Via hole type conductive slip ring with adjustable contact pressure

Abstract

The utility model discloses a via hole type conductive slip ring with adjustable contact pressure, and solves the problem that the use of a rotary connector is affected due to the non-adjustable contact pressure between rotary transmission members in the prior art. The contact pressure adjustable via hole type conductive slip ring comprises a housing and a rotor rotatably arranged in the housing, the rotor is provided with a rotor contact member, the housing is internally provided with a pressure adjusting column used for supporting and limiting the stator contact member, and the pressure adjusting column corresponds to a pressure adjusting assembly arranged in the housing; under the action of the pressure adjusting assembly, the pressure adjusting column drives the stator contact piece to be tightly pressed on the rotor contact piece. According to the utility model, the conductive slip ring can be adjusted according to the wear degree through the adjustable design of the contact pressure between the rotor contact element and the stator contact element, thereby ensuring that the rotor contact element and the stator contact element always keep a good contact state, improving the contact reliability of the conductive slip ring, and further improving the quality of the rotary connector. The mechanical life is obviously prolonged.

Description

Technical Field

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

[0002] In the rapid development of modern industry and technology, conductive slip rings, as a crucial precision power transmission device, play an irreplaceable role. 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 conductive slip rings, such as the split-combination conductive slip ring structure disclosed in Chinese Patent Application Publication No. CN117791252A, can standardize not only the mounting plate component and shaft component, but also the metal end caps and housing at both ends, achieving structural and component standardization. However, the connection between the brush bristles and the conductive ring is fixed. As rotation progresses, the brush bristles wear down, leading to problems such as poor contact and uneven transmission, making it difficult to meet the long service life requirements of rotary connectors. Utility Model Content

[0004] To address the shortcomings in the aforementioned background technology, this utility model proposes a through-hole conductive slip ring with adjustable contact pressure, which solves the problem in the prior art where the contact pressure between rotating transmission components is not adjustable, thus affecting the use of rotary connectors.

[0005] The technical solution of this utility model is achieved as follows: A through-hole conductive slip ring with adjustable contact pressure includes a housing and a rotor rotatably disposed within the housing. The rotor is provided with rotor contacts, and the housing contains a pressure regulating column for supporting and limiting stator contacts. The pressure regulating column corresponds to a pressure regulating assembly disposed within the housing. Under the action of the pressure regulating assembly, the pressure regulating column causes the stator contacts to press against the rotor contacts. That is, the pressure regulating assembly drives the stator contacts to move relative to the rotor contacts via the pressure regulating column, thereby adjusting the pressure between the stator and rotor contacts, thus achieving adjustable contact pressure between the rotating transmission components in the through-hole conductive slip ring.

[0006] Further preferably, the outer casing includes a housing and end caps fixed at the upper and lower ends of the housing. The two ends of the pressure regulating column are slidably engaged with the end caps. The housing contains N groups of stator contact components, where N is a positive integer greater than or equal to 2. Each group of stator contact components includes several stator contact components, and the two ends of the stator contact components in the same group are connected to two corresponding pressure regulating columns. Moving the pressure regulating columns on both sides of the stator contact component moves the stator contact component, thereby adjusting the pressure relative to the rotor contact component.

[0007] Further optimization involves interleaving the stator contacts of the N groups of stator contacts with the rotor contacts. These staggered stator contacts are sandwiched outside their corresponding rotor contacts; this improves contact reliability while reducing wear, lowering contact resistance, improving conductivity, and ensuring the stability and reliability of current transmission.

[0008] Further preferably, the pressure regulating assembly includes a fixed column with a horizontally arranged adjusting pressure screw. The adjusting pressure screw is limited on the fixed column by a limiting nut, and the adjusting pressure screw corresponds to a pressure regulating boss provided on the pressure regulating column. Rotating the adjusting pressure screw adjusts its extension length, pushing the pressure regulating boss to move, and the pressure regulating column drives the stator contact to move relative to the rotor contact.

[0009] Further preferably, the end cover is provided with a sliding groove and a fixing groove, two adjacent pressure regulating columns are slidably located in the sliding groove, and the fixing column is located in the fixing groove and is fixedly connected to the end cover by fixing screws; the end cover is also provided with a wire outlet waist-shaped hole and a positioning step, and a bearing is provided between the positioning step and the rotor to ensure the stability and smooth rotation of the rotor.

[0010] Further preferably, the stator contact includes an integrally formed intermediate main contact portion and a contact foot portion, the contact foot portion is disposed at both ends of the intermediate main contact portion, and a positioning protrusion is provided on the outer side of the intermediate main contact portion, the positioning protrusion being used for connecting wires.

[0011] Further preferably, the intermediate main contact part includes a figure-eight shaped rod, the upper end of which is connected by a crossbar, and the contact foot is located at the lower end of the figure-eight shaped rod. The positioning protrusion is located at the center of the outer side of the crossbar. The pressure regulating column is provided with a row of positioning holes, and the contact foot is inserted into the positioning holes.

[0012] Further preferably, the key post has threaded holes at both its upper and lower ends, and the end cap is connected to the housing by end cap screws that match the threaded holes; to ensure a stable connection between the end cap and the housing.

[0013] Further preferably, the outer wall of the rotor is provided with a plurality of concentric positioning ring grooves, and a wire-passing hole is provided in the concentric positioning ring groove. The rotor contact is set in the corresponding concentric positioning ring groove, and an insulating retaining ring is provided between two adjacent rotor contact pieces. The setting of the insulating retaining ring can ensure that the rotor contact piece has a good insulation effect with the adjacent rotor contact piece.

[0014] In a further preferred embodiment, the upper part of the rotor is provided with a plurality of fixing holes along the circumference, and locking screws are threaded into the fixing holes for fixing to the equipment shaft.

[0015] The beneficial effects of this invention are as follows: The conductive slip ring of this invention features an adjustable contact pressure design between the rotor and stator contacts, allowing for adjustments based on wear levels. This ensures that the rotor and stator contacts maintain good contact at all times, preventing signal transmission interruptions or instability due to poor contact. Adjusting the contact pressure optimizes the contact resistance between the rotor and stator contacts; appropriate contact pressure keeps the contact resistance at a low level, thereby reducing signal loss and interference during transmission and improving the accuracy and stability of signal transmission. The movable stator contacts achieve a reasonable contact pressure with the rotor contacts, which reduces friction between the brushes and the slip ring, decreasing the wear rate. Excessive wear due to excessive contact pressure is avoided, thus extending the overall service life of the conductive slip ring.

[0016] This invention utilizes the simple rotation of an adjusting pressure screw to adjust the pressure regulating column. Combined with a special design for the stator contacts, it simplifies the adjustment of the contact pressure between the stator and rotor contacts. The adjustment method is simple and effective, the structure is compact, and it improves the contact reliability of the conductive slip ring, thereby improving the quality of the rotary connector and significantly extending its mechanical life. The adjustable contact pressure allows the conductive slip ring to maintain a suitable contact state under different operating conditions, reducing fatigue damage to the brush and slip ring materials caused by frequent changes in contact pressure. The adjustable contact pressure design allows the same conductive slip ring to adapt to various different working environments and load conditions, improving the system's versatility and flexibility. If the contact pressure is found to be unsuitable during equipment operation, it can be easily adjusted without replacing the entire conductive slip ring. This adjustability greatly reduces maintenance costs and equipment downtime. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a cross-sectional view of the overall structure of the conductive slip ring of this utility model;

[0019] Figure 2 This is an overall external view of the conductive slip ring of this utility model;

[0020] Figure 3 This is a schematic diagram of the conductive slip ring of this utility model without its outer shell.

[0021] Figure 4 This is an exploded view of the conductive slip ring of this utility model;

[0022] Figure 5 This is a front view schematic diagram of the inner core assembly of the conductive slip ring of this utility model;

[0023] Figure 6 This is a top view of the end cap of the conductive slip ring of this utility model;

[0024] Figure 7 This is a schematic diagram showing the fit between the end cap and the pressure regulating column of the conductive slip ring of this utility model.

[0025] Figure 8 This is a schematic diagram showing the cooperation between the pressure regulating component and the pressure regulating column of this utility model;

[0026] Figure 9 This is a schematic diagram of the stator contact component of this utility model. Detailed Implementation

[0027] 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.

[0028] Example 1, as Figure 1 , 2As shown, a through-hole conductive slip ring with adjustable contact pressure is disclosed. In this embodiment, the through-hole conductive slip ring includes a housing 3 and a rotor 1 rotatably disposed within the housing 3, with the rotor and housing coaxially aligned. The rotor 1 is provided with rotor contact elements 5, and multiple rotor contact elements 5 are axially distributed on the rotor 1. A pressure adjusting column 7 for supporting and limiting stator contact elements 4 is provided within the housing 3. The rotor contact elements 5 and stator contact elements 4 form the inner core assembly of the conductive slip ring. The pressure adjusting column connects and supports both ends of the stator contact elements 4. The pressure adjusting column 7 corresponds to a pressure adjusting assembly disposed within the housing 3. The pressure adjusting assembly can drive the pressure adjusting column, thereby causing the stator contact elements to move. Under the action of the pressure adjusting assembly, the pressure adjusting column 7 causes the stator contact elements 4 to press against the rotor contact elements 5. Specifically, the pressure adjusting assembly drives the stator contact elements to move relative to the rotor contact elements through the pressure adjusting column, thereby adjusting the pressure between the stator and rotor contact elements, thus realizing the adjustable contact pressure between the rotating transmission components in the through-hole conductive slip ring.

[0029] In this embodiment, the outer casing 3 includes a housing 31 and end caps 8 fixed at the upper and lower ends of the housing 31. The end caps seal the upper and lower ends of the housing and are connected to the rotor in conjunction with the bearings 9. The two ends of the pressure regulating column 7 are slidably engaged with the end caps 8. Specifically, the end caps 8 are provided with sliding grooves 801, and the upper and lower ends of the pressure regulating column 7 are located in the corresponding sliding grooves. Under the action of the pressure regulating assembly, the pressure regulating column 7 can move in the sliding grooves.

[0030] As a preferred option, such as Figure 3 , 8 As shown, the pressure regulating assembly in this embodiment includes a fixed post 2, with one pressure regulating post corresponding to one fixed post. The fixed post 2 is provided with a horizontally arranged adjusting pressure screw 10, which is limited to the fixed post 2 by a limiting nut 11. The adjusting pressure screw 10 corresponds to a pressure regulating boss 701 provided on the pressure regulating post 7. Rotating the adjusting pressure screw clockwise causes it to gradually extend out of the fixed post and then push against the pressure regulating boss. The pressure regulating boss gradually pushes the pressure regulating post to move, causing the stator contact components to perform corresponding actions, thereby adjusting the contact pressure between the stator contact components and the rotor contact components. The limiting nut 11 is fixed to the fixed post 2, or the limiting nut is not fixed to the fixed post but directly threaded onto the adjusting pressure screw 10. In this case, a spring 13 can be provided between the limiting nut and the fixed post, acting as a spring washer to continuously provide a certain holding force to the threaded connection.

[0031] like Figure 6As shown, in this embodiment, the end cover 8 is provided with a sliding groove 801 and a fixing groove 802. Two adjacent pressure regulating columns 7 are slidably located in the same sliding groove 801, simplifying the structural design and improving the compactness of the device. The fixing column 2 is located in the fixing groove 802 and is fixedly connected to the end cover 8 by fixing screws 15; that is, the upper and lower ends of the fixing column 2 are provided with fastening screw holes 201, and the fixing screws 15 are threaded into the fastening screw holes 201 to fix the fixing column. The end cover 8 is also provided with a wire outlet waist-shaped hole 803 and a positioning step 804. The wire outlet waist-shaped hole 803 facilitates the lead-out of internal circuits, and a bearing 9 is provided between the positioning step 804 and the rotor 1. The bearing 9 is positioned by the positioning step.

[0032] Example 2, as Figure 4 , 5 As shown, a through-hole conductive slip ring with adjustable contact pressure is further optimized based on embodiment 1. In this embodiment, the housing 31 is provided with N sets of stator contact groups, where N is a positive integer greater than or equal to 2. Taking N=2 as an example, each set of stator contact groups includes several stator contact elements 4. The two ends of the stator contact elements in the same set are connected to two corresponding pressure adjusting columns 7, that is, one set of stator contact elements corresponds to two pressure adjusting columns. The two sets of stator contact groups are located on both sides of the rotor, and there is a certain pressure between the stator contact elements 4 and the rotor contact elements 5, forming a holding contact with the rotor contact elements on the rotor. Preferably, the stator contact elements 4 of the two sets of stator contact groups are arranged crosswise relative to the rotor contact elements 5. That is, the stator contact elements are staggered and clamped on the outside of the corresponding rotor contact elements; this improves contact reliability while reducing wear; reduces contact resistance, improves conductivity, and ensures the stability and reliability of current transmission.

[0033] like Figure 9 As shown, the stator contact 4 in this embodiment includes an integrally formed intermediate main contact portion 41 and contact feet 42. The contact feet 42 are located at both ends of the intermediate main contact portion 41 and are used to connect with the pressure regulating column 7. The inner side of the intermediate main contact portion 41 contacts the rotor contact. A positioning protrusion 43 is provided on the outer side of the intermediate main contact portion 41, which acts as a copper lug for wire connection. In this embodiment, two keyposts 301 are symmetrically arranged on the inner wall of the housing 31. Under normal conditions, the positioning protrusions on multiple stator contacts in the same group are all in the same direction as the corresponding keyposts, serving to position and limit the stator contacts. It should be noted that the positioning protrusions may not be in the same direction as the keyposts, and this does not affect the installation of the stator contacts.

[0034] like Figure 7 , 8As shown in the preferred embodiment, the intermediate main contact portion 41 includes a figure-eight shaped rod, the upper end of which is connected by a crossbar. The figure-eight shaped rod is used for pressure contact with the rotor contact element. The contact foot portion 42 is located at the lower end of the figure-eight shaped rod, and the positioning protrusion 43 is located at the center of the outer side of the crossbar. The pressure adjusting column 7 is provided with a row of positioning holes 702, and the contact foot portion 42 is inserted into the positioning holes 702. That is, both ends of the stator contact element 4 are supported by the positioning holes 702 on the pressure adjusting column 7 and are axially positioned by the insulating retaining ring 6. When adjusting the pressure of the stator contact 4 on the rotor contact 5: the pressure adjusting screw 10 is rotated inward (clockwise) to push the pressure adjusting boss 701, and the pressure adjusting column 7 slides inward along the sliding groove 801 in the end cover 8, causing the stator contact 4 to move toward the rotor contact 5. After contact, it continues to slide along the sliding groove 801, and the angle at which the contact feet at both ends of the stator contact 4 are spread gradually increases, increasing the contact force between the stator contact 4 and the rotor contact 5. When the pressure adjusting screw 10 is rotated outward (counterclockwise), the pressure adjusting column boss 701 slides outward along the pressure adjusting column sliding groove 801, causing the stator contact 4 to move away from the rotor contact 5, and the angle between the contact feet at both ends of the stator contact 4 gradually decreases, reducing the contact force between the stator contact 4 and the rotor contact 5.

[0035] In this embodiment, the key post 301 has threaded holes 302 at both the upper and lower ends. The end cap 8 is connected to the housing 31 by end cap screws 12 that match the threaded holes 302, thus achieving a fixed connection between the end cap and the housing.

[0036] In this embodiment, the outer wall of the rotor 1 is provided with several concentric positioning ring grooves 103, and a wire-passing hole 102 is provided in the concentric positioning ring groove. The wire passes through the wire-passing hole 102 and is pressed by the rotor contact 5. The rotor contact 5 is set in the corresponding concentric positioning ring groove 103 to ensure its stability. An insulating retaining ring 6 is provided between two adjacent rotor contact 5s. The outer diameter of the insulating retaining ring 6 is larger than the outer diameter of the rotor contact 5, and the inner diameter of the insulating retaining ring 6 is tightly fitted with the outer diameter of the rotor 1. During assembly, insulating glue can be applied to fix it, ensuring good insulation between the rotor contact 5 and the adjacent rotor contact 5.

[0037] In this embodiment, the upper part of the rotor 1 is provided with a plurality of fixing holes 101 along the circumferential direction, and the fixing holes 101 are internally threaded with locking screws 14; the locking screws 14 rotate through the fixing holes 101 and are fixed to the equipment shaft to achieve a firm connection with the equipment shaft.

[0038] This invention features an adjustable contact pressure design between the rotor and stator contacts, allowing adjustment based on wear levels to ensure consistent and reliable contact between the brushes and slip rings. This prevents signal transmission interruptions or instability caused by poor contact. Adjusting the contact pressure optimizes the contact resistance between the rotor and stator contacts; appropriate pressure keeps this resistance low, reducing signal loss and interference, improving accuracy and stability, and ultimately enhancing the quality of the rotary connector and significantly extending its mechanical lifespan.

[0039] 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 through-hole conductive slip ring with adjustable contact pressure, comprising a housing (3) and a rotor (1) rotatably disposed within the housing (3), characterized in that: The rotor (1) is provided with a rotor contact (5), and the housing (3) is provided with a pressure regulating column (7) for supporting and limiting the stator contact (4). The pressure regulating column (7) corresponds to the pressure regulating assembly provided in the housing (3). Under the action of the pressure regulating assembly, the pressure regulating column (7) drives the stator contact (4) to press against the rotor contact (5).

2. The through-hole conductive slip ring with adjustable contact pressure according to claim 1, characterized in that: The outer casing (3) includes a housing (31) and end caps (8) fixed at the upper and lower ends of the housing (31). The two ends of the pressure regulating column (7) are respectively slidably engaged with the end caps (8). The housing (31) is provided with N sets of stator contact components, where N is a positive integer greater than or equal to 2. Each set of stator contact components includes several stator contact components (4). The two ends of the stator contact components in the same set are connected to the two corresponding pressure regulating columns (7).

3. The through-hole conductive slip ring with adjustable contact pressure according to claim 2, characterized in that: The stator contacts (4) of the N-group stator contacts are arranged in a cross configuration relative to the rotor contacts (5).

4. The through-hole conductive slip ring with adjustable contact pressure according to claim 2 or 3, characterized in that: The pressure regulating assembly includes a fixed column (2), on which a horizontally arranged adjusting pressure screw (10) is provided. The adjusting pressure screw (10) is limited on the fixed column (2) by a limiting nut (11), and the adjusting pressure screw (10) corresponds to the pressure regulating boss (701) provided on the pressure regulating column (7).

5. The through-hole conductive slip ring with adjustable contact pressure according to claim 4, characterized in that: The end cover (8) is provided with a sliding groove (801) and a fixing groove (802). Two adjacent pressure regulating columns (7) are slidably located in the sliding groove (801), and the fixing column (2) is located in the fixing groove (802) and is fixedly connected to the end cover (8) by fixing screws (15). The end cover (8) is also provided with a wire outlet waist-shaped hole (803) and a positioning step (804). A bearing (9) is provided between the positioning step (804) and the rotor (1).

6. The through-hole conductive slip ring with adjustable contact pressure according to any one of claims 2, 3 and 5, characterized in that: The stator contact (4) includes an integrally formed intermediate main contact portion (41) and contact foot portion (42). The contact foot portion (42) is disposed at both ends of the intermediate main contact portion (41), and a positioning protrusion (43) is provided on the outer side of the intermediate main contact portion (41).

7. The through-hole conductive slip ring with adjustable contact pressure according to claim 6, characterized in that: The intermediate main contact part (41) includes a figure-eight rod, the upper end of which is connected by a crossbar, the contact foot (42) is located at the lower end of the figure-eight rod, and the positioning protrusion (43) is located at the center of the outer side of the crossbar; the pressure regulating column (7) is provided with a row of positioning holes (702), and the contact foot (42) is inserted into the positioning hole (702).

8. The through-hole conductive slip ring with adjustable contact pressure according to claim 7, characterized in that: The inner wall of the housing (31) is symmetrically provided with key posts (301), and both the upper and lower ends of the key posts (301) are provided with threaded holes (302). The end cap (8) is connected to the housing (31) by end cap screws (12) that match the threaded holes (302).

9. The through-hole conductive slip ring with adjustable contact pressure according to any one of claims 1 to 3, 7 and 8, characterized in that: The outer wall of the rotor (1) is provided with several concentric positioning ring grooves (103), and a wire hole (102) is provided in the concentric positioning ring groove. The rotor contact (5) is set in the corresponding concentric positioning ring groove (103), and an insulating retaining ring (6) is provided between two adjacent rotor contact (5).

10. The through-hole conductive slip ring with adjustable contact pressure according to claim 9, characterized in that: The rotor (1) has several fixing holes (101) along the circumferential direction on the upper part, and locking screws (14) are threaded into the fixing holes (101).

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