DE102018208354A1 - Balancing disk for a rotating component and manufacturing method - Google Patents

Abstract

The invention relates to a balancing disk (10) for a rotatable component (11). The object of making such a balancing disk more cost-effective is achieved in that the balancing disk (10) has a base body (12) having two ends (121, 122 The invention also relates to a method for producing a balancing disk (10) for a rotatable component (11). The object of making such a method more cost-effective is achieved by 20) is bent to a base body (12) • the base body (12) has two ends (121, 122) and substantially the shape of a circular ring sector.

Description

The invention relates to a balancing disk for a rotating or rotatable component, in particular for an outer disk carrier or for a rotor carrier, and to a method for producing such a balancing disk.

Usually, rotatable components which rotate rapidly during operation, as is the case, for example, in the rotor of an electric motor or the outer disk carrier of a multi-plate clutch must be balanced. This can be done by attaching small balancing elements, also referred to as "positive balancing", or by removing or removing material, also referred to as "negative balancing".

DE 10 2009 054 103 A1 describes a rotor of an electric motor for driving a motor vehicle. The rotor has at both axial ends of the Magentanordnung each a balancing ring. During balancing, locations on the balancing rings are determined where material can be removed from the balancing rings by drilling. Here, not only the location of any holes, but also their number and / or size is determined. In this known rotor each balancing ring is in one piece and has the shape of a circular ring.

DE 10 2015 203 012 A1 describes a rotor for an electric machine. The rotor has a rotor segment, which has a disk set with laminated laminations stacked one above the other in the longitudinal direction of extension of the rotor, and also a balancing disk on each end face of the rotor. In this known rotor each balancing disk is integrally formed and has the shape of a circular ring.

Methods are known in the prior art, wherein the balancing is realized by targeted removal of material along the circumference of a rotatable, in particular fast-rotating component, for example a rotor of an electric machine or find metal balancing discs use and then at certain points or in certain areas in particular mechanical removal of material by drilling, grinding, milling or the like realize a higher density. The balancing discs are in particular punched or milled from a metal plate. In this stamping and milling much material is lost as waste or waste.

The invention is therefore based on the object to make a balancing disk for a rotating or rotatable component and a method for producing a balancing disk for a rotating or rotatable component cheaper.

The object underlying the invention is achieved by a balance disk for a rotating or rotatable component and a method for producing a balance disk for a rotating or rotatable component by the features of the independent claims 1 and 5, respectively. Advantageous embodiments of the invention are described in the dependent claims.

• • einem Grundkörper, der zwei Enden und im Wesentlichen die Form eines Kreisringsektors hat.

The invention proposes according to a first aspect of a balance disc for a rotating or rotatable member, with

• A base body having two ends and substantially the shape of a circular ring sector.

The balancing disk according to the invention enables an effective and cost-effective production, for example by the method according to the invention.

The main body of the balancing disk according to the invention has the shape of a circular ring sector, so to speak an "open" circular ring, and has two ends, whereas the DE 10 2009 054 103 A1 . DE 10 2015 203 012 A1 and DE 10 2015 214 818 A1 known balancing disks each have the shape of a circular ring which is closed in itself and has no end.

Preferably, the main body is in one piece or monolithic.

The material of the body can be chosen as desired and contain, for example, at least one of the following materials: metal, steel, lead, zinc, tin, copper, tungsten.

The component may be formed as desired in any way, for example, such that it is designed as a rotor of an electric machine or an electric motor or a generator or as an outer disk carrier of a multi-plate clutch.

In one embodiment of the balancing disk, it is specified that the ends are connected to one another and / or at least one of the ends is connected to the component.

The connection of the ends with each other prevents the base body, when it rotates together with the component, can open or open due to the centrifugal force acting on it. In addition, by this connection, the base body in the radial direction more resilient, so that it can be joined by an interference fit on an outer peripheral surface of the component.

The connection of at least one of the ends with the component serves to prevent rotation between the balancing disk and the component.

Each of these connections can be made or be made as desired in any way, for example by positive locking and / or by adhesion and / or by material bond and / or by welding and / or by resistance welding and / or by capacitor discharge welding and / or laser welding and / or by spot welding and / or by soldering and / or by riveting and / or by screwing.

In a preferred embodiment of the balancing disk is specified that the base body has a recess for a dowel pin, which is opposite to the ends of the base body.

Preferably, this dowel pin engages when the balance disk is properly attached to the component in this recess and in a corresponding recess in the component and then serves to prevent rotation between the balancing disk and the component.

Each of these recesses may be formed as desired in any manner, such as a hole or groove or notch or slot.

In an embodiment of the balancing disk, it is specified that the base body has a cross section that is square or rectangular.

However, the cross-section can also be shaped as desired in any other way and is preferably adapted to the respective component to which the base body is to be attached.

• • ein Draht zu einem Grundkörper gebogen wird;
• • der Grundkörper zwei Enden und im Wesentlichen die Form eines Kreisringsektors hat.

The invention proposes, according to a second aspect, a method for producing a balance disk for a rotating or rotatable component, wherein

• • a wire is bent to a base body;
• • The main body has two ends and substantially the shape of a circular ring sector.

The method according to the invention avoids the scrap or waste produced during the known stamping and milling and thus enables an effective and cost-effective production of balancing disks and in particular of the balancing disks according to the invention.

The wire can be made or be made as desired in any manner, for example using at least one of the following: metal, steel, lead, zinc, tin, copper, tungsten.

In one embodiment of the method, it is specified that after bending the ends are joined together and / or after bending of at least one of the ends is connected to the component.

The joining of the ends with each other prevents the base body, when it rotates together with the component, from being able to open or open due to the centrifugal force acting on it. In addition, by this connection, the base body in the radial direction more resilient, so that it can be joined by an interference fit on an outer peripheral surface of the component.

The connection of at least one of the ends to the component serves to prevent rotation between the balancing disk and the component.

Each of these connecting processes can be carried out as required in any manner, for example by positive engagement and / or by adhesion and / or by material bond and / or by welding and / or by resistance welding and / or by capacitor discharge welding and / or laser welding and / or by spot welding and / or by soldering and / or by riveting and / or by screwing.

In one embodiment of the method it is specified that a recess for a dowel pin is placed in the wire, which is located centrally between the ends of the wire, or in the base body a recess for a dowel pin, which is opposite to the ends of the base body.

Preferably, this dowel pin is used when attaching the balancing disk to the component in this recess and in a corresponding recess in the component and then serves to prevent rotation between balancing disk and component.

Each of these recesses may be formed as desired in any manner, such as a hole or groove or notch or slot.

In one embodiment of the method, it is specified that the wire has a cross-section that is circular or semicircular or elliptical or oval or D-shaped or quadrangular or triangular or square or rectangular or trapezoidal.

• • der Draht einen Querschnitt hat, der die Form eines gleichschenkligen Trapezes hat;
• • das Trapez eine erste Grundseite und eine zweite Grundseite hat, die kürzer als die erste Grundseite ist;
• • das Biegen derart erfolgt, dass der Draht derart ausgerichtet wird oder ist, dass die erste Grundseite in Bezug auf die Biegeachse radial außen liegt und / oder von der Biegeachse weg weist und / oder die zweite Grundseite in Bezug auf die Biegeachse radial innen liegt und / oder zu der Biegeachse hin weist.

In a preferred embodiment of the method it is specified that

• The wire has a cross-section which is in the shape of an isosceles trapezium;
• The trapezoid has a first base side and a second base side that is shorter than the first base side;
• Bending is performed such that the wire is oriented such that the first base side is radially outward relative to the bending axis and / or facing away from the bending axis and / or the second base side is radially inward relative to the bending axis; / or points to the bending axis.

During bending, the material in the radially outer regions of the wire is stretched in the circumferential direction and compressed in the radially inner regions of the wire in the circumferential direction, so that the cross section deformed such that the first base side becomes shorter and the second base side becomes longer. Thus, the initially trapezoidal cross-section by bending approaches a rectangle or square.

In one embodiment of the method, it is specified that the trapezoid is formed such that the wire after bending or the base body has a cross section which is square or rectangular.

• 1 eine erste Ausführungsform der erfindungsgemäßen Wuchtscheibe;
• 2 eine erste Ausführungsform eines drehbaren Bauteils, an dem die Wuchtscheibe der 1 angebracht ist;
• 3 eine zweite Ausführungsform der erfindungsgemäßen Wuchtscheibe;
• 4 eine zweite Ausführungsform eines drehbaren Bauteils, an dem die Wuchtscheibe der 3 angebracht ist;
• 5 eine dritte Ausführungsform der erfindungsgemäßen Wuchtscheibe;
• 6 eine bevorzugte Ausführungsform eines Drahtes für die erfindungsgemäße Herstellung der Wuchtscheibe der 1 und 3.

There are now a variety of ways to design and further develop the balancing disc according to the invention or its production method in an advantageous manner. For this purpose, reference may first be made to the patent claims 1 and 5 subordinate claims. In the following, a preferred embodiment of the invention with reference to the drawings and the associated description may be explained in more detail. In the drawing shows:

• 1 a first embodiment of the balancing disk according to the invention;
• 2 a first embodiment of a rotatable member to which the balancing wheel of 1 is appropriate;
• 3 a second embodiment of the balance disc according to the invention;
• 4 a second embodiment of a rotatable member on which the balancing disk of 3 is appropriate;
• 5 a third embodiment of the balancing disk according to the invention;
• 6 a preferred embodiment of a wire for the inventive production of the balance disc of 1 and 3 ,

In 1 and 2 is a first embodiment of a balance disk 10 for a rotatable component 11 shown schematically.

In 2 is additionally a first embodiment of a component 11 shown schematically, on which this balancing disc 10 to be attached and exemplified as an outer disc carrier 11 a multi-plate clutch not shown is formed and a cylindrical outer peripheral surface 111 Has.

The balancing wheel 10 has a basic body 12 on, which has the shape of a circular sector and therefore two free ends 121 . 122 Has. The free ends 121 . 122 lie with a small distance opposite each other or abut flush.

In the preferred embodiment of the balancing disk 10 are the free ends 121 . 122 in particular by a weld 13 connected with each other. The main body 12 has a rectangular cross-section, a cylindrical outer peripheral surface 123 and a cylindrical inner peripheral surface 124 and has in the inner peripheral surface 124 a depression 14 for a dowel pin 15 on top of the ends 121 . 122 opposite. The depression 14 is a groove or notch parallel to the longitudinal axis of the body 12 runs.

The balancing wheel 10 was so pressed onto the peripheral surface with a press fit 111 pushed that depression 14 with a corresponding recess 16 in the peripheral area 111 flees. The depression 16 is a through hole that is radial with respect to the longitudinal axis of the component 11 runs, and the dowel pin 15 was after pushing the balancing wheel 10 so far into the depression 16 pushed until its radially outer end in the recess 14 and his rest in the well 16 sitting.

In 2 is an enlarged section of the area around the ends at the top right in front view 121 . 122 and the weld 13 around and below in front view an enlarged section of the area around the recesses 14 . 16 and the dowel pin 15 presented around.

In 3 and 4 is a second embodiment of the balancing disk 10 shown schematically. This embodiment is similar to the first embodiment, so that below all the differences are explained in more detail below. In 4 is additionally a second embodiment of the component 11 shown schematically, on which this balancing disc 10 should be attached. This embodiment is similar to the first embodiment, so that below all the differences are explained in more detail below. In this embodiment of the balancing disk 10 are the free ends 121 . 122 not connected, so that the weld 13 the first embodiment is omitted. In addition, the depression is eliminated 14 in the inner peripheral surface 124 , and also the dowel pin 15 and the depression 16 in the peripheral area 111 omitted.

Instead, that's the end 122 through a weld 17 with a radially outwardly projecting collar of the component 11 connected. The end 121 is also connected by a weld, not shown, with this collar.

In 4 On the right side in sectioned side view is an enlarged section of the area around the end 122 and the weld 17 presented around.

In 5 is a third embodiment of the balancing wheel 10 shown schematically. This embodiment is similar to the first embodiment, so that below all the differences are explained in more detail below. In 5 is additionally the component 11 according to the first embodiment shown schematically on which this balancing disc 10 should be attached.

In this embodiment, the balancing wheel 10 are the free ends 121 . 122 not connected by welding, but by positive engagement with each other, so that the weld 13 the first embodiment is omitted. The form fit is made by means of U-shaped hooks 18 . 19 achieved in one piece or monolithic with the main body 12 are formed and engage each other such that the ends 121 . 122 can not be separated and pulled apart in the circumferential direction. The hooks 18 . 19 are produced in particular by punching.

The hook 18 runs from the end 121 first in a first circumferential direction to the end 122 then initially deflects radially inwards and finally in the opposite, second circumferential direction and terminates at a distance from the end 121 , The hook 19 runs from the end 122 first in the second circumferential direction to the end 122 then initially deflects radially outward and finally in the first circumferential direction and ends at a distance from the end 122 , The free leg of the hook 18 can through the gap between the free leg of the hook 19 and the end 122 moved radially inward, and the free leg of the hook 19 can through the gap between the free leg of the hook 18 and the end 121 be moved radially outward. These movements can be the hook 18 . 19 be hooked into one another such that the free leg of the hook 18 at the inner curve of the hook 19 and / or the free leg of the hook 19 at the inner curve of the hook 18 is applied. This ensures that upon rotation of the balancing wheel 10 the ends 121 . 122 can be solved by the centrifugal force neither in the circumferential direction nor in the radial direction from each other and pulled apart.

In the properly hooked state remains between the outer rounding of the hook 19 and the end 121 a gap that the deepening 16 forms.

In 6 is a preferred embodiment of a wire 20 for the inventive production of the balancing disks of 1 to 5 ,

In this embodiment, the wire is made 20 made of steel and has a cross-section that has the shape of an isosceles trapezium. The trapeze has a first base page 21 and a second base page 22 that's shorter than the first base page 21 is.

Hereinafter, a first embodiment of the method according to the invention for producing a balancing disk will be described, with which in particular the balancing disk 10 of the 1 and 2 can be produced.

In a first step, the in 6 lower surface 124 of the wire 20 that's the second base page 22 corresponds to the depression 16 for the dowel pin 15 inserted in such a way that it is centered between the ends 121 . 122 of the wire 20 lies.

In a second step, the wire becomes 20 to the main body 12 bent. This is the wire 20 bent around a bending axis, not shown, in 6 below the wire 20 and in particular at right angles to this runs. Therefore, the wire 20 aligned so that the first base page 21 radially outward with respect to the bending axis and pointing away from the bending axis and the second base side 22 radially inward with respect to the bending axis and facing the bending axis. Thus, on the one hand, it is easy to see that the in 6 upper surface 123 of the wire 20 that's the first base page 21 corresponds to the outer peripheral surface 123 of the basic body 12 and the in 6 lower surface 124 of the wire 20 the inner peripheral surface 124 of the basic body 12 will form. On the other hand, it is easy to see that in 6 right end 121 of the wire 20 the end 121 of the basic body 12 and that in 6 left end 122 of the wire 20 the end 122 of the basic body 12 will form.

The trapezoid is formed and the length of the wire 20 is chosen such that the wire 20 after bending and thus the body 12 has a cross section that is rectangular, as in 1 shown.

In a third step, the ends become 121 . 122 welded together. This creates the weld 13 , The balancing wheel 10 of the 1 and 2 is finished.

Hereinafter, a second embodiment of the method according to the invention will be described, with which the balancing disk 10 of the 1 and 2 can be produced. This embodiment is similar to the first embodiment, so that below all the differences are explained in more detail below.

In this embodiment, in a first step, the wire 20 to the main body 12 bent. This is analogous to the second step of the first embodiment.

In a second step is in the inner peripheral surface 124 of the basic body 12 the depression 16 for the dowel pin 15 inserted so that they are the ends 121 . 122 of the basic body 12 opposite. This is analogous to the first step of the first embodiment.

A third step corresponds to the third step of the first embodiment. The balancing wheel 10 of the 1 and 2 is finished.

Hereinafter, a third embodiment of the method according to the invention will be described, with which the balancing disk 10 of the 1 and 2 can be produced. This embodiment is similar to the second embodiment, so that below all the differences are explained in more detail below.

In this embodiment, a first step corresponds to the first step of the second embodiment, a second step corresponds to the third step of the second embodiment, and a third step corresponds to the second step of the first embodiment.

Hereinafter, a fourth embodiment of the method according to the invention will be described, with which the balancing disk 10 of the 3 and 4 can be produced. This embodiment is similar to the second embodiment, so that below all the differences are explained in more detail below.

In this embodiment, a first step corresponds to the first step of the second embodiment.

In a second step, the main body 12 on the outer peripheral surface 111 of the component 11 pushed and become the ends 121 . 122 with the collar of the component 11 welded. This creates the weld 17 at the end 122 and the weld, not shown, at the end 121 , The balancing wheel 10 of the 3 and 4 is finished.

Hereinafter, a fifth embodiment of the method according to the invention will be described, with which the balancing disk 10 of the 5 can be produced. This embodiment is similar to the second embodiment, so that below all the differences are explained in more detail below.

In this embodiment, a first step corresponds to the first step of the second embodiment.

In a second step, the hooks 18 . 19 by punching the body 12 produced.

In a third step, the free leg of the hook 18 through the gap between the free leg of the hook 19 and the end 122 moved radially inward, and is the free leg of the hook 19 through the gap between the free leg of the hook 18 and the end 121 moved radially outward. Then the hooks 18 . 19 pulled apart in the circumferential direction, so that the free leg of the hook 18 at the inner curve of the hook 19 and / or the free leg of the hook 19 at the inner curve of the hook 18 is applied. The balancing wheel 10 of the 5 is finished.

Hereinafter, a sixth embodiment of the method according to the invention will be described, with which the balancing disk 10 of the 5 can be produced. This embodiment is similar to the fifth embodiment, so that below all the differences are explained in detail.

In this embodiment, in a first step, the hooks 18 . 19 by punching the wire 20 produced. This is analogous to the second step of the fifth embodiment.

A second step corresponds to the first step of the fifth embodiment, and a third step corresponds to the second step of the fifth embodiment. The balancing wheel 10 of the 5 is finished.

LIST OF REFERENCE NUMBERS

10

balancing disk

11

rotatable component, outer disc carrier

111

outer peripheral surface of 11

12

body

121/122

first / second end of 12

123/124

outer / inner peripheral surface of 12

13

Weld between 121 and 122

14

deepening

15

dowel

16

deepening

17

Weld between 122 and 11

18

Hook on 121

19

Hook on 122

20

wire

21

first base of a trapezoid

22

second base of a trapezoid

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely 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.

Cited patent literature

• DE 102009054103 A1 [0003, 0010]
• DE 102015203012 A1 [0004, 0010]
• DE 102015214818 A1 [0010]

Claims (10)

Balancing disk (10) for a rotatable component, in particular for an outer disk carrier or for a rotor carrier, characterized by • a base body (12) having two ends (121, 122) and substantially the shape of a circular ring sector. Balancing disk (10) according to the preceding claim, characterized in that • the ends (121, 122) are connected to one another and / or at least one of the ends (121, 122) is connected to the component (11). Balancing disk (10) according to one of the preceding claims, characterized in that • the base body (12) has a recess (14) for a dowel pin (15), in particular a recess (14) which lies opposite the ends (121, 122). Balancing disc (10) according to one of the preceding claims, characterized in that • the base body (12) has a cross section which is square or rectangular, in particular the base body (12) is made of a wire. Method for producing a balancing disk (10) for a rotatable component, in particular for producing a balancing disk (10) according to the Claims 1 to 4 , characterized in that • a wire (20) is bent to a base body (12); • The base body (12) has two ends (121, 122) and substantially the shape of a circular ring sector. Method according to the preceding claim, characterized in that • after bending, the ends (121, 122) are connected together and / or at least one of the ends (121, 122) is connected to the component (11). Method according to one of the preceding claims, characterized in that • in the wire (20) a recess (14) for a dowel pin (15) is introduced, which is located centrally between the ends (121, 122) of the wire (20), or in the base body (12) a recess (14) for a dowel pin (15) is introduced, which faces the ends (121, 122) of the base body (12). Method according to one of the preceding claims, characterized in that • the wire (20) has a cross-section which is circular or semicircular or elliptical or oval or D-shaped or quadrangular or triangular or square or rectangular or trapezoidal. Method according to one of the preceding claims, characterized in that • the wire (20) has a cross-section which has the shape of an isosceles trapezium; The trapezoid has a first base side (21) and a second base side (22) which is shorter than the first base side (21); Bending is performed such that the wire (20) is oriented such that the first base side (21) lies radially outward with respect to the bending axis and / or points away from the bending axis and / or the second base side (22) is radially inward with respect to the bending axis and / or facing the bending axis. Method according to the preceding claim, characterized in that • the trapezoid is formed such that the wire (20) after bending or the base body (12) has a cross-section which is square or rectangular.

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