A toggle drive mechanism for a landing gear control switch with toggle force

Abstract

The present invention discloses a pulling drive mechanism of a landing gear operating switch with a pulling force sense, comprising: a control rocker arm having a rocker arm pivoting portion; a graduated movable disk fixedly coupled to the rocker arm pivoting portion, the graduated movable disk and the rocker arm pivoting portion having a common rotation centerline, a graduated arc portion and a driving protrusion formed on the side of the graduated movable disk, the graduated arc portion and the driving protrusion being arranged front and back; a switch assembly, which is disposed on the left and right sides of the graduated movable disk, the switch assembly having a switch housing, a micro switch, a movable pressure plate, a buffer spring and a movable pressure pin; and a graduated fixed seat, which is disposed on the left and right sides of the graduated movable disk. The present invention has the beneficial effects of: having a pulling force sense function, a firm mechanism, a flexible operation process, and reliable limiting; the driving mode of the mechanism effectively prevents the switch handle from being not pulled into place, resulting in the circuit not being converted as required.

Description

Technical Field

[0001] The invention relates to a pulling driving mechanism of a landing gear operating switch with a pulling force feeling. Background Art

[0002] The landing gear control switch is a special switch used to control the retraction and extension of the aircraft landing gear. The landing gear control switch equipped with some old models does not have a sense of pulling force, and there is no pulling force feedback during the pulling process. Only after the handle is pulled into place, the handle can rely on its own pulling force to restore and lock. If the ground staff or the pilot does not pull the switch handle into place, the switch handle may remain in the non-working position (the "middle" position), and there is a dead point, resulting in the circuit not being converted as required, and the landing gear not receiving the retraction and extension command and not executing it, causing danger. Therefore, it is urgent to improve the pulling drive mechanism of the existing landing gear control switch. Summary of the invention

[0003] The technical problem to be solved by the present invention is that an operator cannot sense by touch whether a micro switch is switched to a certain position, and a novel driving mechanism for a landing gear operating switch with a sense of pulling force is provided.

[0004] In order to achieve this purpose, the technical solution of the present invention is as follows: a pulling drive mechanism of a landing gear control switch with a pulling force feeling, comprising:

[0005] A manipulation rocker having a rocker pivot portion;

[0006] An indexing movable plate, which is fixedly coupled to the swing lever pivot portion, the indexing movable plate and the swing lever pivot portion have a common rotation center line, an indexing arc portion and a driving protrusion are formed on the side surface of the indexing movable plate, and the indexing arc portion and the driving protrusion are arranged in front and behind each other;

[0007] A switch assembly is disposed on the left and right sides of the indexing movable disk, the switch assembly comprises a switch housing, a micro switch, a movable pressure plate, a buffer spring and a movable pressure pin, the switch housing comprises a housing top wall and a housing peripheral wall, the housing top wall and the housing peripheral wall jointly define a housing built-in space, the micro switch is disposed inside the housing built-in space, a top wall through hole communicating with the housing built-in space is formed on the housing top wall, the movable pressure plate comprises a pressure plate lower part and a pressure plate upper part, the pressure plate lower part is disposed inside the housing built-in space and above the micro switch, the bottom surface of the pressure plate lower part abuts against the top surface of the button in the micro switch, the pressure plate upper part extends upward from the top surface of the pressure plate lower part and passes through the top wall through hole, the movable pressure pin is disposed on the pressure plate upper part, the movable pressure pin corresponds to the driving protrusion, when the operating rocker swings to one side, the driving protrusion of the indexing movable disk on that side presses the movable pressure pin on that side to drive the micro switch on that side to operate; and,

[0008] The indexing fixed seat is placed on the left and right sides of the indexing movable disk. The indexing fixed seat is formed with a fixed seat chamber extending in the left and right directions. The interior of the fixed seat chamber is provided with a reset spring and a steel ball, and the steel ball is against the indexing arc.

[0009] As a preferred solution of the pulling drive mechanism of a landing gear operating switch with a pulling force, a combining hole is formed on the peripheral wall of the shell, and a combined hole corresponding to the combining hole is formed on the micro switch. A fixed connecting piece passes through the combining hole and the combined hole, so that the micro switch is fixedly combined with the switch shell.

[0010] As a preferred solution of the toggle drive mechanism of a landing gear control switch with a toggle force, a vertical pressure pin through-hole is formed on the movable pressure pin, a pressure pin head is arranged above the pressure pin through-hole and a pressure pin rivet edge is arranged below the pressure pin through-hole is formed on the movable pressure pin, the buffer spring surrounds the periphery of the movable pressure pin and is arranged between the bottom surface of the pressure pin head and the top surface of the upper part of the pressure plate, and the buffer spring is in a compressed state.

[0011] Compared with the prior art, the beneficial effects of the present invention are at least: it has a trigger force sensing function, a firm mechanism, a flexible operation process, and reliable limiting; the driving method of the mechanism effectively prevents the switch handle from being not turned into place, resulting in the circuit not being converted as required.

[0012] In addition to the technical problems solved by the present invention, the technical features that constitute the technical solution, and the beneficial effects brought about by the technical features of the technical solution described above, other technical problems that can be solved by the present invention, other technical features included in the technical solution, and the beneficial effects brought about by these technical features will be further described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the pull drive mechanism of the present invention.

[0014] Figure 2 It is a schematic diagram of the switch assembly of the pull drive mechanism of the present invention.

[0015] Figure 3 It is a cross-sectional view of the switch assembly of the pull drive mechanism of the present invention in the driving state.

[0016] Figure 4 It is a cross-sectional view of the pull drive mechanism of the present invention.

[0017] Figure 5 It is a schematic diagram of the indexing plate of the present invention. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below by means of specific embodiments in combination with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] See also Figures 1 to 5, the figure shows a toggle drive mechanism of a landing gear control switch with a toggle force sense. Rod component 1, spring 2, limit plate 3, indexing plate 4, switch assembly 5, spring washer 6, pan head screw 7, countersunk screw 8, steel ball 9, indexing seat 10, shell 11. Countersunk holes are provided on the left and right sides of the indexing seat 10, and threaded holes are provided on the left and right sides of the shell 11. The countersunk screw 8 fixes the indexing seat 10 on the shell 11. Two through circular holes are provided on both sides of the upper part of the indexing seat 10, and one rectangular through hole is provided on each side. The rectangular through hole is used to place the limit plate 3, and the through hole is used to place the spring 2 and the steel ball 9. A circular boss is provided in the middle of the shell 11, a circular hole is provided at the lower end of the rod component 1, and a circular hole is provided in the middle of the indexing plate 4. The circular boss of the shell 11 is used to place the rod component 1 and the indexing plate 4. The outer side of the indexing plate 4 is provided with a wave surface 4b of the indexing plate, which is used to provide toggle force after contacting the spring and the steel ball. A dividing plate driving head 4a is provided in the middle of the outer side of the dividing plate 4, which is used to contact the pressing pin 5a in the switch assembly 5. Two through holes are provided on the switch housing 5c ​​of the switch assembly 5, and two threaded holes are provided on the left and right sides of the bottom of the dividing seat 10, and the two are fixed by spring washers 6 and pan head screws 7. Two connecting beams are provided at the bottom of the dividing seat 10 to strengthen the strength of the dividing seat 10. A waist-shaped hole is provided at the bottom of the dividing seat 10.

[0020] The switch assembly 5 includes a pressing pin 5a, a buffer spring 5b, a switch housing 5c, a pressing plate 5d, a micro switch 5e, and a rivet 5f. The head of the pressing pin 5a is spherical, and the middle part is a cylindrical boss for placing the buffer spring 5b. The tail of the pressing pin 5a is provided with a groove, and the middle of the pressing plate 5d is provided with a circular through hole for riveting the limiting pressing pin 5a. The buffer spring 5b is used to provide a buffering force to prevent damage to the button of the micro switch 5e. The switch housing 5c ​​is provided with two circular holes on both sides, and the micro switch 5e is provided with two circular holes for placing the rivet 5f.

[0021] The above only expresses the implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A driving mechanism for a landing gear control switch having a pulling force feeling, characterized in that: Contains: A manipulation rocker having a rocker pivot portion; An indexing movable plate, which is fixedly coupled to the swing lever pivot portion, the indexing movable plate and the swing lever pivot portion have a common rotation center line, an indexing arc portion and a driving protrusion are formed on the side surface of the indexing movable plate, and the indexing arc portion and the driving protrusion are arranged in front and behind each other; A switch assembly is arranged on the left and right sides of the indexing movable disk, the switch assembly comprises a switch housing, a micro switch, a movable pressure plate, a buffer spring and a movable pressure pin, the switch housing comprises a housing top wall and a housing peripheral wall, the housing top wall and the housing peripheral wall jointly define a housing built-in space, the micro switch is arranged inside the housing built-in space, a top wall through hole communicating with the housing built-in space is formed on the housing top wall, the movable pressure plate is composed of a pressure plate lower part and a pressure plate upper part, the pressure plate lower part is arranged inside the housing built-in space and above the micro switch, the bottom surface of the pressure plate lower part abuts against the top surface of the button in the micro switch, the pressure plate upper part extends upward from the top surface of the pressure plate lower part and passes through the top wall through hole, the movable pressure pin is arranged on the pressure plate upper part, the movable pressure pin corresponds to the driving protrusion, when the operating rocker swings to one side, the driving protrusion of the indexing movable disk on that side presses the movable pressure pin on that side to drive the micro switch on that side to operate; as well as, An indexing fixed seat is disposed on the left and right sides of the indexing movable plate, and a fixed seat chamber extending in the left and right directions is formed on the indexing fixed seat, and a return spring and a steel ball are arranged inside the fixed seat chamber, and the steel ball abuts against the indexing arc; A coupling hole is formed on the peripheral wall of the housing, and a coupled hole corresponding to the coupling hole is formed on the micro switch, and a fixed connecting member passes through the coupling hole and the coupled hole, so that the micro switch is fixedly coupled to the switch housing; The movable pressure pin is formed with a vertical pressure pin through hole, and the movable pressure pin is formed with a pressure pin head placed above the pressure pin through hole and a pressure pin rivet edge placed below the pressure pin through hole. The buffer spring surrounds the periphery of the movable pressure pin and is placed between the bottom surface of the pressure pin head and the top surface of the upper part of the pressure plate, and the buffer spring is in a compressed state.

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