A suspension vibration reduction mechanism for a vehicle electric air compressor

Abstract

The present invention discloses a suspension and vibration damping mechanism for an electric air compressor used in a vehicle. The mechanism comprises a first elastic vibration damping member and a second elastic vibration damping member, which form a vibration damping system perpendicular to the air compressor. The first and second elastic vibration damping members absorb vibrations from the air compressor. By installing a strut-type suspension and vibration damping mechanism on the air compressor mounting bracket, the spring and rubber mounting sleeve absorb vibrations from the air compressor, reducing vibration noise generated by the vehicle during driving by approximately 10dB and improving ride comfort. The mechanism also reduces mechanical damage to the electric air compressor caused by vibration, improving its durability.

Description

Technical Field

[0001] The present invention relates to the field of vibration reduction of passenger car air compressors, and in particular to a suspension vibration reduction mechanism for a vehicle electric air compressor. Background Art

[0002] The electric air compressor in a passenger car's electronically controlled air suspension system is typically installed independently within the vehicle body, supplying compressed air to the suspension system. This compressor generates vibrations during operation. If left uncontrolled, these vibrations can be transmitted through the vehicle body, negatively impacting overall vehicle noise and ride comfort. In more severe cases, they can resonate with other components, impacting their durability. Summary of the Invention

[0003] In order to achieve the above object, the technical solution adopted by the present invention is:

[0004] A suspension vibration reduction mechanism for a vehicle electric air compressor, comprising:

[0005] A first elastic vibration-damping member and a second elastic vibration-damping member form a vibration-damping system with the air compressor in a vertical direction, and the first elastic vibration-damping member and the second elastic vibration-damping member absorb vibration of the air compressor.

[0006] Preferably, the first elastic vibration-damping member and the second elastic vibration-damping member are connected via a flexible buffering member, and the flexible buffering member is fixed to the bracket of the air compressor to avoid rigid connection between the first elastic vibration-damping member and the second elastic vibration-damping member and the bracket.

[0007] Further preferably, the first elastic vibration-damping component has a first spring, the second elastic vibration-damping component has a second spring and an adjacent fixing sleeve, the first spring and the second spring are clamped from the upper and lower sides of the flexible buffering component respectively, and the first spring, the flexible buffering component, the second spring and the fixing sleeve are fixed by a locking support assembly.

[0008] Further preferably, the locking support assembly includes a first locking piece and a second locking piece, and the first locking piece passes through the first spring, the flexible buffer member, the second spring and the fixing sleeve in sequence and is fixed to the second locking piece in shape or force.

[0009] Further preferably, the locking support assembly further includes a first support and a second support, the first support is located between the first locking member and the first spring, and the second support is located inside the fixing sleeve.

[0010] Further preferably, the upper portion of the flexible buffer member has an annular groove, the groove is used to be connected to the upper bracket of the air compressor, and the lower bracket of the air compressor is fixed between the second support and the second locking piece.

[0011] It can be defined that, it is characterized in that, the flexible buffer member is a rubber sleeve with a hardness of 40.

[0012] It can be defined that the fixing sleeve has a concave at the bottom and a protrusion at the top, the concave passes through the protrusion to form a penetrating hole structure, the second support is arranged in the concave, and the protrusion is embedded in the lower end of the second spring.

[0013] It can be defined that both the first spring and the second spring are coil springs, the elastic coefficient of the first spring is 2.5 N / mm, and the elastic coefficient of the second spring is 4.5 N / mm.

[0014] The beneficial effects of the present invention are:

[0015] The present invention provides a suspension and vibration reduction mechanism for an electric air compressor for a vehicle. By arranging a sliding column suspension and vibration reduction mechanism on the air compressor mounting bracket, a spring and a rubber fixing sleeve are used to absorb the vibration of the air compressor, thereby reducing the vibration noise generated during vehicle driving by about 10dB and improving ride comfort. At the same time, the mechanical damage to the electric air compressor caused by vibration is reduced, thereby improving durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments or the prior art.

[0017] Figure 1 It is an overall schematic diagram of the present invention.

[0018] Figure 2 It is a cross-sectional view of the present invention after removing the locking support assembly.

[0019] Figure 3 It is a structural diagram of the locking support assembly of the present invention.

[0020] Figure 4 It is a schematic diagram of the connection between the present invention and the air compressor. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. The above description is simplified for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0022] The following describes exemplary embodiments of the present application with reference to the accompanying drawings. However, it should be understood that the present application can be presented in many different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide many additional embodiments. In all figures, the same reference numerals represent the same elements or elements with the same function.

[0023] refer to Figure 1 A suspension vibration damping mechanism for an electric air compressor for a vehicle primarily comprises a first elastic vibration damping member 30 and a second elastic vibration damping member 40 disposed on the upper and lower sides of a flexible buffer member 10, secured together by a through-locking support assembly 20. By securing this mechanism to the air compressor, the first and second elastic vibration damping members 30, 40 cushion and offset vibrations generated during operation.

[0024] refer to Figure 2 In the cross-sectional structure shown, the first elastic vibration-damping member 30 is a first spring 31. The second elastic vibration-damping member 40 comprises a second spring 41 and an adjacent fixing sleeve 42. The fixing sleeve 42 has a recessed portion 42b at its lower portion and a protrusion 42a at its upper portion. The protrusion 42a is embedded in the lower end of the second spring 41 to secure one side of the second spring 41. The recessed portion 42b penetrates the protrusion 42a to form a penetrating hole.

[0025] refer to Figure 3The locking support assembly 20 includes a first locking member 21 and a second locking member 22. The first locking member 21 passes through the first spring 31, the flexible buffer member 10, the second spring 41, and the fixing sleeve 42 in sequence, and is then fixedly connected to the second locking member 22 by form or force. Preferably, the first locking member 21 is a bolt, and the second locking member 22 is a nut. The shank 21a of the bolt passes through the first spring 31, the flexible buffer member 10, the second spring 41, and the fixing sleeve 42, and then exits, engaging with the nut to secure it. A limiting sleeve 25 is also sleeved around the outer periphery of the shank 21a. The upper end of the limiting sleeve 25 engages with the first support 23, and the lower end passes through the protrusion 42a to engage with the second support 24. The limiting sleeve 25 allows the flexible buffer member 10 to slide freely along its axis. The first support 23 is located between the first locking member 21 and the first spring 31, and the second support 24 is located within the fixing sleeve 42. The first and second supports 23 and 24 increase the contact surface between the first and second springs 31 and 41 and the locking support assembly 20, ensuring their ends are secure.

[0026] Combine Figure 4 The flexible buffer member 10 has an annular groove 11 on its upper portion, which connects to the upper bracket 1 of the air compressor. The lower bracket 2 of the air compressor is sandwiched between the lower side of the second support 42 and the second locking member 22. In one embodiment of the present invention, the flexible buffer member 10 has a hardness of 40 degrees. The first spring 31 has an elastic modulus of 2.5 N / mm and a length of 20 mm to 25 mm. The second spring 41 has an elastic modulus of 4.5 N / mm and a length of 25 mm to 35 mm. The first and second springs 31, 41 are coil springs.

[0027] Natural frequency of the electric air compressor suspension vibration reduction system:

[0028]

[0029] f is the natural frequency, K is the stiffness of the vibration reduction system, and m is the mass of the electric air compressor.

[0030] Electric air compressor operating frequency:

[0031]

[0032] n is the speed of the electric air compressor.

[0033] Electric air compressor lower amplitude:

[0034]

[0035] r is the crankshaft radius of the electric air compressor, and m_1 is the dynamic unbalanced mass.

[0036] Amplitude of electric air compressor:

[0037]

[0038] Under normal circumstances, the following settings are used: K=7N / mm, m=3.9kg, n=3000r / min, r=0.008m.

[0039] The electric air compressor's suspension vibration reduction system has a natural frequency of approximately 12Hz, the electric air compressor's operating frequency is approximately 8Hz, and the vehicle's natural frequency is 1Hz to 2Hz, effectively preventing resonance. The electric air compressor's operating amplitude range is 1.5mm, and the springs effectively act as a buffer, reducing vehicle noise by approximately 10dB.

[0040] As used in this specification, the singular forms "a," "an," "said," and "the" include the plural forms unless otherwise expressly stated. The terms "include," "comprise," and "contain" as used in this specification indicate the presence of the claimed features, but do not exclude the presence of one or more additional features. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0041] It will be understood that although the terms "first," "second," etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from another. Thus, a first element may be referred to as a second element without departing from the teachings of the present invention.

Claims

1. A suspension and vibration reduction mechanism for an electric air compressor for a vehicle, characterized in that: include: a first elastic vibration-damping member and a second elastic vibration-damping member forming a vibration-damping system with the air compressor in a vertical direction, wherein the first elastic vibration-damping member and the second elastic vibration-damping member absorb vibrations of the air compressor; The first elastic vibration-damping member and the second elastic vibration-damping member are connected by a flexible buffer member, and the flexible buffer member is fixed to the bracket of the air compressor to prevent the first elastic vibration-damping member and the second elastic vibration-damping member from being rigidly connected to the bracket; The first elastic vibration-damping member comprises a first spring, and the second elastic vibration-damping member comprises a second spring and an adjacent fixing sleeve. The first spring and the second spring are clamped from the upper and lower sides of the buffer member, respectively. The first spring, the flexible buffer member, the second spring, and the fixing sleeve are fixed by a locking support assembly. The locking support assembly includes a first locking piece and a second locking piece, wherein the first locking piece passes through the first spring, the flexible buffer member, the second spring and the fixing sleeve in sequence and is then connected and fixed to the second locking piece in a form or force manner; The locking support assembly further includes a first support and a second support, wherein the first support is located between the first locking member and the first spring, and the second support is located inside the fixing sleeve; The flexible buffer member has an annular groove on its upper portion, the groove being used to connect to the upper bracket of the air compressor, and the lower bracket of the air compressor is fixed between the second support and the second locking member; The flexible buffer component is a rubber sleeve with a hardness of 40.

2. The suspension and vibration reduction mechanism for an electric air compressor for a vehicle according to claim 1, characterized in that: The fixing sleeve has a concave portion at its lower portion and a protrusion at its upper portion. The concave portion passes through the protrusion to form a penetrating hole-like structure. The second support is arranged in the concave portion, and the protrusion is embedded in the lower end portion of the second spring.

3. The suspension and vibration reduction mechanism for an electric air compressor for a vehicle according to claim 1, characterized in that: The first spring and the second spring are both coil springs, the elastic coefficient of the first spring is 2.5 N / mm, and the elastic coefficient of the second spring is 4.5 N / mm.

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