CN210887835U

CN210887835U - Step lifting platform

Info

Publication number: CN210887835U
Application number: CN201921593007.3U
Authority: CN
Inventors: 阎海涛; 郑志荣; 李志信
Original assignee: Beijing Bette Shengdi Technology Development Co ltd
Current assignee: Beijing Bette Shengdi Technology Development Co ltd
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-06-30
Anticipated expiration: 2029-09-24

Abstract

The utility model provides a step elevating platform, step elevating platform includes: the device comprises a step frame, a parallelogram link mechanism, a walking wheel assembly, a walking track, a step lifting driving mechanism and a support frame; all the step racks are sequentially arranged in parallel from front to back; the left side and the right side of each step frame are respectively provided with the parallelogram link mechanism, and the walking wheel assembly is matched with the walking track fixedly arranged at the front end of the supporting frame. The utility model provides a step elevating platform and step elevating platform's drive method can realize the interconversion of step frame between step state and platform state simply, fast, efficient, still has the advantage that structural reliability is high.

Description

Step lifting platform

Technical Field

The utility model belongs to the technical field of stage machinery, concretely relates to step elevating platform.

Background

Along with the continuous development of economy in China, the quality of life of people is gradually improved, entertainment culture life is more rich and colorful, people often choose to watch stage performances as amateur life, and the requirements on stage performance means and forms are higher and higher.

With the continuous development and innovation of stage mechanical equipment, the performance means also become rich and colorful, thereby meeting the diversified requirements of program types.

For some scenarios, it is often necessary to change the stage from a platform to a step-like stage in order to achieve the desired stage effect. In the prior art, a manual operation mode is mainly adopted, so that the stage is changed into a step shape from a platform, and the problem of low operation efficiency is solved.

SUMMERY OF THE UTILITY MODEL

To the defect that prior art exists, the utility model provides a step elevating platform can effectively solve above-mentioned problem.

The utility model adopts the technical scheme as follows:

the utility model provides a step elevating platform, include: the device comprises a step frame (100), a parallelogram link mechanism (200), a walking wheel assembly (300), a walking track (400), a step lifting driving mechanism (500) and a support frame (600);

the number of the step racks (100) is multiple, and the step racks (100) are sequentially arranged in parallel from front to back; mounting the parallelogram linkage (200) on each of the left and right sides of each of the step frames (100), wherein the parallelogram linkage (200) comprises an upper swing arm (201) and a lower swing arm (202); the upper swing arm (201) and the lower swing arm (202) are arranged in parallel and have equal length; after each step frame (100) is vertically arranged, two hinge points are selected at the lower part of each step frame, namely an upper hinge point and a lower hinge point; the upper hinge point is rotatably connected with the upper swing arm (201) through a first rotating shaft (A1); the lower hinge point is rotatably connected with the lower swing arm (202) through a second rotating shaft (A2); the front ends of the upper swing arm (201) and the lower swing arm (202) are jointly provided with the walking wheel assembly (300); the walking wheel assembly (300) is matched with the walking track (400) fixedly arranged at the front end of the supporting frame (600);

the step lifting driving mechanism (500) comprises a motor reducer, a left driving mechanism and a right driving mechanism; the motor speed reducer is connected with the left side of the step frame (100) at the rearmost end through the left driving mechanism; the motor speed reducer is connected with the right side of the step frame (100) at the rearmost end through the right driving mechanism;

the left driving mechanism and the right driving mechanism have the same structure and respectively comprise a transmission shaft (501), a gear (502), a rack (503) and a support rod (504); the motor speed reducer is arranged at the center of the support frame (600), the transmission shaft (501) is horizontally arranged, one end of the transmission shaft (501) is linked with the motor speed reducer, and the other end of the transmission shaft (501) is fixedly provided with the gear (502); the rack (503) is vertically arranged, the lower end of the rack is meshed with the gear (502), the upper end of the rack is fixed with the bottom end of the support rod (504), and the top end of the support rod (504) is fixed to the bottom of the step frame (100).

Preferably, the walking wheel assembly (300) comprises a walking wheel support frame (301), a connecting transverse shaft (302), a left walking wheel (303) and a right walking wheel (304); the traveling wheel supporting frame (301) is fixed with the front ends of the upper swing arm (201) and the lower swing arm (202); the coupling transverse shaft (302) is arranged below the travelling wheel support frame (301), and the left travelling wheel (303) and the right travelling wheel (304) are rotatably arranged at two ends of the coupling transverse shaft (302).

Preferably, the device also comprises a step mechanism bracket (700); the step mechanism bracket (700) is arranged at the front end of the top of the support frame (600) and is positioned outside the walking track (400); a first limit switch (701) and a second limit switch (702) are respectively arranged on two sides of the step mechanism bracket (700); the connecting line of the first limit switch (701) and the second limit switch (702) is parallel to the walking track (400); and welding a collision block (305) on the side surface of the walking wheel assembly (300).

Preferably, the left traveling wheel (303) and the right traveling wheel (304) have flanges on both sides thereof, and the flanges are slidably engaged with the outer sides of the traveling rail (400).

The utility model provides a step elevating platform has following advantage:

the utility model provides a step elevating platform can realize simply, quick, the efficient that the step frame still has the advantage that structural reliability is high at the interconversion between step state and platform state.

Drawings

Fig. 1 is a schematic view of the overall structure of the step lifting platform provided by the present invention in a step state;

fig. 2 is a schematic view of the overall structure of the step-type elevating platform provided by the present invention in a planar state;

FIG. 3 is a schematic view of a part of the structure of the step platform provided by the present invention in a step state;

fig. 4 is a schematic view of a part of the structure of the step-type elevating platform provided by the present invention in a planar state;

fig. 5 is a schematic structural diagram of a parallelogram mechanism provided by the present invention;

fig. 6 is a front view of the arrangement of the traveling wheel assemblies at the left and right ends provided by the present invention;

fig. 7 is a simplified front view of the arrangement of the road wheel assemblies at the left and right ends provided by the present invention;

FIG. 8 is an individual block diagram of a walking wheel assembly provided by the present invention;

FIG. 9 is a cross-sectional view taken along line A-A of FIG. 5;

FIG. 10 is a cross-sectional view taken along line B-B of FIG. 5;

fig. 11 is a front view of the step lifting driving mechanism provided by the present invention;

fig. 12 is a side view of the step lifting driving mechanism provided by the present invention;

fig. 13 is a partially enlarged view of the step-up/down driving mechanism of the present invention.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1-13, the step-lift includes: the device comprises a step frame 100, a parallelogram link mechanism 200, a walking wheel assembly 300, a walking track 400, a step lifting driving mechanism 500 and a support frame 600;

the number of the step racks 100 is multiple, and the step racks 100 are sequentially arranged in parallel from front to back; in particular equidistantly arranged.

Referring to fig. 1, the definition of the front-to-back direction is illustrated. A parallelogram linkage 200 is installed on each of the left and right sides of each step frame 100, wherein the parallelogram linkage 200 includes an upper swing arm 201 and a lower swing arm 202; the upper swing arm 201 and the lower swing arm 202 are arranged in parallel and have equal length; referring to fig. 3, after each step frame 100 is vertically arranged, two hinge points, namely an upper hinge point and a lower hinge point, are selected at the lower part of the step frame; the upper hinge point is rotatably connected with the upper swing arm 201 through a first rotating shaft A1; the lower hinge point is rotatably connected with the lower swing arm 202 through a second rotating shaft A2; the front ends of the upper swing arm 201 and the lower swing arm 202 are jointly provided with a walking wheel assembly 300; the traveling wheel assembly 300 is engaged with the traveling rail 400 fixedly installed at the front end of the support frame 600.

As can be seen from FIG. 3, C1C2C3C4 is the four vertices of the parallelogram, which defines a largest parallelogram mechanism, and the hinge point of any two adjacent step racks defines a small parallelogram mechanism. For a large parallelogram mechanism or a small parallelogram mechanism, because four vertexes of the parallelogram mechanism are movably connected through a rotating shaft, and because the length of four sides of the parallelogram mechanism is fixed, in the change process of the parallelogram mechanism, the direction of the rearmost C1C2 is limited, namely: the C1C2 is always vertical, so that the hinge points of all the step racks 100 are always vertical, and the surface of each step rack 100 is kept horizontal in the change process.

Therefore, the upper plane of the step frame is always horizontal in the process of mutual conversion between the platform shape and the step shape through the parallelogram structure. Referring to fig. 1 and 2, it can be seen that the upper plane of the step frame is always horizontal in the step shape of fig. 1 and in the platform shape of fig. 2.

The utility model discloses in, step frame, swing arm are connected through parts such as round pin axle and bearing, can make step frame and swing arm rotate in a flexible way relatively, and frictional force is little.

In addition, the running rail 400 may be made of a square steel pipe. The road wheel of the road wheel component is provided with a flange. The stability of walking on the track of walking subassembly is guaranteed to and prevent to walk the in-process track that drops.

Referring to fig. 8 and 9, the road wheel assembly 300 includes a road wheel support bracket 301, a coupling cross shaft 302, a left road wheel 303, and a right road wheel 304; the traveling wheel support frame 301 is fixed with the front ends of the upper swing arm 201 and the lower swing arm 202; a coupling transverse shaft 302 is arranged below the travelling wheel support frame 301, and a left travelling wheel 303 and a right travelling wheel 304 are rotatably arranged at the two ends of the coupling transverse shaft 302 respectively. The left traveling wheel 303 and the right traveling wheel 304 have flanges on both sides thereof, and the flanges are slidably engaged with the outer sides of the traveling rail 400.

In addition, the utility model discloses still increase there is stop gear. As shown in fig. 4, further includes a step mechanism bracket 700; the step mechanism bracket 700 is disposed at the front end of the top of the support frame 600, outside the travel rail 400; a first limit switch 701 and a second limit switch 702 are respectively arranged on two sides of the step mechanism bracket 700; a connecting line of the first limit switch 701 and the second limit switch 702 is parallel to the traveling track 400; the striker 305 is welded to the side of the traveling wheel assembly 300. The second limit switch 702 is a limit switch in a step state. The first limit switch 701 is a limit switch when converted into a platform state, and respectively limits the platform state position and the highest step state position. The collision block touches one of the limit switches to send an electric signal, the control system stops the motor reducer, and the step mechanism bracket stops moving.

The step elevating driving mechanism 500 is used to implement the elevating movement of the rearmost step mechanism support 700. Referring to fig. 11-13, including a motor reducer, a left drive mechanism and a right drive mechanism; wherein, the motor reducer is connected with the left side of the step frame 100 at the rearmost end through a left driving mechanism; the motor reducer is connected with the right side of the step frame 100 at the rearmost end through a right driving mechanism; the left driving mechanism and the right driving mechanism are connected through a motor reducer, and synchronous and stable lifting of the left side and the right side of the step frame 100 can be achieved.

The left driving mechanism and the right driving mechanism have the same structure and respectively comprise a transmission shaft 501, a gear 502, a rack 503 and a support rod 504; the motor reducer is arranged at the center of the support frame 600, the transmission shaft 501 is horizontally arranged, one end of the transmission shaft 501 is linked with the motor reducer, and the other end of the transmission shaft 501 is fixedly provided with the gear 502; the rack 503 is vertically disposed, and has a lower end engaged with the gear 502, an upper end fixed to a bottom end of the rod 504, and a top end of the rod 504 fixed to a bottom of the step frame 100. Therefore, when the motor reducer rotates the gear 502 through the transmission shaft 501, the gear 502 drives the rack 503 to move vertically. The rack 503 drives the step rack at the rearmost side to move up and down through the rod member, so that the step mechanism completes the mutual conversion from the platform to the step.

The utility model also provides a step elevating platform driving method of step elevating platform, including following step:

step 1, the step frames 100 are connected into a whole through a parallelogram link mechanism 200, and the step frame 100 at the rearmost end is connected with a rack 503 through a support rod 504; the foremost step frame 100 slides on the walking track 400 through the walking wheel assembly 300 all the time, so the height of the foremost step frame 100 is kept unchanged all the time;

step 2, when the plane shape formed on the upper surface of each step frame 100 needs to be changed to the step shape, starting a motor reducer, and driving a gear 502 to rotate by the motor reducer through a transmission shaft 501; when the gear 502 rotates, the rack 503 engaged with the gear 502 is pushed to move upwards; when the rack 503 moves upward, the step frame 100 at the rearmost end is pushed up by the strut 504;

when the step frame 100 at the rearmost end is lifted, because the step frames 100 are connected into a whole through the parallelogram link mechanism 200, the walking wheel assembly 300 slides backwards along the walking track 400, when the walking wheel assembly slides to a position in contact with the first limit switch 701, the movement is in place, at the moment, the first limit switch 701 sends a signal of stopping the movement to the motor reducer, and the motor reducer stops moving;

in the above process, on one hand, each step frame 100 is fixedly assembled on the upper swing arm 201 and the lower swing arm 202, so that when the upper swing arm 201 and the lower swing arm 202 are changed from a horizontal state to an inclined state, the relative height of each step frame 100 is changed, and the step-like change of the upper surface of each step frame 100 is realized; on the other hand, since the respective step frame 100, the upper swing arm 201, and the lower swing arm 202 form a parallelogram link mechanism throughout the course of the change, the upper surface of each step frame 100 is always kept at a horizontal surface during the change;

and 3, when the step shape formed on the upper surface of each step frame 100 needs to be changed to the plane shape, starting the motor reducer, enabling the motor reducer to rotate reversely, so that the step frame 100 at the rearmost end descends, and enabling the walking wheel assembly 300 to slide forwards along the walking track 400 until the walking wheel assembly slides to a position in contact with the second limit switch 702, namely completing the change process from the step shape to the plane shape.

Of course, in practical applications, a driving device for driving the whole lifting of the supporting frame 600 may be additionally provided to complete the lifting of the whole device.

The utility model provides a step elevating platform sets up on the lift stage, include: the step mechanism comprises a step mechanism support, a swing arm, a traveling wheel assembly, step frames and a driving device, wherein the step frames are equidistantly arranged on the swing arm, the traveling wheel assembly is arranged at one end of the swing arm, the traveling wheel is matched with a track in the step mechanism support, the other end of the swing arm is connected with a rod piece, and the rod piece is driven by the driving device to perform lifting motion, so that the step frames complete the mutual conversion between a platform state and a step state; and, the upper surface of each step shelf can be protected to maintain a horizontal state during the conversion process. Because the gear rack mechanism is adopted to realize the lifting transmission, the lifting mechanism has the advantage of high structural reliability.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.

Claims

1. A step lift table, comprising: the device comprises a step frame (100), a parallelogram link mechanism (200), a walking wheel assembly (300), a walking track (400), a step lifting driving mechanism (500) and a support frame (600);

2. The step ladder of claim 1, wherein the walking wheel assembly (300) comprises a walking wheel support frame (301), a linking cross shaft (302), a left walking wheel (303), and a right walking wheel (304); the traveling wheel supporting frame (301) is fixed with the front ends of the upper swing arm (201) and the lower swing arm (202); the coupling transverse shaft (302) is arranged below the travelling wheel support frame (301), and the left travelling wheel (303) and the right travelling wheel (304) are rotatably arranged at two ends of the coupling transverse shaft (302).

3. The step riser of claim 2, further comprising a step mechanism support (700); the step mechanism bracket (700) is arranged at the front end of the top of the support frame (600) and is positioned outside the walking track (400); a first limit switch (701) and a second limit switch (702) are respectively arranged on two sides of the step mechanism bracket (700); the connecting line of the first limit switch (701) and the second limit switch (702) is parallel to the walking track (400); and welding a collision block (305) on the side surface of the walking wheel assembly (300).

4. The step ladder according to claim 2, wherein the left travelling wheel (303) and the right travelling wheel (304) have flanges on both sides, which flanges are slidingly caught on the outer side of the travelling rail (400).