GB2027650A - Creation of Inventions and Patents with Artificial Intelligence

GB2027650A – Resilient suspension for the cab of an agricultural tractor
– Google Patents

GB2027650A – Resilient suspension for the cab of an agricultural tractor
– Google Patents
Resilient suspension for the cab of an agricultural tractor

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Info

Publication number
GB2027650A

GB2027650A
GB7924279A
GB7924279A
GB2027650A
GB 2027650 A
GB2027650 A
GB 2027650A
GB 7924279 A
GB7924279 A
GB 7924279A
GB 7924279 A
GB7924279 A
GB 7924279A
GB 2027650 A
GB2027650 A
GB 2027650A
Authority
GB
United Kingdom
Prior art keywords
suspension
cab
vehicle
cross
shock absorber
Prior art date
1978-08-11
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.)

Granted

Application number
GB7924279A
Other versions

GB2027650B
(en

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.)

Centro Ricerche Fiat SCpA

Original Assignee
Centro Ricerche Fiat SCpA
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.)
1978-08-11
Filing date
1979-07-12
Publication date
1980-02-27

1979-07-12
Application filed by Centro Ricerche Fiat SCpA
filed
Critical
Centro Ricerche Fiat SCpA

1980-02-27
Publication of GB2027650A
publication
Critical
patent/GB2027650A/en

1982-06-16
Application granted
granted
Critical

1982-06-16
Publication of GB2027650B
publication
Critical
patent/GB2027650B/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

239000000725
suspension
Substances

0.000
title
claims
description
46

239000006096
absorbing agent
Substances

0.000
claims
description
20

230000035939
shock
Effects

0.000
claims
description
20

230000010355
oscillation
Effects

0.000
claims
description
7

238000005096
rolling process
Methods

0.000
claims
description
7

230000005540
biological transmission
Effects

0.000
description
1

238000013016
damping
Methods

0.000
description
1

238000006073
displacement reaction
Methods

0.000
description
1

239000002184
metal
Substances

0.000
description
1

230000000284
resting effect
Effects

0.000
description
1

Classifications

B—PERFORMING OPERATIONS; TRANSPORTING

B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS

B62D—MOTOR VEHICLES; TRAILERS

B62D33/00—Superstructures for load-carrying vehicles

B62D33/06—Drivers’ cabs

B62D33/0604—Cabs insulated against vibrations or noise, e.g. with elastic suspension

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC

Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10S180/00—Motor vehicles

Y10S180/90—Argicultural-type tractors

Description

1
GB 2 027 650 A 1
SPECIFICATION
Resilient suspension for the cab of an agricultural tractor
The present invention relates to resilient 5 suspensions for the cabs of vehicles such as agricultural tractors.
More particularly, the invention is concerned with a resilient suspension for the cab of an agricultural tractor of the type having a body and a 10 cab delimited by a rigid frame supported from the body by the suspension.
The object of the present invention is to provide a resilient suspension for the cab of a vehicle such as an agricultural tractor which ensures sufficient 15 driver comfort, when the tractor is used on rough ground, to permit the forward speed of the tractor to be increased beyond that tolerated with previous cab suspensions. It is envisaged that the invention will have particular utility in tractors of 20 the type having crawler tracks.
According to the present invention there is provided a resilient suspension for the cab of a vehicle of the aforesaid type, characterised in that the suspension includes respective front and rear 25 transverse suspension structures, each of which comprises two struts formed by respective leaf springs upstanding from the vehicle body disposed substantially in longitudinal planes when relaxed, and interconnected by a cross member formed by 30 a leaf spring lying when relaxed in a plane which is perpendicular to the planes of the two struts and parallel to the longitudinal axis of the vehicle, and shock absorber means to damp rolling and pitching oscillations of the cab, relative to the 35 vehicle body, due to the flexural resilience of said suspension structures.
The use of the spring suspension structures at the front and rear of the cab in accordance with the invention gives a smooth ride even when the 40 vehicle is operating on rough terrain.
One embodiment of the invention will now be more particularly described, by way of example, with reference to the accompanying drawings, in which:
4$ Figure 1 is a longitudinal sectional view of an agricultural tractor provided with a resilient suspension according to the present invention, for the driver’s cab;
Figure 2 is a section taken along the line II—II ; 50 of Figure 1, and
Figure 3 is a view in the direction of arrow III in Figure 2.
Referring now to the drawings, there is shown, in broken outline, the upper part of the body 1 of a 55 tracked agricultural tractor mounting a platform 2 which supports a driver’s cab 3 delimited by a rigid frame 4. A resilient suspension is interposed between the platform 2 and the driver’s cab 3 and will now be described in detail.
60 Mounted on the platform 2, to the front and rear of the driver’s cab 3, are respective transverse, suspension structures 5, each comprising two upstanding struts 6 and a cross member 9. The struts 6 and the cross members 9
are formed by respective leaf springs which, when relaxed as shown in Figure 3, lie in vertical longitudinal planes and horizontal planes, respectively. The terms ‘vertical’ and ‘horizontal’ are used herein to refer to orientations when the tractor is resting on a horizontal surface, as shown in the drawings.
The cross members 9 are articulated at each end to a respective bush 8 which is carried by a support 7 at the upper end of each strut 6. Each cross member 9 is provided with a central bracket 10 supporting a respective pivot pin 11, the axis of which is perpendicular to the longitudinal plane of symmetry of the tractor. Respective forked supports 20 are fixed to the front and rear of the cab frame 4, each forked support 20 being articulated to a respective cross member 9 by a respective pivot pin 11.
A pair of first hydraulic, telescopic shock absorbers 12 are located adjacent each suspension structure 5, as shown in Figure 3. The two shock absorbers 12 of each pair of inclined so that their longitudinal axes converge downwardly towards the longitudinal plane of symmetry of the tractor. Each shock absorber 12 is articulated at its upper end 12a to the cab frame 4, and at its lower end 12b to the tractor body at one of a plurality of articulation points defined by holes 13 which are arranged in an arc of a circle, the centre of which corresponds to the articulation point of the upper end 12a of the shock absorber 12. The inclination of the longitudinal axis of each shock absorber 12 can be varied relative to the longitudinal plane of symmetry of the tractor by articulating its lower end 12b at different respective holes 13.
A rigid transverse support structure, comprising two struts 14 and a cross member 15, is mounted at the front and rear of the platform 2 adjacent each resilient suspension structure 5. The rigid struts 14 and cross members 15 are formed by shaped metal sections which are rigidly interconnected at their ends. Each cross member 15 is provided with a respective support 20 which supports one end 166 of a respective second hydraulic telescopic shock absorber 16. Each shock absorber 16 is arranged with its axis slightly inclined to the horizontal and is articulated at its other end 16a to the cab frame 4. The second shock absorbers 16 are mounted at the front and. rear of the cab 3 respectively.
An elastomeric stop 17 is fixed to the upper end of each rigid strut 14, and a bracket 18 with an elastomeric stop 19 is fitted to the cab. frame 4 above each end of the cross members 9 of the suspension structures 5.
The resilient suspension described above provides a high degree of comfort for the driver, even when the tractor is driven over very rough ground. In fact, the leaf springs forming the cross members 9 enable the cab frame 4 to provide a resilient response to both rolling and pitching movements.
The struts 6 of the suspension structures 5, as well as supporting the whole of the cab 3 and m
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GB 2 027 650 A 2
conferring a degree of transverse resilience, also perform the function normally fulfilled by the suspension links of conventional leaf springs. The resilience of struts 6 enables considerable relative 5 movement of the articulation bushes 8 of the cross-members 9 when the cross-members undergo a large degree of flexing.
The second shock absorbers 16 damp rolling the oscillations of the cab 3, and the first shock 1 o absorbers 12, in addition to damping the pitching oscillations, also damp the rolling oscillations, of the cab 3, thereby preventing excessive L-shaped deformation or buckling of the leaf-springs forming the cross members 9. The relative 15 displacements between the cab frame 4 and the tractor body 1, particularly the amplitude of the rolling and pitching oscillations, are limited by the stop pads 17,19.
It will be appreciated from the preceding 20 description that, since the cab 3 is articulated to the tractor body 1, it is necessary to use flexible transmission means to connect the various controls in the cab 3 with their respective actuators in the tractor. Thus, for example, the 25 hand brake and the accelerator are operated by flexible cables, while other controls may be operated hydraulically.
A driver’s comfort may be further increased by providing a sprung seat, so that the suspension 30 described above damp stresses of a small amplitude while the seat springs damp stresses of a greater amplitude.

Claims (13)

1. A resilient suspension for the cab of a vehicle 35 such as an agricultural tractor having a body and a cab delimited by a rigid frame supported from the body by the suspension in which the suspension includes respective front and rear transverse suspension structures, each of which comprises 40 two struts, formed by respective leaf springs upstanding form the vehicle body disposed substantially in longitudinal planes when relaxed, . and interconnected by a cross member formed by a leaf spring lying when relaxed in a plane which is 45 perpendicular to the planes of the two struts and parallel to the longitudinal axis of the vehicle, and shock absorber means to damp rolling and pitching oscillations of the cab, relative to the vehicle body due to the flexural resilience of said 50 suspension structures.

2. A suspension as claimed in Claim 1, in which the cross-member of each suspension structure is articulated at each end to a respective said strut.

3. A suspension as claimed in Claim 2, in which 55 the cross-member of each suspension structure supports centrally a pin for pivotal connection to the cab, the axis of the pin being perpendicular to the longitudinal plane of symmetry of the vehicle, when the cross-member is relaxed.

4. A suspension as claimed in Claim 1, in which each suspension structure is mounted on a platform which is fixed to the vehicle body.

5. A suspension as claimed in Claim 1, in which the shock absorber means include two pairs of first telescopic hydraulic shock absorbers, each pair being adjacent a respective suspension structure, the shock absorbers of each pair being so inclined that their longitudinal axes converge downwardly towards the longitudinal plane of symmetry of the vehicle, each shock absorber being articulated at its upper end to the cab frame and at its lower end to the vehicle body.

6. A suspension as claimed in Claim 5, in which the first shock absorbers are provided with respective means adjacent their lower ends to enable the inclination of their respective longitudinal axes to be varied relative to each other.

7. A suspension as claimed in Claim 1, in which the vehicle body supports a rigid transverse support structure adjacent each suspension structure, each rigid structure comprising two struts and a cross member and including second shock absorber means comprising two telescopic hydraulic shock absorbers arranged with their axes substantially perpendicular to the longitudinal plane of symmetry of the vehicle, each shock absorber being articulated at respective ends to the cab frame and the cross member of a respective rigid support structure.

8. A suspension as claimed in Claim 1, in which stop elements are provided to limit the amplitude of the rolling and pitching oscillations of the cab relative to the vehicle body.

9. A suspension as claimed in Claim 8, in which the stop elements comprise elastomeric pads.

10. A suspension as claimed in Claim 9, in which the cafr frame is provided with four stop pads, the pads being located above respective ends of the cross members of the suspension structures.

11. A suspension as claimed in Claim 9, in which each strut of the rigid support structures is provided at its upper end with a stop pad which abuts a respective strut of the adjacent suspension structure upon a predetermined deflection of said strut.

12. A suspension for the cab of a vehicle such as an agricultural tractor, substantially as herein described with reference to, and as shown in, the accompanying drawings.

13. A tractor having a body and a cab delimited by a rigid frame supported from the body by a suspension as claimed in any of the preceding claims.
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Printed for Her Majesty’s Stationery Office by the Courier Press, Leamington Spa, 1980. Published by the Patent Office, 25 Southampton Buildings, London, WC2A 1 AY, from which copies may be obtained.

GB7924279A
1978-08-11
1979-07-12
Resilient suspension for the cab of an agricultural tractor

Expired

GB2027650B
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

IT68895/78A

IT1108567B
(en)

1978-08-11
1978-08-11

MECHANICAL ELASTIC SUSPENSION FOR THE DRIVER’S CAB OF AN AGRICULTURAL TRACTOR

Publications (2)

Publication Number
Publication Date

GB2027650A
true

GB2027650A
(en)

1980-02-27

GB2027650B

GB2027650B
(en)

1982-06-16

Family
ID=11310850
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB7924279A
Expired

GB2027650B
(en)

1978-08-11
1979-07-12
Resilient suspension for the cab of an agricultural tractor

Country Status (9)

Country
Link

US
(1)

US4275918A
(en)

JP
(1)

JPS5527590A
(en)

DE
(2)

DE2931405A1
(en)

ES
(1)

ES482781A1
(en)

FR
(1)

FR2432966A1
(en)

GB
(1)

GB2027650B
(en)

IT
(1)

IT1108567B
(en)

NL
(1)

NL7905453A
(en)

SE
(1)

SE7906635L
(en)

Cited By (5)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

FR2583012A1
(en)

1985-06-07
1986-12-12
Renault Vehicules Ind
Device for suspending a driver’s cab on a vehicle chassis with auxiliary chassis

EP0213098A2
(en)

1985-08-21
1987-03-04
Saab-Scania Aktiebolag
Arrangement for suspending a forwardly tippable cab on a vehicle

EP0410680A2
(en)

1989-07-25
1991-01-30
Applied Power Inc.
An improved vibration dampening suspension device for the cab of a truck vehicle

US5109939A
(en)

1989-07-25
1992-05-05
Richard Conaway
Vibration dampening suspension device for the cab of a truck vehicle

US5253853A
(en)

1992-09-15
1993-10-19
Applied Power Inc.
Vibration dampening device

Families Citing this family (19)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

FR2675456B1
(en)

1991-04-18
1993-07-30
Renault Agriculture Sa

AGRICULTURAL TRACTOR EQUIPPED WITH LOW FREQUENCY SUSPENSION.

US5553911A
(en)

1994-12-15
1996-09-10
Volvo Gm Heavy Truck Corporation
Heavy duty motor vehicle cab suspension

DE864050T1
(en)

1996-10-02
1999-05-06
Neway Anchorlok Int Inc

ROD DEVICE WITH VARIABLE GEOMETRY

US6454294B1
(en)

1998-07-14
2002-09-24
Miller St. Nazianz
High clearance vehicle

JP4535599B2
(en)

2000-11-01
2010-09-01
株式会社小松製作所

Construction vehicle cab support device

DE102004018646A1
(en)

2004-04-16
2005-11-10
Liebherr-Werk Nenzing Gmbh, Nenzing

Industrial truck

US7300100B2
(en)

2004-10-21
2007-11-27
Cnh America Llc
Windrower cab mounting and suspension system

DE102009020305A1
(en)

2008-05-26
2009-12-03
Ksm Castings Gmbh

Axle carrier for motor vehicles

WO2012142560A2
(en)

2011-04-14
2012-10-18
Vermeer Manufacturing Company
Cab suspension for a machine adapted to surface excavate rock or like materials

US8807633B2
(en)

2011-06-21
2014-08-19
Cnh Industrial America Llc
Cab suspension system for an off-road vehicle

DE102012200670A1
(en)

2012-01-18
2013-07-18
Zf Friedrichshafen Ag

Cab suspension system with roll stabilization

KR20150071231A
(en)

2013-12-18
2015-06-26
현대자동차주식회사
Vehicle having shock absorber mounting angle variation structure

US9216778B1
(en)

2014-06-02
2015-12-22
International Truck Intellectual Property Company, Llc
Cab suspension

US10343729B2
(en)

2017-10-02
2019-07-09
Cnh Industrial America Llc
Suspension system for a work vehicle

US10668954B2
(en)

2017-11-30
2020-06-02
John Payne
Cab and hood suspension with hood tilt

US10745065B2
(en)

2018-04-16
2020-08-18
Howe & Howe Inc.
Vehicle with pneumatically suspended operator compartment

US10752298B2
(en)

2018-08-31
2020-08-25
Cnh Industrial America Llc
Vibration dampening system for a work vehicle with elastomeric dampers

US10710645B2
(en)

2018-08-31
2020-07-14
Cnh Industrial America Llc
Vibration dampening system for a work vehicle with chassis dampers

US10960936B2
(en)

2018-08-31
2021-03-30
Cnh Industrial America Llc
Vibration dampening system for a work vehicle with cab dampers

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Publication date
Assignee
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US1952718A
(en)

1929-09-26
1934-03-27
Chrysler Corp
Spring suspension

US1934892A
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1932-07-14
1933-11-14
Chrysler Corp
Spring mounting

US3041086A
(en)

1954-05-11
1962-06-26
Walker Brooks
Cable connected auxiliary vehicle suspension

US3120962A
(en)

1960-10-31
1964-02-11
Gen Motors Corp
Clearance height control system

AT285343B
(en)

1965-10-22
1970-10-27
Sune Torsten Ing Henriksson

Supporting the driver’s cab of a motor vehicle

DE1555946B2
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Kloeckner-Humboldt-Deutz Ag, 5000 Koeln

Work vehicle, especially tractor

US3800896A
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1973-04-19
1974-04-02
Zeal Corp
Shock absorber mount for vehicles with skis

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1974-06-20
1975-05-13
Sgl Ind Inc
Vehicle roll-over protection device

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1976-03-16
Ford Motor Company
Suspension for truck cab

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Massey-Ferguson Inc.
Tractor cab and safety frame mounting

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1976-02-06
1977-08-11
Toyoda Autom Loom Works Ltd
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1976-08-19
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United States Steel Corporation
Vehicle wheel suspension assembly

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1976-10-05
1978-05-11
Daimler Benz Ag

PASSENGER CARS

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1977-02-26
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Daimler-Benz Ag, 7000 Stuttgart

Spring system for the driver’s cab of a commercial vehicle with seats for occupants

DE2717661C2
(en)

1977-04-21
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Daimler-Benz Ag, 7000 Stuttgart

Front unit for trucks

DE2726034A1
(en)

1977-06-08
1978-12-14
Fritzmeier Ag
Dynamically stabilised tractor cab – is mounted on central universal joint which has sliding section for vertical movements, and damping springs at edges

DE2730139C3
(en)

1977-07-04
1983-04-07
Fritzmeier AG, 5036 Oberentfelden

Spring support for a driver’s cab

SE407923B
(en)

1977-09-21
1979-04-30
Mining Transportation Co Ab

DEVICE FOR SPRINGING SUSPENSION OF A STEERING CABIN SEPARATED BY HEAVY WORK VEHICLES

1978

1978-08-11
IT
IT68895/78A
patent/IT1108567B/en
active

1979

1979-07-05
US
US06/054,764
patent/US4275918A/en
not_active
Expired – Lifetime

1979-07-12
NL
NL7905453A
patent/NL7905453A/en
not_active
Application Discontinuation

1979-07-12
GB
GB7924279A
patent/GB2027650B/en
not_active
Expired

1979-07-24
ES
ES482781A
patent/ES482781A1/en
not_active
Expired

1979-08-02
DE
DE19792931405
patent/DE2931405A1/en
not_active
Ceased

1979-08-02
DE
DE19797922136U
patent/DE7922136U1/en
not_active
Expired

1979-08-07
SE
SE7906635A
patent/SE7906635L/en
not_active
Application Discontinuation

1979-08-10
FR
FR7920550A
patent/FR2432966A1/en
active
Granted

1979-08-10
JP
JP10272479A
patent/JPS5527590A/en
active
Pending

Cited By (7)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

FR2583012A1
(en)

1985-06-07
1986-12-12
Renault Vehicules Ind
Device for suspending a driver’s cab on a vehicle chassis with auxiliary chassis

EP0213098A2
(en)

1985-08-21
1987-03-04
Saab-Scania Aktiebolag
Arrangement for suspending a forwardly tippable cab on a vehicle

EP0213098A3
(en)

1985-08-21
1987-09-09
Saab-Scania Aktiebolag
Arrangement for suspending a forwardly tippable cab on a vehicle

EP0410680A2
(en)

1989-07-25
1991-01-30
Applied Power Inc.
An improved vibration dampening suspension device for the cab of a truck vehicle

EP0410680A3
(en)

1989-07-25
1991-08-21
Richard L. Conaway
An improved vibration dampening suspension device for the cab of a truck vehicle

US5109939A
(en)

1989-07-25
1992-05-05
Richard Conaway
Vibration dampening suspension device for the cab of a truck vehicle

US5253853A
(en)

1992-09-15
1993-10-19
Applied Power Inc.
Vibration dampening device

Also Published As

Publication number
Publication date

DE2931405A1
(en)

1980-02-14

DE7922136U1
(en)

1981-03-26

IT1108567B
(en)

1985-12-09

US4275918A
(en)

1981-06-30

NL7905453A
(en)

1980-02-13

IT7868895D0
(en)

1978-08-11

JPS5527590A
(en)

1980-02-27

FR2432966B1
(en)

1982-07-02

GB2027650B
(en)

1982-06-16

SE7906635L
(en)

1980-02-12

FR2432966A1
(en)

1980-03-07

ES482781A1
(en)

1980-03-01

Contact information