GB2516762A - Bushing for a vehicle - Google Patents

Bushing for a vehicle Download PDF

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Publication number
GB2516762A
GB2516762A GB1411495.3A GB201411495A GB2516762A GB 2516762 A GB2516762 A GB 2516762A GB 201411495 A GB201411495 A GB 201411495A GB 2516762 A GB2516762 A GB 2516762A
Authority
GB
United Kingdom
Prior art keywords
bushing
outer member
vehicle
stiffness
longitudinal direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1411495.3A
Other versions
GB201411495D0 (en
Inventor
Satyavrat Mane
Chandran Subramani
Georg Bettinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimler AG filed Critical Daimler AG
Priority to GB1411495.3A priority Critical patent/GB2516762A/en
Publication of GB201411495D0 publication Critical patent/GB201411495D0/en
Publication of GB2516762A publication Critical patent/GB2516762A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
    • F16F1/3807—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type characterised by adaptations for particular modes of stressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/02—Attaching arms to sprung part of vehicle

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • Vibration Prevention Devices (AREA)
  • Springs (AREA)

Abstract

A resilient bushing 10 for a vehicle is provided. The bushing 10 comprises: an outer member 12; an inner member 16 arranged at least partially in the outer member 12; and an intermediate member 20 having at least one elastic body 22 for supporting the outer member 12 on the inner member 16. The intermediate member 20 is movably supported on the outer member 12 and movable in relation to the outer member 12 in the peripheral direction of the outer member 12.

Description

Bushing for a Vehicle The invention relates to a bushing according to the preamble of patent claim 1.
Such a bushing for a vehicle is known from JR 2008249081 A. The bushing comprises an outer member and an inner member arranged at least partially in the outer member. The bushing further comprises an intermediate member having at least one elastic body for supporting the outer member on the inner member. For example, such a bushing is used to support a control arm such as a longitudinal control arm or a transverse control arm on a body or a frame of a vehicle. At least one wheel of the vehicle is pivotably coupled to the body or the frame via the control arm. The control arm serves to guide the wheel of the vehicle.
Since the bushing comprises the elastic body, the bushing is also referred to as a rubber bushing". Rubber bushings at various attachment points of a vehicle play an important role in ride quality and handling of the vehicle. A good ride quality can be realized by a low stiffness of the bushing in the longitudinal direction, whereas a good handling can be realized by a high stiffness in the transverse direction of the vehicle. Thus, the ride quality and the handling are two conflicting parameters in vehicle dynamics. Hence, in existing bushing designs compromises are made either in the ride quality or in the handling of the vehicle.
Therefore, it is an object of the present invention to provide a bushing of the aforementioned kind, by means of which bushing both a particularly good ride quality as well as a particularly good handling of a vehicle can be realized.
This object is solved by a bushing having the features of patent claim 1. Advantageous embodiments with expedient and non-trivial developments of the invention are indicated in the other patent claims.
In order to provide a bushing of the kind indicated in the preamble of patent claim 1, by means of which bushing both a particularly good ride quality as well as a particularly good handling of a vehicle can be realized, according to the present invention, the intermediate member is movably supported on the outer member and movable in relation to the outer member in the peripheral direction of the outer member. In other words, the bushing comprises a mounting in which the intermediate member, in particular the elastic body, is movably supported on the outer member so that the intermediate member can be moved, in particular rotated, in relation to the outer member in the peripheral direction of the latter.
This means the mounting specifically allows the intermediate member, in particular the elastic body, to rotate relative to the outer member in the peripheral direction of the outer member. Thereby, an adequate stiffness of the bushing in the axial direction and/or the radial direction of the bushing can be realized. For example, the axial direction of the bushing corresponds with the vertical direction (z-direction) of the vehicle. Moreover, the radial direction of the bushing can correspond with the transverse direction (y-direction) of the vehicle. Thus, a particularly high stiffness in the vertical direction and the transverse direction of the vehicle can be realized. However, the stiffness of the bushing in the longitudinal direction of the vehicle can be kept particularly low. Thereby, a particularly high ride quality as well as a particularly good handling can be realized by means of the bushing according to the present invention.
The design of the bushing according to the present invention helps decouple the stiffness of the bushing in the longitudinal direction from the stiffness of the bushing in the transverse direction so that a particularly high ratio of the stiffness in the longitudinal direction and the stiffness in the transverse direction can be realized which in turn allows for realizing a high ride quality and good handling. In other words, the bushing according to the present invention is a rubber bushing having anisotropic characteristics with respect to the stiffness of the bushing in the respective directions.
Preferably the inner member is fixed in relation to the outer member in the axial direction and/or the radial direction of the outer member. For example, the intermediate member is slidably supported on the outer member. This means said mounting is configured as a slide bearing so that the intermediate member can be slid in relation to the outer member.
In a particularly advantageous embodiment of the invention, the bushing comprises at least one roller bearing via which the intermediate member is supported on the outer member. Thereby, wearing of the bushing can be kept particularly low. Moreover, the bushing can be robust and durable and the stiffness in the longitudinal direction can be kept particularly low thereby increasing the ratio of the stiffness in the transverse direction and the stiffness in the longitudinal direction.
Further advantages, features, and details of the invention derive from the following description of preferred embodiments as well as from the drawings. The features and feature combinations previously mentioned in the description as well as the features and feature combinations mentioned in the following description of the figures and/or shown in the figures alone can be employed not only in the respective indicated combination but also in any other combination or taken alone without leaving the scope of the invention.
The drawings show in: Fig. 1 a schematic perspective view of a bushing comprises an inner member, an outer member and an intermediate member, wherein, according to a first embodiment of the bushing, the intermediate member is slidably supported on the outer member; Fig. 2 a schematic sectional view of the bushing according to the first embodiment; Fig. 3 a schematic isometric view of the bushing according to the first embodiment; Fig. 4 a schematic perspective view of the bushing according to the first embodiment; Fig. 5 a schematic side view of two cylinders by means of which the working principle of the bushing is illustrated; and Fig. 6 a schematic sectional view of the bushing according to a second embodiment.
In the figures the same elements or elements having the same functions are designated with the same reference signs.
Fig. 1 shows a bushing 10 for a vehicle, in particular a motor vehicle. For example, the motor vehicle is a passenger vehicle. As can be seen in Figs. 1 to 3, the bushing 10 comprises an outer member 12 having a cylindrical peripheral outer surface 14.
Moreover, the bushing 10 comprises an inner member 16. For example, the outer member 12 and the inner member 16 are rigid. This means the outer member 12 and the inner member 16 are not elastic. The inner member 16 is arranged at least partially in the outer member 12.
The inner member 16 has a through opening 18 by means of which the bushing 10 can be mounted on, for example, a frame or a body or a control arm of the vehicle. For example, at least one control arm of the vehicle is mounted on the frame or the body of the vehicle via the bushing 10. The vehicle comprises at least one wheel which is pivotably coupled to the body or the frame via the control arm and the bushing 10. This means the bushing 10 plays an important role in realizing a high ride quality and a good handling of the vehicle.
The bushing 10 further comprises an intermediate member 20 having an elastic body 22.
The elastic body 22 is made of rubber and, thus, elastic in particular in relation to the outer member 12 and the inner member 16. The outer member 12 is supported on the inner member 16 via the elastic body 22. Thus, the bushing 10 is also referred to as a rubber bushing".
In order to realize a particularly high ride comfort as well as a particularly good handling of the vehicle, the intermediate member 20 is movably supported on the outer member 12 and movable in relation to the outer member 12 in the peripheral direction of the outer member 12. Figs. ito 4 show a first embodiment of the bushing 10. In said first embodiment, the intermediate member 20 is slidably supported on the outer member 12.
This means the bushing 10 according to the first embodiment comprises a mounting in the form of a slide bearing by means of which the intermediate member 20 is slidably supported on the outer member 12. The bushing 10 comprises rigid supporting members 26 which are arranged between the elastic body 22 and the outer member 12.
The supporting members 26 are rigid in relation to the elastic body 22 which is made of an elastic material. Said slide bearing has sliding contacts 24 between the outer member 12 and the supporting members 26.
The respective supporting members 26 each have at least one protrusion 28. The protrusions 28 of the supporting members 26 engage corresponding receptacles 30 of the elastic body 22. Moreover, the outer member 12 has protrusions 32 extending in the radial direction of the outer member 12 towards the middle. The protrusions 32 engage respective receptacles 34 of the supporting members 26.
With respect to conventional bushings, increasing the stiffness of the bushing in the transverse direction of the vehicle results in increasing the stiffness of the bushing in the longitudinal direction of the vehicle. For example, a combination of two different elastic materials having different stiffness values could be used to realize a high stiffness in the transverse direction and a low stiffness in the longitudinal direction of the vehicle.
Alternatively or additionally, a magneto-rheological bushing having a high stiffness in the transverse direction and a low stiffness in the longitudinal direction of the vehicle could be used. However, using a combination of two different elastic materials and/or using a magneto-rheological bushing is very expensive.
By movably supporting the intermediate member 20 on the outer member 12, the stiffness in the longitudinal direction of the vehicle can be decoupled from the stiffness in the transverse direction of the vehicle so that both a particularly high stiffness in the transverse direction of the vehicle and a particularly low stiffness in the longitudinal direction of the vehicle can be realized by means of the bushing 10. Thus, a particularly high ride quality as well as a particularly good handling of the vehicle can be realized by the bushing 10. Moreover, the stiffness in the vertical direction of the vehicle can be kept particularly low. For example, the vertical direction (z-direction) of the vehicle corresponds with the axial direction of the bushing 10, the axial direction of the bushing 10 being illustrated by a directional arrow 36.
The respective slant curved surface of 16 and the slant curved surface of supporting member A have an elastic member in between them. This sandwich of elastic material between curved slant surface of 16 and A respectively forms opposed curved surface which reduces stiffness in longitudinal direction. Thereby, the stiffness in the longitudinal direction can be kept particularly low. Simultaneously, the stiffness in the transverse direction can be increased. The opposed curved surfaces help retain a high stiffness in the transverse direction and the vertical direction and simultaneously reduce the stiffness in the longitudinal direction. The use of the sliding surfaces reduces the effective shear area contributing to a high stiffness in the longitudinal direction of the vehicle. Thus, by reducing the effective shear area the stiffness in the longitudinal direction can be reduced. Said sliding surfaces can act as stiffening members in the transverse direction of the vehicle so that a particularly high stiffness in the transverse direction can be realized. Thereby, the design of the bushing 10 allows for controlling the stiffness in the longitudinal direction independently from the stiffness in the transverse direction.
Said curved and sliding surfaces are formed by the protrusions 32 and the corresponding receptacles 34, the supporting members 26 being designed as supporting plates sliding on the curved protrusions 32 of the outer member 12 when loads act upon the bushing 10 in the longitudinal direction of the vehicle. When loads act upon the bushing 10 in the transverse direction of the vehicle, the same supporting plates (supporting members 26) act as stiffening members for the transverse direction. Since the supporting members 26 slide over the protrusions 28, the effective shear area which conventionally causes excessive stiffness in the longitudinal direction of the vehicle can be kept particularly low.
Fig. 5 serves to illustrate the working principle of the bushing 10. Fig. 5 shows two cylinders 38 and 40 having cylindrical inner peripheral surfaces 42 and 44. The cylindrical inner peripheral surfaces 42 and 44 are arranged one above the other and inclined at 45 degrees with respect to the horizontal 46. The lower cylinder 38 is constraint, wherein the upper cylinder 40 is free to move. This arrangement increases the stiffness in the transverse direction and the vertical direction, wherein the upper cylinder 40 is free to role on the lower constraint cylinder 38 in the longitudinal direction (x-direction). In Fig. 5, the longitudinal direction is designated with X. The vertical direction is designated with 7, and the transverse direction is designated with Y. Both cylindrical inner peripheral surfaces 42 and 44 are embedded in rubber. The cylindrical inner peripheral surfaces 42 and 44 are opposing curved cylindrical surfaces which help reduce the stiffness in the longitudinal direction and increase the stiffness in the transverse direction and the vertical direction.
Fig. 6 shows a second embodiment of the bushing 10. The vertical direction is illustrated by a directional arrow 36. The vertical direction of the vehicle corresponds with the axial direction of the bushing 10. The transverse direction of the vehicle is illustrated by a directional arrow 48. Moreover, the longitudinal direction of the vehicle is illustrated by a directional arrow 50.
In the second embodiment, the bushing 10 comprises roller bearings 52,54 and 56 by which the intermediate member 20, in particular the elastic body 22, is supported on the outer member 12 via the supporting members 26. The roller bearing 52 is configured as a radial roller bearing in the form of a radial thrust roller bearing. The roller bearing 54 is configured as a radial roller bearing in the form of a radial thrust roller bearing. This means the elastic body 22 is rotatably mounted on the outer member 12 in the radial direction of the outer member 12 by the roller bearings 52 and 54.
The roller bearing 56 is configured as an axial thrust bearing in the form of an axial thrust ball bearing via which the intermediate member 20, in particular the elastic body 22, is supported on the outer member 12 in the axial direction of the outer member 12. By using the roller bearings 52, 54 and 56, wearing of the bushing 10 can be kept particularly low.
Moreover, the bushing 10 is very robust and durable.
For example, the supporting members 26 are made of aluminium. Thus, the supporting members 26 act as aluminium supports. Thereby, excessive stiffness in the longitudinal direction can be avoided. Such excessive stiffness in the longitudinal direction conventionally results from a large area of rubber between the intermediate member 20 and the outer member 12 which is, for example, formed as an outer ring.
List of reference signs bushing 12 outer member 14 outer peripheral surface 16 inner member 18 through opening intermediate member 22 elastic body 24 sliding contact 26 supporting member 28 protrusion receptacle 32 protrusion 34 receptacle 36 directional arrow 38 cylinder cylinder 42 outer peripheral surface 44 outer peripheral surface 46 horizontal 48 directional arrow directional arrow X longitudinal direction Y transverse direction Z vertical direction

Claims (7)

  1. Claims A bushing (10) for a vehicle, the bushing (10) comprising an outer member (12), an inner member (16) arranged at least partially in the outer member (12), and an intermediate member (20) having at least one elastic body (22) for supporting the outer member (12) on the inner member (16), characterized in that the intermediate member (20) is movably supported on the outer member (12) and movable in relation to the outer member (12) in the peripheral direction of the outer member (12).
  2. 2. The bushing (10) according to claim 1, characterized in that the intermediate member (20) is slidably supported on the outer member (12).
  3. 3. The bushing (10) according to claim 1, the bushing (10) comprises at least one roller bearing (52, 54, 56) via which the intermediate member (20) is supported on the outer member (12).
  4. 4. The bushing (10) according to any one of the preceding claims, characterized in that the intermediate member (20) is supported on the outer member (12) via the elastic body (22).
  5. 5. The bushing (10) according to claim 4, characterized in that the bushing (10) comprises at least one rigid supporting member (26) via which the elastic body (22) is supported on the outer member (12).
  6. 6. The bushing (10) according to claim 5, characterized in that the supporting member (26) has at least one protrusion (28) engaging a corresponding receptacle (30) of the elastic body (22).
  7. 7. The bushing (10) according to any one of claims 5 or 6, characterized in that the outer member (12) has at least one protrusion (32) engaging a corresponding receptacle (34) of the supporting member (26).
GB1411495.3A 2014-06-27 2014-06-27 Bushing for a vehicle Withdrawn GB2516762A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1411495.3A GB2516762A (en) 2014-06-27 2014-06-27 Bushing for a vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1411495.3A GB2516762A (en) 2014-06-27 2014-06-27 Bushing for a vehicle

Publications (2)

Publication Number Publication Date
GB201411495D0 GB201411495D0 (en) 2014-08-13
GB2516762A true GB2516762A (en) 2015-02-04

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GB1411495.3A Withdrawn GB2516762A (en) 2014-06-27 2014-06-27 Bushing for a vehicle

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2534240A (en) * 2015-04-09 2016-07-20 Daimler Ag Bushing, in particular for a vehicle
CN110293803A (en) * 2019-05-20 2019-10-01 浙江吉利控股集团有限公司 A kind of torsion beam bushing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1065078A1 (en) * 1999-06-30 2001-01-03 Trelleborg Aktiebolag Bush
US20100327501A1 (en) * 2009-06-30 2010-12-30 Ford Global Technologies Llc Elastic bushing
DE102010005005A1 (en) * 2010-01-19 2011-07-21 Trelleborg Automotive Germany GmbH, 56203 Resilient bearing bush arrangement for use in landing gear of motor vehicle e.g. motor car, has bracing element that is provided for bracing the outer sleeve in recording element
WO2014055084A2 (en) * 2012-10-05 2014-04-10 Yusa Corporation Suspension bushing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1065078A1 (en) * 1999-06-30 2001-01-03 Trelleborg Aktiebolag Bush
US20100327501A1 (en) * 2009-06-30 2010-12-30 Ford Global Technologies Llc Elastic bushing
DE102010005005A1 (en) * 2010-01-19 2011-07-21 Trelleborg Automotive Germany GmbH, 56203 Resilient bearing bush arrangement for use in landing gear of motor vehicle e.g. motor car, has bracing element that is provided for bracing the outer sleeve in recording element
WO2014055084A2 (en) * 2012-10-05 2014-04-10 Yusa Corporation Suspension bushing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2534240A (en) * 2015-04-09 2016-07-20 Daimler Ag Bushing, in particular for a vehicle
CN110293803A (en) * 2019-05-20 2019-10-01 浙江吉利控股集团有限公司 A kind of torsion beam bushing

Also Published As

Publication number Publication date
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