Source: http://www.google.com/patents/US6655505?dq=6462713
Timestamp: 2014-10-25 03:42:07
Document Index: 419521130

Matched Legal Cases: ['art 9', 'art 13', 'art 9', 'art 13', 'art 13', 'art 13', 'art 13', 'art 13', 'art 9', 'art 13', 'art 13', 'art 9', 'art 13', 'art 13', 'art 9', 'art 9', 'art 13', 'art 13', 'art 11', 'art 9', 'art 13', 'art 13', 'art 9', 'art 13', 'art 13', 'art 9', 'art 9', 'art 13', 'art 13', 'art 11', 'art 9', 'art 63', 'arts 63', 'art 63', 'art 63', 'art 13', 'art 9', 'art 9', 'art 9', 'art 9', 'art 63', 'art 9', 'art 63', 'art 9']

Patent US6655505 - Parking brake actuating device for a parking brake arrangement in a motor ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA parking brake actuating device includes a rotary lever arrangement in operative connection with a compensation device providing an idle path and a restoring element for controlling the rotary lever arrangement. The rotary lever arrangement controls the engagement of a blocking member with a counter-blocking...http://www.google.com/patents/US6655505?utm_source=gb-gplus-sharePatent US6655505 - Parking brake actuating device for a parking brake arrangement in a motor vehicleAdvanced Patent SearchPublication numberUS6655505 B2Publication typeGrantApplication numberUS 10/037,140Publication dateDec 2, 2003Filing dateJan 3, 2002Priority dateJan 13, 2001Fee statusLapsedAlso published asDE10101363C1, US20020092710Publication number037140, 10037140, US 6655505 B2, US 6655505B2, US-B2-6655505, US6655505 B2, US6655505B2InventorsHorst Oppitz, Stephan BenkertOriginal AssigneeMannesmann Sachs AgExport CitationBiBTeX, EndNote, RefManPatent Citations (20), Non-Patent Citations (1), Referenced by (4), Classifications (13), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetParking brake actuating device for a parking brake arrangement in a motor vehicleUS 6655505 B2Abstract A parking brake actuating device includes a rotary lever arrangement in operative connection with a compensation device providing an idle path and a restoring element for controlling the rotary lever arrangement. The rotary lever arrangement controls the engagement of a blocking member with a counter-blocking member of the parking brake arrangement. The rotary lever arrangement has a rotary lever input part and a rotary lever output part and the idle path of the compensation device can be constructed so as to be in an operative connection between the rotary lever input part and the rotary lever output part.
We claim: 1. A parking brake actuating device for a parking brake arrangement in a motor vehicle, said parking brake arrangement comprising a blocking member and a counter-blocking member, said actuating device comprising:
a rotary lever arrangement which controls engagement of the blocking member with the counter-blocking member, said rotary lever arrangement comprising a rotary lever input part and a rotary lever output part which are rotatable relative to each other along an idle path when said blocking member is not engaged by said counter-blocking member, an actuator in operative connection with said rotary input part, said actuator comprising an electric motor and means for determining a switching position of the rotary lever input part, and a restoration element which reverses said idle path when said counter-blocking member engages said blocking member. 2. A parking brake actuating device as in claim 1 further comprising a flange component, at least one of said rotary lever input part and said rotary lever output part being rotatably mounted in said flange component.
a rotary lever arrangement which controls engagement of the blocking member with the counter-blocking member, said rotary lever arrangement comprising a rotary lever input part and a rotary lever output part which are rotatable relative to each other along an idle path when said blocking member is not engaged by said counter-blocking member, and a locking arrangement by which a plurality of defined switching states can be selected, said locking arrangement comprising at least one pretensioned locking device and a plurality of counter-locking devices, said locking device cooperating with a respective said counter-locking device in each of said switching states, and a restoration element which reverses said idle path when said counter-blocking member engages said blocking member. 19. A parking brake actuating device as in claim 18 further comprising a flange component, at least one of said rotary lever input part and said rotary lever output part being rotatably mounted in said flange component.
a rotary lever arrangement which controls engagement of the blocking member with the counter-blocking member, said rotary lever arrangement comprising a rotary lever input part and a rotary lever output part which are rotatable relative to each other along an idle path when said blocking member is not engaged by said counter-blocking member, wherein the rotary lever input part and the rotary lever output part each have a pair of coupling surfaces which cooperate to define the idle path and enable a switching movement between the rotary lever input part and the rotary lever output part, and a restoration element which reverses said idle path when said counter-blocking member engages said blocking member. 37. A parking brake actuating arrangement as in claim 36 wherein one of the rotary lever input part and the rotary lever output part comprises a segment-shaped cutout in the circumferential direction, said cut-out defining the pair of coupling surfaces of said one of the rotary input part and the rotary output part.
SUMMARY OF THE INVENTION On this basis, it is the object of the invention to provide a compact, universally applicable parking brake actuating device which is easy to mount and which overcomes the disadvantages of the prior art mentioned above.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of the basic construction of a parking brake using a parking brake actuating device according to the invention;
DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS FIG. 1 shows a parking brake actuating device 1, by way of example, in a parking brake arrangement 3 in a motor vehicle. When a driver moves the selector device 5 into a parking position, an actuating force is transmitted by means of a transmission element 7, in this case, a mechanism, to an input part 9 of a rotary lever arrangement 11, wherein a torque is generated at the latter. The rotary lever arrangement 11 further has a rotary lever output part 13. The object of the rotary lever arrangement 11 is to further convey the torque introduced via the rotary lever input part 9 to the rotary lever output part 13, wherein the rotary lever output part 13 executes a rotational movement only when a counter-force F which is dependent on the position of a blocking member relative to a counter-blocking member of the parking brake arrangement 3 is overcome. In the example, the blocking member is a toothed parking brake wheel 15 and the counter-blocking member is a pawl 17 which is mounted in a rotatable manner so as to be fixed with respect to the housing and which has a projection 19 which can engage in a gap of the parking brake wheel 15 and accordingly prevents the motor vehicle from rolling away by means of a positive engagement. The articulation of the pawl 17 is carried out by means of a cam roller 21 which is connected with the rotary lever output part 13. In case a tooth of the blocking wheel 15 and the projection 19 of the pawl 17 are located across from one another radially when the parking brake actuating device 1 is actuated, there is a sufficiently large counter-force F available which blocks a movement of the rotary lever output part 13 with respect to the pawl 17. Otherwise, there is only a counter-force F which is caused by the action of the restoring element 23 and which enables a movement of the rotary lever output part 13 and, therefore, makes it possible for the pawl 17 to lock into a gap of the parking brake wheel 15.
When the parking brake actuating device 1 a is actuated corresponding to the swiveling direction indicated by an arrow in FIG. 2, a torque introduced via the rotary lever input part 9 a is conducted via the leg spring 53 and further to the rotary lever output part 13 a connected to the latter. When the projection 19 of the locking pawl 17 is located over a gap of the parking brake wheel 15 as shown in FIG. 1, the rotary lever output part 13 a in FIG. 2 rotates synchronous with the rotary lever input part 9 a, wherein the cam roller 21 a arranged at the roller lever 57 rolls on the locking pawl 17 and brings the latter into engagement with the parking brake wheel 15. However, when a sufficiently large counter-force F occurs in the course of the rotating movement of the rotary lever output part 13 a, above all when the projection 19 and a tooth of the parking brake wheel 15 are located radially opposite one another and an engagement is not possible, the synchronous rotational movement of the rotary lever output part 13 a with the rotary lever input part 9 a is blocked and further rotation of the rotary lever input part 9 a causes a tensioning of the leg spring 53 while traveling the idle path. During this period of time, the ratchet wheel 15 continues to rotate until the next possible locking position is reached. As soon as this happens, the counter-force F decreases and the rotary lever output part 13 a can continue to rotate in the swiveling direction accompanied by simultaneous relaxation of the leg spring 53, and the projection 19 locks into a gap in the ratchet wheel 15. At the same time, the rotary lever output part 13 a is restored to its initial position with respect to the input part 11 a. When the parking brake actuating device 1 a is actuated corresponding to the swiveling direction indicated by an arrow in FIG. 2, a torque introduced via the rotary lever input part 9 a is conducted via the leg spring 53 and further to the rotary lever output part 13 a connected to the latter. When the projection 19 of the locking pawl 17 is located over a gap of the parking brake wheel 15 as shown in FIG. 1, the rotary lever output part 13 a in FIG. 2 rotates synchronous with the rotary lever input part 9 a, wherein the cam roller 21 a arranged at the roller lever 57 rolls on the locking pawl 17 and brings the latter into engagement with the parking brake wheel 15. However, when a sufficiently large counter-force F occurs in the course of the rotating movement of the rotary lever output part 13 a, above all when the projection 19 and a tooth of the parking brake wheel 15 are located radially opposite one another and an engagement is not possible, the synchronous rotational movement of the rotary lever output part 13 a with the rotary lever input part 9 a is blocked and further rotation of the rotary lever input part 9 a causes a tensioning of the leg spring 53 while traveling the idle path. During this period of time, the ratchet wheel 15 continues to rotate until the next possible locking position is reached. As soon as this happens, the counter-force F decreases and the rotary lever output part 13 a can continue to rotate in the swiveling direction accompanied by simultaneous relaxation of the leg spring 53, and the projection 19 locks into a gap in the ratchet wheel 15. At the same time, the rotary lever output part 13 a is restored to its initial position with respect to the input part 11 a. The rotary lever input part 9 a is supported by a shaft portion 61 so as to be rotatable in a flange component part 63 and is secured against axial movement by a retaining ring 65 and a shoulder 67. In addition, sealing means 69 formed as a ring are provided for preventing liquid from passing between the parts 63 and 9 a. The flange component part 63 is arranged so as to be stationary at a through-opening 71 of a housing 73 of the parking brake arrangement 1 a by means of a detachable connection 75, for example, the screw connection shown in the drawing. In this case, also, sealing means, not shown, can be provided between the flange component part 63 and the housing 73. The through-opening 71 is dimensioned in such a way that the rotary lever output part 13 a can be guided through it. Alternatively, it would also be possible for the rotary lever input part 9 a by itself or the input part and output part of the rotary lever arrangement 11 a, 13 a together to be supported in a flange component part. The rotary lever arrangement 11 a can be preassembled as a constructional unit and can be positioned in a working connection with the blocking member from the outside through the through-opening 71 of the housing 73.
According to a further feature of the invention, a locking arrangement 77 is formed at the rotary lever arrangement 1 a by which a plurality of defined switching states can be fixed successively in time, according to the preset of a driver, by means of a deflection of the connection piece 55 and of the rotary lever input part 9 a connected with the latter. The maximum deflection causes the parking position to be occupied and different driving gears can be occupied by means of lesser deflections. For this purpose, the locking arrangement 77 comprises a pretensioned locking device 79 in the form of a spring-loaded ball which enters into a connection with a counter-locking device 81 formed at the flange component part as a trough when a defined switching state is reached. The spring 83 is supported by the connection piece 55 in the example; however, this can also be carried out by means of the rotary lever input part 9 a. It is essential that the locking device or locking devices 79 and the counter-locking device or counter-locking devices 81 are positioned at the rotary lever input part 9 a and at a part which is stationary with respect to the latter. In the example, the locking devices 79 and counter-locking devices 81 are formed at identical pitch circles of the flange component part 63 and the connection piece 55 and rotary lever input part 9 a. A further variant of a locking arrangement 77 d is shown schematically in FIG. 5. Three locking devices 79 d are arranged at a distance from one another axially at the flange component part 63 d. The counter-locking devices 81 d are likewise spaced apart axially but, in addition, are arranged at the rotary lever input part 9 d so as to be offset in circumferential direction. The locking arrangement 77 d can be built in a very compact manner by means of this construction and a plurality of switching states can be secured successively by means of only slight deflections of the connection piece 55 in FIG. 2.
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