Adjustable quarter-wave tube of automobile air suspension system

Abstract

The utility model discloses an adjustable quarter-wave tube of an automobile air suspension system, and relates to the technical field of noise reduction and elimination parts of the air suspension system. Therefore, external driving equipment drives the gear to rotate forwards and backwards, namely, the rotary motion of the external motor is changed into the axial telescopic motion of the pull rod, the piston cylinder is driven to ascend and descend, the length of the tuning cavity in the connecting pipe body is adjusted, and specific-frequency noise under different working conditions is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction and silencer components of an air suspension system, in particular to an adjustable quarter-wavelength tube of an automobile air suspension system. Background Art

[0002] The current automobile air suspension noise mainly comes from the following points:

[0003] (1) Vibration noise of the air compressor body;

[0004] (2) Aerodynamic noise generated by the air compressor when it is working;

[0005] (3) The whistling noise caused by high-speed airflow during exhaust and the noise caused by friction in the pipe.

[0006] In terms of silencing methods, the vibration of the air compressor body is mainly buffered by the shock-absorbing pad between the compressor and the vehicle body. Aerodynamic noise, whistling and pipe friction noise are mainly reduced by adding passive silencing elements. Commonly used silencing elements include expansion chambers, silencing cotton chambers, 1 / 4 wavelength tubes, Helmholtz mufflers, etc.

[0007] Since there are many kinds of system parts in the space layout of the automobile chassis, the space left for the air suspension system parts is very limited. Therefore, the mass-produced models on the current market are basically equipped with only one silencer element to eliminate the high-decibel noise of the characteristic frequency, which results in a very limited silencer effect and cannot meet the demand for eliminating the multi-frequency noise generated by the compressor when it is working. However, installing two or more silencer elements will bring new space layout problems to the automobile chassis. For this reason, the utility model proposes an adjustable automobile air suspension system quarter-wave tube. Utility Model Content

[0008] In order to solve the technical problems existing in the background technology, the utility model provides an adjustable quarter-wavelength tube of an automobile air suspension system.

[0009] The utility model provides an adjustable quarter-wavelength tube of an automobile air suspension system, comprising a connecting tube body, a tuning cavity being a part of the inner cavity of the connecting tube body, an adjusting mechanism being provided on the connecting tube body, and the adjusting mechanism being used to adjust the length of the tuning cavity.

[0010] Preferably, the adjusting mechanism includes a piston cylinder, and a pull rod is provided in the piston cylinder, one end of the pull rod extends to the outside of the connecting tube body, and a rack is installed on one end of the pull rod, a gear is provided on one side of the rack, and the gear is meshed with the rack, and the gear is driven by an external motor to rotate forward and reversely. The external motor is controlled by a controller, and the controller gives different control signals to the external motor according to the air compressor speed and the exhaust solenoid valve signal to control the lifting and lowering of the rack, thereby driving the piston cylinder to lift and lower, and then adjusting the length of the tuning chamber.

[0011] Preferably, a C-type clamp is installed between the piston cylinder and the pull rod, and the C-type clamp is used to fix the connecting rod and the piston cylinder. The C-type clamp clamps the rack pull rod into the inside of the piston cylinder, thereby ensuring that the piston cylinder can be synchronously extended and retracted in the connecting tube body when the rack pull rod is stretched.

[0012] Preferably, a first sealing ring is installed on the piston cylinder.

[0013] Preferably, the rack and the pull rod are integrally formed.

[0014] Preferably, an air passage is provided on the connecting tube body, both sides of the air passage are connected with air nozzle joints, the air passage is connected with the tuning cavity, and the connecting tube body is a wavelength tube body in the prior art and is T-shaped.

[0015] Preferably, a second sealing ring is installed at the connection between the air valve joint and the air passage.

[0016] Preferably, a top cover is installed on the connecting tube body, and the top cover is used to prevent the piston cylinder from detaching from the connecting tube body, and the top cover and the connecting tube body are riveted, the pull rod passes through and extends to the outside of the top cover, and the penetration point between the pull rod and the top cover is a sliding connection.

[0017] In the utility model, the proposed adjustable automobile air suspension system quarter-wave tube has the following beneficial technical effects:

[0018] 1. By setting up the adjustment mechanism and utilizing the meshing of gears and racks, the external driving device can drive the gears to rotate forward and backward, thereby converting the rotational motion of the external motor into the axial telescopic motion of the pull rod, thereby driving the piston cylinder to rise and fall, and then adjusting the length of the tuning cavity in the connecting tube body, thereby eliminating specific frequency noise under different working conditions.

[0019] 2. This application uses only one silencer element, which occupies a small space in the vehicle layout, so that the air suspension system can still eliminate multi-frequency noise when only a single silencer element is installed, while occupying less vehicle chassis assembly space and meeting more comprehensive noise reduction needs.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of the structure of the utility model;

[0022] Figure 2 It is the front view of the structure of the utility model;

[0023] Figure 3 It is a side view of the structure of the utility model.

[0024] In the figure, 1. gear; 2. rack; 3. top cover; 4. C-type card; 5. piston cylinder; 6. first sealing ring; 7. connecting tube body; 8. tuning chamber; 9. air duct; 10. second sealing ring; 11. air nozzle joint; 12. pull rod. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] like Figure 1-Figure 3 An adjustable quarter-wavelength tube of an automobile air suspension system shown in the figure includes a connecting tube body 7, a tuning cavity 8 is provided in the connecting tube body 7, the tuning cavity 8 is a part of the inner cavity of the connecting tube body 7, the connecting tube body 7 and the tuning cavity 8 are prior arts, an adjusting mechanism is provided on the connecting tube body 7, and the adjusting mechanism is used to adjust the length of the tuning cavity 8.

[0027] A further improvement of the technical solution is that the adjustment mechanism includes a piston cylinder 5, and a pull rod 12 is provided in the piston cylinder 5, one end of the pull rod 12 extends to the outside of the connecting tube body 7, and a rack 2 is installed at one end of the pull rod 12, a gear 1 is provided on one side of the rack 2, and the gear 1 is meshed with the rack 2, and the gear 1 is driven by an external motor to rotate forward and reverse, and the external motor is controlled by a controller. The controller gives different control signals to the external motor according to the air compressor speed and the exhaust solenoid valve signal to control the lifting and lowering of the rack 2, thereby driving the piston cylinder 5 to lift and lower, and then adjusting the length of the tuning cavity 8.

[0028] A further improvement of the technical solution is that a C-type clamp 4 is installed between the piston cylinder 5 and the pull rod 12, and the C-type clamp 4 is used to fix the connecting rod 12 and the piston cylinder 5. The C-type clamp 4 clamps the rack 2 pull rod 12 into the inside of the piston cylinder 5, thereby ensuring that the piston cylinder 5 synchronously retracts and contracts in the connecting tube body 7 when the rack 2 pull rod 12 moves in tension.

[0029] A further improvement of the technical solution is that a first sealing ring 6 is installed on the piston cylinder 5 .

[0030] A further improvement of the technical solution is that the rack 2 and the pull rod 12 are integrally formed.

[0031] A further improvement of the technical solution is that an air duct 9 is provided on the connecting tube body 7, both sides of the air duct 9 are connected with air nozzle joints 11, the air duct 9 is connected with the tuning cavity 8, and the connecting tube body 7 is a wavelength tube body in the prior art and is T-shaped.

[0032] A further improvement of the technical solution is that a second sealing ring 10 is installed at the connection between the air valve joint 11 and the air passage 9 .

[0033] A further improvement of the technical solution is that a top cover 3 is installed on the connecting tube body 7, and the top cover 3 is used to prevent the piston cylinder 5 from detaching from the connecting tube body 7, and the top cover 3 and the connecting tube body 7 are riveted, and the pull rod 12 passes through and extends to the outside of the top cover 3, and the penetration point of the pull rod 12 and the top cover 3 is a sliding connection.

[0034] By setting up the adjustment mechanism and utilizing the meshing of the gear 1 and the rack 2, the external driving device can drive the gear 1 to rotate forward and reversely, thereby converting the rotational motion of the external motor into the axial telescopic motion of the pull rod 12, thereby driving the piston cylinder 5 to rise and fall, and then adjusting the length of the tuning cavity 8 in the connecting tube body 7, thereby eliminating specific frequency noise under different working conditions.

[0035] This application uses only one silencer element, which occupies little space in the entire vehicle layout, so that the air suspension system can still eliminate multi-frequency noise when only a single silencer element is installed, while occupying less vehicle chassis assembly space and meeting more comprehensive noise reduction needs.

[0036] During the working process of this embodiment:

[0037] The interior of the connecting tube body 7 mainly includes a tuning chamber 8 and an air passage 9, which are directly connected in the connecting tube body 7. The two ends of the air passage 9 are connected to the outer air intake and exhaust pipes using a VOSS air nozzle joint 11, and a sealing ring is used to seal between the connecting tube body 7 and the air nozzle joint 11 to prevent air leakage. The connecting tube body 7 uses the expansion and contraction of the piston cylinder 5 in the tube body to control the length of the tuning chamber 8, thereby eliminating noise of a specific frequency. When the tuning chamber 8 is adjusted to different lengths, noise of different frequency bands can be eliminated. A sealing ring is used to seal between the piston cylinder 5 and the connecting tube body 7.

[0038] Inside the piston cylinder 5, the C-type clamp 4 clamps the rack 2 pull rod 12 into the piston cylinder 5, thereby ensuring that the piston cylinder 5 is synchronously extended and retracted in the connecting tube body 7 when the rack 2 pull rod 12 is stretched. At the top of the connecting tube body 7, the top cover 3 and the tube body are connected and limited by riveting technology, thereby ensuring that the piston cylinder 5 will not move outside the connecting tube body 7.

[0039] On the other side of the tie rod 12, a gear 1 and rack 2 structure is used for transmission. Through the toothed meshing of gear 1 and rack 2, the rotational motion of the external motor is converted into the axial telescopic motion of the tie rod 12. Gear 1 is connected to the motor module. The controller uses the air compressor speed signal and the exhaust solenoid valve signal as signal input to control the motor's opening and closing bidirectional rotation in real time, thereby driving the rotation of gear 1. The muffler frequency can be automatically adjusted according to the vehicle's working conditions to meet the needs of multi-frequency noise elimination.

[0040] As a commonly used muffler element, the main muffler parameters of the quarter-wavelength tube are the diameter and length of the tube body. Since the size and frequency of aerodynamic noise, exhaust whistle and pipeline friction noise at different speeds of the air compressor are different, the utility model can automatically control and adjust the length of the quarter-wavelength tube according to the speed of the air compressor, exhaust solenoid valve signal and other signals as control inputs, thereby eliminating specific frequency noise under different working conditions.

[0041] Since the main content of this application is the quarter-wavelength tube structure, the complete controller and motor module structure is not shown. The controller and motor module can be matched according to the functional requirements of the project.

[0042] The present application relates to a noise reduction and silencing structure of an air suspension system, which can be installed on the intake and exhaust pipes of the air suspension system of a fuel vehicle or an electric vehicle.

[0043] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0044] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An adjustable quarter-wavelength tube of an automobile air suspension system, comprising a connecting tube body (7), wherein a tuning cavity (8) is provided in the connecting tube body (7), characterized in that: The connecting tube body (7) is provided with an adjusting mechanism, and the adjusting mechanism is used to adjust the length of the tuning cavity (8); The regulating mechanism comprises a piston cylinder (5), and a pull rod (12) is arranged inside the piston cylinder (5), one end of the pull rod (12) extends to the outside of the connecting tube body (7), and a rack (2) is installed at one end of the pull rod (12), a gear (1) is arranged on one side of the rack (2), and the gear (1) is meshed with the rack (2); A top cover (3) is installed on the connecting tube body (7), and the top cover (3) is used to prevent the piston cylinder (5) from detaching from the connecting tube body, and the top cover (3) and the connecting tube body (7) are riveted, and the pull rod (12) passes through and extends to the outside of the top cover (3).

2. The adjustable quarter-wavelength tube of automobile air suspension system according to claim 1, characterized in that: A C-type clamp (4) is installed between the piston cylinder (5) and the pull rod (12), and the C-type clamp (4) is used to fix the pull rod (12) and the piston cylinder (5).

3. The adjustable quarter-wavelength tube of automobile air suspension system according to claim 1, characterized in that: A first sealing ring (6) is installed on the piston cylinder (5).

4. The adjustable quarter-wavelength tube of automobile air suspension system according to claim 1, characterized in that: The connecting pipe body (7) is provided with an air passage (9), both sides of the air passage (9) are connected to air nozzle joints (11), and the air passage (9) is connected to the tuning chamber (8).

5. The adjustable quarter-wavelength tube of automobile air suspension system according to claim 4, characterized in that: A second sealing ring (10) is installed at the connection between the air nozzle joint (11) and the air passage (9).

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