Single-channel high-speed rotary connector with shielding structure

Abstract

The utility model discloses a single -channel high -speed rotary connector with shielding structure, including stator casing, with stator casing coaxial and rotatory connection's rotor casing, stator casing center is equipped with first conductor, and rotor casing center is equipped with second conductor, and first conductor is inserted with second conductor and is arranged, be equipped with the shielding piece in the stator casing, and the shielding piece coaxially covers and is equipped outside first conductor, and the one end of shielding piece is close to rotor casing is claw type structure, and claw type structure includes a plurality of elastic sheet of arranging in the circumferential interval, and each elastic sheet opens outward along the radial in natural state, and the outer surface of elastic sheet is equipped with arc convex, and arc convex and rotor casing inner wall elasticity abut. Through the elastic deformation of elastic sheet, make shielding piece always with rotor casing keep reliable electrically conductive contact in the rotation process, to form continuous stable electromagnetic shielding path, reduce the signal interference under high -speed rotation condition.

Description

Technical Field

[0001] This utility model belongs to the field of rotary connector technology, specifically relating to a single-channel high-speed rotary connector with a shielding structure. Background Technology

[0002] Rotary connectors are widely used in devices that require electrical connections or signal transmission between stationary and rotating components, such as high-speed turntables, detection equipment, radar shafts, robot end effectors, winding devices, and other applications requiring continuous rotational signal transmission. For high-speed rotary connectors, they typically need to simultaneously meet requirements such as stable conductivity, smooth rotation, low signal interference, and long-term reliable operation within a limited installation space. As the rotational speed of related equipment increases, the internal conductors, housing, and contact structures of the connector are more susceptible to vibration, eccentricity, assembly errors, and wear during rotation, thus placing higher demands on signal transmission stability.

[0003] Existing single-channel rotary connectors typically achieve electrical connection between the stator and rotor sides through conductor mating, sliding contact, or elastic contact. To reduce the impact of external electromagnetic interference on signal transmission, some rotary connectors have shielding sleeves or housings on the outside of the conductors. However, under high-speed rotation conditions, it is often difficult to maintain stable conductive contact between the fixed-side shielding structure and the rotating-side housing. If the shielding component and the rotating housing only use clearance fit, end-face contact, or ordinary cylindrical contact structure, then when the rotor housing rotates at high speed, factors such as radial runout, axial movement, machining tolerances, assembly eccentricity, or long-term wear may cause problems such as discontinuous contact, insufficient contact pressure, or partial detachment between the shielding component and the rotor housing.

[0004] If the contact between the shield and the rotor housing is unstable, the shielding path inside the connector will be difficult to maintain continuity, which can easily lead to a decrease in shielding effectiveness. Especially when transmitting weak or high-frequency signals at high speeds, discontinuities in the shielding structure can make it easier for external electromagnetic interference to couple to the conductor transmission path. It may also cause interference generated by the signal inside the connector to spread outward, resulting in increased signal noise, reduced transmission stability, or even distortion of detection results. Utility Model Content

[0005] To address the aforementioned issues, this invention provides a single-channel high-speed rotary connector with a shielded structure. This connector is compact, suitable for high-speed rotation conditions, and enables the shield to maintain reliable contact with the rotor housing during rotation.

[0006] The technical solution provided by this utility model is as follows: A single-channel high-speed rotary connector with a shielded structure includes a stator housing and a rotor housing coaxial with and rotatably connected to the stator housing. A first conductor is passed through the center of the stator housing, and a second conductor is passed through the center of the rotor housing. The first conductor and the second conductor are plugged into each other. The stator housing is equipped with a shielding component, which is coaxially sleeved on the outside of the first conductor. The end of the shielding component near the rotor housing has a claw-shaped structure, which includes several spring pieces arranged circumferentially. Each spring piece opens radially outward in its natural state. The outer surface of each spring piece is provided with an arc-shaped protrusion, which elastically abuts against the inner wall of the rotor housing to keep the shielding component in conductive contact with the rotor housing.

[0007] In some embodiments, the shielding element is a hollow cylindrical structure, and the first conductor passes through the hollow cavity of the shielding element.

[0008] In some embodiments, a first connector is provided at one end of the stator housing, the first connector is screwed onto the inner wall of the stator housing, a boss is provided on the inner wall of the stator housing, and a flange is provided at the end of the shield away from the rotor housing, the flange is engaged between the inner end of the first connector and the boss.

[0009] In some embodiments, a first clamp is fixed to the inner wall of the first connector, and the first conductor passes through the first clamp to the center of the stator housing; a second connector is provided at one end of the rotor housing, a second clamp is fixed to the inner wall of the second connector, and the second conductor passes through the second clamp to the center of the rotor housing.

[0010] In some implementations, the inner wall of the stator housing is fixed to the outer ring of the bearing, and the inner ring of the bearing is fixed to the outer wall of the rotor housing.

[0011] In some embodiments, a deep groove is formed on the side of the first conductor near the second conductor, and a friction element is provided in the deep groove by means of a spring. The end of the second conductor is inserted into the deep groove and makes rotatable frictional contact with the end of the friction element.

[0012] In some embodiments, the end of the friction element near the second conductor is a spherical structure, and the other end is a planar structure. The shape of the contact end between the second conductor and the friction element matches the shape of the friction element. One end of the spring is fixed to the bottom of the deep groove, and the other end is fixed to the planar end of the friction element.

[0013] In some implementations, the friction element is made of gold-plated copper.

[0014] In some implementations, a flange is provided on the outer wall of the stator housing.

[0015] In summary, the beneficial effects of this utility model are as follows: This invention provides a shielding component coaxially sleeved on the outside of the first conductor within the stator housing. The end of the shielding component near the rotor housing is configured as a claw-shaped structure, allowing several circumferentially spaced spring pieces to open radially outward in their natural state. Simultaneously, an arc-shaped protrusion is provided on the outer surface of each spring piece, elastically contacting the inner wall of the rotor housing. This allows the shielding component to continuously compensate for contact changes caused by assembly eccentricity, radial runout, and machining tolerances during high-speed rotation of the rotor housing, ensuring reliable conductive contact between the arc-shaped protrusion and the inner wall of the rotor housing. This guarantees a continuous and stable electromagnetic shielding path between the stator-side shielding component and the rotating-side rotor housing, effectively reducing signal interference under high-speed rotation conditions and improving the signal transmission stability and reliability of the high-speed rotating connector. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of the present invention. Figure 2 This is a schematic diagram of the shielding component structure of this utility model.

[0017] The attached figures are labeled as follows: 1. Stator housing; 2. Rotor housing; 3. First conductor; 4. Second conductor; 5. Spring; 6. Friction component; 7. Bearing; 8. First connector; 9. First clamp; 10. Second connector; 11. Second clamp; 12. Shielding component; 13. Boss; 14. Flange; 121. Flange; 122. Spring; 123. Arc-shaped protrusion. Detailed Implementation

[0018] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0019] like Figures 1-2 As shown, this utility model provides a single-channel high-speed rotary connector with a shielded structure, including a stator housing 1 and a rotor housing 2 coaxially arranged with the stator housing 1 and capable of relative rotation. The stator housing 1 and the rotor housing 2 are integrally coaxial cylindrical structures, with the stator housing 1 serving as the fixed side structure and the rotor housing 2 serving as the rotating side structure. A first conductor 3 passes through the center of the stator housing 1, and a second conductor 4 passes through the center of the rotor housing 2. The first conductor 3 and the second conductor 4 are arranged coaxially along the axial direction and are interlocked to form a single-channel electrical connection or signal transmission channel between the stator side and the rotor side.

[0020] The inner wall of the stator housing 1 is fixed to the outer ring of the bearing 7, and the inner ring of the bearing 7 is fixed to the outer wall of the rotor housing 2, enabling the rotor housing 2 to rotate stably about the central axis relative to the stator housing 1. The bearing 7 provides radial support and rotational guidance for the rotor housing 2, reducing sway and eccentricity during high-speed rotation, improving the stability of the connection between the first conductor 3 and the second conductor 4, and providing a more stable structural foundation for continuous contact between the shield 12 and the rotor housing 2.

[0021] A first connector 8 is provided at one end of the stator housing 1, and a first clamping member 9 is fixed to the inner wall of the first connector 8. The first conductor 3 passes through the first clamping member 9 and is positioned at the center of the stator housing 1. A second connector 10 is provided at one end of the rotor housing 2, and a second clamping member 11 is fixed to the inner wall of the second connector 10. The second conductor 4 passes through the second clamping member 11 and is positioned at the center of the rotor housing 2. The first clamping member 9 and the second clamping member 11 are used to support and position the first conductor 3 and the second conductor 4, respectively, so that the first conductor 3 and the second conductor 4 maintain good coaxiality inside the rotary connector and reduce contact instability caused by assembly deviations.

[0022] A shielding element 12 is provided inside the stator housing 1. The shielding element 12 is preferably a conductive metal part, but it can also be a cylindrical part with a conductive plating layer on its surface. The shielding element 12 is coaxially sleeved on the outside of the first conductor 3, so that the first conductor 3 is at least partially located within the hollow cavity enclosed by the shielding element 12. Through this structure, the shielding element 12 can provide enveloping shielding for the electromagnetic field around the first conductor 3, reducing the influence of external interference signals on the transmitted signal of the first conductor 3, and also reducing the outward diffusion of interference during the transmission process of the first conductor 3.

[0023] The shield 12 has a flange 121 at the end away from the rotor housing 2. The inner wall of the stator housing 1 has a boss 13. The first connector 8 is screwed onto the inner wall of the stator housing 1, and the flange 121 is engaged between the inner end of the first connector 8 and the boss 13. During assembly, the shield 12 can be first placed into the stator housing 1, with the flange 121 abutting against one side of the boss 13. Then, the first connector 8 is screwed into the stator housing 1. The first connector 8 and the boss 13 together clamp the flange 121, thereby axially limiting the shield 12. This structure eliminates the need for additional complex fasteners, ensuring reliable fixation of the shield 12 within the stator housing 1 and facilitating the coaxial arrangement between the shield 12 and the first conductor 3.

[0024] The shield 12 has a claw-shaped structure at one end near the rotor housing 2, which includes several circumferentially spaced elastic tabs 122. Each elastic tab 122 is formed by axially slotting at the end of the shield 12, and there are gaps between adjacent elastic tabs 122, allowing each elastic tab 122 to undergo radial elastic deformation. In its natural state, each elastic tab 122 opens radially outward, meaning that when not installed within the space defined by the inner wall of the rotor housing 2, the outer diameter of the elastic tab 122 is slightly larger than its outer diameter in its working installation state. Therefore, when the shield 12 is assembled into the stator housing 1 and the claw-shaped structure extends into the corresponding inner cavity of the rotor housing 2, each elastic tab 122 is constrained by the inner wall of the rotor housing 2 and undergoes inward elastic contraction, generating a radially outward restoring force.

[0025] Each spring piece 122 has an arc-shaped protrusion 123 on its outer surface. The arc-shaped protrusion 123 protrudes towards the inner wall of the rotor housing 2 and elastically abuts against the inner wall of the rotor housing 2. The arc-shaped protrusion 123 can be a stamped, rolled, or partially bent convex structure with a smooth arc surface on its outer surface. By contacting the inner wall of the rotor housing 2 with the arc-shaped protrusion 123, sharp corner scratches and local wear can be reduced, allowing the spring piece 122 to form a more stable elastic sliding contact with the inner wall of the rotor housing 2 when the rotor housing 2 rotates relative to it. At the same time, the arc-shaped protrusion 123 concentrates and transmits the elastic restoring force of the spring piece 122 to the inner wall of the rotor housing 2, improving the reliability of the contact between the shield 12 and the rotor housing 2.

[0026] During the operation of the rotary connector, the stator housing 1 remains fixed, while the rotor housing 2 rotates at high speed around its central axis. Because the flange 121 of the shield 12 is limited by the first connector 8 and the boss 13, the shield 12 remains entirely on the stator side. The end of the shield 12 closest to the rotor housing 2 maintains elastic contact with the inner wall of the rotor housing 2 via spring tabs 122 and arc-shaped protrusions 123. Even if the rotor housing 2 experiences slight radial runout, assembly eccentricity, or changes in machining tolerances during high-speed rotation, each spring tab 122 can compensate through its own elastic deformation, ensuring that the arc-shaped protrusions 123 continuously abut against the inner wall of the rotor housing 2, thereby maintaining reliable conductive contact between the shield 12 and the rotor housing 2.

[0027] Through the above structure, the shield 12 can form a continuous or substantially continuous shielding path with the rotor housing 2, so that the signal transmission area where the first conductor 3 and the second conductor 4 are located is well surrounded within the conductive shielding structure. Compared with the structure that only uses a common cylindrical shielding sleeve with a gap fit between the end and the rotating housing, the claw-shaped spring structure in this embodiment can actively compensate for the contact gap during rotation, avoiding interruption of shielding contact due to high-speed rotation vibration, assembly deviation or wear, thereby effectively reducing signal interference under high-speed rotation conditions and improving the signal transmission stability of the connector.

[0028] Furthermore, a deep groove is formed on the side of the first conductor 3 near the second conductor 4, extending axially along the first conductor 3. A spring 5 and a friction element 6 are disposed within the deep groove, with one end of the spring 5 fixed to the bottom of the deep groove and the other end fixed to the planar end of the friction element 6. The end of the second conductor 4 is inserted into the deep groove and makes rotational frictional contact with the end of the friction element 6 near the second conductor 4. Through the insertion and engagement of the first conductor 3 and the second conductor 4, and with the spring 5 applying a continuous axial preload to the friction element 6, the friction element 6 can always be pressed against the end of the second conductor 4, achieving reliable conductivity between the first conductor 3 and the second conductor 4.

[0029] The friction element 6 has a spherical structure at one end near the second conductor 4 and a planar structure at the other end. The end of the second conductor 4 that contacts the friction element 6 is designed to match the spherical structure of the friction element 6. The spherical contact structure can accommodate slight angular and axial deviations when the second conductor 4 rotates, reducing the problem of uneven local contact. As the contact surface between the friction element 6 and the second conductor 4 wears down during long-term use, the spring 5 can push the friction element 6 to move towards the second conductor 4 along the groove direction to compensate, ensuring that the friction element 6 continues to maintain contact with the second conductor 4, reducing contact resistance fluctuations and the risk of instantaneous disconnection.

[0030] In specific implementations, the friction element 6 is preferably made of gold-plated copper. The copper substrate provides good electrical conductivity, while the gold plating layer improves the oxidation resistance and wear resistance of the contact surface, making it suitable for low-resistance contact under high-speed rotation conditions. Depending on the actual application requirements, the friction element 6 can also be made of other metallic materials or composite conductive materials with good electrical conductivity and wear resistance.

[0031] A flange 14 may also be provided on the outer wall of the stator housing 1. The flange 14 is used to install and fix the connector on the mounting plate, frame, or rotation detection device of the external equipment, improving the convenience of installation and positioning stability of the whole machine. The flange 14 can be integrally formed with the stator housing 1, or it can be fixed to the outer wall of the stator housing 1 by screwing, welding, or press-fitting.

[0032] In this embodiment, the shielded single-channel high-speed rotary connector is used such that the external fixed structure is connected to the stator housing 1, and the external rotating structure is connected to the rotor housing 2. When the rotor housing 2 rotates at high speed, the first conductor 3 and the second conductor 4 form a rotating conductive contact through the friction element 6, realizing single-channel signal or power transmission. At the same time, the shield 12 is sleeved on the outside of the first conductor 3 and maintains elastic conductive contact with the inner wall of the rotor housing 2 through the claw-shaped spring piece 122 and the arc-shaped protrusion 123. This makes it difficult for the shield 12 to lose contact with the rotor housing 2 due to vibration, eccentricity, or wear, thereby continuously exerting electromagnetic shielding during rotation, reducing signal interference under high-speed rotation conditions, and improving the transmission stability and reliability of the rotary connector.

[0033] It should be noted that the directional descriptions such as "coaxial," "radial," "circumferential," "inner," and "outer" in the above embodiments are based on the structure shown in the accompanying drawings and the conventional installation state of the rotary connector, and are not intended to limit the scope of protection of this utility model. For those skilled in the art, without departing from the concept of this utility model, equivalent substitutions or adaptive adjustments can be made to the number of spring pieces 122, the shape of the arc-shaped protrusions 123, the material of the shielding member 12, the limiting method of the flange 121, and the conductor contact structure, and all such modifications should fall within the scope of protection of this utility model.

[0034] It should be noted that implementations not shown or described in the accompanying drawings or the main text of the specification are all forms known to those skilled in the art and are not described in detail. Furthermore, the definitions of the elements and methods described above are not limited to the various specific structures, shapes, or methods mentioned in the embodiments.

[0035] It should also be noted that this document may provide examples of parameters containing specific values, but these parameters need not be exactly equal to the corresponding values, but can approximate the corresponding values ​​within acceptable error tolerances or design constraints. Directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this application.

[0036] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A single-channel high-speed rotary connector with a shielded structure, characterized in that, It includes a stator housing (1) and a rotor housing (2) coaxial with and rotatably connected to the stator housing (1). A first conductor (3) is provided through the center of the stator housing (1), and a second conductor (4) is provided through the center of the rotor housing (2). The first conductor (3) and the second conductor (4) are connected in an interlocking manner. The stator housing (1) is provided with a shield (12), which is coaxially sleeved on the outside of the first conductor (3). The end of the shield (12) near the rotor housing (2) is a claw-shaped structure. The claw-shaped structure includes a number of spring pieces (122) arranged circumferentially. Each spring piece (122) is radially outward in its natural state. The outer surface of each spring piece (122) is provided with an arc-shaped protrusion (123). The arc-shaped protrusion (123) elastically abuts against the inner wall of the rotor housing (2) so that the shield (12) and the rotor housing (2) maintain conductive contact.

2. The single-channel high-speed rotary connector with shielding structure according to claim 1, characterized in that, The shielding component (12) is a hollow cylindrical structure, and the first conductor (3) passes through the hollow cavity of the shielding component (12).

3. The single-channel high-speed rotary connector with shielding structure according to claim 1, characterized in that, The stator housing (1) has a first connector (8) at one end, which is screwed onto the inner wall of the stator housing (1). The inner wall of the stator housing (1) has a boss (13). The shield (12) has a flange (121) at one end away from the rotor housing (2). The flange (121) is engaged between the inner end of the first connector (8) and the boss (13).

4. The single-channel high-speed rotary connector with shielding structure according to claim 3, characterized in that, The first connector (8) has a first clip (9) fixed on its inner wall, and the first conductor (3) passes through the first clip (9) through the center of the stator housing (1); the rotor housing (2) has a second connector (10) at one end, and the second connector (10) has a second clip (11) fixed on its inner wall, and the second conductor (4) passes through the second clip (11) through the center of the rotor housing (2).

5. The single-channel high-speed rotary connector with shielding structure according to claim 1, characterized in that, The inner wall of the stator housing (1) is fixed to the outer ring of the bearing (7), and the inner ring of the bearing (7) is fixed to the outer wall of the rotor housing (2).

6. The single-channel high-speed rotary connector with shielding structure according to claim 1, characterized in that, The first conductor (3) has a deep groove on the side near the second conductor (4). A friction element (6) is provided in the deep groove through a spring (5). The end of the second conductor (4) is inserted into the deep groove and rotates and rubs against the end of the friction element (6).

7. The single-channel high-speed rotary connector with shielding structure according to claim 6, characterized in that, The friction element (6) has a spherical structure at one end near the second conductor (4) and a planar structure at the other end. The shape of the contact end between the second conductor (4) and the friction element (6) matches the shape of the friction element (6). One end of the spring (5) is fixed to the bottom of the deep groove, and the other end is fixed to the planar end of the friction element (6).

8. The single-channel high-speed rotary connector with shielding structure according to claim 6, characterized in that, The friction component (6) is made of copper plated with gold.

9. The single-channel high-speed rotary connector with shielding structure according to claim 1, characterized in that, The outer wall of the stator housing (1) is provided with a flange (14).

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