A durable conductive slip ring

Abstract

This utility model relates to the field of conductive slip ring technology and discloses a durable conductive slip ring, including a slip ring housing. A slip ring end cap is fixedly installed on the left surface of the slip ring housing. The slip ring housing is provided with a sealing mechanism, which includes a slip ring rotor, a brush, a slip ring stator, a pressure sensor, a wireless transmission module, an intake valve, a double-lip skeleton oil seal, a main lip, a secondary lip, a sealed oil reservoir, an oil injection pipe, an oil injection nozzle, a rubber sealing ring, and a protrusion. The slip ring rotor is disposed in the inner wall of the slip ring housing, and the brush is fixedly installed on the outer surface of the slip ring rotor. In this durable conductive slip ring, the main lip and secondary lip of the double-lip skeleton oil seal form a double seal, which, together with the lubrication of the sealed oil reservoir, reduces the wear between the slip ring rotor and the oil seal. The oil injection pipe and oil injection nozzle can replenish oil in time to maintain the effect. The rubber sealing ring and the protrusion enhance the sealing performance of the housing connection and prevent impurities from entering.

Description

Technical Field

[0001] This utility model relates to the field of conductive slip ring technology, specifically a durable conductive slip ring. Background Technology

[0002] In the field of rotary conductive transmission in industrial equipment, conductive slip rings are key components, and their long-term stable operation directly affects the working efficiency and service life of the entire equipment. However, existing conductive slip rings face multiple technical bottlenecks in practical applications, making it difficult to meet the industrial demands for high durability and low maintenance costs.

[0003] From the perspective of sealing and lubrication, traditional conductive slip rings mostly adopt a single-lip skeleton oil seal structure, which can only rely on the lubricating grease injected during a single assembly to achieve sealing and lubrication. As the equipment operates for a long time, the continuous friction between the rotor and the oil seal will continuously consume the grease. The single-lip design cannot form an effective oil storage space, resulting in a rapid decline in lubrication effect, which in turn aggravates component wear. At the same time, the traditional structure lacks a convenient oil replenishment channel. Once the grease is exhausted, the equipment must be stopped and disassembled for maintenance, which not only increases downtime but may also cause the sealing performance to further decline due to frequent disassembly and assembly. This allows external dust, moisture and other impurities to easily invade the interior, affecting the stability of conductive contact. In view of this, a durable conductive slip ring is proposed. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a durable conductive slip ring, solving the problem of poor durability of conductive slip rings.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a durable conductive slip ring, comprising a slip ring housing, wherein a slip ring end cap is fixedly installed on the left surface of the slip ring housing; The slip ring housing is equipped with a sealing mechanism, which includes a slip ring rotor, brush, slip ring stator, pressure sensor, wireless transmission module, air intake valve, double-lip skeleton oil seal, main lip, secondary lip, sealing oil reservoir, oil injection pipe, oil injection nozzle, rubber sealing ring, and protrusion.

[0006] Preferably, the slip ring rotor is disposed in the inner wall of the slip ring housing, and the brush is fixedly installed on the outer surface of the slip ring rotor; The slip ring stator is fixedly mounted on the outer surface of the brush.

[0007] Preferably, the pressure sensor is fixedly installed in the inner wall of the slip ring housing, and the wireless transmission module is fixedly installed in the inner wall of the slip ring housing; The intake valve is fixedly installed on the right surface of the slip ring housing.

[0008] Preferably, the double-lip skeleton oil seal is disposed on the outer surface of the slip ring rotor; The main lip is located within the inner wall of the double-lip skeleton oil seal, and the secondary lip is also located within the inner wall of the double-lip skeleton oil seal.

[0009] Preferably, the sealed oil storage tank is located within the inner wall of the double-lip skeleton oil seal.

[0010] Preferably, the oil injection pipe is fixedly installed on the right surface of the double-lip skeleton oil seal, and the oil injection pipe is connected to the sealed oil storage tank; The oil injection nozzle is fixedly installed on the right surface of the oil injection pipe.

[0011] Preferably, the two rubber sealing rings are fixedly installed on both sides of the slip ring housing; Two protrusions are fixedly installed on both sides of the two rubber sealing rings.

[0012] (III) Beneficial Effects Compared with the prior art, the present invention provides a durable conductive slip ring with the following advantages: 1. This durable conductive slip ring features a double-lip skeleton oil seal with a main lip and a secondary lip forming a double seal. Combined with the lubrication of the sealed oil reservoir, it reduces wear between the slip ring rotor and the oil seal. The oil injection pipe and oil injection nozzle can replenish oil in time to maintain the effect. The rubber sealing ring and protrusions enhance the sealing of the housing connection and prevent impurities from entering.

[0013] 2. This durable conductive slip ring features real-time monitoring by a pressure sensor and air pressure regulation by an intake valve, ensuring a stable internal environment within the slip ring housing and preventing abnormal pressure from affecting components such as the conductive contact between the brush and the slip ring stator. A line transmission module provides remote data monitoring for timely maintenance. Multiple structural elements, such as oil seals and sealing rings, work together to reduce malfunctions and significantly improve the long-term operational capability of the slip ring. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a durable conductive slip ring structure according to the present invention; Figure 2 This is a schematic diagram of the slip ring housing structure of this utility model; Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 This is a schematic diagram of the double-lip skeleton oil seal structure of this utility model; Figure 5 This utility model Figure 4 Enlarged view of the structure at point B in the middle.

[0015] In the diagram: 1. Slip ring housing; 2. Slip ring end cap; 3. Slip ring rotor; 4. Brush; 5. Slip ring stator; 6. Pressure sensor; 7. Wireless transmission module; 8. Intake valve; 9. Double-lip skeleton oil seal; 10. Main lip; 11. Secondary lip; 12. Sealed oil reservoir; 13. Oil injection pipe; 14. Oil injection nozzle; 15. Rubber sealing ring; 16. Protrusion. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-5 This utility model provides a new technical solution: a durable conductive slip ring, which solves the problem of poor durability of conductive slip rings. Slip ring housing 1: As the basic frame of the entire slip ring, it supports and protects the internal components, provides installation space for slip ring rotor 3, brush 4, etc., and maintains the stability of the overall slip ring structure. Slip ring end cap 2: Fixed on the left surface of slip ring housing 1, it cooperates with the housing to form a closed space to prevent dust and impurities from entering the housing, while also enhancing the structural strength of the housing. Slip ring rotor 3: Located on the inner wall of slip ring housing 1, it is one of the key components for slip ring to achieve rotational conductivity. By contacting brush 4, it transmits current or signals from the fixed part to the rotating part. Brush 4: Fixed on the outer surface of slip ring rotor 3 and in contact with slip ring stator 5. Its material has good conductivity and wear resistance to ensure stable transmission of current or signal when the rotor rotates. Slip ring stator 5: Fixed on the outer surface of brush 4, it works with the rotor as a fixed part to form a conductive path and ensure that current or signal can be transmitted continuously and effectively. Pressure sensor 6: Installed on the inner wall of slip ring housing 1, it can monitor the air pressure changes in the housing in real time, and promptly provide pressure information to ensure the normal operation of the slip ring. Wireless transmission module 7: Fixed on the inner wall of slip ring housing 1, it can wirelessly transmit the data collected by components such as pressure sensor 6, so as to facilitate remote monitoring of the working status of slip ring. Intake valve 8: Installed on the right surface of slip ring housing 1, it can control the entry of external gas into the housing and adjust the air pressure inside the housing to adapt to different working environment requirements. Double-lip skeleton oil seal 9: It is set on the outer surface of the slip ring rotor 3 and uses its main lip 10 and secondary lip 11 to achieve double sealing, preventing the leakage of lubricating oil in the housing and the entry of external impurities. Main lip 10: Located on the inner wall of the double lip skeleton oil seal 9, it is the main sealing structure and plays a key role in preventing lubricating oil leakage by making close contact with the rotor. Secondary lip 11: Also located on the inner wall of the double-lip skeleton oil seal 9, serving as an auxiliary sealing structure to further enhance the sealing effect and improve the sealing performance of the slip ring. Sealed oil reservoir 12: Located on the inner wall of the double-lip skeleton oil seal 9, it is used to store lubricating oil, providing lubrication for the contact parts between the oil seal and the rotor, reducing wear, and extending the service life of the oil seal. Oil injection pipe 13: Fixed to the right surface of the double-lip skeleton oil seal 9 and connected to the sealed oil reservoir 12, it is a channel for replenishing lubricating oil to the oil reservoir to ensure sufficient oil in the oil reservoir. Oil nozzle 14: Fixed on the right surface of oil injection pipe 13, it facilitates connection to oil injection equipment and allows lubricating oil to smoothly pass through oil injection pipe 13 into sealed oil storage tank 12. Rubber sealing ring 15: Fixed on both sides of the slip ring housing 1, it uses the elasticity of rubber to tightly fit the relevant components, enhances the sealing of the housing and other connecting parts, and prevents liquid or gas leakage. Protrusion 16: Fixed on both sides of the two rubber sealing rings 15 respectively, which can increase the contact tightness between the sealing ring and the connecting parts, improve the sealing performance, and ensure a more reliable sealing effect.

[0018] When the device is working, the durable conductive slip ring rotor 3 rotates while the slip ring stator 5 remains fixed. The brush 4 rotates with the slip ring rotor 3 and always keeps in contact with the slip ring stator 5, thereby realizing the continuous transmission of electrical energy or signals between the rotating part and the fixed part. During the entire movement, the double-lip skeleton oil seal 9 moves synchronously with the slip ring rotor 3. Its main lip 10 and secondary lip 11 are always tightly fitted to ensure sealing performance. The pressure sensor 6 continuously monitors the internal pressure. If the pressure is abnormal, the normal pressure can be maintained by adjusting the air intake valve 8. When the lubricating oil in the sealed oil reservoir 12 is insufficient, lubricating oil can be added through the oil injection nozzle 14 and the oil injection pipe 13 to ensure the good operating condition of the device. Example 1: Double-lip skeleton oil seal for rotary joint (with built-in conductive slip ring) of assembly robot Reference manual attached Figure 5Assembly robots operate in electronic component assembly workshops. The conductive slip rings built into their rotary joints need to ensure stable signal transmission (contact resistance fluctuation <2mΩ). They employ a double-lip nitrile rubber structure with a 1.0mm thick cold-rolled steel plate frame. The main lip fits the joint shaft surface (surface roughness Ra0.8μm), with a designed lip interference of 0.2mm to prevent internal lubricant (viscosity 320cSt) from seeping into the copper ring gap of the conductive slip ring. The secondary lip maintains a 0.05mm micro-gap with the shaft surface, forming a dust barrier with the inner flocked layer. During production, precision molding ensures the concentricity error of the double lips is <0.03mm. After 100,000 forward and reverse rotation tests (120r / min), the insulation resistance of the conductive slip ring remains at 10¹. 0 With an Ω or higher rating, the failure rate is reduced by 60% compared to the single-lip oil seal solution, effectively avoiding signal jumps caused by grease contamination.

[0019] Example 2: Double-lip skeleton oil seal for the elbow joint (with high-voltage conductive slip ring) of an explosion-proof robot Reference manual attached Figure 5 The explosion-proof robot operating in the chemical workshop needs to transmit 380V power (rated current 10A) through the conductive slip ring of its elbow joint. The oil seal is required to be resistant to chemical corrosion. It adopts a fluororubber double lip + 1.5mm thick 316 stainless steel skeleton, and the main lip is embedded with a polytetrafluoroethylene guide ring (hardness Shore D60) to reduce the frictional temperature rise with the hard chrome-plated shaft (≤40℃). A pressure relief groove is opened between the double lips to prevent the joint cavity from being damaged by air pressure impact due to temperature changes. A secondary vulcanization process (200℃×3 hours) is used during production to make the peel strength between rubber and skeleton >8N / cm. After the finished product has been running continuously for 500 hours in an environment containing 5% chlorine, the contact pressure drop of the conductive slip ring is still <5mV, which is far better than the national standard requirement of 10mV.

[0020] Example 3: Double-lip skeleton oil seal for wrist joint (integrated signal slip ring) of rescue robot Reference manual attached Figure 5 The rescue robot operates in a rubble environment. The signal slip ring in the wrist joint needs to transmit high-definition image signals (10Gbps bandwidth) and must be protected against mud and sand intrusion. It adopts a double-lip design of hydrogenated nitrile rubber and a 1.2mm thick galvanized steel plate frame. The main lip adopts a stepped cross-section design, and the first seal is formed by a pre-compression of 0.3mm. The secondary lip is designed with comb-like edges to enhance the interception of particles with a diameter >10μm. Solid lubricant is injected between the double lips during production. After 500 mud immersion tests, the bit error rate of the signal slip ring is still <10⁻. 9 This improves upon the design without a secondary lip structure by two orders of magnitude, ensuring uninterrupted image transmission at the rescue site.

[0021] Example 4: Nitrogen sealing of the elbow joint (with high-voltage conductive slip ring) of an explosion-proof robot Refer to the attached diagram in the instruction manual. Figure 3 A precision conductive slip ring with a diameter of 30mm and a length of 50mm was selected, featuring 12 signal channels and 4 power channels to meet the signal and power transmission requirements of the robot joint. To achieve a tight seal, two sealing lips made of wear-resistant fluororubber were installed between the slip ring's outer shell and the rotating shaft, ensuring a tight seal during rotation. A nitrogen injection port and a pressure monitoring port were provided on the slip ring's outer shell. The injection port, connected to a nitrogen source, allows nitrogen to be injected into the slip ring's internal cavity, maintaining a positive pressure and preventing external contaminants from entering. A miniaturized diffused silicon pressure sensor was selected, with a measurement range of 0-100kPa, an accuracy of ±0.5%FS, and an output signal of 4-20mA. This small sensor is suitable for installation in the confined space of the robot joint. The pressure sensor is threadedly connected to the slip ring's pressure monitoring port for real-time monitoring of the nitrogen pressure inside the slip ring. When the internal pressure falls below a set threshold, the sensor promptly sends a signal to remind the user to replenish nitrogen.

[0022] 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 durable electrically conductive slip ring comprising a slip ring housing (1), characterized in that: The slip ring housing (1) is fixedly mounted with a slip ring end cap (2) on its left surface. The slip ring housing (1) is provided with a sealing mechanism, which includes a slip ring rotor (3), a brush (4), a slip ring stator (5), a pressure sensor (6), a wireless transmission module (7), an air intake valve (8), a double-lip skeleton oil seal (9), a main lip (10), a secondary lip (11), a sealed oil reservoir (12), an oil injection pipe (13), an oil injection nozzle (14), a rubber sealing ring (15), and a protrusion (16).

2. The durable conductive slip ring according to claim 1, characterized in that: The slip ring rotor (3) is disposed in the inner wall of the slip ring housing (1), and the brush (4) is fixedly installed on the outer surface of the slip ring rotor (3); Among them, the slip ring stator (5) is fixedly installed on the outer surface of the brush (4).

3. The durable conductive slip ring according to claim 1, characterized in that: The pressure sensor (6) is fixedly installed in the inner wall of the slip ring housing (1), and the wireless transmission module (7) is fixedly installed in the inner wall of the slip ring housing (1); The intake valve (8) is fixedly installed on the right surface of the slip ring housing (1).

4. A durable conductive slip ring according to claim 1, characterized in that: The double-lip skeleton oil seal (9) is disposed on the outer surface of the slip ring rotor (3); The main lip (10) is located in the inner wall of the double-lip skeleton oil seal (9), and the secondary lip (11) is located in the inner wall of the double-lip skeleton oil seal (9).

5. A durable conductive slip ring according to claim 1, characterized in that: The sealed oil storage tank (12) is located in the inner wall of the double-lip skeleton oil seal (9).

6. A durable conductive slip ring according to claim 1, characterized in that: The oil injection pipe (13) is fixedly installed on the right surface of the double-lip skeleton oil seal (9), and the oil injection pipe (13) is connected to the sealed oil storage tank (12); The oil injection nozzle (14) is fixedly installed on the right surface of the oil injection pipe (13).

7. A durable conductive slip ring according to claim 1, characterized in that: The two rubber sealing rings (15) are fixedly installed on both sides of the slip ring housing (1); Two protrusions (16) are fixedly installed on both sides of two rubber sealing rings (15).

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