A composite sensing and transmission device integrating a rotary transformer and a slip ring

Abstract

The utility model provides a kind of integrated rotary transformer and composite sensing and transmission device of slip ring, including slip ring, rotary transformer and press plate, the press plate is fixedly arranged in the left side of the slip ring;Slip ring includes shell, shaft subassembly, brush subassembly, first bearing and second bearing, the first bearing is located in the middle part of shaft subassembly, second bearing is located in the tail of shaft subassembly, the shaft subassembly is supported in shell by first bearing and second bearing;The brush subassembly is located above the shaft subassembly, and is located between first bearing and second bearing, rotary transformer is arranged in the left side of the first bearing;Rotary transformer and the slip ring are encapsulated in the shell and form an inseparable integral functional module.The utility model's integrated rotary transformer and composite sensing and transmission device of slip ring are high in precision, good in rigidity, and it is convenient to install and maintain while significantly reducing cost.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, and in particular to a composite sensing and transmission device integrating a rotary transformer and a slip ring. Background Technology

[0002] A rotary transformer (or resolver) is a high-precision, high-reliability angle sensor widely used in position feedback in servo motors, robotics, aerospace, and other fields. A conductive slip ring, on the other hand, is an electromechanical device used to transmit electrical power and signals between fixed and rotating structures.

[0003] Many high-end rotating equipment require the simultaneous use of resolvers and slip rings. Resolvers provide precise absolute position of the motor or load, enabling closed-loop control. Slip rings provide a continuous power and signal path for sensors, tools, or actuators in the rotating parts.

[0004] Currently, the industry generally adopts a model of purchasing and installing resolvers and slip rings as two independent components separately. This model has many drawbacks: Large space occupation: The two independent components need to be positioned, installed and fixed separately, which increases the installation space and does not conform to the development trend of compact equipment.

[0005] Assembly is complex and accuracy is difficult to guarantee: Resolvers are very sensitive to coaxiality and eccentricity during installation. Separate installation requires high-precision alignment of the slip ring and resolver separately. The assembly process is complex, and accumulated errors can easily lead to a decrease in the measurement accuracy of the resolver.

[0006] Reduced reliability: Numerous external connection cables and connectors increase the number of potential points of failure in the system.

[0007] High cost: Two rounds of procurement and assembly increase material and labor costs. Utility Model Content

[0008] The purpose of this invention is to provide a composite sensing and transmission device that integrates a rotary transformer and a slip ring, combining the rotary transformer and slip ring into a single module to solve the problems of spatial conflict, device complexity, loss of accuracy, low reliability, and high cost caused by discrete structures.

[0009] This utility model provides a composite sensing and transmission device integrating a rotary transformer and a slip ring, comprising: a slip ring, a rotary transformer, and a pressure plate, wherein the pressure plate is fixedly disposed on the left side of the slip ring; The slip ring includes a housing, a shaft assembly, a brush assembly, a first bearing, and a second bearing. The first bearing is located in the middle of the shaft assembly, and the second bearing is located at the tail of the shaft assembly. The shaft assembly is supported in the housing by the first and second bearings. The brush assembly is located above the shaft assembly and between the first and second bearings. The rotary transformer is located to the left of the first bearing. The rotary transformer and the slip ring are encapsulated together within the housing to form an inseparable, integrated functional module.

[0010] Optionally, the slip ring further includes a dust cover, which is installed on the outside of the housing.

[0011] Optionally, the rotating shaft assembly includes a rotating shaft, an upper pressure plate, an insulating washer, a ring plate, and a bearing housing; The upper pressure plate is sleeved on the rotating shaft, and the ring is sleeved on the insulating washer, thereby placing the insulating washer on the rotating shaft; the bearing seat is fixed on the rotating shaft and is located close to the second bearing.

[0012] Optionally, the rotary transformer includes a resolver stator fixed inside a housing and a resolver rotor fixed to a shaft assembly, wherein the resolver rotor is coaxial with the shaft assembly and fixed to the shaft.

[0013] Optionally, the resolver rotor is fixed to the shaft of the shaft assembly and axially limited by a retaining ring. Optionally, the resolver stator is fixed inside the housing by the pressure plate.

[0014] Optionally, a bearing retaining ring is provided at the second bearing to limit the position of the rotating shaft assembly. The integrated rotary transformer and slip ring composite sensing and transmission device provided by this utility model has the following beneficial effects: Compact structure and space saving: The integrated design significantly reduces axial and radial installation space, making the equipment structure more compact.

[0015] High precision and good rigidity: Precise centering and calibration have been completed before leaving the factory, avoiding on-site installation errors, ensuring the best measurement accuracy of the resolver, and providing better overall mechanical rigidity.

[0016] High reliability: The number of external connection cables and connectors is reduced, the failure rate is lowered, and the overall reliability of the system is improved.

[0017] Easy to install and maintain: Users only need to align and fix it as if it were a single component, which greatly simplifies the assembly process and reduces maintenance costs.

[0018] High cost-effectiveness: The overall cost of ownership is significantly reduced by saving on installation costs, space costs, and maintenance costs.

[0019] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the overall assembly structure of the composite sensing and transmission device integrating a rotary transformer and a slip ring according to an embodiment of this utility model. Figure 2 This is a side view schematic diagram of the composite sensing and transmission device integrating a rotary transformer and a slip ring according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the slip ring according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a rotary transformer according to an embodiment of the present invention; Figure 5 This is a side view schematic diagram of a rotary transformer according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the rotating shaft assembly according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the fixing of the resolver rotor and shaft assembly according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the rotor and stator conductors according to an embodiment of the present invention; Figure 9 yes Figure 8 The side view diagram shown; Among them, 1-slip ring, 2-rotor transformer, 3-retaining ring, 4-pressure plate, 5-shaft assembly, 6-housing, 7-brush assembly, 8-dust cover, 9-first bearing, 10-second bearing, 11-bearing retaining ring, 12-rotor transformer, 13-stator transformer, 14-shaft, 15-upper pressure plate, 16-insulating washer, 17-ring plate, 18-bearing seat, 19-stator wire, 20-slip ring rotor wire, 21-slip ring stator wire, 22-rotor transformer stator wire. Detailed Implementation

[0021] The embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only for explaining the present invention and are not restrictive.

[0022] This utility model embodiment provides a composite sensing and transmission device integrating a rotary transformer and a slip ring, such as... Figure 1 As shown, the integrated rotary transformer and slip ring composite sensing and transmission device of this embodiment includes: a slip ring 1, a rotary transformer 2, and a pressure plate 4. The pressure plate 4 is fixedly disposed on the left side of the slip ring 1. The slip ring 1 establishes a reliable electrical signal path between the fixed structure and the rotating structure through a ring brush contact, thereby removing the limitation of rotational motion on energy and data transmission and realizing 360° unrestricted continuous rotation of the device. The rotary transformer 2 provides reliable, stable, and accurate angular displacement and angular velocity feedback for the rotating system, and the pressure plate 4 is used to fix the rotary transformer stator 13 inside the housing 6.

[0023] like Figure 3 As shown, the slip ring 1 in this embodiment includes a housing 6, a rotating shaft assembly 5, a brush assembly 7, a first bearing 9, and a second bearing 10. The first bearing 9 is located in the middle of the rotating shaft assembly 5, and the second bearing 10 is located at the tail of the rotating shaft assembly 5. The rotating shaft assembly 5 is supported in the housing 6 by the first bearing 9 and the second bearing 10. The brush assembly 7 is located above the rotating shaft assembly 5 and between the first bearing 9 and the second bearing 10. The rotary transformer 2 is located to the left of the first bearing 9. The rotary transformer 2 and the slip ring 1 are encapsulated together within the housing 6, forming an inseparable, integrated functional module. (See also...) Figure 3 The slip ring 1 may also include a dust cover 8, which is installed on the outside of the housing 6 to achieve overall dust protection for the device. A bearing retainer 11 is provided at the second bearing 10 to limit the rotation shaft assembly 5.

[0024] like Figure 6 As shown, the rotating shaft assembly 5 includes a rotating shaft 14, an upper pressure plate 15, an insulating washer 16, an annular plate 17, and a bearing housing 18. The upper pressure plate 15 is fitted onto the rotating shaft 14 to prevent short circuits to the housing and provides electrical isolation. The annular plate 17 provides a continuous rotating electrical contact channel and is fitted onto the insulating washer 16, which in turn fits onto the rotating shaft 14. The rotating shaft 14 supports all internal rotating components, transmits torque, and defines the rotation center. The insulating washer 16 prevents short circuits between the rings and provides electrical isolation. The bearing housing 18 is fixed to the rotating shaft 14 and located near the second bearing 10, serving to fix and support the bearing.

[0025] like Figure 4 As shown, the resolver 2 includes a resolver stator 13 fixed within the housing 6 and a resolver rotor 12 fixed to the shaft assembly 5. Figure 7As shown, the resolver rotor 12 is fixed to the shaft 14 of the shaft assembly 5, and axially limited by the retaining ring 3. That is, the upper pressure plate 15 is fitted onto the shaft 14, the ring plate 17 is fitted onto the insulating washer 16, and then the insulating washer 16 is fitted onto the shaft 14. The bearing seat 18 is fixed to the shaft 14 by screws. The resolver rotor 12 is coaxial with the shaft assembly 5 and fixed to the shaft 14. The resolver rotor 12 is fixed to the shaft 14 of the shaft assembly 5, and axially limited by the retaining ring 3. The resolver stator 13 is fixed in the housing 6 by the pressure plate 4. In this embodiment, the stator conductor 19 includes a slip ring stator conductor 21 and a resolver stator conductor 22. The slip ring stator conductor 21 is used to connect to the control system interface and transmit the electrical signal received at the slip ring rotor end to the control system; the resolver stator conductor 22 is used to output position sensing signals and directly transmit the mechanical position information detected by the resolver to the control system in the form of electrical signals. The device also includes a slip ring rotor wire 20, which is used to connect to the equipment rotor end signal wire to output the equipment rotor end signal to the slip ring stator, or to give the control system feedback signal to the rotor end through the slip ring.

[0026] The fixed resolver rotor 12 and shaft assembly 5 are arranged according to... Figure 1 The components are installed inside the housing 6 and secured therein by the first bearing 9 and the second bearing 10, with axial positioning achieved using bearing retainers. The brush assembly 7 is fixed to the housing 6 with screws, and the brush assembly 7 and the shaft assembly 5 are elastically connected and electrically conductive. The resolver stator 13 is fixed inside the housing 6 by the pressure plate 4, which is secured to the housing 6 with screws, completing the precise alignment and calibration of the resolver. Then, the resolver stator wire 22 and the slip ring stator wire 21 extend together from the outlet outside the housing 6 (e.g., ...). Figure 9 The dust cover 8 is fixed to the housing 6 with screws, thus forming a composite sensing and transmission device integrating a rotary transformer and a slip ring.

[0027] The principle of the integrated rotary transformer and slip ring composite sensing and transmission device provided in this embodiment is as follows: Through a precise coaxial mechanical structure design (the rotary rotor 12 and the shaft assembly 5 share the same shaft, and the rotary stator 13 and the brush assembly 7 are fixed in the same housing to form an integrated module), the rotary transformer 2 used for high-precision angle measurement and the slip ring 1 used for continuous energy and data transmission are integrated into a unified housing 6, thereby realizing complex, compact and high dynamic performance closed-loop servo control.

[0028] The rotor output torque of the equipment is transmitted to the shaft shared by the shaft assembly 5 and the resolver rotor 12 via couplings or splines. The shaft overcomes static friction and accelerates from a standstill, driving all the ring plates 17 and the resolver rotor 12 to rotate synchronously. Stable rotation is maintained by bearings. The stationary brush assembly 7 maintains constant sliding contact with the rotating ring plate 17 surface to transmit electrical power and signals. The windings on the resolver stator 13 receive high-frequency sinusoidal AC current from the system and are coupled to the resolver rotor 12 via electromagnetic induction. As the resolver rotor 12 rotates, the magnetic reluctance of its internal magnetic circuit changes, causing the voltage amplitude induced in the other two secondary windings on the resolver stator 13, which are spatially 90° out of phase, to follow the sine and cosine functions of the rotor angle. The sinusoidal and cosine analog signals generated by the resolver are transmitted back to the servo drive or controller via the resolver stator wires. A dedicated tracking loop algorithm is used to calculate the absolute angle and rotational speed of the shaft in real time. The controller compares the calculated actual position and speed with the target position and speed commanded by the system. Based on the deviation, the controller sends a new drive current or control signal to the actuator of the rotating part through the slip ring to perform precise torque, speed or position correction.

[0029] Currently, this device has been applied to robot joints, optoelectronic pods, precision turntables, oilfield equipment, and more. Wherever there is a need for continuous, infinite rotation combined with simultaneous sensing, control, energy, and signal transmission, this integrated device truly shines.

[0030] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A composite sensing and transmission device integrating a rotary transformer and a slip ring, characterized in that, include: The slip ring (1), the rotary transformer (2), and the pressure plate (4) are fixedly disposed on the left side of the slip ring (1); The slip ring (1) includes a housing (6), a shaft assembly (5), a brush assembly (7), a first bearing (9), and a second bearing (10). The first bearing (9) is located in the middle of the shaft assembly (5), and the second bearing (10) is located at the tail of the shaft assembly (5). The shaft assembly (5) is supported in the housing (6) by the first bearing (9) and the second bearing (10). The brush assembly (7) is located above the shaft assembly (5) and between the first bearing (9) and the second bearing (10). The rotary transformer (2) is located to the left of the first bearing (9). The rotary transformer (2) and the slip ring (1) are encapsulated together in the housing (6) to form an inseparable integrated functional module.

2. The integrated rotary transformer and slip ring composite sensing and transmission device according to claim 1, characterized in that, The slip ring (1) also includes a dust cover (8) which is installed on the outside of the housing (6).

3. The composite sensing and transmission device integrating a rotary transformer and a slip ring according to claim 1, characterized in that, The rotating shaft assembly (5) includes a rotating shaft (14), an upper pressure plate (15), an insulating washer (16), a ring plate (17), and a bearing seat (18). The upper pressure plate (15) is sleeved on the rotating shaft (14), and the ring plate (17) is sleeved on the insulating washer (16), thereby sleeved the insulating washer (16) on the rotating shaft (14); the bearing seat (18) is fixed on the rotating shaft (14) and is located close to the second bearing (10).

4. The integrated rotary transformer and slip ring composite sensing and transmission device according to claim 3, characterized in that, The rotary transformer (2) includes a rotary stator (13) fixed in the housing (6) and a rotary rotor (12) fixed in the shaft assembly (5). The rotary rotor (12) is coaxial with the shaft assembly (5) and fixed to the shaft (14).

5. The integrated rotary transformer and slip ring composite sensing and transmission device according to claim 4, characterized in that, The resolver rotor (12) is fixed on the shaft (14) of the shaft assembly (5) and is axially limited by the retaining ring (3).

6. The composite sensing and transmission device integrating a rotary transformer and a slip ring according to claim 4, characterized in that, The resolver stator (13) is fixed inside the housing (6) by the pressure plate (4).

7. The integrated rotary transformer and slip ring composite sensing and transmission device according to any one of claims 1 to 6, characterized in that, A bearing retainer (11) is provided at the second bearing (10) to limit the rotation shaft assembly (5).

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