Dual-redundancy spring piece-contact actuating mechanism

Abstract

The utility model relates to the technical field of aeronautical instruments, and discloses a dual-redundancy spring piece-contact actuating mechanism which comprises a base, a movable contact assembly, two static contact assemblies and an ejector rob, the movable contact assembly is provided with two first contacts, the number of the static contact assemblies is two, and the ejector rob is provided with two second contacts. Each static contact assembly is provided with a second contact which can be in contact fit with the first contact, and the push rod is used for sensing the change of the sensitive element to drive the first contact to move so as to be in contact with or separated from the second contact. According to the utility model, the movable contact assembly is provided with the two first contacts, the two first contacts are matched with the two second contacts on the static contact assembly, and the push rod is used for sensing the change of the sensitive element to drive the first contacts to move so as to be in contact with or separated from the second contacts, so that when the switch outputs a double-switching-value signal, the double-switching-value signal is output; the on point and the off point of the switch keep a consistent minimum difference value, delay of starting and resetting of the switch is reduced, and it is ensured that two switching value signals are kept consistent when the double-value switch is on or off.

Description

TECHNICAL FIELD

[0001] The utility model relates to aviation instrument technical field discloses a kind of dual-redundancy spring piece-contact action mechanism. BACKGROUND

[0002] Generally, when realizing double-switch signal output, double microswitch, single-blade double-pole microswitch are often used in pressure / temperature switch products. The differential travel of microswitch is large, generally requiring 0.15-0.3mm displacement, which is equivalent to large hysteresis between triggering and recovery, making the pressure / temperature signal difference between switch output on and off larger, reducing the recovery accuracy of the switch and increasing the hysteresis of the switch. Secondly, the temperature resistance of microswitch is limited, and currently available microswitches on the market cannot be used in environments above 200℃. SUMMARY

[0003] The utility model discloses a kind of dual-redundancy spring piece-contact action mechanism, differential pressure between pressure measuring groove can be calculated out pneumatic angle, without any rotating mechanism, high reliability.

[0004] To achieve the above technical effects, the utility model adopts the technical scheme that:

[0005] A kind of dual-redundancy spring piece-contact action mechanism, comprising:

[0006] A base is provided with a central hole on the base;

[0007] A moving contact assembly comprises a first support sheet, and the first support sheet is provided with two first contacts;

[0008] A stationary contact assembly is fixed on the base, and the number of stationary contact assemblies is two. Two stationary contact assemblies are located on both sides of the central hole, and each stationary contact assembly is provided with a second contact that can contact and cooperate with the first contact.

[0009] A top rod is provided in the central hole, one end of the top rod is fixedly connected with the first support sheet, and the other end of the top rod is connected with a sensitive element. The top rod is used to drive the first contact to move to contact or separate from the second contact by sensing the change of the sensitive element.

[0010] Further, each moving contact assembly comprises two first screws fixed on the base, and a first arc spring sheet is fixedly installed between the two first screws. The first support sheet is fixed on the first arc spring sheet.

[0011] Further, two first nuts are provided on each first screw, and the installation position of the first arc spring sheet on the first screw is pressed between the two first nuts.

[0012] Further, the movable contact assembly is mainly riveted and fixed by the top rod with the first arched spring sheet, the first support sheet; the first contact on the movable contact assembly is further connected with a first conductive sheet; the first screw rod is further provided with a first insulating washer and a first insulating bushing; the first conductive sheet is compressed between the first insulating washer and the first insulating bushing.

[0013] Further, each static contact assembly comprises two second screw rods fixed on the base, a second support sheet is installed between the two second screw rods, and the second contact is arranged on the corresponding second support sheet.

[0014] Further, two second nuts are arranged on each second screw rod, and the installation position of the second support sheet on the second screw rod is compressed between the two second nuts.

[0015] Further, a second arched spring sheet is fixedly installed on each second support sheet, and the second contact is fixed on the second arched spring sheet.

[0016] Further, the static contact assembly is mainly riveted and fixed by two rivets with the second support sheet and the second arched spring sheet, and then two second insulating bushings and a second insulating washer are respectively bonded by epoxy resin glue at the positions between the second support sheet and the second arched spring sheet; the second contact is welded and installed on the rivet.

[0017] Compared with the prior art, the utility model has the beneficial effects that: the utility model is provided with two first contacts on the movable contact assembly, the two first contacts are matched with two second contacts on the static contact assembly, the first contact is driven to move by the change of the sensitive element to contact or separate from the second contact, the on-off points of the switch remain consistent with a very small difference when the switch outputs double switch signals, the hysteresis of the start and reset of the switch is reduced, and the two switch signals remain consistent when the double switch is turned on or turned off. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of the double-redundancy spring sheet-contact movable mechanism in the embodiment;

[0019] Figure 2 It is a schematic view of the position relationship between the first contact and the second contact in the embodiment;

[0020] Wherein, 1, base; 2, center hole; 3, first support piece; 4, first contact; 5, second contact; 6, top rod; 7, first screw; 8, first arched spring piece; 9, first nut; 10, first conductive piece; 11, first insulating washer; 12, first insulating bushing; 13, second screw; 14, second support piece; 15, second nut; 16, second arched spring piece; 17, second insulating bushing; 18, second insulating washer. DETAILED DESCRIPTION

[0021] The utility model will be described in further detail below in combination with the embodiments and drawings. But this should not be understood as the range of the above-mentioned subject matter of the utility model is limited to the following embodiments, and any technology realized based on the content of the utility model belongs to the range of the utility model.

[0022] EMBODIMENT

[0023] Referring to Figure 1 and Figure 2 A double-redundancy spring piece-contact action mechanism comprises:

[0024] A base 1 is provided with a center hole 2;

[0025] A moving contact assembly comprises a first support piece 3 provided with two first contacts 4;

[0026] A stationary contact assembly is fixed to the base 1, and the number of stationary contact assemblies is two, and two stationary contact assemblies are respectively located on both sides of the center hole 2, and each stationary contact assembly is respectively provided with a second contact 5 capable of contacting and cooperating with the first contact 4.

[0027] A top rod 6 is arranged in the center hole 2, one end of the top rod 6 is fixedly connected with the first support piece 3, and the other end of the top rod 6 is connected with a sensitive element; the top rod 6 is used for sensing the change of the sensitive element to drive the first contact 4 to move to contact or separate from the second contact 5.

[0028] In the embodiment, two stationary contact assemblies are arranged, the moving contact assembly is connected by the top rod 6, the moving contact assembly is provided with two first contacts 4, the two first contacts 4 cooperate with the two second contacts 5 on the stationary contact assembly, the top rod 6 senses the change of the sensitive element to drive the first contact 4 to move to contact or separate from the second contact 5, the on-off points of the switch remain consistent with a very small difference when the switch outputs double-switching signals, the hysteresis of the start and reset of the switch is reduced, and it is ensured that the two switching signals remain consistent when the double-switching switch is turned on or turned off.

[0029] In the embodiment, each of the movable contact assemblies comprises two first screw rods 7 fixed on the base 1, a first arched spring sheet 8 fixedly mounted between the two first screw rods 7, and the first support sheet 3 fixed on the first arched spring sheet 8. By designing the arched spring sheet on the movable contact assembly and the stationary contact assembly, reliable contact force of the first contact 4 and the second contact 5 can be ensured, reliable transmission of the switch signal can be ensured, and certain restoring force can be ensured after the first contact 4 and the second contact 5 are separated.

[0030] In the embodiment, two first nuts 9 are arranged on each of the first screw rods 7, and the mounting position of the first arched spring sheet 8 on the first screw rod 7 is pressed between the two first nuts 9. Not only the first support sheet 3 on the first spring sheet can be effectively fixed, but also the gap between the first contact 4 and the second contact 5 can be adjusted by pre-rotating and adjusting the position of one of the first nuts 9, so that the first contact 4 and the second contact 5 can normally realize micro-motion contact and separation.

[0031] In the embodiment, the movable contact assembly mainly rivets the first arched spring sheet 8 and the first support sheet 3 through the top rod 6. The first contact 4 on the movable contact assembly is further connected with a first conductive sheet 10, the first screw rod 7 is further provided with a first insulating washer 11 and a first insulating bushing 12, and the first conductive sheet 10 is pressed between the first insulating washer 11 and the first insulating bushing 12. When the movable contact assembly and the stationary contact assembly are in contact, the corresponding switch signal can be stably conducted through the first conductive sheet 10, so that reliable transmission of the signal can be realized.

[0032] Similar to the structure of the movable contact assembly, each of the stationary contact assemblies in the embodiment comprises two second screw rods 13 fixed on the base 1, a second support sheet 14 mounted between the two second screw rods 13, and the second contact 5 arranged on the corresponding second support sheet 14. Two second nuts 15 are arranged on each of the second screw rods 13, and the mounting position of the second support sheet 14 on the second screw rod 13 is pressed between the two second nuts 15. A second arched spring sheet 16 is fixedly mounted on each of the second support sheets 14, and the second contact 5 is fixed on the second arched spring sheet 16. The stationary contact assembly mainly rivets the second support sheet 14 and the second arched spring sheet 16 through two rivets, and then two second insulating bushings 17 and second insulating washers 18 are respectively bonded at the positions between the second support sheet 14 and the second arched spring sheet 16 through epoxy resin glue. The second contact 5 is welded and mounted on the rivet.

[0033] The second arched spring sheet 16 cooperates with the second screw 13 to realize stable support of the second contact 5. The second arched spring sheet 16 is also adjusted in position by the second nut 15 to ensure that the contact pressure and gap between the second contact 5 and the first contact 4 meet the design requirements. In addition, in order to ensure the stability of signal transmission, the second contact 5 is also connected with a second conductive sheet, and the second screw 13 is also provided with a second insulating washer 18 and a second insulating bushing 17 to prevent current leakage and ensure accurate conduction of the switch signal. The structural design of the entire stationary contact assembly aims to provide reliable electrical connection while ensuring the accuracy and repeatability of mechanical action.

[0034] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A dual-redundant spring tab-contact actuation mechanism, characterized by, The utility model relates to a contactor, which comprises: a base (1) provided with a central hole (2); a movable contact assembly comprising a first support plate (3) provided with two first contacts (4); a stationary contact assembly fixed to the base (1), the stationary contact assembly comprises two stationary contact assemblies, and the two stationary contact assemblies are respectively located on the two sides of the central hole (2), each stationary contact assembly is provided with a second contact (5) capable of contacting the first contact (4); a top rod (6) arranged in the central hole (2), one end of the top rod (6) is fixedly connected to the first support plate (3), and the other end of the top rod (6) is connected to a sensitive element; the top rod (6) is used for sensing the change of the sensitive element to drive the first contact (4) to move so as to contact or separate from the second contact (5).

2. The dual-redundant spring tab-contact actuation mechanism of claim 1, wherein, Each movable contact assembly comprises two first screws (7) fixed to the base (1), and a first arc spring plate (8) is fixedly arranged between the two first screws (7), and the first support plate (3) is fixed to the first arc spring plate (8).

3. The dual-redundant spring tab-contact actuation mechanism of claim 2, wherein, Each first screw (7) is provided with two first nuts (9), and the first arc spring plate (8) is compressed between the two first nuts (9) at the mounting position on the first screw (7).

4. The dual-redundant spring tab-contact actuation mechanism of claim 3, wherein, The movable contact assembly is mainly riveted by the first arc spring plate (8), the first support plate (3) and the top rod (6); the first contact (4) of the movable contact assembly is further connected to a first conductive plate (10), the first screw (7) is further provided with a first insulating washer (11) and a first insulating bushing (12), and the first conductive plate (10) is compressed between the first insulating washer (11) and the first insulating bushing (12).

5. The dual-redundant spring tab-contact actuation mechanism of claim 1, wherein, Each stationary contact assembly comprises two second screws (13) fixed to the base (1), and a second support plate (14) is arranged between the two second screws (13), and the second contact (5) is arranged on the corresponding second support plate (14).

6. The dual-redundant spring tab-contact actuation mechanism of claim 5, wherein, Each second screw (13) is provided with two second nuts (15), and the second support plate (14) is compressed between the two second nuts (15) at the mounting position on the second screw (13).

7. The dual-redundant spring tab-contact actuation mechanism of claim 5, wherein, Each second support plate (14) is fixedly provided with a second arc spring plate (16), and the second contact (5) is fixed to the second arc spring plate (16).

8. The dual-redundant spring tab-contact actuation mechanism of claim 6, wherein, The stationary contact assembly is mainly riveted by the second support plate (14) and the second arc spring plate (16), and then two second insulating bushings (17) and a second insulating washer (18) are respectively bonded at the positions between the second support plate (14) and the second arc spring plate (16) by epoxy resin glue; the second contact (5) is welded on the rivet.

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