WO2019155502A1 - Anti-roll system for vehicles - Google Patents

Anti-roll system for vehicles Download PDF

Info

Publication number
WO2019155502A1
WO2019155502A1 PCT/IT2019/050023 IT2019050023W WO2019155502A1 WO 2019155502 A1 WO2019155502 A1 WO 2019155502A1 IT 2019050023 W IT2019050023 W IT 2019050023W WO 2019155502 A1 WO2019155502 A1 WO 2019155502A1
Authority
WO
WIPO (PCT)
Prior art keywords
lever
roll system
hinged
pivotal axis
wheel assembly
Prior art date
Application number
PCT/IT2019/050023
Other languages
French (fr)
Inventor
Fabio FRATINI
Original Assignee
Fratini Fabio
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 Fratini Fabio filed Critical Fratini Fabio
Publication of WO2019155502A1 publication Critical patent/WO2019155502A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/026—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected transversally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/055—Stabiliser bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/80—Interactive suspensions; arrangement affecting more than one suspension unit
    • B60G2204/82—Interactive suspensions; arrangement affecting more than one suspension unit left and right unit on same axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/80—Interactive suspensions; arrangement affecting more than one suspension unit
    • B60G2204/83—Type of interconnection
    • B60G2204/8302—Mechanical

Definitions

  • the present invention relates to an anti-roll system for a vehicle.
  • US 2011/0309593 A1 describes a parallelogram of Watt fixed between the body of a vehicle and a pair of wheels.
  • a support structure installed under the body, has two longitudinal pivotal axes to each of which a lever is fixed.
  • a first lever has a side facing down and a side connected to the end of the corresponding side of the second lever.
  • Each lever side facing downwards is articulated in its lower end to a substantially horizontal rod connected, to its other end, to the suspension of a wheel.
  • the parallelogram of Watt is used to guide the vertical oscillation movement of the wheels with respect to the body with an exactly linear direction of action of the shock absorbers; furthermore, it prevents a lateral displacement of the body relative to the wheels under the effect of centrifugal force when the vehicle is steering.
  • US 2009/0309280 A1 discloses a suspension arrangement between the driver's cab of a heavy commercial vehicle and the chassis.
  • the suspension arrangement includes shock absorbers between the cab and the chassis to absorb stress and oscillations and, in addition, at least one scissor pantograph, used to reduce the freedom of movement of the cab with respect to the chassis.
  • the scissor pantograph is made of two centrally pivoted X-shaped rods. Each rod is connected on one side to the cab and on the other side to the chassis. The connections of each rod are hinged, but one of them comes with the interposition of an oscillating lever, articulated to the cab and, respectively, to the chassis. This oscillating lever is used to modify the verticality of the joint in the event of greater horizontal displacement between the cab and the chassis.
  • the main object of the present invention is to provide an elastic support structure, interposed between the wheels and the body of a car, maintaining the horizontality of the body both when the vehicle faces a curve, and when the plane of the roadway is inclined.
  • the present invention as defined in claim 1 attached to the present description, provides an anti-roll system for vehicle.
  • Figure 1 is a schematic rear view of a first embodiment of an anti- rolling system according to the invention applied to a vehicle;
  • Figure 2 is an enlarged central view of Figure 1 limited to the anti-roll system
  • Figure 3 is a top plan view of Figure 2;
  • Figure 4 is a rear view of a second embodiment of an anti-rolling system according to the invention.
  • Figure 5 is a view similar to Figure 1 of a variant of the anti-rolling system according to the invention.
  • Figure 6 is an enlarged view of a variant of Figure 2;
  • Figure 7 is an enlarged central section of Figure 5.
  • Figure 8 is an enlarged central section of the pivotal axis of Figure 7.
  • Figure 1 is a schematic rear view of a first embodiment of an anti-roll system according to the invention applied to a vehicle.
  • the body of a vehicle V is indicated with 1 , and with 2 a pair of wheels.
  • the system comprises a scissor pantograph 3 having two levers 4, 5 pivoted in a central pivotal axis 6.
  • Each lever 4, 5 has an end 7 articulated to the body 1 and the other end 8 articulated to a wheel assembly 9.
  • a shock absorber, generally indicated by 10, connects the end 8 of the lever 4, 5 articulated to the wheel assembly 9 with the end of the other lever 5, 4 articulated to the body 1 .
  • Each lever 4, 5 comprises two arms 11 , 12 having axes parallel and opposite to the central pivotal axis 6.
  • Each arm 1 1 , 12 contains a telescopic rod generically indicated by 13 in a cavity 14 adapted to receive it with the interposition of a spring 15.
  • the wheel assembly 9 comprises a hub-holder 16 on each wheel 2, and each lever 4, 5 has the end 8 articulated on the respective hub-holder 16.
  • Figures 2 and 3 are an enlarged central view of Figure 1 limited to the anti-roll system and a top plan view of Figure 2. It can be seen that the two levers 4, 5 are tapered at the pivotal axis 6 so that the parallel axes x, x' of the opposing arms 1 1 , 12 lie on the same plane.
  • FIG. 4 is a rear view of a second embodiment of an anti-roll system according to the invention.
  • the wheel assembly 9 comprises a rear bridge 17 for a pair of wheels 2.
  • Each lever 4, 5 has an end 8 articulated on the rear bridge 17 near the respective wheel 2.
  • each lever arm 11 , 12 has a cavity 14 adapted to receive the respective telescopic rod 13 with the interposition of a spring 15.
  • Each arm 4, 5 can be provided with an external reinforcement, not shown, to increase its rigidity.
  • FIG. 5 is a view similar to Figure 1 of a variant of the anti-roll system according to the invention.
  • the difference of this variant lies in a stabilizing plate, indicated as a whole with 18, comprising a base 19 to which two U-shaped elements are hung, generally indicated with 20.
  • Figure 7 is an enlarged central section of Figure 5.
  • the base 19 is fixed to a supporting structure of the body 1 , while the U- shaped elements 20 serve to limit the displacement of the pivotal axis 6 from one side and the other with respect to the vehicle centreline.
  • bearings 21 are provided in the pivotal axis 6 of the levers 4, 5 of the scissor pantograph 3 to facilitate their movement.
  • the bearings 21 are shown in detail in Figure 8, which is an enlarged central section of the pivotal axis of Figure 7.
  • the pivotal axis 6 is also provided with washers 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Body Structure For Vehicles (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Springs (AREA)

Abstract

An anti-roll system for vehicle (V) having a body (1) and at least one pair of wheels (2), the anti-roll system comprising a scissor pantograph (3) having two levers (4,5) pivoted on a central pivotal axis (6). Each lever (4,5) has one end (7) hinged to the body (1) and the other end (8) hinged to a wheel assembly (9), a shock absorber (10) connecting the end (8) of a lever (4, 5) hinged to the wheel assembly (9) with the end (7) of the other lever (5, 4) hinged to the body (1). Each lever (4,5) comprises two arms (11,12) having axes (x, x') that are parallel and opposite to the central pivotal axis (6), each arm (11,12) containing a spring-loaded telescopic rod (13).

Description

DESCRIPTION
The present invention relates to an anti-roll system for a vehicle.
US 2011/0309593 A1 describes a parallelogram of Watt fixed between the body of a vehicle and a pair of wheels. A support structure, installed under the body, has two longitudinal pivotal axes to each of which a lever is fixed.
A first lever has a side facing down and a side connected to the end of the corresponding side of the second lever. Each lever side facing downwards is articulated in its lower end to a substantially horizontal rod connected, to its other end, to the suspension of a wheel. The parallelogram of Watt is used to guide the vertical oscillation movement of the wheels with respect to the body with an exactly linear direction of action of the shock absorbers; furthermore, it prevents a lateral displacement of the body relative to the wheels under the effect of centrifugal force when the vehicle is steering. The parallelogram of Watt described by US 2011/0309593 A1 has the drawback that a shortening of the suspension of a wheel does not implicate an identical extension of the suspension of the other wheel, because each lever has three points of articulation: one with the supporting structure, one with the other lever and one with the rod connected to the wheel suspension. This entails an unforeseeable change of balance of the vehicle body while driving.
US 2009/0309280 A1 discloses a suspension arrangement between the driver's cab of a heavy commercial vehicle and the chassis. The suspension arrangement includes shock absorbers between the cab and the chassis to absorb stress and oscillations and, in addition, at least one scissor pantograph, used to reduce the freedom of movement of the cab with respect to the chassis.
The scissor pantograph is made of two centrally pivoted X-shaped rods. Each rod is connected on one side to the cab and on the other side to the chassis. The connections of each rod are hinged, but one of them comes with the interposition of an oscillating lever, articulated to the cab and, respectively, to the chassis. This oscillating lever is used to modify the verticality of the joint in the event of greater horizontal displacement between the cab and the chassis.
The purpose of the suspension arrangement according to US 2009/0309280 A1 is to keep the cab and the chassis always parallel to each other, to a first approximation. In fact, the modification of the vertical distance between the end points of the oscillating levers emerges only in the case of a greater vertical deviation between the cab and the chassis; in this case there would be a relative rotation movement, even if minimal, between the two, but of no practical relevance.
The main object of the present invention, instead, is to provide an elastic support structure, interposed between the wheels and the body of a car, maintaining the horizontality of the body both when the vehicle faces a curve, and when the plane of the roadway is inclined. To achieve the aforementioned aim, the present invention, as defined in claim 1 attached to the present description, provides an anti-roll system for vehicle.
Further characteristics and advantages of the invention will become clearer from the description of the embodiments of the anti-roll system for the vehicle in question, illustrated by way of a non-limiting example in the accompanying drawings, in which:
Figure 1 is a schematic rear view of a first embodiment of an anti- rolling system according to the invention applied to a vehicle;
Figure 2 is an enlarged central view of Figure 1 limited to the anti-roll system;
Figure 3 is a top plan view of Figure 2;
Figure 4 is a rear view of a second embodiment of an anti-rolling system according to the invention;
Figure 5 is a view similar to Figure 1 of a variant of the anti-rolling system according to the invention;
Figure 6 is an enlarged view of a variant of Figure 2;
Figure 7 is an enlarged central section of Figure 5; and
Figure 8 is an enlarged central section of the pivotal axis of Figure 7. First of all, reference is made to Figure 1 which is a schematic rear view of a first embodiment of an anti-roll system according to the invention applied to a vehicle. In it, the body of a vehicle V is indicated with 1 , and with 2 a pair of wheels. The system comprises a scissor pantograph 3 having two levers 4, 5 pivoted in a central pivotal axis 6. Each lever 4, 5 has an end 7 articulated to the body 1 and the other end 8 articulated to a wheel assembly 9. A shock absorber, generally indicated by 10, connects the end 8 of the lever 4, 5 articulated to the wheel assembly 9 with the end of the other lever 5, 4 articulated to the body 1 . Each lever 4, 5 comprises two arms 11 , 12 having axes parallel and opposite to the central pivotal axis 6. Each arm 1 1 , 12 contains a telescopic rod generically indicated by 13 in a cavity 14 adapted to receive it with the interposition of a spring 15.
In this first embodiment the wheel assembly 9 comprises a hub-holder 16 on each wheel 2, and each lever 4, 5 has the end 8 articulated on the respective hub-holder 16.
Refer to Figures 2 and 3, which are an enlarged central view of Figure 1 limited to the anti-roll system and a top plan view of Figure 2. It can be seen that the two levers 4, 5 are tapered at the pivotal axis 6 so that the parallel axes x, x' of the opposing arms 1 1 , 12 lie on the same plane.
Refer to Figure 4 which is a rear view of a second embodiment of an anti-roll system according to the invention. Unlike the first embodiment, the wheel assembly 9 comprises a rear bridge 17 for a pair of wheels 2. Each lever 4, 5 has an end 8 articulated on the rear bridge 17 near the respective wheel 2.
In both embodiments described above, each lever arm 11 , 12 has a cavity 14 adapted to receive the respective telescopic rod 13 with the interposition of a spring 15.
Each arm 4, 5 can be provided with an external reinforcement, not shown, to increase its rigidity.
Reference is now made to Figure 5 which is a view similar to Figure 1 of a variant of the anti-roll system according to the invention. The difference of this variant lies in a stabilizing plate, indicated as a whole with 18, comprising a base 19 to which two U-shaped elements are hung, generally indicated with 20.
This is also shown in Figure 7 which is an enlarged central section of Figure 5. The base 19 is fixed to a supporting structure of the body 1 , while the U- shaped elements 20 serve to limit the displacement of the pivotal axis 6 from one side and the other with respect to the vehicle centreline.
As shown in Figure 6, which is an enlarged view of a variant of Figure 2, bearings 21 are provided in the pivotal axis 6 of the levers 4, 5 of the scissor pantograph 3 to facilitate their movement. The bearings 21 are shown in detail in Figure 8, which is an enlarged central section of the pivotal axis of Figure 7. The pivotal axis 6 is also provided with washers 22.
It should be understood that the embodiments shown are only constructive examples of the anti-roll system according to the invention, the extent of which is defined in the appended claims.

Claims

1. An anti-roll system for vehicle (V) having a body (1 ) and at least one pair of wheels (2), the anti-roll system comprising a scissor pantograph (3) having two levers (4, 5) pivotaled on a central pivotal axis (6), each lever (4,
5) having one end (7) hinged to the body (1 ) and the other end (8) hinged to a wheel assembly (9), a shock absorber (10) connecting the end (8) of a lever (4, 5) hinged to the wheel assembly (9) with the end (7) of the other lever (5,
4) hinged to the body (1 ), characterized in that each lever (4, 5) comprises two arms (11 , 12) having axes (x, x') that are parallel and opposite to the central pivotal axis (6), each arm (11 , 12) containing a spring loaded telescopic rod (13).
2. The anti-roll system according to claim 1 , wherein each wheel assembly (9) comprises a hub-holder (16) on each wheel (2), and each lever (4, 5) has the end (8) hinged to the respective hub-holder (16).
3. The anti-roll system according to claim 1 , wherein each wheel assembly (9) comprises a rear axle housing (17) for a pair of wheels (2), and each lever (4, 5) has an end hinged to the rear axle housing (17) near the respective wheel (2).
4. The anti-roll system according to claim 1 , wherein the two levers (4, 5) pivotaled on the scissor pantograph (3) are tapered at the pivotal axis (6) so that the parallel axes (x, x') of the opposite arms (11 , 12) lie on the same plane.
5. The anti-roll system according to claim 1 , wherein each arm (11 , 12) has a cavity (14) adapted to receive the respective telescopic rod (13) with the interposition of a spring (15).
6. The anti-roll system according to claim 1 , wherein a stabilizing plate (18) comprises a base (19) fixed to a load-bearing structure of the body (1 ), base (19) to which two U-shaped elements (20) are hung for limiting a displacement of the pivotal axis (6) on one side and on the other with respect to a vehicle centerline.
7. The anti-roll system according to claim 1 , wherein bearings (21 ) are provided in the pivotal axis (6) of the levers (4, 5) of the scissor pantograph (3) to facilitate the lever movement.
PCT/IT2019/050023 2018-02-08 2019-01-31 Anti-roll system for vehicles WO2019155502A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000002490 2018-02-08
IT201800002490A IT201800002490A1 (en) 2018-02-08 2018-02-08 Anti-roll system for vehicle

Publications (1)

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WO2019155502A1 true WO2019155502A1 (en) 2019-08-15

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WO (1) WO2019155502A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE537269C (en) * 1931-01-15 1931-10-31 Hans Grupe Device, especially for motor vehicles, for holding the carriage frame in a position parallel to the wheel axis
US4079954A (en) * 1975-05-23 1978-03-21 Roy Komarnicki Stabilizing assembly for camper attachments and the like to trucks
US20070267894A1 (en) * 2005-05-19 2007-11-22 Van Den Brink Joel D Lateral control rod for a cab suspension system
US20090309280A1 (en) 2005-06-29 2009-12-17 Zf Friedrichshafen Ag Suspension means with scissor pantograph
US20110309593A1 (en) 2010-06-15 2011-12-22 GM Global Technology Operations LLC Vehicle and watt's linkage therefor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE537269C (en) * 1931-01-15 1931-10-31 Hans Grupe Device, especially for motor vehicles, for holding the carriage frame in a position parallel to the wheel axis
US4079954A (en) * 1975-05-23 1978-03-21 Roy Komarnicki Stabilizing assembly for camper attachments and the like to trucks
US20070267894A1 (en) * 2005-05-19 2007-11-22 Van Den Brink Joel D Lateral control rod for a cab suspension system
US20090309280A1 (en) 2005-06-29 2009-12-17 Zf Friedrichshafen Ag Suspension means with scissor pantograph
US20110309593A1 (en) 2010-06-15 2011-12-22 GM Global Technology Operations LLC Vehicle and watt's linkage therefor

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Publication number Publication date
IT201800002490A1 (en) 2019-08-08

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