WO2012016555A2

WO2012016555A2 - Door unit

Info

Publication number: WO2012016555A2
Application number: PCT/DE2011/001291
Authority: WO
Inventors: Bernhard Kordowski; Holger Schiffer
Original assignee: Kiekert Aktiengesellschaft
Priority date: 2010-06-17
Filing date: 2011-06-16
Publication date: 2012-02-09
Also published as: DE202010009188U1; WO2012016555A3

Abstract

The invention relates to a door unit, in particular motor vehicle door unit, with a damping device (5) which has a chamber (6) filled with a hydraulic medium and a displacer (7, 8) which is movable in at least one direction in the chamber (6), wherein the displacer (7, 8) is acted upon by a drive shaft (4) following the movement of a door wing (1), and the displacer (7, 8) is designed as an impeller (7, 8) and the chamber (6) is designed as a pump chamber (6) of a positive-displacement pump (6, 7, 8, 9).

Description

door unit

Description:

The invention relates to a door unit, in particular motor vehicle door unit, having a damping device which has a chamber filled with a hydraulic medium and a displaceable in the chamber in at least one direction displacement body, wherein the displacement body is acted upon by a drive of a door leaf following drive shaft.

As a rule, the damping device is connected to the door leaf. In addition, the damping device may be a locking device. The damping or locking device ensures that movements of the door wing experience a damping. In addition, with the help of the damping or locking device, an optional fixing of the door leaf in a certain (arbitrary) position can take place. Previous lock or damper work purely mechanically by a mounted on the door pin engages in a corresponding recess on the body latching. In addition, generic door units have become known from US Pat. No. 5,410,777. Here is a displacement body realized in the form of a wiper. The filled with the hydraulic medium chamber has a plurality of openings. Depending on a movement of the wiper, the liquid can be discharged through individual outlets connected to the openings. A circulation of the hydraulic medium is possible.

Since in the known teaching different openings and valves are acted upon depending on the direction of rotation of the displacement body, a relatively complex and complex structure is required. This also applies to the also generic teaching according to DE 20 2004 003 546 U1.

Based on this prior art, the invention is based on the technical problem of further developing such a door unit so that the design effort is significantly reduced with perfect function.

To solve this technical problem, a generic door unit, in particular motor vehicle door unit, in the context of the invention is characterized in that the displacement body are designed as impeller and the chamber as the pump chamber of a positive displacement pump.

In the context of the invention, therefore, form the displacement body and the chamber for receiving the displacement body and the hydraulic medium, a hydraulic machine or a positive displacement pump. That is, the displacement body and the impeller and the chamber and the pump chamber work together in such a way that the hydraulic medium is conveyed by self-contained volumes, as is the case with all positive displacement pumps. Any backflow of the hydraulic medium is prevented by one or more provided valves or flaps. In addition, the positive displacement pump in question is designed self-priming. That is, with the help of the impeller can be constructed within the pump chamber for sucking and conveying the hydraulic medium sufficient vacuum. In this context, it has further proven useful when a so-called variable displacement pump is used as a positive displacement pump. With the help of such a variable displacement pump, the amount of sucked and conveyed hydraulic medium can be set variably in principle.

In fact, it has proved to be particularly favorable if, in the context of the invention, the displacement pump is designed as a variable displacement pump and, in particular, a gear pump is used. In such a gear

Pump is a hydraulic machine, so a machine for conveying the hydraulic medium, which is basically used for the drive of hydraulic motors or can be. In general, gear pumps are a subspecies of the positive displacement pump and here a special displacement pump, namely the above-mentioned Verstelipumpe. The gear pump is composed in its basic structure of three components. First of all, the chamber or pump chamber is provided. This has at least one inlet and one outlet. Most often, one inlet is connected to one outlet through an associated port. In this way, the hydraulic medium is circulated.

In addition to the pump chamber, the gear pump according to the invention has two gears, one of which is driven, namely by means of the drive shaft. A movement of the door leaf is converted into such a drive shaft, which in turn acts on the driven gear of the gear pump. In detail, consequently, the impeller is divided into two with the already mentioned driving gear, which rotates eccentrically in an internal toothing of the pump chamber as a second gear. The driving gear and the internal toothing thus form the two gears meshing with one another in the realized gear pump for conveying the hydraulic medium. The gears each form self-contained volumes for conveying the hydraulic medium. The volumes can be changed in size. For this purpose, the position of the gears to each other and / or their expression to vary.

The internal gear is rotatably mounted in the pump chamber and defines an outer rotor. The internal gear or the outer rotor is rotated by rotational movements of the driving gear in rotation. In fact, the driving gear is usually formed as an associated with the drive shaft and associated inner rotor.

In addition, the invention proposes that the internal toothing or the outer rotor is rotatably mounted in an eccentric ring in the housing. The eccentric ring itself regularly has a fixed attachment in the housing. By this eccentric is ultimately ensured that the driving gear or coupled to the drive shaft inner rotor regardless of the direction of rotation of the drive shaft promotes the hydraulic fluid in the matching flow direction through the pump chamber. That is, according to the invention, the pump chamber need only be equipped with an inlet and an outlet on opposite sides of the housing. In this way, the invention ensures that the flow direction of the hydraulic medium through the opening channel communicating with the outlet is always the same regardless of the direction of rotation of the drive (clockwise rotation or counterclockwise rotation).

This is of particular importance because, according to the invention, only one inlet and only one outlet and only one opening channel are required in order to be able to represent the desired flow of the hydraulic medium. In fact, this flow of hydraulic medium is used to dampen the movement of the drive shaft and consequently the movement of the door leaf. For this purpose, the outlet of the pump chamber is usually associated with an opening valve. The opening valve may like a throttle in the flow direction

be preceded by the hydraulic medium. In addition, it has proven useful if the opening valve is designed as a check valve.

The opening valve and optionally the throttle are arranged in the opening channel. The design is such that the opening valve or check valve opens only when a certain opening pressure in the opening channel is reached or exceeded. As a result, a certain force must be applied to the door leaf acting on the drive shaft so that this opening pressure is reached. If the force is insufficient, the opening valve closes against spring force and the door leaf is held tight and blocked.

In order to allow a virtually resistance-free opening at least at the beginning of the opening movement of the door leaf, a further channel, namely an overflow channel, is usually realized in addition to the opening channel with opening valve and optionally throttle. Between the overflow channel and the opening channel can be switched by a valve. This valve provides in accordance with an opening angle of the door for the desired switching.

At the beginning of the opening movement of the door leaf - starting from its closed position - the valve may be switched so that the hydraulic medium is conveyed more or less resistance through the overflow channel by means of the positive displacement pump. If, however, the door leaf reaches appreciable opening angles of, for example, 20 ° or more relative to an associated motor vehicle body, the valve switches over. The hydraulic medium conveyed by door movements via the drive shaft, the inner rotor and the outer rotor must now first exceed the opening pressure already explained above, so that the hydraulic medium passes through the opening channel

can and revolves. As soon as this opening pressure is undershot, the opening valve closes and the door leaf is held or detected.

As another special feature, it is recommended that the opening channel and / or the overflow channel communicate with an expansion tank. This expansion tank ensures that the hydraulic medium in the opening channel or overflow channel is kept at a constant pressure.

A particularly compact and advantageous design is characterized in that the impeller, the pump chamber, the expansion tank and the one or more channels {opening channel and / or overflow channel) are arranged in a common housing. In this case, the housing in question is usually formed closed. In contrast to this closed housing, only the drive shaft, which interacts with the door leaf, is guided outwards. The drive shaft may mesh with a toothed rack which follows the movement of the door leaf. In principle, however, the drive shaft can also be connected directly to a hinge for the door leaf or even constitute a part of this hinge, for example the hinge axis.

As a result, a door unit is provided, which is characterized by a particularly compact and inexpensive construction. This is achieved in essence in that the damping device or locking device is equipped with a positive displacement pump for the circulating hydraulic medium, which promotes the hydraulic medium in only one direction. This achieves the invention by a gerotor pump special design.

In fact, the gerotor pump has an inner rotor and an outer rotor which is rotatably supported in an eccentric ring in the housing. To this

Way, the hydraulic medium is conveyed regardless of the direction of rotation of the drive shaft in each matching flow direction through the pump chamber. Consequently complicated and repeatedly designed for each direction of rotation opening channels, transfer channels, etc. are unnecessary. Rather, a single opening channel and / or overflow channel are sufficient.

Thereby, the entire damping device or locking device can be arranged in a closed housing, which also builds small. Consequently, the housing can be arranged directly in the region of a door hinge. Here are the main benefits.

In the following the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment; 1 shows an installation situation in a door unit according to the invention,

2 shows the damping device schematically,

Fig. 3 shows the pump chamber in a detailed view and

Fig. 4A) to D) different functional positions of the pump chamber in the promotion of the hydraulic medium.

In the figures, a door unit is shown, which is a motor vehicle door unit. The door unit has in its basic structure a door leaf 1 or pivot door leaf 1, which can be pivoted about a pivot point 2 in the direction indicated in FIG. 1 (see the double arrow). For this purpose, different pivot angles a correspond. At

the door or swing door 1 is a motion transmission member 3, 4 connected, which is supported on a body.

The motion transmission member 3, 4 is composed in its basic structure of a rack 3 with gear arrangement and a drive shaft 4 together. Since the rack 3 is connected to the pivot door 1 and there meshes with the drive shaft 4, the pivoting movements of the door leaf 1 shown in FIG. 1 correspond to the pivoting angle a, that the rack 3 is linearly reciprocated. These movements are transmitted via the gear arrangement to the drive shaft 4, which rotates logically. With the pivoting movement of the door leaf 1 to the pivot angle a, a corresponding travel s of the door leaf 1 is accompanied.

In Fig. 2, a damping device 5 is shown in detail, which is acted upon by the drive shaft 4 and connected by means of the drive shaft 4 to the door leaf 1. The damping device 5 has a filled with a hydraulic medium chamber 6. In the chamber 6, a displacement body 7, 8 is arranged, which can be seen in detail in FIG. The displacement body 7, 8 can be moved in at least one direction.

In fact, the displacer 7, 8 makes clockwise and counterclockwise rotations, as shown in detail in FIGS. 4A) to D). The rotational movements of the displacement body 7, 8 are caused by corresponding rotational movements of the displacement body 7, 8 driving drive shaft 4, which in turn follows the pivoting movements of the door leaf 1 by the pivot angle a.

In the context of the invention, the displacement body 7, 8 as the impeller 7, 8 and the chamber 6 is formed as a pump chamber 6. Overall, that form

Impeller 7, 8 and the pump chamber 6 taken together a positive displacement pump 6, 7, 8, 9, to which in the embodiment, an eccentric ring 9 belongs. According to the invention, a special displacement pump 6, 7, 8, 9 is used, namely a variable displacement pump, that is to say a positive displacement pump whose delivery volume can be adjusted. In the illustrated positive displacement pump 6, 7, 8, 9 is a gear pump in general and a ring gear pump 6, 7, 8, 9 in particular.

The impeller or the displacement body 7, 8 is designed in two parts. In fact, the impeller or the displacement body 7, 8 is composed of a driving gear 7 and an internal gear 8. The driving gear 7 is directly coupled to the drive shaft 4. In fact, the driving gear 7 has a plug-in recess 7 ', in which the drive shaft 4 is inserted to drive the driving gear 7 in the embodiment.

The driving gear 7 runs eccentrically in the internal toothing 8 of the pump chamber 6. For this purpose, the internal toothing 8 is rotatably mounted in the pump chamber 6. In fact, the driving gear 7 forms an inner rotor 7 as compared with the pumping chamber 6, whereas the inner gear 8 is designed as the outer rotor 8. The fixedly arranged in the housing 6 eccentric ring 9 receives the internal toothing and the outer rotor 8. For the internal toothing or the outer rotor 8 is rotatably mounted in the eccentric ring 9 in the housing 6.

In this way, the driving gear or the inner rotor 7 regardless of the direction of rotation of the drive shaft 4 (clockwise rotation and counterclockwise rotation) promotes the hydraulic medium in matching

Flow direction through the pump chamber 6. This can be seen with reference to FIGS. 4a) to d). The flow direction is indicated by arrows.

In fact, Figs. 4a) and 4b) show the conveyance of the hydraulic medium through the pump chamber 6 by means of the impeller 7, 8 in the event that the drive shaft 4 rotates clockwise, and consequently the inner rotor 7 also in the clockwise direction - as well as the outer rotor 8 - are driven. In contrast, Figs. 4c) and 4d) illustrate the situation that the drive shaft 4 rotates counterclockwise. This then also applies to the inner rotor 7 and the outer rotor 8.

It can be seen in a comparative consideration of Fig. 4a) to 4d) that regardless of the direction of rotation of the drive shaft 4, the hydraulic medium is conveyed in the embodiment consistently from left to right through the pump chamber 6. The hydraulic medium is circulated through the pump chamber 6. For this purpose, the pump chamber 6 is equipped with an inlet 10 and an outlet 11 for the hydraulic medium. In addition, an opening channel 12 is realized, which connects the outlet 11 with the inlet 10 and thus provides for the guidance of the hydraulic medium in the circuit in a single direction, regardless of the direction of rotation of the drive shaft 4. The interpret according to arrows in Fig. 2nd at.

It can be seen on the basis of FIG. 2 that the outlet 11 is assigned an opening valve 13. The opening valve 13 is a non-return valve 13, which has a spring-loaded ball. Only when the pressure built up with the aid of the displacement pump 6, 7, 8, 9 exceeds a certain opening pressure, the ball is lifted against an associated ball seat against the force of the spring and the hydraulic medium can enter through the outlet 11 in the opening channel 12 and in circulation be guided.

This situation only occurs when the drive shaft 4 ultimately driving door 1 is acted upon by a sufficient force. If the corresponding force is insufficient, the ball will return to its ball seat - acted upon by the spring - and the opening valve 13 will be closed. The door 1 undergoes a fixed division.

Not shown is the possibility that the opening valve 13, a throttle is connected upstream. In addition, a parallel to the opening channel 12 provided overflow channel can be realized, which, however, also not shown. The same applies to a valve which switches between the said overflow channel and the opening channel 12. This is usually done when the door 1 has swept over a pivot angle a of about 20 ° or more. As a result, the invention ensures that the first-time opening of the door leaf 1-starting from its closed position-takes place more or less without resistance and can also take place. Because in this situation, the hydraulic medium conveyed with the aid of the displacer respectively the impeller 7, 8 is guided almost without resistance through the overflow channel from its outlet to the inlet. Only when pivot angle a of 20 ° or more are swept by the door leaf 1, the addressed valve ensures that the overflow is no longer available for the guidance of the hydraulic medium. Rather, the hydraulic medium now has to be conveyed through the opening channel 12 in circulation. This is only possible if the hydraulic medium has exceeded the previously discussed opening pressure and opens the opening valve.

On the basis of the illustrations one recognizes still a compensation tank 14. The compensation tank 14 communicates in the exemplary embodiment with the opening

Channel 12 and ensures overall that inside the pump chamber 6, the pressure of the hydraulic medium is set constant or almost constant. It is clear from the representation according to FIG. 2 that the impeller or the displacement body 7, 8, the pump chamber 6, the expansion tank 14 and finally the one channel or opening channel 12 are arranged or received in a common housing 15. According to the embodiment, the housing 15 is closed. Only the interactive with the door leaf 1 drive shaft 4 is guided to the outside. Due to the few components in the interior of the housing 15, this can be designed to be compact and small, so that a direct arrangement in the region of a hinge for the door leaf 1 succeeds. It is even possible to integrate the housing 15 in question itself into the hinge. In this case, the drive shaft 4 may coincide with a hinge axis. This is not shown here.

Claims

claims:

1. door unit, in particular motor vehicle door unit, with a damping device (5) which has a filled with a hydraulic medium chamber (6) and in the chamber (6) movable in at least one direction displacement body (7, 8), wherein the displacement body (7, 8) is acted upon by a drive shaft (4) following the movement of a door leaf (1), characterized in that the displacement body (7, 8) serves as impeller (7, 8) and the chamber (6) as pump chamber (6). a positive displacement pump (6, 7, 8, 9) are formed.

2. door unit according to claim 1, characterized in that the positive displacement pump (6, 7, 8, 9) as a variable displacement pump, preferably gear pump, in particular gerotor pump (6, 7, 8, 9), is designed.

3. door unit according to claim 1 or 2, characterized in that the pump wheel (7, 8) is formed in two parts with a driving gear (7) which eccentrically in an internal toothing (8) of the pump chamber (6) rotates.

4. Door unit according to claim 3, characterized in that the internal toothing (8) is rotatably mounted in the pump chamber (6) and defines an outer rotor (8).

5. door unit according to claim 3 or 4, characterized in that the driving gear (7) as with the drive shaft (4) coupled to the inner rotor (7) is formed.

6. Door unit according to one of claims 3 to 5, characterized in that the internal toothing (8) is rotatably mounted in an eccentric ring (9) in the housing (6).

7. Door unit according to one of claims 3 to 6, characterized in that the driving gear (7) regardless of the direction of rotation of the drive shaft (4) promotes the hydraulic medium in the matching flow direction through the pump chamber (6).

8. Door unit according to one of claims 1 to 7, characterized in that the pump chamber (6) is equipped with an inlet (10) and an outlet (11) for the preferably circulated through an associated opening channel (12) guided hydraulic medium.

9. door unit according to claim 8, characterized in that the outlet (11) is associated with an opening valve (13), optionally with upstream throttle.

10. door unit according to claim 9, characterized in that the opening valve (13) is designed as a check valve (12).

11. door unit according to one of claims 8 to 10, characterized in that in addition to the opening channel (12) with the opening valve (13) and optionally the throttle an overflow is realized.

12. Door unit according to claim 11, characterized in that a valve is provided, which switches in accordance with an opening angle (a) of the door leaf (1) between the opening channel (12) and the overflow channel.

13. Door unit according to claim 11 or 12, characterized in that the opening channel (12) and / or the overflow channel communicate with a surge tank (14).

14. Door unit according to one of claims 1 to 13, characterized in that impeller (7, 8), the pump chamber (6), the surge tank (14) and the one or more channels (12) in a common housing (15) are arranged.

15. Door unit according to claim 14, characterized in that the housing (15) is formed closed, wherein only the with the door (1) interacting drive shaft (4) is guided to the outside.