WO2009103642A1 - Steering and braking pedal arrangement for tractors - Google Patents

Steering and braking pedal arrangement for tractors Download PDF

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Publication number
WO2009103642A1
WO2009103642A1 PCT/EP2009/051572 EP2009051572W WO2009103642A1 WO 2009103642 A1 WO2009103642 A1 WO 2009103642A1 EP 2009051572 W EP2009051572 W EP 2009051572W WO 2009103642 A1 WO2009103642 A1 WO 2009103642A1
Authority
WO
WIPO (PCT)
Prior art keywords
pedal
ast
arrangement
pedal arrangement
brake
Prior art date
Application number
PCT/EP2009/051572
Other languages
French (fr)
Inventor
Franco Mazzucchi
Eugenio Sereni
Roberto Mazzucchi
Original Assignee
Cnh Italia Spa
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 Cnh Italia Spa filed Critical Cnh Italia Spa
Priority to RU2010138819/11A priority Critical patent/RU2482987C2/en
Priority to BRPI0907517-8A priority patent/BRPI0907517B1/en
Priority to JP2010547149A priority patent/JP5405495B2/en
Priority to US12/918,630 priority patent/US8827048B2/en
Priority to CN200980105910.3A priority patent/CN101945785B/en
Publication of WO2009103642A1 publication Critical patent/WO2009103642A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/20—Tandem, side-by-side, or other multiple master cylinder units
    • B60T11/21—Tandem, side-by-side, or other multiple master cylinder units with two pedals operating on respective circuits, pressures therein being equalised when both pedals are operated together, e.g. for steering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
    • B62D11/001—Steering non-deflectable wheels; Steering endless tracks or the like control systems
    • B62D11/006—Mechanical control systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
    • B62D11/02—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides
    • B62D11/06—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source
    • B62D11/08—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using brakes or clutches as main steering-effecting means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/30—Controlling members actuated by foot
    • G05G1/36—Mounting units comprising an assembly of two or more pedals, e.g. for facilitating mounting
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20012—Multiple controlled elements
    • Y10T74/20189—Foot operated
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20528—Foot operated
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20888—Pedals

Definitions

  • the present invention relates to a steering and braking pedal arrangement for tractors .
  • Conventional tractors are equipped with a steer-by- braking pedal arrangement, normally comprising two brake pedals enabling a so-called steer-by-braking function (SBF) .
  • SBF steer-by-braking function
  • the two brake pedals simply have a driver-operated mechanical lock device for integrally connecting the pedals for on-road use or when the SBF is not required.
  • the mechanical lock should always be used when running on-road, to safeguard against the driver inadvertently pressing only one of the two pedals when the tractor is running at high speed, thus resulting in sharp swerving or even capsizing of the vehicle.
  • the two brake pedals are connected integrally by the lock device, and can only be pressed simultaneously to slow down or stop the vehicle as a whole.
  • the driver may neglect to activate the lock device to connect the two brake pedals integrally before the vehicle gets up to speed, thus resulting, as stated, in highly dangerous situations in the event of emergency braking (swerving of the vehicle at high speed, if only one pedal is pressed) ; (2) using current systems, the steer-by-braking function (SBF) cannot be applied effectively to electronic (e.g. ABS) brake systems.
  • SBF steer-by-braking function
  • Figure 1 shows a front view of a pedal arrangement in accordance with the present invention
  • Figure 2 shows a rear view of the Figure 1 pedal arrangement
  • Figure 3 shows a plan view of a first configuration of the Figure 1 and 2 pedal arrangement
  • Figure 4 shows a plan view of a second configuration of the Figure 1 and 2 pedal arrangement.
  • Figure 1 is to a different scale from the other drawings.
  • Number 10 in the attached drawings indicates as a whole a pedal arrangement, for a tractor (not shown) , in accordance with the present invention.
  • Pedal arrangement 10 comprises a central brake pedal 11 connected to a right side pedal 12 and a left side pedal 13.
  • Right side pedal 12 and left side pedal 13 are connected to central brake pedal 11 by respective hinges HNl and HN2.
  • Central pedal 11 provides for actually acting on the master cylinder (not shown) of the brake system (not shown) and so producing the desired braking action, whereas right side pedal 12, when foot-operated by the driver (not shown) , generates an activating signal informing the control system of the driver's intention to activate the rightward steer-by-braking function.
  • the tractor's electronic system therefore only activates the brake of the rear right wheel (not shown) of the vehicle.
  • left side pedal 13 which, when foot-operated by the driver, generates a signal to only activate the rear left brake.
  • right side pedal 12 has a projection 12a, to which a connecting rod 12c is hinged by an articulated joint 12b.
  • Connecting rod 12c comprises a fork-shaped first portion 12c* ( Figure 2); and a second portion 12c** formed in one piece with first portion 12c* and in the form of an internally threaded sleeve.
  • a bolt head 12c*** is provided at one end of second portion 12c**.
  • a connecting rod 13c of left pedal 13 has the same parts.
  • connecting rod 13c For the sake of simplicity, the parts of connecting rod 13c are not described, but are numbered accordingly in the attached drawings .
  • a device 14 between connecting rods 12c and 13c provides for substantially disabling rotation of one of side pedals 12, 13 when the other pedal 13, 12 is activated by the driver.
  • the main purpose of device 14 is to prevent random rotation, in a given direction, of left side pedal 13 while right side pedal 12 is foot-operated by the driver, and vice versa, so as to prevent the driver from inadvertently pressing both side pedals 12, 13 simultaneously.
  • device 14 comprises a bush 15 ( Figures 2, 3, 4) fixed to a rear face 11a of central pedal 11 by a pedestal 16.
  • a lever LV ( Figures 1, 2), for activating the master brake cylinder, is fixed to bush 15.
  • Bush 15 is fitted through with a rod AST, the threaded ends AST*, AST** of which are screwed to second portion 12c** of connecting rod 12c and to second portion 13c** of connecting rod 13c respectively.
  • Rod AST also comprises an enlarged central portion AST***, which, in the rest position shown in Figure 3, is located inside bush 15.
  • Device 14 also comprises two helical springs SPl,
  • SP2 located on opposite sides of bush 15, and each wound about a respective portion of rod AST and housed at least partly inside a respective sleeve 17, 18 having an end 17a, 18a.
  • End 17a has a through hole 17b, and end 18a a through hole 18b.
  • through holes 17a and 18a are fitted through with rod AST.
  • end 17a rests on a lateral face of bush 15 and on a lateral face of enlarged central portion AST***.
  • end 18a rests on a lateral face of bush 15 and on a lateral face of enlarged central portion AST***.
  • a first shoulder 19 is formed at threaded end AST* of rod AST, and a second shoulder 20 is formed at threaded end AST** of rod AST.
  • a plate 21 is gripped between bolt head 12c*** and shoulder 19, and a plate 22 is gripped between bolt head 13c*** and shoulder 20.
  • a first end SPl* of spring SPl rests on end 17a of sleeve 17, and a second end SPl** of spring SPl rests on plate 21.
  • a first end SP2* of spring SP2 rests on end 18a of sleeve 18, and a second end SP2** of spring SP2 rests on plate 22.
  • left side pedal 13 will be aligned almost instantaneously with central pedal 11, so that, if the driver continues to exert foot pressure simultaneously on side pedal 13 and central pedal 11, the system will start to brake immediately.
  • sleeve 17 has also moved in the direction of arrow ARWl, while still resting on a lateral face of enlarged central portion AST*** of rod AST.
  • spring SP2 can only be pushed so far means the rod can only be slid so far in the direction of arrow ARWl, thus limiting rotation of the other side pedal 12 about hinge HNl (i.e. in the direction of arrow
  • ARW2 ARW2
  • right side pedal 12 also activates a respective switch SWTl by means of a respective cam CMl and respective transmission member 50.
  • both switches SWTl, SWT2 are set to OFF, and the electronic system connected to pedal arrangement 10 interprets this as a driver request for "normal” braking by simply pressing central pedal 11.
  • the tractor's electronic control system prevents activation of the steer-by-braking function over and above a given tractor travelling speed, to prevent potentially hazardous swerving of the vehicle.
  • Switches SWTl, SWT2 may be replaced by potentiometers or any other device performing the same functions, e.g. electronic instruments for determining the relative position of the two side pedals 12, 13, or an electronic device for determining displacement of rod AST in the direction of arrow ARWl or in the opposite direction .
  • the main advantages of the present invention may be summed up as follows:

Abstract

A tractor steer-by-braking (SBF) pedal arrangement (10). The pedal arrangement (10) is characterized by having a central brake pedal (11) connected on one side to a right side pedal (12), and on the other side to a left side pedal (13). The central brake pedal (11) acts on a brake system (SBF) to produce the desired braking action. Each of the two side pedals (12, 13), when foot-operated by the driver, generate an activating signal to activate an electronic brake system, which only activates the brake required to steer-by-braking (SBF) in the desired (right or left) direction.

Description

STEERING AND BRAKING PEDAL ARRANGEMENT FOR TRACTORS
The present invention relates to a steering and braking pedal arrangement for tractors .
Conventional tractors are equipped with a steer-by- braking pedal arrangement, normally comprising two brake pedals enabling a so-called steer-by-braking function (SBF) .
In this type of brake pedal arrangement, if the driver presses the left (or right) pedal only, the brake system only brakes the rear left (or right) wheel, thus reducing the turn radius of the tractor, especially during headland manoeuvres.
At present, the two brake pedals simply have a driver-operated mechanical lock device for integrally connecting the pedals for on-road use or when the SBF is not required.
The mechanical lock should always be used when running on-road, to safeguard against the driver inadvertently pressing only one of the two pedals when the tractor is running at high speed, thus resulting in sharp swerving or even capsizing of the vehicle.
In other words, when running on-road, the two brake pedals are connected integrally by the lock device, and can only be pressed simultaneously to slow down or stop the vehicle as a whole.
This long-standing solution, however, has two main drawbacks :
(1) the driver may neglect to activate the lock device to connect the two brake pedals integrally before the vehicle gets up to speed, thus resulting, as stated, in highly dangerous situations in the event of emergency braking (swerving of the vehicle at high speed, if only one pedal is pressed) ; (2) using current systems, the steer-by-braking function (SBF) cannot be applied effectively to electronic (e.g. ABS) brake systems.
It is therefore an object of the present invention to provide a tractor pedal arrangement designed to eliminate the aforementioned drawbacks, and which at the same time is cheap and easy to produce.
According to the present invention, there is provided a tractor pedal arrangement as claimed in the accompanying Claims. A non-limiting embodiment of the present invention will be described by way of example with reference to the accompanying drawings, in which:
Figure 1 shows a front view of a pedal arrangement in accordance with the present invention; Figure 2 shows a rear view of the Figure 1 pedal arrangement;
Figure 3 shows a plan view of a first configuration of the Figure 1 and 2 pedal arrangement; Figure 4 shows a plan view of a second configuration of the Figure 1 and 2 pedal arrangement.
It should be pointed out that Figure 1 is to a different scale from the other drawings. Number 10 in the attached drawings indicates as a whole a pedal arrangement, for a tractor (not shown) , in accordance with the present invention.
Pedal arrangement 10 comprises a central brake pedal 11 connected to a right side pedal 12 and a left side pedal 13.
Right side pedal 12 and left side pedal 13 are connected to central brake pedal 11 by respective hinges HNl and HN2.
Central pedal 11 provides for actually acting on the master cylinder (not shown) of the brake system (not shown) and so producing the desired braking action, whereas right side pedal 12, when foot-operated by the driver (not shown) , generates an activating signal informing the control system of the driver's intention to activate the rightward steer-by-braking function.
The tractor's electronic system therefore only activates the brake of the rear right wheel (not shown) of the vehicle.
The same also applies to left side pedal 13, which, when foot-operated by the driver, generates a signal to only activate the rear left brake.
More specifically, as shown in Figures 2, 3, 4, right side pedal 12 has a projection 12a, to which a connecting rod 12c is hinged by an articulated joint 12b.
Connecting rod 12c comprises a fork-shaped first portion 12c* (Figure 2); and a second portion 12c** formed in one piece with first portion 12c* and in the form of an internally threaded sleeve.
A bolt head 12c*** is provided at one end of second portion 12c**.
A connecting rod 13c of left pedal 13 has the same parts.
For the sake of simplicity, the parts of connecting rod 13c are not described, but are numbered accordingly in the attached drawings .
A device 14 between connecting rods 12c and 13c provides for substantially disabling rotation of one of side pedals 12, 13 when the other pedal 13, 12 is activated by the driver.
In other words, the main purpose of device 14 is to prevent random rotation, in a given direction, of left side pedal 13 while right side pedal 12 is foot-operated by the driver, and vice versa, so as to prevent the driver from inadvertently pressing both side pedals 12, 13 simultaneously.
More specifically, device 14 comprises a bush 15 (Figures 2, 3, 4) fixed to a rear face 11a of central pedal 11 by a pedestal 16.
A lever LV (Figures 1, 2), for activating the master brake cylinder, is fixed to bush 15. Bush 15 is fitted through with a rod AST, the threaded ends AST*, AST** of which are screwed to second portion 12c** of connecting rod 12c and to second portion 13c** of connecting rod 13c respectively. Rod AST also comprises an enlarged central portion AST***, which, in the rest position shown in Figure 3, is located inside bush 15.
Device 14 also comprises two helical springs SPl,
SP2 located on opposite sides of bush 15, and each wound about a respective portion of rod AST and housed at least partly inside a respective sleeve 17, 18 having an end 17a, 18a.
End 17a has a through hole 17b, and end 18a a through hole 18b. In actual use, through holes 17a and 18a are fitted through with rod AST.
In the rest position shown in Figure 3, end 17a rests on a lateral face of bush 15 and on a lateral face of enlarged central portion AST***. Likewise, in the rest position shown in Figure 3, end 18a rests on a lateral face of bush 15 and on a lateral face of enlarged central portion AST***.
A first shoulder 19 is formed at threaded end AST* of rod AST, and a second shoulder 20 is formed at threaded end AST** of rod AST.
As shown in Figure 3, a plate 21 is gripped between bolt head 12c*** and shoulder 19, and a plate 22 is gripped between bolt head 13c*** and shoulder 20. As shown clearly in Figures 3 and 4, a first end SPl* of spring SPl rests on end 17a of sleeve 17, and a second end SPl** of spring SPl rests on plate 21.
Likewise, a first end SP2* of spring SP2 rests on end 18a of sleeve 18, and a second end SP2** of spring SP2 rests on plate 22.
In actual use, as shown in Figure 4, when the driver exerts foot pressure Fl on left pedal 13, left pedal 13 is positioned roughly coplanar with central pedal 11.
If spring SP2 opposes little resistance, left side pedal 13 will be aligned almost instantaneously with central pedal 11, so that, if the driver continues to exert foot pressure simultaneously on side pedal 13 and central pedal 11, the system will start to brake immediately.
As side pedal 13 rotates about hinge HN2, projection 13a pushes rod AST in the direction of arrow ARWl, so that side pedal 12 rotates slightly about hinge HNl in the direction of arrow ARW2.
As can be seen, the direction of arrow ARW2 is the opposite to that required to activate right pedal 12 and the relative brake.
As can be seen by comparing the Figure 3 and 4 system configurations, operation of side pedal 13 causes plate 22 to compress end SP2** of spring SP2 until plate
22 comes to rest on the free end of sleeve 18, the end
18a of which in turn rests on a lateral face of bush 15. Spring SP2 is therefore gripped between plate 22 and the end 18a of sleeve 18, in turn resting on bush 15.
At the same time, sleeve 17 has also moved in the direction of arrow ARWl, while still resting on a lateral face of enlarged central portion AST*** of rod AST.
The fact that spring SP2 can only be pushed so far means the rod can only be slid so far in the direction of arrow ARWl, thus limiting rotation of the other side pedal 12 about hinge HNl (i.e. in the direction of arrow
ARW2) .
The same also applies when the driver presses right side pedal 12. As can be seen by comparing Figures 3 and 4, device 14, and in particular rod AST connecting the two side pedals 12, 13, makes it impossible for both side pedals 12, 13 to be pressed simultaneously.
Springs SPl and SP2 obviously serve to restore respective side pedals 12, 13 to the Figure 3 rest position once pressure is removed by the driver from either one of side pedals 12, 13.
As shown in Figure 2, right side pedal 12 also activates a respective switch SWTl by means of a respective cam CMl and respective transmission member 50.
Likewise, rotation of left side pedal 13 activates a respective switch SWT2 by means of a respective cam CM2 and respective transmission member 51.
When neither of side pedals 12, 13 is pressed by the driver, both switches SWTl, SWT2 are set to OFF, and the electronic system connected to pedal arrangement 10 interprets this as a driver request for "normal" braking by simply pressing central pedal 11.
On the other hand, if the driver exerts foot pressure on either one of side pedals 12, 13, the corresponding switch SWTl or STW2 switches to ON, which is interpreted by the control system as the driver's intention to activate the steer-by-braking function
(SBF) in one of the two directions.
In a preferred embodiment of the present invention, the tractor's electronic control system prevents activation of the steer-by-braking function over and above a given tractor travelling speed, to prevent potentially hazardous swerving of the vehicle.
Switches SWTl, SWT2 may be replaced by potentiometers or any other device performing the same functions, e.g. electronic instruments for determining the relative position of the two side pedals 12, 13, or an electronic device for determining displacement of rod AST in the direction of arrow ARWl or in the opposite direction . The main advantages of the present invention may be summed up as follows:
- it solves the problem of the driver neglecting to connect the two brake pedals integrally prior to the vehicle reaching high speed; it provides for applying the steer-by-braking function (SBF) to electronic (e.g. ABS) brake systems.

Claims

1) A steering and braking (SBF) pedal arrangement (10) for a tractor, characterized by comprising a central brake pedal (11) connected on one side to a right side pedal (12), and on the other side to a left side pedal (13) ; said central brake pedal (11) acting on a brake system to produce the desired braking action; and each of the two side pedals (12, 13), when foot-operated by the driver, generating an activating signal to activate a brake system of the type (SBF) implemented by said central brake pedal (11), so as to only activate the brake required to steer-by-braking (SBF) in the desired direction.
2) A pedal arrangement (10) as claimed in Claim 1, characterized in that the right side pedal (12) and left side pedal (13) are connected mechanically to the central brake pedal (11) by respective hinges (HNl, HN2) .
3) A pedal arrangement (10) as claimed in either one of the foregoing Claims, characterized in that the right side pedal (12) activates a respective first switch (SWTl), and, likewise, rotation of the left side pedal (13) activates a respective second switch (SWT2) .
4) A pedal arrangement (10) as claimed in Claim 3, characterized in that said first switch (SWTl) is activated by means of a respective first cam (CMl) and a respective first transmission member (50), and said second switch (SWT2) is activated by means of a respective second cam (CM2) and a respective second transmission member (51) . 5) A pedal arrangement (10) as claimed in any one of Claims 1 to 3, characterized in that the right side pedal (12) activates a respective first potentiometer, and, likewise, rotation of the left side pedal (13) activates a respective second potentiometer. 6) A pedal arrangement (10) as claimed in any one of Claims 1 to 3, characterized by comprising an electronic device for determining the relative position of the two side pedals (12, 13) .
7) A pedal arrangement (10) as claimed in any one of the foregoing Claims, characterized in that the two side pedals (12, 13) are connected mechanically by a device (14) for substantially disabling rotation of one of the two side pedals (12, 13) when the other side pedal (13, 12) is activated by the driver. 8) A pedal arrangement (10) as claimed in Claim 7, characterized in that said device (14) comprises a rod
(AST), the ends (AST*, AST**) of which are connected mechanically to the right side pedal (12) and left side pedal (13) respectively. 9) A pedal arrangement (10) as claimed in Claim 8, characterized by comprising an electronic device for determining displacement of said rod (AST) in one direction (ARWl) or the opposite direction. 10) A pedal arrangement (10) as claimed in Claim 8, characterized in that said rod (AST) comprises an enlarged central portion (AST***) which, in a rest position, is located inside a bush (15) . 11) A pedal arrangement (10) as claimed in Claim
10, characterized in that the device (14) also comprises two helical springs (SPl, SP2) located on opposite sides of said bush (15); each spring (SPl, SP2) being wound about a respective portion of said rod (AST) , and being housed at least partly in a respective sleeve (17, 18); and each sleeve (17, 18) having a respective end (17a, 18a) with a hole.
12) A pedal arrangement (10) as claimed in Claim
11, characterized in that each said end (17a, 18a) has a respective through hole (17b, 18b); the through holes
(17a, 18a) being fitted through, in use, with said rod (AST) .
13) A pedal arrangement (10) as claimed in Claim 11, characterized in that, in a rest configuration, each said end (17a, 18a) rests on a respective lateral face of said bush (15) and on a respective lateral face of said enlarged central portion (AST***) .
14) A pedal arrangement (10) as claimed in Claim 13, characterized in that, in use, when a given foot pressure (Fl) is applied by the driver on the left side pedal (13), the left side pedal (13) is positioned roughly coplanar with the central brake pedal (11); and rotation of the left side pedal (13) about the respective hinge (HN2) pushes said rod (AST) in a first direction (ARWl), thus rotating said right side pedal (12) slightly about the respective hinge (HNl) in a second direction (ARW2) . 15) A pedal arrangement (10) as claimed in Claim 14, characterized in that, as the left side pedal (13) is pressed, a plate (22) compresses one end (SP2**) of the relative spring (SP2) until the plate (22) comes to rest on the free end of the relative sleeve (18); the end (18a) of the sleeve (18) in turn resting on a lateral face of the bush (15); and said spring (SP2) being gripped between the plate (22) and the end (18a) of the sleeve (18), in turn resting on the bush (15) .
16) A pedal arrangement (10) as claimed in any one of the foregoing Claims, characterized in that an electronic control system of the tractor prevents activation of the steer-by-braking function (SBF) over and above a predetermined tractor speed.
17) An electronically controlled brake system, in particular an ABS system, characterized by comprising at least one pedal arrangement, as claimed in any one of Claims 1 to 16.
PCT/EP2009/051572 2008-02-21 2009-02-11 Steering and braking pedal arrangement for tractors WO2009103642A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
RU2010138819/11A RU2482987C2 (en) 2008-02-21 2009-02-11 Tractor steering and braking pedal mechanism
BRPI0907517-8A BRPI0907517B1 (en) 2008-02-21 2009-02-11 ARRANGEMENT OF BRAKE AND STEERING PEDALS FOR TRACTORS AND ELECTRONICLY CONTROLLED BRAKE SYSTEM
JP2010547149A JP5405495B2 (en) 2008-02-21 2009-02-11 Tractor steering and braking pedal device
US12/918,630 US8827048B2 (en) 2008-02-21 2009-02-11 Steering and braking pedal arrangement for tractors
CN200980105910.3A CN101945785B (en) 2008-02-21 2009-02-11 Steering and braking pedal arrangement for tractors

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08425106A EP2093111B1 (en) 2008-02-21 2008-02-21 Steering and braking pedal arrangement for tractors
EP08425106.5 2008-02-21

Publications (1)

Publication Number Publication Date
WO2009103642A1 true WO2009103642A1 (en) 2009-08-27

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PCT/EP2009/051572 WO2009103642A1 (en) 2008-02-21 2009-02-11 Steering and braking pedal arrangement for tractors

Country Status (9)

Country Link
US (1) US8827048B2 (en)
EP (1) EP2093111B1 (en)
JP (1) JP5405495B2 (en)
CN (1) CN101945785B (en)
AT (1) ATE483607T1 (en)
BR (1) BRPI0907517B1 (en)
DE (1) DE602008002892D1 (en)
RU (1) RU2482987C2 (en)
WO (1) WO2009103642A1 (en)

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BRPI0907517A2 (en) 2015-07-28
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US8827048B2 (en) 2014-09-09
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CN101945785A (en) 2011-01-12
EP2093111A1 (en) 2009-08-26

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