A rolling rotary connector

Abstract

The utility model relates to a rotary connector, specifically relates to a rolling rotary connector, including mounting panel, rotation axis, conducting ring and insulating ring, is provided rolling assembly on the mounting panel, and rolling assembly includes the insulating sleeve setting on the mounting panel, is provided rolling body in the insulating sleeve, and the rolling body projects insulating sleeve and rolls contact with conducting ring, the insulating sleeve still is provided with the slider that rolls contact with rolling body and the elastic piece that is pre -tight in the drum sleeve and extrudes slider to make rolling body with conducting ring have contact pressure, the slider is connected with stator end wire electricity, the utility model discloses the structural improvement to the existing rolling rotary connector, improves the rolling ring structure to rolling assembly, and this rolling assembly is under the premise of realizing rolling contact, and is easy to process, assembles, as a result of more easily processing, so can realize miniaturization, and further can realize the miniaturization of rotary connector, improves the processing and assembly process property of rotary connector simultaneously.

Description

Technical Field

[0001] This utility model relates to a rotary connector, specifically a rolling rotary connector. Background Technology

[0002] Currently, conventional conductive slip rings (rotary connectors) mostly use sliding contact between brushes and tracks, or rolling contact between elastic rings and tracks, to achieve electrical connection between stationary and rotating components. In the traditional sliding contact method, brushes are placed on the stationary terminals, tracks are axially distributed on the rotating shaft, and insulating rings are placed between adjacent tracks and on both sides of the tracks. The brushes contact the tracks, and the tracks rotate with the rotating shaft. Electrical connection is achieved through sliding friction between the brushes and tracks. The biggest drawback of this method is that it generates significant friction and wear, thus affecting the product's service life. In the rolling contact type, an elastic ring is set between the inner and outer conductive rings. The outer wall of the inner conductive ring has an inner raceway, and the inner wall of the outer conductive ring has an outer raceway. The elastic ring is confined between the inner and outer raceways. When relative rotation occurs between the inner and outer conductive rings, the elastic ring rolls with both the inner and outer conductive rings, thereby achieving electrical connection. One of the inner and outer conductive rings is the rotor end, and the other is the stator end. The rolling contact type compresses the elastic ring to ensure stable contact between the elastic ring and the rotor and stator ends, thereby achieving stable signal transmission. The rolling contact type has less wear and can effectively improve product life.

[0003] Currently, conventional rolling rotary connectors mainly use a contact form between an elastic ring and the inner and outer raceways of the inner and outer conductive rings. This form has the following main problems: ① To maintain elasticity, the elastic ring is relatively thin, making it prone to deformation during processing, resulting in greater processing difficulty; ② To maintain elasticity, the diameter-to-thickness ratio of the elastic ring cannot be too large. Therefore, the smaller the diameter and the thinner the elastic ring, the more difficult it is to process. Due to the size limitation of the elastic ring, the product size cannot be made too small, limiting miniaturization. ③ The elastic ring needs to be compressed and deformed during assembly to fit between the inner and outer raceways, which is difficult to install, and the more rings there are, the greater the installation difficulty. Utility Model Content

[0004] To address the technical problems of difficult processing, inability to miniaturize, and high installation difficulty of the aforementioned rolling rotary connector, this utility model provides a rolling rotary connector.

[0005] The objective of this utility model is achieved through the following technical solution. A rolling rotary connector according to this utility model includes a mounting plate, a rotating shaft, a conductive ring disposed on the rotating shaft, and an insulating ring. The conductive ring is electrically connected to the rotor end wire. A rolling assembly is disposed on the mounting plate. The rolling assembly includes an insulating sleeve disposed on the mounting plate, a rolling element disposed within the insulating sleeve, the rolling element extending out of the insulating sleeve and rolling in contact with the conductive ring. A slider that rolls in contact with the rolling element and an elastic element pre-tightened within a roller sleeve and pressing the slider to create contact pressure between the rolling element and the conductive ring are also disposed within the insulating sleeve. The slider is electrically connected to the stator end wire.

[0006] Compared with the prior art, the advantages of this utility model are:

[0007] This invention makes a structural improvement to the existing rolling rotary connector by changing the rolling ring structure (including an inner conductive ring, an outer conductive ring, and an elastic ring) into a rolling structure (i.e., a rolling assembly). This rolling assembly is easy to process and assemble while achieving rolling contact. Because it is easier to process, it can be miniaturized, thereby enabling the miniaturization of the rotary connector, while improving the processing and assembly processability of the rotary connector.

[0008] Furthermore, the insulating sleeve has a tapering structure at one end facing the conductive ring. The inner diameter of the tapering structure gradually decreases in the direction close to the conductive ring, so that the rolling element does not come out of the insulating sleeve while extending out of the insulating sleeve. The radial cross-sectional shape of the tapering structure matches the radial cross-sectional shape of the rolling element.

[0009] Furthermore, the slider is provided with a variable diameter boss on the side facing the closing structure. The outer diameter of the variable diameter boss gradually decreases in the direction close to the closing structure to avoid interference with the inner wall of the closing structure.

[0010] Furthermore, the rolling element is a ball or a roller.

[0011] Furthermore, when the rolling element is a ball, the outer wall of the conductive ring is provided with a V-shaped groove, and the ball rolls in the V-shaped groove; when the rolling element is a roller, the outer wall of the conductive ring is provided with a U-shaped groove, and the roller rolls in contact with the bottom surface of the U-shaped groove.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] By using balls to contact the V-groove, or by using rollers, the contact area is increased, thus enhancing conductivity.

[0014] Furthermore, when the rolling element is a ball, a spherical groove matching the rolling element is provided on the slider; when the rolling element is a roller, a cylindrical groove matching the rolling element is provided on the slider.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] The slider and rolling element are structurally matched to reduce rolling resistance.

[0017] Furthermore, an insulating cap is provided at the end of the insulating sleeve away from the closing structure, and one end of the elastic element abuts against the slider and the other end abuts against the insulating cap.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] The elastic element is pre-pressed into the insulating sleeve by the insulating cover, so that the rolling element and the conductive ring can make reliable contact.

[0020] Furthermore, the inner wall of the insulating cover is provided with a limiting groove for nesting the end of the elastic element.

[0021] Furthermore, the slider is provided with a limiting groove for nesting the end of the elastic element.

[0022] Compared with the prior art, the advantages of this utility model are:

[0023] The limiting groove prevents the elastic element from wobbling inside the insulating sleeve, ensuring the normal expansion and contraction of the elastic element.

[0024] Furthermore, the insulating cover is provided with a wire hole for passing through the terminal wire.

[0025] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a partial cross-sectional schematic diagram of an embodiment of a rolling rotary connector according to the present invention;

[0027] Figure 2 for Figure 1 A cross-sectional view of the scrolling component.

[0028] Figure label:

[0029] 1- Rotation axis;

[0030] 2-Insulating Ring I;

[0031] 3-Insulating Ring II;

[0032] 4-Conductive ring, 41-V-groove;

[0033] 5-Mounting plate;

[0034] 6-Rolling assembly, 61-Insulating sleeve, 611-Closing structure, 62-Ball, 63-Slider, 631-Spherical groove, 632-Variable diameter boss, 64-Spring, 65-Insulating cover, 651-Limiting groove, 652-Wire hole;

[0035] 7-Stator end conductors;

[0036] 8-Rotor end wire. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] An embodiment of the present invention, a rolling rotary connector, is shown below. Figures 1 to 2 As shown. The rotary connector includes a stator end and a rotor end. The rotor end includes a rotating shaft 1, an insulating ring, a conductive ring 4, and a rotor end wire 8. The stator end includes a mounting plate 5, a rolling assembly 6, and a stator end wire 7.

[0039] Rotary connectors are used to connect the rotating part and the fixed part of a device, enabling dynamic electrical connection between the rotating part and the fixed part. The rotating part is fixedly connected to the rotor end and the rotor end wire 8 is electrically connected to the rotating part. The fixed part is fixedly connected to the stator end and the stator end wire 7 is electrically connected to the fixed part.

[0040] A plurality of insulating rings are axially distributed on the rotating shaft 1, and the insulating rings have grooves, within which conductive rings 4 are nested. In this embodiment, the insulating rings include insulating ring I 2 and insulating ring II 3. Insulating ring I 2 has a notch on the side facing insulating ring II 3, and the notch of insulating ring I 2 mates with insulating ring II 3 to form a groove. During assembly, the conductive ring 4 is first inserted into the notch of insulating ring I 2, and then insulating ring II 3 is inserted, mates with insulating ring I 2, thereby installing the conductive ring 4 in the groove. The insulating rings are axially limited on the rotating shaft 1, realizing the installation and fixation of the insulating rings and conductive rings 4. The conductive rings 4 contact the two sides and the bottom of the insulating rings, ensuring insulation between the conductive rings 4 and the rotating shaft 1 and between adjacent loops.

[0041] A rotor end wire 8 is threaded through the insulating ring. The rotor end wire 8 also passes through the rotating shaft 1 and is insulated from the rotating shaft 1. The rotating shaft 1 is hollow, which, in addition to reducing weight, allows the rotor end wire 8 to pass through the cavity of the rotating shaft 1 and be electrically connected to the rotating end of the equipment. The rotating shaft 1 is coaxial with the rotating part and can rotate synchronously. The other end of the rotor end wire 8 is electrically connected to the conductive ring 4.

[0042] Mounting plate 5 is fixedly mounted on the fixing part of the device. In this embodiment, mounting plate 5 can be fixedly mounted on the housing of the rotary connector. The housing of the rotary connector is fixedly connected to the fixing part of the device, thereby realizing the fixed mounting of mounting plate 5 and the fixing part of the device. Rotary shaft 1 is rotatably mounted relative to mounting plate 5. In this embodiment, rotary shaft 1 can be rotatably mounted on the housing of the rotary connector via bearings, and rotary shaft 1 extends out of the housing of the rotary connector and is fixedly connected to the rotating part of the device.

[0043] The rolling assembly 6 is mounted on the mounting plate 5. The rolling assembly 6 includes an insulating sleeve 61, a ball bearing 62, a slider 63, a spring 64, and an insulating cover 65. The insulating sleeve 61 has openings at both ends, and one end of the insulating sleeve 61 has a constricted structure 611 near the opening, facing the conductive ring 4. The constricted structure 611 gradually slopes towards the axis of the insulating sleeve 61 in the direction near the opening (near the conductive ring 4), causing the inner diameter to gradually decrease.

[0044] A ball bearing 62 is disposed inside the insulating sleeve 61. A portion of the arc-shaped surface of the ball bearing 62 protrudes from the opening of the constriction structure 611 and is stopped by the inner wall of the constriction structure 611 to prevent the ball bearing 62 from falling out. In this embodiment, the radial cross-section of the constriction structure 611 is circular. The outer wall of the conductive ring 4 is provided with a V-shaped groove 41, and the ball bearing 62 is rolled within the V-shaped groove, achieving rolling contact between the conductive ring 4 and the ball bearing 62, thereby realizing electrical connection.

[0045] An insulating sleeve 61 is provided with a slider 63 that slides along the axial direction of the insulating sleeve 61. The outer wall of the slider 63 slides in contact with the inner wall of the insulating sleeve 61. The end of the slider 63 facing the ball 62 has a spherical groove 631, and a portion of the ball 62 is nested in the spherical groove 631 to limit the movement of the ball 62 and the slider 63. To avoid interference between the slider 63 and the inner wall of the constriction structure 611 during sliding, a variable diameter boss 632 with a gradually decreasing outer diameter protrudes from the side of the slider 63 facing the ball 62, and the spherical groove 631 is provided on the variable diameter boss 632.

[0046] A spring 64 is installed inside the insulating sleeve 61, with one end of the spring 64 abutting against the slider 63. An insulating cover 65 is installed at the end of the insulating sleeve 61 furthest from the closing structure 611, with the other end of the spring 64 abutting against the inner wall of the insulating cover 65. After the insulating cover 65 is installed, the spring 64 is pre-pressed within the insulating sleeve 61, applying elastic force to the slider 63 and the ball 62. During the rolling of the conductive ring 4, the ball 62 applies a certain pressure to the conductive ring 4, ensuring reliable contact between the conductive ring 4 and the ball 62. This prevents the ball 62 from disengaging from the conductive ring 4 due to vibration or other reasons, ensuring reliable power and signal transmission.

[0047] In this embodiment, the inner wall of the insulating cover 65 is provided with a limiting groove 651, and one end of the spring 64 is nested in the limiting groove 651 to prevent the spring 64 from swinging inside the insulating sleeve 61.

[0048] An insulating cover 65 is provided with a wire hole 652, and one end of the stator end wire 7 is electrically connected to the fixed part of the equipment. The stator end wire 7 passes through the wire hole 652 and the spring 64 in sequence and is directly electrically connected to the slider 63. Both the slider 63 and the ball 62 are made of conductive material. The slider 63 contacts the ball 62, thereby realizing the conductive connection between the stator end wire 7 and the ball 62.

[0049] To prevent the stator end wire 7 from contacting the spring 64 and affecting the conductivity, the stator end wire 7 passes through the center of the cavity in the middle of the spring 64. Since the vibration amplitude is small when the rotary connector is affected by vibration during operation, the sliding range of the slider 63 is small. It is only necessary to ensure that the ball 62 and the conductive ring 4 are in reliable contact. Therefore, the stator end wire 7 can have a small length margin in the spring 64. This not only prevents the stator end wire 7 from contacting the spring 64, but also prevents the stator end wire 7 from being pulled off.

[0050] The conductive contact of this rotary connector is a structure of conductive ring 4 + ball 62 + slider 63. The ball 62 makes rolling contact with the conductive ring 4 and slider 63. The spring 64 compresses and pre-tightens the slider 63, causing the ball 62 to contact the slider 63 and the V-groove 41 of the conductive ring 4 with a certain pressure, thereby achieving stable signal transmission and reducing signal fluctuations.

[0051] The slider 63 is electrically connected to the fixed part of the equipment through the stator end wire 7, and the conductive ring 4 is electrically connected to the rotating part of the equipment through the rotor end wire 8. The fixed part and the rotating part of the equipment are electrically connected through the rolling contact between the ball 62, the conductive ring 4, and the slider 63.

[0052] When the rotating part rotates, it drives the rotating shaft 1 to rotate, and the conductive ring 4 drives the ball 62 to roll. The spring 64 keeps the ball 62 in rolling contact with the conductive ring 4 and the slider 63, so as to realize the signal transmission between the fixed part and the rotating part of the equipment in the rotating state.

[0053] The rolling assembly 6 is fixed to the mounting plate 5 by the insulating sleeve 61. The mounting plate 5, the insulating sleeve 61, and the insulating cover 65 are all insulators. When two or more conductive rings 4 are axially distributed on the rotating shaft 1, adjacent conductive rings 4 are insulated by the insulating ring, effectively achieving insulation between adjacent rings in the rotor section. Correspondingly, the rolling assembly 6 is axially distributed on the mounting plate 5, and through the mounting plate 5, the insulating sleeve 61, and the insulating cover 65, effectively achieving insulation between adjacent rings in the stator section.

[0054] In this embodiment, the rotor end wire 8 is welded to the inner wall of the conductive ring 4, and the stator end wire 7 can also be fixed to the slider 63 by welding.

[0055] In the installation process of this utility model, the insulating ring and conductive ring 4 are sequentially sleeved on the rotating shaft 1, and the insulating ring on the outside of the rotating shaft 1 is axially limited and fixed. The rotor end wire 8 is passed through the rotating shaft 1, and the insulating ring and conductive ring 4 are welded and fixed, thereby realizing the installation of the rotor end of the rotary connector. The ball bearing 62, slider 63, and spring 64 are sequentially placed into the insulating sleeve 61, and then the insulating cover 65 is covered and fixed to assemble the rolling assembly 6. Then the rolling assembly 6 is placed on the mounting plate 5, thereby realizing the installation of the stator end of the rotary connector. When inserting the slider 63, the stator end wire 7 can be welded to the slider 63 beforehand. After the slider 63 is inserted, the spring 64 is sleeved on the stator end wire 7 and nested in the insulating sleeve 61. The above assembly process is simpler, and the various parts of the rolling assembly are easy to process, which can reduce the cost of the product.

[0056] The structural design of this invention avoids problems such as the difficulty in processing elastic rings, the inability to make the product's outer diameter too small, the difficulty in installing elastic rings, and the limitation on the number of rings, thus improving the convenience of processing and assembly and enabling multi-ring assembly. The use of rolling components enables partial assembly, reducing assembly difficulty and improving assembly efficiency.

[0057] In other embodiments of this utility model, improvements are made based on the above embodiments. The insulating ring is integrally formed, and the conductive ring 4 is inserted into the insulating ring by injection molding, in which case the conductive ring 4 is nested inside the insulating ring.

[0058] In other embodiments of this utility model, improvements are made based on the above embodiments. The ball bearing 62 can be replaced with a roller, which is a cylinder. Correspondingly, the radial cross-sectional shape of the constriction structure 611 is rectangular, and the spherical groove on the slider 63 is replaced with a cylindrical groove. Part of the circumferential surface and part of the end faces of the roller extend out of the opening of the constriction structure 611. The V-shaped groove 41 on the outer wall of the conductive ring 4 is replaced with a U-shaped groove, and the cylinder rolls on the bottom surface of the U-shaped groove; or, the outer wall of the conductive ring 4 is not grooved, and the roller rolls directly on the outer circumferential surface of the conductive ring 4. By setting the roller, the contact area between the roller and the conductive ring 4 can be increased, enhancing conductivity. In other embodiments, the ball bearing 62 can also be replaced with rolling elements of other shapes.

[0059] In other embodiments of this utility model, improvements are made based on the above embodiments. The outer circumferential surface of the conductive ring 4 may not be provided with a V-groove 41, and the ball bearing 62 is rolled on the outer circumferential surface of the conductive ring 4.

[0060] In other embodiments of this utility model, improvements are made based on the above embodiments. A limiting groove can also be provided on the side of the slider 63 facing the spring 64, and the end of the spring 64 is nested in the limiting groove to further restrict the spring 64 and ensure that the spring 64 extends and retracts normally.

[0061] In other embodiments of this utility model, improvements are made based on the above embodiments, and spring 64 can be replaced with other types of elastic elements such as disc springs.

[0062] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rolling rotary connector, comprising a mounting plate (5), a rotating shaft (1), a conductive ring (4) disposed on the rotating shaft (1), and an insulating ring, wherein the conductive ring (4) is electrically connected to a rotor end wire (8), characterized in that: A rolling assembly (6) is provided on the mounting plate (5). The rolling assembly (6) includes an insulating sleeve (61) provided on the mounting plate (5). A rolling element is provided inside the insulating sleeve (61). The rolling element extends out of the insulating sleeve (61) and rolls in contact with the conductive ring (4). A slider (63) that rolls in contact with the rolling element is also provided inside the insulating sleeve (61). An elastic element is pre-tightened inside the roller sleeve (61) and squeezes the slider (63) so that the rolling element and the conductive ring (4) have contact pressure. The slider (63) is electrically connected to the stator end wire (7).

2. A rolling rotary connector according to claim 1, characterized in that: The insulating sleeve (61) has a constriction structure (611) at one end facing the conductive ring (4). The inner diameter of the constriction structure (611) gradually decreases in the direction close to the conductive ring (4), so that the rolling element does not fall out of the insulating sleeve (61) while extending out of the insulating sleeve (61). The radial cross-sectional shape of the constriction structure (611) matches the radial cross-sectional shape of the rolling element.

3. A rolling rotary connector according to claim 2, characterized in that: The slider (63) is provided with a variable diameter boss (632) on the side facing the closing structure (611). The outer diameter of the variable diameter boss (632) gradually decreases in the direction close to the closing structure (611) to avoid interference with the inner wall of the closing structure (611).

4. A rolling rotary connector according to claim 1, characterized in that: The rolling element is a ball (62) or a roller.

5. A rolling rotary connector according to claim 4, characterized in that: When the rolling element is a ball (62), the outer wall of the conductive ring (4) is provided with a V-shaped groove (41), and the ball (62) rolls in the V-shaped groove; when the rolling element is a roller, the outer wall of the conductive ring (4) is provided with a U-shaped groove, and the roller rolls in cooperation with the bottom surface of the U-shaped groove.

6. A rolling rotary connector according to claim 4, characterized in that: When the rolling element is a ball (62), a spherical groove matching the rolling element is provided on the slider (63); when the rolling element is a roller, a cylindrical groove matching the rolling element is provided on the slider (63).

7. A rolling rotary connector according to claim 1, characterized in that: An insulating cover (65) is provided at one end of the insulating sleeve (61) away from the closing structure (611), and one end of the elastic element abuts against the slider (63) and the other end abuts against the insulating cover (65).

8. A rolling rotary connector according to claim 7, characterized in that: The inner wall of the insulating cover (65) is provided with a limiting groove (651) for nesting the end of the elastic element.

9. A rolling rotary connector according to claim 7, characterized in that: The slider (63) is provided with a limiting groove for nesting the end of the elastic element.

10. A rolling rotary connector according to claim 7, characterized in that: The insulating cover (65) is provided with a wire hole (652) for passing through the terminal wire (7).

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