DE102008038788A1 - Roller bearing arrangement for use in constant mesh transmission without mechanical synchronization of lorry, has drive shaft mounted opposite to drive housing above roller bearing and marking wheel attached on bearing ring - Google Patents

Abstract

The arrangement (16) has a roller bearing (5) e.g. ball bearing, including bearing ring (7), which is rollingly mounted on roller bodies. A marking wheel (8) i.e. pulse wheel, is attached as a separate component on the ring. A driveshaft (4) e.g. countershaft, is mounted opposite to a drive housing (2) above the bearing. The marking wheel is connected with ring in force-fit, form-fit, friction-fit and/or material engagement manner. The marking wheel is arranged in an oil sump region of the housing. The wheel is provided with a cylindrical shell shaped or flange shaped marking field (9). An independent claim is also included for a drive including a control device.

Description

The The invention relates to a rolling bearing arrangement with a marking wheel and with a rolling bearing, wherein the rolling bearing a Variety of rolling elements and at least one Has bearing ring, wherein the bearing ring on the rolling elements is stored rolling and wherein the marking wheel as separate component is mounted on the bearing ring. The invention also relates to a transmission with this rolling bearing assembly.

to Control of anti-lock braking systems, it is necessary to provide accurate measurement data on the current speed and possibly acceleration of individual Get wheels of a motor vehicle. Usually are in vehicles with anti-lock brakes appropriate sensor systems provided at the wheel bearings.

For example, the document describes DE 8814620 U1 a rolling bearing with a pulse ring for anti-lock braking systems. This rolling bearing has a, in operation rotating race, on which a pulse ring is placed for an anti-lock braking system, wherein the existing of sheet metal impulse ring is fixed by form-fitting partial sections on the race.

Probably the next coming state of the art is the document EP 701133 A1 , which also relates to a wheel bearing unit with an integrated sensor arrangement. In a first embodiment, the pulse ring of the sensor device is placed on an inner ring of the wheel bearing unit. The pulse ring comprises an axially extending tubular portion having markings in the form of apertures which are scanned by a sensor having a radial measuring direction. In a second embodiment in the same document another impulse ring has a radially extending flange with markings in the form of apertures which are scanned by a sensor whose measuring direction extends in the axial direction.

Of the Invention is based on the object, a rolling bearing assembly to propose which downstream components speed information can transmit to the control of a vehicle.

These Task is a rolling bearing assembly with the features of claim 1 and by a transmission having the features of the claim 10 solved. Preferred or advantageous embodiments The invention will become apparent from the dependent claims, the following description and the accompanying figures.

The Rolling arrangement according to the invention is preferred for use in a vehicle, in particular in a truck, and / or for storage of drive torque transmitting components, especially suitable and / or designed in a drive train. The rolling bearing assembly has a marking wheel with markings on, wherein the markings are functionally designed such that these can be scanned by a sensor arrangement. The markings are preferably regular to each other spaced apart. Preferably, the labels are for use suitable and / or formed in an incremental measuring method. The number of labels is preferably more than 40, in particular more than 80. Preferably, the marking wheel designed as a pole.

The Rolling bearing assembly comprises a rolling bearing, which in principle can be any embodiment, preferably However, it is as a tapered roller bearing or a deep groove ball bearing educated. The rolling bearing shows a large number of rolling elements, which, for example, in a row, but possibly also arranged in two or more rows. A bearing ring, preferably a bearing inner ring, is on these rolling elements or a subgroup of it rolling off. The bearing ring may be formed as a separate bearing ring, alternatively the bearing ring integrated in a more complex component as a subsection.

The Marking wheel is preferably formed as a sheet metal part and is mounted as a separate component on the bearing ring, so that it rotates with the bearing ring or rotatably connected with this is.

in the Frame of the invention and delimited from the state The technique is proposed that the rolling bearing assembly a transmission housing and a transmission shaft, in particular an output shaft, countershaft, input or drive shaft, includes, wherein the transmission shaft via the rolling bearing is mounted opposite the transmission housing. In the gearbox can be next to the gear shaft be integrated with other waves. The gearbox can be formed for receiving any gear. Prefers The gearbox is a truck gearbox formed and the transmission shaft as the output shaft between the Gear housing and a rear axle, in particular Rear axle differential arranged. Alternatively, the gearbox as a differential gearbox, transfer case, manual or be formed automatic transmission. The rolling bearing is preferred in a region of the drive train before a distribution of the drive torque arranged on several torque paths.

The Invention is based on the consideration that it is for Example also necessary for an electronically controlled transmission is, accurate information about the speed and / or To determine the direction of rotation to the gearbox sufficiently accurately and in particular to be able to control wear with little wear. The use of the measuring signals from the wheel bearing is for this purpose often not suitable because the sampling too low or the signal too inaccurate for precise transmission control is. Furthermore, especially at low vehicle speeds, such as when maneuvering, the information of wheel bearings with sensors too inaccurate.

The constructive embodiment of the invention in the form of a bearing ring and a marking wheel mounted thereon has the advantage that the pre-assembly of this arrangement z. B. in the bearing manufacturer can be performed in high accuracy, in particular can on the axial position of the marking wheel on the bearing ring and a defined overlap of the marker wheel seat be respected. These pre-assembled and consequently low-tolerance Arrangement can then be used for final assembly z. B. at a transmission manufacturer to be provided.

at A preferred constructive realization is the marking wheel with the bearing ring force, form, friction and / or cohesive connected. Particularly preferred is the marking wheel on the bearing ring pressed. By preferably only destructively detachable Connection between marking wheel and bearing ring is ensured that during installation of the rolling bearing no misalignment between Marking wheel and bearing ring can occur. It is also preferable that the marking wheel only indirectly via the bearing ring - ie serial and not parallel - connected to the shaft.

at An advantageous development of the invention is the marking wheel in an outwardly closed region of the transmission housing, in particular arranged in an oil sump area. In this position Damage or misalignment of the marking wheel almost completely excluded by external influences, so that even after a long period of use the marking wheel can cooperate reliably in a sensor arrangement. For example the marker wheel is adjacent in the transmission housing arranged to a gear arrangement.

alternative is the marking wheel in one with the interior of the transmission housing arranged open and / or communicatively connected area, which in special embodiments outside of Transmission housing is arranged. For example, that is Marking wheel arranged in an area which by an attachment, z. B. a flange, is formed on the gear housing.

at a first possible embodiment of the invention the marking wheel has a marking field which is cylindrical-shaped is formed and arranged concentrically and / or coaxially with the shaft is. By a sensor arrangement, which is an optional component the rolling bearing assembly forms, the marking field z. B. read in a radially oriented measuring direction.

at another possible embodiment of the invention the marking field extends in a flange shape in one Radial plane perpendicular to the shaft. An adapted sensor arrangement has z. B. a measuring direction in axial alignment, preferably parallel to the shaft. When again at their embodiments According to the invention, the marking field can also be cone-shaped be educated.

The Marking wheel is preferably radially on the inner ring formed extending that the marking field of the marking wheel in radial direction further than the outer ring of the rolling bearing extends. Due to the large diameter of the marking wheel is it possible a variety of markings on this to arrange. Preferably, the end face of the outer ring and the face of the marker wheel in the area of the marker field on a common radial plane and / or lie on two different ones Radial planes, less than 3 mm apart.

With the goal of a collision between the outer ring and the To avoid marking wheel, it is preferably proposed that the marking wheel angled several times in the area of the outer ring and / or curved. Preferably, the marking wheel in a longitudinal section through the axis of rotation of the shaft a rectangular, double angled area on, where the extension of a free area in the rectangle in the radial direction greater than the radial extent of the outer ring is trained.

The Marking wheel and in particular the marking field can have active and / or passive markings. Passive marks will be for example, through simple breakthroughs, holes, Indentations, indentations, formations, round holes, rectangular areas or the like is formed in the check box. active Markers are for example magnetized and / or magnetic Areas, Multipoles or the like provided.

In a further development of the invention the marker wheel has a first marker row and a second marker row, wherein the first and second marker rows differ by the number of markers and / or the resolution of the marker row.

These Further development is disclosed herein as a further invention. in the Frame of the invention, the further developed marking wheel also at other or any positions, especially at wheel bearings be used. Thus, a general rolling bearing with this marking wheel disclosed as an invention.

For example has a first series of marks - even high-resolution ones Mark series - more than 40, preferably more than 60 and in particular more than 80 markings on. The second Marking series - also low-resolution marking series to name but - has less than 20, preferably less than 10 marks on. By arranging two rows of marks it is possible to have two separate sensor arrays in the Rolling arrangement to accommodate, wherein the first sensor arrangement the high resolution marker row and the second sensor array detected the low resolution label series. The Signals of the high-resolution sensor arrangement become, for example for the control or synchronization of a transmission, the low-resolution sensor arrangement represents, for example Measurement signals for speedometer and / or tachograph ready.

at a preferred constructive realization of the invention has the marking wheel a cylinder jacket marking field on, wherein - starting from the attachment of the marking wheel on the bearing ring - initially a high-resolution Marking row, formed for example with magnetized areas is, and then a low-resolution mark series, For example, with mechanical punching connects.

One Another object of the invention relates to a transmission with the The feature of claim 10, wherein the transmission comprises a controller, characterized in that the transmission is a rolling bearing assembly according to one of the preceding claims or as it has just been has been described.

at a preferred constructive realization of the invention is the Transmission as an automated transmission, especially as a Claw gear, preferably formed without synchronization. The information about the speed and / or the direction of rotation, which are derived from the marking wheel, are from a Control device for synchronizing the switching operations used in the transmission.

Further Features, advantages and effects of the invention will become apparent the following description of preferred embodiments the invention. Show

1 a schematic longitudinal section through a transmission as a first embodiment of the invention;

2 the rolling bearing assembly in the 1 the transmission in an enlarged view;

3 a schematic three-dimensional representation of the pole wheel from the two previous representations;

4 a longitudinal section through a rolling bearing assembly as a second embodiment of the invention;

5 an alternative embodiment of the pole wheel for the embodiment in the 4 in a three-dimensional representation.

each other corresponding or equal parts are each corresponding to each other or the same reference numerals.

The 1 shows a schematic longitudinal section through a transmission 1 as a first embodiment of the invention.

The gear 1 has a transmission housing 2 in, in its interior 3 a plurality of shafts are meshed with each other, wherein from the illustration of the 1 only one output shaft 4 can be removed. The output shaft 4 is opposite the gearbox 2 via a rolling bearing 5 stored, which is with its outer ring 6 on the gearbox 2 and with his inner ring 7 on the output shaft 4 supports, with the inner ring 7 with the output shaft 4 is turned.

The gear 1 For example, is intended for installation in a truck or other vehicle, the output shaft 4 this serves to drive torque from the transmission 1 to transfer to a rear axle or a rear differential. For example, it is the transmission 1 to an automated transmission, in particular claw transmission, without particular mechanical synchronization and / or friction clutch.

As is clear from the 2 can be seen, which is a schematic enlargement of the transmission 1 in the 1 in the area of the rolling bearing 5 shows is on the inner ring 7 a pole wheel 8th placed, which with the inner ring 7 rotatably connected. The pole wheel 8th is formed like a disk and has a circumferential marking field in a radial edge region 9 on, which is flange-like in a radial plane perpendicular to the output shaft 4 extends, and in which a plurality of markings 10 as breakthroughs or holes in the form of ovals or rectangles is introduced. About a sensor 11 ( 1 ), which in the transmission housing 2 is set, the markers become 10 in the pole wheel 8th sampled, so through the sensor 11 Direction of rotation and / or rotational speed and / or rotational acceleration of the pole wheel 8th , the inner ring 7 and thus the output shaft 4 can be determined.

To connect the pole wheel 8th with the inner ring 7 has the pole wheel 8th a connection section 12 on. The connecting section 12 radially inside a molded attachment portion 13 which has a tubular shape, wherein the pole wheel 8th over the attachment section 13 on the inner ring 7 pressed on and optionally connected via other types of connection with this rotation. The connecting section 12 is up to the checkbox 9 Angled three times at right angles, so that between outer ring 6 and connecting section 12 a longitudinally rectangular space 14 results in collisions between outer ring 6 and pole wheel 8th to avoid or the axial position of the marking field 9 to lay down. The pole wheel 8th is on the inner ring 7 in the area of the large front side of the tapered rollers 15 placed. The inner ring 7 and the pole wheel 8th are each formed in one piece.

In operation, the pole wheel is running 8th inside the gearbox 2 For example, in an oil sump and is effectively protected in this way against damage or contamination from the outside.

The 3 shows the pole wheel 8th again in a three-dimensional representation obliquely from the side, wherein the attachment portion 13 which the free space 14 limited, again clearly visible. After the connection section 12 the checkbox closes 9 in which in this example 86 radially aligned openings 10 are introduced as markers.

The pole wheel 8th is preferably produced in a cost-effective production by forming. During assembly, first the pole wheel 8th on the inner ring 7 set so that these two parts together form a built-in unit and in particular are secured against adjustments. The pole wheel is preferred 8th placed so that the front of the outer ring 6 and the outer ring 6 facing surface of the marking field 9 to form a common escape.

The 4 shows a second embodiment of a rolling element arrangement according to the invention 16 in a gear not shown in detail. In contrast to the previous embodiment, the rolling bearing 5 formed as a ball bearing, wherein the outer ring 6 back to the gearbox 2 and the inner ring 7 on the output shaft 4 supported, so that during operation of the inner ring 7 together with the output shaft 4 rotates. Also in this embodiment is with the inner ring 7 a pole wheel 8th rotatably connected, which is located in an area with the interior 3 of the gearbox 2 open, in particular oil-permeable connected.

As another difference from the previous embodiment, the check box is 9 arranged on a cylinder jacket surface, which coaxial and / or concentric with the axis of rotation of the output shaft 4 is oriented. The sensor 11 has in the embodiment according to the 4 a measurement orientation in the radial direction, whereas the sensor 11 in the 1 was aligned with an axial direction of measurement. The next difference to the pole wheel 8th in the preceding figures, the pole wheel 8th in the 4 magnetic markings 17 on that into the pole wheel 8th were magnetized. However, it is also possible that, instead of the magnetized areas, openings are again used as in the preceding figures.

The 5 finally shows a three-dimensional representation of a pole wheel 8th , which is a first series of marks 18 and a second series of marks 19 having, wherein the first marker row 18 more than 80 markers and the second mark series 19 only 5 marks included. The first series of marks 18 is formed by magnetized areas, which are lined up in the circumferential direction. The second series of marks 19 is formed by a punching, generalized separation, where marginal areas are punched out and serve the remaining areas as markers.

The advantage of such a combined pole wheel 8th is that over a first sensor array, the first row of marks 18 high resolution can be read and a second sensor array, the second row of marks 19 low-resolution, for example, for a tachometer measurement, control measurement or tachograph measurement, can be sampled. It is also possible, by combined evaluation of the scanning signals of the two rows of marks 18 . 19 to obtain an increase in measurement accuracy or better information about the direction of rotation. Such a combined pole wheel 8th For example, in the transmission 1 of the 1 be used, being in a common or each other first offset a first row of marks 18 and then a second series of marks 19 can connect.

1

transmission

2

gearbox

3

inner space

4

output shaft

5

roller bearing

6

outer ring

7

inner ring

8th

flywheel

9

checkbox

10

marks

11

sensor

12

connecting portion

13

attachment section

14

free space

15

tapered rollers

16

rolling body

17

magnetic marks

18

first mark row

19

second mark row

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 8814620 U1 [0003]
• EP 701133 A1 [0004]

Claims (11)

Rolling bearing arrangement ( 16 ) with a marking wheel ( 8th ) and with a rolling bearing ( 5 ), the rolling bearing ( 5 ) a plurality of rolling elements and at least one bearing ring ( 7 ), wherein the bearing ring ( 7 ) is mounted rollingly on the rolling elements and wherein the marking wheel ( 8th ) as a separate component on the bearing ring ( 7 ) is mounted, characterized by a transmission housing ( 2 ) and a transmission shaft ( 4 ), where the transmission shaft ( 4 ) via the rolling bearing ( 5 ) relative to the transmission housing ( 2 ) is stored. Rolling bearing arrangement ( 16 ) according to claim 1, characterized in that the marking wheel ( 8th ) with the bearing ring ( 7 ) is positively, positively, frictionally and / or materially connected and / or via the bearing ring ( 7 ) with the gear shaft ( 4 ) connected is. Rolling bearing arrangement ( 16 ) according to one of the preceding claims 1 or 2, characterized in that the rolling bearing ( 5 ) is designed as a tapered roller bearing, cylindrical roller bearing or as a ball bearing. Rolling bearing arrangement ( 16 ) according to one of the preceding claims, characterized in that the transmission housing for a truck transmission ( 1 ) is trained. Rolling bearing arrangement ( 16 ) according to one of the preceding claims, characterized in that the marking wheel ( 8th ) in an oil sump area of the transmission housing ( 2 ) or in an oil sump area that communicates with the interior ( 3 ) of the transmission is oil-permeable connected, is arranged. Rolling bearing arrangement ( 16 ) according to one of the preceding claims, characterized in that the marking wheel ( 8th ) a check box ( 9 ), which is formed in a cylinder jacket or flange. Rolling bearing arrangement ( 16 ) according to one of the preceding claims, characterized in that the marking wheel ( 8th ) active and / or passive markings ( 10 ) having. Rolling bearing arrangement ( 16 ) according to one of the preceding claims, characterized in that the marking wheel ( 8th ) a first series of marks ( 18 ) and a second series of marks ( 19 ) which differ in resolution. Rolling bearing arrangement ( 16 ) according to claim 8, characterized in that the first marking row ( 18 ) and the second marking series ( 19 ) each circumferentially arranged markings 10 have, which in the axial and / or radial direction with respect to a common axis of rotation of the rolling bearing ( 5 ) are offset from each other. Transmission ( 1 ) comprising a control device, characterized in that the transmission comprises a rolling bearing arrangement according to one of the preceding claims or as just described, wherein the control device is interconnected for receiving signals which originate from the marking wheel ( 8th ) be derived. Transmission ( 1 ) according to claim 10, characterized in that the control device for controlling an automatic shifting of the transmission ( 1 ) is trained.