HYDRAULIC ELEVATING PLATFORM HAVING NO GUIDE RAILS AND ELEVATING METHOD

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.

Claims

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 according to claim 1, wherein guardrails are provided at landings where the lifting platform is to be docked.

4. 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.

5. 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.

6. 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.

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

8. 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.

9. 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.

10. 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 an eccentric load adjusting device arranged on the top part of the lower truss; wherein the upper truss, intermediate truss, and lower truss are fixedly connected to the lifting platform via support plates; wherein 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 hinged to the end of the upper electric push rod, so that 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; wherein the eccentric load adjusting device comprises a servo motor and a rotating platform, the rotating platform connected to the servo motor and arranged below a lower supporting guide frame; the lower supporting guide frame having a lower electric push rod fixedly connected to its top part, an eccentric load counterweight hinged to the end of the lower electric push rod, and the eccentric load counterweight moves on the lower supporting guide frame in an extending/retracting direction of the lower electric push rod; and wherein rollers are mounted on the bottom of the lower supporting guide frame, and are able to roll along a circular guide rail fixedly connected to the lower truss.

11. 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.

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

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

14. 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.

15. The hydraulic lifting platform of claim 11, 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.

16. 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.

17. The hydraulic lifting platform of claim 11, 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.

18. A method of using the rail-free hydraulic lifting platform of claim 10, the method comprising: driving the three parallel hydraulic cylinders to move synchronously via the hydraulic pump station to lift the lifting platform; when the lifting platform reaches to 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-swinging door between the lifting platform and the floor to form guardrails; opening the annular door 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, thereby balancing the center of gravity and eliminating the eccentric load of the platform

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1 is a front view of installation of the entire hydraulic lifting platform according to the disclosure;

[0022] FIG. 2 is a front view of the lifting platform according to this disclosure;

[0023] FIG. 3 is a top view of the platform transition device according to the disclosure;

[0024] FIG. 4 is a top view of the eccentric load adjusting device according to this disclosure;

[0025] FIG. 5 is a front view of the eccentric load adjusting device according to the disclosure;

[0026] FIG. 6 is a top view of the lower truss according to the disclosure.

[0027] In the figures: hydraulic pump station 1; parallel hydraulic cylinders 2; guardrails 3; telescoping sleeve protection covers 4; lifting platform 5; triangular fixing frame 6; handrails 5-1; bearing platform 5-2; annular door 5-3; outward-swinging door 5-4; upper truss 5-5; platform transition device 5-6; intermediate truss 5-7; lower truss 5-8; eccentric load adjusting device 5-9; vertical support plate 5-10; upper supporting guide frame 5-11; upper electric push rod 5-12; footstep assembly 5-13; servo motor 5-14; rotating platform 5-15; lower supporting guide frame 5-16; lower electric push rod 5-17; circular guide rail 5-19; roller 5-20; counterweight block 5-21; counterweighted frame 5-22; and counterweighted wheels 5-23.

DETAILED DESCRIPTION

[0028] Hereunder, this disclosure will be further detailed, with reference to the accompanying drawings:

[0029] As shown in FIG. 1, the rail-free hydraulic lifting platform provided in the disclosure comprises a hydraulic pump station 1 arranged in a machine room, three parallel hydraulic cylinders 2 and a lifting platform 5 arranged on the floor in a spiral staircase, wherein, the three parallel hydraulic cylinders 2 are arranged in an equilateral triangle layout, and the lifting platform 5 is fixed to the top of the three parallel hydraulic cylinders 2;

[0030] As shown in FIG. 2, the lifting platform 5 comprises a bearing platform 5-2, which is provided with handrails 5-1 on its top part, an annular door 5-3 and an outward-swinging door 5-4 arranged at its entrance and exit, and an upper truss 5-5 fixedly connected to its bottom part; an intermediate truss 5-7 and a lower truss 5-8 are arranged in parallel to each other below the upper truss 5-5, a platform transition device 5-6 is arranged on the top part of the intermediate truss 5-7, and an eccentric load adjusting device 5-9 is arranged on the top part of the lower truss 5-8; the upper truss 5-5, intermediate truss 5-7, and lower truss 5-8 are fixedly connected via vertical support plates 5-10;

[0031] As shown in FIGS. 2 and 3, the platform transition device 5-6 comprises an upper supporting guide frame 5-11 and an upper electric push rod 5-12 fixedly connected to the top part of the upper supporting guide frame 5-11, and a footstep assembly 5-13 is hinged to the right end of the upper electric push rod 5-12; the footstep assembly 5-13 can move on the top part of the upper supporting guide frame 5-11 in an extending/retracting direction of the upper electric push rod 5-12, and has a lifting mechanism arranged in it;

[0032] As shown in FIGS. 2, 4 and 5, the eccentric load adjusting device 5-9 comprises a servo motor 5-14 and a rotating platform 5-15, wherein, the rotating platform 5-15 is connected to the servo motor 5-14 and has a lower supporting guide frame 5-16 arranged above it; the lower supporting guide frame 5-16 has a lower electric push rod 5-17 fixedly connected to its top part, an eccentric load counterweight is hinged to the right end of the lower electric push rod 5-17, and the eccentric load counterweight can move on the lower supporting guide frame 5-16 in an extending/retracting direction of the lower electric push rod 5-17; rollers 5-20 are mounted on the bottom of the lower supporting guide frame 5-16, and can roll along a circular guide rail 5-19 fixedly connected to the lower truss 5-8.

[0033] Preferably, the eccentric load counterweight comprises counterweight blocks 5-21 mounted on a counterweighted frame 5-22, counterweighted wheels 5-23 are arranged on the bottom of the counterweighted frame 5-22, and the counterweighted wheels 5-23 are laid on the supporting guide frame 5-16.

[0034] As a further improved solution of this disclosure, guardrails 3 are provided at the landings where the lifting platform 5 is to be docked.

[0035] As a further improved solution of this disclosure, telescoping sleeve protection covers 4 are arranged between the bottom of the lifting platform 5 and a foundation, the bottom part of the telescoping sleeve protection covers 4 is fixed to the foundation, and the top part of the telescoping sleeve protection covers 4 is connected to the bottom of the lifting platform 5.

[0036] Furthermore, as shown in FIG. 6, in order to strengthen the stability of the parallel hydraulic cylinders, a triangular fixing frame 6 is fitted over the three parallel hydraulic cylinders 2, and the top surface of the triangular fixing frame 6 is welded to the bottom surface of the lower truss 5-8.

[0037] The lifting method of the rail-free hydraulic lifting platform is as follows:

[0038] (1) In the rail-free hydraulic lifting platform according to the disclosure, the three parallel hydraulic cylinders 2 are driven by the hydraulic pump station 1 to move synchronously, the relative positions of the three parallel hydraulic cylinders are fixed by means of the triangular fixing frame 6; thus, the stability is strengthened, and the lifting platform 5 can be lifted up smoothly and steadily; the guardrails 3 ensure that the persons can move in or out safely, the bottom part of the telescoping sleeve protection covers 4 is fixed to the foundation, the top part of the telescoping sleeve protection covers 4 is connected to the bottom of the lifting platform 5 and extends or retracts as the lifting platform 5 is lifted up or lowered down, in order to prevent the plungers of the hydraulic cylinders from being exposed to the outside to degrade the aesthetics and safety.

[0039] (2) When the lifting platform 5 reaches to a predetermined floor, the footstep assembly 5-13 on the bottom of the lifting platform 5 is pushed out by the upper electric push rod 5-12, and then the footsteps are lifted up by means of the lifting mechanism in the footstep assembly 5-13 so that the footsteps are flush with the surface of the bearing platform 5-2, and, at that moment, the outward-swinging door 5-4 between the lifting platform 5 and the floor is opened to form guardrails.

[0040] (3) After the actions of the footstep assembly 5-13 and the outward-swinging door 5-4 are completed, the annular door 5-3 is opened, and the persons can walk upstairs from the lifting platform 5 via the footstep assembly 5-13; a non-uniform distribution of the persons on the bearing platform 5-2 may cause the center of gravity of the system to deviate from the center of the bearing platform 5-2; when a pressure sensor arranged on the lifting platform 5 detects deviation of the center of gravity, the eccentric load is eliminated by means of the eccentric load adjusting device 5-9. The servo motor 5-14 is started to drive the rotating platform 5-15 to rotate, so that the rotating platform 5-15 drives the lower supporting guide frame 5-16 connected to it to rotate, the rollers 5-20 on the bottom of the lower supporting guide frame 5-16 roll along the circular guide rail 5-19 fixedly connected to the lower truss 5-8, and the lower supporting guide frame 5-16 rotates around the center of rotation to an angle corresponding to a direction opposite to the deviation position of the center of gravity.

[0041] (4) The eccentric load counterweight is driven by the lower electric push rod 5-17 to move, so that the counterweight blocks 5-21 are driven by the counterweighted wheels 5-23 to move in the extending/retracting direction of the lower electric push rod 5-17, and thereby the center of gravity is balanced and the eccentric load of the bearing platform 5-2 is eliminated.