CN111059139A

CN111059139A - Bellows connecting rod gap eliminating mechanism for altimeter

Info

Publication number: CN111059139A
Application number: CN201911301106.4A
Authority: CN
Inventors: 代彩彩; 吴慧龙; 张君; 姚秀娟; 袁宇杰; 连国栋
Original assignee: Taiyuan Aero Instruments Co Ltd
Current assignee: Taiyuan Aero Instruments Co Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-04-24
Anticipated expiration: 2039-12-17
Also published as: CN111059139B

Abstract

The invention provides a bellows connecting rod gap eliminating mechanism for an altimeter, which comprises a bellows, a connecting rod, an elastic support and a pin shaft, wherein the bellows is arranged on the connecting rod; the diaphragm capsule center is provided with the auricle, the connecting rod passes through round pin axle and auricle rotatable connection, the elastic support sets up between round pin axle tip and diaphragm capsule to provide elastic thrust between round pin axle tip and diaphragm capsule, make round pin axle tip hug closely the auricle hole, eliminate the clearance between round pin axle tip and the auricle hole. The invention eliminates the gap between the diaphragm capsule and the pin shaft, improves the sensitivity and the accuracy of the mechanism, and eliminates the gap caused by assembly error and assembly design.

Description

Bellows connecting rod gap eliminating mechanism for altimeter

Technical Field

The invention relates to the field of structural design of altimeters, in particular to a bellows connecting rod gap eliminating mechanism for an altimeter.

Background

A vacuum diaphragm box is arranged in a sealed watch case and used for sensing atmospheric static pressure from a static pressure sensor, when the altitude changes in flight, the atmospheric static pressure changes along with the change, so that the vacuum diaphragm box expands or contracts to generate linear displacement, the linear displacement is converted into a crank angle through a crank link mechanism, the crank angle is converted into a pointer angle after being amplified through a gear train, and the altitude is displayed on a dial. According to the traditional design, the diaphragm capsule lug and the connecting rod are hinged through the lock pin, the skill requirement on operators is high, if a gap exists between the connecting rod and the lug when the diaphragm capsule is not properly hinged, when the diaphragm capsule generates linear displacement, the zero drift of a product is easily caused by the gap, and the indicating accuracy of the product is influenced.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the gap between the bellows link mechanisms of the existing height gauge is eliminated, particularly the gap between the pin shaft and the lug hole and the gap between the bellows and the pin shaft.

The technical scheme is as follows:

the provided bellows connecting rod gap eliminating mechanism for the height gauge comprises a bellows, a connecting rod, an elastic support and a pin shaft;

the diaphragm capsule center is provided with the auricle, the connecting rod passes through round pin axle and auricle rotatable connection, the elastic support sets up between round pin axle tip and diaphragm capsule to provide elastic thrust between round pin axle tip and diaphragm capsule, make round pin axle tip hug closely the auricle hole, eliminate the clearance between round pin axle tip and the auricle hole.

Furthermore, the elastic support is an arc-shaped spring piece, the arc-shaped middle part of the spring piece supports the end part of the pin shaft, and the arc-shaped two ends of the spring piece are pressed on the film box to form elastic support. Preferably, the spring pieces are a pair of arc spring pieces and are symmetrically distributed at two ends of the pin shaft. More preferably, the arc-shaped spring piece is U-shaped. More preferably, the two ends of the spring plate form legs, and the legs are matched with the shape of the outer surface of the capsule.

Further, the elastic support comprises a spring and a shaft end supporting block, the shaft end supporting block is provided with a shaft groove for supporting the end part of the shaft, and the spring is arranged between the shaft end supporting block and the bellows to provide elastic support. Preferably, the spring is a coil spring or a leaf spring.

Furthermore, the elastic support is a supporting pad or a supporting block made of elastic materials. Such as rubber or an elastic composite.

The invention has the beneficial effects that: the clearance between the diaphragm capsule and the pin shaft is eliminated, the sensitivity and the accuracy of the mechanism are improved, and the clearance caused by assembly errors and assembly design is eliminated.

Drawings

FIG. 1 is a schematic structural view of the present invention (embodiment 1);

FIG. 2 is a schematic structural view of example 2;

FIG. 3 is a schematic structural view of embodiment 3;

FIG. 4 is a schematic view of an example of an arcuate spring plate;

FIG. 5 is a partial sectional view of embodiment 1;

wherein: 1-a capsule; 2-a connecting rod; 3-a pin shaft; 4-arc spring leaf; 5-a shaft end supporting block; 6-disc spring; 7-a rubber support pad or block; 8-ear piece.

Detailed Description

The following embodiments are given in conjunction with the accompanying drawings

Embodiment 1, refer to fig. 1, provide a bellows connecting rod gap eliminating mechanism for altimeter, including bellows, connecting rod, elastic support and pin;

The elastic support is an arc-shaped spring piece, the arc-shaped middle part of the spring piece supports the end part of the pin shaft, and the arc-shaped two ends of the spring piece are pressed on the film box to form elastic support. The arc-shaped spring piece is U-shaped. And support legs are formed at the two arc-shaped ends of the spring piece and are matched with the outer surface of the diaphragm capsule in shape.

Embodiment 2, see fig. 2, provides a bellows connecting rod gap eliminating mechanism for an altimeter, including a bellows, a connecting rod, an elastic support and a pin;

The elastic support comprises a spring and a shaft end supporting block, the shaft end supporting block is provided with a shaft groove for supporting the end part of the shaft, and the spring is arranged between the shaft end supporting block and the film box to provide elastic support. The spring is a disc spring.

Embodiment 3, see fig. 3, provides a bellows connecting rod gap eliminating mechanism for an altimeter, comprising a bellows, a connecting rod, an elastic support and a pin;

The elastic support is a rubber supporting pad or a rubber supporting block made of elastic materials.

Claims

1. The utility model provides a bellows connecting rod gap eliminating mechanism for altimeter which characterized in that: comprises a diaphragm capsule, a connecting rod, an elastic bracket and a pin shaft;

2. The bellows link anti-backlash mechanism for an altimeter of claim 1, wherein: the elastic support is an arc-shaped spring piece, the arc-shaped middle part of the spring piece supports the end part of the pin shaft, and the arc-shaped two ends of the spring piece are pressed on the film box to form elastic support.

3. The bellows link anti-backlash mechanism for an altimeter of claim 2, wherein: the spring pieces are a pair of arc spring pieces and are symmetrically distributed at two ends of the pin shaft.

4. The bellows link anti-backlash mechanism for an altimeter of claim 2, wherein: and support legs are formed at the two arc-shaped ends of the spring piece and are matched with the outer surface of the diaphragm capsule in shape.

5. The bellows link anti-backlash mechanism for an altimeter of claim 2, wherein: the arc-shaped spring piece is U-shaped or square-shaped.

6. The bellows link anti-backlash mechanism for an altimeter of claim 1, wherein: the elastic support comprises a spring and a shaft end supporting block, the shaft end supporting block is provided with a shaft groove for supporting the end part of the shaft, and the spring is arranged between the shaft end supporting block and the film box to provide elastic support.

7. The bellows link anti-backlash mechanism for an altimeter of claim 6, wherein: the spring is a spiral spring or a leaf spring.

8. The bellows link anti-backlash mechanism for an altimeter of claim 1, wherein: the elastic support is a supporting pad or a supporting block made of elastic materials.

9. The bellows link anti-backlash mechanism for an altimeter of claim 8, wherein: the supporting pad or the supporting block is made of rubber or elastic composite materials.