WO2001003976A1 - Safety pedal for motor vehicles - Google Patents

Safety pedal for motor vehicles Download PDF

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Publication number
WO2001003976A1
WO2001003976A1 PCT/EP2000/006386 EP0006386W WO0103976A1 WO 2001003976 A1 WO2001003976 A1 WO 2001003976A1 EP 0006386 W EP0006386 W EP 0006386W WO 0103976 A1 WO0103976 A1 WO 0103976A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor vehicles
arm
safety
pedal
piston
Prior art date
Application number
PCT/EP2000/006386
Other languages
French (fr)
Inventor
Domenico Gucciardi
Original Assignee
La Banca Delle Idee S.P.A.
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 La Banca Delle Idee S.P.A. filed Critical La Banca Delle Idee S.P.A.
Priority to AU64323/00A priority Critical patent/AU6432300A/en
Publication of WO2001003976A1 publication Critical patent/WO2001003976A1/en

Links

Classifications

    • 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
    • G05G1/32—Controlling members actuated by foot with means to prevent injury
    • G05G1/323—Controlling members actuated by foot with means to prevent injury means disconnecting the connection between pedal and controlled member, e.g. by breaking or bending the connecting rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/09—Control elements or operating handles movable from an operative to an out-of-the way position, e.g. pedals, switch knobs, window cranks
    • 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
    • B60T7/06—Disposition of pedal
    • B60T7/065—Disposition of pedal with means to prevent injuries in case of collision

Definitions

  • the present invention concerns a safety pedal for motor vehicles. More particularly, the invention concerns a safety pedal for motor vehicles, which is equipped with a quick release mechanism which becomes operative in case of vehicle collision against an obstacle
  • motor vehicles are equipped with pedals for controlling certain devices, such as brakes and clutch. It is also known that such control pedals, in case of vehicle collision against an obstacle, may hit the limbs of the driver and cause lesions.
  • a first aim of the present invention is to prevent the driver from suffering, in case of frontal collisions, damages to the lower limbs caused by the vehicle pedals.
  • solutions to the above mentioned problem are being studied by the major motor vehicle manufacturers. Such solutions generally provide for the pedal deformation or employ systems allowing the pedal release from the vehicle body.
  • a second aim of the present invention is therefore to provide a mechanism which is operative also in case of a light collision.
  • DE-C 196 17 372 discloses a brake pedal associated with a safety mechanism that is operated by a pyrotechnic gas generator controlled by a collision detector, and that, in case of collision, provides for eliminating a rigid coupling between the brake pedal and a control rod of the brake system.
  • the gas generator acts on the link between the brake pedal arm and the control rod so as to to allow the pivot of that link to freely slide on the control rod in case of continued pressure of the foot on the pedal.
  • the pedal arm and the control rod remain joined together after operation of the safety mechanism.
  • a pedal equipped with a safety mechanism which, when operated, causes the ejection of the pivot pin linking the pedal arm and the control rod, thereby resulting in the separation of such arm from the rod.
  • FIG. la is a side view of a safety pedal for vehicles according to the invention, in idle condition;
  • Figure lb is a side view of the pedal of Figure la, in operating condition
  • Figure lc is a side view of the pedal of Figure la, after the release mechanism has become operative;
  • FIG. 2 is a part sectional view of the release mechanism of the safety pedal according to the invention. Referring to Figures la, lb, lc, there is shown a brake pedal
  • a transmission rod 6 for controlling the brake system of the vehicle is pivotally connected at one end to said arm 2 of the brake pedal, at a point between pivot point 4 and step surface 3.
  • a quick release mechanism 10 comprising a hollow cylinder 1 1 having a flanged end portion 1 1', which fits into a hole 7 formed in arm 2 of the brake pedal.
  • End portion 1 1" of the cylinder opposite to flanged end portion 11', is externally threaded to allow screwing a nut 13 for locking cylinder 1 1 on arm 2 of the brake pedal. Screws 8 engaging in arm 2 of the brake pedal are provided to prevent said nut 13 from becoming unscrewed. Similarly, locking of flanged end portion 1 1 ' is obtained through screws 16 engaging in arm 2 of the brake pedal.
  • a piston 40 is inserted within the axial cavity of cylinder 1 1 and has a portion 40" projecting from cylinder 11 so as to retain, through flanged end 40', rod 6 which is pivotally mounted onto piston 40.
  • a gas generating device 30 is also inserted within the axial cavity of cylinder 11, on the opposite side with respect to piston 40.
  • Gas generating device 30 may be one of the well known devices used, for instance, in safety belt pretensioning devices or in air bags of vehicles. Said gas generating devices comprise a chamber containing a compound in which, upon the passage of an electric current, a chemical reaction resulting in gas generation is started.
  • flanged end 11 ' is hermetically sealed by a cover 14 through screws 19 screwed in threaded bores 20 formed on flanged end 11' of cylinder 11.
  • Electric cables 21 for triggering device 30 are led to the outside through cover 14 and are protected by means of a cap 18 of plastic material.
  • An electronic control unit which is used for actuating the pretensioning devices and the air bags, can be programmed to send the triggering signal also to gas generating device 30 of release mechanism 10.
  • said electronic control unit can send the triggering signal to the gas generating devices provided in the vehicle safety systems, such as pretensioning devices, air bags etc., including the release mechanism of the invention.
  • one or more blind holes 22 are provided around the edge of flanged end portion 11 ' of cylinder 1 1 , and can be engaged by a suitable tool.
  • retaining means consisting of springs
  • clips 15 can also be provided, which are pivotally mounted at 23 around the edge of nut 13 and which grasp flanged end 40' of piston 40.
  • a cable 26 made of steel or other resistant material is provided. Said cable is retained at one end by a screw 24 screwed into a threaded bore 25 formed on flanged end 40' of piston 40, and at the other end by a screw 27 screwed on nut 13.
  • Fig. lb shows the brake pedal according to the present invention in completely pressed position when the release mechanism has not yet been operated.
  • Fig. lc shows the brake pedal according to the present invention after operation of the release mechanism.
  • the brake pedal, released from rod 6, has exploited the gap, that generally is of at least about ten centimetres, to freely move forward and reach the vehicle body floor.
  • Piston 40 ejected from cylinder 11 is retained by cable 26.
  • the impact between the released brake pedal and the vehicle body can be dampened by arranging a pad of resilient material on the vehicle body floor, or by an air bag device provided on the body floor, as already suggested by firm Pars which belongs to Siemens group.
  • a lubricated bush (not shown) can be arranged between piston 40 and rod 6 to assist in the ejection of piston 40 from rod 6.
  • an electrically operated valve can be provided which, upon operation of mechanism 10, will keep the hydraulic circuit of the braking system pressurised, thereby preventing the operation of mechanism 10 from resulting in the release of the vehicle brakes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Mechanical Control Devices (AREA)

Abstract

A safety pedal for motor vehicles, including an arm (2) to which a control rod (6) for a device controlling the vehicle drive is pivotally connected, wherein a mechanism (10) for the quick release of said rod (6) from said arm (2) is provided.

Description

SAFETY PEDAL FOR MOTOR VEHICLES
The present invention concerns a safety pedal for motor vehicles. More particularly, the invention concerns a safety pedal for motor vehicles, which is equipped with a quick release mechanism which becomes operative in case of vehicle collision against an obstacle
As known, motor vehicles are equipped with pedals for controlling certain devices, such as brakes and clutch. It is also known that such control pedals, in case of vehicle collision against an obstacle, may hit the limbs of the driver and cause lesions.
Moreover, when a road accident occurs, generally at least one foot of the driver is pressing e. g. on the brake pedal so that, in case of frontal collision, even of small entity, a rebound is generated and transmitted by the brake pedal to the lower limb of the driver, thereby often causing lesions and fractures.
A first aim of the present invention is to prevent the driver from suffering, in case of frontal collisions, damages to the lower limbs caused by the vehicle pedals. At present, solutions to the above mentioned problem are being studied by the major motor vehicle manufacturers. Such solutions generally provide for the pedal deformation or employ systems allowing the pedal release from the vehicle body.
However such solutions are not effective in case of light collisions, in that under such conditions generally such systems are not operated.
A second aim of the present invention is therefore to provide a mechanism which is operative also in case of a light collision.
DE-C 196 17 372 discloses a brake pedal associated with a safety mechanism that is operated by a pyrotechnic gas generator controlled by a collision detector, and that, in case of collision, provides for eliminating a rigid coupling between the brake pedal and a control rod of the brake system. In one embodiment, the gas generator acts on the link between the brake pedal arm and the control rod so as to to allow the pivot of that link to freely slide on the control rod in case of continued pressure of the foot on the pedal. The pedal arm and the control rod remain joined together after operation of the safety mechanism.
According to the invention there is provided a pedal equipped with a safety mechanism which, when operated, causes the ejection of the pivot pin linking the pedal arm and the control rod, thereby resulting in the separation of such arm from the rod.
The features of the invention are defined in the appended claims.
The present invention will be better described by way of non limiting example with reference to the accompanying drawings, in which:
- Figure la is a side view of a safety pedal for vehicles according to the invention, in idle condition;
- Figure lb is a side view of the pedal of Figure la, in operating condition;
- Figure lc is a side view of the pedal of Figure la, after the release mechanism has become operative;
- Figure 2 is a part sectional view of the release mechanism of the safety pedal according to the invention. Referring to Figures la, lb, lc, there is shown a brake pedal
1 , comprising an arm 2 equipped with a step surface 3 for the driver's foot and pivo tally connected in 4 to the vehicle body 5.
A transmission rod 6 for controlling the brake system of the vehicle is pivotally connected at one end to said arm 2 of the brake pedal, at a point between pivot point 4 and step surface 3.
As shown in Fig. 2, the pivotal connection between said rod 6 and said arm 2 is obtained through a quick release mechanism 10 comprising a hollow cylinder 1 1 having a flanged end portion 1 1', which fits into a hole 7 formed in arm 2 of the brake pedal.
End portion 1 1" of the cylinder, opposite to flanged end portion 11', is externally threaded to allow screwing a nut 13 for locking cylinder 1 1 on arm 2 of the brake pedal. Screws 8 engaging in arm 2 of the brake pedal are provided to prevent said nut 13 from becoming unscrewed. Similarly, locking of flanged end portion 1 1 ' is obtained through screws 16 engaging in arm 2 of the brake pedal.
A piston 40 is inserted within the axial cavity of cylinder 1 1 and has a portion 40" projecting from cylinder 11 so as to retain, through flanged end 40', rod 6 which is pivotally mounted onto piston 40. A gas generating device 30 is also inserted within the axial cavity of cylinder 11, on the opposite side with respect to piston 40. Gas generating device 30 may be one of the well known devices used, for instance, in safety belt pretensioning devices or in air bags of vehicles. Said gas generating devices comprise a chamber containing a compound in which, upon the passage of an electric current, a chemical reaction resulting in gas generation is started.
Once gas generating device 30 has been mounted, flanged end 11 ' is hermetically sealed by a cover 14 through screws 19 screwed in threaded bores 20 formed on flanged end 11' of cylinder 11. Electric cables 21 for triggering device 30 are led to the outside through cover 14 and are protected by means of a cap 18 of plastic material.
An electronic control unit, not shown, which is used for actuating the pretensioning devices and the air bags, can be programmed to send the triggering signal also to gas generating device 30 of release mechanism 10. Advantageously, upon a collision, said electronic control unit can send the triggering signal to the gas generating devices provided in the vehicle safety systems, such as pretensioning devices, air bags etc., including the release mechanism of the invention. To make easier the locking of cylinder 11 while screwing nut
13, one or more blind holes 22 are provided around the edge of flanged end portion 11 ' of cylinder 1 1 , and can be engaged by a suitable tool.
In order to retain piston 40 on cylinder 1 1 before mechanism 10 is operated, retaining means are provided consisting of springs
12 fastened to pairs of L- shaped brackets 12' secured to nut 13 and to flanged end 40' of piston 40.
In alternative or in addition to said springs 12, clips 15 can also be provided, which are pivotally mounted at 23 around the edge of nut 13 and which grasp flanged end 40' of piston 40.
Advantageously, to prevent piston 40 from causing damages to the vehicle or the persons therein when the piston itself is being ejected, a cable 26 made of steel or other resistant material is provided. Said cable is retained at one end by a screw 24 screwed into a threaded bore 25 formed on flanged end 40' of piston 40, and at the other end by a screw 27 screwed on nut 13.
Such cable 26 will have a sufficient length to allow piston 40 to completely go out of cylinder 11 due to the effect of the gas generated by device 30. Fig. lb shows the brake pedal according to the present invention in completely pressed position when the release mechanism has not yet been operated.
In such condition, a gap is still available for the brake pedal oscillation permitted by the curved shape of vehicle body 5 in the region shown by reference numeral 5'. Such curved shape of the vehicle body is essential for the safety pedal operation, in that any further oscillation of the pedal occurring after the release from rod
6 allows eliminating the rebound on the pedal caused by the vehicle collision against an obstacle.
Fig. lc shows the brake pedal according to the present invention after operation of the release mechanism. In such condition the brake pedal, released from rod 6, has exploited the gap, that generally is of at least about ten centimetres, to freely move forward and reach the vehicle body floor.
Piston 40 ejected from cylinder 11 is retained by cable 26. Advantageously, the impact between the released brake pedal and the vehicle body can be dampened by arranging a pad of resilient material on the vehicle body floor, or by an air bag device provided on the body floor, as already suggested by firm Pars which belongs to Siemens group. Moreover, a lubricated bush (not shown) can be arranged between piston 40 and rod 6 to assist in the ejection of piston 40 from rod 6.
To maintain the vehicle braking action even after the release of arm 2 of the brake pedal from rod 6, an electrically operated valve can be provided which, upon operation of mechanism 10, will keep the hydraulic circuit of the braking system pressurised, thereby preventing the operation of mechanism 10 from resulting in the release of the vehicle brakes.
Although the present invention has been described with reference to a brake pedal, the safety pedal can be advantageously applied also to pedals of any other kind.

Claims

Claims
1. A safety pedal for motor vehicles, including an arm (2) to which a control rod (6) for means controlling the vehicle drive is pivotally connected, and a safety mechanism (10) associated with the pivotal connection between the arm (2) and the control rod (6) for the quick release of said rod (6) from said arm (2) upon a collision, said mechanism (10) being operated by a gas generating device (30) controlled by a collision detector, characterised in that said mechanism (10) comprises: - a hollow cylinder (1 1) mounted in said arm (2) and having an axial cavity accommodating, at one end, said gas generating device (30); and
- a piston (40) which: is slidably received within said cavity of said cylinder (11) at a second end thereof; has a portion (40") projecting from said cavity and from said arm (6) for the pivotal mounting of said rod (6) on said arm (2); and has an end face facing said gas generating device (30) inside said cavity and exposed to the action thereof so that pressure of the gas generated by said gas generating device upon a collision causes ejection of the piston from the cavity, thereby resulting in the separation of the arm (2) and the rod
(6).
2. A safety pedal for motor vehicles as claimed in claim 1, characterised in that said cylinder (11) has a flanged end portion (11') which accommodates said gas generating device
(30), said flanged end portion (11') further having a cover (14) fastened through screws (19) for hermetically sealing said gas generating device (30).
3. A safety pedal for motor vehicles as claimed in claim 1 or 2, characterised in that said cylinder (1 1) has the other end (1 1") externally threaded for the screwing of a nut (13) for locking said cylinder (11) onto said arm (2).
4. A safety pedal for motor vehicles as claimed in claim 1 , characterised in that the projecting portion (40") of said piston is equipped with an end flange (40') for retaining the rod (6) onto the arm (2).
5. A safety pedal for motor vehicles as claimed in any preceding claim, characterised in that it includes retaining means arranged to keep the piston (40) within the cylinder (1 1) until the moment said mechanism (10) is operated.
6. A safety pedal for motor vehicles as claimed in claim 5, characterised in that said retaining means comprise a plurality of springs secured to pairs of L-shaped brackets (12') fastened to said nut (13) and to said end flange (40') of the piston (40).
7. A safety pedal for motor vehicles as claimed in claims 5 or 6, characterised in that said retaining means comprise a plurality of clips (15) pivotally connected to said nut (13) and grasping the flanged end (40') of the piston (40).
8. A safety pedal for motor vehicles as claimed in claim 4, characterised in that a threaded bore (25) is formed in said flanged end (40') of said piston (40) for securing, through a screw (24), a cable (26) made of steel or other resistant material, said cable (26) having its other end fastened to said nut (13).
9. A safety pedal for motor vehicles as claimed in any preceding claim, characterised in that said safety mechanism (10) is associated with the brake pedal.
10. A safety pedal for motor vehicles as claimed in any preceding claim, characterised in that said gas generating device (30) is triggered by an electric pulse sent by an electronic control unit controlling, upon a collision, triggering of gas generating devices associated to other safety equipment in the vehicle.
PCT/EP2000/006386 1999-07-07 2000-07-06 Safety pedal for motor vehicles WO2001003976A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU64323/00A AU6432300A (en) 1999-07-07 2000-07-06 Safety pedal for motor vehicles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO99A000588 1999-07-07
IT1999TO000588 IT1308794B1 (en) 1999-07-07 1999-07-07 SAFETY PEDAL FOR MOTOR VEHICLES.

Publications (1)

Publication Number Publication Date
WO2001003976A1 true WO2001003976A1 (en) 2001-01-18

Family

ID=11417946

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/006386 WO2001003976A1 (en) 1999-07-07 2000-07-06 Safety pedal for motor vehicles

Country Status (3)

Country Link
AU (1) AU6432300A (en)
IT (1) IT1308794B1 (en)
WO (1) WO2001003976A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1253051A1 (en) * 2001-04-27 2002-10-30 Societe Financiere D'etudes Et De Developpements Industriels Et Technologiques System to disengage the brake pedal in case of collision
DE10209907A1 (en) * 2002-03-07 2003-09-18 Zf Lemfoerder Metallwaren Ag Safety device for motor vehicles
FR2841011A1 (en) * 2002-06-14 2003-12-19 Peugeot Citroen Automobiles Sa Motor vehicle control pedal decoupler has releasable connection to allow release on vehicle impact
WO2010023022A1 (en) * 2008-08-29 2010-03-04 Robert Bosch Gmbh Connecting apparatus
CN102101471A (en) * 2009-12-17 2011-06-22 奥托立夫开发公司 Pedal apparatus used for motor vehicle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421807A (en) * 1945-04-26 1947-06-10 United Aircraft Corp Explosive-release mechanism
FR1194826A (en) * 1958-04-18 1959-11-12 Detachable charge explosive fasteners
EP0433940A1 (en) * 1989-12-19 1991-06-26 Trasco Export Gmbh Emergency exit device for an armoured vehicle
FR2706399A1 (en) * 1993-06-11 1994-12-23 Renault Device for connecting a motor vehicle servo brake control rod to an actuating pedal
DE19501680A1 (en) * 1995-01-20 1996-08-08 Schmidt Gmbh R Foot pedal unit for vehicle
WO1997028029A1 (en) * 1996-01-30 1997-08-07 Ab Volvo Method for activation of a safety arrangement in a vehicle
DE19617372C1 (en) * 1996-04-30 1998-01-02 Lucas Ind Plc Braking pedal device for road vehicle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421807A (en) * 1945-04-26 1947-06-10 United Aircraft Corp Explosive-release mechanism
FR1194826A (en) * 1958-04-18 1959-11-12 Detachable charge explosive fasteners
EP0433940A1 (en) * 1989-12-19 1991-06-26 Trasco Export Gmbh Emergency exit device for an armoured vehicle
FR2706399A1 (en) * 1993-06-11 1994-12-23 Renault Device for connecting a motor vehicle servo brake control rod to an actuating pedal
DE19501680A1 (en) * 1995-01-20 1996-08-08 Schmidt Gmbh R Foot pedal unit for vehicle
WO1997028029A1 (en) * 1996-01-30 1997-08-07 Ab Volvo Method for activation of a safety arrangement in a vehicle
DE19617372C1 (en) * 1996-04-30 1998-01-02 Lucas Ind Plc Braking pedal device for road vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1253051A1 (en) * 2001-04-27 2002-10-30 Societe Financiere D'etudes Et De Developpements Industriels Et Technologiques System to disengage the brake pedal in case of collision
FR2824027A1 (en) * 2001-04-27 2002-10-31 Financ D Etudes Et De Dev Ind METHOD AND DEVICE FOR CONTROLLING USING A PEDAL AN ACTUATING ROD OF A BRAKING OR CLUTCH SYSTEM OF A MOTOR VEHICLE WITH FLOORING OF THE PEDAL IN THE EVENT OF A FRONTAL SHOCK
DE10209907A1 (en) * 2002-03-07 2003-09-18 Zf Lemfoerder Metallwaren Ag Safety device for motor vehicles
FR2841011A1 (en) * 2002-06-14 2003-12-19 Peugeot Citroen Automobiles Sa Motor vehicle control pedal decoupler has releasable connection to allow release on vehicle impact
WO2010023022A1 (en) * 2008-08-29 2010-03-04 Robert Bosch Gmbh Connecting apparatus
CN102101471A (en) * 2009-12-17 2011-06-22 奥托立夫开发公司 Pedal apparatus used for motor vehicle

Also Published As

Publication number Publication date
ITTO990588A1 (en) 2001-01-07
IT1308794B1 (en) 2002-01-10
AU6432300A (en) 2001-01-30

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