阅读说明：本技术 一种行程可调式悬架和驾驶椅 (Stroke-adjustable suspension and driving chair ) 是由 高锐涛 闫华超 陈勇旭 段洁利 杨洲 于 2020-06-02 设计创作，主要内容包括：本发明涉及一种行程可调式座椅悬架和驾驶椅。该行程可调式座椅悬架包括架体,所述架体包括上悬架、可伸缩悬架和下悬架,所述可伸降悬架设于上悬架和下悬架之间,且与上悬架和下悬架连接；所述可伸缩悬架内设有分别与所述上悬架和下悬架连接的弹性压缩部件和气压可调的气压阻尼器。本发明提供的行程可调式座椅悬架可以实现行程可调,减振效果明显,隔振效果好,低静态刚度,较强的非线性度等优势,克服了传统悬架运动过程中无法根据使用条件调节强度的缺点,将外界传递给人体的振动显著降低,提高了人的驾驶舒适度。(The invention relates to a travel-adjustable seat suspension and a driver seat. The stroke-adjustable seat suspension comprises a frame body, wherein the frame body comprises an upper suspension, a telescopic suspension and a lower suspension, and the telescopic suspension is arranged between the upper suspension and the lower suspension and is connected with the upper suspension and the lower suspension; and an elastic compression part and an air pressure adjustable air pressure damper which are respectively connected with the upper suspension and the lower suspension are arranged in the telescopic suspension. The stroke-adjustable seat suspension provided by the invention has the advantages of stroke adjustability, obvious vibration reduction effect, good vibration isolation effect, low static rigidity, strong nonlinearity and the like, overcomes the defect that the strength cannot be adjusted according to the use conditions in the motion process of the traditional suspension, obviously reduces the vibration transmitted from the outside to the human body, and improves the driving comfort of people.)

1. The stroke-adjustable seat suspension is characterized by comprising a frame body (1), wherein the frame body (1) comprises an upper suspension (101), a telescopic suspension (102) and a lower suspension (103), and the telescopic suspension (102) is arranged between the upper suspension (101) and the lower suspension (103) and is connected with the upper suspension (101) and the lower suspension (103); an elastic compression part (2) and an air pressure adjustable air pressure damper (3) which are respectively connected with the upper suspension (101) and the lower suspension (103) are arranged in the telescopic suspension (102).

2. The travel adjustable seat suspension of claim 1, wherein the retractable suspension (102) is a scissors suspension, the scissors suspension being threadably connected to the upper suspension (101) and fixedly connected to the lower suspension (103).

3. The stroke-adjustable seat suspension according to claim 1, wherein the resilient compression member (2) comprises a spring (201).

4. The stroke-adjustable seat suspension according to claim 3, wherein the elastic compression element (2) further comprises an oil damper (202), the spring (201) is sleeved on the oil damper (202), and the oil damper (202) is connected with the upper suspension (101) and the lower suspension (103) through screws.

5. The adjustable-stroke seat suspension according to claim 1, wherein the pneumatic dampers (3) are 2 air dampers symmetrically arranged on both sides of the elastic compression member (2), and the air dampers are provided with air supplement ports (302).

6. The stroke-adjustable seat suspension according to claim 1, wherein the pneumatic damper (3) is screwed to the upper suspension (101), and the pneumatic damper (3) is fixedly connected to the lower suspension (102).

7. The stroke adjustable seat suspension according to claim 1, wherein the pneumatic damper (3) is further provided with a limiter (301) limiting the movement of the pneumatic damper (3).

8. The adjustable seat suspension of claim 6 wherein the limiter is an angular stop.

9. The travel adjustable seat suspension according to claim 6, wherein the limiter is fixedly connected with a pneumatic damper (3).

10. A driver's seat comprising a seat cushion, wherein a travel adjustable seat suspension as claimed in any one of claims 1 to 9 is provided at the bottom of the seat cushion.

Technical Field

The invention relates to the field of agricultural vehicles, in particular to a damping suspension with adjustable stroke and a driving chair.

Background

When the tractor operates in the field, the working condition is complex and changeable, the vibration with large amplitude mainly generated is close to the natural frequency of human organs, and the health of a driver can be seriously influenced by working in the environment for a long time. In the process of operation of a driver, external vibration mainly comes from two aspects, namely the first vibration comes from excitation of uneven ground, the second vibration comes from vibration generated by an engine, and both the first vibration and the second vibration generate a large amount of low-frequency vibration close to the working frequency of organs of a human body, and the superposition of the external vibration and the working frequency of the organs can cause people to feel uncomfortable, influence driving and even improve the probability of vehicle accidents.

The seat suspension system is used for relieving the vibration transmitted to a human body by the cab, provides a good riding environment for a driver, and has important significance for improving riding comfort. Most of current seat suspension all are nonadjustable damping suspension, and the intensity to the change damping of topography is the same, and to a great extent has reduced the comfort level. The rigidity of the existing driver chair suspension is higher, the natural frequency of a chair suspension system is increased, and the attenuation of vibration caused by low frequency is less, so that the aim of improving the comfort of a driver is not fulfilled. On the other hand, if the rigidity is low, the driver touches the seat to cause a large displacement of the seat. The trade-off between linearity and stiffness is particularly important.

CN2018109560115 discloses a nonlinear seat suspension, which has the characteristics of large rigidity in static state and small rigidity in dynamic state, and can achieve a good vibration damping effect, but the vibration damping stroke of the nonlinear seat suspension is not adjustable.

The pneumatic damper is widely applied to occasions with high precision, such as vehicle vibration reduction and ultra-precision equipment vibration isolation. The air pressure damper has the characteristics of large bearing capacity and low rigidity, has stronger nonlinear rigidity, can realize the optimal damping effect by designing a proper damping hole between the main air chamber and the auxiliary air chamber, and further reduces the rigidity of the air spring by the bypass air chamber. But also has certain disadvantages that the air tightness of materials and connection modes needs to be strictly controlled. The driving chair used in the current market is particularly applied to driving chairs of wheel tractors, forklifts and the like, a driver needs to work while driving, and the function requirement of the driving chair is high, but most of the prior driving chairs have simple structures and single functions, and the functions which are very important for the driver, such as auxiliary driving function, driving comfort and the like, cannot be embodied. Meanwhile, the semi-automatic and active damping suspension is high in manufacturing cost, high in precision and difficult to machine.

Therefore, the vibration damping suspension with scientific design structure and proper vibration damping stroke is particularly important, and the method has great help for improving the subjective comfort of drivers.

Disclosure of Invention

The invention aims to overcome the defects and shortcomings of fixed damping effect, uncontrollable stroke, high cost and high energy consumption of the conventional seat suspension and provides a stroke-adjustable seat suspension. The stroke-adjustable seat suspension provided by the invention has the advantages of obvious vibration reduction effect, good vibration isolation effect, low static rigidity and the like, overcomes the defects of over-strong or over-weak resilience and uncontrollable phenomenon in the motion process of the traditional suspension, has better comfort level and is simple in design.

Another object of the present invention is to provide a driving chair.

In order to achieve the purpose of the invention, the invention adopts the following technical scheme:

a stroke-adjustable seat suspension comprises a frame body, a lifting mechanism and a control mechanism, wherein the frame body comprises an upper suspension, a telescopic suspension and a lower suspension, and the telescopic suspension is arranged between the upper suspension and the lower suspension and is connected with the upper suspension and the lower suspension; and an elastic compression part and an air pressure adjustable air pressure damper which are respectively connected with the upper suspension and the lower suspension are arranged in the telescopic suspension.

In the stroke-adjustable seat suspension provided by the invention, the upper suspension and the lower suspension play a role in supporting and fixing, when the seat suspension is subjected to the weight force (vertically downward), the seat suspension with the adjustable stroke generates vibration in the vertical direction, the air pressure damper and the elastic compression part generate rebound, and the magnitude of air pressure (the amount of air) in the air pressure damper influences the rebound speed, so that the characteristics of stroke adjustability in a certain range and small dynamic rigidity are realized, and a good vibration damping effect can be achieved on vibration with various amplitudes.

The suspension disclosed by the invention is simple in structure and low in manufacturing cost, has the advantages of obvious vibration reduction effect, good vibration isolation effect, low static rigidity, strong nonlinearity and the like by combining the air pressure damper and the elastic compression part, overcomes the defect that the strength cannot be adjusted according to the use condition in the motion process of the traditional suspension, obviously reduces the vibration transmitted to a human body from the outside, and improves the driving comfort of people.

Preferably, the telescopic suspension is a scissor suspension, and the scissor suspension is in threaded connection with the upper suspension and is fixedly connected with the lower suspension.

Preferably, the resilient compression member comprises a spring.

More preferably, the elastic compression part further comprises an oil pressure damper, the spring is sleeved on the oil pressure damper, and the oil pressure damper is connected with the upper suspension and the lower suspension through screws.

The spring and the oil pressure damper are combined in series, two-stage vibration reduction is realized, and better compression and recovery performance is realized.

Air pressure adjustable air dampers conventional in the art may be used in the present invention.

Preferably, the pneumatic dampers are 2 air dampers, and are symmetrically arranged on two sides of the elastic compression part, and the air dampers are provided with air supplement ports (302).

Preferably, the pneumatic damper is connected with the upper suspension through a screw, and the pneumatic damper is fixedly connected with the lower suspension.

In order to control the upper limit of the stroke of the air pressure damper, the situation that the rack is damaged due to an overlarge angle is avoided; preferably, the pneumatic damper is further provided with a limiter for limiting the movement of the pneumatic damper.

More preferably, the limiter is an angle limiter.

More preferably, the limiter is fixedly connected with the air pressure damper.

The invention also provides a driving chair, which comprises a cushion, wherein the bottom of the cushion is provided with the stroke-adjustable seat suspension.

Compared with the prior art, the invention has the following beneficial effects:

the stroke-adjustable seat suspension provided by the invention has the advantages of stroke adjustability, obvious vibration reduction effect, good vibration isolation effect, low static rigidity, strong nonlinearity and the like, overcomes the defect that the strength cannot be adjusted according to the use conditions in the motion process of the traditional suspension, obviously reduces the vibration transmitted from the outside to the human body, and improves the driving comfort of people.

Drawings

Fig. 1 is a schematic structural diagram of a stroke-adjustable seat suspension provided in embodiment 1;

FIG. 2 is another schematic structural view of the adjustable stroke seat suspension provided in embodiment 1;

FIG. 3 is another schematic structural view of the adjustable stroke seat suspension provided in embodiment 1;

wherein, 1 is a frame body, 101 is an upper suspension, 102 is a telescopic suspension, and 103 is a lower suspension; 2 is an elastic compression part; 3 is a pneumatic damper, 301 is a restrictor, and 302 is a gas supplement port.

Detailed Description

For a better understanding of the objects, aspects and advantages of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and the accompanying detailed description. It is to be understood that the following specific examples are illustrative of the invention and are not to be construed as limiting the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

It will be understood that when an element is referred to as being "disposed on," "disposed on," or "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Many modifications and variations are possible in light of the above teaching. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.