Elevator car system

Abstract

The invention discloses a lift car system which comprises a lift car, a lift car frame and a vibration isolation piece and further comprises a damper. The vibration isolation piece is arranged between the lift car and the lift car frame, the damper is arranged between the lift car and the lift car frame, and damping of the damper can be adjusted; when the car door is in an open state, the damping force of the damper is controlled to be maximum, so that the compressed amount of the vibration isolation piece is smaller than a threshold value after a load enters the car, and the vibration isolation piece does not generate the vibration isolation effect; and when the car door is in a closed state, the damping force of the damper is controlled to be minimum, so that the vibration isolation piece generates a vibration isolation effect. By arranging the dampers with adjustable damping, the stability of the lift car is guaranteed when large-tonnage goods enter and exit from the lift car, and meanwhile the good vibration isolation effect is achieved in the running process of the lift car.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to an elevator car system. Background Art

[0002] At present, elevator companies use rubber vibration reduction on the bottom of passenger elevators to reduce vibration. However, freight elevators are limited by the large load of the car and are used for cargo, so no vibration isolation measures are used for the car. If similar vibration isolation measures are used as for passenger elevators, the support performance will be insufficient. If measures with sufficient support are used, the vibration isolation rate will be low.

[0003] With the development of modern architecture, freight elevators are often used for both passenger and freight transportation and for industrial purposes. This puts forward new requirements for the support of the car bottom. It must have sufficient rigidity to support large tonnage loads and sufficient vibration reduction effect. This is the technical problem currently faced. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a car system, comprising a car, a car frame and a vibration isolator, the car system also comprising a damper;

[0005] The vibration isolator is arranged between the car and the car frame, the damper is arranged between the car and the car frame, and the damping of the damper is adjustable;

[0006] When the car door is in an open state, the damping force of the damper is controlled to be maximum, so that the compression amount of the vibration isolator is less than a threshold value after the load enters the car, and the vibration isolator does not produce a vibration isolation effect;

[0007] When the car door is in a closed state, the damping force of the damper is controlled to be minimum, so that the vibration isolation member produces a vibration isolation effect.

[0008] Preferably, the damper is a magnetorheological fluid damper.

[0009] Preferably, the damper is a motor screw transmission device.

[0010] Preferably, the car system also includes a car load detection device for detecting the mass of the load in the car; the stiffness K of the vibration isolation member is variable; when the mass of the load in the car is less than a preset load threshold, the stiffness K≤λm, wherein λ is a constant calculated by the vibration isolation efficiency, and m is the total mass of the car and the load in the car; when the mass of the load in the car is not less than a preset load threshold, the stiffness K≥σm, wherein σ is a constant calculated by the car displacement limit.

[0011] The present invention also provides a car system, comprising a car, an image recognition device, a car frame and a vibration isolation member, wherein the car system further comprises a damper;

[0012] The vibration isolator is arranged between the car and the car frame, the damper is arranged between the car and the car frame, and the damping of the damper is adjustable; the image recognition device is used to identify the type of load that will enter the car;

[0013] When the car door is in a closed state, the damping force of the damper is controlled to be minimum so that the vibration isolation member produces a vibration isolation effect;

[0014] When the car door is in an open state and the image recognition device identifies that the type of load to enter the car is a large object or an object carried by a vehicle, the damping force of the damper is controlled to be maximum, so that the compression amount of the vibration isolation member after the load enters the car is less than the threshold value, and the vibration isolation member does not produce a vibration isolation effect.

[0015] Compared with the prior art, the present invention ensures the stability of the car when large-tonnage cargo enters and exits the car by arranging a damper with adjustable damping, and at the same time has a good vibration isolation effect during the operation of the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0017] Figure 1 This is a schematic diagram of the structure of the elevator car system of Example 1;

[0018] Figure 2 This is a schematic diagram of the structure of the elevator car system of Example 2. DETAILED DESCRIPTION

[0019] The following describes the implementation methods of the present invention through specific specific embodiments, and those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific implementation methods, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the overall design concept of the invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other in the absence of conflict. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art.

[0020] Example 1

[0021] like Figure 1 As shown, this embodiment provides a car system, including a car 1, a car frame 4, a damper 2 and a vibration isolation member 3.

[0022] The vibration isolator 3 is arranged between the car and the car frame, for example, a rubber vibration isolator.

[0023] The damper 2 is arranged between the car and the car frame, and the damping of the damper is adjustable; preferably, the damper is a magnetorheological fluid damper.

[0024] When the car door is in an open state, the damping force of the damper is controlled to the maximum so that the supporting force generated by the damper can bear the weight of the car and its load. After the load enters the car, the compression amount of the vibration isolator is less than the threshold value, and the vibration isolator hardly bears the weight of the car and its load, and the vibration isolator does not produce a vibration isolation effect. At this time, if a large mass of cargo enters the car, there is no relative displacement between the car 1 and the car frame 4, or the displacement is very small. The shaking and deflection of the car will not be caused by the smaller stiffness of the vibration isolator 3.

[0025] When the car door is in a closed state, the damping force of the damper 2 is controlled to be minimum, so that the vibration isolator 3 bears most of the weight of the car and its load, and the vibration isolator produces a vibration isolation effect when the elevator is running. Preferably, when the car door is closed, the damping force is gradually reduced from the maximum to the minimum to avoid impact caused by the load. The minimum damping force can be zero, or a smaller supporting force can be maintained.

[0026] Example 2

[0027] like Figure 2 As shown, the difference between this embodiment and embodiment 1 is that the damper 2 is a motor screw transmission device. When the motor realizes the rise or fall of the screw or nut through the worm gear transmission. The way to change the damping force can be a hard contact, the damping is maximum when the screw or nut is in contact with the car, and the damping is zero when there is no contact. The way to change the damping force can be an elastic contact, for example, a damping member related to the compression amount is set, and the compression amount of the damping member is changed by the rise or fall of the screw or nut.

[0028] Example 3

[0029] The difference between this embodiment and the first or second embodiment is that the car system of this embodiment further includes an image recognition device, and the image recognition device is used to recognize the type of the load that will enter the car.

[0030] The load category can be classified according to the volume of the object or the handling condition of the object. For example, an object whose estimated volume is greater than a preset value is defined as a large-volume object. Another example is that an object that is carried by a vehicle, a forklift or a cart is defined as an object carried by a vehicle.

[0031] When the car door is in an open state, and the image recognition device recognizes that the type of load that will enter the car is a large-volume object or an object carried by a vehicle, the damping force of the damper is controlled to be maximum, so that the compression amount of the vibration isolator after the load enters the car is less than the threshold value, and the vibration isolator does not produce a vibration isolation effect. When the car door is in a closed state, the damping force of the damper is controlled to be minimum, so that the vibration isolator produces a vibration isolation effect.

[0032] Example 4

[0033] In this embodiment, based on the above-mentioned embodiment, the car system further comprises a car load detection device for detecting the mass of the load in the car;

[0034] The stiffness K of the vibration isolation component is variable; when the mass of the load in the car is less than the preset load threshold, the stiffness K is made ≤ λm, where λ is a constant calculated by the vibration isolation efficiency, and m is the total mass of the car and the load in the car; when the car is running, high-frequency vibrations are attenuated to improve the comfort of the car.

[0035] When the mass of the load in the car is not less than a preset load threshold, the stiffness K≥σm, where σ is a constant calculated by limiting the displacement of the car; when the car is running, the displacement of the car can be limited.

[0036] The present invention has been described in detail above through specific implementation modes and embodiments, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may also make many variations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. A car system, comprising a car, a car frame and a vibration isolator, characterized in that: The car system also includes a damper; The vibration isolator is arranged between the car and the car frame, the damper is arranged between the car and the car frame, and the damping of the damper is adjustable; When the car door is in an open state, the damping force of the damper is controlled to be maximum, so that the compression amount of the vibration isolator is less than a threshold value after the load enters the car, and the vibration isolator does not produce a vibration isolation effect; When the car door is in a closed state, the damping force of the damper is controlled to be minimum, so that the vibration isolation member produces a vibration isolation effect.

2. The car system according to claim 1, characterized in that: The damper is a magnetorheological fluid damper.

3. The car system according to claim 1, characterized in that: The damper is a motor screw transmission device.

4. The car system according to claim 1, characterized in that: The car system also includes a car load detection device for detecting the mass of the load in the car; The stiffness K of the vibration isolation component is variable; when the mass of the load in the car is less than a preset load threshold, the stiffness K≤λm, where λ is a constant calculated by the vibration isolation efficiency, and m is the total mass of the car and the load in the car; when the mass of the load in the car is not less than a preset load threshold, the stiffness K≥σm, where σ is a constant calculated by the car displacement limit.

5. A car system, comprising a car, an image recognition device, a car frame and a vibration isolation member, characterized in that: The car system also includes a damper; The vibration isolator is arranged between the car and the car frame, the damper is arranged between the car and the car frame, and the damping of the damper is adjustable; the image recognition device is used to identify the type of load that will enter the car; When the car door is in a closed state, the damping force of the damper is controlled to be minimum so that the vibration isolation member produces a vibration isolation effect; When the car door is in an open state and the image recognition device identifies that the type of load to enter the car is a large object or an object carried by a vehicle, the damping force of the damper is controlled to be maximum, so that the compression amount of the vibration isolation member after the load enters the car is less than the threshold value, and the vibration isolation member does not produce a vibration isolation effect.

6. The car system according to claim 5, characterized in that: The damper is a magnetorheological fluid damper.

7. The car system according to claim 5, characterized in that: The damper is a motor screw transmission device.

8. The car system according to claim 5, characterized in that: The car system also includes a car load detection device for detecting the mass of the load in the car; The stiffness K of the vibration isolation component is variable; when the mass of the load in the car is less than a preset load threshold, the stiffness K≤λm, where λ is a constant calculated by the vibration isolation efficiency, and m is the total mass of the car and the load in the car; when the mass of the load in the car is not less than a preset load threshold, the stiffness K≥σm, where σ is a constant calculated by the car displacement limit.

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