CN109192588B

CN109192588B - Travel switch with multiple signals

Info

Publication number: CN109192588B
Application number: CN201811101766.3A
Authority: CN
Inventors: 苟体平; 李贤富; 赵军
Original assignee: ZUNYI JINGXING AEROSPACE ELECTRICAL APPLIANCE CO Ltd; Guizhou Space Appliance Co Ltd
Current assignee: ZUNYI JINGXING AEROSPACE ELECTRICAL APPLIANCE CO Ltd; Guizhou Space Appliance Co Ltd
Priority date: 2018-09-20
Filing date: 2018-09-20
Publication date: 2020-08-11
Anticipated expiration: 2038-09-20
Also published as: CN109192588A

Abstract

The invention discloses a travel switch with multiple paths of signals, which comprises a static contact piece (4) and a movable contact piece, wherein the static contact piece (4) is arranged on a wiring pin (9), an even number of supporting seats (7) are annularly arranged on a substrate (8) to form a cage-shaped contact ring, a central spindle (12) is arranged in the center of the contact ring, a circle of movable contact piece is uniformly distributed on the outer surface of the central spindle (12), the movable contact piece and the static contact piece (4) form a sliding contact pair, every two movable contact pieces are connected to form a passage, the central spindle (12) is hollow, one end of the central spindle is sealed by a pushing disk (13), a spring (24) is arranged in the central spindle, and two ends of the spring (24) are respectively connected with. The invention changes the arrangement form of the contact group of the contact system, increases the backup of the number of the contact groups and improves the working reliability of the control system.

Description

Travel switch with multiple signals

Technical Field

The invention relates to a travel switch.

Background

With the continuous upgrading and improvement of the reliability requirement of the modern aerospace control system, the output of the travel switch is required to have multiple paths of signals, so that the control system can accurately identify the flight state of the aircraft and provide judgment basis for operating a command system. As a travel switch of a space system signal, the success or failure of the work of the travel switch directly determines the success or failure of the system to execute tasks. As shown in fig. 2, which is a structure diagram of a contact principle of a conventional travel switch, a mode that a cylindrical moving

contact

1 and 4 contact pieces 2 which are symmetrically and uniformly distributed are in sliding contact at the same time is adopted, and the moving contact 1 and a pushing column 3 are rigidly fixed linkage bodies. When the pushing column 3 is respectively pressed by the system or reset thrust, the movable contact 1 moves and is in sliding contact with the 4

contact pieces

2, and 1 group of signals are output. The traditional travel switch can only output 1 group of signals for hanging and popping or out of the box under the same compression stroke, has the defects of few control groups and no safe backup of the signals, and can not meet the requirement of the modern system for outputting multi-channel signals after being upgraded.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the problem that the existing travel switch can only output one path of signals, the travel switch capable of simultaneously outputting multiple paths of signals is provided.

The technical scheme of the invention is as follows:

a travel switch with multiple paths of signals comprises static contacts and movable contacts, wherein the static contacts are arranged on wiring pins, an even number of static contacts are annularly arranged on a base plate to form a cage-shaped contact ring, a central spindle is arranged in the center of the contact ring, a circle of movable contacts are uniformly distributed on the outer surface of the central spindle, the movable contacts and the static contacts form sliding contact pairs, every two movable contacts are connected to form a passage, the central spindle is hollow, one end of the central spindle is sealed by a pushing plate, a spring is arranged in the inner portion of the central spindle, and two ends of the spring are respectively connected with the base.

A base is arranged on the substrate, the base wraps the static contact piece, the base is connected with the actuating part through the corrugated diaphragm, and the corrugated diaphragm, the actuating part and the base form an actuating part combination with compressibility and air tightness through seal welding; the actuator is internally provided with a pushing column which is matched with the pushing disc.

The base plate is arranged on a fixed plate, a throwing cable is connected to the fixed plate, the welding wire end of the throwing cable is welded to the corresponding wiring pin through welding flux, each wiring pin is connected with a static contact piece, 8 movable contact pieces are provided in total, and every two opposite movable contact pieces are in a group and are connected through a mounting ring; an insulating bush is arranged between every two mounting rings, and the insulating bush is of an annular structure with a circular inner side and a regular polygon outer contour.

An insulating sleeve is arranged outside the shaft core, the insulating bush is connected with a fixed sleeve at the end part of the shaft core, and the mounting ring and the insulating bush are sleeved on the insulating sleeve.

The insulating bush is divided into an inner insulating sleeve and an outer insulating sleeve, the inner insulating sleeve is matched with the fixed sleeve, the outer insulating sleeve is matched with the boss at the middle section of the shaft core, and a rotation stopping key is arranged on the matching surface; and a rotation stopping clamping groove is arranged on the matching surface of the mounting ring and the insulating bush.

The guide sleeve is arranged on the end face of the substrate and is of an annular structure, and a circle of protective edge is arranged on the outer circumference of the annular structure.

The static contact piece is bent outwards and then inwards, and the free end is provided with a curved surface structure used for contacting with the movable contact piece; the wiring pin is provided with a supporting piece for supporting the outward bending section of the static contact piece.

The cross section of the inner wall of the upper protective edge on the outer circumference of the guide sleeve is a regular polygon, and an avoidance groove is processed on each inner wall surface; the outer end of the base plate is provided with a rear cover, the rear end of the outer cover is connected with the rear cover, and the front end of the outer cover is provided with an actuating part.

The invention has the beneficial effects that:

the travel switch of the invention increases the backup of the number of the contact groups by changing the arrangement form of the contact groups of the contact system so as to improve the working reliability of the control system. The utility model provides an adopt regular octagon to arrange sliding contact's contact system structure, adopts 4 groups of movable contacts of mutual insulation to constitute regular octagon contact subassembly, relies on two slip work planes in the movable contact outside and two contact piece contacts that correspond to realize the switch-on and the disconnection of control signal, and 4 way signal synchronization safety output realize high-quality operating characteristic.

Drawings

Fig. 1 is a schematic structural diagram of a travel switch according to the present invention.

Fig. 2 is a schematic diagram of a conventional structure.

Fig. 3 is a schematic view of the contact principle of the present invention.

Fig. 4 is a left side view of the contactor.

Fig. 5 is a front sectional view of the contactor.

Fig. 6 is a right side view of the contactor.

Fig. 7 is an exploded view of the moving contact assembly.

Fig. 8 is an assembled three-dimensional front view of the movable contact assembly.

FIG. 9 is a top view of the moving contact system.

FIG. 10 is a front cross-sectional view of the moving contact system.

Detailed Description

Example 1: this travel switch draws forth braced system by quiet contact system, move contact system, external force transmission system and quotation mark and constitutes, and quiet contact system includes: the fixed contact piece 4, the supporting piece 5, the welding material 6, the supporting seat 7, the base plate 8, the wiring pin 9, the fixed piece 10 and the fixed nut 11; the movable contact system includes: dabber 12, push disk 13, outer insulating sleeve 14, movable contact spring, insulating bush 16, collar, interior insulating sleeve 19 and fixed cover 20 are constituteed, and wherein the movable contact spring is equipped with 2N, 8 in this embodiment, and mutual interval 45 distributes on an octagon cylinder, and two parallel movable contact springs and collar are connected and are constituted movable contact subassembly, because the position of 4 collars is different, also has height difference with the tie point of movable contact spring, constitute 4 movable contact subassemblies respectively: movable contact 18 (# 1), movable contact 17 (# 2), movable contact 17 (# 3) and movable contact 15 (# 4). The external force transmission system includes: the actuating part 21, the pushing column 22, the corrugated diaphragm 23, the spring 24, the guiding sleeve 25 and the base 26, wherein the actuating part 21, the corrugated diaphragm 23 and the base 26 form an actuating part combination, and the actuating part combination, the static contact system, the dynamic contact system and the guiding sleeve 25 form a pushing mechanism; the signal leading-out support system comprises: the insulation pad 27, the solder 6, the throwing-out cable 28, the silicon rubber 29, the adhesive 30, the fixing plate 31, the fixing screw 32, the outer cover 33 and the rear cover 34.

Fig. 1 is a cross-sectional view of the overall structure of the present embodiment, the bellows diaphragm 23, the actuator 21 and the base 26 are sealed and welded to form a compressible and airtight actuator assembly, the inner cavity of the actuator 21 is cylindrical to provide a guiding sliding support for the push rod 22 and the spindle 12; the mouth of the base 26 is in a step-shaped circular ring shape, so that a limiting support is provided for the substrate 8 of the static contact system, and the base 26 and the substrate 8 are subjected to hermetic sealing and fusion welding after necking; the guide sleeve 25 is of a hollow structure, the axial large end of the guide sleeve is designed into a circular ring shape to provide axial support for the static contact system, a guard edge is arranged on the outer circumference of the circular ring, and the inner wall of the guard edge is axially provided with a regular octagonal opening to provide guide support for a regular octagonal sliding action surface of the movable contact system; the guide sleeve 25 is made of a non-metal material with self-lubricating performance, so that the guide and the friction reduction are facilitated, the service life of the sliding contact is prolonged, 8 uniformly distributed avoidance grooves are axially processed, and the assembly interference with the contact piece 4 is avoided; during assembly, the large opening end of the guide sleeve 25 is firstly installed from the working end face of the contact piece 4 to the direction of the base plate 8, the large end face is tightly attached to the

base plate

8, 8 contact pieces 1 are all located in corresponding avoidance grooves, then the pushing column 22, the movable contact system and the spring 24 are sequentially installed from the opening end of the base 26, meanwhile, the two ends of the spring 24 are respectively matched with the limiting bosses of the base plate 8 and the pushing disc 13 for limiting, finally, the static contact system is installed and press-fitted, and the press-fit peripheral ring is subjected to air-tight fusion welding;

as shown in the figure, a cable through hole is processed in the middle of the axial direction of the rear cover 34, a conical sealing interface is designed at the bottom of the tail end, when the cable is assembled, the welding wire end of the thrown cable 28 penetrates through the cable through hole from the tail end of the rear cover 34, the insulating gasket 27 is installed on the substrate 8 to realize the electrical insulation between the welding wire and the substrate, the welding wire end of the thrown cable 28 is welded to the corresponding wire connecting pin 9 through the welding material 6, the wire at the welding position is filled 803 with silicon rubber 29 to prevent temperature stress impact, and then the silicon rubber 29 is filled with an adhesive 30 for fixation; the fixing plate 31 is fixed to the fixing nut 11 by a fixing screw 32, and the thrown-out cable 28 is fixed by the fixing plate 31 in a pull-proof manner. Finally, the opening end of the rear cover 34 is fitted into the outer cover 33, and then the mouth is reduced and the end of the reduced mouth is welded and fixed.

Fig. 3 is a schematic diagram of a routine switch structure in accordance with an embodiment of the present invention. As shown in the figure, the sliding contact surfaces of the movable contact 18 (1 #), the movable contact 17 (2 #), the movable contact 17 (3 #) and the movable contact 15 (4 #) are sequentially arranged in the circumferential direction according to a step angle of 45 degrees to form a regular octagon with equal height, and are in one-to-one corresponding contact with 8 static contact pieces 4 on a static contact system; the two static contact pieces 4 with the number of 1 and the movable contact 18 form a 1# contact group, the two static contact pieces 4 with the number of 2 and the movable contact 17 form a 2# contact group, the two static contact pieces 4 with the number of 3 and the movable contact 17 form a 3# contact group, the two static contact pieces 4 with the number of 4 and the movable contact 15 form a 4# contact group, 4-path signals are synchronously switched and output but are mutually isolated and do not interfere with each other,

fig. 4-6 are front cross-sectional and left and right side views of a stationary contact system in accordance with an embodiment of the present invention. As shown in the figure, 8 wiring pins 9 are uniformly sintered and fixed on a substrate 8 to form a base assembly, a limiting cylindrical boss is designed in the middle of the substrate 8 in the axial direction to provide mounting support for a

spring

24, and 4 fixing nuts 11 are pressed and riveted on the substrate 8 and are laser-reinforced; the static contact 4 and the supporting sheet 5 are spot welded and then are pressed and riveted on the wiring pin 9, and the pressing and riveting end part of the wiring pin 9 is brazed and reinforced by adopting a solder 6; the width centers of the working faces of 8 static contacts 4 form a contact circle to ensure the consistency of the sliding contact pressure of all the static contacts 4 and corresponding contacts on the movable contact component; 8U-shaped opening supporting seats 7 are arranged between the substrate 8 and the supporting sheet 5 from corresponding wiring pins 9 to support the supporting sheet 5 and improve the rigidity of the static contact 4; the middle parts of two side surfaces of the supporting seat 7 are provided with limiting grooves corresponding to limiting bosses designed on two sides of the fixing piece 10, the fixing piece 10 is matched with a key groove to stop rotating after being installed, and the fixing piece 10 is connected with the base plate 8 through welding.

Fig. 7 is an exploded view of the contact assembly of a dynamic contact system in accordance with one embodiment of the present invention. The parts from left to right in the figure are a moving contact 18, an insulating bush 16, a moving contact 17 and a moving contact 15 in sequence; the movable contact 18, the movable contact 17 and the movable contact 15 are all of a structure that two ends of a connecting ring are connected with two parallel movable contact pieces, the horizontal part is of a circular ring-shaped structure and is a conductive part, the vertical parts at two sides are sliding contact working steps, the outer side surfaces of the steps are sliding contact working surfaces, and a sliding contact pair is formed by the steps and the static contact piece 4; the inner side is a limiting action surface which is correspondingly matched and limited with the outer contour regular octagonal side surface of the insulating bush 16; the insulating bush 16 is an annular structure with a circular inner side and a regular octagonal outer outline, is processed by adopting non-metallic materials to realize the electrical insulation between adjacent contacts, and is provided with a limiting clamping groove to prevent the movable contact 17, the movable contact 15 and the movable contact 18 from rotating in the circumferential direction after being assembled. The rectangular step of the movable contact 15 is provided with a limit step which is matched with a rotation stopping groove on the outer insulating sleeve 14 to realize rotation stopping of the contact assembly.

Fig. 8 is an assembled three-dimensional front view of a contact assembly of a dynamic contact system according to an embodiment of the present invention. As shown in the figure, after assembly, 8 sliding contact working faces are sequentially arranged on the outer side surface of the regular octagon of the insulating bush 16 at a step angle of 45 degrees, two sliding contact working faces of the same contact are symmetrically arranged, and the heights of the 8 sliding contact working faces are equal.

Fig. 9-10 are a front cross-sectional view and a top view of a travel switch movable contact system according to an embodiment of the present invention. The spindle 12 is shown as a sleeve structure with an inner hollow and an outer circle, and is provided with a rotation stop key for providing a mounting space for the spring 24 and supporting and positioning for the pushing disc 13; the outer contour of the outer insulating sleeve 14 is of a regular octagonal structure, the size of the outer contour is the same as that of a regular octagon formed by 8 equal sliding contact surfaces of the contact assembly, one side of the outer insulating sleeve 14, which is close to the contact assembly, is designed with symmetrically distributed rotation stopping grooves to be matched with rotation stopping keys on a movable contact 15 of the contact assembly, and the outer insulating sleeve 14 is processed by adopting a non-metallic material with self-lubricating performance, so that the guide and the friction reduction are facilitated; and sequentially installing the outer insulating sleeve 14, the contact assembly, the inner insulating sleeve 19 and the fixed sleeve 20 into the core shaft 12, respectively matching two symmetrical rotation stopping grooves of the outer insulating sleeve 14 with the movable contact 15 and a rotation stopping key of the core shaft 12 for rotation stopping, and expanding and riveting the opening part of the core shaft 12 to realize axial fixation of each part.

FIG. 9 is a three-dimensional front view of a movable contact system according to an embodiment of the present invention. As shown in the figure, by means of positioning of the rotation stopping key grooves, 8 equal-height sliding contact working faces of the regular octagon of the contact assembly and corresponding planes of the regular octagon of the outer insulating sleeve 14 form sliding switching planes respectively, and the sliding process of the static contact piece 4 is realized by means of switching of sliding positions between the sliding contact working faces and surfaces of the regular octagon of the outer insulating sleeve.

Claims

1. A travel switch with multiple signals comprises a static contact piece (4) and a movable contact piece, and is characterized in that: static contact (4) are installed on wiring foot (9), even number static contact (4) ring cloth is installed and is constituted a cage contact circle on base plate (8), contact circle central authorities are dabber (12), dabber (12) surface equipartition round movable contact, movable contact and static contact (4) quantity the same and one-to-one, form sliding contact pair, every two movable contact are a set of and connect through the collar and form the route, the collar suit is on dabber (12), set up insulating bush (16) between per two collars, dabber (12) cavity, one end is sealed with pushing away driving disk (13), internally mounted spring (24), base plate (8) and pushing away dish (13) are connected respectively to spring (24) both ends.

2. The travel switch with multiple signals according to claim 1, wherein: a base (26) is arranged on the substrate (8), the base (26) wraps the static contact piece (4), the base (26) is connected with the actuating part (21) through a corrugated diaphragm (23), and the corrugated diaphragm (23), the actuating part (21) and the base (26) form a compressible and airtight actuating part combination through sealing and welding; a pushing column (22) is arranged in the actuating part (21), and the pushing column (22) is matched with the pushing disc (13).

3. The travel switch with multiple signals of claim 2, wherein: the substrate (8) is installed on the fixing plate (31), the thrown-out cable (28) is connected to the fixing plate (31), the welding wire end of the thrown-out cable (28) is welded to the corresponding wiring pin (9) through the welding material (6), and each wiring pin (9) is connected with one static contact piece (4).

4. The travel switch with multiple signals of claim 2, wherein:

the number of the movable contact pieces is 8, and every two opposite movable contact pieces are in a group and are connected through a mounting ring; the insulating bush (16) is in an annular structure with a circular inner side and a regular polygon outer contour.

5. The travel switch with multiple signals of claim 4, wherein: an insulating sleeve is arranged outside the shaft core (12), the insulating sleeve is connected with a fixed sleeve (20) at the end part of the shaft core (12), and the mounting ring and the insulating bush (16) are sleeved on the insulating sleeve.

6. The travel switch with multiple signals of claim 4, wherein: the insulating sleeve is divided into an inner insulating sleeve (19) and an outer insulating sleeve (14), the inner insulating sleeve (19) is matched with the fixed sleeve (20), the outer insulating sleeve (14) is matched with a boss at the middle section of the shaft core (12), and a rotation stopping key is arranged on a matching surface; and a rotation stopping clamping groove is arranged on the matching surface of the mounting ring and the insulating bush (16).

7. The travel switch with multiple signals according to claim 3, wherein: the end face of the base plate (8) is provided with a guide sleeve (25), the guide sleeve (25) is of an annular structure, and a circle of protective edge is arranged on the outer circumference of the annular structure.

8. The travel switch with multiple signals of claim 7, wherein: the static contact piece (4) is bent outwards and then inwards, and the free end is provided with a curved surface structure for contacting with the movable contact piece; the wiring pin (9) is provided with a supporting sheet (5) for supporting the outward bending section of the static contact sheet (4).

9. The travel switch with multiple signals of claim 8, wherein: the cross section of the inner wall of the upper protective edge of the outer circumference of the guide sleeve (25) is a regular polygon, and an avoidance groove is processed on each inner wall surface.

10. The travel switch with multiple signals of claim 7, wherein: the outer end of the base plate (8) is provided with a rear cover (34), the rear end of the outer cover (33) is connected with the rear cover (34), and the front end of the outer cover (33) is provided with an actuating part (21).