A lever type lifting platform

Abstract

The present invention relates to a lever-type lifting platform to meet the needs of diversified lifting methods, different characteristics and applicable conditions of stage lifting platforms. The device includes a lifting platform body, which is characterized in that: lifting devices are respectively provided below the two ends of the lifting platform body, and the lifting device includes a large rotating wheel driven by a motor, and the side of the large rotating wheel is hinged to one end of a connecting rod, and the other end of the connecting rod is connected to a movable lever, one end of the movable lever is hinged to the end of the connecting rod, and the other end is hinged to the end of the bottom surface of the lifting platform body, and a support seat as a lever fulcrum is provided below the middle of the movable lever, and the support seat can slidably support the middle of the movable lever. The present invention adopts the principle of levers to reasonably arrange the lifting device, and uses connecting rods for compensation, and has low requirements for installation accuracy, so that the installation difficulty of the lifting platform is reduced and the use is more convenient and reasonable.

Description

Technical Field

[0001] The invention belongs to the field of stage machinery, relates to a lifting stage, and in particular to a lever-type lifting platform. Background Art

[0002] As people's living standards improve, their pursuit of spiritual civilization becomes higher and higher. Artists organize various performances and activities, which greatly enrich people's spiritual life. Most performances need to be performed on stage. In traditional stage performances, the stage is just a fixed platform. With the advancement of technology, the structure of the stage is becoming more and more diverse. The lifting platform stage is one of the variable stage mechanical structures, which greatly enriches the stage performance mode.

[0003] The main forms of existing stage lifts are wire rope lifting, gear rack lifting, large spiral, rigid chain, flexible rack, scissors fork, etc. Each type of stage lift has its own characteristics and applicable conditions. Summary of the invention

[0004] The present invention mainly aims at the problem that the lifting modes of stage lifting platforms are diversified, and have different characteristics and applicable conditions, and provides a lever-type lifting platform which is simple to manufacture and install, has strong applicability and a light structure.

[0005] The purpose of the present invention is mainly achieved through the following scheme: a lever-type lifting platform, including a lifting platform body, characterized in that: a lifting device is respectively provided below the two ends of the lifting platform body, the lifting device includes a large rotating wheel driven by a motor, the side of the large rotating wheel is hinged to one end of a connecting rod, the other end of the connecting rod is connected to a movable lever, one end of the movable lever is hinged to the end of the connecting rod, and the other end is hinged to the end of the bottom surface of the lifting platform body, and a support seat as a lever fulcrum is provided below the middle of the movable lever, and the support seat can slidably support the middle of the movable lever. This scheme utilizes the arc-shaped motion trajectory of the large rotating wheel and the arc-shaped motion trajectory of the movable lever, and uses the connecting rod for swing compensation, so that the lifting platform body can be lifted and lowered to any height, and the structure of this scheme is simple, easy to install, highly safe, and convenient and reasonable to use. Especially for stage facilities with foundation pits, the depth of the foundation pit can be effectively utilized to increase the maximum height of the lifting platform.

[0006] Preferably, the hinge point between the large rotating wheel and the connecting rod is offset relative to the rotating shaft of the large rotating wheel. The hinge point between the large rotating wheel and the connecting rod needs to be staggered with the rotating shaft of the large rotating wheel so that when the large rotating wheel rotates, the hinge point between the connecting rod and the large rotating wheel forms an arc motion trajectory, thereby driving the end of the movable lever up and down to drive the lifting platform up and down.

[0007] Preferably, the central axis and the circumference of the large impeller are connected via a plurality of spokes, and the hinge point between the large impeller and the connecting rod is located at the outer end of one of the spokes.

[0008] Preferably, the large rotating wheel is a large gear, the motor is connected to a driving gear via a reduction mechanism, and the driving gear is meshed with the large gear for transmission.

[0009] As a preferred embodiment, the lifting devices at both ends of the lifting platform body are synchronously driven by a motor. This solution can achieve smooth lifting of the lifting platform.

[0010] As a preference, the lifting devices at both ends of the lifting platform body are respectively provided with motors for independent driving. This solution can form an inclined stage as required.

[0011] Preferably, the top surface of the support seat is an arc surface. The movable lever can reasonably contact with the arc surface of the support seat during the up and down movement of the two ends, thereby reducing stress concentration.

[0012] Preferably, the bottom of the support seat is fixed to the ground foundation through a support frame.

[0013] Preferably, the bottom surface of the lifting platform body is an inverted "concave"-shaped structure with a high middle part and low ends, the lifting device is arranged below the middle part of the lifting platform body, and the hinge end of the movable lever and the lifting platform body is the outer end. The lifting device is arranged below the middle part of the lifting platform body, and the side of the lifting platform can shield the lifting device, so as to reasonably use the space.

[0014] The present invention makes full use of the space in the length direction of the stage, adopts the principle of lever to reasonably arrange the lifting device, and drives the stage lifting platform to lift and lower. Especially on a stage with a foundation pit, the depth of the foundation pit can be effectively used to increase the lifting height of the lever of the lifting platform; the arc motion trajectory of the large turntable is combined with the arc motion trajectory of the lever, and a connecting rod is used for compensation, so the installation accuracy requirement is low, the installation difficulty of the lifting platform is reduced, and the use is more convenient and reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Attached Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Attached Figure 2 It is a structural schematic diagram of a lifting device of the present invention.

[0018] Illustrations: 1. Movable lever, 2. Connecting rod, 3. Large gear, 4. Driving gear, 5. Support seat, 6. Support frame, 7. Large gear support, 8. Speed ​​reduction mechanism, 9. Motor, 10. Lifting platform body, 11. Ground foundation, 12. Articulated shaft. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0020] Embodiment: A lever-type lifting platform, such as Figure 1 As shown. The device includes a lifting platform body 10, and lifting devices are respectively provided below the two ends of the lifting platform body. The lifting devices are driven by the same motor 9, and the output end of the motor drives the two lifting devices synchronously through a splitter with one input and two outputs. Figure 2 As shown, for a single lifting device, the motor 9 is connected to the reduction structure 8 through a shaft splitter, the reduction mechanism is connected to the driving gear 4, the driving gear 4 is meshed with the large gear 3 for transmission, the middle part of the large gear is connected to the circumference through a number of spokes, the outer end of one of the spokes is rotatably connected to one end of the connecting rod 2 through a hinge shaft 12, the other end of the connecting rod 2 is connected to the inner end of the movable lever 1 through the hinge shaft 12, the outer end of the movable lever 1 is hinged to the end of the bottom surface of the lifting platform body 10, and a support seat 5 as a lever fulcrum is provided below the middle part of the movable lever 1, and the support seat can slidably support the middle part of the movable lever. The top surface of the support seat 5 is an arc surface, and the lower part of the support seat 5 is installed on the ground foundation 11 through a support frame 6, and the support frame includes a vertical rod, and an oblique support rod is provided on the outer side of the vertical rod to form a triangular support structure. The large gear 3 is firmly supported on the ground foundation 11 through the large gear support 7. The bottom surface of the lifting platform body 10 is an inverted "concave"-shaped structure with a high middle part and low ends. The lifting device is arranged below the middle part of the lifting platform body. The lifting devices are arranged at both ends below the middle part of the lifting platform body, and the motor 9 is arranged between the two lifting devices.

[0021] This solution combines the arc motion trajectory of the large gear's rotary motion with the arc motion trajectory of the movable lever, and uses a connecting rod to perform swing compensation, so that the lifting platform body can be lifted to any height. This solution has a simple structure and is easy to install. Especially on a stage with a foundation pit, the depth of the foundation pit can be effectively utilized to increase the lifting height of the lever of the lifting platform.

[0022] In this solution, the lifting devices at both ends are adjusted synchronously and lifted and lowered smoothly. When there is a special need for a tilted stage, two motors can be set up to independently control the lifting devices at both ends, so as to form a tilted stage. At this time, the movable levers of the two lifting devices have different postures, and through the automatic compensation of the connecting rod, they can obtain a stable support position by themselves.

Claims

1. A lever-type lifting platform, comprising a lifting platform body, characterized in that: A lifting device is provided below the two ends of the lifting platform body, respectively. The lifting device includes a large rotating wheel driven by a motor, the side of the large rotating wheel is hinged to one end of a connecting rod, the other end of the connecting rod is connected to a movable lever, one end of the movable lever is hinged to the end of the connecting rod, and the other end is hinged to the end of the bottom surface of the lifting platform body, and a support seat as a lever fulcrum is provided below the middle of the movable lever, and the support seat can slidably support the middle of the movable lever; The lifting devices at both ends of the lifting platform body are synchronously driven by a motor, or the lifting devices at both ends of the lifting platform body are independently driven by motors respectively; The hinge point between the large rotating wheel and the connecting rod is offset relative to the rotating axis of the large rotating wheel; and the top surface of the supporting seat is an arc surface.

2. A lever-type lifting platform according to claim 1, characterized in that: The central axis and the circumference of the large rotating wheel are connected via a plurality of spokes, and the hinge point between the large rotating wheel and the connecting rod is located at the outer end of one of the spokes.

3. A lever-type lifting platform according to claim 1, characterized in that: The large rotating wheel is a large gear, the motor is connected to a driving gear through a speed reduction mechanism, and the driving gear is meshed with the large gear for transmission.

4. A lever-type lifting platform according to claim 1 or 2, characterized in that: The lower part of the support seat is fixed on the ground foundation through a support frame.

5. A lever-type lifting platform according to claim 1 or 2, characterized in that: The bottom surface of the lifting platform body is an inverted "concave"-shaped structure with a high middle part and low ends. The lifting device is arranged below the middle part of the lifting platform body, and the hinged end of the movable lever and the lifting platform body is the outer end.

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