A landing gear of a runner is retracted and extended with a cylinder

Abstract

The application relates to a landing gear with a rotating wheel realized by a telescopic actuating cylinder, and belongs to the field of aircraft structure design. The landing gear with a rotating wheel realized by a telescopic actuating cylinder comprises a strut outer cylinder, a wheel tire and a telescopic actuating cylinder, and further comprises a rotating wheel joint, a lock body mechanism and a connecting rod mechanism; the rotating wheel joint is installed on the strut outer cylinder and can rotate around the strut outer cylinder; the lock body mechanism is connected with the telescopic actuating cylinder and the rotating wheel joint, and drives the rotating wheel joint to rotate along with the telescopic actuating cylinder; the connecting rod mechanism is connected with the rotating wheel joint and the wheel tire respectively, and the wheel tire rotates along with the rotating wheel joint when the rotating wheel joint rotates. The application has the following advantages: 1. the relative position between the wheel and the strut changes along with the landing gear retraction, and the storage space can be more reasonably utilized; 2. no additional rotating wheel drive is added in the whole process, and the rotating wheel is realized only through the connecting rod mechanism, the control logic is simple, and the reliability is high.

Description

TECHNICAL FIELD

[0001] The application relates to a landing gear with a rotating wheel realized by a cylinder, and belongs to the field of aircraft structure design. BACKGROUND

[0002] In a traditional strut landing gear, the relative position between the wheel and the strut is fixed during the landing gear retraction and extension. In some landing gear designs, the space for storage is limited, so a rotating wheel mechanism is designed to change the relative position between the wheel and the strut after the landing gear is retracted, so as to fully utilize the storage space. Meanwhile, in order to ensure the reliability of the retraction and extension of the whole landing gear, the rotating wheel mechanism should meet the requirements of simple control logic and high reliability. SUMMARY

[0003] The application aims to provide a landing gear with a rotating wheel realized by a cylinder, which drives the landing gear rotating wheel through a connecting rod mechanism when the cylinder is retracted and extended.

[0004] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme: a landing gear with a rotating wheel realized by a cylinder, which comprises a strut outer cylinder, a wheel tire and a retraction and extension cylinder, and further comprises a rotating wheel joint, a lock body mechanism and a connecting rod mechanism; the rotating wheel joint is installed on the strut outer cylinder and can rotate around the strut outer cylinder; the lock body mechanism is connected with the retraction and extension cylinder and the rotating wheel joint, and drives the rotating wheel joint to rotate with the retraction and extension action of the retraction and extension cylinder; the connecting rod mechanism is connected with the rotating wheel joint and the wheel tire respectively, and the wheel tire rotates with the rotating wheel joint when the rotating wheel joint rotates.

[0005] Preferably, the outer surface of the rotating wheel joint is provided with a stop groove and two connecting lugs, the stop groove is used to limit the rotation of the rotating wheel joint, and the two connecting lugs are respectively arranged at the upper and lower ends of the rotating wheel joint and are used to connect the lock body mechanism and the connecting rod mechanism.

[0006] Preferably, the lock body mechanism comprises a lock body, a rocker arm and a gas spring, one end of the lock body is connected with the retraction and extension cylinder, the other end is a free end, and the lock body is connected with the lug provided on the strut outer cylinder through a pin shaft, when the retraction and extension cylinder is retracted and extended, the lock body rotates around the pin shaft, so that the free end is clamped into or separated from the stop groove; one end of the rocker arm is fixedly connected with the lock body, and the other end is connected with the gas spring; the other end of the gas spring is connected with the connecting lug located at the upper end of the rotating wheel joint.

[0007] Preferably, the connection between the lock body and the rocker arm is located at the pin shaft.

[0008] Preferably, double lugs are arranged at the connecting end of the lock body and the retraction and extension cylinder, the retraction and extension cylinder is inserted into the double lugs, and the lock body is connected with the retraction and extension cylinder through a connecting shaft penetrating through the lugs, and the axial direction of the connecting shaft is perpendicular to the axial direction of the pin shaft.

[0009] Preferably, the opening end of the stop groove is away from the center of the rotating wheel joint and faces the rotating direction of the lock body mechanism.

[0010] Preferably, the connecting rod mechanism comprises a piston rod, a torsion arm; one end of the torsion arm is connected with the connecting lug, and the other end is connected with the piston rod; one end of the piston rod is inserted into the rotating wheel joint; the machine wheel tire is fixedly connected with the piston rod; the rotating wheel joint rotates around the outer cylinder of the support, and drives the machine wheel tire to rotate through the torsion arm.

[0011] Working principle: when the landing gear is in the lowered state, the lock body mechanism rotating with the extension and retraction of the extension and retraction cylinder is clamped into the rotating wheel joint stop groove, preventing the rotating wheel joint from driving the machine wheel to rotate, and ensuring that the landing gear normally carries the ground. During the retraction process of the landing gear, the lock body mechanism gradually separates from the rotating wheel joint stop groove as the extension and retraction cylinder is extended, and after separation, the rotating wheel joint drives the machine wheel to rotate with the retraction of the landing gear.

[0012] Compared with the prior art, the present application has the following advantages:

[0013] 1. The relative position between the machine wheel and the support changes with the extension and retraction of the landing gear, which can more reasonably utilize the storage space.

[0014] 2. The entire process does not add additional rotating wheel drive, and only the connecting rod mechanism is used to realize the rotating wheel, the control logic is simple, and the reliability is high. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the lowered state diagram of the embodiment of the present application;

[0016] Figure 2 is a rotating wheel joint structure diagram in the embodiment of the present application;

[0017] Figure 3 is the unlocking process diagram of the embodiment of the present application;

[0018] Figure 4 is the completed unlocking diagram of the embodiment of the present application;

[0019] Figure 5 is the retracted state diagram of the embodiment of the present application;

[0020] Figures 1-5 In the figure: 1, outer cylinder of support; 2, gas spring; 3, rotating wheel joint; 3-1, stop groove; 3-2, connecting lug; 4, torsion arm; 5, machine wheel tire; 6, piston rod; 7, lock body; 8, rocker arm; 9, extension and retraction cylinder. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings Figures 1-5Further details of the present application: a landing gear for a rotating wheel realized by a retractable actuator, comprising a strut outer cylinder 1, a wheel tire 5 and a retractable actuator 9, further comprising a rotating wheel joint, a lock body mechanism and a connecting rod mechanism; the rotating wheel joint is installed on the strut outer cylinder 1 and can rotate around the strut outer cylinder 1; the lock body mechanism is connected with the retractable actuator 9 and the rotating wheel joint 3, and with the extension and retraction of the retractable actuator 9, the lock body mechanism drives the rotating wheel joint 3 to rotate; the connecting rod mechanism is connected with the rotating wheel joint 3 and the wheel tire 5 respectively, and when the rotating wheel joint 3 rotates, the wheel tire 5 rotates accordingly; the outer surface of the rotating wheel joint 3 is provided with a stop groove 3-1 and a connecting lug 3-2, the stop groove 3-1 is used to limit the rotation of the rotating wheel joint 3; the connecting lug 3-2 is provided in two numbers, one on the upper end and the other on the lower end of the rotating wheel joint 3, and is used to connect the lock body mechanism and the connecting rod mechanism; the lock body mechanism comprises a lock body 7, a rocker arm 8 and a gas spring 2; the connecting rod mechanism comprises a piston rod 6 and a torsion arm 4.

[0022] The specific structure is as follows:

[0023] A landing gear for a rotating wheel realized by a retractable actuator mainly comprises a strut outer cylinder 1, a gas spring 2, a rotating wheel joint 3, a torsion arm 4, a wheel tire 5, a piston rod 6, a lock body 7, a rocker arm 8 and a retractable actuator 9;

[0024] The rotating wheel joint 3 is installed on the strut outer cylinder 1 and can rotate around the strut outer cylinder 1. The torsion arm 4 is connected with the rotating wheel joint 3 and the piston rod 6 respectively, and the wheel tire 5 is fixedly connected with the piston rod 6, so that when the rotating wheel joint 3 rotates around the strut outer cylinder 1, the wheel tire 5 is driven to rotate by the torsion arm 4. The lock body 7 and the rocker arm 8 are fixedly connected and can rotate around the strut lug rotating shaft. One end of the retractable actuator 9 is connected with the fuselage, and the other end is connected with the lock body 7. One end of the gas spring 2 is connected with the rocker arm 8, and the other end is connected with the rotating wheel joint 3.

[0025] As shown in Figure 1 , when the landing gear is in the lowered state, the lock body 7 is clamped into the stop groove of the rotating wheel joint 3, preventing the rotating wheel joint 3 from rotating, and ensuring that the wheel tire in the lowered state is in the designed position to bear the ground load. As shown in Figure 2 , the opening end of the stop groove is away from the center of the rotating wheel joint 3 and faces the rotating direction of the lock body 7, so as to facilitate the clamping of the lock body 7.

[0026] When the retractable actuator 9 is extended, the lock body 7 rotates around the lug rotating shaft of the strut outer cylinder 1 and gradually separates from the stop groove of the rotating wheel joint 3, as shown in Figure 3 . The rocker arm 8 rotates with the lock body 7, driving the gas spring 2 to extend.

[0027] After the lock body 7 separates from the stop groove of the rotating wheel joint 3, as shown in Figure 4As shown, the gas spring 2 reaches the longest state, and then the gas spring 2 maintains the longest state. With the extension of the retraction actuator 9, the rocker arm 8 rotates, and the rotation of the wheel joint 3 is driven by the gas spring 2, so as to drive the rotation of the tire 5, until the landing gear reaches the retracted position.

[0028] When the landing gear is retracted, after the lock body 7 is clamped into the wheel joint 3 stop groove, since the wheel joint 3 cannot rotate, the rotation of the rocker arm 8 forces the gas spring 2 to shorten, and the retraction of the retraction actuator 9 needs to overcome the additional load generated when the gas spring 2 shortens.

[0029] The above embodiments are only preferred embodiments of the present application, and do not constitute a limitation on the present application. The rotation angle of the tire 5 is set according to specific needs, that is, the settings of the wheel joint 3, the gas spring 2, the rocker arm 8, etc. can change the angle. Any extension, deformation, equivalent replacement, etc. made by those of ordinary skill in the art without departing from the present application shall be included in the protection scope of the present application.

Claims

1. A landing gear that uses an actuation cylinder to retract and extend a wheel, comprising a strut outer cylinder, a wheel tire, and a retraction / extension actuation cylinder, characterized in that: It also includes a rotary joint, a locking mechanism, and a linkage mechanism; the rotary joint is installed on the outer cylinder of the support column and can rotate around the outer cylinder of the support column; the locking mechanism is connected to the retraction and extension actuator and the rotary joint, and the locking mechanism drives the rotary joint to rotate as the retraction and extension actuator moves; the linkage mechanism is connected to the rotary joint and the wheel tire respectively, and the wheel tire rotates when the rotary joint rotates. The outer surface of the rotary joint is provided with a stop groove and connecting lugs. The stop groove is used to limit the rotation of the rotary joint. There are two connecting lugs, which are respectively set at the upper and lower ends of the rotary joint and are used to connect the lock body mechanism and the linkage mechanism. The lock mechanism includes a lock body, a rocker arm, and a gas spring. One end of the lock body is connected to the retraction and extension actuator cylinder, and the other end is a free end. The lock body is connected to the lugs set on the outer cylinder of the support column by a pin. When the retraction and extension actuator cylinder extends or retracts, the lock body rotates around the pin, causing its free end to engage or disengage from the stop groove. One end of the rocker arm is fixedly connected to the lock body, and the other end is connected to the gas spring. The other end of the gas spring is connected to the connecting lugs located at the upper end of the rotating wheel joint.

2. The landing gear for realizing the rotation of the wheel by retracting and extending the actuator cylinder according to claim 1, characterized in that: The connection between the lock body and the rocker arm is located at the pin.

3. The landing gear for realizing the rotation of the wheel by retracting and extending the actuator cylinder according to claim 1, characterized in that: Double lugs are provided at the connection end between the lock body and the retraction / release actuator. The retraction / release actuator is inserted into the double lugs and connected to the lock body through a connecting shaft passing through the lugs. The axis of the connecting shaft is perpendicular to the axis of the pin.

4. The landing gear for realizing the rotation of the wheel by retracting and extending the actuator cylinder according to claim 1, characterized in that: The opening end of the stop groove is away from the center of the rotating wheel joint and faces the rotation direction of the lock body mechanism.

5. The landing gear for realizing the rotation of the wheel by retracting and extending the actuator cylinder according to claim 1, characterized in that: The linkage mechanism includes a piston rod and a torque arm; one end of the torque arm is connected to a connecting lug and the other end is connected to the piston rod; one end of the piston rod is inserted into the rotary joint; the wheel tire is fixedly connected to the piston rod; when the rotary joint rotates around the outer cylinder of the support column, it drives the wheel tire to rotate through the torque arm.

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