Two-degree-of-freedom conductive slip ring

Abstract

The utility model discloses a two-degree-of-freedom conductive slip ring, and solves the problem that the single-degree-of-freedom rotation of a single-degree-of-freedom slip ring in the prior art is difficult to meet the complex requirement of multi-angle flexible movement of a holder. The double-degree-of-freedom conductive slip ring comprises a vertical shaft flange shell, a connecting shell and a transverse shaft flange shell, one end of the connecting shell is rotatably connected with the vertical shaft flange shell, the other end of the connecting shell is fixedly connected with the transverse shaft flange shell, and a vertical inner core assembly is arranged in the vertical shaft flange shell; a transverse inner core assembly is arranged in the transverse shaft flange shell, and the transverse shaft flange shell is connected with a rotor of the vertical inner core assembly. The horizontal shaft flange shell and the vertical shaft flange shell are connected through the connecting shell, when the horizontal shaft flange shell rotates, the vertical shaft rotor is driven to rotate through the connecting shaft, and an inner core part of the horizontal shaft flange shell can rotate around the center of the inner core part, so that the double-degree-of-freedom effect is achieved, and the complex requirement for multi-angle flexible movement of the cradle head is met.

Description

Technical Field

[0001] This utility model relates to the field of rotary connector technology, and in particular to a conductive slip ring. Background Technology

[0002] In the rapid development of modern industry and technology, conductive slip rings play an irreplaceable role as crucial precision power transmission devices. Their core function is to enable signal transmission between two relatively rotating mechanisms, making them particularly suitable for complex applications where power or data must be stably transmitted from a fixed position to a rotating position during continuous rotation. Whether in precision equipment in high-end manufacturing or cutting-edge equipment in the aerospace field, conductive slip rings play a key role in connection and transmission.

[0003] Existing single-degree-of-freedom slip rings, such as the split-combination conductive slip ring structure disclosed in Chinese Patent No. CN117791252A, only support single-degree-of-freedom rotation along the longitudinal axis, which is relatively limited in function and cannot meet the complex requirements of flexible multi-angle movement of the gimbal. Utility Model Content

[0004] To address the shortcomings in the aforementioned background technology, this utility model proposes a dual-degree-of-freedom conductive slip ring, which solves the problem that the single-degree-of-freedom rotation of the existing single-degree-of-freedom slip ring is difficult to meet the complex requirements of flexible multi-angle movement of the gimbal.

[0005] The technical solution of this utility model is implemented as follows: A dual-degree-of-freedom conductive slip ring includes a vertical axis flange shell, a connecting shell, and a horizontal axis flange shell. One end of the connecting shell is rotatably connected to the vertical axis flange shell, and the other end is fixedly connected to the horizontal axis flange shell. A vertical inner core assembly is provided inside the vertical axis flange shell, giving it rotational freedom in the vertical plane. A horizontal inner core assembly is provided inside the horizontal axis flange shell, giving it rotational freedom in the horizontal plane. The horizontal axis flange shell is connected to the rotor of the vertical inner core assembly. The connecting shell of this utility model connects the horizontal axis flange shell and the vertical axis flange shell. When the horizontal axis flange shell rotates, it drives the vertical axis rotor to rotate through the connecting shaft. The inner core component of the horizontal axis flange shell can rotate around its center, achieving a dual-degree-of-freedom effect and meeting the complex requirements of flexible multi-angle movement of the gimbal.

[0006] Further preferably, both the vertical inner core assembly and the horizontal inner core assembly include a rotor and a stator. The stator is disposed in the corresponding vertical or horizontal flange housing, and the rotor is located inside the stator and rotatably connected to the stator. A conductive mechanism is provided between the rotor and the stator to ensure stable current conduction or signal transmission during rotation.

[0007] Further preferably, the rotor is provided with several oblong holes and several winding grooves for winding wires, and the oblong holes are connected to the winding grooves; the stator is provided with a central through groove, and several wire routing grooves are provided along the axial direction on the outer wall of the stator; the conductive mechanism includes a rotor contact member disposed in the winding groove and a stator contact member disposed in the central through groove, and the stator contact member passes through the central through groove and contacts and engages with the rotor contact member.

[0008] Further preferably, the stator is a ring-shaped structure formed by two semi-circular shells, which are connected by stator screws and stator nuts. A through groove is provided in the middle of the corresponding two semi-circular shells. A stator key protrusion is provided on the outer wall of each of the two semi-circular shells, and an axial keyway is provided on the inner wall of both the vertical and horizontal flange shells. The stator key protrusion and the corresponding axial keyway are inserted and fitted together. Preferably, the stator contact element is a U-shaped element, and a copper lug ring is provided at the outer end of the U-shaped element.

[0009] Further preferably, an insulating retaining ring is provided between two adjacent rotor contacts to effectively avoid signal crosstalk. The rotor has a hollow structure, and the rotor and stator are rotatably connected by an inner core bearing. One end of the stator is provided with a corrugated spring between it and the corresponding vertical or horizontal flange housing, and the other end is limited in the vertical or horizontal flange housing by a snap ring.

[0010] In a further preferred embodiment, the vertical shaft flange housing and the connecting housing are rotatably connected by a large bearing, and the vertical shaft flange housing is provided with a bushing to limit the movement of the large bearing. A first sealing ring is also provided between the connecting housing and the vertical shaft flange housing to improve the sealing performance between the two.

[0011] In a further preferred embodiment, the bushing is connected to the lower part of the vertical shaft flange housing and located inside the connecting shell, and the bushing is provided with a headless screw that connects to the vertical shaft flange housing; to ensure that the bushing is stably connected to the vertical shaft flange housing and to stably limit the position of the large bearing.

[0012] Further preferably, the horizontal flange housing is provided with a connecting shaft, and the rotor bottom of the vertical inner core assembly is provided with a rotor drive groove that matches the connecting shaft; the horizontal flange housing is connected to the connecting shell by bolts, and a second sealing ring is provided between the horizontal flange housing and the connecting shell to improve the sealing performance between the two.

[0013] Further preferably, the closed end of the transverse flange housing is provided with a transverse end cover, and a third sealing ring is provided between the transverse end cover and the transverse flange housing; thereby improving the sealing performance between the two.

[0014] The beneficial effects of this utility model are as follows: This utility model connects the horizontal axis flange shell and the vertical axis flange shell through the connecting shell. When the horizontal axis flange shell rotates, it drives the rotor inside the corresponding vertical axis flange shell to rotate through the connecting shaft, realizing the relative rotation between the rotor and the stator of the vertical inner core component. The rotor of the horizontal inner core component of the horizontal axis flange shell can rotate around its center, so as to achieve a dual degree of freedom effect and meet the complex requirements of the gimbal's multi-angle flexible movement.

[0015] The vertical inner core assembly and the horizontal inner core assembly of this utility model are arranged vertically to realize bidirectional current conduction or signal transmission in both vertical and horizontal directions; moreover, the vertical inner core assembly and the horizontal inner core assembly are compact in design, simple in structure, and easy to install, which reduces the space occupied by the system and ensures stable current conduction or signal transmission during rotation. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional view of the conductive slip ring of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of the conductive slip ring of this utility model;

[0019] Figure 3 This is a front view schematic diagram of the inner core assembly of the conductive slip ring of this utility model;

[0020] Figure 4 This is a top view schematic diagram of the inner core assembly of the conductive slip ring of this utility model;

[0021] Figure 5 This is an exploded view of the inner core assembly structure of the conductive slip ring of this utility model;

[0022] Figure 6 This is an exploded view of the conductive slip ring of this utility model;

[0023] Figure 7 This is a schematic diagram of the axial keyway arrangement on the inner wall of the transverse flange housing of this utility model;

[0024] Figure 8 This is a schematic diagram showing the fit between the axial keyway of the transverse flange housing and the stator key protrusion of this utility model;

[0025] Figure 9 This is a front view of the axial keyway and stator key protrusion mating of the transverse flange housing of this utility model;

[0026] Figure 10 This is a schematic diagram of the stator contact component of this utility model;

[0027] Figure 11 This is a schematic diagram of the operation of an embodiment of the conductive slip ring of this utility model in Example 4;

[0028] Figure 12 This is a schematic diagram of the operation of an embodiment of the conductive slip ring of this utility model in Example 5. Detailed Implementation

[0029] 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.

[0030] Example 1, such as Figure 1 , 2 As shown, a two-degree-of-freedom conductive slip ring includes a vertical flange housing 1, a connecting housing 2, and a horizontal flange housing 3; Figure 1 For example, the vertical shaft flange housing 3 is vertically positioned, and the horizontal shaft flange housing 3 is horizontally positioned, with their central axes perpendicular to each other. One end of the connecting shell 2 is rotatably connected to the vertical shaft flange housing 1, and the other end is fixedly connected to the horizontal shaft flange housing 3, thus connecting the vertical shaft flange housing 1 and the horizontal shaft flange housing 3. The horizontal shaft flange housing and the connecting shell rotate together relative to the vertical shaft flange housing. The vertical shaft flange housing 1 has a vertical inner core assembly 41, giving it rotational freedom in the vertical plane; the horizontal shaft flange housing 3 has a horizontal inner core assembly 42, giving it rotational freedom in the horizontal plane; the horizontal shaft flange housing 3 is connected to the rotor 401 of the vertical inner core assembly 41. Both the horizontal inner core assembly 42 and the vertical inner core assembly are inner core assemblies. The connecting shell connects the horizontal axis flange shell and the vertical axis flange shell. When the horizontal axis flange shell rotates, it drives the rotor 401 of the vertical inner core assembly 41 to rotate. The horizontal inner core assembly inside the horizontal axis flange shell can rotate around its center, and the vertical inner core assembly 41 inside the vertical axis flange shell 1 can rotate around its center, so as to achieve a dual degree of freedom effect and meet the complex requirements of the gimbal's flexible multi-angle movement.

[0031] like Figure 3As shown, the vertical inner core assembly 41 and the horizontal inner core assembly 42 described in this embodiment have similar structures. They both include a rotor 401 and a stator 404. The stator 404 is disposed in the corresponding vertical shaft flange housing 1 or horizontal shaft flange housing 3. The rotor 401 is located inside the stator 404 and is rotatably connected to the stator 404. A conductive mechanism is provided between the rotor 401 and the stator 404 to ensure stable current conduction or signal transmission during rotation.

[0032] Example 2 provides a dual-degree-of-freedom conductive slip ring, further optimized from Example 1. In this example, the rotor 401 has several oblong holes 411 and several winding grooves 414 for winding wires. The oblong holes 411 and the winding grooves 414 are connected. The wires inside the rotor 401 pass through the oblong holes and are wound in the winding grooves, ensuring that the rotor wires can be smoothly and properly wound on the rotor. The stator 404 has a central through slot 413, and several axial routing grooves 410 are provided on the outer wall of the stator 404. After the wires are connected to the customized contact 402, they can be placed in the routing grooves 410, ensuring that the stator wires can be smoothly and properly arranged on the stator. The conductive mechanism includes a rotor contact 402 disposed in a winding groove 414 and a stator contact 405 disposed in an intermediate through groove 413. The stator contact 405 passes through the intermediate through groove 413 and engages with the rotor contact 402. The rotor contact 402 presses and fixes the wire wound in the winding groove 414. One end of the stator contact 405 contacts the rotor contact 402, and the other end connects to the stator wire. The contact can be made of copper-based, silver-based, or gold-based materials with strong conductivity to ensure stable current conduction or signal transmission between the stator and rotor components.

[0033] This embodiment is a preferred solution, such as Figure 3 , 4 As shown, the stator 404 is a ring-shaped sleeve structure formed by two semi-circular shells. The two semi-circular shells are connected by stator screws 406 and stator nuts 407 to achieve quick assembly. A central through slot 413 is provided in the middle of the corresponding two semi-circular shells; that is, a complete stator has two central through slots, and each central through slot contains a corresponding set of stator contacts. Stator key protrusions 409 are provided on the outer walls of both semi-circular shells, and axial keyways 101 are provided on the inner walls of both the vertical shaft flange shell 1 and the horizontal shaft flange shell 3. The stator key protrusions 409 are inserted into the corresponding axial keyways 101, as shown in the diagram. Figure 7 , 8 As shown in Figures 9 and 1, in order to achieve circumferential limiting connection between the stator and the corresponding housing, taking the vertical shaft flange housing as an example, the internal stator can rotate synchronously with the vertical shaft flange housing, and the internal rotor remains relatively stationary, thus achieving relative rotation between the stator and the rotor.

[0034] This embodiment is a preferred solution, such as Figure 10As shown, the stator contact 405 is a U-shaped component, which forms two contact points with the rotor contact to ensure smooth transmission of current or signals. A copper lug 412 is provided at the outer end of the U-shaped component. The stator wires are connected to the stator contact through the copper lug.

[0035] Example 3, as Figure 5 As shown, a dual-degree-of-freedom conductive slip ring is further optimized based on embodiment 1 or 2. In this embodiment, an insulating retaining ring 403 is provided between two adjacent rotor contact elements 402, and each rotor contact element 402 is electrically isolated by the insulating retaining ring 403 to effectively avoid signal crosstalk. The rotor 401 has a hollow structure to facilitate the smooth passage of rotor wires. The rotor 401 and the stator 404 are rotatably connected by an inner core bearing 7, with two inner core bearings 7 arranged vertically. The bottom of the vertical shaft flange housing 1 is provided with a positioning step, and the bottom inner core bearing 7 is positioned by the positioning step. A corrugated spring 11 is provided between one end of the stator 404 and the corresponding vertical shaft flange housing 1 or horizontal shaft flange housing 3; the other end is limited in the vertical shaft flange housing 1 or horizontal shaft flange housing 3 by a snap ring 6. Specifically, the bottom of the vertical shaft flange housing 1 and the horizontal shaft flange housing 3 is provided with a groove, and the corrugated spring 11 is installed in the groove. The corrugated spring continuously provides a certain holding force to the stator 404. The top of the vertical shaft flange housing 1 is provided with a retaining ring groove, in which the retaining ring 6 is installed to provide axial positioning for the stator 404; at the same time, the top of the vertical shaft flange housing 1 is also provided with an external end face sealing ring 5; the top of the horizontal shaft flange housing 1 is also provided with an external end face sealing ring 5 to improve the sealing performance of the connection with the equipment.

[0036] In this embodiment, the vertical shaft flange housing 1 and the connecting housing 2 are rotatably connected by a large bearing 10. The vertical shaft flange housing 1 is provided with a bushing 9 to limit the movement of the large bearing 10; specifically, the inner ring of the large bearing 10 is positioned by the bushing 9, and the outer ring of the large bearing 10 is positioned by the internal boss of the horizontal shaft flange housing 3. A first sealing ring 8 is also provided between the connecting housing 2 and the vertical shaft flange housing 1 to seal the gap at the joint between the connecting housing 2 and the vertical shaft flange housing 1, ensuring its sealing performance. The bushing 9 is connected to the lower part of the vertical shaft flange housing 1 and located inside the connecting housing 2. The bushing 9 is provided with a headless screw 20 that connects to the vertical shaft flange housing 1. That is, the outer diameter of the vertical shaft flange housing has evenly distributed threaded holes, and the bushing 9 is fastened to the vertical shaft flange housing 1 through the threaded engagement of the headless screw 20 with the threaded holes.

[0037] like Figure 6As shown, in this embodiment, the horizontal flange housing 3 is provided with a connecting shaft 17, and the rotor 401 of the vertical inner core assembly 41 has a rotor drive groove 408 at its bottom that matches the connecting shaft 17. The horizontal flange housing 3 is connected to the connecting housing 2 by bolts, which can be screws. The connecting shaft 17 is mounted on the horizontal connecting housing 3 by screws. The connecting shaft 17 passes through the rotor groove 408 on the internal rotor 401 of the vertical connecting housing 1, forming a transmission structure, thereby enabling the internal rotor 401 of the vertical connecting housing 1 to rotate synchronously when the horizontal connecting housing 3 rotates. In this embodiment, a second sealing ring 12 is provided between the horizontal flange housing 3 and the connecting housing 2 to improve the sealing performance between them. The flange on the horizontal flange housing 3 and the flange on the connecting housing 2 are connected and fixed by screws 19 and a fixing nut 18.

[0038] In this embodiment, the closed end of the transverse flange housing 3 is provided with a transverse end cap 15, and a third sealing ring 14 is provided between the transverse end cap 15 and the transverse flange housing 3; thus, a sealing structure is constructed to ensure the sealing performance of the connection. The sealing ring can be made of materials such as nitrile rubber; a transverse end face sealing ring 16 is provided on the left end face of the transverse flange housing 3, which provides sealing protection for the corresponding connection parts.

[0039] Example 4, as Figure 11 As shown, a dual-degree-of-freedom conductive slip ring, based on Embodiment 3, is illustrated in the schematic diagram of one embodiment of this utility model. The mounting surfaces of the vertical axis flange housing 1 and the horizontal axis flange housing 3 are respectively mounted on the mounting panels of Equipment I 100 and Equipment II 200, achieving dual-degree-of-freedom rotation. When Equipment II rotates around the center of the horizontal axis flange housing 3, rotational conductivity is achieved through the inner core component 4 within the horizontal axis flange housing 3. When Equipment II as a whole rotates around the center of the vertical axis flange housing 1, it rotates together with the horizontal axis flange housing 3 and the connecting shell 2, achieving rotational conductivity by driving the rotor 401 inside the vertical axis flange housing 1 to rotate through the connecting shaft 17. This achieves dual-degree-of-freedom rotation, namely rotation around the center of the horizontal axis flange housing 3 and rotation around the center of the vertical axis flange housing 1.

[0040] Example 5, as Figure 12As shown, this is a schematic diagram of another embodiment of a dual-degree-of-freedom conductive slip ring, based on embodiment 3. During installation, the top of the vertical shaft flange housing 1 is first mechanically connected to the mounting panel of device I 100, and then the entire horizontal shaft assembly is placed inside device II 200. The output wire inside the entire vertical shaft assembly is welded to the input wire inside the entire horizontal shaft assembly, and the connection can be protected with heat shrink tubing or solder rings. In this invention, the mounting panel of device II is positioned between the connecting flange of the connecting shell 2 and the connecting flange of the horizontal shaft flange housing 3. The mechanical connection of the three is achieved through the fastening combination of the connecting shell nut 18 and the screw 19. This connection structure design, combined with the synergistic effect of the internal components of the conductive slip ring, achieves a dual-degree-of-freedom rotation function.

[0041] In this embodiment, when the device II has a rotating mechanism inside, the rotating mechanism can rotate around the central axis of the horizontal flange housing 3, and achieve rotational conductivity through the inner core component 4 inside the flange housing 3. The device II itself can rotate around the central axis of the vertical flange housing 1, and rotates together with the horizontal flange housing 3 and the connecting housing 2. The rotor 401 inside the vertical flange housing 1 is driven to rotate through the connecting shaft 17 to achieve rotational conductivity. This achieves two degrees of freedom of rotation, namely, rotation around the center of the horizontal flange housing 3 and rotation around the center of the vertical flange housing 1.

[0042] It is understood that the various numerical designations used in the embodiments of this utility model are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. Furthermore, in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "top," and "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A two-degree-of-freedom conductive slip ring, characterized in that: It includes a vertical shaft flange housing (1), a connecting housing (2) and a horizontal shaft flange housing (3). One end of the connecting housing (2) is rotatably connected to the vertical shaft flange housing (1) and the other end is fixedly connected to the horizontal shaft flange housing (3). The vertical shaft flange housing (1) is provided with a vertical inner core assembly (41) and the horizontal shaft flange housing (3) is provided with a horizontal inner core assembly (42). The horizontal shaft flange housing (3) is connected to the rotor (401) of the vertical inner core assembly (41).

2. The dual-degree-of-freedom conductive slip ring according to claim 1, characterized in that: Both the vertical inner core assembly (41) and the horizontal inner core assembly (42) include a rotor (401) and a stator (404). The stator (404) is disposed in the corresponding vertical flange housing (1) or horizontal flange housing (3). The rotor (401) is located inside the stator (404) and is rotatably connected to the stator (404). A conductive mechanism is provided between the rotor (401) and the stator (404).

3. The dual-degree-of-freedom conductive slip ring according to claim 2, characterized in that: The rotor (401) is provided with several waist-shaped holes (411) and several winding grooves (414) for winding wires. The waist-shaped holes (411) are connected to the winding grooves (414). The stator (404) is provided with a central through groove (413). The outer wall of the stator (404) is provided with several wire routing grooves (410) along the axial direction. The conductive mechanism includes a rotor contact (402) disposed in the winding groove (414) and a stator contact (405) disposed in the central through groove (413). The stator contact (405) passes through the central through groove (413) and contacts and engages with the rotor contact (402).

4. The dual-degree-of-freedom conductive slip ring according to claim 3, characterized in that: The stator (404) is a ring-shaped structure formed by two semi-circular shells. The two semi-circular shells are connected by stator screws (406) and stator nuts (407). The middle through groove (413) is set in the middle of the corresponding two semi-circular shells. The outer walls of the two semi-circular shells are provided with stator key protrusions (409). The inner walls of the vertical shaft flange shell (1) and the horizontal shaft flange shell (3) are provided with axial keyways (101). The stator key protrusions (409) are inserted into the corresponding axial keyways (101).

5. The dual-degree-of-freedom conductive slip ring according to claim 3 or 4, characterized in that: The stator contact (405) is a U-shaped part, and the outer end of the U-shaped part is provided with a copper nose ring (412).

6. The dual-degree-of-freedom conductive slip ring according to claim 5, characterized in that: An insulating retaining ring (403) is provided between two adjacent rotor contact parts (402). The rotor (401) is a hollow structure. The rotor (401) and the stator (404) are rotatably connected by an inner core bearing (7). One end of the stator (404) is provided with a corrugated spring (11) between it and the corresponding vertical shaft flange housing (1) or horizontal shaft flange housing (3). The other end is limited in the vertical shaft flange housing (1) or horizontal shaft flange housing (3) by a snap ring (6).

7. The dual-degree-of-freedom conductive slip ring according to claim 1 or 6, characterized in that: The vertical shaft flange housing (1) and the connecting housing (2) are rotatably connected by a large bearing (10). The vertical shaft flange housing (1) is provided with a bushing (9) to limit the large bearing (10). A first sealing ring (8) is also provided between the connecting housing (2) and the vertical shaft flange housing (1).

8. The dual-degree-of-freedom conductive slip ring according to claim 7, characterized in that: The bushing (9) is connected to the lower part of the vertical shaft flange housing (1) and located inside the connecting shell (2). The bushing (9) is provided with a headless screw (20) that connects to the vertical shaft flange housing (1).

9. The dual-degree-of-freedom conductive slip ring according to claim 1 or 8, characterized in that: The horizontal flange housing (3) is provided with a connecting shaft (17), and the rotor (401) of the vertical inner core assembly (41) has a rotor drive groove (408) at the bottom that matches the connecting shaft (17); the horizontal flange housing (3) is connected to the connecting shell (2) by bolts, and a second sealing ring (12) is provided between the horizontal flange housing (3) and the connecting shell (2).

10. The dual-degree-of-freedom conductive slip ring according to claim 9, characterized in that: The closed end of the horizontal shaft flange housing (3) is provided with a horizontal shaft end cover (15), and a third sealing ring (14) is provided between the horizontal shaft end cover (15) and the horizontal shaft flange housing (3).

Images