DE3311220A1 - Operating device for the parking brake of a motor vehicle - Google Patents

Description

Patent Attorneys Βιγχ.-Ινο. H; We;: ckm an n, Dipl.-Phys. Dr. K. Fincke

Dipl.-Ing. F. A. Weickmann, Dipl.-Chem. B. Huber Dr.-Ing. H. Liska Dr. J. Prechtel

8000 MUNICH POST BOX 860

MOHLSTRASSE 22

TELEPHONE (0 89) 98 03

TELEX 5 22 621

TELEGRAM PATENTWEICKMANN MUNICH

CWA / SCH

FIAT AUTO S.p.A.

Corso Giovanni Agnelli

Turin / Italy

Actuating device for the parking brake of a

Motor vehicle

The invention relates to an actuating device
for the parking brake of a motor vehicle with
a cable power transmission, which is connected to a manual lever and arranged in such a way that the braking elements of two wheels of the vehicle
can be activated simultaneously by operating the lever mentioned.

The invention is based on the object of developing such an actuating device in such a way that
that it works particularly reliably.

This object is achieved in that the cable power transmission

-comprises a first flexible cable which the manual control lever connects one of the two wheels of the vehicle with the braking element and that via a pulley is guided by a holding member which can be approached and removed from said first wheel is worn

-as well as a second cable, one end of which is connected to the braking element of the other of the two wheels of the vehicle and the other end of which is connected to the
Holding member of the pulley of the first cable is anchored.

Thanks to these features, a uniform distribution of the transmitted from the manual lever is achieved in a particularly simple and economical way
Force on the braking elements of the two wheels.

The holding member preferably consists of a rocker arm, one end of which can be pivoted about an axis which is perpendicular to the connecting line of the two
Wheels and which at its other end the

swivel castor for the first cable and a side arm for anchoring the second cable wearing.

Advantageous refinements and developments result from the subclaims, which are hereby referred to Abbreviation of the description is expressly referred to.

The invention is explained in more detail below with reference to the drawings:

1 shows a schematic plan view of an actuating device according to the invention and

Fig. 2 shows a detail of Fig. 1 on a relatively enlarged scale.

In Fig. 1, the floor A of a motor vehicle is indicated schematically, which has two rear wheels R ₁ and R ″. Brakes F ₁ and F- are assigned to the two wheels R _{1 and R_.} Brake levers L ₁ and L ", which are connected to an actuating device 10 for the parking brake of the wheels R ₁ and R", are used to actuate them.

The operating device 10 comprises a manual operating lever .12 known type, which is mounted inside the passenger compartment and with a lockable and manual releasable locking device is provided. With the manual operating lever 12 is one end 14 of a first Cable 16 connected by two spaced apart arranged cable sleeves 18 and 20 runs around a pulley 2 2 is guided, one between two

-K-

at a distance from one another supporting members 26 and 28 lying jacket 24 passes and is anchored _{to the brake lever L 1 of} the brake F _{1 of} the wheel R _{1. A return spring M 1} is located between the brake lever L ₁ and the support member 28.

If the wheels R ₁ and R _{0 are carried} by links which are pivotably mounted about a transverse axis (not shown), the cable sleeve 20 is at least approximately on this transverse axis.

The deflection roller 22 is rotatably supported at one end of a rocker arm 30, the opposite end of which is articulated to the supporting structure of the vehicle by means of a vertical bolt 22, that is to say perpendicular to the floor A of the vehicle. As can be seen from FIG. 1, the rocker arm 30 extends essentially parallel to the longitudinal axis X of the vehicle. In this direction, the portion lying between the cable sleeve 20 and the guide roller 22 16a also extending the first cable 16. The rocker arm 30 is of the two wheels R ₁ and R ~ arranged in the vicinity of the axis Y and to the longitudinal axis X of the vehicle on the Side of the wheel R ~ offset. The position of the lever 30 can of course deviate from the position shown if this should be necessary, for example, due to the position of the fuel tank or other components of the vehicle which are located in the rear part of the floor A.

As can be seen from FIG. 2, the end of the rocker arm 30 carrying the deflecting roller 22 has a shoulder or arm 33, which is on the side of the wheel R "

protrudes. At the free end of the arm 34, one end of a second cable pull 36 is anchored, which runs through a jacket 38 lying between two spaced-apart support members 42 and 44 and at the opposite end to the brake lever L "of the brake F _{9 of} the wheel R ₉ is anchored. _{A return spring M 9} is located between the brake lever L and the support member 42.

From Fig. 1 it can be seen that both the section 16b of the first cable 16 and the section 36a of the second cable 36, which extend from the rocker arm 30 and are connected to the brake levers L and L, respectively, approximately orthogonal to the rocker arm 30 or . Extend essentially parallel to the axis Y of the two wheels R ₁ and R ₉ .

When the manual control lever 12 is pulled, the tensile force exerted on the first cable pull 16 causes both the forward movement of the brake lever L ₁ and, as a result, the activation of the brake F _{1 of} the wheel R ₁ and a simultaneous rotary movement of the rocker arm 30 around the bolt 32 on the side of the wheel RJ and consequently a tensile force on the second cable 36 anchored to the arm 34, whereby the lever L ₉ moves forward and at the same time the brake F _{9 of} the wheel R _{9 is} activated. In this way, a correct distribution of the force exerted on the power transmission 10 via the manual operating lever 12 is obtained in equal parts.

When the manual control lever 12 is manually returned to its lowered rest position, the brake levers L. and L _{9 also come} under the action of the pull

arranged springs M ₁ and M_ in their rest position, while the rocker arm 30 pivots back into the central position shown in FIG.

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Claims (3)

Patent attorneys Dipl.-Ing. K. Weickmann, Dipl.-Phys. Dr. K. Fincke Dipl.-Ing. R A.Weickmann, Dipl.-Chem. B. Huber Dr.-Ing. H. Liska Dr. J. Prechtel 8000 MUNICH 86 PO Box 860 820 MOHtSTRASSE 22 TELEPHONE (089) 980352 TELEX 522621 TELEGRAM PATENTWEICKMANN MÖNCHEN CWA / SCH PATENT CLAIMS V 1./actuating device for the parking brake of a motor vehicle with a cable power transmission, which is connected to a manual operating lever and is arranged in such a way that the braking members of two wheels of the vehicle are actuated of the mentioned lever can be activated simultaneously, characterized,
that the cable power transmission (10) comprises a first flexible cable (16) which connects the manual lever (12) with the braking element (L.) of one (R ..) of the two wheels (R ₁ , R ₃ ) of the vehicle ( A) connects and which is guided over a pulley (22) which is carried by a holding member (30) which can be approached and removed from said wheel (R.), -as well as a second cable (36), which with one end is connected to the braking element (L ") of the other (R ₉ ) of the two wheels (R., R) of the vehicle (A) and its other end to the holding element (30) of the pulley (22) of the first cable (16) is anchored. 2. Apparatus according to claim 1, characterized in that the holding member (30) is formed by a rocker arm (30) which has one end about an axis (32) perpendicular _{to the connecting line (Y) of the two wheels (R 1, R ")} ) is pivotably mounted on the vehicle (A) and which at its other end carries the rotatably mounted deflection pulley (22) of the first cable (16) and a lateral arm (34) for anchoring the second cable (36). 3. Apparatus according to claim 2, characterized in that the pivot axis (32) of the rocker arm (30) is directed perpendicular to the longitudinal axis (X) of the vehicle (A), that the rocker arm (30) is in the vicinity of the connecting line (Y) of the two wheels (R ₁ , R ₂ ) extending essentially parallel to the longitudinal axis (X) of the vehicle (A) and that the section (16b) of the first cable _{that is connected to the braking element (L 1} ) of the wheel (R _{1) in question} (16) and the second cable pull (36) emanate from the rocker arm (30) in a direction essentially orthogonal to this, while the section (16a) of the first cable pull (16) connected to the manual control lever (12) from the rocker arm (30) starts in a direction which is essentially parallel to the axis of this rocker arm (30).