A hydraulic vertical lifting rear platform

Abstract

This utility model discloses a hydraulic vertical lifting platform, including a support platform, a frame, and a transmission mechanism for driving the support platform to rise and fall along sliding guide rails on both sides of the frame. The transmission mechanism includes a hydraulic cylinder and a support rod horizontally mounted on the middle crossbeam of the frame, with the piston rod of the hydraulic cylinder connected to the support rod. Two sprockets are horizontally mounted on the support rod, and two chains are fitted to the two sprockets. One end of each chain is fixed to the middle crossbeam, and the other end, after changing direction, wraps around the two sprockets and at least one transition wheel mounted on the middle crossbeam, and then connects vertically to both sides of the support platform. This utility model ensures synchronous left and right lifting of the support platform while maintaining sufficient front and rear passage space.

Description

Technical Field

[0001] This utility model relates to the field of civil aviation equipment support vehicle operation technology, and in particular to a hydraulic vertical lifting rear platform. Background Technology

[0002] When civil aviation equipment vehicles dock with aircraft, they require a front platform and a rear platform. The front platform is raised to be level with the aircraft and the vehicle, while the rear platform is raised from the ground to be level with the vehicle. The vehicle then passes from the rear platform through the front platform to the aircraft, completing the ground-to-aircraft transport mission. Currently, the rear platform typically uses hydraulic cylinders on both sides to raise and lower it. However, the hydraulic cylinders on both sides cannot guarantee synchronous raising and lowering, posing a certain transport risk. Existing technology, such as Chinese Patent 2016109777575, discloses a steel frame structure with a hydraulic system as the power source. The hydraulic power unit generates high-pressure oil, which drives a piston cylinder upwards. A lifting beam is installed on the upper part of the piston cylinder, and a sprocket is mounted on the beam. One end of the chain is fixed to the lifting device, and the other end is fixed to the hydraulic cylinder. The rising of the hydraulic cylinder pushes the beam upwards, raising the platform. It descends by its own weight. However, due to the position and stroke limitations of the hydraulic cylinders, people or objects on the lifting platform cannot exit from the other side of the steel frame, failing to meet the passage space requirements for civil aviation equipment vehicles from the ground to the aircraft. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to provide a hydraulic vertical lifting rear platform that can ensure synchronous lifting of the carrying platform from left to right while ensuring passage space in front and behind.

[0004] Technical solution: The hydraulic vertical lifting platform of this utility model includes a bearing platform, a frame, and a transmission mechanism for driving the bearing platform to rise and fall along sliding guide rails on both sides of the frame. The transmission mechanism includes a hydraulic cylinder and a support rod horizontally mounted on the middle crossbeam of the frame. The piston rod of the hydraulic cylinder is connected to the support rod. Two sprockets are horizontally mounted on the support rod. Two chains are mounted on the two sprockets. One end of each chain is fixed to the middle crossbeam, and the other end of each chain is redirected around the two sprockets and at least one transition wheel mounted on the middle crossbeam and then vertically connected to both sides of the bearing platform.

[0005] Preferably, one end of each of the two chains is fixed to a chain fixing block on the middle crossbeam, and the chain fixing block is located on the side of the middle crossbeam near the oil cylinder.

[0006] Preferably, the two chains include a first chain and a second chain; one end of the first chain is disposed on a chain fixing block, and the other end is perpendicularly connected to one side of the bearing platform after changing direction around the first sprocket and the first transition wheel; one end of the second chain is fixed on the chain fixing block, and the other end is perpendicularly connected to the other side of the bearing platform after changing direction around the second sprocket, the second transition wheel, and the third transition wheel.

[0007] Preferably, the first transition wheel and the third transition wheel are respectively located on the middle crossbeam directly above both sides of the bearing platform.

[0008] Preferably, the first chain and the second chain are connected to the chain fixing block by bolts, which facilitates the adjustment of the chain tension.

[0009] Preferably, the support platform slides and rises along the sliding guide rails on both sides of the frame.

[0010] Preferably, the support platform is equipped with foldable guardrails.

[0011] Preferably, a folding door is provided on the frame above the middle crossbeam.

[0012] Beneficial effects: Compared with the prior art, this utility model has the following advantages: the hydraulic cylinder synchronously drives the double sprocket and double chain, which can ensure that the force at both ends of the lifting platform is uniform and the movement is synchronous, thus avoiding platform tilting; by setting the hydraulic cylinder, sprocket and transition wheel on the middle crossbeam, and keeping the middle crossbeam stationary, vertical installation space is saved, which facilitates forward and backward passage and meets the passage space requirements of civil aviation equipment vehicles from the ground to the aircraft. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the transmission mechanism structure of this utility model.

[0014] In the diagram, 1 is the load-bearing platform; 2 is the frame; 3 is the intermediate crossbeam; 4 is the chain fixing block; 5 is the hydraulic cylinder; 6 is the support rod; 7 is the first sprocket; 8 is the second sprocket; 9 is the first chain; 10 is the second chain; 11 is the first transition wheel; 12 is the second transition wheel; and 13 is the third transition wheel. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0016] like Figure 1-2 As shown, this utility model discloses a hydraulic vertical lifting platform, including a support platform 1, a frame 2, and a transmission mechanism for driving the support platform 1 to move up and down along the frame 2. The transmission mechanism includes a hydraulic cylinder 5, a support rod 6, a first sprocket 7, a second sprocket 8, a first chain 9, and a second chain 10. The hydraulic cylinder 5 is horizontally mounted on the middle crossbeam 3 of the frame 2, and the piston rod of the hydraulic cylinder 5 is connected to the support rod 6. The shafts of the first sprocket 7 and the second sprocket 8 are horizontally mounted on the support rod 6 and rotate as the support rod 6 moves horizontally.

[0017] The first chain 9 and the second chain 10 are respectively coupled to the first sprocket 7 and the second sprocket 8 for transmission. One end of the first chain 9 is fixed to the chain fixing block 4 on the intermediate crossbeam 3, and the other end, after changing direction around the first sprocket 7 and at least one transition wheel, is perpendicularly connected to one side of the support platform 1. One end of the second chain 10 is fixed to the chain fixing block 4, and the other end, after changing direction around the second sprocket 8 and at least one transition wheel, is perpendicularly connected to the other side of the support platform 1. Multiple transition wheels are provided on the intermediate crossbeam 3, acting as fixed pulleys to transmit horizontal power into vertical tension.

[0018] In this embodiment, the chain fixing block 4 is located on the side of the middle crossbeam 3 near the hydraulic cylinder 5. The other end of the first chain 9 is redirected after wrapping around the first sprocket 7 and the first transition wheel 11, and then vertically connected to one side of the support platform 1. The other end of the second chain 10 is redirected after wrapping around the second sprocket 8, the second transition wheel 12, and the third transition wheel 13, and then vertically connected to the other side of the support platform 1. The first transition wheel 11 and the third transition wheel 13 are respectively located directly above both sides of the support platform.

[0019] The first chain 9 and the second chain 10 are connected to the chain fixing block 4 by bolts, which facilitates the adjustment of chain tension and ensures that the bearing platform 1 is in a horizontal position.

[0020] The transmission mechanism also includes an external oil pump and pipelines to provide hydraulic oil to the cylinder.

[0021] The two ends of the support platform 1 connected to the two chains are slidably connected to the sliding guide rails on both sides of the frame 2. When the first sprocket 7 and the second sprocket 8 drive the first chain 9 and the second chain 10 to move, the two chains drive the support platform 1 to rise and fall along the sliding guide rails.

[0022] The carrying platform 1 is equipped with foldable guardrails.

[0023] A folding door is provided on the frame above the middle crossbeam 3, which allows people or objects on the lifting platform to pass through the door after rising to the position of the middle crossbeam.

[0024] The working principle of this utility model is as follows: An oil pump provides hydraulic oil, driving the piston rod of the cylinder 5 on the intermediate crossbeam 3 to push the support rod 6 horizontally. This causes the first sprocket 7 and the second sprocket 8 to move synchronously, with consistent movement distance and speed. The first sprocket 7 drives the first chain 9, and the second sprocket 8 drives the second chain 10. The first chain 9 and the second chain 10 move synchronously up and down at their ends via a transition wheel, thereby driving the support platform 1 to move up and down, with the left and right sides rising and falling synchronously. When the support platform 1 rises to the intermediate crossbeam 3, people or objects on the support platform 1 exit from the other side of the frame 2, thus providing front and rear passage space.

Claims

1. A hydraulic vertical lift rear platform characterized by, The system includes a support platform (1), a frame (2), and a transmission mechanism that drives the support platform (1) to move up and down along both sides of the frame (2). The transmission mechanism includes a hydraulic cylinder (5) and a support rod (6) horizontally mounted on the middle crossbeam (3) of the frame (2). The piston rod of the hydraulic cylinder (5) is connected to the support rod (6). Two sprockets are horizontally mounted on the support rod (6). Two chains are mounted on the two sprockets. One end of each chain is fixed on the middle crossbeam (3), and the other end is rotated around the two sprockets and at least one transition wheel mounted on the middle crossbeam (3) and then vertically connected to both sides of the support platform (1).

2. A hydraulic vertical lifting rear platform according to claim 1, characterized in that, One end of each of the two chains is fixed to a chain fixing block (4) on the middle crossbeam (3), and the chain fixing block (4) is located on the side of the middle crossbeam (3) near the oil cylinder (5).

3. A hydraulic vertical lifting rear platform according to claim 2, characterized in that The two chains include a first chain (9) and a second chain (10); one end of the first chain (9) is mounted on the chain fixing block (4), and the other end is perpendicularly connected to one side of the bearing platform (1) after changing direction around the first sprocket (7) and the first transition wheel (11); one end of the second chain (10) is fixed on the chain fixing block (4), and the other end is perpendicularly connected to the other side of the bearing platform (1) after changing direction around the second sprocket (8), the second transition wheel (12), and the third transition wheel (13).

4. A hydraulic vertical lifting rear platform according to claim 3, characterized in that, The first transition wheel (11) and the third transition wheel (13) are respectively located on the middle crossbeam (3) directly above both sides of the bearing platform.

5. A hydraulic vertical lifting rear platform according to claim 3, characterized in that, The first chain (9) and the second chain (10) are connected to the chain fixing block (4) by bolts.

6. The hydraulic vertical lifting platform according to claim 1, characterized in that, The carrying platform (1) slides and rises along the sliding guide rails on both sides of the frame (2).

7. A hydraulic vertical lifting platform according to claim 1, characterized in that, The carrying platform (1) is equipped with foldable guardrails.

8. A hydraulic vertical lifting platform according to claim 1, characterized in that, The frame (2) has a folding door in the space above the middle crossbeam (3).

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