Double-path rotary joint transmission structure for millimeter wave antenna

Abstract

The application discloses a kind of double-path rotary joint transmission structures for millimeter wave antenna, it is related to double-path rotary joint transmission technical field, including heart group and CH1 coaxial module, the outer surface of the center group is equipped with CH1 coaxial module, and CH1 coaxial module includes the stator base matrix of being arranged in the position of center group outer surface, the top of the stator base matrix is equipped with installation step seat, and the inner surface of stator base matrix is equipped with module containing cavity, the side of module containing cavity is equipped with upper and lower oil passage sealing ring groove, and the inside of module containing cavity, it is equipped with first rotation fluid coupling channel, center group is as the core load matrix of double-path rotary joint, provides accurate assembly datum and overall support for CH1 coaxial module, guarantees the coaxial precision of double-path signal transmission, the application is reasonably designed, and effectively solves double-channel independent multi-band operation and low maintenance through independent rotation of each other, and the diversification of transmission signal can be realized under the condition of relative restriction.

Description

Technical Field

[0001] This invention relates to the field of dual-path rotary joint transmission technology, specifically a dual-path rotary joint transmission structure for millimeter-wave antennas. Background Technology

[0002] Dual-channel rotary joint transmission technology is a dual-channel radio frequency synchronous transmission technology for millimeter-wave antennas. Currently, dual-channel radio frequency rotary joints on the market have two ports arranged side by side. The two channels can only rotate at the same time and cannot be used independently. When the equipment needs two different frequency bands (dual antennas) to rotate at the same time or only needs to run a single frequency band antenna, conventional dual-channel radio frequency joints cannot achieve this. Moreover, when the communication of one port fails, it cannot be repaired independently or replaced quickly.

[0003] With the rapid development of current market applications (radar, turntable, robot, etc.), existing conventional dual-channel RF rotary joints can no longer meet the diverse needs of modern applications such as dual-band radar antennas. Therefore, we propose a dual-channel rotary joint transmission structure for millimeter-wave antennas. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a dual-path rotary joint transmission structure for millimeter-wave antennas, solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dual-path rotary joint transmission structure for millimeter-wave antennas, comprising a central group and a CH1 coaxial module. The CH1 coaxial module is disposed on the outer surface of the central group, and the CH1 coaxial module includes a stator base body disposed on the outer surface of the central group. The top of the stator base body is provided with a mounting step seat, and the inner surface of the stator base body is provided with a module receiving cavity. One side of the module receiving cavity is provided with an upper and lower oil passage sealing ring groove, and the interior of the module receiving cavity is provided with a first fluid coupling channel.

[0006] Furthermore, a bearing pressure plate is provided on the outer surface of the central assembly, and a top positioning bearing is provided at the bottom of the bearing pressure plate.

[0007] Furthermore, the bottom of the top positioning bearing is provided with a CH1 rotor flange, and the CH1 rotor flange is sleeved on the outer surface of the center group, and the upper part of the top positioning bearing supports the bearing pressure plate, which is sandwiched between the bearing pressure plate and the CH1 rotor flange.

[0008] Furthermore, the bottom of the stator base is provided with a housing, a bearing pressure plate and a top positioning bearing are concentrically assembled with the housing, locking the CH1 coaxial module and the CH1 rotor flange.

[0009] Furthermore, the lower half of the central assembly is equipped with a bottom positioning bearing, and the bottom positioning bearing and the top positioning bearing are symmetrically distributed on the outer surface of the central assembly.

[0010] Furthermore, a CH1 connecting seat is provided at the bottom of the outer surface of the central assembly, located on the inner surface of the outer shell, and a CH1 shift fork plate is provided at the bottom of the CH1 connecting seat, and the CH1 shift fork plate rotates with the main shaft of the central assembly.

[0011] Furthermore, a stator flange is provided at the bottom of the CH1 connector, and the stator flange is fixed to the CH1 connector by screws.

[0012] Furthermore, the inner surface of the stator flange is provided with a CH1 coaxial joint at the corresponding position of the CH1 shift fork plate, and the outer surface of the CH1 connector is provided with a single-path rotary connection mechanism.

[0013] Furthermore, the single-path rotary connection mechanism includes an upper coaxial docking boss channel located at the top of the CH1 connector seat, and a sealing pressure-bearing layer is provided at the bottom of the upper coaxial docking boss channel. A mounting plate is fixedly connected to the bottom of the sealing pressure-bearing layer, and a fixing through hole is opened on the inner surface of the mounting plate. A limiting hexagonal positioning platform is provided at the bottom of the mounting plate.

[0014] Beneficial effects: Compared with the prior art, the technical solution provided by this invention has the following advantages: This invention utilizes the CH1 coaxial module 5 to form an integrated linkage support system. The stator base is precisely positioned by mounting a stepped seat, forming a bidirectional coaxial constraint with two symmetrically arranged bearings. This significantly reduces vibration and deformation caused by high-speed rotation, preventing coaxiality drift during long-term operation. The module's cavity employs an integrated partition structure, completely and independently dividing the first fluid coupling channel and forming a physical isolation layer with the outer CH2 transmission path. Even if both channels rotate at high speed simultaneously, millimeter-wave electromagnetic waves will not couple and interfere with each other, eliminating the need for additional shielding and simplifying the overall structure. The upper and lower oil passage sealing ring grooves are arranged around the cavity, uniformly retaining lubricating medium during rotation, continuously reducing relative rotational friction of the coupling channels. Simultaneously, multi-layer sealing prevents grease leakage and contamination of the external transmission fork assembly. The entire module is precisely matched with the central shaft cavity, unifying the rotation reference of the entire set of joints. It can adapt to single-channel and dual-channel operating modes, stably controlling signal standing wave loss under continuous reciprocating antenna rotation, extending the service life of RF coupling components, and reducing the frequency of regular equipment maintenance. This invention utilizes a single-channel rotating connection mechanism 12 to create a continuous and smooth radio frequency transmission path, reducing energy loss caused by signal refraction and reflection. The sealed pressure-bearing layer absorbs axial impact vibrations generated by high-speed reciprocating rotation. The mounting plate evenly distributes locking stress through multiple sets of fixed through holes, continuously maintaining the coaxial accuracy of the CH2 path. The mechanism adapts to various antenna operating modes; when a single channel operates independently, it does not affect the radio frequency performance of the other channel. Under long-term rotating conditions, it can stably control the standing wave ratio, reduce wear on radio frequency coupling components, lower the probability of overall system failure and downtime, and improve the reliability of millimeter-wave antennas for continuous all-weather operation. This invention achieves independent linkage between two channels through the configuration of the CH1 coaxial module 5 and the single-channel rotary connection mechanism 12. The two channels are arranged in separate zones without interfering with each other, and share a common bearing centering reference to ensure synchronous rotation accuracy. The CH1 module has a built-in independent coupling channel, and the single-channel rotary connection mechanism is responsible for CH2 radio frequency transmission. The two structures carry two signals respectively, and the rotation can be operated synchronously or independently. The two work together to form a double-layer shielding isolation, which reduces the cross coupling of the two millimeter-wave signals. At the same time, their respective sealing structures work together to block dust and oil, buffer rotational vibration, stabilize standing wave index, meet the flexible switching requirements of dual-channel transmission, and extend the service life of radio frequency components. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall invention.

[0016] Figure 2 This is an exploded view of the present invention.

[0017] Figure 3 This is an overall diagram of the CH1 module of the present invention.

[0018] Figure 4 This is an exploded view of the CH1 module of the present invention.

[0019] Figure 5 This is a schematic diagram of the coupling of the CH1 module of the present invention.

[0020] Figure 6 This is an overall view of the CH2 single-path rotary joint of the present invention.

[0021] Figure label: 1. Central assembly; 2. Bearing pressure plate; 3. Top positioning bearing; 4. CH1 rotor flange; 5. CH1 coaxial module; 501. Stator base body; 502. Mounting step seat; 503. Module receiving cavity; 504. Upper and lower oil passage sealing ring grooves; 505. First rotation fluid coupling channel; 6. Housing; 7. Bottom positioning bearing; 8. CH2 connecting seat; 9. CH2 shift fork plate; 10. Stator flange; 11. CH2 coaxial joint; 12. Single-path rotary connection mechanism; 1201. Upper coaxial docking boss channel; 1202. Sealing pressure bearing layer; 1203. Mounting plate; 1204. Fixing through hole; 1205. Limiting hexagonal positioning platform. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] A dual-path rotary joint transmission structure for millimeter-wave antennas includes a central group 1 and a CH1 coaxial module 5. The CH1 coaxial module 5 is disposed on the outer surface of the central group 1, and the CH1 coaxial module 5 includes a stator base 501 disposed on the outer surface of the central group 1. A mounting step seat 502 is provided on the top of the stator base 501, and a module receiving cavity 503 is formed on the inner surface of the stator base 501. An upper and lower oil passage sealing ring groove 504 is formed on one side of the module receiving cavity 503, and a first fluid coupling channel 505 is provided inside the module receiving cavity 503. The central group 1, as the core bearing base of the dual-path rotary joint, provides a precise assembly reference and overall support for the CH1 coaxial module 5, ensuring the coaxial accuracy of dual-path signal transmission. In the CH1 coaxial module 5, the stator base 501 is the bearing base. The base, relying on the top-mounted stepped seat 502, achieves a positioning and fitting assembly, effectively limiting radial and axial offset, ensuring the coaxiality and structural stability of the CH1 coaxial module 5 assembly. The module receiving cavity 503 opened inside the base provides an independent installation space for the coupling transmission structure, realizing the cavity partitioning and isolation layout. The upper and lower oil passage sealing ring grooves 504 can cooperate with the sealing element to form a sealed protective structure, isolating external dust, oil and water vapor, protecting the transmission channel inside the cavity. The built-in first fluid coupling channel 505 relies on the independent shaft cavity layout of the central group 1, and cooperates with subsequent components to achieve dual-channel physical isolation, avoiding signal crosstalk problems. All components work together to achieve synchronous and stable transmission of dual signals through high-precision coaxial positioning, independent cavity partitioning, and sealed protection structure, greatly improving the signal integrity and structural reliability during the rotation transmission process of the millimeter wave antenna.

[0024] The central assembly 1 has a bearing pressure plate 2 on its outer surface, a top positioning bearing 3 at its bottom, and a CH1 rotor flange 4 at its bottom. The CH1 rotor flange 4 is fitted onto the outer surface of the central assembly 1, and the top positioning bearing 3 supports the bearing pressure plate 2, sandwiched between the bearing pressure plate 2 and the CH1 rotor flange 4. The central assembly 1 serves as the central reference carrier of the overall rotary transmission structure, bearing radial load and coaxial positioning, ensuring the axial accuracy of dual-channel signal transmission. The bearing pressure plate 2 is installed on the top of the structure, acting as an axial clamping and limiting component, applying a uniform preload to the top positioning bearing 3 to limit the top... The axial movement and vertical clearance offset of the positioning bearing 3 are mitigated. The top positioning bearing 3 is clamped between the bearing pressure plate 2 and the CH1 rotor flange 4. The upper part is supported by the bearing pressure plate 2 for clamping and limiting, and the lower part supports the rotational movement of the CH1 rotor flange 4. This effectively reduces radial runout and frictional resistance during rotation. The CH1 rotor flange 4 is movably sleeved on the outside of the center group 1. Relying on the centering support of the top positioning bearing 3, it achieves stable coaxial rotation around the central axis. All components cooperate with each other and limit each other at each layer to strictly lock the overall rotational concentricity, eliminate rotational eccentricity, loosening and jamming problems, ensure stable millimeter wave signal rotational transmission without offset loss, and meet the requirements of high-precision rotational conditions.

[0025] The stator base 501 has a housing 6 at its bottom. A bearing pressure plate 2 and a top positioning bearing 3 are concentrically assembled with the housing 6, locking the CH1 coaxial module 5 and the CH1 rotor flange 4. The lower half of the center group 1 has a bottom positioning bearing 7, which is symmetrically distributed with the top positioning bearing 3 on the outer surface of the center group 1. A CH2 connecting seat 8 is located at the bottom of the outer surface of the center group 1, on the inner surface of the housing 6. A CH2 shift fork plate 9 is located at the bottom of the CH2 connecting seat 8, rotating with the main shaft of the center group 1 to actuate the bottom CH2 rotating joint and transmit rotational power. The center group 1 serves as the axial reference for the entire rotating structure, providing a coaxial assembly carrier for the CH2 connecting seat 8 and ensuring the rotational transmission is synchronized. With high precision, the outer shell 6 encloses the external components, serving as a protective limiter. The CH2 connecting seat 8 is securely mounted at the bottom of the central group 1 and rotates synchronously with the main shaft. As an intermediate base for transmission, it bears the torque of the main shaft and stably supports the CH2 shift fork plate 9, preventing radial wobbling when the shift fork rotates. The CH2 shift fork plate 9 can rotate synchronously with the main shaft of the central group 1. Relying on the plate surface locking structure, it continuously abuts against the CH2 coaxial joint 11, synchronously transmitting the rotational power of the main shaft to the lower joint assembly. The three are coaxially linked, and the transmission eccentricity is eliminated by relying on the unified rotation reference of the central group 1. The rigid movement of the CH2 shift fork plate 9 realizes synchronous power output, avoiding the millimeter-wave signal loss and phase shift problems caused by the asynchronous rotation of the two signals, and ensuring the synchronous and stable rotational transmission of the two millimeter-wave signals.

[0026] The CH2 connector 8 has a stator flange 10 at its bottom, which is fixed to the CH2 connector 8 with screws. The inner surface of the stator flange 10 is provided with a CH2 coaxial joint 11 at the corresponding position of the CH2 shift fork plate 9. The outer surface of the CH2 connector 8 is provided with a single-path rotary connection mechanism 12. The CH2 connector 8, as a transmission base that rotates synchronously with the main shaft, is rigidly locked to the stator flange 10 with screws. The two fit tightly without assembly gaps, ensuring no relative slippage during rotation and a unified transmission reference. The stator flange 10 provides a fixed mounting carrier for the CH2 coaxial joint 11. The CH2 shift fork plate 9 rotates synchronously with the main shaft of the center group 1 and is inserted into the positioning structure of the CH2 coaxial joint 11, driving the CH2 coaxial joint 11 to rotate synchronously. This realizes the rotation linkage of the CH2 RF path, stabilizes the rotational transmission performance of the millimeter-wave signal, and facilitates later maintenance and replacement through modular assembly.

[0027] The single-channel rotary connection mechanism 12 includes an upper coaxial docking boss channel 1201 located at the top of the CH2 connector 8. A sealing pressure-bearing layer 1202 is provided at the bottom of the upper coaxial docking boss channel 1201. A mounting plate 1203 is fixedly connected to the bottom of the sealing pressure-bearing layer 1202. A fixing through hole 1204 is provided on the inner surface of the mounting plate 1203. A limiting hexagonal positioning platform 1205 is provided at the bottom of the mounting plate 1203. The single-channel rotary connection mechanism 12 performs the coaxial docking and sealing positioning functions of the CH2 RF path. The upper coaxial docking boss channel 1201 serves as the signal docking medium, ensuring precise coaxial matching with the upper CH2 connector 8 and reducing millimeter-wave transmission loss. The sealing pressure-bearing layer 1202 is sandwiched between the docking channel and the mounting plate 1203. Between 203, the pressure-bearing buffer isolates moisture and dust, protecting the internal coupling structure. The mounting plate 1203 is secured by the fixed through hole 1204. The bottom limiting hexagonal positioning platform 1205 restricts the circumferential displacement of the assembly and locks the coaxial reference. The CH1 rotor flange 4 and stator flange 10 achieve smooth forward and reverse rotation by the top positioning bearing 3 and the bottom positioning bearing 7. The two use non-contact coupling to transmit radio frequency signals, with no mechanical friction loss. The entire mechanism is independent of the first rotation fluid coupling channel 505. Relying on the coaxial positioning and sealing protection structure, it can support the synchronous rotation of the first rotation fluid coupling channel 505 and CH2 connecting seat 8, or it can operate independently. The two signals do not interfere with each other, greatly improving the flexibility and signal transmission stability of dual-channel millimeter wave rotation transmission.

[0028] First, after the antenna issues a rotation command, the central group 1 rotates synchronously as the main shaft. The top bearing pressure plate 2 continuously applies a uniform axial preload to the top positioning bearing 3. The bottom positioning bearings 7, symmetrically arranged at the bottom, cooperate to share the load. The bidirectional bearings constrain the CH1 rotor flange 4 to prevent radial runout. The CH1 coaxial module 5 operates synchronously. The stator base 501 maintains coaxial positioning by relying on the mounting step seat 502. The first fluid coupling channel 505 in the module housing cavity 503 transmits the CH1 millimeter-wave signal through non-contact coupling. The upper and lower oil circuit sealing rings... The groove 504, in conjunction with the seal, blocks oil and impurities. The outer shell 6 encloses all internal components, isolating them from external environmental interference. The CH2 connecting seat 8 in the lower half of the central assembly 1 rotates synchronously with the spindle, and the upper single-path rotating connecting mechanism 12 works synchronously. The upper coaxial docking boss channel 1201 connects to transmit CH2 radio frequency signals. The sealing pressure-bearing layer 1202 buffers rotational vibration. The mounting plate 1203 is locked and fixed through the fixing through hole 1204. The hexagonal positioning table 1205 limits circumferential slippage. The two channels work independently without crosstalk. Then, the rotation action is performed. The CH2 channel is synchronously driven by a shift fork, enabling dual-channel synchronous millimeter-wave signal transmission. The continuous rotation of the central group 1 drives the CH2 connecting seat 8 to rotate synchronously. The CH2 shift fork plate 9 follows the main shaft in synchronous circumferential motion, continuously engaging and rotating the CH2 coaxial joint 11. The stator flange 10 is firmly fixed to the bottom of the CH2 connecting seat 8 with screws, stably supporting the CH2 coaxial joint 11 and ensuring backlash-free slippage of the shift fork transmission. The top positioning bearing 3 and the bottom positioning bearing 7 symmetrically support the entire main shaft, resulting in extremely low frictional resistance during bidirectional rotation. 1. The rotor flange 4 and stator flange 10 adopt non-contact coupling for radio frequency transmission throughout the entire process, with no mechanical wear and stable signal loss. The CH1 path relies on the first fluid coupling channel 505 to transmit signals independently, while the CH2 path relies on the single-path rotating connection mechanism 12 to transmit signals independently. Depending on the antenna operating conditions, dual-channel synchronous rotation or single-path operation can be selected. The sealing ring groove continuously protects the internal coupling channel to prevent dust and moisture from entering and causing signal attenuation. Finally, after the rotation operation is completed, the equipment stops for self-inspection, and all components are reset to maintain the benchmark, ready for the next operating condition switch.

[0029] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dual-channel rotary joint transmission structure for a millimeter wave antenna, comprising a center group (1) and a CH1 coaxial module (5), characterized in that, The outer surface of the central group (1) is provided with a CH1 coaxial module (5), and the CH1 coaxial module (5) includes a stator base base (501) located on the outer surface of the central group (1). The top of the stator base base (501) is provided with a mounting step seat (502), and the inner surface of the stator base base (501) is provided with a module receiving cavity (503). The side of the module receiving cavity (503) is provided with an upper and lower oil passage sealing ring groove (504), and the inside of the module receiving cavity (503) is provided with a first fluid coupling channel (505).

2. The dual-path revolute joint transmission structure for a millimeter wave antenna according to claim 1, characterized in that: The outer surface of the central assembly (1) is provided with a bearing pressure plate (2), and the bottom of the bearing pressure plate (2) is provided with a top positioning bearing (3).

3. The dual-path revolute joint transmission structure for a millimeter wave antenna according to claim 2, characterized in that: The bottom of the top positioning bearing (3) is provided with a CH1 rotor flange (4), and the CH1 rotor flange (4) is sleeved on the outer surface of the center group (1), and the upper part of the top positioning bearing (3) supports the bearing pressure plate (2), which is sandwiched between the bearing pressure plate (2) and the CH1 rotor flange (4).

4. The dual-path revolute joint transmission structure for a millimeter wave antenna of claim 1, wherein: The stator base base (501) is provided with a housing (6) at the bottom. The bearing pressure plate (2) and the top positioning bearing (3) are concentrically assembled with the housing (6) to lock the CH1 coaxial module (5) and the CH1 rotor flange (4).

5. The dual-path revolute joint transmission structure for a millimeter wave antenna of claim 1, wherein: The lower half of the central group (1) is provided with a bottom positioning bearing (7), and the bottom positioning bearing (7) and the top positioning bearing (3) are symmetrically distributed on the outer surface of the central group (1).

6. The dual-path revolute joint transmission structure for a millimeter wave antenna of claim 1, wherein: The bottom of the outer surface of the central assembly (1) is provided with a CH2 connector (8) located on the inner surface of the outer shell (6), and a CH2 shift fork plate (9) is provided at the bottom of the CH2 connector (8), and the CH2 shift fork plate (9) rotates with the main shaft of the central assembly (1).

7. The dual-path revolute joint transmission structure for a millimeter wave antenna according to claim 6, characterized in that: The bottom of the CH2 connector (8) is provided with a stator flange (10), and the stator flange (10) is fixed to the CH2 connector (8) by screws.

8. The dual-path revolute joint transmission structure for a millimeter wave antenna according to claim 7, characterized in that: The inner surface of the stator flange (10) is provided with a CH2 coaxial joint (11) at the corresponding position of the CH2 shift fork plate (9), and the outer surface of the CH2 connecting seat (8) is provided with a single-path rotary connection mechanism (12).

9. The dual-path rotary joint transmission structure for millimeter-wave antennas according to claim 8, characterized in that: The single-path rotary connection mechanism (12) includes an upper coaxial docking boss channel (1201) located at the top of the CH2 connector (8), and a sealing pressure bearing layer (1202) is provided at the bottom of the upper coaxial docking boss channel (1201). A mounting plate (1203) is fixedly connected to the bottom of the sealing pressure bearing layer (1202), and a fixing through hole (1204) is opened on the inner surface of the mounting plate (1203). A limiting hexagonal positioning platform (1205) is provided at the bottom of the mounting plate (1203).

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