Lifting device and platform lifting protection system

Abstract

The utility model belongs to the technical field of platform protection, and particularly provides a lifting device and a platform lifting protection system. The lifting device further comprises a spring balance mechanism, the spring balance mechanism comprises a spring coiling device, a cone pulley and a pull rope, the spring coiling device comprises a shell, a coil spring and a coil spring shaft, the two ends of the coil spring are connected with the shell and the coil spring shaft respectively, and the coil spring shaft can rotate on the basis that the shell is fixed on the fixed column or other parts relative to the fixed column. And one end of the pull rope is fixed on the cone pulley, and the other end of the pull rope is fixed on a wheel shaft of the driving wheel or the driven wheel, or the other end of the pull rope is fixed on a rope wheel which is connected with the wheel shaft of the driving wheel or the driven wheel in a rotation stopping manner. The platform lifting protection system comprises the lifting device. The spring balance mechanism is small in size, components opposite to the movement direction of the lifting column do not exist, momentum increase in the movement process cannot be caused, the requirement for the installation space of the lifting device is reduced, and the lifting speed of the lifting device is increased conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of platform protection, and particularly relates to a lifting device and a platform lifting protection system. Background Art

[0002] The existing railway platforms in my country are generally open platforms. Some passengers have weak safety awareness and often walk around the platform safety line at will. Once a passenger accidentally falls from the platform, it may cause a serious safety accident. In addition, my country has now formed an efficient railway network, with billions of passengers traveling by train every year. The need to configure a safety protection system on railway platforms is imminent.

[0003] Unlike subway platform protection, the parking position of high-speed rail or ordinary passenger trains is difficult to control accurately, which requires the safety protection system to open a wider passenger passage as much as possible when opening the door. The Chinese invention patent application with application publication number CN116464383A (publication date: 2023.07.21) discloses a screen door structure for a high-speed rail platform, which is composed of a fixed column (fixed column), a lifting column, and a lifting drive system that drives the lifting column to move relative to the fixed column. The lifting drive system includes a drive motor and a transmission chain drive mechanism. The transmission chain drive mechanism includes a chain and a sprocket. The lifting column is connected to the chain and can move up and down with the chain to achieve lifting. There are several sliders on the lifting column, which are used to connect the pull rope (protective member). The lifting column is connected to the slider at the bottom through a transmission belt. When the lifting column rises, under the action of the transmission belt, the slider at the bottom moves upward, pushing the slider above it to move upward, so that the pull rope as a whole rises relative to the lifting column, thereby opening the passage for passengers to get on and off the train, which is suitable for high-speed rail platforms. When the lifting column descends, under the action of gravity, each slider can also move downward relative to the lifting column, lowering the pull rope to a lower position, thereby isolating the passengers.

[0004] The platform is an open outdoor environment. In order to ensure the structural strength of the lifting column, the lifting column is generally made of steel plate. Its own weight is heavy, and the tension of the pull rope will also act on the lifting column through the slider. Therefore, the resistance when driving the lifting column to rise is relatively large. At the same time, the pull rope needs to rise to a certain height (to meet the needs of passengers passing through, generally above 1.8m), and the lifting column must also have a sufficient rising stroke (generally above 0.8m). Therefore, the energy consumption when driving the lifting column to rise is relatively high. In order to achieve energy-saving effects, the above-mentioned platform screen door structure for high-speed railway platforms is also equipped with a balance block on the transmission chain drive mechanism.

[0005] However, in actual engineering applications, since the resistance of the lifting column is large when it rises, if the balance block is set too small (light weight), it is difficult to play a balancing role. If you want to achieve the expected balancing effect, the balance block needs to have a large weight, and correspondingly, the volume of the balance block is also large, that is, the balance block must have a certain length (height). The stroke of the balance block during operation is equal to the stroke of the lifting column. In the case that the balance block itself is long, its own length plus the working stroke is not conducive to controlling the height of the highest point when the fixed column and the lifting column are raised. There is an extremely high-voltage contact power grid above the platform. If the height is too high, the risk of contact discharge is also high, which will bring huge safety hazards. At the same time, when there are many lifting devices arranged on the platform, if the height of the lifting device is too high, it will also block the sight of the staff and bring new safety hazards. In addition, during the rising process of the lifting column, the balance block descends. At the moment when the lifting column stops at the highest point, due to the balance block and the lifting column still have a certain speed, plus the weight of the balance block and the lifting column, the instantaneous momentum is large, which will cause serious impact. Similarly, during the process of the lifting column descending, the balance block rises. When the lifting column descends to the lowest point and stops, the balance block and the lifting column still have a certain speed. In addition to the weight of the balance block and the lifting column, the instantaneous momentum is also large, which will also cause serious impact. Since the weight of the lifting column and the balance block is fixed, in order to improve the impact phenomenon, the movement speed of the lifting column must be strictly limited, which will cause the screen door to take longer to open, affecting passengers getting on and off the bus. Utility Model Content

[0006] The purpose of the utility model is to provide a lifting device to solve the technical problems of excessive height and slow lifting speed caused by the balance block in the platform lifting protection system in the prior art. The purpose of the utility model is also to provide a platform lifting protection system to solve the same technical problem.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the lifting device provided by the utility model is:

[0008] A lifting device comprises a fixed column, a lifting column and a lifting drive mechanism, the lifting drive mechanism comprises a driving wheel and a driven wheel and an annular traction member wound around the driving wheel and the driven wheel, the lifting device also comprises a spring balancing mechanism, the spring balancing mechanism comprises a spring coiler, a tower wheel and a pull rope, the spring coiler comprises a shell, a coil spring and a coil spring shaft, two ends of the coil spring are respectively connected to the shell and the coil spring shaft, the shell is fixed to the fixed column or other foundation fixed relative to the fixed column, the coil spring shaft is rotatable, the tower wheel and the coil spring shaft are connected to prevent rotation, one end of the pull rope is fixed to the tower wheel, and the other end is fixed to the wheel shaft of the driving wheel or the driven wheel, or the other end is fixed to the rope pulley connected to the wheel shaft of the driving wheel or the driven wheel.

[0009] As a further improvement, the spring winder is arranged below the wheel axle or rope pulley.

[0010] As a further improvement, the lifting drive mechanism is arranged on one side of the left and right sides of the fixed column.

[0011] As a further improvement, the spring balancing mechanism is arranged on a side of the lifting drive mechanism that is away from the fixed column.

[0012] The beneficial effect of the utility model is that the utility model belongs to an improved utility model creation. Under the action of the lifting drive mechanism, the lifting column can be lifted up and down relative to the fixed column. By adding a spring balancing mechanism, the constant torque loading is realized by utilizing the cooperation of the coil spring and the tower wheel, and the torque is applied to the lifting drive mechanism through the pull rope to balance the resistance torque of the driving wheel and the driven wheel when the lifting column is lifted, thereby achieving a balancing effect consistent with the counterweight block. Compared with the counterweight block solution in the prior art, the spring balancing mechanism in the utility model is smaller in size, and there is no moving part that is opposite to the movement direction of the lifting column, and it will not cause the momentum to increase during the movement process. Therefore, the demand for the installation space of the lifting device is reduced, and the height of the lifting device can be reduced. At the same time, the spring balancing mechanism can play a balancing role at any time, reducing the instantaneous impact of the lifting column rising and falling, and it is also convenient to increase the movement speed of the lifting column.

[0013] In order to achieve the above-mentioned purpose, the technical solution of the platform lifting protection system provided by the utility model is:

[0014] A platform lifting protection system includes a lifting device that is arranged on the platform at intervals. The lifting drive mechanism includes a driving wheel and a driven wheel and an annular traction member wound around the driving wheel and the driven wheel. The lifting device also includes a spring balancing mechanism. The spring balancing mechanism includes a spring winder, a tower wheel and a pull rope. The spring winder includes a shell, a coil spring and a coil spring shaft. Two ends of the coil spring are respectively connected to the shell and the coil spring shaft. The shell is fixed to a fixed column or other foundation fixed relative to the fixed column. The coil spring shaft is rotatable. The tower wheel and the coil spring shaft are connected to prevent rotation. One end of the pull rope is fixed to the tower wheel, and the other end is fixed to the wheel axle of the driving wheel or the driven wheel, or the other end is fixed to a rope pulley connected to the wheel axle of the driving wheel or the driven wheel.

[0015] As a further improvement, the spring winder is arranged below the wheel axle or rope pulley.

[0016] As a further improvement, the lifting drive mechanism is arranged on one side of the left and right sides of the fixed column.

[0017] As a further improvement, the spring balancing mechanism is arranged on a side of the lifting drive mechanism that is away from the fixed column.

[0018] The beneficial effect of the utility model is that the utility model belongs to an improved utility model creation. Under the action of the lifting drive mechanism, the lifting column can be lifted up and down relative to the fixed column. By adding a spring balancing mechanism, the constant torque loading is realized by utilizing the cooperation of the coil spring and the tower wheel, and the torque is applied to the lifting drive mechanism through the pull rope to balance the resistance torque of the driving wheel and the driven wheel when the lifting column is lifted, thereby achieving a balancing effect consistent with the counterweight block. Compared with the counterweight block solution in the prior art, the spring balancing mechanism in the utility model is smaller in size, and there is no moving part that is opposite to the movement direction of the lifting column, and it will not cause the momentum to increase during the movement process. Therefore, the demand for the installation space of the lifting device is reduced, and the height of the lifting device can be reduced. At the same time, the spring balancing mechanism can play a balancing role at any time, reducing the instantaneous impact of the lifting column rising and falling, and it is also convenient to increase the movement speed of the lifting column. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of an embodiment of the lifting device (elevating column omitted) in the utility model;

[0020] Figure 2 It is a structural schematic diagram of the platform lifting protection system in the utility model.

[0021] Description of reference numerals:

[0022] 11. Motor; 12. Reducer; 13. Coupling; 141. Driving sprocket; 142. Driven sprocket; 143. Transmission chain; 211. Housing; 212. Winding spring shaft; 22. Tower pulley; 23. Pull rope; 24. Rope pulley; 100. Fixed column; 200. Lifting column; 300. Protective rope. DETAILED DESCRIPTION

[0023] Unlike subway platforms, the specifications and stop locations of high-speed trains or ordinary trains of different numbers are not completely consistent, and it is impossible to set up opening and closing doors like subway platforms. Therefore, a lifting protection system with a larger span is a better choice. Figure 2 As shown, the platform lifting protection system includes a plurality of lifting devices arranged at intervals along the length of the platform, and a protective member such as a protective rope 300 or a protective belt is connected between two adjacent lifting devices to play a protective isolation role. The lifting device includes a fixed column 100 and a lifting column 200. The fixed column 100 is provided with a lifting drive mechanism for driving the lifting column 200 to move up and down. The lifting column 200 is provided with a plurality of sliders (not shown in the figure). The sliders are used to connect the protective rope 300. When the lifting column 200 rises or falls, the sliders rise or fall synchronously, thereby driving the protective rope 300 to rise (open the door) and fall (close the door), thereby playing an isolation and protection effect.

[0024] It can be seen from the analysis that when the lifting column 200 rises, it not only has to overcome the gravity of the lifting column 200 itself and the related accessories installed on the lifting column 200, but also needs to overcome the friction between the lifting column 200 and the fixed column 100 (the tension of the protective ropes 300 on both sides acts on the lifting column 200, which will increase the friction between the lifting column 200 and the fixed column 100). That is, the resistance when the lifting column 200 rises is relatively large. Therefore, the solution of using a counterweight to balance the gravity of the lifting column 200 began to appear. Although the use of a counterweight can balance the resistance when the lifting column 200 rises, as described in the background technology, the solution of using a counterweight has the problem of difficulty in controlling the height of the lifting device and increasing the lifting speed.

[0025] In order to solve the above problems, the basic technical concept of the utility model is to set up a spring balancing mechanism including a tower-shaped tower wheel, a spring coiler, and a pull rope, and the tower wheel and the rotatable spring shaft in the spring coiler are connected to each other by a rotation-proof connection, one end of the pull rope is fixed to the tower wheel and the other wheel axle of the driving wheel and the driven wheel or fixed to a rope wheel that is rotation-proof and installed on the axle, and the other end of the pull rope is fixed to the tower wheel. In this way, by matching the rotation angle of the coil spring in the spring coiler and the radius change relationship of the tower wheel, the constant torque loading of the spring balancing mechanism can be achieved, and the resistance torque when the lifting column rises can be balanced.

[0026] The present invention is further described in detail below in conjunction with the embodiments.

[0027] The specific embodiment of the lifting device provided by the utility model:

[0028] like Figure 1 and Figure 2 As shown, the lifting device in this embodiment also includes a fixed column 100, a lifting column 200 and a lifting drive mechanism for driving the lifting column 200 to move up and down. The lifting process of the lifting column 200 can be consistent with the prior art. The following mainly introduces the improved points of the utility model in detail.

[0029] like Figure 1As shown, the lifting drive mechanism is arranged on the fixed column 100, and mainly includes a motor 11, a reducer 12, a coupling 13, a driving sprocket 141, a driven sprocket 142, and a transmission chain 143 (annular traction member). The power output by the motor 11 is transmitted to the driving sprocket 141 through the coupling 13 after being decelerated and torque-increased by the reducer 12. The driving sprocket 141 and the driven sprocket 142 are both rotatably mounted on the fixed column 100. The transmission chain 143 is annular as a whole, winding around the driving sprocket 141 and the driven sprocket 142. The driving sprocket 141 and the driven sprocket 142 are both fixed-axis rotating. Therefore, when the driving sprocket 141 rotates, the annular transmission chain 143 can move synchronously and play a traction role. A driving seat (not shown in the figure) for connecting the lifting column 200 is also provided on the transmission chain 143. The lifting column 200 can be connected to the driving seat and rise and fall with the movement of the transmission chain 143. Therefore, by balancing the torques of the driving sprocket 141 and the driven sprocket 142 , the resistance of the lifting column 200 when it rises can be balanced.

[0030] In other embodiments, belt drive can also be selected as the transmission form of the lifting drive mechanism. It is not difficult to understand that the belt drive form is equivalent to replacing the driving sprocket 141 with a driving pulley, the driven sprocket 142 with a driven pulley, and the transmission chain 143 with a transmission belt, such as an annular synchronous belt, etc., which can also realize the up and down lifting drive of the lifting column 200. In other embodiments, wire rope drive can also be used as the transmission form of the lifting drive mechanism, and the corresponding driving wheel is a driving rope wheel, the driven wheel is a driven rope wheel, and the annular traction member is a wire rope.

[0031] The lifting device in this embodiment also includes a spring balancing mechanism acting on the lifting drive mechanism, such as Figure 1As shown, the spring balance mechanism includes a spring coiler, a tower wheel 22 and a pull rope 23, the spring coiler includes a coil spring shaft 212, a housing 211 and a coil spring (not shown in the figure), the housing 211 has a cavity inside, the coil spring shaft 212 is sleeved in the housing 211, and the annular space between the coil spring shaft 212 and the housing 211 forms a storage space for placing the coil spring, one end of the coil spring is fixed on the housing 211, and the other end is fixed on the coil spring shaft 212. The housing 211 is fixed, the coil spring shaft 212 can rotate relative to the housing 211, and the tower wheel 22 is connected to the coil spring shaft 212 (specifically, it can be connected by a spline or a coupling). In addition, in this embodiment, a rope wheel 24 is also configured, and the rope wheel 24 is connected to the wheel shaft of the driving sprocket 141. One end of the pull rope 23 is fixed on the tower wheel 22 (the outer periphery of the tower wheel 22 is provided with a spiral rope groove), and the other end is fixed on the rope wheel 24 (having a part wound on the rope wheel). The spring coiler can use the coil spring to store energy. The torque of the coil spring can be output through the coil spring shaft 212, and act on the rope pulley 24 through the tower wheel 22 and the pull rope 23, and finally act on the driving sprocket 141 through the rope pulley 24. The torque of the tower wheel 22 is equal to the tension of the pull rope 23 multiplied by the radius of the action point of the pull rope 23 (tower wheel 22). Therefore, by matching the radius of the tower wheel 22 and the rotation angle change relationship of the coil spring, the tension of the pull rope 23 can be guaranteed to be constant, that is, the torque of the rope pulley 24 is constant, and the torque of the rope pulley 24 can match the resistance torque when the lifting column 200 rises, thereby achieving a balancing effect. It should be noted that the torque of the rope pulley 24 is not necessarily completely equal to the resistance torque when the lifting column 200 rises (complete balance), and it can be slightly less than the resistance torque when the lifting column 200 rises (partial balance).

[0032] Compared with the prior art, this embodiment does not need to set a counterweight block while balancing the resistance of the lifting column 200, and only needs to select a matching coil spring and tower wheel 22. It can be understood by those skilled in the art that the size of the counterweight block that can balance the resistance of the lifting column 200 is actually close to that of the lifting column 200, while the size of the coil spring and the tower wheel 22 is much smaller than the counterweight block, so the height size of the lifting device can be better controlled, which is safer when actually used on the platform. In addition, this spring balancing mechanism can play a balancing role at any time, and will not add more moving parts. Therefore, at the moment when the lifting column 200 rises and falls, it will not produce excessive impact, and the lifting speed of the lifting column 200 can be increased to facilitate passengers to get on and off quickly.

[0033] Specifically, Figure 1As shown, in this embodiment, the spring coiler is arranged below the rope wheel 24, and the housing 211 can be directly fixed on the fixed column 100, or fixed on the ground or other connection objects fixed on the fixed column 100, and can be selectively arranged according to the actual space, and it is relatively fixed relative to the fixed column 100. The spring coiler is arranged below the rope wheel 24 in this way to facilitate the fixing of the spring coiler. At the same time, the spring coiler is larger in size (compared with the rope wheel 24), which is also convenient for utilizing the lower space. In other embodiments, the spring coiler can also be fixed above the tower wheel 22, and the rope wheel 24 can also be connected to the wheel shaft of the driven sprocket to prevent rotation.

[0034] As a feasible alternative embodiment, the rope wheel 24 can also be omitted. Figure 1 For example, if the axle of the driving sprocket 141 protrudes from the driving sprocket 141 for a long time, one end of the pull rope 23 can also be directly fixed to the protruding portion of the axle.

[0035] In addition, if Figure 1 As shown, the lifting drive mechanism of this embodiment is arranged on one of the left and right sides of the fixed column 100. The left and right sides mentioned here are relative to the direction of passengers getting on and off the train (front and back direction). In this way, the width of the lifting device in the left and right direction can be utilized to avoid being too wide in the front and back direction, and the lifting device can reduce the space occupied by the front and back direction of the platform (passengers getting on and off the train), thereby reserving more space for passengers. Of course, in other embodiments, the driving sprocket 141 and the driven sprocket 142 can also be arranged in the center, such as disclosed in patent document CN116464383A.

[0036] On the basis that the lifting drive mechanism is arranged on one side of the left and right sides of the fixed column 100, the spring balancing mechanism is arranged on the side of the lifting drive mechanism away from the fixed column 100. In this way, the lifting drive mechanism can be installed and debugged first, and then the spring balancing mechanism can be installed. Of course, in other embodiments, the spring balancing mechanism can also be arranged on the side of the lifting drive mechanism close to the fixed column 100.

[0037] Specific embodiments of the platform lifting protection system in the utility model:

[0038] The platform lifting protection system includes a plurality of lifting devices that are arranged at intervals on the platform. The lifting devices have the same structure as that described in the above lifting device embodiments and will not be described in detail here.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lifting device, comprising a fixed column, a lifting column and a lifting drive mechanism, wherein the lifting drive mechanism comprises a driving wheel and a driven wheel and an annular traction member wound around the driving wheel and the driven wheel, characterized in that: The lifting device also includes a spring balancing mechanism, which includes a spring coiler, a tower wheel and a pull rope. The spring coiler includes a shell, a coil spring and a coil spring shaft. The two ends of the coil spring are respectively connected to the shell and the coil spring shaft. The shell is fixed on a fixed column or on a basis fixed relative to the fixed column. The coil spring shaft is rotatable, the tower wheel and the coil spring shaft are connected to prevent rotation. One end of the pull rope is fixed to the tower wheel, and the other end is fixed to the axle of the driving wheel or the driven wheel, or the other end is fixed to a rope pulley connected to the axle of the driving wheel or the driven wheel to prevent rotation.

2. The lifting device according to claim 1, characterized in that: The spring winder is arranged below the wheel shaft or the rope pulley.

3. The lifting device according to claim 1 or 2, characterized in that: The lifting drive mechanism is arranged on one of the left and right sides of the fixed column.

4. The lifting device according to claim 3, characterized in that: The spring balancing mechanism is arranged on a side of the lifting drive mechanism which is away from the fixed column.

5. A platform lifting protection system, comprising a lifting device arranged at intervals on the platform, the lifting drive mechanism comprising a driving wheel and a driven wheel and an annular traction member wound around the driving wheel and the driven wheel, characterized in that: The lifting device also includes a spring balancing mechanism, which includes a spring coiler, a tower wheel and a pull rope. The spring coiler includes a shell, a coil spring and a coil spring shaft. The two ends of the coil spring are respectively connected to the shell and the coil spring shaft. The shell is fixed on a fixed column or on a basis fixed relative to the fixed column. The coil spring shaft is rotatable, the tower wheel and the coil spring shaft are connected to prevent rotation. One end of the pull rope is fixed to the tower wheel, and the other end is fixed to the axle of the driving wheel or the driven wheel, or the other end is fixed to a rope pulley connected to the axle of the driving wheel or the driven wheel to prevent rotation.

6. The platform lifting protection system according to claim 5, characterized in that: The spring winder is arranged below the wheel shaft or the rope pulley.

7. The platform lifting protection system according to claim 5 or 6, characterized in that: The lifting drive mechanism is arranged on one of the left and right sides of the fixed column.

8. The platform lifting protection system according to claim 7, characterized in that: The spring balancing mechanism is arranged on a side of the lifting drive mechanism which is away from the fixed column.

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