Hydraulic elevating platform having no guide rails and elevating method

Patent metadata

Field	Value
Publication number	US-10399822-B2
Application number	US-201515542601-A
Country	US
Kind code	B2
Filing date	Dec 29, 2015
Priority date	Nov 27, 2015
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

A hydraulic elevating platform having no guide rails and an elevating method. A hydraulic power pack drives three parallel hydraulic cylinders to work synchronously, thereby implementing the rising and falling of an elevating platform; when the elevating platform reaches a predetermined floor, an upper electric pushrod pushes a pedal assembly out, and then the pedal assembly drives a pedal to rise by means of a pedal elevating system until the pedal is flush with the surface of a loading table of the elevating platform; outward-swinging doors between the elevating platform and a floor open to form pedal guardrails; then sliding doors open and a man can step onto a stair via the pedal assembly. An eccentric loading adjusting means eliminates eccentric loading to achieve balance about the center of gravity, thereby eliminating the eccentric loading of the platform. The elevating platform is simple in structure, safe, reliable, and easy to maintain. The elevating platform, placed within a spiral stair, is convenient for movement of crowds and cargo delivery at certain scenarios and is widely applicable. The elevating method is simple to implement and effectively solves the eccentric loading problem caused by reasons such as outstretching of a pedal of a hydraulic elevating platform and uneven distribution of people on the elevating platform, so that the hydraulic elevating platform is more stable and reliable during operation.

First claim

The invention claimed is:

1. A rail-free hydraulic lifting platform, comprising a hydraulic pump station, and three parallel hydraulic cylinders and a lifting platform arranged on the floor in a spiral staircase, the three parallel hydraulic cylinders are arranged in an equilateral triangle layout, and the lifting platform is fixed to the top of the three parallel hydraulic cylinders;
the lifting platform comprises a bearing platform, which is provided with handrails on its top part, an annular door and an outward-swing door arranged at its entrance and exit, and an upper truss fixedly connected to its bottom part; an intermediate truss and a lower truss are arranged in parallel to each other below the upper truss, a platform transition device is arranged on the top part of the intermediate truss, and an eccentric load adjusting device is arranged on the top part of the lower truss; the upper truss, intermediate truss, and lower truss are fixedly connected via vertical support plates;
the platform transition device comprises an upper supporting guide frame and an upper electric push rod fixedly connected to the top part of the upper supporting guide frame, and a footstep assembly is hinged to the right end of the upper electric push rod, the footstep assembly can move on the top part of the upper supporting guide frame in an extending/retracting direction of the upper electric push rod, and has a lifting mechanism arranged in it;
the eccentric load adjusting device comprises a servo motor and a rotating platform, the rotating platform is connected to the servo motor and has a lower supporting guide frame arranged above it; the lower supporting guide frame has a lower electric push rod fixedly connected to its top part, an eccentric load counterweight is hinged to the right end of the lower electric push rod, and the eccentric load counterweight can move on the lower supporting guide frame in an extending/retracting direction of the lower electric push rod; rollers are mounted on the bottom of the lower supporting guide frame, and can roll along a circular guide rail fixedly connected to the lower truss.

2. The rail-free hydraulic lifting platform according to claim 1 , wherein the eccentric load counterweight comprises counterweight blocks mounted on a counterweight frame, counterweight wheels are arranged on the bottom of the counterweight frame, and the counterweight wheels are laid on the lower supporting guide frame.

3. The rail-free hydraulic lifting platform of claim 2 , further comprising:
guardrails provided at landings where the lifting platform is docked.

4. The rail-free hydraulic lifting platform of claim 2 ,
wherein telescopic sleeve protection covers are arranged between the bottom of the lifting platform and a foundation,
wherein the bottom part of a sleeve protection cover is fixed to the foundation, and
wherein the top part of the sleeve protection covers is connected to the bottom of the lifting platform.

5. The rail-free hydraulic lifting platform of claim 2 , further comprising:
a triangular fixing frame fitted over the three parallel hydraulic cylinders, and wherein the top surface of the triangular fixing frame is fixedly connected to the bottom surface of the lower truss.

6. The rail-free hydraulic lifting platform according to claim 1 , wherein guardrails are provided at landings where the lifting platform is to be docked.

7. The rail-free hydraulic lifting platform according to claim 1 , wherein telescopic sleeve protection covers are arranged between the bottom of the lifting platform and a foundation, the bottom part of the sleeve protection covers is fixed to the foundation, and the top part of the sleeve protection covers is connected to the bottom of the lifting platform.

8. The rail-free hydraulic lifting platform according to claim 1 , wherein a triangular fixing frame is fitted over the three parallel hydraulic cylinders, and the top surface of the triangular fixing frame is fixedly connected to the bottom surface of the lower truss.

9. A method of using the rail-free hydraulic lifting platform of claim 1 , the method comprising:
driving the three parallel hydraulic cylinders to move synchronously via the hydraulic pump station, so that the lifting platform is lifted smoothly and steadily;
when the lifting platform reaches a predetermined floor, pushing out the footstep assembly arranged on the bottom of the lifting platform by means of the upper electric push rod, and then lifting up the footsteps by means of the lifting mechanism in the footstep assembly so that the footsteps are flush with the surface of the bearing platform, and, at that moment, opening the outward-swing door between the lifting platform and the floor to form guardrails;
opening the annular door after the actions of the footstep assembly and the outward-swing door are completed, so that a person can walk upstairs from the lifting platform via the footstep assembly; starting the servo motor to drive the rotating platform to rotate when a pressure sensor arranged on the lifting platform detects the deviation of the center of gravity, so that the rotating platform drives the lower supporting guide frame connected to it to rotate, and thereby the rollers on the bottom of the lower supporting guide frame roll along the circular guide rail fixedly connected to the lower truss and the lower supporting guide frame rotates around the center of rotation to an angle corresponding to a direction opposite to the deviation position of the center of gravity; and
driving the eccentric load counterweight by means of the lower electric push rod to move, so that the counterweight blocks are driven by the counterweight wheels to move in the extending/retracting direction of the lower electric push rod, and thereby the center of gravity is balanced and the eccentric load of the platform is eliminated.

10. The hydraulic lifting platform of claim 1 , wherein the eccentric load counterweight comprises counterweight blocks mounted on a counterweight frame, counterweight wheels are arranged on the bottom of the counterweight frame, and the counterweight wheels are laid on the lower supporting guide frame.

11. The hydraulic lifting platform of claim 10 , further comprising: guardrails provided at landings where the lifting platform is docked.

12. The hydraulic lifting platform of claim 10 ,
wherein telescopic sleeve protection covers are arranged between the bottom of the lifting platform and a foundation,
wherein the bottom part of a sleeve protection cover is fixed to the foundation, and
wherein the top part of the sleeve protection covers is connected to the bottom of the lifting platform.

13. The hydraulic lifting platform of claim 10 , further comprising:
a triangular fixing frame fitted over the three parallel hydraulic cylinders, and wherein the top surface of the triangular fixing frame is fixedly connected to the bottom surface of the lower truss.

14. A hydraulic lifting platform comprising:
a hydraulic pump station,
three parallel hydraulic cylinders arranged in an equilateral triangle layout, and
a lifting platform arranged on the floor in a spiral staircase and fixed to the top of the three parallel hydraulic cylinders, wherein the lifting platform comprises:
a bearing platform having handrails on its top part,
an annular door and an outward-swinging door arranged at its entrance and exit,
an upper truss fixedly connected to its bottom part;
an intermediate truss and a lower truss arranged in parallel to one another below the upper truss,
a platform transition device arranged on the top part of the intermediate truss, and
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Assignees

• Dongnan Elevator Co Ltd
• Univ China Mining

Inventors

• Zhu Zhencai
• Cao Guohua
• Qin Jiancong
• Wang Panda
• Peng Weihong
• Ma Lingyun
• Ma Yiping
• Gao Ming
• Yang Jianrong
• Wei Lei

Classifications

• B66B11/028

  Active systems · CPC title

• F15B2211/7107

  the output members being mechanically linked · CPC title

• E04F11/0201

  Space-saving stairways, e.g. having half steps · CPC title

• B66B9/04 Primary

  actuated pneumatically or hydraulically (platforms for lifting or lowering through short distances B66F7/00) · CPC title

• B66B11/006

  Applications of loading and unloading equipment for lifts associated with buildings (of general application B65G; for paternoster lifts B65G17/00; for mine lifts B66B17/14) · CPC title