Front artificial leg for lightweight helicopter maintenance platform

Abstract

The utility model discloses a front artificial leg for a lightweight helicopter maintenance platform, and particularly relates to the technical field of helicopters, the front artificial leg comprises a support cylinder, a shaft bracket is welded on one side of the support cylinder, a shaft rod is rotatably mounted in the shaft bracket, a push-pull rod is hinged on one side of the top end of the support cylinder, and a rotating shaft is mounted at the bottom end of the support cylinder. The bottom end of the rotating shaft is sleeved with a fixing plate, the bottom end of the fixing plate is connected with a wheel frame, rolling wheels are installed at the bottom of the wheel frame, the bottom end of the rotating shaft penetrates through the fixing plate and is fixedly connected with the wheel frame, connecting plates are symmetrically installed on the fixing plate, and one end of the shaft rod is connected to the bottom of the maintenance platform in a bolted mode. The front artificial leg has the advantages that the whole structure is simple, the whole weight is light, an airplane can be supported and moved more conveniently in the maintenance process, meanwhile, the whole connection is firm, stress sharing can be carried out among a plurality of components, and therefore the stress strength of the front artificial leg is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of helicopter maintenance, and more specifically, the utility model relates to a front false leg for a lightweight helicopter maintenance platform. Background Art

[0002] During the assembly or maintenance process of a helicopter, a maintenance platform is often required to support the helicopter, so as to facilitate a comprehensive inspection of the bottom and top of the helicopter or the assembly of parts at various positions.

[0003] The utility model patent with the patent publication number CN212027638U discloses a helicopter engine maintenance working ladder, which includes a movable support ladder frame and a lifting maintenance ladder frame. The lifting maintenance ladder frame is fixedly installed on the movable support ladder frame. When the maintenance working ladder is moved to the side of the helicopter, by rotating the screwing head, the threaded rod moves downward, and the rubber cushion block contacts the ground, increasing the friction force to prevent the maintenance working ladder from sliding, facilitating the maintenance personnel to carry out maintenance, and there is no need for manual support, which is more convenient; by the telescopic end of the hydraulic telescopic cylinder to stretch or contract, the maintenance platform is lifted or lowered, so that the height of the maintenance platform can be adjusted to facilitate maintenance. By the connecting rod and the movable connecting block being engaged and connected through the engaging pin column and the engaging notch, when the maintenance platform is lifted and lowered, the movable support frame can smoothly extend and contract, improving the stability of the maintenance platform when it is lifted and lowered.

[0004] However, when this structure is actually used, the maintenance working ladder can conveniently perform maintenance or assembly on relatively high parts of the helicopter, but it cannot support the helicopter to adjust the support height so as to form a maintenance space at the bottom of the helicopter. As a result, when assembling and maintaining the bottom of the helicopter, there are space limitations, which will affect the maintenance or assembly efficiency of the helicopter. Therefore, a front false leg for a lightweight helicopter maintenance platform is proposed. Content of the Utility Model

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a front false leg for a lightweight helicopter maintenance platform to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A front false leg for a lightweight helicopter maintenance platform includes a support cylinder. One side of the support cylinder is welded with an axle frame. An axle rod is rotatably installed in the axle frame. One side of the top of the support cylinder is hinged with a push-pull rod. A rotating shaft is installed at the bottom end of the support cylinder. The bottom end of the rotating shaft is sleeved with a fixing plate. The bottom end of the fixing plate is connected with a wheel frame. A roller is installed at the bottom of the wheel frame. The bottom end of the rotating shaft passes through the fixing plate and the wheel frame and is fixedly connected. Connecting plates are symmetrically installed on the fixing plate.

[0007] Preferably, one end of the shaft rod is bolted to the bottom of the maintenance platform, and one end of the push-pull rod is connected to the telescopic system of the maintenance platform.

[0008] Preferably, connection heads are inserted and fixed at both ends of the push-pull rod, and both the push-pull rod and the support cylinder are of hollow structures.

[0009] Preferably, a convex ring is provided at the bottom end of the rotating shaft, and a groove is formed in the corresponding fixing plate. The convex ring is inserted and matched with the groove.

[0010] Preferably, slots are symmetrically formed at one end of the fixing plate, and connecting plates are fixedly inserted into each slot. The two connecting plates are used for installing a braking assembly.

[0011] Preferably, a steel plate is welded to the top of the wheel frame. A through hole is formed in the middle of the steel plate, and the bottom end of the rotating shaft is inserted through the through hole and connected to a locking nut.

[0012] The technical effects and advantages of the present utility model:

[0013] 1. Through the settings of the support cylinder, shaft frame, shaft rod, push-pull rod, rotating shaft, fixing plate, wheel frame and rollers, compared with the prior art, through the cooperation of the shaft rod and the push-pull rod, the support height of the front prosthetic leg for the maintenance platform can be adjusted. Thus, when the height of the maintenance platform is lowered, it is convenient to move the maintenance platform to the bottom of the helicopter. Then, when the maintenance platform is lifted by the front prosthetic leg, the helicopter can be lifted accordingly, creating a maintenance space with a certain height at the bottom of the helicopter, which is convenient for repairing or assembling parts at the bottom of the helicopter, thereby improving the efficiency of helicopter repair or assembly. With the support and movement of the rollers, the maintenance platform can move, so that the position of the supported helicopter can be adjusted, and the overall structure is simpler. With both the support cylinder and the push-pull rod being of hollow structures, the overall weight of the front prosthetic leg is reduced, and thus the weight of the entire maintenance platform is reduced, making the movement more convenient;

[0014] 2. Through the settings of the rotating shaft, fixed plate, convex ring, groove, wheel frame and roller, compared with the prior art, since the bottom end of the rotating shaft is fixedly connected to the wheel frame, the roller can automatically swing and move along the direction in which the maintenance platform advances under thrust. And when it is impacted during the movement, it can automatically swing and then reset, thereby reducing the magnitude of the direct impact force on the roller, and thus being able to unload the force on the whole front prosthetic leg, so as to improve the protection of the front prosthetic leg to ensure stable support under high-intensity operations. At the same time, by inserting the convex ring into the groove, while enabling the normal rotation of the rotating shaft, the fixing property of the connection between the rotating shaft and the fixed plate can be improved. At the same time, the lateral pressure received by the rotating shaft can be transmitted to the fixed plate, thereby reducing the intensity of the lateral pressure received by the rotating shaft, and thus ensuring the fixing property of the connection between the rotating shaft and the wheel frame, and thereby being able to increase the maximum force-bearing intensity at which the front prosthetic leg can work. Brief Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0016] Figure 2 It is a schematic diagram of the side view plane structure of the present utility model.

[0017] Figure 3 It is a schematic diagram of the front view plane structure of the present utility model.

[0018] Figure 4 It is a schematic diagram of the overall sectional structure of the present utility model.

[0019] Figure 5 It is a schematic diagram of the structure of the rotating shaft of the present utility model.

[0020] Figure 6 It is a schematic diagram of the structure of the fixed plate of the present utility model.

[0021] The reference numerals are: 1, support cylinder; 2, shaft frame; 3, shaft rod; 4, push-pull rod; 5, rotating shaft; 6, fixed plate; 7, wheel frame; 8, roller; 9, connecting plate; 10, convex ring; 11, slot; 12, groove. Detailed Description of the Preferred Embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] As shown in the attached Figure 1-6A front false leg for a lightweight helicopter maintenance platform as shown, including a support cylinder 1. One side of the support cylinder 1 is welded with a shaft frame 2. A shaft rod 3 is rotatably installed in the shaft frame 2. One side of the top of the support cylinder 1 is hinged with a push-pull rod 4. A rotating shaft 5 is installed at the bottom of the support cylinder 1. The bottom end of the rotating shaft 5 is sleeved with a fixing plate 6. The bottom end of the fixing plate 6 is connected with a wheel frame 7. A roller 8 is installed at the bottom of the wheel frame 7. The bottom end of the rotating shaft 5 passes through the fixing plate 6 and the wheel frame 7 and is fixedly connected. Two connecting plates 9 are symmetrically installed on the fixing plate 6. One end of the shaft rod 3 is bolted to the bottom of the maintenance platform. One end of the push-pull rod 4 is connected with the telescopic system of the maintenance platform. One end of the fixing plate 6 is symmetrically provided with slots 11. Each of the slots 11 is fixedly inserted with a connecting plate 9. The two connecting plates 9 are used for installing a braking component. A steel plate is welded at the top of the wheel frame 7. A through hole is opened in the middle of the steel plate. The bottom end of the rotating shaft 5 is inserted through the through hole and connected with a locking nut.

[0024] During specific implementation, by installing multiple front false legs at the bottom of the maintenance platform, connecting and fixing them with the maintenance platform through the shaft rod 3, and connecting one end of the push-pull rod 4 with the telescopic system of the maintenance platform, the whole front false leg is installed at the bottom of the maintenance platform. When the push-pull rod 4 receives the thrust of the telescopic system, the front false leg rotates with the shaft rod 3 connected to the shaft frame 2 welded on one side of the support cylinder 1 as the rotating shaft, so that the roller 8 installed on the bottom wheel frame 7 approaches the bottom of the maintenance platform, that is, the maintenance platform descends. At the same time, the roller 8 extends forward relative to the maintenance platform, so that the maintenance platform after the height drops can move closer to the bottom of the helicopter. When the push-pull rod 4 receives the pulling force of the telescopic system, the top end of the support cylinder 1 swings in the direction of the pulling force, so that the roller 8 at the bottom swings downward, lifting the whole maintenance platform, and then lifting the helicopter on the top of the maintenance platform, so that a certain height of maintenance space can be formed at the bottom of the helicopter, which is convenient for overhauling or assembling the helicopter, and can improve the efficiency of overhauling or assembling the helicopter.

[0025] For the maintenance platform supported by the front false leg, the maintenance platform can move the position of the helicopter at the top through the movement of the maintenance platform under the action of the roller 8, so that the maintenance position of the helicopter can be adjusted. When the maintenance platform slides, since the bottom end of the rotating shaft 5 is fixedly connected with the wheel frame 7, the roller 8 can automatically swing and move along the advancing direction of the helicopter, and can automatically swing and reset when being impacted during the movement, so as to reduce the magnitude of the direct impact force received by the roller, and can unload the force on the whole front false leg, thereby improving the protection of the front false leg to ensure stable support under high-intensity operation.

[0026] As shown in the attachment Figure 4 As shown, both ends of the push-pull rod 4 are inserted and fixed with connecting heads. The push-pull rod 4 and the support cylinder 1 are both hollow structures.

[0027] In specific implementation, by setting the support cylinder 1 and the push-pull rod 4 as hollow structures, the overall gravity of the front prosthetic leg can be reduced, thereby reducing the overall load of the maintenance platform, and making the movement of the maintenance platform more convenient.

[0028] As shown in the Figure 5 appendix Figure 6 As shown, a convex ring 10 is provided at the bottom end of the rotating shaft 5, and a groove 12 is formed in the corresponding fixing plate 6, and the convex ring 10 is in plug-in fit with the groove 12.

[0029] In specific implementation, by inserting the convex ring 10 into the groove 12, while enabling the rotating shaft 5 to rotate normally, the fixing property of the connection between the rotating shaft 5 and the fixing plate 6 can be improved. At the same time, the lateral pressure received by the rotating shaft 5 can be transmitted to the fixing plate 6, thereby reducing the intensity of the lateral pressure received by the rotating shaft 5, ensuring the fixing property of the connection between the rotating shaft 5 and the wheel carrier 7, and improving the maximum force-bearing intensity at which the front prosthetic leg can work.

[0030] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A front prosthetic leg for a lightweight helicopter maintenance platform, comprising a support tube (1), characterized in that: A shaft frame (2) is welded to one side of the support tube (1), a shaft rod (3) is rotatably installed in the shaft frame (2), a push-pull rod (4) is hinged to one side of the top end of the support tube (1), a rotating shaft (5) is installed at the bottom end of the support tube (1), a fixing plate (6) is sleeved at the bottom end of the rotating shaft (5), a wheel frame (7) is connected to the bottom end of the fixing plate (6), a roller (8) is installed at the bottom of the wheel frame (7), the bottom end of the rotating shaft (5) passes through the fixing plate (6) and is fixedly connected to the wheel frame (7), and a connecting plate (9) is symmetrically installed on the fixing plate (6).

2. The front prosthetic leg for a lightweight helicopter maintenance platform according to claim 1, characterized in that: One end of the shaft rod (3) is bolted to the bottom of the maintenance platform, and one end of the push-pull rod (4) is connected to the telescopic system of the maintenance platform.

3. The front prosthetic leg for a lightweight helicopter maintenance platform according to claim 2, characterized in that: Connectors are inserted and fixed at both ends of the push-pull rod (4), and both the push-pull rod (4) and the support tube (1) are hollow structures.

4. The front prosthetic leg for a lightweight helicopter maintenance platform according to claim 3, characterized in that: A convex ring (10) is provided at the bottom end of the rotating shaft (5), and a groove (12) is provided on the corresponding fixing plate (6), and the convex ring (10) is plug-fitted into the groove (12).

5. The front prosthetic leg for a lightweight helicopter maintenance platform according to claim 4, characterized in that: One end of the fixing plate (6) is symmetrically provided with slots (11), each of the slots (11) is fixedly plugged with a connecting plate (9), and the two connecting plates (9) are used to install the brake assembly.

6. The front prosthetic leg for a lightweight helicopter maintenance platform according to claim 5, characterized in that: A steel plate is welded to the top of the wheel frame (7), a through hole is opened in the middle of the steel plate, and the bottom end of the rotating shaft (5) is inserted through the through hole to be connected with a locking nut.

Images