Car cab sound absorption device with sound absorption areas adjustable
A technology of sound-absorbing device and cab, which is applied to vehicle components, transportation and packaging, and the upper structure of trucks, etc. In order to avoid problems such as the decline of internal voice clarity, it can achieve the effects of easy industrialized mass production, guaranteed reverberation time, and simple structure.
Active Publication Date: 2015-05-27
长城汽车股份有限公司平湖分公司
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] However, when the vehicle is running at a low speed, there are fewer noise sources in the vehicle, and the noise level generated by each subsystem of the vehicle is relatively low. The application of a large number of sound-absorbing materials will lead to excessive sound absorption and insufficient reverberation time in the vehicle, resulting in The performance of the sound system is not good; in addition, insufficient reverberation time will lead to less reflected sound in the car, which will affect the transmission of voice to a certain extent, resulting in a decrease in the clarity of voice in the car
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0026] A sound absorption device for an automobile cabin with adjustable sound absorption, the structure of which is as follows figure 1 and figure 2 As shown, it includes a perforated plate 4, a frame 1, a drive rotation device 3, a double-layer swing blade 2, a vehicle speed sensor and a controller for controlling the operation of the drive rotation device 3.
[0027] The perforated plate 4 is a rectangular structure, and its top surface ( figure 1 The lower middle is the top surface, and the upper surface is the bottom surface) covered with a ceiling fabric 6, which is fixedly connected to the cab ceiling, and the perforated plate 4 is provided with two fixing holes 5 for reading lights.
[0028] The frame 1 is fixedly connected on the bottom surface of the perforated plate 4, and the driving rotation device 3 is located in the frame 1, including a driving motor 31 and a driven wheel 32, such as figure 2 and image 3 As shown, the drive motor 31 is fixedly connected to...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a car cab sound absorption device with sound absorption areas adjustable. The car cab sound absorption device with the sound absorption areas adjustable comprises a perforated plate which is fixedly connected with a ceiling of a cab, a frame which is fixedly connected with the bottom of the perforated plate and a double-layer pendulum leaf which is arranged in the frame, and further comprises a driving rotating device which is fixedly connected in the frame and connected with the double-layer pendulum leaf, wherein the driving rotating device is used for driving the double-layer pendulum leaf to rotate, and the double-layer pendulum leaf is a composite layer structure composed of a damping material layer and a sound reflection plate layer. The car cab sound absorption device with the sound absorption areas adjustable can adjust the position of the double-pendulum leaf according to different speed of the car, namely, when the speed of the car is high, the damping material layer of the double-layer pendulum leaf faces downward to ensure an enough sound absorption area in the car, when the speed of the car is low, the sound reflection plate layer faces downward to ensure enough reverberation time in the car. The car cab sound absorption device with the sound absorption areas adjustable is suitable for installation on various car ceilings.
Description
technical field [0001] The invention belongs to the field of sound-absorbing and noise-reducing products, and relates to sound-absorbing products in automobile cabs, in particular to a sound-absorbing device for automobile cabs with adjustable sound absorption. Background technique [0002] At present, with the continuous improvement of automobile research and development technology and people's living standards, people have higher and higher requirements for the ride comfort of automobiles. Noise is an important factor affecting comfort. In order to suppress the noise in the vehicle when the vehicle is running at high speed and ensure that the vehicle has sufficient sound absorption capacity, sound-absorbing materials are widely used in vehicle research and development. [0003] However, when the vehicle is running at a low speed, there are fewer noise sources in the vehicle, and the noise level generated by each subsystem of the vehicle is relatively low. The application o...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B60R13/08B62D33/06
Inventor 黄勇李博学麻玉连王海涛王志亮贾艳宾任永超
Owner 长城汽车股份有限公司平湖分公司