Suspension for vehicle

Abstract

A suspension for a vehicle includes: a bracket coupled to a vehicle body; a bushing accommodated in the bracket and configured to allow fluid to flow in response to the elastic deformation; an inner core movably coupled to the liner and configured to pressurize the liner; a tube interposed between the bracket and the bushing and surrounding the bushing; and an upper portion coupled to the bracket and covering the bushing. According to the present disclosure, a vehicle suspension may include a flow path in a liner that directs a flow of a fluid and utilizes an elastic characteristic of a damper that is elastically deformable in response to movement of an inner core and a damping characteristic that is responsive to the flow of the fluid. Accordingly, the vehicle suspension may improve performance and ride comfort of the vehicle by reducing noise, vibration, and vibration roughness, and improving both ride and operation performance.

Description

Technical Field

[0001] Exemplary embodiments of this disclosure relate to a suspension for a vehicle, and more specifically, to a suspension for a vehicle that can enhance vehicle ride comfort by reducing noise, vibration, and acoustic harshness (NVH) as well as improving ride and handling (R&H) performance. Background Technology

[0002] Suspension systems for vehicles typically connect the vehicle's axles and body to prevent vibrations or impacts transmitted from the vehicle's wheels to the road surface when the vehicle is in motion from being directly transmitted to the body, thereby preventing damage to the vehicle body and providing a comfortable ride for passengers.

[0003] In a vehicle suspension, an isolator is mounted on the piston rod for connection to the vehicle body. The isolator includes a bushing with damping function.

[0004] However, due to the nature of the bushing, it is difficult to both reduce noise, vibration, and harshness (NVH) and improve ride and handling (R&H) performance. Therefore, improvements are needed to address this issue.

[0005] The related technology of this utility model is disclosed in Korean Patent Application Publication No. 10-2019-0090310 (published on August 1, 2019, and entitled "Suspension Device for Vehicles"). Utility Model Content

[0006] Various implementations relate to a suspension for vehicles that can improve vehicle ride comfort by reducing noise, vibration, and harshness (NVH) as well as improving ride and handling (R&H) performance.

[0007] In one embodiment, a suspension for a vehicle may include: a bracket coupled to a vehicle body; a bushing housed in the bracket, wherein fluid flows in the bushing in response to elastic deformation; an inner core movably coupled to the bushing and configured to pressurize the bushing; a tube between the bracket and the bushing and surrounding the bushing; and an upper portion coupled to the bracket and covering the bushing.

[0008] The bushing may include: a damper coupled to the inner core, the damper having a chamber for containing fluid and configured to elastically deform when the inner core moves; and a fluid guide coupled to the damper and having a flow path that guides the flow of fluid supplied from the chamber when the damper elastically deforms.

[0009] The bushing can further include a reinforcement disposed within the damper and configured to reinforce a stiffness of the damper.

[0010] The chamber can include a first chamber disposed on a first side of the damper and connected to a first end of the flow path, and a second chamber disposed on a second side of the damper and connected to a second end of the flow path.

[0011] The first chamber and the second chamber can be disposed at different heights with respect to an axial direction of the bushing.

[0012] When the damper is elastically deformed, a volume of one of the first chamber and the second chamber can decrease to supply fluid to the flow path, and the other of the first chamber and the second chamber can receive fluid from the flow path to increase in volume as the damper is elastically deformed.

[0013] The inner core can include an inner core body accommodated inside the damper, a first protrusion protruding from a first side of the inner core body and inserted into the damper, and the first protrusion configured to pressurize the first chamber to decrease a volume of the first chamber, and a second protrusion protruding from a second side of the inner core body and inserted into the damper, and the second protrusion configured to pressurize the second chamber to decrease a volume of the second chamber.

[0014] The first protrusion and the second protrusion can be disposed at different heights with respect to an axial direction of the bushing.

[0015] The flow path can include a first fluid hole connected to the first chamber, wherein fluid passes through the first fluid hole, a second fluid hole connected to the second chamber, wherein fluid passes through the second fluid hole, and a flow path groove configured to connect the first fluid hole and the second fluid hole, wherein fluid flows in the flow path groove.

[0016] The flow path groove can be spirally disposed along a circumferential direction of the fluid guide.

[0017] According to the present disclosure, a vehicle suspension can include a flow path that guides a flow of fluid in a bushing, and utilizes an elastic characteristic that a damper can be elastically deformed in response to a movement of an inner core and a damping characteristic that is responsive to the flow of fluid. Accordingly, the vehicle suspension can improve performance and ride comfort of a vehicle by reducing noise, vibration, and harshness (NVH) and improving ride and handling (R&H) performance both.

[0018] Further, according to the present disclosure, when the inner core moves by the protrusion provided in the inner core and configured to pressurize the chamber, the vehicle suspension can improve the damping performance of the damper by increasing the volume change of the chamber. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view illustrating a suspension for a vehicle according to an embodiment of the present disclosure.

[0020] Figure 2 is an exploded perspective view of Figure 1

[0021] Figure 3 is a cross-sectional perspective view taken along line A-A of Figure 1

[0022] Figure 4 is a cross-sectional view taken along line A-A of Figure 1

[0023] Figure 5 is a perspective view illustrating a bushing in a vehicle suspension according to an embodiment of the present disclosure.

[0024] Figure 6 is an exploded perspective view of Figure 5

[0025] Figure 7 and Figure 8 is a cross-sectional view illustrating an operating state of a vehicle suspension according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] Hereinafter, a suspension for a vehicle will be described below by a plurality of exemplary embodiments with reference to the accompanying drawings. It should be considered that the thickness of each line or the size of each component in the drawings can be exaggerated for the sake of clarity and convenience of description. Further, the terms used herein are defined in consideration of the functions of the present disclosure, and the terms can be changed depending on the intention or practice of a user or an operator. Therefore, the terms should be defined based on the overall disclosure set forth herein.

[0027] Figure 1 is a perspective view illustrating a suspension for a vehicle according to an embodiment of the present disclosure. Figure 2 is an exploded perspective view of Figure 1 Figure 3 is a cross-sectional perspective view taken along line A-A of Figure 1 Figure 4 is a cross-sectional view taken along line A-A of Figure 1 Figure 5 is a perspective view illustrating a bushing in a vehicle suspension according to an embodiment of the present disclosure. Figure 6 is​​​​​​​Figure 5 a perspective view of the exploded view of FIG. 1.

[0028] Referring to Figures 1 to 6 A vehicle suspension 1 according to an embodiment of the disclosure includes a bracket 100, a bushing 200, an inner core 300, a tube 400, and an upper portion 500, which are described in detail as follows.

[0029] The bracket 100 is coupled to a vehicle body (not shown). The bracket 100 can include a bracket body 110 and a fastening member 120. The bracket body 110 can be disposed to face the vehicle body. The fastening member 120 can be exemplified by a bolt. The fastening member 120 can couple the bracket body 110 to the vehicle body to fix the bracket body 110 to a predetermined position on the vehicle body.

[0030] The bracket body 110 can include a through-hole 111, a seating portion 112, and a coupling groove 113. The through-hole 111 can be formed in a central portion of the bracket body 110 and can be formed by penetrating the bracket body 110 in a vertical direction (Z direction) of a thickness thereof. Figure 4

[0031] The seating portion 112 can be formed in the through-hole 111. The seating portion 112 can extend from an inner circumferential surface of the bracket body 110 toward the central portion of the bracket body 110 in a predetermined length and can be formed in a circumferential direction of the bracket body 110. The bushing 200 and the tube 400 can be located on the seating portion 112.

[0032] The coupling groove 113 can be formed on an outer side (upper side) of the through-hole 111. The coupling groove 113 can be concavely recessed on an inner surface of the bracket body 110 and can be formed along an edge of the bracket body 110. The upper portion 500 can be latched to the coupling groove 113. Figure 4

[0033] The bushing 200 can be accommodated in the bracket 100. The bushing 200 can be accommodated in the bracket body 110 and positioned inside the through-hole 111. The bushing 200 can be formed in a hollow shape empty such that a central portion thereof can communicate with the through-hole 111.

[0034] The bushing 200 can be located on the seating portion 112 to prevent the bushing 200 from being detached from the bracket body 110 through the through-hole 111. Fluids can flow in the bushing 200 in response to elastic deformation. The bushing 200 can include a damper 210, a fluid guide 220, and a reinforcement 230.

[0035] The damper 210 can be coupled to the inner core 300. The damper 210 can contain a rubber material that can be elastically deformed. The damper 210 can be elastically deformed when the inner core 300 moves.

[0036] ​​The damper 210 can include a chamber 211. The chamber 211 is a space for accommodating a fluid, and can include a first chamber 211a and a second chamber 211b.

[0037] The first chamber 211a can accommodate a fluid, and can be disposed at a first side (left side in FIG. 2) of the damper 210, and can be connected to a first end of a flow path 221, which will be described later. Figure 4

[0038] The second chamber 211b can accommodate a fluid, and can be disposed at a second side (right side in FIG. 2) of the damper 210, to be spaced apart from the first chamber 211a, and can be connected to a second end of the flow path 221. Figure 4

[0039] The first chamber 211a and the second chamber 211b can be disposed at different heights on the damper 210. The second chamber 211b can be disposed at a lower position than the first chamber 211a.

[0040] When the damper 210 is elastically deformed, the volume of one of the first chamber 211a and the second chamber 211b can decrease to supply a fluid to the flow path 221. Also, when the damper 210 is elastically deformed, the other of the first chamber 211a and the second chamber 211b can receive a fluid from the flow path 221 to expand in volume.

[0041] The fluid guide 220 can be coupled to the damper 210. The fluid guide 220 can include a flow path 221 that guides a flow of a fluid supplied from the chamber 211 when the damper 210 is elastically deformed.

[0042] The fluid guide 220 can include a flow path 221 that is supplied with a fluid from the chamber 211 when the damper 210 is elastically deformed, and through which the supplied fluid flows. The flow path 221 can include a first fluid hole 221a, a second fluid hole 221b, and a flow path groove 221c.

[0043] The first fluid hole 221a is connected to the first chamber 211a so that a fluid can pass through the first fluid hole 221a. The first fluid hole 221a is connected to a first end of the flow path groove 221c, and can supply a fluid received from the first chamber 211a to the flow path groove 221c or supply a fluid received from the flow path groove 221c to the first chamber 211a.

[0044] ​​The second fluid hole 221b is connected to the second chamber 211b so that fluid can pass from the second chamber 211b. The second fluid hole 221b is connected to a second end of the flow path groove 221c and can supply fluid received from the second chamber 211b to the flow path groove 221c or supply fluid received from the flow path groove 221c to the second chamber 211b.

[0045] The flow path groove 221c is connected to the first fluid hole 221a and the second fluid hole 221b so that fluid can flow through the flow path groove 221c. A first end of the flow path groove 221c is connected to the first fluid hole 221a, and a second end of the flow path groove 221c is connected to the second fluid hole 221b so that fluid can flow therethrough.

[0046] The flow path groove 221c can be formed in a spiral shape. The flow path groove 221c can be arranged in a spiral shape along a circumferential direction of the fluid guide 220. Accordingly, fluid can spiral along the flow path groove 221c toward an axial direction of the fluid guide 220.

[0047] The reinforcement 230 can be coupled to the damper 210 and reinforce rigidity of the damper 210. The reinforcement 230 can be arranged inside the damper 210 and integrally coupled to the damper 210, thereby functioning to reinforce rigidity of the damper 210 and support the damper 210. Accordingly, a shape of the damper 210 can be maintained.

[0048] The inner core 300 can be coupled to the bushing 200. The inner core 300 can be movably coupled to the bushing 200 and pressurize the bushing 200. The inner core 300 can be positioned inside the bracket 100.

[0049] The inner core 300 can be accommodated in the through-hole 111. The inner core 300 can be formed in a hollow shape so that a central portion thereof can communicate with the through-hole 111.

[0050] The inner core 300 can include a plastic or aluminum material. The inner core 300 can include an inner core body 310, a first protrusion 320, and a second protrusion 330. The inner core body 310 can be accommodated inside the damper 210.

[0051] The first protrusion 320 can be formed to protrude from a first side (a left side in FIG. 11) of the inner core body 310. The first protrusion 320 can be inserted into the damper 210 and coupled to the damper 210. The first protrusion 320 can be positioned on one side (a lower side in FIG. 11) of the first chamber 211a and can pressurize the first chamber 211a to reduce a volume of the first chamber 211a. Figure 4 Figure 4 The second protrusion 330 can be formed to protrude from a second side (a right side in FIG. 11) of the inner core body 310. The second protrusion 330 can be inserted into the damper 210 and coupled to the damper 210. The second protrusion 330 can be positioned on the other side (an upper side in FIG. 11) of the first chamber 211a and can pressurize the first chamber 211a to reduce the volume of the first chamber 211a.

[0052] ​The second protrusion 330 can be formed to protrude from the right side among the second side of the inner core body 310 Figure 4 in order to be spaced apart from the first protrusion 320. The second protrusion 330 can be inserted into the damper 210 and coupled to the damper 210. The second protrusion 330 can be located at one side among the upper side of the second chamber 211b Figure 4 and can pressurize the second chamber 211b to reduce the volume of the second chamber 211b.

[0053] The first protrusion 320 and the second protrusion 330 can be disposed at different heights. The second protrusion 330 can be disposed at a higher position than the first protrusion 320.

[0054] The tube 400 can be formed in a hollow shape empty such that a central portion thereof can communicate with the through-hole 111. The tube 400 can be accommodated in the through-hole 111 and interposed between the bracket body 110 and the bush 200 to surround the peripheral portion of the bush 200.

[0055] An inner circumferential surface of the tube 400 can surround the fluid guide 220. Accordingly, the tube 400 can prevent the fluid flowing along the flow path 221 from leaking to the outside. The tube 400 can be located on the seating portion 112 to prevent the tube 400 from moving downward out of the bracket body 110 through the through-hole 111.

[0056] The upper portion 500 can be coupled to the bracket 100 and can cover the bush 200. The upper portion 500 can be coupled to the bracket body 110 to cover the outer surface of the bush 200, that is, the top surface. The upper portion 500 can be formed in a hollow shape empty such that a central portion thereof can communicate with the through-hole 111. Figure 3

[0057] An edge of the upper portion 500 can be latched-coupled to the coupling groove 113. Accordingly, it is possible to prevent foreign substances from flowing into the bush 200 and to prevent the bush 200 from being detached upward out of the bracket body 110 through the through-hole 111.

[0058] The following is a description of an operation process of the vehicle suspension having the above-described configuration according to the embodiment of the disclosure.

[0059] Figure 7 and Figure 8 are sectional views illustrating an operation state of the vehicle suspension according to the embodiment of the disclosure.

[0060] Referring to Figures 1 to 7 ​In one embodiment, when the vehicle body moves and thus the inner core 300 moves upward, the damper 210 is elastically deformed. At the same time, the first protrusion 320 pressurizes the first chamber 211a upward to reduce the volume of the first chamber 211a. At this time, the fluid contained in the first chamber 211a is supplied to the flow path 221. The fluid flowing in the flow path 221 is delivered to the second chamber 211b to expand the volume of the second chamber 211b.

[0061] In another embodiment, when the vehicle body moves and thus the inner core 300 moves in one direction (left in Figure 7 ), the damper 210 is elastically deformed. When the inner core body 310 pressurizes the first chamber 211a, the volume of the first chamber 211a is reduced. At this time, the fluid contained in the first chamber 211a is supplied to the flow path 221. The fluid flowing in the flow path 221 is delivered to the second chamber 211b to expand the volume of the second chamber 211b.

[0062] Referring to Figures 1 to 6 and Figure 8 , in one embodiment, when the vehicle body moves and the inner core 300 moves downward, the damper 210 is elastically deformed. At the same time, the second protrusion 330 pressurizes the second chamber 211b downward to reduce the volume of the second chamber 211b. At this time, the fluid contained in the second chamber 211b is supplied to the flow path 221. The fluid flowing in the flow path 221 is delivered to the first chamber 211a to expand the volume of the first chamber 211a.

[0063] In another embodiment, when the vehicle body moves and the inner core 300 moves in the other direction (right in Figure 8 ), the damper 210 is elastically deformed. When the inner core body 310 pressurizes the second chamber 211b, the volume of the second chamber 211b is reduced. At this time, the fluid contained in the second chamber 211b is supplied to the flow path 221. The fluid flowing in the flow path 221 is delivered to the first chamber 211a to expand the volume of the first chamber 211a.

[0064] The vehicle suspension 1 according to the embodiment of the disclosure can include a flow path 221 that guides fluid flow in the bushing 200, and utilize the elastic property of the damper 210 that is elastically deformable in response to the movement of the inner core 300 and the damping property in response to the fluid flow. Accordingly, the vehicle suspension 1 can improve the performance and ride comfort of the vehicle by reducing noise, vibration, and harshness (NVH) and improving ride and handling (R&H) performance.

[0065] When the inner core 300 moves by the first protrusion 320 and the second protrusion 330 provided in the inner core 300 and configured to pressurize the chamber 211, the vehicle suspension 1 according to the embodiment of the disclosure can improve the damping performance of the damper 210 by increasing the volume change of the chamber 211.

[0066] The present disclosure has been described with reference to the embodiments illustrated in the drawings, but these are merely exemplary. It will be understood by those skilled in the art that various modifications and other equivalent embodiments can be made without departing from the essence and scope of the present disclosure.

Claims

1. A suspension for a vehicle, characterized by, The suspension for a vehicle includes: a bracket coupled to a vehicle body; a bushing housed in the bracket, wherein a fluid flows in the bushing in response to elastic deformation; an inner core movably coupled to the bushing and configured to pressurize the bushing; a tube interposed between the bracket and the bushing and surrounding the bushing; and an upper portion coupled to the bracket and covering the bushing.

2. The suspension for a vehicle according to claim 1, characterized by The bushing includes: a damper coupled to the inner core, the damper having a chamber housing a fluid, and the damper being configured to be elastically deformed when the inner core moves; and a fluid guide coupled to the damper, and the fluid guide having a flow path that guides a flow of the fluid supplied from the chamber when the damper is elastically deformed.

3. The suspension for a vehicle according to claim 2, characterized by The bushing further includes a reinforcement disposed within the damper and configured to reinforce a rigidity of the damper.

4. The suspension for a vehicle according to claim 3, characterized by The chamber includes: a first chamber arranged on a first side of the damper and connected to a first end of the flow path; and a second chamber arranged on a second side of the damper and connected to a second end of the flow path.

5. The suspension for a vehicle according to claim 4, characterized by The first chamber and the second chamber are arranged at different heights with respect to an axial direction of the bushing.

6. The suspension for a vehicle according to claim 5, wherein: a volume of one of the first chamber and the second chamber decreases to supply the fluid to the flow path when the damper is elastically deformed, and the other of the first chamber and the second chamber receives the fluid from the flow path to expand a volume when the damper is elastically deformed.

7. The suspension for a vehicle of claim 6, wherein, The inner core includes: an inner core body housed inside the damper; a first protrusion protruding from a first side of the inner core body and inserted into the damper, and the first protrusion being configured to pressurize the first chamber to decrease a volume of the first chamber; and a second protrusion protruding from a second side of the inner core body and inserted into the damper, and the second protrusion being configured to pressurize the second chamber to decrease a volume of the second chamber.

8. The suspension for a vehicle according to claim 7, characterized by The first protrusion and the second protrusion are arranged at different heights with respect to an axial direction of the bushing.

9. The suspension for a vehicle of claim 6, wherein, The flow path includes: a first fluid hole connected to the first chamber, wherein the fluid passes through the first fluid hole; a second fluid hole connected to the second chamber, wherein the fluid passes through the second fluid hole; and a flow path groove configured to connect the first fluid hole and the second fluid hole, wherein the fluid flows in the flow path groove.

10. The suspension for a vehicle of claim 9, wherein, The flow path groove is spirally arranged along a circumferential direction of the fluid guide.

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