Foldable catapult structure

Abstract

This invention discloses a foldable catapult structure. The catapult structure includes a base, an extension frame, a support plate, a wheel assembly, two foldable tracks, a cylinder assembly, multiple pressure chambers, two support rods, a platform, and two steel cables. Through the arrangement of the foldable tracks having a fixed section and a folding section, the support rods pivoting relative to the base, and a first quick-release mechanism between the two foldable tracks and a second quick-release mechanism between the support rods and the foldable tracks, the two foldable tracks and the two support rods can be quickly disassembled and reassembled for folding, thereby reducing the overall size and facilitating movement and transport.

Claims

1. A foldable catapult structure, comprising: A base; An extension frame is provided to extend rearward from one rear end of the base; A support plate extends rearward and downward from one rear end of the extension frame; a wheel assembly is disposed below the base; two foldable tracks are arranged at intervals and parallel to the axis of the base above the base and the extension frame, each foldable track extending forward beyond the base, and a buffer is provided at the end of each foldable track away from the base; a cylinder assembly is disposed between the two foldable tracks and between each foldable track and the base, the cylinder assembly having a double-rail pulley with two parallel steel cable tracks; a plurality of pressure chambers are arranged side by side within the base and communicate with the cylinder assembly through a control valve assembly; two support rods are arranged side by side, one end of each support rod is pivotally connected to the end of the base away from the extension frame, and the other end of each support rod is connected to the end of the corresponding foldable track with the buffer; A platform is removably and slidably mounted on the two foldable tracks and adjacent to the extension frame, and the platform has a hook at its front end; And two steel cables, one end of each steel cable is fixed to the base and located below the cylinder group, and sequentially passes upward around the corresponding steel cable track and extends to the hook of the platform for detachable hooking.

2. The retractable catapult structure as described in claim 1, wherein, The platform includes a body, at least four rollers, and the hook. The body is generally U-shaped and has at least one opening at the bottom. The at least four rollers are symmetrically arranged on both sides of the bottom of the body and are correspondingly arranged on the two foldable tracks. The hook extends forward from the bottom of the body.

3. The retractable catapult structure as described in claim 2 further includes a platform stop having a stop block, two first links, two second links, two elastic members, and two control handles. The stop block is disposed between the two foldable tracks and adjacent to the extension frame. The two first links are respectively disposed outside the two foldable tracks and connected to the stop block. The two second links are respectively connected to the two first links. The two control handles extend outward from the two second links. The two ends of each elastic member are respectively connected to the corresponding first link and the corresponding second link near one end of the corresponding control handle. The stop block is inserted into the at least one opening of the platform.

4. The retractable catapult structure as described in claim 1, wherein, Each of the foldable tracks has a fixed section and a folding section. The fixed section is disposed on the base, and the folding section is foldably connected to the fixed section and extends forward from the front end adjacent to the base. The buffer is disposed at the end of the corresponding folding section away from the fixed section.

5. The retractable catapult structure as described in claim 1, wherein, Each of the foldable tracks has a connecting plate disposed opposite to one end of the buffer member, and the connecting plate of each foldable track is detachably connected and fixed through a first quick-release member.

6. The retractable catapult structure as described in claim 1, wherein, Each of the support rods is connected to the end of the corresponding foldable track with the buffer via a second quick-release piece.

7. The retractable catapult structure as described in claim 1, wherein, The pressure chamber is a fluid cylinder.

8. The retractable catapult structure as described in claim 7 further includes a control box connected to the control valve assembly and configured to control the number and flow rate of the pressurized chambers through the control valve assembly.

9. The retractable catapult structure as described in claim 1, wherein, The wheel assembly includes two shock absorbers and two rotating wheels. The two shock absorbers are respectively located on the lower sides of the base, and the two rotating wheels are respectively located below the two shock absorbers.

10. The retractable catapult structure as described in claim 1 further includes a drag-retaining ring disposed at the end of the extension frame away from the base.

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