantageously, one end of the exterior of the elastic part penetrates through an adjustment hole arranged on the electrically conductive ring,

[0013] Advantageously, an adjustable positioning pin is placed between the elastic piece and the electrically conductive ring, the positioning pin is arranged in the adjustment hole, the positioning pin adjusts an elastic pressing force of the elastic piece exerted on the electrically conductive silicone adhesive in a radial direction of the pin.

[0014] Advantageously, the positioning pin is capable of adapting to sizes of the diameters of the various pins and adjusting a contact pressure force.

[0015] Preferably, an outer contour of the outer skeleton fits tightly to a metal housing, an inner contour of the outer skeleton fits in a press fit to the support ring, allowing electrical conduction together and conducting a current to be released outwardly.

[0016] Preferably, inner contours of the lip edge and the electrically conductive silicone adhesive are each provided with a curved surface that contacts an outer contour of the pin, and the curved surface contacts the pin and maintains a clamping force (preferably light) to maintain electrical conduction.

[0017] Preferably, the lip edge is made of rubber or silicone.

[0018] Preferably, the elastic part is provided in the form of a metal spring, and the lip edge and the electrically conductive silicone adhesive can radially press the circumference of the pin under the elastic force of the metal spring so as to maintain electric conduction, and can also spring with the springs of the pin in a radial direction and move slightly with slight movements of the pin in an axial direction, even if the circumference of the pin is tapered, it is still possible to maintain omnidirectional stable contact and conduct axial current.

[0019] Preferably, the elastic piece is provided in the form of a metal guide rod, so as to increase the efficiency of electrical discharge to the outside via the electrically conductive silicone adhesive, the metal guide rod penetrates through a through hole in the middle of the positioning pin, and a spring further sleeves one end of the metal guide rod toward the positioning pin, so that the metal guide rod can slide in a radial direction.

[0020] The present invention has the following beneficial effects.

[0021] 1. For the omnidirectional segment ring in high conductivity elasticity According to the present invention, it is possible to solve the problem that the corrosion of the surrounding parts caused by the axial current generated by the electric motor rotating at a high rotational speed affects the stability of the working states of the accessories such as a bearing sleeved on the spindle, and then affects the stability, reliability, and safety of the electric motor under the condition of high rotational speed, high power, and high torque, and overcomes a difficulty of the advanced technologies that the power of the electric motor is limited, that is, a problem on the axial current that must be solved in a short time, otherwise there are potential safety hazards.

[0022] 2. The plurality of fan-shaped lip edges used in the present invention can 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 movement performance with the spindle, and ensuring good instant electrical contact performance between the electrically conductive silicone adhesive and the spindle.

[0023] 3. The positioning pin corresponding to the degree of tightening for screwing of the elastic piece is arranged in the electrically conductive ring, so that it is possible to freely adjust the strength of the electrically conductive silicone adhesive wrapping the pin, lower the sliding friction of the lip edge and the electrically conductive silicone adhesive on the circumference of the pin, reduce heat generation, decrease the damping of electric motors, save electric energy and extend the service life of electric vehicles.

[0024] 4. The electrically conductive silicone adhesive in liquid state is used to compensate for the defect such as large resistivity of traditional electrically conductive resin materials, so that it is possible to increase the electrically conductive contact area between the electrically conductive ring and the inner skeleton, facilitate the conduction of current to the outside, reduce the technical requirements for the electrically conductive resin materials of the electrically conductive ring, and reduce costs.

[0025] 5. By shortening the electrical conduction distance between the elastic part in the electrically conductive silicone adhesive after solidifying from a liquid state and the spindle, it is possible to quickly conduct and release the axial current, so that at the time of generating the axial current, it can be immediately conducted to the outside of the elastic part and released, thereby improving the running stability of high-power electric motors. BRIEF DESCRIPTIONS OF THE FIGURES

[0026] [Fig.l] shows a 3D view of the high conductivity elastic omnidirectional segment ring described in Example 1.

[0027] [Fig.2] shows a 3D view of the high conductivity elastic omnidirectional segmented ring without the support ring described in Example 1.

[0028] [Fig.3] shows a 3D view of the high-conductivity elastic omnidirectional segment ring without the support ring and the electrically conductive ring described in Example 1.

[0029] [Fig.4] shows a partial sectional view of the high conductivity elastic omnidirectional segment ring described in Example 1.

[0030] [Fig.5] shows a sectional view in AA on [Fig.4].

[0031] [Fig.6] shows a sectional view of the omnidirectional segment ring in high conductivity elasticity described in Example 2.

[0032] [Fig.7] shows a sectional view of the high conductivity elastic omnidirectional segment ring described in Example 3.

[0033] In these drawings:

[0034] 1-external skeleton; 2-support ring; 3-lip edge; 4-electrically- conductor;5-circulation groove;6-metal spring;7-curved surface;9-locating pin;12-electrically conductive silicone adhesive;14-clearance;15-electrically conductive hole;16-pin;17-metal guide rod;18-through hole. Statement of the invention

[0035] We will clearly and completely describe the technical solution of the present invention by presenting a plurality of embodiments in combination with the following figures. EXAMPLE 1

[0036] As shown in Figs. 1-5, this example discloses a high-conductivity elasticity omnidirectional segment ring which comprises an outer skeleton 1 made of a metal material, a support ring 2 made of a metal material and a conduction assembly tightly pressed by the outer skeleton 1 and the support ring 2, the conduction assembly includes an electrically conductive ring 4, eight lip edges 3 arranged along a circumference of a pin 16 in a fan-shaped annular die, an electrically conductive silicone adhesive 12 after solidifying from a liquid state so as to directly touch the circumference of the pin 16, and a metal spring 6 capable of conducting electricity which adheres to the electrically conductive silicone adhesive 12 upon integration and moves in a radial direction of the pin 16.

[0037] As shown in Figs. 4 and 5, the electrically conductive silicone adhesive 12 fills the inside of the lip edge 3, so that the lip edge 3 stabilizes a structure of the electrically conductive silicone adhesive 12, and the current conducted from the pin 16 via the electrically conductive silicone adhesive 12 can be conducted to the electrically conductive ring 4 by the metal spring 6, and is released to the outside by the electrically conductive ring 4 via the outer skeleton 1 and / or the support ring 2.

[0038] As shown in Figs. 2 and 3, the outer skeleton 1, the support ring 2 and the electrically conductive ring 4 are all annular in shape and sleeve in clearance fit 14 the high-speed spindle 16, an electrically conductive hole 15 coordinated with the metal spring 6 is opened on a peripheral surface of the lip edge 3, the metal spring 6 penetrates through the electrically conductive hole 15, and one end of the inside of the metal spring 6 directly adheres to and touches the electrically conductive silicone adhesive 12 before solidifying from a liquid state filling the interior of a circulation groove 5 of the lip edge 3, and is formed with the electrically conductive silicone adhesive 12 after solidifying from a liquid state upon integration.

[0039] As shown in [Fig.5], one end of the outside of the metal spring 6 penetrates through an adjustment hole provided on the electrically conductive ring 4, an adjustable positioning pin 9 is placed between the metal spring 6 and the electrically conductive ring 4, the positioning pin 9 is connected with the adjustment hole by thread, the positioning pin 9 adjusts an elastic pressing force of the metal spring 6 exerted on the electrically conductive silicone adhesive 12 in a radial direction of the pin 16, and the positioning pin 9 is capable of adapting to sizes of the diameters of the various pins 16 and adjusting a contact pressing force.

[0040] As shown in [Fig.5], an outer contour of the outer skeleton 1 fits tightly to a metal housing, an inner contour of the outer skeleton 1 fits in a force fit to the support ring 2, allowing electrical conduction together and leading a current to be released outwardly.

[0041] As shown in Figs. 3 and 5, inner contours of the lip edge 3 and the electrically conductive silicone adhesive 12 are all provided with a curved surface 7 which touches an outer contour of the pin 16, and the curved surface 7 touches the pin 16 and keeps a light clamping force to maintain electrical conduction.

[0042] In a preferred example, the lip edge 3 is made of rubber or silicone.

[0043] In a preferred example, the lip edge 3 and the electrically-silicone adhesive conductor 12 can radially press the circumference of the pin 16 under the elastic force of the metal spring 6 so as to maintain electric conduction, spring with the springs of the pin 16 in a radial direction and move slightly with slight movements of the pin 16 in an axial direction, even if the circumference of the pin 16 is tapered, it is still possible to maintain omnidirectional stable contact and conduct axial current. EXAMPLE 2

[0044] As shown in [Fig.6], this example discloses a high-conductivity elasticity omnidirectional segment ring which comprises an outer skeleton 1 of metal material, a support ring 2 of metal material and a conduction assembly tightly pressed by the outer skeleton 1 and the support ring 2, the conduction assembly includes an electrically conductive ring 4, eight lip edges 3 arranged along a circumference of a pin 16 in a fan-shaped annular die, an electrically conductive silicone adhesive 12 after having solidified from a liquid state so as to directly touch the circumference of the pin 16, and a metal spring 6 capable of conducting electricity which adheres to the electrically conductive silicone adhesive 12 upon integration and moves in a radial direction of the pin 16. Example 2 differs from Example 1 in that the peripheral surface of the lip edge 3 is formed with the metal spring 6 upon integration, instead of being provided with an electrically conductive hole 15 coordinated with the metal spring 6, and one end of the inside of the metal spring 6 directly adheres to the electrically conductive silicone adhesive 12 and is formed with the electrically conductive silicone adhesive 12 after having solidified from a liquid state upon integration.The advantage of this implementation is that: the metal spring 6 is more firmly bonded with the lip edge structure 3, and one end of the inside of the metal spring 6 will not be formed with the through hole at the integration like Example 1, so that it is possible for the metal spring 6 to reduce the vibration caused by the high-frequency jump in a radial direction of the spindle, thus it is possible to decrease the fragments coming from the electrically conductive silicone adhesive 12 after solidifying into a liquid state, and ensuring the stability and safety of the external environment of the spindle 16 of the electric motor. EXAMPLE 3

[0045] As shown in [Fig.7], this example discloses a high-conductivity elasticity omnidirectional segment ring which comprises an outer skeleton 1 of a metal material, a support ring 2 of a metal material and a conduction assembly tightly pressed by the outer skeleton 1 and the support ring 2, the conduction assembly includes an electrically conductive ring 4, eight lip edges 3 arranged along a circumference of a pin 16 in a fan-shaped annular die, an electrically conductive silicone adhesive 12 after solidifying from a liquid state so as to directly touch the circumference of the pin 16, and a metal spring 6 capable of conducting electricity which adheres to the electrically conductive silicone adhesive 12 upon integration and moves in a radial direction of the pin 16.Example 3 differs from Example 1 in that the elastic part is provided in the form of a metal guide rod 17, so as to increase the efficiency of electrical discharge to the outside via the electrically conductive silicone adhesive 12, the metal guide rod 17 penetrates through a through hole 18 in the middle of the positioning pin 9, and a spring further sleeves one end of the metal guide rod 17 toward the positioning pin 9. The advantage of this implementation is that: the metal guide rod 17 can slide in a radial direction and keep a pressure. on the electrically conductive silicone adhesive 12 so that the electrically conductive silicone adhesive 12 tightly envelops the pin 16 at high speed.

[0046] Embodiments of the present invention have been described in detail above in combination with the figures, but the present invention is not limited to the aforementioned embodiments, and a person skilled in the art may also make various changes, modifications, substitutions and variations without departing from the scope of the present invention.

Claims

Claims

1. An omnidirectional segment ring of high conductivity elasticity, comprising an outer skeleton (1) of a metal material, a support ring (2) of a metal material and a conduction assembly tightly pressed by said outer skeleton (1) and said support ring (2), which are all annular in shape and sleeve in clearance fit a pin (16), characterized in that said conduction assembly includes an electrically conductive ring (4), a plurality of lip edges (3) arranged along a circumference of the pin (16) in a fan-shaped annular die, an electrically conductive silicone adhesive (12) after solidifying from a liquid state so as to directly touch the circumference of the pin (16), and an elastic piece capable of conducting electricity which adheres to said electrically conductive silicone adhesive (12) upon integration and moves in a radial direction of the pin (16).

2. An omnidirectional segment ring of high-conductivity elasticity according to claim 1, characterized in that said electrically conductive silicone adhesive (12) fills the inside of said lip edge (3), so that said lip edge (3) stabilizes a structure of said electrically conductive silicone adhesive (12), and a current conducted from the pin (16) via said electrically conductive silicone adhesive (12) can be conducted to said electrically conductive ring (4) by said elastic piece, and is released to the outside by said electrically conductive ring (4) via said outer skeleton (1) and / or said support ring (2).

3. A high-conductivity elastic omnidirectional segment ring according to claim 2, characterized in that inner contours of said lip edge (3) and said electrically conductive silicone adhesive (12) are all provided with a curved surface (7) which touches an outer contour of the pin (16), and said curved surface (7) touches the pin (16) and keeps a clamping force to maintain electrical conduction.

4. Omnidirectional segment ring in high conductivity elasticity according to claim 3, characterized in that an electrically conductive hole (15) coordinated with said elastic piece is opened on a peripheral surface of said lip edge (3), said elastic piece penetrates through said electrically conductive hole (15), and one end of the inside of said elastic piece directly adheres to and touches said electrically conductive silicone adhesive (12) before solidifying from a liquid state filling the inside of a circulation groove (5) of said lip edge (3), and is formed with said electrically conductive silicone adhesive (12) after solidifying from a liquid state upon integration.

5. A high-conductivity elastic omnidirectional segment ring according to claim 4, characterized in that one end of the outside of said elastic piece penetrates through an adjustment hole provided on said electrically conductive ring (4).

6. A high-conductivity elastic omnidirectional segment ring according to claim 5, characterized in that an adjustable positioning pin (9) is placed between said elastic piece and said electrically conductive ring (4), said positioning pin (9) is disposed in said adjustment hole, and said positioning pin (9) adjusts an elastic pressing force of said elastic piece exerted on said electrically conductive silicone adhesive (12) in a radial direction of the pin (16).

7. An omnidirectional segment ring of high conductivity elasticity according to claim 4, characterized in that said elastic piece is provided in the form of a metal spring (6), and said lip edge (3) and said electrically conductive silicone adhesive (12) can radially press on the circumference of the pin (16) under the elastic force of said metal spring (6) so as to maintain electrical conduction.

8. A high-conductivity elastic omnidirectional segment ring according to claim 6, characterized in that said elastic piece is provided in the form of a metal guide rod (17), said metal guide rod (17) penetrates through a through hole in the middle of said positioning pin (9), and a spring further sleeves one end of the metal guide rod (17) toward said positioning pin (9).

9. A high conductivity elastic omnidirectional segment ring according to claim 1, characterized in that an outer contour of said outer skeleton (1) fits tightly to a metal housing, an inner contour of said outer skeleton (1) fits in a forced fit to said support ring (2), allowing electrical conduction together and leading a current to be released outwardly.

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