DE102021119373A1 - Brake force distribution device, brake assembly with the brake force distribution device and vehicle with the brake assembly and / or the brake force distribution device - Google Patents

Abstract

In the case of muscle-operated vehicles, such as bicycles, disc brakes are often used, these being hydraulically operated. A brake device is almost always arranged on the handlebars of the vehicle, which applies the corresponding hydraulic force in order to actuate the disc brake. A brake force distribution device 1 is proposed with a cable device 7 for transferring a mechanical braking force into the brake force distribution device 1 via a cable 3, with a first hydraulic device 8a for generating a first hydraulic pressure, the first hydraulic device 8a being actuatable via the cable pull device 7 in order to at least partially convert the mechanical braking force into the first hydraulic pressure, and having a second hydraulic device 8b for generating a second hydraulic pressure, wherein the second hydraulic device 8b can be actuated via the cable pull device 7 in order to at least partially convert the mechanical braking force into the second hydraulic pressure.

Description

The invention relates to a brake force distribution device with the features of the preamble of claim 1. The invention also relates to a brake assembly with the brake force distribution device

In the case of muscle-operated vehicles, such as bicycles, disc brakes are often used, these being hydraulically operated. A braking device is almost always arranged on the handlebars of the vehicle, which applies the corresponding hydraulic force in order to actuate the disc brake.

An alternative is proposed in publication DE 20 2010 006 0171 U1, which represents the closest prior art. This publication discloses a disc brake converter with an open system for bicycles, in particular bicycles with drop handlebars, which converts the manual force generated by a brake lever into hydraulic pressure via a cable pull in order to actuate a hydraulic disc brake as well as a rim brake.

The invention is based on the object of proposing a space-optimized brake force distribution device with extended functionality.

This object is achieved by a brake force distribution device having the features of claim 1, by a brake assembly having the features of claim 9 and by a vehicle having the features of 10. Preferred or advantageous embodiments of the invention result from the dependent claims, the following description and the attached figures.

The subject matter of the invention is a brake force distribution device, the brake force distribution device being suitable and/or designed for a vehicle, in particular a muscle-operated vehicle. In particular, the vehicle is a micro-mobility vehicle with three or more wheels. In particular, the vehicle has at least one axle with two wheels. Alternatively or additionally, the vehicle is designed as a small electric vehicle. The small electric vehicle preferably has more than two wheels, preferably exactly three or four wheels. In particular, a small electric vehicle is to be understood as meaning a motor vehicle with an electric drive in accordance with the Small Electric Vehicles Ordinance (eKFV). For example, the small electric vehicle is designed as a multi-track electric scooter, also known as an electric scooter or e-scooter, as a rickshaw or as a cabin scooter.

The brake force distribution device has a cable pull device for transferring a mechanical braking force into the brake force distribution device via a cable pull. The cable pull is designed in particular as a Bowden cable. The cable pull optionally forms part of the cable pull device and/or the brake force distribution device. For example, the vehicle has an actuating device, whereby a mechanical braking force can be introduced by a user via the handbrake lever, with the mechanical braking force being able to be transferred via the cable pull to the cable pull device and thus to the brake force distribution device.

The brake force distribution device has a first hydraulic device for generating a first hydraulic pressure. The first hydraulic pressure is used in particular to actuate a first brake-actuating device. In particular, the hydraulic pressure in the brake receiving device is converted into a first hydraulic braking force. The first hydraulic device can be actuated via the cable pull device in order to at least partially convert the mechanical braking force into the first hydraulic pressure. The first hydraulic device is thus actuated via the mechanical braking force in order to generate the first hydraulic pressure, which is converted into the first hydraulic braking force.

In the context of the invention, it is proposed that the brake force distribution device has a second hydraulic device for generating a second hydraulic pressure. The second hydraulic device can be actuated via the cable pull device, with the mechanical braking force being at least partially converted into the second hydraulic pressure. In particular, the first hydraulic device and the second hydraulic device are mechanically coupled and/or hydraulically separate from one another and/or independent via the cable pull device. Hydraulic fluid is arranged in the hydraulic devices.

It is an aspect of the invention that three or more wheeled micro-mobility vehicles are braked via hydraulic disc brakes, with two disc brakes arranged on the same axle preferably being actuated by a user using a single brake lever. Thus, the brake transmitter has to supply both brake receivers with fluid and/or hydraulic pressure at the same time. In principle, a large pressure chamber would have to be provided, which is disadvantageous with regard to optimizing the installation space of such a brake transmitter.

According to the invention, a brake force distributor device is proposed which forms a semi-hydraulic brake force distributor which is actuated by a cable pull and which supplies at least or precisely two separate brake slave devices with fluid and/or hydraulic pressure. Thanks to the cable, the installation space of the brake force distribution device and thus its ability to be integrated can be optimized. It is also possible that, for example, a conventional mechanical brake lever can be used as the actuating device for introducing the mechanical braking force into the brake force distribution device.

In a preferred embodiment of the invention, the first hydraulic device has a first cylinder and a first working piston, the first working piston being arranged displaceably in the first cylinder. The second hydraulic device has a second cylinder and a second working piston, which is slidably arranged in the second cylinder. Preferably, the first and/or the second cylinder have a circular cross-section. The first and the second cylinder are arranged parallel and/or in the same direction to each other. Due to the parallel arrangement of the cylinders, a very space-saving design is achieved. Because they are aligned, the working pistons are each arranged at the same end, so that they can be actuated from a common side, which in turn promotes a reduction in installation space.

In a preferred development of the invention, the cable pull device has a pull piston. Furthermore, a guide channel is provided, with the pulling piston being arranged in the guide channel so that it can be displaced in a pulling direction by the mechanical braking force. Thus, the pull piston moves in the pull direction when the mechanical braking force is applied. In principle, the pulling piston can have any desired cross section. In particular, it is not necessary for the pulling piston to be arranged in a fluid-tight manner in the guide channel.

The brake force distribution device optionally has a base body, with the cylinders and the guide channel being introduced into the base body. In particular, the brake force distribution device is designed as a self-retaining assembly. The base body can be designed in one piece or in several pieces. For example, the cylinders and/or the guide channel are introduced separately into the base body.

The cable pull device has a distribution module, the distribution module being operatively connected to the traction piston and transmitting the mechanical braking force from the traction piston to the working piston. In particular, the distribution module is connected to the pulling piston in a non-displaceable manner in and/or counter to the pulling direction, so that the distribution module is carried along during the movement of the pulling piston. The distribution module acts on the first and on the second working piston, so that when the pulling piston is displaced in the pulling direction, the working pistons in the cylinders are displaced in order to reduce the volume in the cylinders and generate the hydraulic pressures.

In a preferred embodiment of the invention, the guide channel is aligned parallel to the cylinders. The brake force distribution device is designed to be particularly space-saving when the guide channel is positioned between the cylinders. This has the advantage that, in particular with a symmetrical positioning of the guide channel between the cylinders, the mechanical braking force can be transferred particularly evenly to the working pistons.

In a preferred development of the invention, the brake force distribution device has an adjustment device for adjusting the two hydraulic devices. In operation, it is known that brake receiving devices do not have an identical braking force due to different abrasion of brake pads, manufacturing differences, etc., although they can be constructed in the same way. The adjusting device makes it possible to adjust the distribution of the first and the second hydraulic pressure and in this way to bring the downstream brake receiving devices to brake evenly. It is particularly preferred that the adjusting device is designed to be able to adjust both hydraulic devices independently of one another and/or selectively, in particular absolutely.

In a first possible embodiment of the invention, the first hydraulic device has a first adjustment piston and a first actuator for adjusting the position of the first adjustment piston in the first cylinder. The second hydraulic device has a second adjustment piston and a second adjusting element for adjusting the position of the second adjustment piston in the second cylinder. The position of the respective adjustment piston in the respective cylinder can be changed by the actuator, so that a volume in the respective cylinder can be adjusted. After the brake arrangement is designed as a closed hydraulic system, which in particular has no reservoirs and/or expansion tanks for brake fluid, a reduction or increase in the volume in the respective cylinder results in the hydraulic pressure in the hydraulic device being increased or reduced. In other words, the respective hydraulic subsystem is hydraulically preloaded by the adjustment device. Because each hydraulic device has an adjustment option, both the synchronization of the two brake receiving devices with one another and the absolute hydraulic pressure and thus in particular the absolute position, for example, of a brake pad relative to a brake disc, can be conveniently adjusted. In a very simple embodiment of the invention, the adjusting elements are each designed as an adjusting screw, via which the position of the adjusting piston can be changed. Preferably, each of the hydraulic devices has an adjustment spring, so that the respective adjustment piston reduces the volume against the spring preload of the adjustment spring, so that when the volume increases, the adjustment spring pushes out the adjustment piston and the volume can be changed in both directions.

In an alternative embodiment of the invention, the adjustment device is arranged on the distribution module and selectively changes a distance between the distribution module and the working piston for each hydraulic device. Several options can be provided for such a change in distance: On the one hand, it is possible for a connecting link between the distribution module and the working piston to be changed in length. In a preferred embodiment of the invention, each hydraulic device has a push rod, the push rod preferably being mounted in a rotary joint in the working piston. On the side of the distribution module, the push rods are arranged in a stationary thread, so that by rotating the push rods, they can be extended or retracted in the direction of the working pistons in order to change the distance between the distribution module and the working pistons.

In one possible embodiment of the invention, the brake force distribution device has a locking device, with the locking device comprising a blocking element. The locking member is designed in particular as a catch. The blocking element is arranged in the tension piston in a prestressed manner perpendicular to the direction of tension. Furthermore, the brake force distribution device has a receiving opening for receiving a free end of the blocking element when the blocking element is in a blocking position. In the blocking position, the blocking element is thus coupled to the tension piston in a non-displaceable manner and fixed in the receiving opening, so that the tension piston is blocked. The brake force distribution device is thus in a braking state. Furthermore, the locking device has a release element, wherein the release element can be arranged in the receiving opening for a release position from an opposite side. By arranging the release member in the receiving opening from the opposite side, the blocking member is forced out or cannot enter the receiving opening. The blocking position is thus prevented or canceled by the blocking member, so that the brake force distribution device is in a release state.

Alternatively, the release member can be placed in a neutral position. For example, the release element is arranged so that it can be displaced perpendicularly to the pulling direction and is also positioned pivotably, so that the blocking element can be pivoted away from the receiving opening in a neutral position and can be pivoted toward the receiving opening in the release position and can be introduced into it. Both the blocking element and the release element are preferably prestressed for moving into the receiving opening, the prestressing from the releasing element being stronger than the prestressing from the blocking element, so that the blocking element is pushed out of the receiving opening by the releasing element.

Another object of the invention relates to a brake assembly with the brake force distribution device as described above or according to one of the preceding claims. The brake arrangement has a first and a second brake receiver device, the brake receiver devices preferably being designed as hydraulic brake receiver devices and converting the first and second hydraulic pressure into a first and a second braking force, which are transmitted to a brake, in particular a disc brake or rim brake. The first brake receiver device is hydraulically connected to the first hydraulic device, and the second brake receiver device is hydraulically connected to the second hydraulic device. As already mentioned, the brake arrangement is a closed hydraulic system. Optionally, in addition, the brake arrangement has an actuating device for introducing the mechanical braking force, for example the actuating device is designed as a hand lever device.

A further object of the invention relates to a vehicle with the brake arrangement as described or according to claim 9, wherein the brake-actuating devices are arranged on different wheels, in particular on a common axle of the vehicle.

• 1 eine schematische, dreidimensionale Darstellung einer Bremskraftverteilervorrichtung als ein erstes Ausführungsbeispiel der Erfindung;
• 2 eine schematische Schnittdarstellung der Bremskraftverteilervorrichtung in der 1;
• 3 eine schematische Schnittdarstellung der Seilzugeinrichtung 7 der Bremskraftverteilervorrichtung der vorhergehenden Figuren;
• 4 eine schematische, dreidimensionale Darstellung einer Bremskraftverteilervorrichtung als ein zweites Ausführungsbeispiel der Erfindung;
• 5 eine schematische Schnittdarstellung der Bremskraftverteilervorrichtung in der 4;
• 6 eine schematische, dreidimensionale Darstellung einer Bremskraftverteilervorrichtung gemäß dem ersten Ausführungsbeispiel mit einer Feststelleinrichtung in einem Bremszustand;
• 7 eine schematische, dreidimensionale Darstellung der Bremskraftverteilervorrichtung in der 6 in einem Freigabezustand;
• 8 eine schematische Schnittdarstellung der Bremskraftverteilervorrichtung in dem Freigabezustand;
• 9 eine schematische Schnittdarstellung der Bremskraftverteilervorrichtung in dem Bremszustand.

Further features, advantages and effects of the invention result from the following description of preferred exemplary embodiments of the invention and the attached figures. These show:

• 1 a schematic, three-dimensional representation of a brake force distribution device as a first embodiment of the invention;
• 2 a schematic sectional view of the brake force distribution device in FIG 1 ;
• 3 a schematic sectional view of the cable device 7 of the brake force distribution device of the preceding figures;
• 4 a schematic, three-dimensional representation of a brake force distribution device as a second embodiment of the invention;
• 5 a schematic sectional view of the brake force distribution device in FIG 4 ;
• 6 a schematic, three-dimensional representation of a brake force distribution device according to the first embodiment with a locking device in a braking state;
• 7 a schematic, three-dimensional representation of the brake force distribution device in the 6 in a release state;
• 8th a schematic sectional view of the brake force distribution device in the release state;
• 9 a schematic sectional view of the brake force distribution device in the braking state.

The 1 shows in a schematic, three-dimensional representation a brake force distribution device 1 as an embodiment of the invention. The brake force distribution device 1 has a cable interface 2 for connection to a cable 3 . The cable interface 2 forms an input into the brake force distribution device 1. The brake force distribution device 1 also has a first hydraulic interface 4a and a second hydraulic interface 4b, which are used for coupling to a first brake receiver device 5a and a second brake receiver device 5b. The cable 3 is operatively connected to an actuating device 6, which has, for example, a brake lever on a handlebar of a vehicle. The brake force distribution device 1, the actuating device 6, the brake receiving devices 5 a, b form a brake arrangement 100 for a vehicle 101. The brake receiving devices 5 a, b are arranged on different wheels of a common axle of the vehicle 101 and generate a first and a second braking force by a first and a second hydraulic pressure from the first and the second hydraulic interface 4a, b.

The 2 shows a schematic cross-sectional view of the brake force distribution device 1 in FIG 1 , wherein the cable 2 in the cable interface 3 and the first and the second hydraulic interface 5 a, b are shown again. The cable 2 forms an input for transferring a mechanical braking force from the actuating device 6 to a cable device 7. The brake force distribution device 1 also has a first hydraulic device 8a and a second hydraulic device 8b, with the first hydraulic device 8a being designed to distribute the first hydraulic pressure for the first hydraulic interface 5a and the second hydraulic device 8b is designed to generate the second hydraulic pressure for the second hydraulic interface 5b.

The first hydraulic device 8a has a first cylinder 9a and a first working piston 10a, the second hydraulic device 8b has a second cylinder 9b and a second working piston 10b. The working pistons 10 a, b are arranged to move in the cylinders 9 a, b. The first cylinder 9a has a first working section 11a, the first cylinder 9a being displaceably arranged in the first working section 11a. The second cylinder 9b has a second working section 11b, the second working piston 10b being displaceably arranged in the second working section 11b. The cable pull device 7 has a pull piston 12 which is arranged to be displaceable in a guide channel 13 . In this exemplary embodiment, the brake force distribution device 1 has a base body 14 , with the guide channel 13 and the first and second cylinders 9a, b being introduced into the base body 14 . The cable pull device 7 also has a distribution module 15, with the distribution module 15 adjoining the tension piston 12 and being connected to it in a non-displaceable manner.

The first cylinder 9a, the second cylinder 9b and the guide channel 13 are arranged parallel to one another. The guide channel 13 is in particular arranged symmetrically and/or centrally between the first cylinder 9a and the second cylinder 9b. The pulling piston 12 is arranged to be displaceable in a pulling direction due to the mechanical braking force introduced via the cable pull device 7, wherein when the pulling piston 12 is displaced with the distribution module 15, the working pistons 10a, b are carried along in the pulling direction, so that the volume in the first and the second cylinder 9a, b is reduced and the first and the second hydraulic pressure are built up in the hydraulic interfaces 4a, b. In the embodiment in the 2 the distribution module 15 acts without intermediate members and/or directly on the working pistons 10a, b.

The brake force distribution device 1 has an adjustment device 16, the adjustment device 16 being designed to adjust the two hydraulic devices 8a, b. The first hydraulic device 8a has a first adjustment piston 17a and a first actuator 18a for adjusting the position of the first adjustment piston 17a in the first cylinder 9a. The second hydraulic device 8 b has a second adjustment piston 17 b and a second actuator 18 b for adjusting the second adjustment piston 17 b in the second cylinder 9 b. The first and second adjusting pistons 17a, b are each adjustable in the direction of pull in the respective cylinder 9a, b. More precisely, the adjustment pistons 10a, b are each arranged in an adjustment section 19a, b, the adjustment sections 19a, b having a smaller cross-sectional area than the working sections 11a, b. A first return spring 20a is arranged between the first working piston 10a and the first adjusting piston 17a, and a second return spring 20b is arranged between the second working piston 10b and the second adjusting piston 10b. The restoring springs 20a, b are each oriented in such a way that they push out or prestress the respective working piston 10a, b and/or the respective adjusting piston 17a, b from the respective cylinder 9a, b.

Incidentally, each of the pistons 10a, b, 17a, b is provided with sealing means so that the respective cylinder 9a, b is fluid-tight. The actuators 18 a, b are each designed as screws which allow the respective adjustment piston 17 a, b to be moved in the respective cylinder 9 a, b by screwing in the respective screw in order to increase the volume in the cylinder 9 a, b shrink. This mode of operation of the adjustment device 16 is based on the consideration that the brake assembly 100 is designed as a closed hydraulic system, so that the first and second hydraulic pressures can be hydraulically prestressed independently of one another by the adjustment device 16 . The hydraulic systems of the first hydraulic device 8a and the second hydraulic device 8b are hydraulically separated from one another.

The 3 shows a cross section through the cable pull device 7, it being seen that the pull piston 12 is secured against rotation by a feather key 21 in the guide channel 13. The guide channel 13 has a corresponding guide groove.

In the 4 a second exemplary embodiment of the brake force distribution device 1 is shown, with the adjusting device 16 being designed differently in this exemplary embodiment and being integrated in the distribution module 15 .

As can be seen in particular from the 5 results, which is a cross section through the brake force distribution device 1 in the 4 shows, the adjustment device 16 is formed in the area of the distribution module 15 . The mechanical braking force is transmitted to the working pistons 10a, b via a first and a second push rod 22a, b, which are rotatably mounted via a swivel joint in the respective working piston 10a, b. In the distribution module 15 there is a first threaded pin 23a and a second threaded pin 23b, which extend perpendicularly to the pulling direction and/or to the longitudinal extent of the first and second push rods 22a, b. The threaded pins 23a, b are arranged in sockets 24a, b in order to reduce friction. By rotating the push rod 22 a, b, which has a thread on the outside, it can be adjusted in the longitudinal position relative to the threaded pins 23 a, b and in this way the distance between the distribution module 15 and the working pistons 10 a, b set. Thus, the two hydraulic devices 8a, b can be adjusted. The return springs 20 a, b are supported on an opposite wall of the respective cylinder 9 a, b. Thus, a solution is introduced in the form of a semi-hydraulic brake force distributor, which is actuated by a cable 2 and supplies two separate brake actuators with fluid. Thanks to the cable, the installation space of the brake transmitter and thus its aesthetics can be optimized. A conventional mechanical brake transmitter can also be used with this solution. This means that there is no need to develop a new encoder for the given application. The brake force distribution device 1 can be integrated between the brake transmitter and the brake receivers, which significantly increases the possibility of optimizing the installation space.

The cable 2, actuated by the mechanical brake transmitter, pulls on the pulling piston 12 as the primary piston, which actuates the two pistons UZSB as hydraulic devices 10a, b. The hydraulic lines are used to transmit the hydraulic pressure to the brake callipers. The lines have connectors that are screwed to the brake force distribution device 1, with other connections being conceivable. An adjustment screw with its locking nut, which is slotted to allow the cable 3 to be fitted, has been provided for tensioning the cable. The locking nut should be loosened so that the adjusting screw can be adjusted or turned as desired. To secure the setting, the lock nut should be tightened again. Two return springs 20a, b were provided to reset the pistons UZSB. The two separate brake systems are closed, ie wear adjustment and tolerance compensation are carried out by reducing the hydraulic volume (in the case of an open system tem is used for fluid equalization of the fluid tank). This is made possible by the two adjustment screws as actuators 18a, b. As soon as they are turned further, they press on the two adjusting pistons 17a, b, which makes the hydraulic space smaller. As a result, the pistons of the brake callipers will move further: this is how the adjustment takes place.

In the other figures, the brake force distribution device 1 is shown in a second embodiment, in which the adjustment for the brake taker takes place in a different way. Since two push rods 22 a, b were provided which press on the working piston 10 a, b. The pulling piston 12 pulls on the sheet metal of the distribution module 15, which in turn also moves the push rods 22a, b thanks to swivel joints. For adjustment, the push rods 14 can be further screwed using the threaded pins 23a, b. For this purpose, bushings 24a, b were provided in order to reduce friction and compensate for installation and component tolerances. Since the adjustment for the brake callipers is carried out by the push rods 22a, b, the adjustment pistons 17a, b are no longer needed and have therefore been removed. In addition, the principle remains unchanged.

The 6 shows a schematic three-dimensional view of the brake force distribution device 1, which - as shown - can be designed according to the first embodiment or alternatively according to the second embodiment. The brake force distribution device 1 in the 6 has a locking device 25, wherein the locking device 25 is designed to lock the pulling piston 12 in a braking state.

In the 6 the locking device 25 is shown with the brake force distribution device 1 in a braking state. The locking device 25 has a pivoting lever 31, the pivoting lever 31 being arranged pivotably about a pivot axis which is aligned perpendicularly to the pulling direction.

A receiving opening 28 should be pointed out, with the receiving opening 28 opening into the guide channel 13 .

In the 7 the locking device 25 is shown with the brake force distribution device 1 in a release state. The pivoting lever 31 has been pivoted by about 45°. A further receiving opening 30 should be pointed out, the function of which will be explained below. A hand knob 32 is arranged on the pivot lever 31, the hand knob 32 being able to be displaced on an axis parallel to the pivot axis. The pivoting lever 31 can be moved with the hand knob 32 in order to convert the locking device 25 with the brake force distribution device 1 from the release state to the braking state and in the opposite direction.

The 8th shows the locking device 25 in a cross-sectional view along the pulling piston 12 in the release state according to FIG 7 . The locking device 25 has a blocking element 26 , the blocking element 26 in the pulling piston 12 being elastically prestressed radially outward perpendicularly to the pulling direction, so that it presses against an inner wall of the guide channel 13 . Furthermore, the locking device 25 has a release element 27 and the receiving opening 28 . The release member 27 is connected to the hand knob 32 so that it can be displaced along its own longitudinal axis. When the release element 27 is in the released position, it is arranged in the receiving opening 28 so that the blocking element 26 is prevented from moving into the receiving opening 28 . The brake force distribution device 1 is in the release state so that it can work normally, ie the hydraulic braking force depends on the mechanical braking force introduced.

In the 9 is the locking device 25 with the brake force distribution device 1 in the braking state according to 7 shown. The pivoted lever 31 with the hand knob 32 and the release member 27 are pivoted away so that the receiving opening 28 is released. The release member 27 is in a release position. The blocking element 26 is moved into the receiving opening 28 and is in a blocking position, so that the pulling piston 12 is coupled to the housing base body 14 in a non-displaceable manner.

Both the blocking element 26 and the release element 21 are elastically prestressed, with the pretension of the release element 21 being stronger than the pretension of the blocking element 26, so that even when the blocking element 26 is retracted, the release element 27 can release the blocking position from the blocking element 26 , by being pressed out of the receiving opening 28 .

To operate the release member 27, the locking device 25 has the pivoted lever 31, the pivoted lever 31 being able to be pivoted between a neutral state and a locked state. In the neutral state, the release member 27 is “parked” in the additional receiving opening 30 so that it cannot accidentally move into the receiving opening 28 . In the locked state, the pivoted lever is pivoted so that the release member 27 enters the receiving opening 28 .

A system is thus proposed which keeps the two working pistons 10a, b of the brake force distribution device 1 in an actuated position, so that a braking torque and thus a locking function arise as long as the mechanism is activated.

In the 6 the brake force distribution device 1 is shown with the locking device 25 in the deactivated state. That is, the locking device 25 is open and remains open. The hand knob 32 and its release element 27 designed as a pin are held in the open position thanks to the additional receiving opening 30 designed as a bore. In order to activate the locking device 25, the knob 32 designed as a knob must be pulled so that the release member 27 is released from the bore. So that the pivoting lever 29 can be turned up to a blind hole. Parking brake 2 is activated as soon as the pin engages in the blind hole. From now on, you only have to pull the brake lever of the brake transmitter/actuator 6 once. The pivoting lever 29 rotates about a fastening screw, which in turn secures the entire locking device 25 to the brake force distribution device 1. An additional thread was provided on the base body 14 for this purpose.

In the 8th a section of the locking device 25 is shown in the deactivated state. The receiving opening 28 is blocked by the release element 27 . An additional hole was drilled into the pull piston 12, in which the blocking element 26, designed as a pin, is installed with its spring. In this state, the blocking element 26 will move over the receiving opening 28 during the actuation of the service brake and the release element will not engage in this receiving opening 28 . For this, only the compression spring of the release member 27 should generate a greater force than that of the spring of the blocking member 26, so that the release member 27 remains in its position. Here the blocking element 26 moves along the groove of the feather key 21, although it was done here only for reasons of space. The feather key 21 and its groove could be turned: this would not affect the principle of the locking device 25 presented.

In the 7 the locking device 25 is now shown in its activated position: the receiving opening 28 is no longer blocked with the release element 27 . For this purpose, the brake lever was actuated once and the blocking member 26 was able to penetrate into the receiving opening 28 when the pulling piston 12 of the brake force distribution device 1 passed while the brake lever was actuated. This will be again in the 9 shown. A collar was provided on the blocking element 26 so that the blocking element 26 does not jump out through the bore.

Thanks to the blind hole as a further receiving opening 30, the release member 27 is held in this position. The locking device 25 is activated and so that the pivoting lever 29 does not remain free, this blind hole was provided, whereby there would be no effect on the locking function of the locking device 25 if the pivoting lever 29 were to remain free. Other options are conceivable for enabling the pivoting lever 29 to be locked in position. Leaving the pivoted lever 29 free is also conceivable, in which case it would then “hang” freely, which may not be permitted depending on the requirement. A collar has been provided on the fastening screw so that it can be preloaded on the housing of the brake force distribution device 1 without preventing the pivoting lever 29 from rotating at the same time.

The locking function of the locking device 25 may be performed according to the eKFV regulation via the hydraulics. A purely mechanical parking brake should be provided for larger vehicle classes with 3 or more wheels.

Reference List

1

brake force distribution device

2

cable interface

3

cable pull

4a

first hydraulic interface

4b

second hydraulic interface

5a

first brake device

5b

second brake device

6

operating device

7

cable device

8a

first hydraulic device

8b

second hydraulic device

9a

first cylinder

9b

second cylinder

10a

first working piston

10b

second working piston

11 a

first stage of work

11b

second stage of work

12

pulling piston

13

guide channel

14

body

15

distribution module

16

adjustment device

17a

first adjustment piston

17b

second adjustment piston

18a

first actuator

18b

second actuator

19a

first adjustment section

19b

second adjustment section

20a

first return spring

20b

second return spring

21

Adjusting spring

22a

first push rod

22b

second push rod

23a

first threaded pin

23b

second grub screw

24a

first jack

24b

second jack

25

locking device

26

locking device

27

release body

28

intake opening

29

swing lever

30

further intake opening

31

empty

32

hand knob

100

brake assembly

101

vehicle

Claims (10)

Brake force distribution device (1) with a cable device (7) for transferring a mechanical braking force into the brake force distribution device (1) via a cable (3), with a first hydraulic device (8a) for generating a first hydraulic pressure, the first hydraulic device (8a) via the cable pull device (7) can be actuated in order to at least partially convert the mechanical braking force into the first hydraulic pressure, characterized by a second hydraulic device (8b) for generating a second hydraulic pressure, the second hydraulic device (8b) being actuatable via the cable pull device (7). is to at least partially convert the mechanical braking force into the second hydraulic pressure. Brake force distribution device (1). claim 1 , characterized in that the first hydraulic device (8a) has a first cylinder (9a) and a first working piston (10a) and that the second hydraulic device (8b) has a second cylinder (9b) and a second working piston (10b), wherein the first and the second cylinder (9 a, b) are arranged in parallel and/or in the same direction. Brake force distribution device (1) according to one of the preceding claims, characterized in that the cable device (7) has a tension piston (12) and a guide channel (13), the tension piston (12) in the guide channel (13) being pulled in one direction by the mechanical braking force is displaceably arranged and has a distribution module (15), the distribution module (15) being connected to the traction piston (12) and transmitting the braking force from the traction piston (12) to the working pistons (10 a, b). Brake force distribution device (1). claim 3 , characterized in that the guide channel (13) is aligned parallel to and/or between the cylinders (9 a, b). Brake force distribution device (1). claim 3 or 4 , characterized in that it has an adjustment device (16) for adjusting the two hydraulic devices (8 a, b). Brake force distribution device (1). claim 5 , characterized in that the first hydraulic device (8a) has a first adjusting piston (17a) and a first adjusting element (18a) for adjusting the position of the first adjusting piston (17a) in the first cylinder (9a) and the second hydraulic device (8b) has a second adjustment piston (17b) and a second actuator (18b) for adjusting the position of the second adjustment piston (17b) in the second cylinder (9b), the position of the adjustment piston (17a, b) resulting in a volume in the respective cylinder (9th a, b) is adjustable. Brake force distribution device (1). claim 5 , characterized in that the adjusting device (16) is arranged on the distribution module (15) and selectively for each hydraulic device (8 a, b) changes a distance between the distribution module (15) and the working piston (a0 a, b). Brake force distribution device (1) according to one of the preceding claims, characterized by a locking device (25), wherein the locking device (25) has a blocking element (26), wherein the blocking element (26) is arranged in the tension piston (12) in a prestressed manner perpendicular to the direction of tension , and a receiving opening (28) for receiving the blocking member (26) in a blocking position, with the brake force distributor in the blocking position device (1) is blocked in a braking state, and a release element (27), wherein the release element (27) can be arranged in the receiving opening (28) for a release position from an opposite side, so that the blocking element (27) does not get into the receiving opening ( 28) can occur and the locked position is prevented. Brake arrangement (100) with the brake force distribution device (1) according to one of the preceding claims and a first and a second brake device (5 a, b), wherein the first brake device (5a) with the first cylinder (9a) and the second brake device (5b) are hydraulically connected to the second cylinder (9b) for transmission of the hydraulic braking force. Vehicle (101) with the brake assembly (100). claim 9 , characterized in that the brake receiving devices (5 a, b) are arranged on different wheels.

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