CN112201914B

CN112201914B - Rotary sliding contact mechanism

Info

Publication number: CN112201914B
Application number: CN202011046546.2A
Authority: CN
Inventors: 王申; 孟磊; 陈伟
Original assignee: 724th Research Institute of CSIC
Current assignee: 724th Research Institute of CSIC
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-11-16
Anticipated expiration: 2040-09-29
Also published as: CN112201914A

Abstract

The invention discloses a rotary sliding contact mechanism which is used for transmitting broadband signals in a microwave hinge and comprises an upper bearing, a lower bearing, a door knob, an upper end cover, a lower end cover, an upper medium ring, a lower medium ring, a transmission ring and a transmission seat. The door knob is connected with the upper end cover through a fastener, the contact surfaces of the upper end cover, the upper medium ring, the lower end cover and the lower medium ring are provided with half-moon-shaped rabbets, the upper medium ring and the lower medium ring clamp the transmission ring through clamping grooves, and therefore when the door knob is driven to rotate by external force, the upper end cover, the lower medium ring and the transmission ring can be driven to rotate coaxially. Meanwhile, the upper bearing and the lower bearing are respectively positioned at the upper end and the lower end of the mechanism, on one hand, the coaxial rotation of the whole mechanism is ensured, and on the other hand, the internal structural part is axially positioned. The transmission seat is in contact with the transmission ring through the contact pin, wherein the conversion sheet in the transmission seat has elasticity and can continuously provide the contact force required by the contact pin and the transmission ring. Meanwhile, the surface of the transmission ring is coated with palladium-nickel alloy, so that the wear resistance of the contact surface is improved.

Description

Rotary sliding contact mechanism

Technical Field

The invention belongs to the technical field of radar antennas and microwaves.

Background

The rotary sliding contact mechanism is an important component of the multi-path microwave hinge and is a broadband signal transmission path in the microwave hinge. Relative to the waveguide channel, the rotary sliding contact mechanism can meet the requirements of high signal working frequency and wide signal band range. However, such a rotary sliding contact mechanism has disadvantages of difficulty in structural realization, instability in signal transmission, low reliability, and the like.

In a method for realizing a four-channel high-power broadband rotating hinge (ZL201410321697.2), a rotating sliding contact mechanism is proposed to realize broadband signal transmission, and the mechanism has many defects that the contact parts are seriously worn after working for a short time, the coaxial rotation of the parts cannot be effectively ensured, and the problem of rotation clamping stagnation exists.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a rotary sliding contact mechanism.

The technical solution for realizing the purpose of the invention is as follows: a rotary sliding contact mechanism comprises a door knob, an upper end cover, a lower end cover, an upper medium ring, a lower medium ring, a transmission seat, an upper bearing and a lower bearing; the door knob is connected with the upper end cover through a fastener, half-moon-shaped rabbets are designed on contact surfaces between the upper end cover and the upper medium ring and between the lower end cover and the lower medium ring, the upper medium ring and the lower medium ring clamp the transmission ring through clamping grooves, and the wire routing grooves are formed in the door knob, the upper end cover and the upper medium ring; when the door knob is driven by external force to rotate, the upper end cover, the lower end cover, the upper medium ring, the lower medium ring, the transmission ring and the cable can be driven to coaxially rotate; the upper bearing and the lower bearing are positioned at the upper end and the lower end of the mechanism, on one hand, the coaxial rotation of the whole mechanism is ensured, and on the other hand, the inner structural part is axially positioned.

Further, the transmission seat comprises a conversion sheet, a pressing block, a positioning pin, an inner conductor and a contact nail; the material of the conversion sheet is beryllium bronze; the contact pin is made of beryllium bronze, and the surface of the contact pin is plated with gold; the positioning pin ensures that the conversion sheet is symmetrical relative to the inner conductor; the pressing block is used for shortening the force arm of pressure between the contact nail and the transmission ring.

Furthermore, the material of the transmission ring is beryllium bronze, the hardness range is HRC 35-HRC 39, and the surface of the transmission ring is coated with palladium-nickel alloy.

Further, the transmission seat is an independent module, the surface wear resistance of the contact nail is lower than that of the transmission ring, and the transmission seat can be replaced when the friction loss of the contact nail reaches a certain degree.

The invention has the advantages that: because the upper end cover, the lower end cover, the upper medium ring and the lower medium ring adopt a positioning mode of a half-moon-shaped spigot, and the transmission ring adopts a surface treatment method of plating palladium-nickel alloy and a support structure applying double bearings, the invention can effectively solve the problem of rotation clamping stagnation in the prior art.

Drawings

Fig. 1 is a schematic view of a rotary sliding contact mechanism of the present invention.

Fig. 2 is a schematic structural diagram of a transmission seat according to the present invention.

Number designation in the figures: 1. the device comprises a door knob, 2, an upper end cover, 3, a lower end cover, 4, an upper medium ring, 5, a lower medium ring, 6, a transmission ring, 7, a transmission seat, 8, an upper bearing, 9, a lower bearing, 10, a cable, 11, a fastener, 12, a conversion sheet, 13, a pressing block, 14, a positioning pin, 15, an inner conductor, 16 and a contact nail.

Detailed Description

The invention is further explained below with reference to the figures and examples.

As shown in fig. 1, the sliding contact mechanism of the present invention includes a door knob 1, an upper end cap 2, a lower end cap 3, an upper dielectric ring 4, a lower dielectric ring 5, a transmission ring 6, a transmission base 7, an upper bearing 8, a lower bearing 9, etc. The door knob 1 is connected with the upper end cover 2 through screws, and the contact surfaces between the upper end cover 2 and the upper medium ring 4, between the lower end cover 3 and the lower medium ring 5 are provided with half-moon-shaped rabbets, so that the end cover and the medium ring can coaxially rotate. The upper medium ring and the lower medium ring clamp the transmission ring 6 by utilizing the clamping grooves, and the wire grooves are opened on the door knob 1, the upper end cover 2 and the upper medium ring 4, so that the cable 10 can penetrate through the door knob 1, the upper end cover 2 and the upper medium ring 4 and then is connected with the transmission ring 6. When the door knob 1 is driven by external force to rotate, the upper end cover 2, the lower end cover 3, the upper medium ring 4, the lower medium ring 5, the transmission ring 6 and the cable 10 can be driven to coaxially rotate. Meanwhile, bearings are designed at the upper end and the lower end of the mechanism, copper strip gaskets can be reasonably added according to processing errors of parts during installation of the bearings, mutual compression between parts is guaranteed, the phenomenon of axial float is avoided, and the coaxiality of rotating parts is guaranteed to a certain extent by the bearings.

As shown in fig. 2, the transmission base 7 further includes a conversion plate 12, a pressing block 13, a positioning pin 14, an inner conductor 15, and a contact pin 16. The contact pin 16 is divided into an upper layer and a lower layer, and is welded on the upper and lower conversion plates 12 respectively. The conversion piece 12 is made of beryllium bronze (QBe2Y), has the hardness range of HRC 35-HRC 39 and has good elasticity. The distance between the upper contact nail and the lower contact nail 16 in a free state is smaller than the thickness of the transmission ring 6, after the transmission seat 7 and the transmission ring 6 are assembled, the elastic conversion sheet 12 can ensure that the contact nail 16 clamps the transmission ring 6 for a long time, the surface of the contact nail 16 is plated with gold (Cu/Ep. Au7.5), the surface of the transmission ring 6 is plated with palladium-nickel alloy (Cu/Ep. PdNi5Au0.2), the surface wear resistance of the contact nail 16 is slightly lower than that of the transmission ring 6, the transmission seat 7 can be replaced regularly, and effective contact between the transmission seat and the transmission ring can be ensured. The pressing block 13 is fixed on the upper and lower conversion sheets 12 in a welding mode, the pressure between the contact nail 16 and the transmission ring 6 is improved in a mode of shortening the force arm, and the contact reliability is improved to a certain extent. The positioning pins 14 ensure that the conversion plate 12 is mounted symmetrically with respect to the inner conductor 15.

Claims

1. A rotary sliding contact mechanism characterized in that:

the mechanism comprises a door knob (1), an upper end cover (2), a lower end cover (3), an upper medium ring (4), a lower medium ring (5), a transmission ring (6), a transmission seat (7), an upper bearing (8) and a lower bearing (9); wherein the transmission seat (7) also comprises a conversion sheet (12), a pressing block (13), a positioning pin (14), an inner conductor (15) and a contact pin (16); the material of the conversion sheet (12) is beryllium bronze; the contact pin (16) is made of beryllium bronze, and the surface of the contact pin is plated with gold; the positioning pin (14) ensures that the conversion sheet (12) is symmetrical relative to the inner conductor (15); the pressing block (13) is used for shortening the force arm of pressure between the contact nail (16) and the transmission ring (6); the door knob (1) is connected with the upper end cover (2) through a fastener (11), a half-moon-shaped spigot is designed on the contact surface between the upper end cover (2) and the upper medium ring (4), and between the lower end cover (3) and the lower medium ring (5), the upper medium ring (4) and the lower medium ring (5) clamp the transmission ring (6) through clamping grooves, and wiring grooves are formed in the door knob (1), the upper end cover (2) and the upper medium ring (4); when the door knob (1) is driven by external force to rotate, the upper end cover (2), the lower end cover (3), the upper medium ring (4), the lower medium ring (5), the transmission ring (6) and the cable (10) can be driven to coaxially rotate; the upper bearing and the lower bearing are respectively positioned at the upper end and the lower end of the mechanism, on one hand, the coaxial rotation of the whole mechanism is ensured, and on the other hand, the axial positioning is carried out on the internal structural part.

2. The rotary sliding contact mechanism according to claim 1, wherein:

the transmission ring (6) is made of beryllium bronze, has the hardness range of HRC 35-HRC 39, and is coated with palladium-nickel alloy on the surface.

3. The rotary sliding contact mechanism according to claim 1, wherein:

the transmission seat (7) is an independent module, the surface wear resistance of the contact nail (16) is lower than that of the transmission ring (6), and the transmission seat (7) can be replaced when the friction loss of the contact nail (16) reaches a certain degree.