Operating device for brake system

Abstract

The present invention relates to an operating device (1) for a braking system, comprising an electric motor (10) configured to drive a drive shaft (11) journalled for rotation about a rotation axis (12), a housing (6) and a master brake cylinder (2) rigidly connected to the housing (6), in which at least one hydraulic piston is slidably supported, the drive shaft (11) being connected to the hydraulic piston such that the hydraulic piston is slidable by rotation of the drive shaft (11). [Solution] The electric motor (10) is disposed within the housing (6) such that a rigid connection between the master brake cylinder (2) and the housing (6) is provided, at least in part, by the drive shaft (11).

Description

[Technical field]

[0001] The present invention relates to an operating device for a braking system, the operating device having an electric motor configured to drive a drive shaft journaled for rotation about a rotation axis, a housing and a master brake cylinder rigidly connected to the housing, at least one hydraulic piston being slidably journaled in the master brake cylinder, the drive shaft being connected to the hydraulic piston such that the hydraulic piston is slidable by rotation of the drive shaft.

[0002] The invention also relates to a braking system equipped with an actuating device of this type. [Background technology]

[0003] A hydraulic brake system of a motor vehicle usually has a number of friction brake devices. To actuate the friction brake devices, an actuation device is provided which generally comprises a master brake cylinder, in which a hydraulic piston is slidably supported. The master brake cylinder is fluidically connected to the slave cylinders of the friction brake devices so that the friction brake devices can be actuated by the sliding of the hydraulic piston.

[0004] Electromechanical actuating devices are increasingly being fitted to motor vehicle structures. Such an actuating device is known, for example, from DE 10 200 43 336. The actuating device has an electric motor, which is designed to drive a drive shaft that is rotatably journalled about its axis of rotation. The drive shaft is connected to a hydraulic piston in such a way that the hydraulic piston can be slid by the rotation of the drive shaft. The hydraulic piston can thus be slid by the electric motor with the drive shaft, so that the friction brake device can finally be actuated by the electric motor. Furthermore, the actuating device has a housing, to which the master brake cylinder is rigidly connected. In general, in known electromechanical actuating devices, the electric motor is arranged outside the housing to which the master brake cylinder is rigidly connected. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2017108228 Brochure Summary of the Invention Effect of the Invention

[0006] The actuating device according to the invention with the features of claim 1 has the advantage that the actuating device is particularly compact, which results in a space-saving design of the actuating device. For this purpose, according to the invention, the electric motor is arranged in a housing, and the rigid connection between the master brake cylinder and the housing is provided at least in part by the drive shaft. That is to say, the electric motor is arranged in a housing that is rigidly connected to the master brake cylinder according to the invention. Due to such an arrangement in the housing, the electric motor is protected by the housing, so that an additional motor housing can be dispensed with. In a preferred form, the electric motor is designed without a motor housing. This results in a cost saving in addition to a space saving for the actuating device. According to the invention, the master brake cylinder is rigidly connected to the housing or is rigidly fixed to the housing. A rigid connection between the two components means in this case that a relative movement of these components with respect to one another is not possible. In this case, the rigid connection between the master brake cylinder and the housing is designed, for example, to transmit both axial and radial forces. If the terms "axial" and "radial" are used in this specification, these terms relate to the axis of rotation of the drive shaft, unless a different connection is explicitly stated for these terms. An axial force may be understood as a force aligned parallel to the axis of rotation. Correspondingly, a radial force may be understood as a force aligned perpendicular to the axis of rotation. In a preferred form, the hydraulic piston is slidable along a sliding axis aligned parallel to the axis of rotation of the drive shaft. According to the invention, the rigid connection between the housing and the master brake cylinder is at least partially provided or generated by the drive shaft. For example, when the master brake cylinder is loaded with an axial force, this axial force is at least partially transmitted to the housing by the drive shaft. Since the rigid connection between the housing and the master brake cylinder is at least partially provided by the drive shaft, other elements, i.e. other elements which in general in known actuation devices provide a rigid connection in part, can be omitted.This results in a space-saving construction of the operating device according to the invention.

[0007] In a preferred embodiment, the actuation device has a first bearing configured for transmitting axial forces, the first bearing having a first bearing ring and a second bearing ring, the first bearing ring being rigidly connected to the master brake cylinder and the second bearing ring being rigidly connected to the drive shaft. The rigid connection between the housing and the master brake cylinder is at least partially provided by the first bearing. When the master brake cylinder is loaded with an axial force, the axial force is transmitted to the drive shaft by the first bearing ring and the second bearing ring. By means of the first bearing, a sufficiently high axial force can be transmitted to the drive shaft, despite the drive shaft being rotatably journalled. In a preferred embodiment, the first bearing ring is an outer bearing ring of the first bearing. Correspondingly, the second bearing ring is an inner bearing ring of the first bearing. In a preferred embodiment, the second bearing ring is connected to the drive shaft by a press fit. In a preferred embodiment, the second bearing ring is connected to the drive shaft by a first end section of the drive shaft. Particularly preferably, the first bearing is arranged outside the housing. Correspondingly, the drive shaft has a section which protrudes from the housing.

[0008] In a preferred embodiment, the actuation device has a second bearing configured for transmitting axial forces, the second bearing having a third bearing ring and a fourth bearing ring, the third bearing ring being fixedly arranged in the housing and the fourth bearing ring being rigidly connected to the drive shaft. The rigid connection between the housing and the master brake cylinder is at least partially provided by the second bearing. When the drive shaft is loaded with an axial force, this axial force is transmitted to the housing by the fourth bearing ring and the third bearing ring. By means of the second bearing, a sufficiently high axial force can be transmitted from the drive shaft to the housing, despite the drive shaft being rotatably supported. In a preferred embodiment, the third bearing ring is an outer bearing ring of the second bearing. Correspondingly, the fourth bearing ring is an inner bearing ring of the second bearing. In a preferred embodiment, the fourth bearing ring is connected to the drive shaft by a press fit. In a preferred embodiment, the fourth bearing ring is connected to the second end section of the drive shaft. If a first bearing is connected to the drive shaft in the region of a first end section of the drive shaft and a second bearing in the region of a second end section of the drive shaft, the electric motor is arranged axially between the first bearing on one side and the second bearing on the other side, whereby a rigid and rotatable bearing of the drive shaft is obtained by means of two bearings.

[0009] According to a preferred embodiment, the first bearing and / or the second bearing are configured as rolling element bearings, in particular as tapered roller bearings. With this type of bearing, on the one hand, a friction-free rotation of the drive shaft is possible. On the other hand, sufficiently high axial forces can be transmitted with this type of bearing. With a view to transmitting higher axial forces, it is particularly preferred if the bearings are configured as tapered roller bearings.

[0010] In a preferred embodiment, the housing has a cup-shaped recess, in which the second bearing is arranged. Due to the presence of the recess and the arrangement of the second bearing in the recess, a particularly solid connection between the third bearing ring and the housing is obtained. Preferably, the third bearing ring is pressed into the recess, i.e. the third bearing ring is connected to the housing by a press fit acting between the peripheral wall of the recess and the peripheral wall of the third bearing ring.

[0011] In a preferred embodiment, the master brake cylinder has a connection flange, and the first bearing ring is rigidly connected to the connection flange. The connection flange provides a rigid connection between the master brake cylinder and the housing. In a preferred embodiment, the connection flange has an axial opening, and the first bearing is arranged in the axial opening. In a preferred embodiment, the first bearing ring is connected to the connection flange by a press fit acting between a peripheral wall of the axial opening and a peripheral wall of the first bearing ring.

[0012] In a preferred embodiment, the actuation device has a control unit for controlling the electric motor, and the connection flange is arranged in the axial direction between the electric motor on one side and the control unit on the other side. Such an arrangement of the control unit is particularly preferred. On the one hand, the control unit arranged in this way is located spatially close to the electric motor, so that it is technically simple to electrically connect the control unit to the electric motor. On the other hand, due to its spatial location close to the connection flange, the control unit is heated or cooled by the connection flange during operation. In a preferred embodiment, the control unit, in particular the control unit housing of the control unit, abuts directly against the connection flange in the axial direction.

[0013] According to a preferred embodiment, the control unit is electrically connected to the motor coil of the electric motor by at least one electrical wiring, and the connection flange has an axial opening through which the wiring extends, i.e. the wiring extends through the connection flange, whereby the wiring is protected by the connection flange and the electrical connection between the control unit and the motor coil is simplified by not having to guide the wiring around the connection flange.

[0014] In a preferred embodiment, the actuating device has at least one locking ring which engages radially in a circumferential groove of the drive shaft for axially fixing the drive shaft. This increases the level of the axial forces that can be transmitted by the drive shaft. In a preferred embodiment, the locking ring bears directly in the axial direction against the second bearing ring of the first bearing or against the fourth bearing ring of the second bearing. Particularly preferably, the locking ring is arranged on the side of the first bearing opposite the second bearing and bears directly in the axial direction against the second bearing ring of the first bearing. In a preferred embodiment, the actuating device has another locking ring which engages radially in another circumferential groove of the drive shaft for axially fixing the drive shaft and which is arranged on the side of the second bearing opposite the first bearing and bears directly in the axial direction against the fourth bearing ring of the second bearing.

[0015] In a preferred embodiment, the actuating device has an actuating member which is slidably guided in the housing, the guiding of the actuating member being provided at least in part by the electric motor. An actuating member may be understood as a member which is connected to the hydraulic piston in such a way that the hydraulic piston is slidable by the sliding of the actuating member. In a preferred embodiment, the drive shaft is connected to the hydraulic piston by the actuating member. Since the guiding of the actuating member is provided at least in part by the electric motor, the number of further components required for the guiding of the actuating member is small.

[0016] In a preferred embodiment, the actuating device has an anti-rotation plate rigidly connected to the actuating member, with a part of the motor that is fixed to the housing having guide projections that engage radially into recesses of the anti-rotation plate for guiding the actuating member, thereby ensuring reliable guiding of the actuating member. In a preferred embodiment, the guide projections have a coating that reduces friction between the guide projections and the anti-rotation plate. In another embodiment, the anti-rotation plate has guide projections that engage radially into recesses of a part that is fixed to the housing of the motor for guiding the actuating member.

[0017] In a preferred embodiment, the actuating device has a tension rod, and the rigid connection between the housing and the master brake cylinder and the guiding of the actuating member are each partially provided by the tension rod. The provision of the tension rod increases the stability of the rigid connection between the housing and the master brake cylinder and the stability of the guiding of the actuating member. In a preferred embodiment, the actuating device has exactly one tension rod configured as described above.

[0018] According to a preferred embodiment, the longitudinal center axis of the master brake cylinder, the longitudinal center axis of the tension rod and the rotation axis of the drive shaft are aligned parallel to one another and lie in the same plane, with the master brake cylinder being radially disposed between the tension rod on one side and the drive shaft on the other side, such that the axial force acting on the master brake cylinder is preferably divided between the tension rod and the drive shaft.

[0019] The braking system according to the invention having the features of claim 14 is distinguished by an actuating device according to the invention, from which the aforementioned advantages are also obtained. Further preferred features and feature combinations can be derived from the description and the claims. In a preferred form, the braking system has at least one friction brake device, which is fluidically connected to the master brake cylinder in such a way that the friction brake device can be actuated by the sliding of a hydraulic piston. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a cross-sectional view of an operating device for a brake device. [Diagram 2] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The present invention will be described in detail below with reference to the drawings.

[0022] FIG. 1 shows a cross-sectional view of an actuating device 1 for a hydraulic braking system of a motor vehicle. The actuating device 1 has a master brake cylinder 2, in which at least one hydraulic piston, not shown, is mounted so as to be axially slidable along a sliding axis 3. In this case, the master brake cylinder 2 is a tandem master cylinder 2. Correspondingly, two hydraulic pistons are mounted in the master brake cylinder 2 one behind the other so as to be axially slidable. In this case, the sliding axis 3 corresponds to the longitudinal central axis 3 of the master brake cylinder 2. If the actuating device 1 is installed in the motor vehicle as part of a brake system, the master brake cylinder 2 is connected by several hydraulic connections, although only one hydraulic connection 4 is shown in FIG. 1, to several slave cylinders of the friction brake system of the brake system, so that the friction brake system can be actuated by the actuating device 5 by the sliding of the hydraulic pistons.

[0023] The operating device 1 further comprises a housing 6. The housing 6 is made up of several parts. Here, the housing 6 comprises a base body 7 and a cover 8. The base body 7 and the cover 8 are firmly connected to each other by fastening means 9.

[0024] The operating device 1 further comprises an electric motor 10, which is arranged in the housing 6 and fixed thereto. The electric motor 10 is designed to drive a drive shaft 11, which is rotatably journalled about a rotation axis 12. In this case, the rotation axis 12 is aligned parallel to the sliding axis 3. The drive shaft 11 projects axially beyond the electric motor 10 on both sides. In this case, the drive shaft 11 has a first end section 13, which is arranged axially on one side of the electric motor 10, and a second end section 14, which is arranged axially on the other side of the electric motor 10. For rotatably journalling the drive shaft 11, a first bearing 15 and a second bearing 16 are provided. In this case, the first bearing 15 journals the first end section 13 of the drive shaft 11. The second bearing 16 journals the second end section 14 of the drive shaft 11. In this case, the bearings 15 and 16 are designed as rolling element bearings 15 and 16.

[0025] The master brake cylinder 2 has a connection flange 17, which rests in the axial direction against the outside of a wall 18 of the cover 8 aligned perpendicularly to the axis of rotation 12. The master brake cylinder 2 is rigidly connected to the housing 6 or is rigidly fixed thereto. In this case, a connection is provided which acts between the master brake cylinder 2 on the one side and the housing 6 on the other side, which can transmit both axial and radial forces. If the master brake cylinder 2 is loaded with an axial force acting in the actuation direction 5, for example, the axial force is transmitted to the housing 6.

[0026] In this case, the rigid connection between the housing 6 and the master brake cylinder 2 is provided partly by the drive shaft 11. The first bearing 15 and the second bearing 16 are designed for transmitting both axial and radial forces. For this purpose, the first bearing 15 has a first bearing ring 19 and a second bearing ring 20, which can rotate relative to one another. The first bearing ring 19 is rigidly connected to the master brake cylinder 2. Here, the first bearing ring 19 is pressed into a first axial opening 21 of the connection flange 17. The second bearing ring 20 is rigidly connected to the drive shaft 11, which is pressed into the second bearing ring 20. The second bearing 16 has a third bearing ring 22 and a fourth bearing ring 23, which can rotate relative to one another. The third bearing ring 22 is rigidly connected to the housing 6. Here, the third bearing ring 22 is pressed into a cup-shaped recess 24 in the base body 7 of the housing 6. The fourth bearing ring 23 is rigidly connected to the drive shaft 11, which is pressed into the fourth bearing ring 23. This means that when the master brake cylinder 2 is loaded with an axial force acting on the actuating device 5, this axial force is transmitted to the housing 6 by the first bearing ring 19, the second bearing ring 20, the drive shaft 11, the fourth bearing ring 23 and the third bearing ring 22.

[0027] Furthermore, the actuating device 1 comprises a tensile rod 25, which is arranged such that a longitudinal central axis 26 of the tensile rod 25 is aligned parallel to the axis of rotation 12. A rigid connection between the master brake cylinder 2 and the housing 6 is also provided in part by the tensile rod 25. For this purpose, the tensile rod 25 extends axially through the housing 6 and the connecting flange 17 and is axially fixed thereto by means of an axial stop 27.

[0028] Furthermore, the operating device 1 has an operating member 28 slidably guided in the axial direction. The operating member 28 is connected to a hydraulic piston such that the hydraulic piston is slidable by the sliding of the operating member 28. A rotation prevention plate 29 is rigidly connected to the operating member 28 and is slidable together with the operating member 28. The operating device 1 also has a return spring 30, which is supported on one axial side by the master brake cylinder 2 and on the other axial side by the operating member 28 or a member rigidly connected to the operating member 28.

[0029] The drive shaft 11 is operatively connected to the operating member 28 such that the operating member 28 can be slid by the rotation of the drive shaft 11. In this case, the hydraulic piston can be slid by the electric motor 10. For this purpose, the operating device 1 has a transmission 31. The transmission 31 has a first gear wheel 32 which is connected to the drive shaft 11 in a rotationally immovable manner. The first gear wheel 32 is arranged axially between the electric motor 10 on one side and the second bearing 16 on the other side. For this purpose, the first gear wheel 32 is designed to drive a spindle nut 34 of the transmission 31 by means of at least one further gear wheel 33 of the transmission 31. The external thread of the operating member 28 meshes with an internal thread of the spindle nut 34 such that the operating member 28 can be slid by the rotation of the spindle nut 34.

[0030] The guidance of the actuating element 28 is partly provided by the electric motor 10. Here, a component fixed to the housing of the electric motor 10, for example a carrier of the electric motor 10, has an axially extending guide projection 35. The anti-rotation plate 30 has a recess 36 which extends axially through the anti-rotation plate 29. The guide projection 35 engages radially into the recess 36 for guiding the actuating element 28. The guide projection 35 has a coating, not shown in FIG. 1, which reduces friction between the guide projection 35 and the anti-rotation plate 30. According to a further embodiment, the anti-rotation plate 30 has a guide projection which engages radially into an axially extending recess of the electric motor 10 for guiding the actuating element 28.

[0031] Furthermore, guiding of the operating member 28 is partly provided by the tensile rod 25. For this purpose, the anti-rotation plate 30 has an axial opening 37 through which the tensile rod 25 for guiding the operating member 28 is axially engaged.

[0032] Furthermore, the actuation device 1 has a control unit 38 for controlling the electric motor 10. The control unit 38 is designed for controlling the electric motor 10, for example, as a function of a sensor signal of an actuation sensor (not shown) of the actuation device 1. The connection flange 17 is arranged axially between the electric motor 10 on the one side and the control unit 38 on the other side. In this case, the control unit 38 bears directly axially against the connection flange 16.

[0033] The connection flange 17 has a second axial opening 39 which is axially aligned with the axial opening 41 of the cover 8. The control unit 38 is electrically connected to the motor coil of the electric motor 10 by a number of electrical wirings 40. The electrical wirings 40 extend through the second axial opening 39 of the connection flange 17 and the axial opening 41 of the cover 8.

[0034] For monitoring the angle of rotation of the drive shaft 11, a magnet element 42 is provided, which is connected to the free end of the first end section 13 of the drive shaft 11 so as to be non-rotatable relative to it. Furthermore, a receiver (not shown) is provided, which is designed to detect the magnetic field generated by the magnet element 42. For this purpose, the receiver faces the magnet element 42, for example radially or axially.

[0035] For axial fixing of the drive shaft 11, a fixing ring 43 is provided. The fixing ring 43 engages radially in a circumferential groove of the drive shaft 11. In this case, the fixing ring 43 is arranged axially between the magnet element 42 on one side and the first bearing 15 on the other side and bears directly axially against the second bearing ring 20. According to a further embodiment, the drive shaft 11 protrudes axially beyond the second bearing 16. Preferably, in this embodiment, a further fixing ring is provided, which is arranged on the side of the second bearing 16 opposite the first bearing 15 and bears directly axially against the fourth bearing ring 23. In a preferred manner, the further fixing ring engages radially in a further circumferential groove of the drive shaft 11.

[0036] Fig. 2 shows a plan view of the operating device 1. As can be seen from Fig. 2, the master brake cylinder 2, the tensile rod 25 and the drive shaft 11 are arranged in such a way that the longitudinal central axis 26 of the tensile rod 25, the longitudinal central axis 3 of the master brake cylinder 2 and the rotation axis 12 of the drive shaft 11 lie in the same plane. In this case, the master brake cylinder 2 is disposed radially between the tensile rod 25 and the drive shaft 11. Furthermore, the longitudinal central axis 26 of the tensile rod 25 and the rotation axis 12 of the drive shaft 11 are spaced the same distance from the longitudinal central axis 3 of the master brake cylinder 2 in the radial direction.

[0037] Since the drive shaft 11 provides a rigid connection between the master brake cylinder 2 and the housing 6, and the electric motor 6 partially provides a guide for the actuating member 28, a separate tension rod which would generally provide a rigid connection and guide together with the tension rod 25 can be omitted. This allows the actuating device 1 to be constructed in an overall space-saving manner, as shown in FIG. 2. [Explanation of symbols]

[0038] 1 Operating device 2 Master brake cylinder, tandem master cylinder 3 Sliding axis, vertical center axis 4 Hydraulic Connections 5 Operation direction 6. Housing 7 Base 8 Cover 9 Fixing means 10 Electric motor 11 Drive shaft 12 Rotation axis 13 First end section 14 Second End Section 15 First bearing, rolling element bearing 16 Second bearing, rolling element bearing 17 Connection flange 18 Wall 19 First bearing ring 20 Second bearing ring 21 first axial opening 22 3rd bearing ring 23 Fourth bearing ring 24 Cup-shaped recess 25 Tensile Rod 26 Vertical center axis 27 Axial stopper 28 Operating member 29 Anti-rotation plate 30 Return spring 31 Transmission 32 First Gear 33 Different Gears 34 Spindle nut 35 Guide protrusion 36 Notch 37 Axial opening 38 Control Unit 39 Second axial opening 40 Electrical Wiring 41 Axial opening of cover 8 42 Magnet Element 43 Fixing ring

Claims

1. An operating device (1) for a brake system, comprising: an electric motor (10) configured to drive a drive shaft (11) journalled for rotation about a rotation axis (12); a housing (6); and a master brake cylinder (2) rigidly connected to the housing (6), in which at least one hydraulic piston is journalled for sliding movement along a sliding axis aligned parallel to the rotation axis (12), the drive shaft (11) being connected to the hydraulic piston such that the hydraulic piston is slidable by rotation of the drive shaft (11), An operating device (1) for a brake system, characterized in that the electric motor (10) is arranged in the housing (6), and a rigid connection between the master brake cylinder (2) and the housing (6) is at least partially provided by the drive shaft (11).

2. 2. The operating device according to claim 1, further comprising a first bearing (15) configured for transmitting axial forces, the first bearing (15) having a first bearing ring (19) and a second bearing ring (20), the first bearing ring (19) being rigidly connected to the master brake cylinder (2) and the second bearing ring (20) being rigidly connected to the drive shaft (11).

3. 3. The operating device according to claim 1 or 2, characterized in that a second bearing (16) configured for transmitting axial forces is provided, the second bearing (16) having a third bearing ring (22) and a fourth bearing ring (23), the third bearing ring (22) being arranged fixedly in the housing and the fourth bearing ring (23) being rigidly connected to the drive shaft (11).

4. 3. An actuating device according to claim 2, characterized in that the first bearing (15) is designed as a rolling element bearing, in particular as a tapered roller bearing.

5. 4. An actuating device according to claim 3, characterized in that the second bearing (16) is designed as a rolling element bearing, in particular as a tapered roller bearing.

6. 6. An operating device according to claim 3 or 5, characterized in that the housing (6) has a cup-shaped recess (24) and the second bearing (16) is arranged in the recess (24).

7. 5. An actuating device according to claim 2 or 4, characterized in that the master brake cylinder (2) has a connection flange (17), and the first bearing ring (19) is rigidly connected to the connection flange (17).

8. 8. An operating device according to claim 7, characterized in that a control unit (38) is provided for controlling the electric motor (10), and the connection flange (17) is arranged axially between the electric motor (10) on one side and the control unit (38) on the other side.

9. 9. The operating device according to claim 8, characterized in that the control unit (38) is electrically connected to the motor coil of the electric motor (10) by at least one electrical wiring (40), and the connection flange (17) has an axial opening (39) through which the electrical wiring (40) extends.

10. 10. The actuation device according to claim 1, further comprising at least one fixing ring (43) which engages radially in a circumferential groove of the drive shaft (11) for axial fixing of the drive shaft (11).

11. 11. The operating device according to claim 1, further comprising an operating member (28) which is slidably guided in the housing (6), the guidance of the operating member (28) being provided at least in part by the electric motor (10).

12. 12. The operating device according to claim 11, further comprising an anti-rotation plate (29) rigidly connected to the operating member (28), and a member fixed to the housing of the electric motor (10) has a guide projection (35) which radially engages in a notch (36) of the anti-rotation plate (29) to guide the operating member (28).

13. 13. The actuating device according to claim 11 or 12, characterized in that the actuating device (1) comprises a tensile rod (25), and the rigid connection between the housing (6) and the master brake cylinder (2) as well as the guidance of the actuating member (28) are each partially provided by the tensile rod (25).

14. 14. The actuating device according to claim 13, characterized in that the longitudinal central axis (3) of the master brake cylinder (2), the longitudinal central axis (26) of the tensile rod (25) and the rotation axis (12) of the drive shaft (11) are aligned parallel to one another and lie in the same plane, and the master brake cylinder (2) is disposed radially between the tensile rod (25) on one side and the drive shaft (11) on the other side.

15. A braking system, characterized in that it is provided with an actuating device (1) according to any one of claims 1 to 14.

Images