Rolling type rotary connector

Abstract

The invention relates to a rotary connector, in particular to a rolling type rotary connector which comprises a supporting frame and a rotary shaft, two or more contact assemblies are axially distributed between the supporting frame and the rotary shaft, each contact assembly comprises an outer insulating ring, an outer conducting ring, an inner insulating ring and an inner conducting ring, and an elastic ring is nested between the outer conducting ring and the inner conducting ring. The inner wall of the outer insulation ring is provided with an outer isolation ring table in a protruding mode, the outer wall of the inner insulation ring is provided with an inner isolation ring table in a protruding mode, the outer isolation ring table and the inner isolation ring table are staggered in the axial direction, and the projection of the outer isolation ring table and the projection of the inner isolation ring table in the axial direction can coincide, so that the outer isolation ring table and the inner isolation ring table form a physical isolation barrier. The walls of the inner insulating ring and the outer insulating ring are respectively provided with an inner isolating ring table and an outer isolating ring table which are close to each other, coincide with each other and staggered, so that air insulation between adjacent loops is changed into physical insulation, and the insulating performance is improved.

Description

Technical Field

[0001] The invention relates to a rotary connector, in particular to a rolling rotary connector. Background Art

[0002] At present, conventional rolling rotary connectors mostly adopt the structure of inner conductive ring + elastic ring (one or more) + outer conductive ring. The middle elastic ring is compressed and deformed by interference fit with the inner and outer conductive rings, so that the elastic ring is in reliable contact with the inner and outer conductive rings. During the rotation of the connector, the elastic ring is in rolling contact with the inner and outer conductive rings, and the signal is transmitted in the direction of inner conductive ring → elastic ring → outer conductive ring or in the opposite direction. Figure 1a 、 Figure 1b shown.

[0003] Currently, conventional rolling rotary connectors have the following main problems:

[0004] ① When the elastic ring is of the same overall size (same outer diameter and same axial length), the smaller the wall thickness of the elastic ring, the greater the elasticity. However, an elastic ring that is too thin is difficult to process, and it is impossible to take into account both the elasticity and processing properties of the elastic ring at the same time.

[0005] ② The elastic rings between adjacent loops of the connector are isolated by air, which poses a risk to the insulation performance.

[0006] ③ After working for a long time, the connector may produce debris or excess materials inside, affecting the stability of the signal.

[0007] ④ The two bearings of the rotary connector are distributed at both ends of the connector's rotating shaft. The assembly order is generally to install the bearing at one end of the connector first, then install the contact part of the connector (including the inner conductive ring, outer conductive ring, and elastic ring), and then install the bearing at the other end. When assembling the contact part, the bearing and the shaft system are not completely fixed, which increases the difficulty of assembling the elastic ring. Summary of the Invention

[0008] In order to solve the technical problem that it is difficult to balance the elasticity and processability of the elastic ring of the above-mentioned rolling rotary connector, the present invention provides a rolling rotary connector, which structurally improves the existing rolling rotary connector and enhances the connector performance and processability.

[0009] The purpose of the present invention is to be achieved by adopting the following technical solutions. According to a rolling rotary connector proposed in the present invention, it includes a support frame, a rotating shaft rotatably arranged in the support frame, and more than two contact components are axially distributed between the support frame and the rotating shaft, the contact components include an outer insulating ring arranged on the inner wall of the support frame, an outer conductive ring arranged on the inner wall of the outer insulating ring, an inner insulating ring arranged on the outer wall of the rotating shaft, and an inner conductive ring arranged on the outer wall of the inner insulating ring, an elastic ring is nested between the inner wall of the outer conductive ring and the outer wall of the inner conductive ring, the inner wall of the outer insulating ring is protruding with an outer isolation ring platform, the outer wall of the inner insulating ring is protruding with an inner isolation ring platform, the outer isolation ring platform and the inner isolation ring platform are staggered in the axial direction, and the axial projections of the outer isolation ring platform and the inner isolation ring platform can overlap, so that the outer isolation ring platform and the inner isolation ring platform form a physical isolation barrier separating adjacent contact components.

[0010] Compared with the prior art, the present invention is beneficial in that:

[0011] On the walls of the inner insulating ring and the outer insulating ring are respectively provided inner isolating ring platforms and outer isolating ring platforms which are close to each other, overlapped and staggered, so that the air insulation between adjacent loops is converted into physical insulation, thereby improving the insulation performance.

[0012] Furthermore, the inner wall of the outer insulating ring is provided with a chip groove for accommodating wear chips or excess materials generated when the connector rotates, and the outer conductive ring is nested in the outer groove of the inner wall of the outer insulating ring. The chip groove and the outer groove are both open grooves. The chip groove and the outer groove are respectively located on both sides of the outer isolation ring platform. The outer conductive ring is nested between the outer groove and the end face of the outer insulating ring of the adjacent contact component. The chip groove and the end face of the outer conductive ring of the adjacent contact component are used to accommodate wear chips or excess materials.

[0013] Furthermore, the inner conductive ring is nested in the inner groove of the outer wall of the inner insulating ring, the inner groove is an open groove, and the inner conductive ring is nested between the inner groove and the end face of the inner insulating ring of the adjacent contact assembly.

[0014] Compared with the prior art, the present invention is beneficial in that:

[0015] Setting the inner groove, outer groove and chip groove as open grooves and cooperating with adjacent contact components can reduce the thickness of a single contact component, set more contact components in the same volume, and thus increase the signal transmission density.

[0016] Furthermore, within the same contact assembly, the inner conductive ring and the outer conductive ring are located between the outer isolation ring platform and the inner isolation ring platform, and a physical isolation barrier is formed between the outer isolation ring platform and the inner isolation ring platform of the adjacent contact assembly.

[0017] Furthermore, the inner wall of the outer insulating ring is provided with a chip removal groove for accommodating grinding chips or excess materials generated when the connector rotates.

[0018] Compared with the prior art, the present invention is beneficial in that:

[0019] The inner wall of the outer insulating ring is provided with a chip groove. Grinding chips or excess materials generated during the rotation of the connector are temporarily stored in the chip groove to avoid interference with the normal transmission of signals.

[0020] Furthermore, the outer wall of the inner conductive ring is provided with an inner raceway, the inner wall of the outer conductive ring is provided with an outer raceway, and the elastic ring is nested in the inner raceway and the outer raceway.

[0021] Compared with the prior art, the present invention is beneficial in that:

[0022] The elastic ring is limited by the inner raceway and the outer raceway to prevent the elastic ring from falling off the inner conductive ring and the outer conductive ring.

[0023] Furthermore, when two or more elastic rings are provided in the contact assembly, an isolation ring is provided between adjacent elastic rings to prevent adjacent elastic rings from contacting each other and to improve the smoothness of rotation or sliding of the elastic rings.

[0024] Compared with the prior art, the present invention is beneficial in that:

[0025] When the rotary connector brings two adjacent elastic rings closer together during operation, the adjacent elastic rings will first contact the isolation ring between the adjacent elastic rings to prevent the adjacent elastic rings from further approaching each other, thereby preventing contact and extrusion between the adjacent elastic rings.

[0026] Furthermore, an outer stop step is provided on the inner wall of the support frame, an inner stop step is provided on the outer wall of the rotating shaft, the inner insulating ring of the contact assembly on the inner side of the connector is stopped on the inner stop step, and the outer insulating ring is stopped on the outer stop step; an inner stop ring is sleeved on the rotating shaft, the outer stop ring is nested in the support frame, the inner insulating ring and the inner conductive ring of the contact assembly on the outer side of the connector are stopped on the inner stop ring, and the outer insulating ring and the outer conductive ring are stopped on the outer stop ring.

[0027] Compared with the prior art, the present invention is beneficial in that:

[0028] By providing a stopping step and a retaining ring, two or more contact components can be fixed between the support frame and the rotating shaft.

[0029] Furthermore, one end of the connector is a bearing end and the other end is a contact end. The support frame of the bearing end is rotatably connected to the rotating shaft through two or more bearings, and a contact assembly is provided between the support frame of the contact end and the rotating shaft.

[0030] Compared with the prior art, the present invention is beneficial in that:

[0031] Two or more bearings are set at the same end of the connector to make the shaft system formed between the support frame and the rotating shaft more stable. When installing the contact component at the other end of the connector, the support frame at the other end of the connector and the rotating shaft are more stable. When installing the contact components in sequence, the elastic ring is not easy to fall off after being installed in the conductive ring, so the contact components can be installed quickly, improving assembly efficiency.

[0032] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, which can be implemented in accordance with the contents of the specification, and to make the objects, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1a A schematic diagram of a contact portion of a rolling rotary connector in the prior art;

[0034] Figure 1b for Figure 1a A half-section view of

[0035] Figure 2 A half-sectional view of an embodiment of a rolling rotary connector of the present invention;

[0036] Figure 3a for Figure 2 Front view of the middle elastic ring;

[0037] Figure 3b for Figure 3a Side view of;

[0038] Figure 3c is a schematic diagram of an elastic ring in another embodiment of the present invention;

[0039] Figure 4 for Figure 2 Cross-sectional view along the radial direction of the elastic ring.

[0040] Reference numerals:

[0041] 1-inner conductive ring, 101-inner raceway,

[0042] 2-outer conductive ring, 201-outer raceway,

[0043] 3-elastic ring, 301-round hole, 302-elliptical hole,

[0044] 4-inner insulating ring, 401-inner isolation ring platform, 402-inner groove,

[0045] 5-outer insulating ring, 501-outer isolation ring, 502-chip groove, 503-outer groove,

[0046] 6-support frame, 601-external stop step,

[0047] 7-rotating shaft, 701-inner stop step,

[0048] 8-bearing, 901-inner retaining ring, 902-outer retaining ring,

[0049] 9-Isolation ring. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] An embodiment of a rolling rotary connector of the present invention is as follows Figures 2 to 3b The connector includes a support frame 6, a rotating shaft 7, a bearing 8, an outer insulating ring 5, an inner insulating ring 4, an outer conductive ring 2, an inner conductive ring 1, and an elastic ring 3.

[0052] The connector's contact structure consists of an inner conductive ring 1, one or more elastic rings 3, and an outer conductive ring 2. The elastic ring 3's interference fit with the inner and outer conductive rings 1 and 2 compresses and deforms the center elastic ring 3, resulting in reliable contact with the inner and outer conductive rings 1 and 2. During rotation, the elastic ring 3 maintains rolling contact with both rings, allowing signals to be transmitted in the direction of inner conductive ring 1, elastic ring 3, and outer conductive ring 2, or in the opposite direction.

[0053] The rotating shaft 7 is inserted through the support frame 6, and the rotating shaft 7 and the support frame 6 are rotatably connected via bearings 8. In this embodiment, two bearings 8 are provided between the rotating shaft 7 and the support frame 6 to achieve stable rotation of the rotating shaft 7 on the support frame 6. The two bearings 8 are located on the same side of the connector contact portion, allowing the bearing support portion (bearing end) at one end of the connector and the contact portion (contact end) at the other end to be installed independently. After the bearing ends are installed and fixed (i.e., the two bearings 8 are installed on the same side of the connector contact portion, i.e., installed on the same side of the rotating shaft 7 and the support frame 6, so that the rotating shaft 7 is stably rotatably arranged on the support frame 6), assembly of the contact portion is facilitated.

[0054] In the prior art, bearings are provided at both ends of the connector, and the contact portion is located between the two bearings. During assembly, the bearing at one end needs to be assembled first, then the contact portion, and finally the bearing at the other end. During assembly of the contact portion, since only the bearing at one end is installed, the bearing 8 and the shaft system components are not completely fixed, the other end of the support frame 6 and the rotating shaft 7 are unstable, and the elastic ring 3 is easily dislodged from the inner conductive ring 1 and the outer conductive ring 2 during installation. When the contact components of the contact portion are installed in sequence, the elastic ring 3 of the previous contact component is easily dislodged when the next contact component is installed, and it needs to be reinstalled, which increases the difficulty of assembling the elastic ring 3. The present invention provides two or more bearings 8 at the same end of the connector, so that the support frame 6 and the rotating shaft 7 are stably rotated together. When installing the elastic ring 3, the elastic ring 3 is interference-fitted with the corresponding inner conductive ring 1 and outer conductive ring 2 to prevent the elastic ring 3 from dislodging. Then, the contact components in the contact portion of the connector are installed in sequence, achieving rapid assembly and improving assembly convenience.

[0055] The contact end of the connector is equipped with two or more contact components. A cavity for setting the contact components is reserved at the contact end of the rotating shaft 7 and the contact end of the support frame 6. The contact components are sleeved on the rotating shaft 7 and nested in the support frame 6. Several contact components are distributed in the axial direction of the connector.

[0056] An outer stop step 601 is provided on the inner wall of the support frame 6, and an inner stop step 701 is provided on the outer wall of the rotating shaft 7. In this embodiment, the radial surfaces of the outer stop step 601 and the inner stop step 701 are located on the same plane perpendicular to the rotating shaft 7. Several contact assemblies are sequentially inserted axially into the cavity, with the innermost contact assembly stopped on the stop step (including the inner stop step 701 and the outer stop step 601). A retaining ring (including an inner stop ring 901 sleeved on the rotating shaft 7 and an outer stop ring 902 nested in the support frame 6) is provided on the outermost side of the cavity to stop the outermost contact assembly. The inner stop ring 901 is fixed to the outer wall of the rotating shaft 7, and the outer stop ring 902 is fixed to the inner wall of the support frame 6, thereby fixing the contact assembly in the cavity.

[0057] Each contact assembly includes an outer insulating ring 5 , an inner insulating ring 4 , an outer conductive ring 2 , an inner conductive ring 1 , and an elastic ring 3 .

[0058] The outer wall of the outer insulating ring 5 mates with the inner wall of the support frame 6 and is provided with an outer groove 503 on its inner wall for the outer conductive ring 2 to be nested therein. The inner wall of the inner insulating ring 4 mates with the outer wall of the rotating shaft 7 and is provided with an inner groove 402 on its outer wall for the inner conductive ring 1 to be nested therein. The outer groove 503 and the inner groove 402 are radially aligned, ensuring that the outer conductive ring 2 and the inner conductive ring 1 are aligned with each other when nested in their corresponding grooves and can simultaneously contact the same elastic ring 3.

[0059] The inner wall of the outer insulating ring 5 is provided with an outer isolating platform 501, which protrudes toward the center of the connector. The outer wall of the inner insulating ring 4 is provided with an inner isolating platform 401, which protrudes toward the outside of the connector. The outer isolating platform 501 and the inner isolating platform 401 are staggered axially so that their axial projections partially overlap. After multiple contact assemblies are stacked and inserted in the same direction, the physical isolation barrier formed by the outer isolating platform 501 and the inner isolating platform 401 separates the outer conductive ring 2, inner conductive ring 1, and elastic ring 3 of each contact assembly, transforming the air isolation insulation between adjacent contact assemblies (loops) into physical isolation insulation, improving insulation performance and reducing insulation risks. Within the same contact assembly, the inner conductive ring 1 and the outer conductive ring 2 are located on the same side of the physical isolation barrier (including the outer isolating platform 501 and the inner isolating platform 401). There is a certain gap between the outer isolating ring 501 and the inner isolating ring 401 to prevent the outer isolating ring 501 and the inner isolating ring 401 from rubbing against each other and generating resistance when the connector rotates.

[0060] The inner wall of the outer insulating ring 5 is provided with a chip groove 502. Chip groove 502 is positioned low during connector rotation, allowing gravity to collect wear debris and other debris generated within the connector. After extended operation, these debris accumulates in the groove, preventing interference from affecting signal transmission stability and thus improving connector operation stability.

[0061] In this embodiment, in order to reduce the thickness of a single contact component, more contact components are set in the same volume, thereby increasing the signal transmission density. The outer isolation ring platform 501 is set between the outer groove 503 and the chip groove 502. The outer groove 503, the chip groove 502, and the inner groove 402 are open grooves. One side wall of the outer groove 503 is the end face of the outer insulating ring 5 of the adjacent contact component or the end face of the outer retaining ring 902, and the outer conductive ring 2 is nested inside it. One side wall of the inner groove 402 is the end face of the inner insulating ring 4 of the adjacent contact component or the end face of the inner retaining ring 901, and the inner conductive ring 1 is nested inside it. One side wall of the chip groove 502 is the end face of the outer conductive ring 2 in the adjacent contact component, which is used to accommodate wear chips or excess materials.

[0062] like Figure 3a 、 Figure 3bThe figure shows an elastic ring 3, which has multiple circular holes 301 distributed circumferentially along its wall. The addition of these holes increases the elasticity of the ring while reducing assembly difficulty, while maintaining the same wall thickness and outer diameter as conventional elastic rings. Due to its high elasticity, the outer diameter of the ring can be increased. Once installed between the inner and outer conductive rings 1 and 2, the ring securely presses against them. This increased elasticity improves the stability of the contact between the rings, thereby enhancing signal transmission stability.

[0063] The inner conductive ring 1 has an inner raceway 101 on its outer wall, and the outer conductive ring 2 has an outer raceway 201 on its inner wall. The elastic ring 3 nests within the inner and outer raceways 101, 201. When the connector rotates, the inner and outer conductive rings 1 and 2 rotate relative to each other, while the elastic ring 3 slides relative to the inner and outer raceways 101, 201. This electrically connects the inner and outer conductive rings 1 and 2 via the elastic ring 3. When the elastic ring 3 is installed within the inner and outer raceways 101, 201, its elastic deformation improves assembly convenience.

[0064] When there is only one elastic ring 3 between the inner conductive ring 1 and the outer conductive ring 2, only the elastic ring 3 can be set between the inner conductive ring 1 and the outer conductive ring 2. When there are two or more elastic rings 3 between the inner conductive ring 1 and the outer conductive ring 2, during the operation of the rotary connector, adjacent elastic rings 3 are likely to contact and squeeze, making the elastic rings 3 rotate or slide unsmoothly, and easily causing the rotary connector to get stuck. Therefore, an isolation ring 9 is set between adjacent elastic rings 3. In this embodiment, the isolation ring 9 can be made of polyimide and oil-immersed, so that it can provide a self-lubricating function during operation. When the rotary connector brings two adjacent elastic rings 3 close to each other during operation, the adjacent elastic rings 3 will first contact the isolation ring 9 between the adjacent elastic rings 3 to prevent the adjacent elastic rings 3 from continuing to approach each other, thereby preventing contact and squeezing between the adjacent elastic rings 3.

[0065] When the number of elastic rings 3 is small, for example, only two or three, the diameter of the isolation ring 9 can be set larger, and the isolation ring 9 is limited between the corresponding inner conductive ring 1 and the outer conductive ring 2 by the inner isolation ring stage 401 and the outer isolation ring stage 501. Figure 4 As shown, the isolation ring 9 can be set in the inner raceway 101 of the inner conductive ring 1 and block the two adjacent elastic rings 3 at the same time; or, the outer diameter of the isolation ring 9 can be increased, and the isolation ring 9 can be set in the outer raceway 201 of the outer conductive ring 2 and block the two adjacent elastic rings 3 at the same time.

[0066] When the connector is in use, the inner conductive ring 1 and the outer conductive ring 2 are respectively connected to two relatively rotating devices or components, thereby achieving a rotational electrical connection between the two relatively rotating devices or components.

[0067] The technical effects of the present invention are summarized as follows:

[0068] 1. Multiple circular holes 301 are distributed on the wall of the elastic ring 3 in the rolling rotary connector. Without changing the wall thickness and outer diameter of the elastic ring 3, the elasticity of the elastic ring can be increased, the processing difficulty can be reduced, and the stability of the contact between the elastic ring and the inner and outer conductive rings can be improved. When the elastic ring 3 is installed in the connector, the elastic ring 3 needs to have an interference fit with the inner conductive ring 1 and the outer conductive ring 2. Since the elastic ring 3 has great elasticity, it is convenient to flatten the elastic ring 3 and install it in the conductive rings (including the inner conductive ring 1 and the outer conductive ring 2). Then, under the self-restoring force of the elastic ring 3, it is in close contact with the conductive rings, ensuring reliable contact between the conductive rings and the elastic ring 3 and ensuring the stability of signal transmission.

[0069] 2. Two or more bearings 8 are provided at the same end of the connector to make the shaft system formed between the support frame 6 and the rotating shaft 7 more stable. When installing the contact assembly at the other end of the connector, the support frame 6 at the other end of the connector and the rotating shaft 7 are more stable. When installing the contact assemblies in sequence, the elastic ring 3 is not easy to fall off after being installed in the conductive ring, and the contact assembly can be installed quickly, thereby improving assembly efficiency.

[0070] 3. The walls of the inner insulating ring 4 and the outer insulating ring 5 are respectively provided with inner isolating ring platforms 401 and outer isolating ring platforms 501 that are close to each other, overlapped and staggered, so that the air insulation between adjacent loops is converted into physical insulation, thereby improving the insulation performance.

[0071] 4. The inner wall of the outer insulating ring 5 is provided with a chip removal groove 502. Grinding chips or excess materials generated during the rotation of the connector are temporarily stored in the chip removal groove 502 to avoid interference with the normal transmission of signals.

[0072] In other embodiments of the present invention, based on the above embodiment, the circular hole 301 on the elastic ring 3 can be replaced by a square hole or other shapes. As a preferred embodiment, the circular hole 301 on the elastic ring 3 can be replaced by an elliptical hole 302, such as Figure 3c The long axis of the elliptical hole 302 is parallel to the rolling direction of the elastic ring 3 (which is also the contact pressure direction of the inner conductive ring 1 and the outer conductive ring 2 driving the elastic ring 3 to roll when the elastic ring 3 rolls). This can maximize weight reduction and optimize stress concentration in the rolling direction, providing better fatigue performance, stiffness, and strength than the circular hole 301. The specific reasons are as follows:

[0073] Since the elastic ring 3 is in elastic contact with the inner conductive ring 1 and the outer conductive ring 2, the relative rotation of the inner conductive ring 1 and the outer conductive ring 2 can drive the elastic ring 3 to roll. Therefore, a part of the contact pressure of the inner conductive ring 1 or the outer conductive ring 2 on the elastic ring 3 is converted into a force that drives the elastic ring 3 to roll circumferentially, so that this part of the contact pressure is parallel to the rolling direction of the elastic ring 3. When driving the elastic ring 3 to roll, the contact pressure will act on the structure of the elastic ring 3, that is, the elastic ring 3 is squeezed in the rolling direction of the elastic ring 3.

[0074] When the hole on the elastic ring 3 is a circular hole 301, the stress distribution at the edge of the circular hole 301 is uniform; the stress distribution of the elliptical hole 302 is highly dependent on the orientation of the long axis of the elliptical hole 302. When the long axis is perpendicular to the contact pressure / rolling direction, this is the most unfavorable situation. The stress is highly concentrated at both ends of the long axis of the elliptical hole 302 (i.e., the most "pointy" points of the elliptical hole). The flatter the hole (the smaller the ratio of the minor axis to the major axis), the more severe the stress concentration at both ends of the major axis; when the major axis is parallel to the contact pressure / rolling direction (the preferred embodiment adopted), the stress is distributed at both ends of the minor axis of the elliptical hole 302 (on both sides of the major axis). The arcs at both ends of the minor axis of the elliptical hole 302 are relatively gentle, which can disperse the stress. The flatter the hole, the lower the stress concentration at both ends of the minor axis. Therefore, when the long axis of the elliptical hole 302 is parallel to the contact pressure / rolling direction, the stress is dispersed; when the long axis is perpendicular to the contact pressure / rolling direction, the stress is concentrated. The circular hole is between the two. Therefore, the use of the elliptical hole 302 with the long axis parallel to the contact pressure / rolling direction can reduce stress concentration.

[0075] When elastic ring 3 operates for extended periods, contact pressure exerts a circumferential squeeze on it. The ends of circular hole 301 perpendicular to the contact pressure are the highest stress points. Fatigue cracks in circular hole 301 typically initiate and propagate symmetrically from these highest stress points, making its lifespan relatively predictable. When elliptical hole 302, with its major axis parallel to the rolling direction, is subjected to contact pressure, the stress is dispersed to the relatively gentle arcs at the ends of its minor axis (on either side of the major axis), reducing stress concentration. Lower stress concentration translates to better fatigue performance than circular hole 301 of the same area or width, resulting in greater durability.

[0076] The presence of circular hole 301 locally reduces the stiffness and strength of elastic ring 3. Under rolling contact pressure, the material around circular hole 301 is more susceptible to symmetrical, uniform localized plastic deformation or crushing (especially at the edge of circular hole 301). By employing an elliptical hole 302 with its major axis parallel to the rolling direction, the stiffness in the major axis direction is higher, and the elliptical hole 302 has relatively strong resistance to deformation in the direction of contact pressure (major axis). Furthermore, due to the lower stress concentration at both ends of the minor axis (on both sides of the major axis), the risk of damage is relatively low, thereby increasing the strength of elastic ring 3.

[0077] In other embodiments of the present invention, on the basis of the above embodiments, in order to further fix the conductive ring (including the inner conductive ring 1 and the outer conductive ring 2) and the insulating ring (including the inner insulating ring 4 and the outer insulating ring 5) on the corresponding structure, the insulating ring can be forcibly mounted on the corresponding support frame 6 and rotated 7, and the inner conductive ring 1 can be forcibly mounted on the inner insulating ring 4, and the outer conductive ring 2 can be forcibly mounted on the outer insulating ring 5.

[0078] In other embodiments of the present invention, based on the above embodiments, the cross-sections of the inner raceway 101 and the outer raceway 201 may be arc-shaped grooves or straight grooves.

[0079] In other embodiments of the present invention, based on the above embodiment, the chip removal groove 502 and the outer groove 503 can be arranged on the same side of the outer isolation ring platform 501 .

[0080] In other embodiments of the present invention, based on the above embodiments, within the same contact component, the inner conductive ring 1 and the outer conductive ring 2 are located between the outer isolation ring platform 501 and the inner isolation ring platform 401, and a physical isolation barrier is formed between the outer isolation ring platform 501 and the inner isolation ring platform 401 of the adjacent contact component.

[0081] In other embodiments of the present invention, based on the above embodiments, the isolation ring 9 can be replaced by an isolation block. The isolation block is made of polyimide and is oil-immersed. During operation, it can provide a self-lubricating function. The cross-section of the isolation block is generally rectangular. The surfaces on both sides of the isolation block that contact the elastic ring 3 are arc surfaces that match the elastic ring 3, and the other two surfaces are planes.

[0082] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and alterations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rolling rotary connector, comprising a support frame (6), a rotary shaft (7) rotatably arranged in the support frame (6), two or more contact components axially distributed between the support frame (6) and the rotary shaft (7), the contact components comprising an outer insulating ring (5) arranged on the inner wall of the support frame (6), an outer conductive ring (2) arranged on the inner wall of the outer insulating ring (5), an inner insulating ring (4) arranged on the outer wall of the rotary shaft (7), and an inner conductive ring (1) arranged on the outer wall of the inner insulating ring (4), an elastic ring (3) being nested between the inner wall of the outer conductive ring (2) and the outer wall of the inner conductive ring (1), characterized in that: An outer isolation ring platform (501) is protruding from the inner wall of the outer insulating ring (5), and an inner isolation ring platform (401) is protruding from the outer wall of the inner insulating ring (4). The outer isolation ring platform (501) and the inner isolation ring platform (401) are staggered in the axial direction, and the projections of the outer isolation ring platform (501) and the inner isolation ring platform (401) in the axial direction can overlap, so that the outer isolation ring platform (501) and the inner isolation ring platform (401) form a physical isolation barrier that separates adjacent contact components.

2. The rolling rotary connector according to claim 1, characterized in that: The inner wall of the outer insulating ring (5) is provided with a chip removal groove (502) for accommodating wear chips or excess materials generated when the connector rotates. The outer conductive ring (2) is nested in the outer groove (503) on the inner wall of the outer insulating ring (5). The chip removal groove (502) and the outer groove (503) are both open grooves. The chip removal groove (502) and the outer groove (503) are respectively located on both sides of the outer isolation ring platform (501). The outer conductive ring (2) is nested between the outer groove (503) and the end face of the outer insulating ring (5) of the adjacent contact component. The chip removal groove (502) and the end face of the outer conductive ring (2) of the adjacent contact component are used to accommodate wear chips or excess materials.

3. The rolling rotary connector according to claim 2, characterized in that: The inner conductive ring (1) is nested in an inner groove (402) on the outer wall of the inner insulating ring (4); the inner groove (402) is an open groove; the inner conductive ring (1) is nested between the inner groove (402) and the end face of the inner insulating ring (4) of the adjacent contact component.

4. The rolling rotary connector according to claim 1, wherein: In the same contact component, the inner conductive ring (1) and the outer conductive ring (2) are located between the outer isolation ring platform (501) and the inner isolation ring platform (401), and a physical isolation barrier is formed between the outer isolation ring platform (501) and the inner isolation ring platform (401) of the adjacent contact component.

5. The rolling rotary connector according to claim 1, characterized in that: The inner wall of the outer insulating ring (5) is provided with a chip removal groove (502) for accommodating grinding chips or excess materials generated when the connector rotates.

6. A rolling rotary connector according to any one of claims 1 to 5, characterized in that: The outer wall of the inner conductive ring (1) is provided with an inner raceway (101), the inner wall of the outer conductive ring (2) is provided with an outer raceway (201), and the elastic ring (3) is nested in the inner raceway (101) and the outer raceway (201).

7. A rolling rotary connector according to any one of claims 1 to 5, characterized in that: When two or more elastic rings (3) are provided in the contact assembly, an isolation ring (9) is provided between adjacent elastic rings (3) for preventing adjacent elastic rings (3) from contacting each other and improving the smoothness of rotation or sliding of the elastic rings (3).

8. The rolling rotary connector according to any one of claims 1 to 5, characterized in that: An outer stop step (601) is provided on the inner wall of the support frame (6), and an inner stop step (701) is provided on the outer wall of the rotating shaft (7); the inner insulating ring (4) of the contact assembly on the inner side of the connector is stopped on the inner stop step (701), and the outer insulating ring (5) is stopped on the outer stop step (601); an inner stop ring (901) is sleeved on the rotating shaft (7), and the outer stop ring (902) is nested in the support frame (6); the inner insulating ring (4) and the inner conductive ring (1) of the contact assembly on the outer side of the connector are stopped on the inner stop ring (901), and the outer insulating ring (5) and the outer conductive ring (2) are stopped on the outer stop ring (902).

9. The rolling rotary connector according to any one of claims 1 to 5, characterized in that: One end of the connector is a bearing end and the other end is a contact end. The support frame (6) at the bearing end and the rotating shaft (7) are rotatably connected via two or more bearings (8), and a contact assembly is provided between the support frame (6) at the contact end and the rotating shaft (7).

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