DE102018115554A1 - Rolling bearing and electric motor unit with rolling bearing - Google Patents

Abstract

The present invention relates to a roller bearing (01), comprising a first bearing ring (02; 03) and a second bearing ring (02; 03). The bearing rings (02, 03) are arranged coaxially to one another and rotatable about a common axis. Furthermore, the roller bearing (01) comprises a plurality of roller bodies (04) which are arranged between the bearing rings (02, 03). At least one bearing ring (02) consists of drawn metal and has a radially aligned flange (08). The invention also relates to an electric motor unit (17) which comprises a rotor and stator and a housing (19). The electric motor unit (17) further comprises a roller bearing (01) which corresponds to the roller bearing (01) according to the invention. The bearing ring (02), which has the flange (08), is arranged on the housing (19). The housing (19) and the flange (08) have a common bore (11) in which a connecting element (22) is introduced.

Description

The present invention relates to a rolling bearing. Furthermore, the present invention relates to an electric motor unit with a roller bearing.

Flange bearing housing units are known which consist of a housing, a bearing with at least one seal and at least one seal. The roller bearings or flange bearings are complex to assemble and therefore have high manufacturing costs.

From the EP 2 740 955 A1 a flanged bearing ring is known which has a tubular core and an outer axially aligned flange. Bores are formed in the flange which serve to receive screws or bolts, as a result of which a wheel can be arranged on the flanged bearing ring.

Starting from the prior art, the object of the present invention is to provide a rolling bearing which is light in weight and has low manufacturing costs and is easy to assemble. In particular, the rolling bearing should be applicable in small motors, such as electric motors.

The stated object is achieved by a roller bearing according to the attached claim 1 and by an electric motor unit according to the attached independent claim 3.

The rolling bearing according to the invention comprises a first bearing ring and a second bearing ring arranged coaxially thereto, which are rotatable with respect to one another. The two bearing rings have a common axis. Furthermore, the rolling bearing comprises a plurality of rolling elements which are arranged between the two bearing rings and on which the bearing rings can roll. At least one of the two bearing rings is made of drawn metal and has a radially aligned flange on one axial side.

The flange is preferably formed all the way around the bearing ring, so that it is disk-shaped. Both bearing rings are preferably made of drawn metal.

The metal from which the bearing rings are made is preferably steel. In particular, the bearing rings are made from drawn sheet steel.

The radially aligned flange is preferably composed of the two end pieces of the metal sheet, the two end pieces at least partially abutting one another. The two end pieces of the metal sheet preferably abut one another on their side faces. Starting from the bearing ring on which the flange is formed, the end pieces of the metal sheet are preferably completely in contact with one another. Starting from the bearing ring on which the flange is formed, the end pieces of the metal sheet are preferably adjacent to one another from half of their extent. A cavity is formed between the regions of the end pieces of the metal sheet which do not abut one another.

The flange is preferably at least higher than the cross-sectional height of the bearing ring on which the flange is formed. The flange preferably has twice the height of the bearing ring on which it is formed. The flange particularly preferably has four times the height of the bearing ring on which it is formed.

The flange preferably has at least one bore, in particular a through bore. The flange particularly preferably has a plurality of bores, the bores preferably being arranged on the flange at regularly spaced intervals. Connecting means can be inserted into the bores, so that the rolling bearing can be connected to a machine element.

One bearing ring is preferably designed as an outer bearing ring and the other bearing ring as an inner bearing ring. Both bearing rings preferably have a rolling element raceway on their facing lateral surfaces.

One of the bearing rings preferably has at least one circumferential groove on its lateral surface facing the other bearing ring. The groove is preferably semicircular.

In a first embodiment, the roller bearing also has at least one shield and / or one roller body cage. The shield can be referred to as a dust cover. The roller bearing particularly preferably has two dust protection disks. A securing ring can be inserted in the groove of the bearing ring to secure the dust protection disk. The locking ring is preferably made of a metal, an elastomer or plastic.

In a further embodiment, the roller bearing also has at least one seal and / or one roller body cage. The seal replaces the previously described label. The roller bearing particularly preferably has two seals. The groove preferably serves to accommodate the seal and the seal seat. To secure the seal, the locking ring can be inserted in the groove of the bearing ring.

The seal or the dust protection disk serve to retain greases in the rolling bearing, in particular in a rolling bearing space between the seal or the dust protection disk and the rolling bodies and between the bearing rings. Furthermore, the seal or the dust cover protects against dirt from the environment.

The rolling bearing can be used for floating bearings and / or non-floating bearings.

An advantage of the rolling bearing according to the invention is that it has a low weight, inter alia due to the construction of the bearing rings from drawn sheet metal. The low manufacturing costs of the rolling bearing are also an advantage. The manufacture of the rolling bearing and its installation, for example in an electric motor, are simple. The assembly is user-friendly. The roller bearing according to the invention provides a universal complete solution for installation in different types of electric motors, no additional components being required. The roller bearing can be installed in small motors.

The electric motor unit according to the invention comprises a rotor, a stator and a housing. Furthermore, the electric motor unit comprises a roller bearing, which corresponds to the roller bearing according to the invention described above with all embodiments. The bearing ring of the rolling bearing having the flange is arranged on the housing. The housing preferably has a bore which forms a common bore with the flange. A common connecting element is introduced through the bore of the flange and the bore of the housing, which connects the rolling bearing and the housing to one another.

Radial forces in the electric motor unit or in the roller bearing are derived from the roller bearing via the flange to the housing.

In one embodiment, the electric motor unit has a protective element which is designed as a roller bearing housing which at least partially surrounds the roller bearing. The protective element serves to protect the rolling bearing from contamination.

The roller bearing housing preferably has a straight section which is arranged on the flange of the bearing ring. Furthermore, the roller bearing housing has a bore in the area of the straight line. The bore of the roller bearing housing, the bore of the flange and the bore of the housing are arranged one behind the other, preferably in this order, so that the roller bearing housing, which partially surrounds the roller bearing, and the roller bearing are fastened to the housing of the electric motor by means of the connecting element.

The protective element or the roller bearing housing is preferably made of sheet metal.

An advantage of the electric motor unit with the roller bearing according to the invention is that complicated and expensive motor end caps and / or motor housings are no longer required, since a cheaper and simple unit is made available by the roller bearing with the protective element.

• 1 eine Schnittansicht einer ersten Ausführungsform eines erfindungsgemäßen Wälzlagers;
• 2 eine Draufsicht auf das in 1 gezeigte Wälzlager;
• 3 einen Ausschnitt einer Schnittansicht einer ersten Ausführungsform des Wälzlagers gemäß 1 im Einbauzustand;
• 4 einen Ausschnitt einer Schnittansicht einer zweiten Ausführungsform des Wälzlagers gemäß 1 im Einbauzustand;
• 5 eine Schnittansicht einer zweiten Ausführungsform des Wälzlagers;
• 6 eine Draufsicht auf das in 5 gezeigte Wälzlager;
• 7 eine Schnittansicht einer Ausführungsform des Wälzlagers gemäß 5 im Einbauzustand;
• 8 eine Schnittansicht einer Elektromotoreinheit mit dem Wälzlager gemäß 5.

Further details, advantages and further developments result from the following description of preferred embodiments of the invention with reference to the drawing. Show it:

• 1 a sectional view of a first embodiment of a rolling bearing according to the invention;
• 2 a top view of the in 1 Rolling bearings shown;
• 3 a section of a sectional view of a first embodiment of the rolling bearing according 1 in the installed state;
• 4 a section of a sectional view of a second embodiment of the rolling bearing according to 1 in the installed state;
• 5 a sectional view of a second embodiment of the rolling bearing;
• 6 a top view of the in 5 Rolling bearings shown;
• 7 a sectional view of an embodiment of the rolling bearing according to 5 in the installed state;
• 8th a sectional view of an electric motor unit with the rolling bearing according to 5 ,

1 shows a sectional view of a first embodiment of a rolling bearing according to the invention 01 , The roller bearing 01 includes an outer bearing ring 02 , a bottom bracket ring 03 as well as between the bearing rings 02 . 03 arranged rolling elements 04 , The bearing rings 02 . 03 are arranged coaxially and mutually rotatable about a common axis, being on the rolling elements 04 roll. The bearing rings 02 . 03 consist of drawn sheet steel and have rolling element raceways 06 on between which the rolling elements 04 lie. The rolling elements 04 are through a rolling element cage 07 held. The outer bearing ring has on an axially lying side surface 02 a flange 08 on. The flange 08 is made from the drawn steel sheet of the outer bearing ring 02 , especially from the end sections 09 of the steel sheet. The end sections 09 of Steel sheets lie against each other on their facing side surfaces. The flange 08 runs radially and has a through hole 11 on. So that's the flange 08 perpendicular to the raceway of the outer bearing ring 02 educated. Through the through hole 11 of the flange 08 , a connecting means (not shown) can be guided so that the rolling bearing 01 is attachable to a machine element. As a connecting means z. B. serve screws or rivets. Alternatively, the connection can also be made by welding or the like. Furthermore, the rolling bearing has 01 two dust covers 12 on. The dust screens 12 are at their radial end, which is on the outer bearing ring 02 comes to mind, angled. In the outer bearing ring 02 are two grooves on the inner circumference 13 educated. It is axially a groove 13 right and a groove 13 formed on the left on the inner circumference. The grooves 13 are all around the inner circumference of the outer bearing ring 02 educated. In the grooves 13 is a circlip 14 introduced the seat of the dust shields 12 secures the radial end, which is on the outer bearing ring 02 comes to a concern, a dust cover groove 16 have in the locking ring 14 comes to the concern. The bottom bracket ring 03 has a closed or almost closed rectangular shape with rounded corners, the ends of the drawn steel sheet abutting one another or having a gap with one another. The bottom bracket ring 03 can have an open shape, with an axially aligned ring surface with rolling element raceway 06 which the outer circumference of the bottom bracket 03 forms, and has radially aligned side surfaces. No further surface is formed opposite the lateral surface or ring surface. Due to the use of drawn sheet steel, the rolling bearing shows 01 light weight.

2 shows a top view of the in 1 Rolling bearings shown 01 , The roller bearing 01 has several through holes 11 on, which are evenly spaced circumferentially in the flange 08 of the outer bearing ring 02 are trained. Furthermore, is on the inner circumference of the rolling bearing 01 the bottom bracket ring 03 and the dust protection disc lying radially outside against it 12 shown.

3 shows a section of a sectional view of a first embodiment with the rolling bearing 01 according to 1 in the installed state. In the 3 The embodiment shown shows a non-floating bearing. The roller bearing 01 is installed on an electric motor and is therefore part of an electric motor unit 17 , The electric motor unit 17 includes in addition to the rolling bearing 01 , a wave 18 and a housing 19 , The roller bearing 01 lies with its outer bearing ring 02 on the housing 19 and with its bottom bracket ring 03 on the shaft 18 on. The roller bearing is radial between the housing 19 and the wave 18 arranged. The flange 08 the outer bearing ring 02 lies axially on the housing 19 at, the housing 19 a straight side surface that is parallel to the end portions 09 of the flange 08 lies. The housing 19 has a through hole 11 on that of the through hole 11 of the flange 08 follows, i.e. has the same diameter. Furthermore, the electric motor unit 17 a rolling bearing housing 21 on which the sealing or protection of the rolling bearing 01 serves against external influences. The roller bearing housing 21 has a radially aligned section that is parallel to the flange 08 lies. The roller bearing housing 21 lies on the flange 08 at least partially on and also has a through hole 11 that of the through hole 11 of the flange 08 follows. In the through hole 11 of the rolling bearing housing 21 , the flange 08 and the housing 19 is a connector in the form of a bolt 22 introduced the components 21 . 08 . 19 connects and secures in their position. The roller bearing housing 21 can also be called an end cap.

4 shows a section of a sectional view of a second embodiment of the rolling bearing 01 according to 1 in the installed state. In the 4 The embodiment shown acts as a floating bearing. First of all, the electric motor unit is the same 17 with the rolling bearing 01 the in 3 . shown Deviating from that in 3 shown design, the electric motor unit 17 the 4 two spring elements 23 to create a floating storage. Through the spring elements 23 an axial movement is made possible. The two spring elements 23 are formed by compression springs. The spring elements 23 are on the bolt 22 postponed. One of the two spring elements 23 is axial between the housing 19 and the flange 08 positioned. The other spring element 23 is between the head 24 of the bolt 22 and the rolling bearing housing 21 which on the flange 08 applied, positioned.

In 5 is a sectional view of a second embodiment of the rolling bearing 01 shown. First of all, it's like in 5 Rolling bearings shown 01 the in 1 . shown The in 5 shown outer bearing ring 02 is in contrast to the one in 1 shown design is not rectangular on its outer circumference. The outer circumference of the outer bearing ring 02 initially runs parallel to the axis or axially and then runs obliquely, with the transition into the flange 08 and a side surface of the flange 08 also increases diagonally. The tails 09 of the flange 08 are aligned radially and are parallel to each other. The second side face of the flange 08 runs straight radial.

6 shows a top view of the in 5 Rolling bearings shown 01 ,

In 7 is a sectional view of an embodiment of the rolling bearing 01 according to 5 shown in the installed state. The roller bearing 01 is part of the electric motor unit 17 , whereby it is installed as a non-floating bearing. The roller bearing 01 is axially on the housing 19 and radial on the shaft 18 arranged, which ensures easy assembly.

8th shows a sectional view of the electric motor unit 17 with the rolling bearing 01 according to 5 , The electric motor unit 17 has two roller bearings 01 , the first rolling bearing 26 the floating bearing and the second rolling bearing 27 the non-floating storage of the housing 19 towards the wave 18 serves. The electric motor unit 17 also includes an electric motor 28 , The roller bearings 01 are axially on the housing 19 and radial on the shaft 18 arranged. The roller bearings 01 can alternatively be radial between the housing 19 and the wave 18 be positioned as in 3 and 4 is shown.

LIST OF REFERENCE NUMBERS

01

roller bearing

02

Outer bearing ring

03

Inner bearing ring

04

rolling elements

05

-

06

rolling body

07

Rolling Element

08

flange

09

End section of the flange 08

10

-

11

Through Hole

12

Dust cover

13

groove

14

circlip

15

-

16

Staubschutzscheibennut

17

Electric motor unit

18

wave

19

casing

20

-

21

Rolling housing

22

bolt

23

spring element

24

bolt head

25

-

26

first rolling bearing

27

second rolling bearing

28

electric motor

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included 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 2740955 A1 [0003]

Claims (4)

Rolling bearings (01) comprising a first bearing ring (02; 03) and a second bearing ring (02; 03), which are arranged coaxially to one another and can be rotated about a common axis, as well as a plurality of rolling elements (04) which are arranged between the bearing rings (02, 03 ) are arranged, characterized in that at least one bearing ring (02) consists of drawn metal and has a radially aligned flange (08). Rolling bearing (01) after Claim 1 , characterized in that the flange (08) has a continuous bore (11) through which a connecting element (22) can be guided for fastening the rolling bearing (01) to a machine element (19). Electric motor unit (17) comprising a rotor, a stator, a housing (19) and a roller bearing (01) according to one of the Claims 1 or 2 characterized in that a bearing ring (02) of the rolling bearing (01), which has a flange (08), is attached to the housing (19), the housing (19) and the flange (08) having a common bore (11 ), in which a connecting element (22) is introduced. Electric motor unit (17) after Claim 3 , characterized in that the electric motor unit (17) further comprises a protective element (21) which at least partially surrounds the rolling bearing (01).

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