DE102009016595B4 - hydraulic motor - Google Patents

Abstract

Hydraulic motor (1) for pivoting a component relative to a base part, the hydraulic motor (1) having a housing (2) in which a shaft (3) is mounted, the shaft (3) having a rotor ( 4), in particular at least one wing, which can rotate with the shaft (3) in a hydraulically actuated receiving chamber (5) in the housing (2), the shaft (3) in the housing (2) by means of at least two bearings (6 , 7) is rotatably mounted and each bearing (6, 7) is assigned at least one sealing element (8), characterized in that the bearing (6, 7) has an inner ring (9) and an outer ring (10), the two bearing rings (9, 10) together in their lateral region (11) facing away from the receiving chamber (5) form a receiving space (12) for the sealing element (8), the sealing element (8) having at least one sealing lip (13) which on one of the bearing rings (9, 10) or on a component connected to it rubbing ...

Description

The invention relates to a hydraulic motor for pivoting a component relative to a base part, wherein the hydraulic motor has a housing in which a shaft is mounted, wherein the shaft rotatably connected to its fluidbeaufschlagbaren rotor, in particular at least one wing carries, in a hydraulic acted upon receiving chamber can rotate in the housing with the shaft, wherein the shaft is rotatably mounted in the housing by means of at least two bearings and wherein each bearing is associated with at least one sealing element.

A hydraulic motor of the type mentioned is for example from the DD 263 803 A1 known. The engine is operated with pressurized hydraulic oil. In this case, the hydraulic oil is passed into a receiving chamber of a housing in which a wing is rotatably connected to a shaft. By entering the hydraulic fluid, the shaft equipped with the wing rotates relative to the housing and can thus perform an adjusting movement.

Other similar hydraulic motors are from the DD 240 767 A1 , from the DE 198 12 477 A1 and from the DE 917 043 B known.

The DE 2754 168 A1 discloses a shaft seal in which a high-pressure space is sealed from a low-pressure side by means of a sealing ring.

A special and presently preferred application of such a hydraulic motor is the rotary actuator of a convertible roof. To open and shoot the roof, a component, namely a part of the roof, relative to a base, namely the body of the vehicle to be pivoted. In this case, a hydraulic motor are each arranged in the two lateral regions of the roof, which are supplied by a common hydraulic pump with pressure oil.

A particular problem with the use of generic hydraulic motors is that they must be sealed particularly effectively. In the previously known solutions seals are used for this purpose, which usually occupy either a considerable amount of space or have no adequate sealing effect. This is especially true in the light of the fact that in the hydraulic motor working pressures can occur at 180 bar.

The invention is therefore based on the object, a hydraulic motor of the type mentioned in such a way that the most effective possible sealing of the engine is given, although a very compact design is desired. In this case, a high density of the hydraulic motor is sought in particular in applications in the automobile, in which a pivoting movement for the purpose of setting components is required. In particular, it is intended for the pivoting movement, which must perform a convertible roof to get from the closed to the open state or vice versa.

The solution of this problem by the invention is characterized in that the bearing has an inner ring and an outer ring, wherein the two bearing rings together form a receiving space for the sealing element in its side facing away from the receiving chamber lateral region, wherein the sealing element has at least one sealing lip, the rubbing against one of the bearing rings or on a component connected thereto, wherein the two bearing rings each have an L-shaped contour in radial section and wherein the L-shaped bearing rings are arranged offset from one another so that they form the receiving space for the sealing element between them ,

The sealing element is preferably formed in a radial section V-shaped and has two legs, wherein the lying between the legs V-shaped space facing the receiving chamber.

The receiving space for the sealing element may have on one of the bearing rings a receiving chamber facing end face on which the sealing element bears axially.

The bearing may be a rolling bearing. In this case, specifically intended for a cylindrical roller bearing, in particular a full complement cylindrical roller bearing.

The bearing is preferred, however, a plain bearing. This may have a material pairing steel-bronze; A material combination of steel composite material has also proven itself.

Between the two bearing rings can still be arranged a thrust washer, which rests against formed on the bearing rings end faces and is in sliding contact with at least one of the bearing rings. The thrust washer is preferably made of plastic material. At least one of the bearing rings may have an undercut forming portion which forms an axial stop for the thrust washer. In this way, a pre-assembled captive unit can be formed.

Between at least one of the bearing rings and a seat in the housing, a static sealing element, in particular an O-ring, can be arranged.

The proposed hydraulic motor is preferably part of a movement device of a convertible roof.

Due to the proposed embodiment, axial and radial forces can be transmitted separately. In this case, an optimal and compact sealing of the bearing is achieved, so that the hydraulic space of the hydraulic motor is reliably tight.

The sealing element is advantageously only by the bearing components, d. H. through the inner and outer ring, centered.

In the drawings, embodiments of the invention are shown. Show it:

1 a hydraulic motor in front view,

2 a radial section through the hydraulic motor according to the section AA of 1 .

3 the detail "B" of the hydraulic motor according to 2 according to a first embodiment of the invention and

4 the detail "B" of the hydraulic motor according to 2 according to a second embodiment of the invention.

In 1 a hydraulic engine 1 as used herein to move in a motor vehicle, which is designed as a convertible, the roof construction by a hydromotor-induced pivoting movement from an open position to a closed position (or vice versa). For this purpose, a hydraulic motor is in each side of the vehicle 1 arranged, which are supplied by a common pressure fluid pump with pressure oil. The hydraulic motor 1 has a housing 2 in which a wave 3 is rotatably arranged. The rotation of the shaft 3 is caused by appropriate pressurization of the hydraulic motor with pressure oil. Details, ie about the general operation of a hydraulic motor, are for example in the DD 263 803 A1 to which reference is made.

The closer construction of the hydraulic motor 1 comes from 2 out. Here you can see that the wave 3 in the case 2 by means of two bearings 6 and 7 is stored, so the shaft 3 relative to the housing 2 can rotate. Rotationally with the shaft 3 connected are wings 4 that act as a rotor. The wings 4 are in a receiving chamber 5 arranged, which can be pressurized so that the wing 4 in the circumferential direction of the shaft 3 is displaced, causing the pivotal movement of the shaft 3 relative to the housing 2 arises.

The sealing of the hydraulic motor 1 against the located in its interior pressure oil is of great importance. How this is done in the present case results from the detailed views according to 3 and 4 that illustrate alternative solutions.

In 3 can be seen that the camp 6 is designed as a plain bearing, which is an inner ring 9 and an outer ring 10 having, wherein the outer ring of two parts 10 ' and 10 '' exists, which are rotatably connected to each other, for. B. by caulking 24 , In a side area 11 of the camp 6 coming from the receiving chamber 5 is facing away, is a sealing element 8th arranged.

It is essential that the two bearing rings 9 and 10 together in her from the reception room 5 opposite lateral area 11 a recording room 12 for the sealing element 8th form. The sealing element 8th has at least one sealing lip 13 on one of the bearing rings - in the present case on the bearing ring 10 - starts rubbing.

The sealing element 8th is V-shaped in radial section, ie it has two legs 14 and 15 on, which form a V-shaped annular cavity between them. This cavity is towards the receiving chamber 5 - in 3 so to the right - aligned. Is hydraulic oil from the receiving chamber 5 coming to the sealing element 8th thus, the upper leg becomes 14 with the sealing lip 13 due to the fluid pressure against its contact surface on the outer ring 10 pressed, so that a high degree of tightness is given.

The sealing element 8th himself sits in his approximately rectangular shaped receiving space 12 where one end face 16 on the inner ring 9 an axial bearing surface for the sealing element 8th forms.

For transmitting axial loads is in the embodiment according to 3 a thrust washer 17 provided, which consists of polymer material and thus has good sliding bearing properties. The thrust washer 17 lies on the inner ring 9 on a front side 18 while on the outer ring 10 on a front side 19 is applied. During the rotation of the hydraulic motor 1 thus creates sliding contact between the thrust washer 17 and at least one of the bearing rings 9 or 10 ,

The thrust washer 17 may be provided in its axial end regions with pocket-shaped recesses on the surface. As a result, not only the lubricating film structure can be favored, there is also the possibility to absorb abrasion from the sliding pair.

The aim is that the thrust washer with the bearing assembly forms a captive element. Therefore, the outer ring 10 in the lateral area 11 a radially inwardly extending portion 20 on, for the mounted thrust washer 17 an axial bearing, ie forms an undercut, so that the thrust washer 17 can not get out of their mounted position.

The radial height of the section 20 is chosen so that, taking advantage of the radial elasticity of the thrust washer 17 Assemblability is given, ie the thrust washer 17 snaps into their final position as soon as they move axially the section 20 has overcome.

The warehouse 6 itself is opposite the case 2 or opposite the shaft 3 in his cylindrical seats 21 and 22 in the case 2 or in the wave 3 are incorporated by static sealing elements 23 sealed for example in the form of O-rings.

In addition, right next to the camp 6 another sealing element 25 be provided, which is a pre-seal against the receiving chamber 5 performs.

In the solution according to 4 is different from that according to 3 especially provided that no thrust washer 17 is used. Otherwise, the structure of the hydraulic motor is very similar to that in the case of the solution according to 3 ,

Here are the bearings 6 . 7 designed as a plain bearing. Accordingly, a suitable sliding pair is provided to ensure a favorable sliding behavior. For example, steel-bronze pairings or even those in which a steel component slides with a composite component have proven successful. In the case of composite material, special polytetrafluoroethylene (PTFE) has proven its worth, which starts on a steel mating surface.

The lubrication of the sliding components takes place in an advantageous manner by the hydraulic oil itself, which is to be sealed.

Alternatively, the use of a rolling bearing is possible, in particular, a full complement cylindrical roller bearing has proven.

LIST OF REFERENCE NUMBERS

1

hydraulic motor

2

casing

3

wave

4

Rotor (wing)

5

receiving chamber

6

camp

7

camp

8th

sealing element

9

inner ring

10

outer ring

10 '

Part of the outer ring

10 ''

Part of the outer ring

11

lateral area

12

accommodation space

13

sealing lip

14

leg

15

leg

16

face

17

thrust washer

18

front

19

front

20

section

21

seat

22

seat

23

sealing element

24

caulking

25

sealing element

Claims (13)

Hydraulic motor ( 1 ) for pivoting a component relative to a base, wherein the hydraulic motor ( 1 ) a housing ( 2 ), in which a shaft ( 3 ), wherein the shaft ( 3 ) a rotatably connected fluid-impingable rotor ( 4 ), in particular at least one wing carries, which in a hydraulically loadable receiving chamber ( 5 ) in the housing ( 2 ) with the wave ( 3 ), whereby the shaft ( 3 ) in the housing ( 2 ) by means of at least two bearings ( 6 . 7 ) is rotatably mounted and each bearing ( 6 . 7 ) at least one sealing element ( 8th ), characterized in that the bearing ( 6 . 7 ) an inner ring ( 9 ) and an outer ring ( 10 ), wherein the two bearing rings ( 9 . 10 ) together in her from the reception room ( 5 ) facing away from the lateral area ( 11 ) a recording room ( 12 ) for the sealing element ( 8th ), wherein the sealing element ( 8th ) at least one sealing lip ( 13 ), which on one of the bearing rings ( 9 . 10 ) or rubbing against a component connected thereto, wherein the two bearing rings ( 9 . 10 ) in radial section each have an L-shaped contour and wherein the L-shaped bearing rings ( 9 . 10 ) are staggered so that they between them the receiving space ( 12 ) for the sealing element ( 8th ) form. Hydraulic motor according to claim 1, characterized in that the sealing element ( 8th ) is formed in a radial section V-shaped and two legs ( 14 . 15 ), wherein the between the legs ( 14 . 15 ) lying V-shaped space of the receiving chamber ( 5 ) is facing. Hydraulic motor according to claim 1 or 2, characterized in that the receiving space ( 12 ) for the sealing element ( 8th ) on one of the bearing rings ( 9 . 10 ) one of the receiving chamber ( 5 ) facing end face ( 16 ), on which the sealing element ( 8th ) abuts axially. Hydraulic motor according to one of claims 1 to 3, characterized in that the bearing ( 6 . 7 ) is a rolling bearing. Hydraulic motor according to claim 4, characterized in that the bearing ( 6 . 7 ) is a cylindrical roller bearing, in particular a full complement cylindrical roller bearing is. Hydraulic motor according to one of claims 1 to 3, characterized in that the bearing ( 6 . 7 ) is a sliding bearing. Hydraulic motor according to claim 6, characterized in that the sliding bearing ( 6 . 7 ) has a material pairing steel-bronze. Hydraulic motor according to claim 6, characterized in that the sliding bearing ( 6 . 7 ) has a material combination of steel composite material. Hydraulic motor according to one of claims 1 to 8, characterized in that between the two bearing rings ( 9 . 10 ) a thrust washer ( 17 ) which is attached to the bearing rings ( 9 . 10 ) trained end faces ( 18 . 19 ) and with at least one of the bearing rings ( 9 . 10 ) is in sliding contact. Hydraulic motor according to claim 9, characterized in that the thrust washer ( 17 ) consists of plastic material. Hydraulic motor according to claim 9 or 10, characterized in that at least one of the bearing rings ( 9 . 10 ) a section forming an undercut ( 20 ), which for the thrust washer ( 17 ) forms an axial stop. Hydraulic motor according to one of claims 1 to 11, characterized in that between at least one of the bearing rings ( 9 . 10 ) and a seat ( 21 . 22 ) in the housing ( 2 ) a static sealing element ( 23 ), in particular an O-ring, is arranged. Hydraulic motor according to one of claims 1 to 12, characterized in that it is part of a movement device of a convertible roof.

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