DE102021126116A1 - Set consisting of a master fitting and a connection device for connecting the master fitting to a hydraulic line for a hydraulic system of a vehicle, vehicle with the set and method for connecting a hydraulic line to a master fitting using a connecting device - Google Patents

Abstract

A set 1 consisting of a factory-prefilled master fitting 4 and a connection device 5 is proposed, wherein the master fitting 4 can be connected to a hydraulic line 6 for a braking device of a vehicle in a simple and functional manner by means of the connecting device 5 . The master fitting 4 has a hydraulic master cylinder 7 which defines a main axis 2 which runs in a lifting direction 3 . The master cylinder 7 includes a pressure chamber 9 pre-filled with fluid, which has a connection opening 13 for forming a flow connection with the hydraulic line 6 . The master cylinder 7 has a closure device 16, which can be transferred from a closed position 35 to a release position 36, the connection opening 13 being closed in the closed position 35 and the connection opening 13 being open in the release position 36 for the fluidic connection of the hydraulic line 6. The locking device 16 can be transferred from the locking position 35 to the release position 36 by a movement in a direction opposite to the lifting direction 3 .

Description

The invention relates to a set consisting of a master fitting and a connection device for connecting the master fitting to a hydraulic line for a hydraulic system of a vehicle with the features of the preamble of claim 1 and a vehicle with the set. The invention further relates to a method for fluidic connection of a hydraulic line to a master fitting by means of a connection device.

The prior art already discloses hydraulic components of a hydraulic brake for steering-guided vehicles that are prefilled and arranged separately from a hydraulic connection. Devices for coupling the pre-filled hydraulic components to the hydraulic connection are also known.

For example, the reference describes EP 3 434 543 B1 a hydraulic line connection for a hydraulic brake of vehicles with a control arm, with a line fastening device. The line fastening device comprises a fastening section for fastening the line fastening device in a receiving section of a hydraulic component of the brake and a connecting section for connection to a hydraulic line, with an extension being arranged on the fastening section, which can serve as a seal after the hydraulic component has been filled and can be removed for assembly .

It is the object of the present invention to provide a connection device and a master fitting with a prefilled slave cylinder, the master fitting being connected to a hydraulic line for a hydraulic System of the vehicle can be connected.

This object is achieved by a set consisting of a master fitting and a connection device for connecting the master fitting to a hydraulic line for a hydraulic system of a vehicle with the features of claim 1, by a vehicle with the set according to claim 9 and by a method for fluidically connecting a Hydraulic line to a master fitting by means of a connection device with the features of claim 10 solved. Preferred and/or advantageous embodiments of the invention result from the dependent claims, the following description and/or the accompanying figures.

A set consisting of a master fitting, preferably pre-filled at the factory, and a connection device for connecting the master fitting to a hydraulic line for a hydraulic system of a vehicle, for example, is proposed. The hydraulic system can be a clutch or a braking device, for example. The master fitting can preferably be connected to a slave cylinder of the hydraulic system by means of the hydraulic line. The master fitting is preferably designed for manual actuation of the slave cylinder when it is connected to the slave cylinder via the hydraulic line. The transmitter armature can be arranged, for example, on a steering device of the vehicle, in particular on a handlebar, steering lever or steering wheel. Preferably, the master armature comprises a housing made of a plastic material or of metal, for example an aluminum alloy. For example, the housing has a fastening interface for fastening the master fitting to the steering device. The attachment interface is designed, for example, as an attachment tab.

In the event that the hydraulic system is the braking device of the vehicle, this includes a braking device, e.g. a shoe or disc brake, which can brake at least one wheel of the vehicle by means of friction. A braking force is generated in particular by the slave cylinder. The master fitting is preferably designed to generate hydraulic pressure and introduce it into the slave cylinder when it is connected to the hydraulic line.

The master fitting can be transferred from a pre-assembled state to a connected state. In the pre-assembly state, the master fitting and the connection device are not connected. In the connection state, the master fitting and the connection device are connected to one another. In the connected state, the hydraulic line can preferably be connected to the master fitting via the connecting device connected to the master fitting.

The master fitting includes a hydraulic master cylinder, in particular for generating the hydraulic pressure and for transferring the hydraulic pressure to the slave cylinder. The master cylinder has a pressure chamber which is optionally formed in and/or integrated into the housing of the master fitting. The pressure chamber is preferably of cylindrical design. It defines a main axis that extends in a stroke direction.

The pressure chamber is pre-filled with a fluid, for example a hydraulic fluid, in particular at the factory. It has a connection opening which goes into is arranged in particular at a first end of the pressure chamber directed in the lifting direction. In the pre-assembly state, the connection opening is closed, so that the fluid cannot escape, for example during transport, storage, provision and/or assembly of the master fitting on the vehicle.

It is advantageous that the master fitting no longer has to be filled with the fluid during and/or during assembly on the vehicle and then vented. Rather, the factory pre-filled master fitting can be delivered and installed as it is. In particular, it is immediately ready for use to connect the master cylinder to the hydraulic line by means of the connection device. The factory-prefilled master fitting can also have advantages when servicing, repairing or replacing the master fitting. The pre-filled master cylinder of the master fitting, which can be connected to the hydraulic line by means of the connection device, no longer has to be filled and bled during installation on the vehicle, which can save time during repairs and/or reduce the service time, e.g. when renting the vehicles . Environmental pollution caused by spilled fluid when filling the master cylinder can be avoided. A further advantage is that the number of tools required for changing the master fitting can be reduced; in particular, the utensils usually required for filling the master cylinder can be dispensed with. Furthermore, the factory pre-filled master fitting ensures that the fluid specified by the manufacturer of the master fitting is used and thus the full functionality of the master cylinder can be guaranteed in this regard.

The master cylinder already mounted on the vehicle can preferably be fluidically connected to the hydraulic line and via this to the slave cylinder by means of the connecting device when the master fitting is in the connected state. In particular, in the connection state, the fluid can flow through the connection opening into the hydraulic line and through this into the slave cylinder.

The master cylinder preferably has a piston which is arranged in the pressure chamber and can be moved in the stroke direction when pressure is applied, in particular in order to displace the fluid from the pressure chamber and introduce it into the hydraulic line connected via the connection device.

To generate the pressurization, the master fitting preferably includes a hand lever, which can be transferred from a rest position to a working position. For example, the hand lever is arranged on the housing or in a pivotable manner relative thereto. In particular, the hand lever can be pivoted from the rest position into the working position. The hand lever is preferably operatively connected to the piston. For example, the master fitting includes a transmission device for converting the pivoting movement of the hand lever into a translatory movement and for transferring the translatory movement to the piston. For example, the transmission device is designed as a push rod. The master cylinder is preferably actuated during and/or during the pivoting movement of the hand lever, the piston being pressurized and being moved in the lifting direction.

The master cylinder has a closure device which is designed and arranged, in particular in the pre-assembly state, to close the connection opening of the pressure chamber. For example, the closure device has a, for example, cylindrical plug and a, for example, disc-shaped guide section. The plug is preferably arranged, for example, centrally on the guide section and protrudes from it at an angle, in particular at right angles.

The closure device can be transferred from a closed position to a release position. In the closed position, the connection opening is closed in a flow-tight manner. The master fitting preferably assumes the pre-assembly state in the closed position. In the release position of the closure device, the connection opening for the fluidic connection of the hydraulic line by means of the connection device is open. In the release position, the master fitting preferably assumes the connection state.

According to the invention, the closure device can be transferred from the closed position to the release position by a movement in a direction opposite to the lifting direction. In particular, the closure device can be moved a little along the pressure chamber towards the piston, e.g. be shifted, in order to release the connection opening.

In a preferred embodiment of the invention, the master cylinder includes a guide pot, which is designed and/or arranged to guide the closure device during movement in the opposite direction within the pressure chamber. For example, the guide pot is cylindrical or essentially cylindrical. The guide pot is preferably inside the pressure chamber, in particular at the first end pointing in the lifting direction of the pressure chamber, arranged stationary. Optionally, the guide pot has a length extending along the main axis, which corresponds to a fraction, for example a third, quarter or fifth of the total length of the pressure chamber. In particular, the outer circumference of the guide cup rests, at least in sections, on an inner circumference of the pressure chamber.

In a further preferred embodiment of the invention, the guide pot has a recess. For example, the recess is arranged in the stroke direction so that it overlaps or is congruent with the connection opening of the pressure chamber and/or is incorporated in the guide pot. The guide section of the closure device is preferably accommodated in the closed position within the guide cup, it being preferably arranged on an end of the guide cup pointing in the lifting direction. In the closed position, the plug of the closure device preferably protrudes through the recess and through the connection opening in the stroke direction and closes the recess and optionally additionally the connection opening of the pressure chamber.

In one possible embodiment of the invention, the guide section is/is guided during and/or during the movement in the opposite direction for transferring the closure device from the closed position into the release position along the guide pot. For this purpose, the outer circumference of the guide section is preferably in sliding contact with an inner circumference of the guide cup.

In a possible constructional embodiment of the invention, the master cylinder has a spring device designed, for example, as a spiral spring. The closure device is preferably held in the closed position by the spring device under spring force. For example, the spring device is arranged in the pressure chamber, being supported in the stroke direction on the closure device, in particular on the guide section. It is advantageous that the closing device cannot unintentionally release from the closed position due to the spring force being applied, e.g. due to vibrations of the master fitting during transport, provision and/or assembly on the vehicle, and is securely sealed in a flow-tight manner by means of the sealing device.

In the opposite direction, the spring device can be supported, for example, on the housing or on the piston. In the latter case, the piston can be moved in the lifting direction against a spring force of the spring device when pressure is applied, and can be reset by the spring device in the opposite direction when the pressure application decreases or has ended. In this case, the spring device advantageously also forms a restoring device for restoring the piston.

A further possible design configuration of the invention provides that the master cylinder includes a sealing device for fluidic sealing of the recess in the guide pot. In the closed position, the sealing device preferably sits on the stopper protruding through the recess and fluidically seals the recess. The sealing device can be arranged on the stopper outside the pressure chamber or inside the pressure chamber. As a result, the fluid can be prevented from escaping through the recess in the closed position.

A preferred structural realization of the invention provides that the guide section of the closure device has at least one passage opening. For example, two, four or more passage openings are made in the guide section as bores directed along the main axis. The fluid can preferably flow through the at least one passage opening, in particular in the release position of the closure device, in particular in the lifting direction. In particular, the fluid can thus flow into an intermediate space formed in the release position between the end of the guide cup pointing in the opposite direction and the guide section.

The connection device is designed, for example, as a plug that is elongated along a longitudinal axis, in particular for plugging into a suitable socket that is integrated in the master fitting. In particular, the connection device forms what is known as a “female part”, with the master fitting including a matching so-called “male part”.

With the longitudinal axis, the plug can be arranged and/or is arranged coaxially to the main axis, it being insertable and/or inserted into the master fitting in the opposite direction. The connection device has an integrated flow channel which is open on both sides, in particular when the longitudinal axis is arranged coaxially to the main axis in the lifting direction and in the opposite direction.

The connection device has a coupling section which is designed for coupling to the hydraulic line. The coupling section can preferably be arranged on the hydraulic line for the purpose of coupling, for example plugged or plugged onto it. The hydraulic line and the one in the connection device are in a coupled state with the hydraulic line integrated flow channel preferably fluidly connected to each other.

For plugging into the master fitting, the connection device comprises an insertion section which can be inserted into the master fitting in the opposite direction, in particular when the longitudinal axis of the connecting device is arranged coaxially with respect to the main axis. In particular, the connection device can be moved with the insertion section along the main axis towards the pressure space and finally moved a little way into the pressure space, in particular into the guide pot, through the connection opening, sealing device and/or through the recess in the guide pot.

In a possible constructive realization of the invention, the plug-in section has an end piece. The end piece preferably forms a free end of the plug-in section. The connection device is preferably arranged in a connection position when the plug-in section is completely plugged into the master fitting. In this context, complete means that the insertion section is inserted so far into the master fitting that at least the end piece is arranged in the pressure chamber, in particular in the guide pot. It is particularly preferred within the scope of the invention that the master fitting is in the connection state when the connection device is arranged in the connection position.

Within the scope of the invention, it is preferred that the end piece presses against the closure device, in particular against the stopper, during and/or after the insertion section has been moved in. As a result, the closure device is preferably displaced in the opposite direction within the guide cup and transferred from the closed position to the release position. The gap between the end of the guide pot pointing in the opposite direction and the guide section is/is formed by the displacement of the closure device. In particular, the end piece is pushed into the intermediate space and/or arranged in the intermediate space in the release position of the closure device and/or in the connection position of the connection device.

The connection device is preferably fastened in the connection position in a form-fitting and/or force-fitting manner in the master fitting and is secured against unintentional loosening by a movement in the opposite direction. For this purpose, the master fitting can, for example, have an elastic device, in particular a wire form spring, by means of which the plug-in section is held elastically within the socket of the master fitting.

In a preferred structural implementation of the invention, a flow connection is formed between the pressure chamber and the connection device when the connection device is arranged in the connection position. To form the flow connection, the end piece preferably has at least one inlet opening, which is fluidically connected to the flow channel. In particular, the passage opening in the guide section and the inlet opening in the end piece form a flow connection between the pressure chamber and the flow channel in the connection position. In particular, the fluid is displaced when and/or during the pressurization of the piston and flows through the passage opening into the intermediate space, from where it flows through the inlet opening into the flow channel. If the hydraulic line is coupled to the coupling section of the connection device, the fluid can flow from the flow channel into the hydraulic line.

An easy-to-use quick coupling is thus provided by means of the connection device, which can connect the prefilled master fitting to the hydraulic line safely and functionally.

Optionally, a master fitting for use in the set according to the previous description and/or according to one of claims 1 to 8 forms a further subject matter of the invention. Optionally, a connection device for use in the set according to the previous description and/or according to one of claims 1 to 8 forms a further subject matter of the invention.

A further object of the invention is a vehicle with the set according to the previous description and/or one of claims 1 to 8. For example, the vehicle is designed as a single-track or multi-track vehicle. The vehicle is optionally designed as a low-floor vehicle. The vehicle is preferably designed as an electrically driven vehicle. In particular, the vehicle is designed as a small or very small electric vehicle or as an electric vehicle. The vehicles are to be understood in particular as vehicles without a seat or self-balancing vehicles with or without a seat.

For example, the vehicle can be designed as an electric unicycle, for example as a so-called monowheel or solowheel. With two or more wheels, the vehicle is preferably designed as a bicycle, in particular as an electric bicycle, for example as a pedelec or as an e-bike. Alternatively, the vehicle can be designed as a multi-track bicycle, in particular with three or more wheels. For example, the vehicle a transport or cargo bike, in particular a motorized or electrically driven transport or cargo bike, in particular a three-wheel or four-wheel pedelec or a rickshaw, in particular with or without a roof, or a cabin scooter. Alternatively, the vehicle can be designed as a scooter, in particular as an electric motorcycle, as an electric scooter, as an electric scooter, electric scooter, electric scooter, eg e-scooter. It is also possible within the scope of the invention for the vehicle to be in the form of a Segway, hoverboard, kickboard or the like.

A method for the fluidic connection of a hydraulic line to a preferably factory-prefilled master fitting by means of a connection device forms a further subject matter of the invention. The master fitting and the connection device are components of the set according to the previous description and/or according to one of claims 1 to 8. Alternatively or optionally in addition, the master fitting and/or the connection device is designed according to the previous description.

• Der Kopplungsabschnitt der Anbindungseinrichtung wird mit der Hydraulikleitung gekoppelt. Beispielsweise wird die Anbindungseinrichtung mit dem Kopplungsabschnitt voraus in die Hydraulikleitung eingesteckt oder der Kopplungsabschnitt wird auf die Hydraulikleitung aufgesteckt. Bevorzugt wird eine form- und/oder reibschlüssige Verbindung zwischen der Hydraulikleitung und der Anbindungseinrichtung gebildet, welche zusätzlich kraftschlüssig gesichert werden kann.

The procedure is characterized by the following steps:

• The coupling section of the connection device is coupled to the hydraulic line. For example, the connection device is inserted into the hydraulic line with the coupling section first, or the coupling section is pushed onto the hydraulic line. A positive and/or frictional connection is preferably formed between the hydraulic line and the connection device, which can also be secured in a non-positive manner.

The plug-in section of the connection device is preferably inserted in the opposite direction into the master fitting, in particular into a suitable receptacle in the master fitting.

While the insertion section is being inserted, the end piece is moved into the pressure chamber, in particular into the guide pot. The end piece is preferably moved beforehand through the connection opening, through the sealing device and/or through the recess. The end piece preferably presses against the closure device, in particular against the stopper, while it is being moved into the pressure chamber.

While the end piece is being moved into the pressure chamber, the closure device is transferred from the closed position to the release position. In particular, the master fitting is thereby transferred from the pre-assembly state to the connection state.

• 1 ein Längsschnitt entlang einer Hauptachse durch ein Set aus einer werkseitig vorbefüllten Geberarmatur und einer Anbindungseinrichtung zur Anbindung einer Hydraulikleitung für eine Bremsvorrichtung eines Fahrzeugs an die Geberarmatur;
• 2a-2b Verfahrensschritte zur Anbindung der Hydraulikleitung an die Geberarmatur.

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

• 1 a longitudinal section along a main axis through a set of a factory-prefilled master fitting and a connection device for connecting a hydraulic line for a braking device of a vehicle to the master fitting;
• 2a-2b Process steps for connecting the hydraulic line to the master fitting.

Identical or corresponding parts are provided with the same reference symbols in the figures.

The 1 shows a sectional view of a set 1 along a main axis 2 which runs in a lifting direction 3 . The set 1 comprises a master fitting 4, a connection device 5 and a hydraulic line 6. The master fitting 4 is pre-filled with a fluid at the factory. It is designed to manually operate a hydraulic system of a vehicle, in particular a braking device. For this purpose, the master fitting 4 can be attached to a steering device of the vehicle. The master fitting 4 has a pre-assembly state 15 . In the pre-assembly state 15, the master fitting 4 can be transported, stored, made available for assembly on the vehicle and/or assembled on the vehicle. In the pre-assembly state 15, the master fitting 4 and the connection device 5 are not connected to one another.

The vehicle is, for example, a small or very small vehicle, a bicycle or scooter powered by muscle power and/or electrically, in particular a pedelec, e-bike, electric scooter or e-scooter. The braking device of the vehicle includes a braking device which is designed, for example, as a friction brake. The braking device has a slave cylinder for transmitting a braking force to the braking device. A hydraulic master cylinder 7 of the master fitting 4 can be connected to the slave cylinder via the hydraulic line 6 in order to actuate it.

The master fitting 4 has a housing 8 made of an aluminum alloy and a hand lever 29 which is pivotally connected to the housing 8 and of a in the 1 shown rest position can be converted into a working position. The braking device can be activated by pivoting the hand lever 29 into the working position.

The hydraulic master cylinder 7 of the master fitting 4 is integrated in the housing 8 coaxially to the main axis 2 . Hydraulic master cylinder 7 includes a pressure chamber 9 filled with a fluid, for example a hydraulic fluid, which is formed in housing 8 .

The master cylinder 7 also has a piston 10 . The piston 10 is arranged in the pressure chamber 9 and can be moved in the stroke direction 3 coaxially to the main axis 2 . For this purpose, the piston 10 is in an operative connection with the hand lever 29 . A rod-shaped transmission device 11, in particular a push rod, is fastened to the hand lever, via which the piston 10 can be actuated when the hand lever 29 is pivoted into the working position. The transmission device 11 is detachably coupled to the piston 10 . When actuated, the piston 10 carries out a forward stroke in the stroke direction 3 . When the hand lever 29 is pivoted back into the rest position, the piston 10 is returned in a direction opposite to the lifting direction 3 by means of a spring device 12 which is arranged in the pressure chamber 9 and is designed as a spiral spring. The spring device 12 thus acts as a restoring device for the piston 10.

At one end pointing in the lifting direction 3 , the pressure chamber 9 has a connection opening 13 to which the hydraulic line 6 can be fluidically connected by means of the connection device 5 .

The master cylinder 7 comprises an essentially cylindrical guide pot 14 which is accommodated in the pressure chamber 9 and is arranged in a stationary manner at the end of the pressure chamber 9 pointing in the lifting direction 3 . The outer circumference of the guide pot 14 bears against an inner circumference of the pressure chamber, at least in sections. The guide pot 14 has a recess 19 which is introduced at an end of the guide pot 14 which is directed in the lifting direction 3 and is arranged congruently with the connection opening 13 in the lifting direction 3 .

The master cylinder 7 has a closure device 16 which is arranged in a closure position 35 in which it closes the recess 19 and thus the connection opening 13 . The closure device 16 comprises a cylindrical plug 17 and a disk-shaped guide section 18. The guide section 18 has at least one, preferably several, passage openings 31, which are introduced as bores. The plug 17 is placed centrally on the guide section 18 and protrudes from it in the lifting direction 3 . The guide section 18 is arranged in the pressure chamber 9, in particular inside the guide pot 14, with the plug 17 protruding through the recess 19 in the lifting direction 3 and closing it.

The master cylinder 7 includes a sealing device 20 which seals the recess 19 against the pressure chamber 9 in a flow-tight manner, so that the fluid is securely retained in the pressure chamber 9 and cannot escape from the master fitting 4 through the recess 19 and through the connection opening 13 . The sealing device 20 is designed as a sealing ring which sits on the plug 17 outside the pressure chamber 9 and/or the guide pot 14 . Another sealing device 20 is seated on the piston 10 in order to seal off the pressure chamber 9 from the transmission device 11 .

The spring device 12 is supported on the guide section 18 of the closure device 16 in the stroke direction 3 and on the piston 10 in the opposite direction. In this arrangement, the spring device 12 forms the restoring device for the piston 10 and a safety device for the closure device 16.

A bushing 23 is formed in the housing 8 of the master fitting 4 in the stroke direction 3 in front of the pressure chamber 9 . The bushing 23 has a constriction which forms an end stop 24 . The transmitter armature 4 comprises an elastic device 33 designed as a wire form spring, which is fixed in the housing 8 and also projects into the bushing 23 .

The connection device 5 is designed as an elongated plug with an integrated flow channel 28 that is open on both sides. The connection device 5 has a coupling section 21 and an insertion section 22 and is arranged unconnected to the master fitting 4 in the pre-assembly state 15 . The connection device 5 is plugged into the hydraulic line 6 with the coupling section 21 and fastened to the coupling section 21 in a form-fitting and/or friction-locking manner by means of barbs.

The plug-in section 22 has an outer contour that corresponds to the bushing 23 , the plug-in section 22 having a projection which forms a counter-stop 26 for the end stop 24 . The insertion section 22 has a groove 27 behind the projection in the lifting direction 3 .

The plug-in section 22 has an end piece 29 which forms a free end of the plug-in section 22 in the opposite direction. In the tail 29 is at least one inlet opening 30 is arranged, which is fluidically connected to the flow channel 28 .

The 2a and 2 B show process steps for connecting the hydraulic line 6 to the master fitting 4 by means of the connection device 5. As can be seen from FIG 1 can be seen, the hydraulic line 6, the connection device 5 and the factory-prefilled master fitting 4 of the set 1 are provided. The transmitter armature 4 is mounted on the steering device 25 of the vehicle. Before or after the connection device 5, as from the 1 to see, inserted with the coupling section 21 ahead in the hydraulic line 6, so that it is positively attached to it by means of the barbs. The connection device 5 connected in this way to the hydraulic line 6 is arranged coaxially to the main axis 3 , with the insertion section 22 being directed towards the master fitting 4 .

According to the 2a the connection device 5 is moved in the opposite direction into the socket 23 with the plug-in section 22 first. A spring force of the elastic device 33, through which the insertion section 22 is inserted, counteracts the inward movement. During insertion, the plug-in section 22 passes the connection opening 13 of the pressure chamber 9. With increasing inward movement, the plug-in section 22 reaches the closure device 16, in particular the plug 17 protruding through the recess 19, against which the plug-in section 22 is pressed with the end piece 29.

According to the 2 B the closure device 16 is moved in the opposite direction by the pressure against the plug 17 against the spring force of the spring device 12, with the guide section 18 being guided along the guide cup 14 and being transferred into a release position 36, in which the recess 19 and thus the connection opening 13 is open and/or released. In the release position 36 , an intermediate space 32 is formed between the end of the guide cup 14 pointing in the opposite direction and the guide section 18 .

While pressing against the plug 17, the insertion section 22 is moved through the sealing device 20 and the recess 19 until the sealing device 20 finally sits on the insertion section 22 in the stroke direction 3 behind the end piece 29 and seals the recess 19 from the pressure chamber 9. The insertion section 22 is inserted into the socket 23 until the counter-stop 26 rests against the end stop 24 and the end piece 29 is arranged in the intermediate space 32 . The elastic device 33 sits in the groove 27 and thereby secures the connection device 5 against undesired movement in the opposite direction. In this arrangement, the connection device 5 is arranged in a connection position 37 . In the connection position 37 of the connection device 5 , the master fitting 4 has a connection state 34 in which it is connected to the hydraulic line 6 by means of the connection device 5 .

In the connection position 37 a flow connection is formed between the pressure chamber 9 and the connection device 5 . When the piston 10 is actuated, the fluid in the pressure chamber 9 is displaced so that it can flow through the passage openings 31 into the intermediate space 32 and from there through the inlet opening 30 into the flow channel 28 of the connection device 5. The fluid can also flow through the Flow channel 28 flow into the hydraulic line 6.

reference list

1

set

2

main axis

3

stroke direction

4

master fitting

5

connection device

6

hydraulic line

7

master cylinder

8th

Housing

9

pressure room

10

Pistons

11

transmission facility

12

spring device

13

port opening

14

guide pot

15

pre-assembly condition

16

locking device

17

Plug

18

guide section

19

recess

20

sealing device

21

coupling section

22

plug-in section

23

Rifle

24

end stop

25

steering device

26

counterattack

27

groove

28

flow channel

29

tail

30

intake port

31

passage opening

32

space

33

elastic device

34

connection status

35

locking position

36

release position

37

connection position

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 3434543 B1 [0003]

Claims (10)

Set (1) consisting of a master fitting (4) and a connection device (5) for connecting the master fitting (4) to a hydraulic line (6) for a hydraulic system of a vehicle, the master fitting (4) changing from a pre-assembly state (15) to a Connection state (34) can be converted, the master fitting (4) and the connecting device (5) being unconnected in the pre-assembly state (15) and the master fitting (4) and the connecting device (5) being connected to one another in the connecting state (34), wherein the master fitting (4) comprises a hydraulic master cylinder (7), the master cylinder (7) defining a main axis (2) which runs in a stroke direction (3), the master cylinder (7) having a pressure chamber (9), wherein the pressure chamber (9) is pre-filled with a fluid, the pressure chamber (9) having a connection opening (13) for forming a flow connection with the hydraulic line (6), the master cylinder (7) having a closure device (16) for closing the connection opening ( 13), wherein the closure device (16) can be transferred from a closed position (35) to a release position (36), the connection opening (13) being closed in the closed position (35) and the connection opening (13) being in the release position ( 36) is open for the fluidic connection of the hydraulic line (6), characterized in that the closure device (16) can be transferred from the closed position (35) to the release position (36) by a movement in a direction opposite to the lifting direction (3). Set (1) after claim 1 , characterized in that the master fitting (4) in the closed position (35) assumes the pre-assembly state (15) and in the release position (36) assumes the connection state (34). Set (1) after claim 1 or 2 , characterized in that the master cylinder (7) comprises a guide pot (14) for guiding the closure device (16) during movement in the opposite direction, the guide pot (14) being arranged congruently with the connection opening (13) in the lifting direction (3). Recess (19), wherein the closure device (16) has a stopper (17) and a guide section (18) with at least one passage opening (31), the guide section (18) in the closed position (35) in the guide pot (14) is arranged and / or wherein the plug (17) in the closed position (35) protrudes through the recess (19) in the lifting direction (3) and closes the connection opening (13). Set (1) according to one of the preceding claims, characterized in that the master cylinder (7) has a spring device (12), the closure device (16) being held in the closed position (35) under spring force by the spring device (12). Set (1) after claim 3 or 4 , characterized in that the master cylinder (7) comprises a sealing device (20), the sealing device (20) sitting on the plug (17) in the closed position (35) and fluidically sealing the recess (19) in the guide pot (14). . Set (1) according to one of the preceding claims, characterized in that the connection device (5) has a coupling section (21) for coupling to the hydraulic line (6) and that the connection device (5) has an insertion section (22) for insertion into the master fitting (4) and for arranging the connection device (5) in a connection position (37), with a flow channel (28) being integrated in the connection device (5), with a flow connection between the pressure chamber (9) and the connection device (5) is formed. Set (1) after claim 6 , characterized in that the plug-in section (22) has an end piece (29), at least one inlet opening (30) being introduced into the end piece (29), the inlet opening (30) being fluidically connected to the flow channel (28), wherein the end piece (29) is arranged in the connection position (37) in the pressure chamber (9). Set (1) after claim 7 , characterized in that the closure device (16) is arranged in the release position (36) and/or that the master fitting (4) has the connection state (34) when the connection device (5) is arranged in the connection position (37), wherein the at least one passage opening (31) and the at least one inlet opening (30) form a flow connection to the flow channel (28) in the connection position (37) of the connection device (5). Vehicle with the set (1) according to one of the preceding claims. Method for fluidically connecting a hydraulic line (6) to a master fitting (4) by means of a connecting device (5), the master fitting (4) and the connection being one direction (5) Components of the set (1) according to one of Claims 1 until 8th are characterized by the following steps: • the coupling section (21) of the connection device (5) is coupled to the hydraulic line (6) • the plug-in section (22) is plugged into the master fitting (4) • during plugging in the end piece (29) of the plug-in section (22) into the pressure chamber (9), the plug-in section (22) transferring the closure device (16) from the closed position (35) to the release position (36).

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