Elevator car floor vibration-damping device and elevator

Abstract

The invention discloses an elevator car floor vibration-damping device and an elevator, the elevator car floor vibration-damping device comprises a plurality of vibration-damping components, and each vibration-damping component includes a lower bearing plate, an upper bearing plate, a plurality of springs connected between the upper bearing and the lower bearing plate, support posts that run through the upper bearing plate and the lower bearing plate and that each have an upper end fixedly connected with the upper bearing plate and a lower end positioned below the lower bearing plate, and rubber blocks sleeving the lower ends of the support posts and pressing between the lower surface of the lower bearing plate and the lower ends of the support posts. By using the elevator car floor vibration-damping device on the elevator, it is possible to provide high static compression capacity, low inherent frequency and good low-frequency vibration-isolating performance for the elevator, and a rider can feel vibration damping being similar to energy-absorbing vibration damping; the elevator car floor vibration-damping device is suitable for vibration isolation for an elevator; in the case that the elevator experiences weightlessness (i.e., the elevator runs downward), for vibration damping when a car rebounds up occasionally due to various impact loads, the rubber blocks are arranged on the lower surface of the lower bearing plate, rubber is under pressure during rebounding, and reliable vibration damping is provided.

Description

technical field [0001] The invention relates to the field of elevators, in particular to an elevator car bottom vibration damping device and an elevator. Background technique [0002] The vibration problem of the elevator system has always been a technical problem in the elevator manufacturing industry. Isolating or absorbing vibration energy and improving the ride comfort of the car have always been the direction of technological improvement. Elevator manufacturers of all brands are committed to the design of the vibration-damping structure of the car system. The vibration mainly comes from the traction machine, which is transmitted to the car frame system through the wire rope. At the same time, the guide shoes fixed on the car frame and running along the guide rails will also generate vibrations, and these vibrations will eventually be transmitted to the car connected to the car frame. The elevator runs up and down in the shaft, and the car is often in an overweight or ...

AI Technical Summary

Problems solved by technology

In the prior art, the vibration reduction of the bottom of the elevator car is directly installed between the car and the car bottom by rubber blocks. There are the following problems: 1. The rubber shock absorber has poor resistance to high and low temperature. The upper limit of the general use temperature is 70°C, and the lower limit is 0°C. In the alpine region, the rubber shock absorber will fail, causing many problems

Its oil resistance is poor, and it is easy to age in the air, especially it will accelerate aging under direct sunlight. The general life is about 6 to 8 years; The cost of standard small batch production is extremely high; 3. The dynamic stiffness, static stiffness and hardness of rubber materials are mainly guaranteed by the manufacturing process. not constant

For a larger damping area, when the number of designed rubber increases, the damping effect will be unbalanced; 4. In addition, it will experience relaxation or permanent deformation under the action of long-term heavy loads and extreme cold weather, and its stiffness is not constant. The inconstant stiffness will affect the inaccurate measurement of the sensor of the weighing device at the car bottom, resulting in inaccurate weighing of the car, and the car cannot alarm when it is overweight, which will cause serious safety hazards

[0003] For the previous rubber block vibration reduction design, a large number of elevator test tower tests have shown that the weightlessness of the elevator means that the vibration reduction effect is not good when the elevator is running downwards, especially when the high-speed elevator is descending due to air disturbance and impact, the car will appear upward. Jumping and rebounding phenomenon, at this time, the vibration-absorbing rubber will be temporarily tensioned, and there will be obvious vibration enhancement when measured with a PMT vibrometer

That is to say, the current rubber damping effect is not good when the elevator is running downwards.

[0004] At present, there are also elevators that use spring vibration reduction, such as the publication numbers CN201660344U and CN204878518U, both of which are located at the bottom of the car with 2 to 4 springs with larger specifications for vibration reduction. Due to the larger spring specifications, it cannot absorb vibration energy. effect, the comfort of passengers taking the elevator cannot be guaranteed

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