DE102017129585A1 - Circlip for securing a component in a bore and assembly with such a retaining ring - Google Patents

Abstract

The invention relates to a retaining ring (1) for securing a component in a bore, with a ring-segment-shaped base body (2) having two ring segment ends (5, 6), wherein in the region of each ring segment end (5, 6) in the Base body (2) is arranged a recess for inserting one end of a circlip pliers, wherein the recesses are formed as indentations (7, 8) on an inner edge (3) of the ring-segment-shaped base body (2). Furthermore, the invention relates to an assembly with such a retaining ring.

Description

The invention relates to a locking ring for, in particular axial, securing a component in a bore, with a ring-segment-shaped base body having two ring segment ends, wherein in the region of each ring segment end an engagement opening for inserting an end of a circlip pliers is arranged. Furthermore, the invention relates to an assembly having a housing, a planetary gear with a ring gear and a locking ring for securing the ring gear on the housing.

For securing components, such as bolts or ring gears of planetary gears, in a bore typically circlips are used, which are also referred to as grooved rings.

These retaining rings generally have a substantially annular segment-shaped body with two ring segment ends, which are separated by a gap. In the region of the ring segment ends, inwardly directed sections are typically provided in the manner of tabs, each having a recess. In these recesses or "eyes" the ends of a circlip pliers can be introduced to move the ring segment ends towards each other during the disassembly of the locking ring from a bore. Such circlips are described for example in the standard DIN 472.

From the US 4,756,212 is another variant of a locking ring without recesses known. This circlip has at its ring segment ends also inwardly facing portions whose contour provides a contact surface for a circlip pliers.

In the known locking rings for securing components in holes, it has proven to be disadvantageous that these require a certain amount of space due to the inwardly facing portions of the ring segment ends. These circlips are therefore not usable in such installation situations in which between the inner edge of the bore and the component is a particularly small annular gap for introducing the circlip pliers available.

Against this background, the task is to enable the securing of components in holes with circlips even if only a small annular gap for inserting a safety tongs is available on the inner edge of the bore.

To solve the problem, a retaining ring for securing a component is proposed in a bore, with a ring-segment-shaped base body having two ring segment ends, wherein in the region of each ring segment end in the base body a recess for inserting an end of a circlip pliers is arranged the recesses are formed as indentations on an inner edge of the ring-segment-shaped main body.

Since the recesses in the areas of the ring segment ends are formed in the inventive circlip as indentations on an inner edge of the ring-segment-shaped base body, the respective end of the circlip pliers can be introduced from the interior of the locking ring into the recess on the inner edge. It is therefore possible to bring the circlip pliers even in the arrangement of the locking ring in difficult to access space in engagement with the recesses of the locking ring. On the retaining ring must be provided in the region of the ring segment ends no inwardly projecting portion. The retaining ring is therefore suitable for use in particularly tight spaces, in particular narrow annular gaps between the component and the bore.

According to an advantageous embodiment, the recesses are arranged on the inner edge such that the course of the inner edge of the ring-segment-shaped main body on both sides of the indentation describes a common curved line. In this respect, the curvature of the inner edge continues on a first side of the indentation on the opposite, second side of the indentation. This makes it possible that one end of a locking pliers can be introduced into the recess without a protrusion of the body is required to the inside. Preferably, the course of the inner edge of the ring-segment-shaped main body on both sides of the indentation describes a common circular segment-shaped curved line.

It has proven to be advantageous if the indentations have an undercut on each side facing the ring segment end. The end of the circlip pliers can, in particular for disassembly of the securing ring, be introduced into the indentation in such a way that it is arranged in the region of the undercut. By the undercut, the risk of undesirable slipping of the end of the circlip pliers from the recess can be reduced.

In this context, it is preferable if the undercut has a circular contour having. A circular contour has been found to be particularly suitable for introducing such ends of circlip pliers having a circular cross-section. The circular contour can prevent slippage of a circular end of the circlip pliers particularly well.

According to a structurally advantageous embodiment, the undercut has a circular contour with an undercut radius, wherein the ratio of the undercut radius to the width of the main body in the range of 0.2 to 0.5, preferably in the range of 0.22 to 0th , 3, more preferably in the range of 0.25 to 0.27. The width of the ring-segment-shaped base body is considered to be the extension of the base body in a direction which runs perpendicular to the inner edge and perpendicular to the outer edge of the base body. In this respect, the width of the main body is the extent in the radial direction of the securing ring.

It is advantageous if the recesses are each formed without undercut on a side facing away from the ring segment end, i. that there is no undercut on this side of the indentation. In this way it can be prevented that the ends of a splayed circlip pliers get caught or tangled in the indentations.

A structurally preferred embodiment provides that the indentations have a circular contour on a side facing away from the ring segment end. It is advantageous if the indentations on a side facing away from the ring segment end have a circular contour with a recessed radius, wherein the ratio of the indentation radius to the width of the base body in the range of 0.1 to 0.6, preferably in Range of 0.2 to 0.4, more preferably in the range of 0.25 to 0.35.

According to an advantageous embodiment, it is provided that the side of the indentation facing the ring segment end has a first distance from the ring segment end, the ratio of the first distance to the width of the main body being in the range from 0.4 to 0.8 in the range of 0.5 to 0.7, more preferably in the range of 0.55 to 0.65.

Preferably, the side facing away from the ring segment end of the indentation has a second distance from the ring segment end, wherein the ratio of the second distance to the width of the base body in the range of 1.5 to 2.0, preferably in the range of 1.6 to 1.8, more preferably in the range of 1.65 to 1.75.

To solve the object mentioned above, an assembly is further proposed, comprising a housing, a planetary gear with a ring gear and a locking ring for securing the ring gear to the housing, wherein the locking ring is formed as described above.

In the assembly, the same advantages can be achieved as they have already been described in connection with the locking ring according to the invention. In this case, the advantageous features and configurations described in connection with the retaining ring can preferably be used alternatively or in combination.

• 1 ein Ausführungsbeispiel eines erfindungsgemäßen Sicherungsrings in einer Seitenansicht;
• 2 ein Gehäuse mit einer Bohrung und einer Bohrungsnut zur Aufnahme eines Sicherungsrings;
• 3 eine Schnittdarstellung eines Bereichs eines Gehäuses mit einer Bohrungsnut, in der ein Sicherungsring gemäß einem Ausführungsbeispiel der Erfindung angeordnet ist; und
• 4 eine Seitenansicht des Bereichs eines Ringsegment-Endes eines Sicherungsrings gemäß einem Ausführungsbeispiel der Erfindung.

Further details and advantages of the invention will be explained below with reference to the embodiment shown in the drawings. Hereby shows:

• 1 an embodiment of a securing ring according to the invention in a side view;
• 2 a housing having a bore and a bore groove for receiving a locking ring;
• 3 a sectional view of a portion of a housing having a bore groove in which a locking ring is arranged according to an embodiment of the invention; and
• 4 a side view of the portion of a ring segment end of a locking ring according to an embodiment of the invention.

In the 1 is an embodiment of a locking ring 1 shown for securing a component in a bore, which is designed according to the invention. The circlip 1 has a ring-segment-shaped body 2 on. That means the main body 2 not in the form of a closed ring, but as an open ring with a gap 10 is trained.

The main body 2 has an inner edge 3 on, which is substantially arcuate, in particular circular arc-shaped. The inner edge 3 forms the inner contour of the locking ring 1 , The outer contour of the locking ring 1 is through an outer edge 4 of the basic body 2 educated. The main body 2 is preferred as a flat, planar body 2 educated. The width of the body, so the extension of the body 2 in a direction perpendicular to the inner edge 3 and perpendicular to the outer edge 4 runs, is greater than the depth of the body, so the extension of the body 2 in the axial direction of a bore into which it can be inserted.

As the illustration in 1 can be further removed, has the ring-segment-shaped body 2 two ring segment ends 5 . 6 on, between which the gap 10 is arranged. In the area of the ring segment ends 5 . 6 is in the body 2 in each case one, in particular exactly one, recess for introducing one end of a circlip pliers arranged. To secure components in holes with the circlip 1 also allow, if at the inner edge of the bore only a small annular gap for introducing a backup pliers available are at the retaining ring 1 taken special measures. So are the recesses in the body 2 as indentations 7 . 8th at the inner edge 3 of the ring-segment-shaped base body 2 educated. This allows the respective end of the circlip pliers from the interior of the circlip 1 into the indentation 7 . 8th at the inner edge 3 be introduced. It is therefore possible, the circlip pliers also in the arrangement of the locking ring 1 in difficult to access spaces in engagement with the indentations 7 . 8th of the circlip 1 bring to.

The representation in 2 shows an example of a housing 100 an assembly, such as an assembly with a planetary gear that includes a ring gear, which is fixed relative to the housing. To secure the ring gear to the housing 100 For example, a locking ring according to an embodiment of the invention may be used.

The housing 100 has a cylindrical bore 101 on. At the inner contour of the bore 101 is a bore groove 102 arranged. The width of the bore groove 102 is on the depth of the circlip 1 tuned so that this in the bore groove 102 can be introduced to secure the ring gear of the planetary gear.

The 3 shows a sectional view of a portion of a housing 100 with one in a bore groove 102 introduced circlip 1 according to an embodiment of the invention.

It can be seen that the indentations 7 . 8th so on the inner edge 3 are arranged so that the course of the inner edge 3 of the ring-segment-shaped base body 2 on both sides of the indentation 7 . 8th describes a common curved line, in particular a common circular segment-shaped curved line. In this respect, the indentations in the manner of franking in the curved inner edge 3 designed.

The indentations 7 . 8th are identically designed, with the indentations 7 . 8th mirror-symmetric with respect to a through the gap 10 extending symmetry axis S are arranged.

In 4 is a side view of the area of a ring segment end 6 a circlip 1 shown according to an embodiment of the invention. Preference is given to the retaining ring 1 the areas of both ring segment ends 6 . 7 Although identical, so that the following description for both ring segment ends 6 . 7 is true.

The width X4 of the basic body 2 , ie the extension of the body 2 in a direction perpendicular to the inner edge 3 and perpendicular to the outer edge 4 of the basic body 2 runs, for example, in the range of 1 to 10 mm, preferably in the range of 3 to 7 mm, particularly preferably in the range of 4 to 6 mm.

The indentation 8th at the inner edge 3 is at a certain distance from the ring segment end 6 arranged. As it has been found advantageous if the ring segment end 6 facing side of the indentation 8th a first distance X1 from the ring segment end 6 wherein the ratio of the first distance X1 to the width X4 of the basic body 3 in the range of 0.4 to 0.8, preferably in the range of 0.5 to 0.7, particularly preferably in the range of 0.55 to 0.65. At the end of the ring segment 6 facing side of the indentation 8th is a first radius R2 intended.

The ring segment end 6 opposite side of the indentation 8th has a second distance X2 from the ring segment end 6 on, where the ratio of the second distance X2 to the width X4 of the basic body 2 in the range of 1.5 to 2.0, preferably in the range of 1.6 to 1.8, particularly preferably in the range of 1.65 to 1.75. At the end of the ring segment 6 opposite side of the indentation 8th is a second radius R4 arranged.

The ratio of the width X2 - X1 the dent 8th to the width X4 of the basic body 2 is preferably in the range of 0.75 to 1.25, more preferably in the range of 1.0 to 1.2.

As the illustration in 4 can be further removed, the indentation has an inner edge 11 on, which has a straight course. The inner edge 11 is oriented such that an imaginary extension of the inner edge 11 with a tangent on the outer edge 4 in the end point of the outer edge 4 at the ring segment end 6 an angle α which is in the range of 5 ° to 15 °, preferably 7 ° to 13 °, more preferably 9 ° to 11 °.

The indentation 8th also has an undercut 9 on top of the ring segment end 6 facing side of the indentation 8th is arranged. The undercut 9 has a circular contour. In that sense, the undercut 9 through an undercut radius R1 educated. The ratio of the undercut radius R1 to the width X4 of the basic body 3 is preferably in the range of 0.2 to 0.5, more preferably in the range of 0.22 to 0.3, for example in the range of 0.25 to 0.27.

On the ring segment end 6 opposite side is the indentation 8th On the other hand, they are undecorated. Rather, the indentation points 8th on the ring segment end 6 side facing away from a circular contour with a recess radius R3 on. The ratio of the indentation radius R3 to the width X4 of the basic body 3 may be in the range of 0.1 to 0.6, preferably in the range of 0.2 to 0.4, more preferably in the range of 0.25 to 0.35.

LIST OF REFERENCE NUMBERS

1

circlip

2

body

3

inner edge

4

outer edge

5

Ring Segment terminator

6

Ring Segment terminator

7

indentation

8th

indentation

9

undercut

10

gap

11

inner edge

100

casing

101

drilling

102

bore groove

X1

distance

X2

distance

X3

distance

X4

width

R1

Hinterschneidungs radius

R2

radius

R3

Dent radius

R4

radius

S

axis of symmetry

α

corner

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

• US 4756212 A [0004]

Claims (10)

Circlip (1) for securing a component in a bore, with a ring-segment-shaped main body (2) having two ring segment ends (5, 6), wherein in the region of each ring segment end (5, 6) in the base body (2) a recess for inserting one end of a circlip pliers is arranged, characterized in that the recesses are formed as indentations (7, 8) on an inner edge (3) of the ring-segment-shaped base body (2). Circlip after Claim 1 , characterized in that the recesses (7, 8) are arranged on the inner edge (3), that the course of the inner edge (3) of the ring-segment-shaped base body (2) on both sides of the recess (7, 8) a common Curve line describes, in particular a common circular segment-shaped curve line. Circlip according to one of the preceding claims, characterized in that the indentations (7, 8) on one of the ring segment end (5, 6) side facing each have an undercut (9). Circlip after Claim 3 , characterized in that the undercut (9) has a circular contour. Circlip after Claim 4 , characterized in that the undercut (9) has a circular contour with an undercut radius (R1), wherein the ratio of the undercut radius (R1) to the width (X4) of the base body (3) in the range of 0.2 to 0.5, preferably in the range of 0.22 to 0.3, particularly preferably in the range of 0.25 to 0.27. Circlip according to one of the preceding claims, characterized in that the indentations (7, 8) on one of the ring segment end (5, 6) facing away from each side are formed without undercuts. Locking ring according to one of the preceding claims, characterized in that the indentations (7, 8) on a side facing away from the ring segment end (5, 6) have a circular contour with a recess radius (R3), wherein the ratio of the indentation Radius (R3) to the width (X4) of the base body (3) in particular in the range of 0.1 to 0.6, preferably in the range of 0.2 to 0.4, particularly preferably in the range of 0.25 to 0, 35, lies. Circlip according to one of the preceding claims, characterized in that the ring segment end (6, 7) facing side of the recess (7, 8) has a first distance (X1) of the ring segment end (6, 7), wherein the Ratio of the first distance (X1) to the width (X4) of the base body (3) in the range of 0.4 to 0.8, preferably in the range of 0.5 to 0.7, particularly preferably in the range of 0.55 to 0.65, is. Circlip according to one of the preceding claims, characterized in that the side facing away from the ring segment end of the indentation has a second distance (X2) from the ring segment end (6, 7), wherein the ratio of the second distance (X2) to the width (X4) of the main body (3) in the range of 1.5 to 2.0, preferably in the range of 1.6 to 1.8, particularly preferably in the range of 1.65 to 1.75. Assembly with a housing (100), a planetary gear with a ring gear and a locking ring (1) for securing the ring gear on the housing (100), characterized in that the locking ring is formed according to one of the preceding claims.

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