DE102005005891B4 - Door with door brake - Google Patents

Abstract

Door, in particular for a motor vehicle, having a door brake (18) which comprises a brake rod (20) on which acts a braking device which can be released by means of at least one manual operating handle and which comprises at least one hydraulic cylinder (24), the piston (28) of which is connected to the brake rod, wherein the hydraulic cylinder (24) is a double-acting cylinder, whose two chambers (30, 32) are each connected via a connection channel (34, 36) with a hydraulic circuit for each chamber (30, 32) a switching valve (40, 42), characterized in that a ramp is provided, which cooperates with a mechanical actuator, which acts via a mechanical connection to the braking device, and the switching valves (40, 42) up to a certain opening angle of the Door, preferably 15 °, keeps open.

Description

The Invention relates to a door, especially for a motor vehicle, having the features according to the preamble of the claim 1.

Such a door is from the document DE 44 00 784 C1 is known and is equipped with a door brake, which comprises a brake rod, which acts on a braking device which is releasable by means of a manual operation handle and comprises a hydraulic cylinder whose piston is connected to the brake rod. The hydraulic cylinder is a double-acting cylinder, the two chambers are each connected via a connection channel with a hydraulic circuit having a switching valve for each chamber. However, the door can always be pivoted without damage, if a arranged in the region of a door handle control switch is actuated.

From the publication DE 35 19 203 A1 an adjusting device for a door of a motor vehicle is known, which is articulated pivotably on a body-side door pillar, via an inner and outer handle is actuated and comprises a disposed between the door pillar and the vehicle door piston-cylinder unit. The piston cooperates with an inner valve, which separates two working chambers of the cylinder against each other. The inner valve is held on the piston under the tension of a spring such that, when the vehicle door is opened, the passage openings are closed and, when the vehicle door is closed, the passage openings of the piston-cylinder unit are permeable to medium.

From the publication DE 44 03 703 C1 is a door locking device is known, which is provided with a fixed on the one hand to the vehicle door and on the other hand to a door frame door locking element for stepless determination of the door in any door position. Furthermore, an actuating member for controlling the door locking element is provided, which is designed as a training and entry-auxiliary handle, which can serve as a training or entry aid in a training and boarding auxiliary position and at the same time keeps the door locking element controlled in the door locking position.

From the publication DE 39 37 220 A1 a door check for motor vehicle doors is known in which a door retaining bar is surrounded by a wrap spring, which is associated with a remote-controlled release device.

From the DE 44 04 467 A1 discloses a door fastener for vehicle doors, which forms a hydraulic, closed system which acts on a piston rod connected to the door.

From the DE 1 459 182 B a door brake is known, are arranged in the throttles and / or check valves within a piston of a hydraulic cylinder, by means of which a hydraulic flow between the chambers of the hydraulic cylinder is controllable.

From the publication DE 36 02 405 A1 an actuator for a motor vehicle door is known, which is actuated via an inner and outer handle and which comprises a arranged between a door pillar and the vehicle door piston-cylinder unit. This adjusting device has a provided with a passage opening for a pressure medium piston which cooperates with a two working chambers of the cylinder against each other separating the inner valve.

From the publication DE 40 25 510 A1 is a controllable motor vehicle door lock known, which serves for stepless and secure fixing of the door in any open position. On an associated with the door door retaining rod acts an electromagnetic and controllable in dependence on the door control actuator which constitutes a locking device.

From the publication DE 42 39 172 C1 a door brake is known, which is provided with egg nem check valve for pilot control of a tap valve.

From the publication EP 0 426 953 B1 a mechanical door lock for motor vehicle doors is known in which a support rod, which is connected to the door, is encompassed by a lockable retaining spring.

From the publication DE 42 24 132 A1 a door locking system is known in which a piston rod of a hydraulic cylinder is connected to the door. A volume exchange between the working spaces of the hydraulic cylinder is controllable with a blocking valve.

From the DE 103 20 148 A1 a door with a door brake is known, by means of which an unintentional pivoting of a door of a motor vehicle can be prevented. The door brake comprises a door-mounted braking device which acts on a brake rod, which is articulated at one end articulated to a body portion of the vehicle. The braking device comprises an actuator. An electric motor of the actuator drives a mechanism which acts on a surrounding a bushing wrap spring. The bush is penetrated by the brake rod. In a locked state acts on the socket, a clamping force on the brake rod, so that a pivoting of the door is prevented. To release the clamping force by means of the actuator in Abhän solved by a motive power applied to the door. Below a threshold value for the motive force, braking is initiated by the braking device, and when the threshold value is exceeded, the braking device is caused to be brought into the release state. Through the use of an electric motor, the door brake is not actuated independently of the electrical system of the motor vehicle. Also, this braking device has a complicated mechanical structure.

Of Further are from practice door brakes known, in dependence from the closing or opening speed the door in question are. In such a solution is to solve the door brake a greater resistance to overcome. If the door then set in motion, the panning process stops when closing by holding the door by a user.

Of the Invention is based on the object, a door of the introduction mentioned Genus with a door brake to create a stop of the door in any pivot position allows.

These Task is according to the invention by a Door with the features of claim 1.

Of the The essence of the invention is therefore that the braking device from an operator by operation of the at least one manual operating handle specifically offset in a release state or a braking state can be. This is basically possible in any pivot position of the door. By loosening the Braking device by means of the manual operating handle is when pivoting the door essentially to overcome any resistance exerted by the braking device on the door resistance. Rather, the door can over its pivoting range Delicate be stopped in any position.

Around an operation or a release the braking device with a low force through the To enable users the braking device of the door according to the invention comprises at least a hydraulic cylinder whose piston is connected to the brake rod is. In this case, the inflow or outflow of hydraulic fluid into a chamber of the hydraulic cylinder simply by pressing a Valve be locked or released. Unlike one mechanical solution does not need a complicated translation in such a hydraulic solution be provided by means of the forces acting on a bearable hand force be transposed.

Of the Hydraulic cylinder is a double-acting cylinder, both of which Chambers each about a connection channel with a preferably common hydraulic circuit connected for each Chamber has a switching valve. When the switching valves are open the piston of the hydraulic cylinder freely movable, and when closed Shift valves is the movement of the piston of the hydraulic cylinder blocked. When pivoting the door, the piston of the hydraulic cylinder moves and so does the hydraulic fluid moved in the two chambers. By closing the two Switch and brake valves, the door is hydraulically blocked.

Around the possibility to offer the door without operation of the manual operation handle from an almost closed state, e.g. B. from a leaning Condition to a closed state is a ramp provided, at least in the substantially closed state the door keeps the valves of the two chambers open. This ramp then works with a mechanical actuator, like a lever or a Bowden cable, put that over one mechanical connection acts on the braking device. Preferably the ramp is designed to hold the valves up to an opening angle the door of for example 15 ° open holds. The Door can thus free within this range without actuation of any of the operating handles be swung and thrown.

at an expedient embodiment of the Door behind The invention is the manual operation handle a door unlocking handle, which is usually provided anyway on a vehicle door. The door unlocking handle can be attached to the vehicle outside Handle or even attached to the vehicle interior handle be. Preferably, both act on the vehicle outside attached handle as well as attached to the vehicle interior Handle as a hand-operated handle for the braking device. When pressed of the respective door handle a release takes place the braking device, so that the brake rod is substantially free is mobile. At rest, the door release handles are located the braking device preferably in the locked position.

Especially On the side of the vehicle interior can also have a separate brake or additional handle be provided, which is a usual Türentriegelungsgriff is assigned and shared with this or separately from this actuated is.

Around temperature-related volume changes the hydraulic fluid to be able to compensate is the hydraulic circuit in a preferred embodiment of the door after the Invention provided with a surge tank, in which preferably a spring-biased piston on a hydraulic fluid reservoir acts.

Around Make sure the hydraulic cylinder and the associated Hydraulic circuit at a force when closed switching valves on the door exercised is not destroyed is, are the connection channels the chambers in a preferred embodiment via at least one bypass line connected to each other, in which a pressure relief valve is arranged. Instead of a pressure relief valve may also be provided in the bypass line, a throttle or the like.

The door brake is preferably designed so that the brake rod pivoting in Area of a body-mounted part of a door hinge is hinged and the braking device on the door is fixed. It is conceivable, of course Also, to design the brake device body-fixed and the brake rod pivotable at the door to fix.

Around the braking device independently from an electrical wiring system, it is advantageous if the operation the switching valves are mechanically.

Further Advantages and advantageous embodiments of the subject to The invention are the description, the drawings and the claims removed.

One embodiment an inventively designed vehicle door is shown schematically simplified in the drawing and will explained in more detail in the following description.

The single figure shows a door with a wiring diagram of a door brake.

In the drawing is a door 10 of a passenger car, not shown in detail, represented by a hinge 12 pivotable on a vehicle body 16 is articulated. The pivot axis of the door 10 is from a hinge axis 14 educated. From the hinge 12 is shown in the drawing a body-mounted part.

The door 10 is equipped with a hydraulically effective door brake 18 provided a brake rod 20 Includes, over a joint 22 so on the body-fixed part of the hinge 12 is fixed, that it is pivotable in a substantially horizontal plane. The joint 22 is from the hinge axis 14 spaced.

The brake rod 20 engages in the present embodiment, a brake device associated with a hydraulic cylinder 24 that has a tab 26 to the door 10 is connected. The brake rod 20 is with a piston 28 of the hydraulic cylinder 24 connected. The hydraulic cylinder 24 is designed as a double-acting cylinder, so that in a housing of the hydraulic cylinder 24 guided pistons 28 a first chamber 30 of the hydraulic cylinder 24 from a second chamber 32 of the hydraulic cylinder 24 separates.

In the present case, the piston sits 28 on the brake rod 20 , so the brake rod 20 the hydraulic cylinder 24 fully enforced. But it is also conceivable that the piston 28 at the free end of the brake rod 20 is arranged so that the second chamber 32 Hyd raulikzylinders 24 not from the brake rod 20 would be penetrated.

The first chamber 30 of the hydraulic cylinder 24 is with a first connection or connection channel 34 and the second chamber 32 of the hydraulic cylinder 24 is with a second connection or connection channel 36 connected. The two connection channels 34 and 36 lead to a valve unit 38 that is a first switching valve 40 and a second switching valve 42 comprises, which are actuated together and by means of a spring 44 are biased in the closing direction. To open the switching valves 40 and 42 is the valve unit 38 with an actuating device 46 provided, on the one hand comprises two operating handles not shown in detail in the drawing and on the other hand a lever which cooperates up to an opening angle of the door of 15 ° with a body-mounted ramp. One of the operating handles is on the outside of the door 10 provided unlocking handle for a door lock and the other operating handle is a on the inside of the door 10 provided handle for unlocking the door lock.

Upon actuation of the actuator 46 become the switching valves 40 and 42 each switched in the open position, whereby a bridge line 48 a fluid flow between the first chamber 30 and the second chamber 32 of the hydraulic cylinder 24 is released. When opening the door 10 and thus by the pivoting of the door 10 taking place offset of the piston 28 of the cylinder 24 Hydraulic fluid flows out of the second chamber 32 over the second connection channel 36 , the second switching valve 42 , the bridge line 48 , the first switching valve 40 and the first connection line 34 in the first chamber 30 of the hydraulic cylinder 24 , When closing the door 10 the fluid flow has a reverse direction.

By operating the actuator 46 So are the switching valves 40 and 42 against the force of the spring 44 open, leaving the piston 28 of the hydraulic cylinder 24 can be moved substantially without resistance in the cylinder housing, whereby the hydraulic fluid is displaced in the cylinder. When the switching valves 40 . 42 be closed, the fluid flow between the two chambers 30 and 32 of the hydraulic cylinder DERS 24 locked, causing a hydraulic lock on the door 10 leads.

Furthermore, between the first connection channel 34 and the second connection channel 36 two bridging lines 56 and 58 arranged, in each case designed as a check valve overpressure valve 60 respectively. 62 is arranged. The pressure relief valves 60 and 62 Prevent a force coming from closed switching valves 40 . 42 on the door 10 is exercised, leads to destruction of the hydraulic equipment. The door 10 can therefore also with closed switching valves 40 and 42 ie without actuation of the brake device 18 be moved, but only with an increased effort.

To a temperature-induced change in volume of the hydraulic fluid in the hydraulic cylinder 24 , the wires 34 . 36 . 48 . 56 . 58 and the switching valves 38 . 40 Compensating for a comprehensive hydraulic circuit is the bridge line 48 with a surge tank 50 connected, in which a supply of hydraulic fluid is held on the one by means of a spring 52 preloaded piston 54 acts. It is thus automatically adjusted if necessary hydraulic fluid.

By using a hydraulic system, the forces to release the braking device 18 kept small. The necessary transmission elements are not exposed to great forces.

10

door

12

hinge

14

hinge axis

16

vehicle body

18

door brake

20

brake rod

22

joint

24

hydraulic cylinders

26

flap

28

piston

30

First chamber

32

Second chamber

34

first access channel

36

second access channel

38

valve unit

40

first switching valve

42

second switching valve

44

feather

46

actuator

48

bridge line

50

surge tank

52

feather

54

piston

56

bypass line

58

bypass line

60

Pressure relief valve

62

Pressure relief valve

Claims (7)

Door, in particular for a motor vehicle, with a door brake ( 18 ), which has a brake rod ( 20 ), on which acts a braking device, which is releasable by means of at least one manual operating handle and the at least one hydraulic cylinder ( 24 ) whose piston ( 28 ) is connected to the brake rod, wherein the hydraulic cylinder ( 24 ) is a double-acting cylinder whose two chambers ( 30 . 32 ) each via a connection channel ( 34 . 36 ) are connected to a hydraulic circuit for each chamber ( 30 . 32 ) On-off valve ( 40 . 42 ), characterized in that a ramp is provided, which cooperates with a mechanical actuator, which acts via a mechanical connection to the braking device, and the switching valves ( 40 . 42 ) up to a certain opening angle of the door, preferably 15 °, keeps open. door according to claim 1, characterized in that the manual operation handle a door unlocking handle is. door according to claim 1, characterized in that the manual operation handle an additional handle is a door unlocking handle assigned. Door according to claim 1, characterized in that the hydraulic circuit a compensation tank ( 50 ), in which preferably one by means of a spring ( 52 ) pre-tensioned piston ( 54 ) acts on a hydraulic fluid reservoir. Door according to claim 1, characterized in that the connection channels ( 34 . 36 ) of the chambers ( 30 . 32 ) of the hydraulic cylinder ( 24 ) via at least one bridging line ( 56 . 58 ), in which a pressure relief valve ( 60 . 62 ) or a throttle is arranged. Door according to one of claims 1 to 5, characterized in that the brake rod ( 20 ) in the region of a body-mounted part of a door hinge ( 12 ) is pivotally hinged and the braking device on the door ( 10 ) is fixed. Door according to claim 1, characterized in that the door brake ( 18 ) is mechanically actuated.