阅读说明：本技术 车辆 (Vehicle with a steering wheel ) 是由 张战文 耿彦波 苏俊收 于 2019-11-29 设计创作，主要内容包括：本发明涉及一种车辆,车辆包括：车架(6)；驾驶室(1),设在车架(6)的上方；以及主动减振部,包括检测驾驶室(1)的振动的传感器(3)、与驾驶室(1)连接的作动器(4)和与传感器(3)和作动器(4)均电连接的控制器(7),控制器(7)配置成根据传感器(3)检测到的驾驶室(1)的振动控制作动器(4)动作以平衡驾驶室(1)的振动。应用本发明的技术方案,控制器(7)能够根据传感器(3)检测到的驾驶室(1)的振动控制作动器(4)动作以平衡驾驶室(1)的振动,改善了现有技术中存在的被动减振系统无法满足用户对舒适度的要求的问题。(The invention relates to a vehicle comprising: a frame (6); a cab (1) provided above the vehicle frame (6); and an active vibration damping part comprising a sensor (3) for detecting vibration of the cab (1), an actuator (4) connected to the cab (1), and a controller (7) electrically connected to both the sensor (3) and the actuator (4), the controller (7) being configured to control the actuator (4) to act to balance the vibration of the cab (1) in accordance with the vibration of the cab (1) detected by the sensor (3). By applying the technical scheme of the invention, the controller (7) can control the actuator (4) to act according to the vibration of the cab (1) detected by the sensor (3) so as to balance the vibration of the cab (1), and the problem that a passive vibration damping system in the prior art cannot meet the requirement of a user on comfort is solved.)

1. A vehicle, characterized by comprising:

a frame (6);

a cab (1) provided above the frame (6); and

an active vibration damping portion comprising a sensor (3) for detecting vibration of the cab (1), an actuator (4) connected to the cab (1), and a controller (7) electrically connected to both the sensor (3) and the actuator (4), the controller (7) being configured to control the actuator (4) to act to balance the vibration of the cab (1) in accordance with the vibration of the cab (1) detected by the sensor (3).

2. Vehicle according to claim 1, characterized in that the sensor (3) is configured to detect vibrations of a seat (2) in the cab (1).

3. The vehicle according to claim 1, characterized by further comprising a passive damping portion (5), the passive damping portion (5) comprising an elastic member arranged side by side in a vertical direction with the actuator (4) between the cab (1) and the frame (6).

4. A vehicle according to claim 3, characterized in that the elastic member is provided below the actuator (4).

5. The vehicle according to claim 1, characterized in that the actuator (4) comprises:

a piezoelectric ceramic (44) electrically connected to the controller (7); and

and a power output member (41) having one end connected to the piezoelectric ceramic (44) and the other end connected to the cab (1).

6. The vehicle according to claim 5, characterized in that the actuator (4) further comprises a housing provided with a through hole allowing the power output part (41) to pass therethrough, and a linear bearing (42) fitted to the power output part (41) is installed in the through hole.

7. The vehicle of claim 6, characterized in that the housing comprises:

a barrel-shaped housing (43) extending in a vertical direction;

an upper cover plate (46) provided above the tub-shaped case (43); and

and a lower cover plate (45) provided below the tub-shaped case (43).

8. The vehicle according to claim 6, characterized in that it further comprises a passive damping portion (5), said passive damping portion (5) comprising an elastic member connected with said housing.

9. The vehicle of claim 5, characterized in that the piezoelectric ceramic (44) comprises a laminated piezoelectric ceramic comprising a plurality of pieces of piezoelectric ceramic arranged in a vertical direction.

10. The vehicle according to claim 5, characterized in that the active damping further comprises a voltage amplifier (8), the voltage amplifier (8) being connected between the controller (7) and the piezoelectric ceramic (44).

Technical Field

The invention relates to the field of motor equipment, in particular to a vehicle.

Background

At present, engineering vehicles (including excavators, loaders, road rollers and the like) are widely used in construction sites of buildings, roads, mines, ports and the like, the road surface condition and the working environment of the site of the construction site are relatively severe, and in the working process, huge instantaneous impact is often accompanied to generate low-frequency vibration and shaking, and along with the continuous expansion of engineering machinery driver groups, the requirements of the engineering machinery drivers on the working environment are increasingly improved, so that higher requirements are provided for the vibration comfort of a cab. Due to the diversity and uncertainty of construction operation, the comfort of the cab also changes, and the vibration exceeding the limit can have extremely bad influence on the physiology and the psychology of the driver in the long-time operation process of the driver, so that the working efficiency is reduced.

The improvement of the human body comfort of engineering machinery operators mainly depends on a vibration reduction system of a cab and a vibration reduction system of a seat, and most of engineering machinery cabs adopt metal rubber vibration reduction or damping vibration absorbers with silicone oil for vibration reduction, and belong to a passive vibration reduction mode. In general, the stiffness coefficient of the metal rubber and the damping coefficient of the damping vibration absorber are determined constant values, once the parameters of the passive vibration attenuation system are determined, the application range is fixed, and if the application range is changed, the system needs to be redesigned, so that the passive vibration attenuation mode is only effective in a certain frequency range, and the adaptive frequency band is narrow. According to the vibration theory, the vibration damper has the vibration damping effect only when the ratio of the excitation frequency to the natural frequency of the system is more than 1.414, so that the passive vibration damping technology is only suitable for the vibration damping system in the middle and high frequency range. Because the passive vibration damping performance depends on the rigidity and the damping characteristic of the vibration damping element to a great extent, a plurality of defects exist in the aspects of low-frequency vibration damping, application frequency range and the like, and therefore the passive vibration damping has limitation on engineering application. Secondly, in order to obtain a good low-frequency vibration damping effect, the passive vibration damper needs a large static deformation, and in the field of engineering application, the problem of space limitation is often accompanied, and the passive vibration damping is difficult to obtain a large deformation space and obtain an expected low-frequency vibration damping effect. In addition, since the vibration damping characteristics of the passive vibration damping system are relatively fixed, it is difficult to exert a good vibration damping effect when the passive vibration damping system is used for coping with random vibration interference. The human body comfort bearing sensitive area is 0-80Hz and is mainly concentrated on a low frequency band, and the traditional passive vibration reduction system can not meet the requirement along with the improvement of the comfort requirement of people.

Disclosure of Invention

The present invention is directed to providing a vehicle to improve the problem in the related art that the conventional passive vibration damping system has not been able to satisfy the user's requirement for comfort.

According to an aspect of an embodiment of the present invention, there is provided a vehicle including:

a frame;

the cab is arranged above the frame; and

the active vibration reduction part comprises a sensor for detecting the vibration of the cab, an actuator connected with the cab and a controller electrically connected with the sensor and the actuator, and the controller is configured to control the actuator to act according to the vibration of the cab detected by the sensor so as to balance the vibration of the cab.

In some embodiments, the sensor is configured to detect vibration of a seat within the cab.

In some embodiments, the vehicle further includes a passive damping portion including an elastic member disposed vertically side by side with the actuator between the cab and the frame.

In some embodiments, the resilient member is disposed below the actuator.

In some embodiments, the actuator comprises:

the piezoelectric ceramic is electrically connected with the controller; and

and one end of the power output component is connected with the piezoelectric ceramic, and the other end of the power output component is connected with the cab.

In some embodiments, the actuator further comprises a housing, the housing is provided with a through hole for allowing the power output part to pass through, and the through hole is internally provided with a linear bearing matched with the power output part.

In some embodiments, the housing comprises:

a barrel-shaped housing extending in a vertical direction;

the upper cover plate is arranged above the barrel-shaped shell; and

and the lower cover plate is arranged below the barrel-shaped shell.

In some embodiments, the vehicle further includes a passive damping portion including a resilient member coupled to the housing.

In some embodiments, the piezoelectric ceramic comprises a laminated piezoelectric ceramic comprising a plurality of pieces of piezoelectric ceramic arranged in a vertical direction.

In some embodiments, the active damping portion further comprises a voltage amplifier connected between the controller and the piezoelectric ceramic.

By applying the technical scheme of the invention, the controller can control the actuator to act according to the vibration of the cab detected by the sensor so as to balance the vibration of the cab, and the problem that a passive vibration reduction system in the prior art cannot meet the requirement of a user on comfort level is solved.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the related art, the drawings needed to be used in the description of the embodiments or the related art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 illustrates a partial perspective view of a vehicle according to an embodiment of the present invention;

FIG. 2 illustrates a partial cross-sectional structural schematic view of a vehicle according to an embodiment of the present invention;

FIG. 3 illustrates an enlarged partial view of the interface of the cab and the frame of the vehicle of an embodiment of the present invention;

FIG. 4 shows a control schematic block diagram of a vehicle of an embodiment of the invention; and

FIG. 5 shows a control logic diagram of a vehicle of an embodiment of the present invention.

In the figure:

1. a cab; 2. a seat; 3. a sensor; 4. an actuator; 41. a power take-off component; 42. a linear bearing; 43. a barrel-shaped housing; 44. piezoelectric ceramics; 45. a lower cover plate; 46. an upper cover plate; 47. a signal transmission port; 5. a passive vibration damping portion; 6. a frame; 7. a controller; 8. and a voltage amplifier.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 shows a partial perspective view of a vehicle of the present embodiment; fig. 2 shows a partial cross-sectional structural view of the vehicle of the embodiment; fig. 3 shows a partially enlarged view of the interface between the cab 1 and the vehicle frame 6 of the vehicle of the present embodiment.

As shown in fig. 1 to 3, the vehicle of the present embodiment includes a vehicle frame 6, a cab 1 mounted on the vehicle frame 6, and an active vibration damping portion including a sensor 3 that detects vibration of the cab 1, an actuator 4 connected to the cab 1, and a controller 7 electrically connected to both the sensor 3 and the actuator 4, the controller 7 being configured to control the actuator 4 to operate to balance the vibration of the cab 1 based on the vibration of the cab 1 detected by the sensor 3.

In this embodiment, controller 7 can control actuator 4 to act according to the vibration of cab 1 detected by sensor 3 to balance the vibration of cab 1, which improves the problem that the passive vibration damping system in the prior art cannot meet the requirement of the user on comfort.

In some embodiments, the sensor 3 is an acceleration sensor.

In the present embodiment, the sensor 3 is provided below the seat 2 in the cab 1 so that the active vibration damping portion directly controls the operation of the actuator 4 in accordance with the vibration of the seat 2, which is advantageous in improving the riding comfort of the vehicle.

The vehicle further comprises a passive damping portion 5, the passive damping portion 5 comprising an elastic member, which is arranged side by side in the vertical direction between the cab 1 and the frame 6, and the actuator 4.

In the present embodiment, the elastic member is provided below the actuator 4 and connected to the actuator 4.

Four corners of the cab 1 are respectively provided with an actuator 4, and an elastic part is arranged below each actuator 4. The actuator 4 is arranged in series with the elastic member and is fixed to the frame 6 by bolts. Optionally, the elastic member is made of rubber.

The actuator 4 includes a piezoelectric ceramic 44 and a power output member 41 electrically connected to the controller 7. One end of the power output member 41 is connected to the piezoelectric ceramics 44, and the other end is connected to the cab 1.

In some embodiments, the power output member 41 has a rod shape, and the rod-shaped power output member 41 extends in the vertical direction.

The actuator 4 further comprises a housing provided with a through hole allowing the power take-off part 41 to pass through, and a linear bearing 42 fitted to the power take-off part 41 is installed in the through hole. The elastic member of the passive vibration damping portion 5 is connected to the housing of the actuator 4.

The housing of the actuator 4 includes a barrel housing 43 extending in the vertical direction, an upper cover plate 46 provided above the barrel housing 43, and a lower cover plate 45 provided below the barrel housing 43. A through hole allowing the power output part 41 to pass through is provided on the lower cover plate 45.

The piezoelectric ceramics 44 are laminated piezoelectric ceramics including a plurality of pieces of piezoelectric ceramics arranged in the vertical direction.

The active damping section further comprises a voltage amplifier 8, the voltage amplifier 8 being connected between the controller 7 and the piezoelectric ceramic 44. A controller 7 and a voltage amplifier 8 are provided in the cab 1.

The actuator 4 further includes a signal transmission port 47 provided on the outer side of the housing, and a cable connected to the voltage amplifier 8 is connected to the signal transmission port 47 to connect the voltage amplifier 8 to the piezoelectric ceramic 44.

FIG. 4 shows a control schematic block diagram of a vehicle of an embodiment of the invention; FIG. 5 shows a control logic diagram of a vehicle of an embodiment of the present invention.

As shown in fig. 1 to 5, when the construction machine is operated, vibrations or impacts are transmitted to the frame 6 by excitation of the engine, the road surface, the working device, and the like, and the vibrations of the frame 6 are damped by the damper made of rubber material of the passive damping portion 5, so that medium-high frequency vibrations are effectively isolated.

Further, the vibration or impact of the vehicle body frame 6 is transmitted to the actuator 4 having the piezoelectric ceramics 44, and the cab 1 is vibrated, thereby vibrating the sensor 3. Sensor 3 picks up the vibration or shock signal of cab 1 and sends it to controller 7. The controller 7 contains a control program, the controller 7 judges the received vibration acceleration real-time signal in real time, when the effective value of the vibration acceleration is within the range of the set threshold value, the controller 7 has no control signal output, the actuator 4 does not work, the rigid connection effect is realized, meanwhile, the device has a certain service life protection effect, only the passive vibration damping system acts at the moment, and the elastic component of the passive vibration damping system still keeps the effect of simple passive vibration damping within the effective vibration damping frequency band.

When the effective value of the vibration acceleration is not within the set threshold range, the controller 7 outputs a control signal according to a designed control algorithm, the voltage amplifier 8 amplifies the control signal to drive the laminated piezoelectric ceramics 44 in the piezoelectric actuator 4, and the inverse piezoelectric effect of the piezoelectric ceramics 44 is utilized to control the driving voltage of the two ends of the piezoelectric ceramics 44, so that the piezoelectric ceramics 44 correspondingly extends and contracts, the displacement of the upper end surface of the piezoelectric ceramics is reduced, and the vibration quantity of the cab is reduced. The controller 7 adjusts and outputs a control signal in real time according to the vibration acceleration real-time feedback signal, so that the active control of the vibration of the cab 1 is realized, the purpose of active vibration reduction is achieved, and the middle and low frequency vibration is effectively isolated. Therefore, the active and passive hybrid integrated vibration damping system can provide vibration damping in a wider frequency band, can achieve the best vibration damping effect, improves the impact resistance and smoothness of the cab, and effectively improves the operation comfort.

When the active vibration damping part fails, the passive vibration damping part 5 still keeps the passive vibration damping effect in the effective vibration damping frequency band, so that the safety and the stability of the vibration damping system are improved, and the complexity of the active vibration damping system is also reduced.

The technical scheme of the embodiment has the following technical effects:

1. the vibration damping system comprises an active vibration damping part and a passive vibration damping part 5 which are connected in series, wherein the active vibration damping part comprises a controller 7, a voltage amplifier 8, an actuator 4 and a sensor 3, the active vibration damping part is mainly realized by a piezoelectric ceramic actuator 4, and the middle-low frequency vibration damping performance is good. The passive vibration damping part 5 comprises an elastic component made of rubber, vibration damping in a high frequency band is mainly achieved, vibration damping in a wide frequency band can be provided through the integrated design of two systems, and the optimal vibration damping effect can be achieved.

2. The actuator 4 includes a power output part 41, a linear bearing 42, a barrel case 43, a piezoelectric ceramic 44, a lower cover plate 45, an upper cover plate 46, and a signal transmission port 47. The laminated piezoelectric ceramic is adopted to provide main power, and has the advantages of small volume, light weight, high rigidity, no heating, fast frequency response, high resolution, high control precision, large control bandwidth and the like;

3. the mode that a plurality of pieces of piezoelectric ceramics are connected in series and combined to be provided with a voltage amplifier can meet the requirements of low driving voltage and high output displacement at the same time;

4. the control method is used for carrying out real-time feedback according to the vibration acceleration amplitude of the cab, inhibiting the vibration of the cab and improving the vibration comfort.

The present invention is not limited to the above exemplary embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.