[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. Through the following detailed description, the present invention can be understood more completely and better and many of the accompanying advantages can be easily understood. However, the accompanying drawings described here are used to provide a better understanding of the present invention. A further understanding of the invention constitutes a part of this application. The exemplary embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.
[0029] Such as Figure 1 ~ Figure 5 As shown, the present invention provides a multi-plate automatic folding stage, which includes three sets of stages 10, three lifting mechanisms 20, three electric push rod mechanisms 30, a hoist 40, a push-pull device and a controller. The group stage 10 and the third group stage 10 are located at the two ends of the overall folding stage, and the second group stage 10 is located in the middle. Among them, the first, second, and third groups are only for distinguishing components, and do not represent the degree of importance and installation order. The two adjacent stages 10 are connected by connecting steel plates 50. Each stage 10 is composed of two stage boards 11, and the lower part of each stage 10 is provided with a lifting mechanism 20 and an electric push rod mechanism 30 respectively. The end of the first group of stages 10 is provided with a hoist 40, and a push-pull device is arranged on the base of the hoist 40; the middle of the end of the third group of stages 10 is provided with a reinforcing plate 60, and the reinforcing plate 60 is provided with a wire rope for connecting the hoist 40 41的 through hole 61. The lifting mechanism 20, the electric push rod mechanism 30 and the hoist 40 are all controlled by a controller. Since the three groups of stages 10 have the same structure and principle, one group of stages 10 is taken as an example to introduce the present invention in detail.
[0030] The two stage boards 11 in each stage 10 are connected by a folding single hinge 12; a lifting mechanism 20 is provided at the adjacent position of the two stage boards 11 and located below one of the stage boards 11. Located at the lower part of both sides of each stage board 11, there is a row of double-wheel racks 13 and a row of single-wheel racks 14 along the longitudinal direction of the stage board 11, which are used to install rolling wheels 15; The frames all use a single-wheel frame 14 and the other side uses a double-wheel frame 13, that is, the wheel frame at the two ends of each stage 10 is a double-wheel frame 13, and the wheel frame in the middle of each stage 10 is a single-wheel frame 14; and Each wheel frame and the stage board 11 are connected by a wheel frame hinge 16. On the adjacent two sets of stages 10, the adjacent two rows of double-wheel frames 13 are arranged in a staggered structure, and the staggered double-wheel frames 13 on the adjacent two sets of stages 10 are fixedly connected by connecting steel plates 50 to ensure that each Consistency of group stage 10 movement. The four adjacent wheel frames at the lower part of each stage board 11 are connected by linkage rods 17, and the linkage rod 17, the double wheel frame 13, the single wheel frame 14 and the lifting mechanism 20 form a parallelogram linkage mechanism to ensure The consistency of the actions of each wheel frame when folded or unfolded. During the stage folding process, each stage 10 slowly rotates upwards centered on the hinged position of the double-wheel frame 13 and the stage board 11. At this time, the state of the double-wheel frame 13 will not change, and the single-wheel frame 14 and lift The 20 frames of the mechanism slowly move upward as the stage rotates. Due to the existence of the linkage rod 17, when the two stage boards 11 are folded relative to each other (such as Image 6 (Shown), the single-wheel frame 14 and the lifting mechanism 20 are retracted inward to ensure that the single-wheel frame 14 and the lifting mechanism 20 do not interfere with the stage board 11 during the folding process of the stage.
[0031] In the above embodiment, each double-wheel frame 13 is provided with a limiting bracket 18, and the rolling wheel 15 is connected through the limiting bracket 18. When the stage is folded, the limiting brackets 18 on the two adjacent stages 10 are in contact. The folding position of the stage board 11 is limited by the limit bracket 18, and another stage 10 is driven to fold.
[0032] In the above embodiments, such as Figure 7 As shown, each lifting mechanism 20 adopts a shearing structure, which includes an upper end cover, a lead screw 21, a cross-shaped cross beam 22, a lifting motor 23, a lead screw nut 24 and a lower end cover 25, and a cross-shaped cross beam 22 The intersections are connected by pins 26. One end of the screw 21 is connected to the upper end of the cross beam 22, and this end of the screw 21 is also connected to a lifting motor 23, which is electrically connected to the controller; the other end of the screw 21 is sleeved with a screw nut 24 and then connected to ten The other end of the upper part of the zigzag cross beam 22. The upper part of the screw 21 is provided with an upper end cover, the lower part of the cross-shaped cross beam 22 is provided with a lower end cover 25, and the lower end of the cross-shaped cross beam 22 is fixed on the lower end cover 25, and the other end is provided with a wheel 27, which can slide on the lower end cover 25 . A rolling wheel (not shown in the figure) is also provided at the bottom of the lower end cover 25, and the rolling wheel forms a 90 degree angle with the wheel 27 on the other end of the lower part of the cross beam 22. The lifting motor 23 drives the lead screw 21 to rotate, so that the lead screw nut 24 sleeved on the lead screw 21 moves laterally along the lead screw 21, thereby changing the overall height of the lifting mechanism 20 and achieving the lifting effect.
[0033] In the above embodiments, such as Figure 8 As shown, each electric push rod mechanism 30 includes an electric push rod 31, a fixed-length rod 32, a rotating hinge 33 and a push rod roller 34. One end of the electric push rod 31 and one end of the fixed-length rod 32 are respectively connected to the lower part of a stage board 11 through a rotating hinge 33. The other end of the electric push rod 31 and the other end of the fixed-length rod 32 are hinged together to connect the push rod rollers. 34. The motor of the electric push rod 31 is electrically connected to the controller. The controller controls the work of the motor, and the electric cylinder of the electric push rod 31 changes the length of the push rod, so that the fixed-length rod 32 can make a circular motion around the hinge joint with the stage board 11. When the electric cylinder of the electric push rod 31 is in the initial position, that is, when the push rod is not pushed out, the fixed-length rod 32 and the electric push rod 31 are both attached to the stage board 11 to save space; when the electric cylinder of the electric push rod 31 is slow When the push rod is slowly pushed out, the fixed-length rod 32 makes a circular rotation. After a certain period of movement, the push rod roller 34 touches the other stage board 11 of the group of stages. While the electric cylinder continues to push the push rod out, The putter roller 34 slowly pushes the other stage board 11 away. When the stage 10 of the group is stretched to a certain extent, the gravity of the stage board 11 acts as the main driving force, and the stage 10 of the group is stretched out.
[0034] In the above-mentioned embodiments, the hoist 40 is equipped with a frequency converter, and the frequency converter is controlled by the controller. The winch 40 is also provided with a reverse locking mechanism. In the case of a sudden power failure of the winch 40, the reverse lock cannot be reversed. Therefore, the wire rope 41 of the winch 40 that pulls the stage cannot continue to extend, which effectively prevents the stage The danger of sliding and stretching by itself in the event of a sudden power failure.
[0035] In the foregoing embodiments, the push-pull device includes a worm gear, a worm nut, and a drive motor. The worm gear is connected with a drive motor fixed on the ground, and the drive motor drives the worm gear in both directions; the worm nut is arranged on the base of the hoist 40. When the worm rotates, the worm nut moves along the worm, and at the same time drives the hoist 40, the stage as a whole and the hoist 40 base to move along the hoist base guide rail.
[0036] In the above embodiments, there is a gap between the two adjacent sets of stages 10, and a movable stage board (not shown in the figure) is arranged in the gap to complement the stage surface. When folding the stage, just remove the movable stage board.
[0037] The present invention also provides a control method of a multi-plate automatic folding stage. The control method includes a folding control method of the folding stage and a stretching control method of the folding stage. Among them, the folding control method includes the following steps:
[0038] 1) Control the three lifting mechanisms 20 to raise so that there is a certain angle between the two stage boards 11 in each group of stages (such as Picture 9 (Shown), and at the same time, control the hoist 40 to take up the rope movement;
[0039] In order to ensure that the first group of stages, the second group of stages, and the third group of stages are folded in sequence in order to ensure that the folding sequence, the corresponding lifting mechanism 20 needs to be controlled. The lifting height relationship is h1> h3, h1 are the lifting height of the lifting mechanism 20 on the first group of stages, h2 is the lifting height of the lifting mechanism 20 on the second group of stages, and h3 is the lifting height of the lifting mechanism 20 on the third group of stages.
[0040] In this process, the overall length of the folding stage is shortened due to the elevation of the lifting mechanism 20. In this process, in order to prevent the wire rope from loosening, the hoist 40 must be controlled to perform a rope-retracting movement. The overall length of the folding stage changes at a non-uniform speed, so the winding speed of the hoist 40 must be adjusted by its frequency modulator to achieve the overall coordination effect.
[0041] 2) After completing step 1), control the hoist 40 to fold up the first stage at a constant speed (e.g. Picture 10 As shown), and control the lifting mechanism 20 on the first stage to retract and reset.
[0042] As the lifting mechanism 20 leaves the ground and cannot continue to provide support during this process, the lifting mechanism 20 on the first group of stages should be controlled to retract and reset at the same time.
[0043] 3) After folding the first group of stages until the bottom two limit brackets 18 touch, the first group of stages can no longer be folded. As the winch 40 is pulled at a constant speed, the pulling force is transmitted to the second group of stages and the second group of stages starts to be folded. Group stage (e.g. Picture 11 (Shown), while controlling the second group of stage board 11 lifting mechanism 20 to retract and reset. Similarly, the third group of stage boards 11 are folded again, and the stage folding is finally completed.
[0044] 4) After the stage is fully folded, the push-pull device drives the stage to move horizontally to adjust its storage position.
[0045] The stretching control method includes the following steps:
[0046] 1) First stretch the third stage, control the electric push rod mechanism 30 on the third stage to work, and push the two stage boards 11 apart (e.g. Picture 12 (Shown), and at the same time control the hoist 40 to do rope-laying movement;
[0047] Since stage stretching is the reverse process of stage folding, the third set of stages should be stretched first to ensure safety. In the initial stage of stretching the stage, the electric push rod mechanism 30 pushes the two stage boards 11 apart, and the angle between the two stage boards 11 gradually increases, so the length of the overall folding stage becomes longer, and the length of the overall folding stage changes non-uniformly. The speed of the hoist 40 should also be adjusted by its frequency converter to coordinate the overall movement.
[0048] 2) After completing step 1), after the angle between the two stage boards 11 in the third group of stages becomes larger, the gravity of the stage board 11 can be used to control the hoist 40 to draw the rope at a uniform speed to extend the stage, and at the same time control the electric push The lever mechanism 30 is retracted and reset (e.g. Figure 13 Shown).
[0049] In this process, since the electric push rod mechanism 30 can no longer provide thrust, it is necessary to control the electric push rod mechanism 30 to contract and reset at the same time.
[0050] 3) Control the lifting mechanism 20 to extend and land, and then slowly lower the lifting mechanism 20 and cooperate with the control hoist 40 to continuously release the ropes to stretch the third group of stage boards 11; The group stage stretches and flattens;
[0051] Such as Figure 13 As shown, when the third group of stages is extended to a certain position, because the angle γ between the stage board 11 and the ground is too small in this state, the pulling force system of the hoist 40 alone cannot provide sufficient pulling force, so the lifting mechanism 20 needs to be controlled. Stretch to the ground.
[0052] 4) After the stage is fully extended, the push-pull device drives the entire stage to move horizontally to adjust its placement.
[0053] The above embodiments are only used to illustrate the present invention. The structure, size, installation position and shape of each component can be changed. At the same time, the application of the mechanical structure principle and control method provided by the present invention is not limited to the folding stage. On the basis of the technical solution of the present invention, any improvement and equivalent transformation of individual components based on the principles of the present invention to derive folding mechanisms with the same principle (such as solar folding panels or some large and heavy folding equipment) are not It should be excluded from the protection scope of the present invention.
