Rigidity-variable passenger and freight dual-purpose car platform based on electric push rod mechanism

Abstract

The invention discloses a variable-rigidity passenger and freight car platform based on an electric push rod mechanism. The variable-rigidity passenger and freight car platform comprises a car platform upper-layer frame, a car platform lower-layer frame, a damping mechanism, the electric push rod mechanism, a rigid cushion block and a control device. The damping mechanism is arranged between the car bottom upper-layer frame and the car bottom lower-layer frame; the electric push rod mechanism is arranged on the car bottom lower layer frame and used for moving the rigid cushion block. The control device controls the position of the rigid cushion block according to the state of the elevator, and when the elevator is in a cargo carrying state, the rigid cushion block plays a role in supporting the car bottom upper-layer frame; when the elevator is in a passenger carrying state, the damping mechanism plays a role in supporting the car bottom upper-layer frame, and the rigid cushion blocks do not play a role in supporting the car bottom upper-layer frame.

Description

TECHNICAL FIELD

[0001] The present application relates to the elevator technical field, specifically to a variable stiffness passenger and freight dual-purpose car bottom based on an electric push rod mechanism. BACKGROUND

[0002] In order to realize the variable stiffness of the passenger and freight dual-purpose car bottom, a variable stiffness passenger and freight dual-purpose car bottom based on a magneto-rheological fluid or oil gas spring, hydraulic damping and other mechanisms is disclosed in Chinese patent document (CN119460965A). The scheme is theoretically feasible, but considering the limitations of civil engineering and car bottom structure, it is difficult to apply in practice, and the scheme cost is high. SUMMARY

[0003] The technical problem to be solved by the present application is how to provide a low-cost variable stiffness passenger and freight dual-purpose car bottom.

[0004] To solve the above technical problems, the present application provides a variable stiffness passenger and freight dual-purpose car bottom based on an electric push rod mechanism, which comprises a car bottom upper frame, a car bottom lower frame, a damping mechanism, an electric push rod mechanism, a rigid pad and a control device.

[0005] The damping mechanism is arranged between the car bottom upper frame and the car bottom lower frame; the electric push rod mechanism is arranged on the car bottom lower frame and is used to move the rigid pad.

[0006] The control device controls the position of the rigid pad according to the state of the elevator. When the elevator is in a freight carrying state, the rigid pad supports the car bottom upper frame; when the elevator is in a passenger carrying state, the damping mechanism supports the car bottom upper frame, and the rigid pad does not support the car bottom upper frame.

[0007] Preferably, the damping mechanism is damping rubber.

[0008] Preferably, the car bottom lower frame has a connecting piece, the upper surface of the connecting piece is provided with a guide rail, the upper surface of the guide rail is kept horizontal with the upper surface of the car bottom lower frame; the electric push rod mechanism is arranged at one end of the guide rail; the head of the telescopic rod of the electric push rod mechanism is connected with the rigid pad, and the telescopic rod is used to move the rigid pad along the guide rail.

[0009] Preferably, guide plates are arranged on both sides of the guide rail to guide and limit the rigid pad.

[0010] Preferably, an auxiliary pad assembly is fixed to the support part of the rigid pad on the car bottom lower frame.

[0011] Preferably, the overall thickness of the auxiliary pad assembly is adjustable. BRIEF DESCRIPTION OF DRAWINGS

[0012] The application will be described in further detail below with reference to the drawings and specific embodiments:

[0013] Figure 1 Figure 1 is a partial schematic view of a variable stiffness passenger and freight elevator car floor structure based on an electric push rod mechanism according to an embodiment of the application. DETAILED DESCRIPTION

[0014] The application will be described in further detail below with reference to the drawings and specific embodiments:

[0015] Embodiment 1

[0016] As shown in Figure 1, the embodiment provides a variable stiffness passenger and freight elevator car floor based on an electric push rod mechanism, which includes a car floor upper frame 1, a car floor lower frame 2, a damping mechanism 3, an electric push rod mechanism 4, rigid pads 5, and a control device (not shown in the figure). Figure 1 The upper car floor plate provided on the car floor upper frame 1 is removed to show the internal mechanism. In order to clearly show the components, Figure 1 Figure 2 is a partial view of a passenger and freight elevator car floor, showing only one corner of the car floor, and the structures of the other three corners are basically the same. Figure 1

[0017] In this embodiment, the damping mechanism 3 is damping rubber, and four pieces of damping rubber 3 are respectively provided at the four corners between the car floor upper frame 1 and the car floor lower frame 2. The damping rubber 3 can play a role of vibration isolation and noise reduction for the car floor upper frame 1.

[0018] The electric push rod mechanism 4 is provided on the car floor lower frame and is used to move the rigid pads 5; the control device controls the position of the rigid pads 5 according to the state of the elevator, when the elevator is in a freight carrying state, the rigid pads 5 play a supporting role for the car floor upper frame 1; when the elevator is in a passenger carrying state, the damping mechanism 3 plays a supporting role for the car floor upper frame 1, and the rigid pads 5 do not play a supporting role for the car floor upper frame.

[0019] ​More specifically, the lower layer frame 2 of the car bottom is provided with two connection members 7 in front and back, and each connection member 7 is provided with a precision guide rail 6 on the upper surface, and each side of the precision guide rail 6 is provided with an electric push rod mechanism 4, and the head of the telescopic rod of the electric push rod mechanism 4 is connected with the rigid pad 5, and the telescopic rod is telescoped to move the rigid pad 5 along the guide rail 6.

[0020] The upper surface of the guide rail 6 is kept horizontal with the upper surface of the lower layer frame 2 of the car bottom, and the surface is smooth, so that the movable rigid pad 5 can smoothly transition into the gap between the upper layer frame 1 of the car bottom and the lower layer frame 2 of the car bottom when the electric push rod mechanism 4 is extended. The guide rail 6 is provided with a guide plate 61 on both sides, which plays a guiding and limiting role for the rigid pad 5, preventing the rigid pad 5 from derailing.

[0021] Preferably, the lower layer frame 2 of the car bottom is fixed with an auxiliary pad assembly 51 corresponding to the support part of the rigid pad, which can enhance the rigidity. In addition, the overall thickness of the auxiliary pad assembly 51 can be adjusted, for example, by adding or subtracting shims, to adjust the gap between the upper layer frame 1 of the car bottom and the lower layer frame 2 of the car bottom.

[0022] The control device can be arranged in the elevator car or outside the car, and can also be a mobile device. The operator issues an instruction of the state of the elevator to the control device. When the operator needs the elevator to carry a large amount of goods, the control device is instructed to enter the cargo carrying state, and the control device controls the telescopic rod of the electric push rod mechanism 4 to extend, and the rigid pad 5 is pushed to move along the guide rail 6 and is embedded into the gap between the upper layer frame 1 of the car bottom and the lower layer frame 2 of the car bottom. When the load in the car exceeds a preset threshold, the upper layer frame 1 of the car bottom directly presses on the rigid pad 5, and the load is directly transmitted to the lower layer frame 2 of the car bottom through the rigid pad 5, forming a rigid support structure, which greatly improves the overall rigidity of the car bottom. When the goods arrive at the destination floor and are removed from the elevator car, the operator issues an instruction to the control device to push out the cargo carrying state, and the elevator automatically enters the passenger carrying state, or the elevator weighing device measures that the load in the car is less than the preset threshold for more than a preset time, and issues an instruction to the control device to enter the passenger carrying state. When the control device receives the instruction of the elevator entering the passenger carrying state, the telescopic rod of the electric push rod mechanism 4 is retracted and kept in the retracted state, so that the rigid pad 5 does not contact the lower surface of the upper layer frame 1 of the car bottom, that is, the rigid pad 5 does not support the upper layer frame 1 of the car bottom, and only the damping rubber 3 supports the upper layer frame 1 of the car bottom.

[0023] The electric push rod mechanism 4 can adopt the structure of a motor plus a speed transmission mechanism, or can be replaced by a ball screw, a hydraulic lifting mechanism or other linear motion mechanism. The electric push rod mechanism can be configured with different strokes, loads and travel rates according to the load demand and the specifications of the car bottom, and can be selected with a remote control push rod, which is convenient to operate and more flexible in practical application.

[0024] The embodiment has the following technical effects:

[0025] When the elevator is in a passenger carrying state, the upper and lower car floors are connected by damping rubber, and the electric push rod mechanism is horizontally installed on the connector of the lower frame of the car floor. The car floor does not need to expand additional space, and has the advantages of civil engineering and installation convenience. When in a cargo carrying state, the electric push rod mechanism pushes the rigid pad to embed into the gap between the upper and lower car floors along the guide rail on the connector. When the car floor is under pressure in the cargo carrying state, the car floor can be closely attached to the upper and lower car floors, the overall rigidity of the car floor is increased, and the rigidity change requirement of the passenger and cargo dual-purpose car floor is achieved.

[0026] The application is described in detail through the specific embodiments and examples, but these do not constitute a limitation on the application. Those skilled in the art can also make many modifications and improvements without departing from the principles of the application, and these should also be considered as the protection scope of the application.

Claims

1. A variable stiffness passenger / cargo car floor based on an electric push rod mechanism, characterized in that, It includes the upper frame of the car bottom, the lower frame of the car bottom, the vibration damping mechanism, the electric push rod mechanism, the rigid pad block, and the control device; The vibration damping mechanism is installed between the upper frame and the lower frame of the car bottom; the electric push rod mechanism is installed on the lower frame of the car bottom and is used to move the rigid pad block. The control device controls the position of the rigid pad according to the elevator's status. When the elevator is in cargo mode, the rigid pad supports the upper frame of the car bottom. When the elevator is in passenger mode, the vibration damping mechanism supports the upper frame of the car bottom, and the rigid pad does not support the upper frame of the car bottom.

2. The variable stiffness passenger / cargo car floor based on an electric push rod mechanism according to claim 1, characterized in that, The vibration damping mechanism is made of vibration damping rubber.

3. The variable stiffness passenger / cargo car floor based on an electric push rod mechanism according to claim 1, characterized in that, The lower frame of the car has a connector, and a guide rail is mounted on the upper surface of the connector. The upper surface of the guide rail is horizontal with the upper surface of the lower frame of the car. The electric push rod mechanism is arranged at one end of the guide rail; the head of the telescopic rod of the electric push rod mechanism is connected to the rigid pad, and the rigid pad moves along the guide rail by extending and retracting the telescopic rod.

4. The variable stiffness passenger / cargo car floor based on an electric push rod mechanism according to claim 3, characterized in that, Guide plates are provided on both sides of the guide rail, which serve to guide and limit the rigid pad.

5. The variable stiffness passenger / cargo car floor based on an electric push rod mechanism according to claim 1, characterized in that, The lower frame of the car floor is fixed with an auxiliary pad assembly at the support part corresponding to the rigid pad block.

6. The variable stiffness passenger / cargo car floor based on an electric push rod mechanism according to claim 5, characterized in that, The overall thickness of the auxiliary pad assembly is adjustable.

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