U.S. patent application number 10/701836 was filed with the patent office on 2004-08-12 for support part with fixing pin.
Invention is credited to Schneider, Wilhelm.
Application Number | 20040155162 10/701836 |
Document ID | / |
Family ID | 32318495 |
Filed Date | 2004-08-12 |
United States Patent
Application |
20040155162 |
Kind Code |
A1 |
Schneider, Wilhelm |
August 12, 2004 |
Support part with fixing pin
Abstract
In the case of a support part (3) having at least one locating
hole (2) in which a fixing pin (1) is captively arranged, the
latter has a bottom insertion section (1c) and a center shank
section (1b) and also a top retaining section (1a) with a number of
retaining teeth (12, 13) of different length, at least one
comparatively long retaining tooth (12) overlapping the hole edge
(15) of the locating hole (2) at the top and at least one
comparatively short retaining tooth (13) undercutting the hole edge
(15) on the underside.
Inventors: |
Schneider, Wilhelm;
(Rednitzhembach, DE) |
Correspondence
Address: |
LERNER AND GREENBERG, P.A.
POST OFFICE BOX 2480
HOLLYWOOD
FL
33022-2480
US
|
Family ID: |
32318495 |
Appl. No.: |
10/701836 |
Filed: |
November 5, 2003 |
Current U.S.
Class: |
248/222.13 ;
248/220.21 |
Current CPC
Class: |
F16B 21/086 20130101;
F16B 21/084 20130101; F16B 19/02 20130101 |
Class at
Publication: |
248/222.13 ;
248/220.21 |
International
Class: |
A47K 001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 6, 2002 |
DE |
102 51 998.6 |
Claims
1. A support part (3) having at least one locating hole (2) in
which a fixing pin (1) is captively arranged, characterized in that
the fixing pin (1) has a bottom insertion section (1c) and a center
shank section (1b) and also a top retaining section (1a) with a
number of retaining teeth (12, 13) of different length, at least
one comparatively long retaining tooth (12) overlapping a hole edge
(15) of the locating hole (2) at the top and at least one
comparatively short retaining tooth (13) undercutting the hole edge
(15) on the underside.
2. The support part as claimed in claim 1, characterized in that
the comparatively long retaining tooth (12) is angled outward at
the end.
3. The support part as claimed in claim 1 or 2, characterized in
that the comparatively short retaining tooth (13) is angled outward
or inward at the end.
4. The support part as claimed in one of claims 1 to 3,
characterized in that the retaining teeth (12, 13) of the fixing
pin (1) are elastic.
5. The support part as claimed in one of claims 1 to 4,
characterized in that the comparatively long retaining teeth (12)
of the fixing pin (1) are bent at least slightly outward.
6. The support part as claimed in one of claims 1 to 5,
characterized in that the comparatively short retaining teeth (13)
of the fixing pin (1) are bent at least slightly outward, the
circumferential diameter (C) of the fixing pin (1) at the free end
of the comparatively short retaining teeth (13) being greater than
the hole diameter (A) of the locating hole (2).
7. The support part as claimed in one of claims 1 to 6,
characterized by a cylindrical shank section (1b) of the fixing pin
(1) extending between the retaining section (1a) and the insertion
section (1c).
8. The support part as claimed in one of claims 1 to 7,
characterized in that the insertion section (1c) of the fixing pin
(1) is designed to be elastic.
9. The support part as claimed in one of claims 1 to 8,
characterized in that the insertion section (1c) of the fixing pin
(1) is recessed over its section length while push-in arms (20) are
formed.
10. The support arm as claimed in one of claims 1 to 9,
characterized in that the insertion section (1c), at the end, has a
bevel (19) directed inward.
11. The support part as claimed in one of claims 1 to 10,
characterized in that the fixing pin (1), on the circumference, has
at least one prominence (18) for enlarging the pin diameter
(D).
12. The support part as claimed in one of claims 1 to 11,
characterized in that the fixing pin (1) is designed as a one-piece
sleeve.
13. The support part as claimed in one of claims 1 to 12,
characterized in that the fixing pin (1) has a continuous
longitudinal slot (24) running in the axial direction.
14. The support part as claimed in one of claims 1 to 13,
characterized in that the fixing pin (1) is held with radial
clearance (22) and/or axial clearance in the locating hole (2).
15. The support part as claimed in claim 13, characterized in that
the comparatively long retaining teeth (12) are angled outward in
such a way that said retaining teeth (12) bear against the hole
edge (15) of the locating hole (2).
16. The support part as claimed in claim 15, characterized in that
the fixing pin (1) is held in the locating hole (2) in a centered
manner.
17. A fixing pin (1) for positioning and/or retaining a support
part (3), in particular a gasket, on a mounting part (6), in
particular a cylinder head of a piston engine, characterized by a
retaining section (1a), having a number of retaining teeth (12, 13)
of different length accommodating a hole edge (15) of a locating
hole (2) of the support part (3) between them, and a center shank
section (1b), which can be inserted into a hole (8) of the mounting
part (6) via an insertion section (1c), for producing a push-in
connection between the support part (3) and the mounting part
(6).
18. The fixing pin (1) as claimed in claim 17, having lugs (25)
which are integrally formed on the comparatively long retaining
teeth (12) and form a virtually closed ring (27).
Description
[0001] The invention relates to a support part having at least one
locating hole in which a fixing pin is captively arranged. In this
case, the term "support part" refers to an intermediate support of
small thickness, in particular a gasket, e.g. a cylinder head
gasket.
[0002] When fitting such a support part in the form of a cylinder
head gasket for example, it is often necessary to fix this support
part, effective as an intermediate support, to a substructure in
the form of a mounting part, e.g. a cylinder head or block. Such
fixing is necessary in particular when, during the attachment of a
further mounting part, e.g. of a cover or an intake manifold, there
is the risk of a transverse displacement of the support part
relative to this or these mounting parts. Such fixing is virtually
essential when fitting at obliquely running joints or sealing faces
of the mounting parts to be joined.
[0003] In particular in the case of a support part made of plastic,
fixing pins are integrally extruded on the support plate for this
purpose. Such a support part in the form of a single-layer
sheet-metal gasket with securing elements integrally formed in one
piece has been disclosed by DE 100 13 130 A1. The securing
elements, which in the fitted state in each case pass through a
drill hole of a machine component in the form of an intake manifold
flange, engage behind the opening edge of the corresponding drill
hole by means of their projections provided for this purpose at the
free end, so that the metal gasket, on account of its one-piece
connection with the securing elements, is held on the flange-like
machine component.
[0004] In a cylinder head gasket for piston engines which is
disclosed by DE 33 21 425 A1, the cylinder head gasket is fixed in
position relative to a cylinder block by fixing bushes which are
firmly connected by means of upset or beaded edges to the plate
forming the cylinder head gasket. In the fitted state, the fixing
bushes engage with friction grip in corresponding blind holes of a
cylinder block.
[0005] The object of the invention is to specify an especially
suitable support part having fixing pins.
[0006] This object is achieved according to the invention by the
features of claim 1. To this end, the fixing pin has a bottom
insertion section and a center shank section and also a top
retaining section with a number of retaining teeth of different
length. In the fitted state, the or each comparatively long
retaining tooth overlaps an associated hole edge of the locating
hole of the support part at the top, whereas the or each
comparatively short retaining tooth, at the opposite underside of
the hole edge, undercuts or engages behind the latter. This is
achieved in that the outside or circumferential diameter of the
fixing pin in the end region of the comparatively short retaining
teeth is greater than the hole diameter of the locating hole.
[0007] According to an expedient configuration of the fixing pin,
its comparatively long retaining teeth are angled outward at the
end. The respective comparatively short retaining tooth can be
angled outward or inward at the end. This angled configuration at
the end of the comparatively short retaining teeth permits a
reliable captive retention of the fixing pin inside the locating
hole and thus on the support part. For this purpose, the short
retaining teeth with angled tooth ends, after insertion of the
fixing pin into the locating hole, assigned to the latter, of the
support part, e.g. by a pressing operation, are bent out to such an
extent that the undercut is produced up to the hole bearing surface
on the underside on the hole edge of the locating hole.
[0008] The fixing pins are expediently fixed in the locating holes
assigned to them by means of a snap connection. To this end, the
retaining teeth of the fixing pin are advantageously bent at least
slightly outward and are at the same time elastic. As a result of
the comparatively short retaining teeth being bent outward, the
circumferential diameter of the fixing pin at the free end of the
comparatively short retaining teeth is greater than the hole
diameter of the locating hole.
[0009] In the embodiment variant with subsequent bending-out of the
short retaining teeth, the fixing of the fixing pin is achieved by
lasting or permanent deformation.
[0010] The center shaft section of the fixing pin, this center
shaft section adjoining the top retaining section having the
retaining teeth of different length, is expediently cylindrical in
cross section.
[0011] The insertion section, over its section length in the axial
direction of the fixing pin, has at least one recess, preferably a
plurality of recesses, with push-in arms being formed. In this way,
the insertion section of the fixing pin is designed to be elastic
in a simple and reliable manner. In addition, the insertion
section, at the end, has a bevel directed inward. This bevel serves
as an aid for inserting the fixing pin into a mounting hole of a
mounting part, e.g. of a cylinder head, on the sealing face of
which the support part having the integrated fixing pin is fitted.
In addition, the fitting is in this case facilitated by the elastic
configuration of the insertion section. As a result, the fitting is
possible in a simple and reliable manner even in the case of a
production-related center offset between the locating hole of the
support part and a corresponding hole in the mounting part, also
referred to below as machine part.
[0012] The fixing pin is locally enlarged with regard to its
outside diameter. This is expediently achieved by a prominence
which is provided on the circumference of the fixing pin and is in
particular in the form of local bulges or integrally formed warts.
These expediently only local enlargements in diameter are
advantageously arranged in that region of the insertion section
which adjoins the center shank region, in particular between the
center shank section and the bevel, directed inward, of the
insertion section. Especially firm seating of the fixing pin in the
drill hole of the machine part is achieved by the local enlargement
in diameter.
[0013] In order to compensate for a possible center offset between
the locating holes, captively retaining the fixing pins, of the
support part and the holes, corresponding to said locating
holes,.in the machine or mounting part, the fixing pin is inserted
into the corresponding locating hole of the support part with a
certain radial clearance. In this case, the desired firm seating of
the fixing pin in the support part is achieved by the comparatively
long retaining teeth being designed to be elastic and by being bent
or angled by a corresponding oversize relative to the shank
diameter of the center shank region of the fixing pin. At the same
time, the circumferential diameter of the fixing pin along the long
retaining teeth, in the prefitting state of the fixing pin, is
greater than the hole diameter of the locating hole of the support
part.
[0014] For a certain axial clearance of the fixing pin, in
particular for compensating for production-related tolerances of
the thickness or sheet thickness of the support part, the distance
or the difference in length between the short and the long
retaining teeth is at least slightly greater than the thickness of
the support part. The distance is expediently at least as large as
the largest possible thickness of the support plate in the region
of the locating hole. Firm seating of the fixing pin in the
locating hole is then nonetheless ensured, because, on account of
the spring action of the long retaining teeth, which spring action
is produced as a result of the inclined position of the long teeth
or the bending of the long teeth outward, an axial force component
is always present, which displaces the fixing pin axially upward
against the insertion direction in the locating hole of the support
part, that is to say virtually out of the hole, until the short
retaining teeth bear on the underside against the hole edge. The
comparatively long retaining teeth are in this case preferably
angled symmetrically outward in such a way that they bear against
the hole edge of the locating hole. As a result, the fixing pin is
held in a centered position in the locating hole virtually
automatically.
[0015] The fixing pin is expediently designed as a one-piece
sleeve. To this end, the fixing pin is preferably produced by
rolling a sheet-metal strip with corresponding recessed portions
and embossments. The slot or gap remaining when the sheet-metal
strip is rolled can in this case be advantageously used for
increasing the spring action--and thus during fitting and for
compensating for tolerances.
[0016] The fixing pin is used in an especially advantageous manner
when positioning and/or retaining a support part, in particular a
gasket, on a mounting part, in particular a cylinder head of a
piston engine. In this case, the top retaining section of the
fixing pin accommodates the hole edge of the respective locating
hole between its retaining teeth of different length and is thus
captively held on said support part. Via the expediently beveled
insertion section, which in addition is also advantageously
elastic, the fixing pin, with its center shank section, for
producing a reliable push-in connection between the support part
and the mounting part, can be inserted in an especially easy-to-fit
manner into a hole correspondingly provided in said mounting
part.
[0017] The advantages achieved with the invention consist in
particular in the fact that, even in the case of a support part
made of metal, e.g. aluminum, the fixing pins can be integrated in
said support part in a simple manner and with reliable retention
while avoiding integral extrusion, which requires an additional
operation. The risk of frequently occurring shearing-off of fixing
pins as a result of transverse displacements which occur, for
example, when attaching large or heavy mounting parts is also
avoided. The risk of such shearing-off is at least considerably
reduced, in particular if the fixing pins are made of a
load-bearing material, e.g. sheet steel.
[0018] The spring action of the retaining teeth and of the pin
shank of the fixing pin, in an especially advantageous manner,
achieve the effect that the pin center axis, with at the same time
firm seating of the fixing pin in the locating hole of the support
part, can follow a hole offset relative to the hole of the mounting
part by one long retaining tooth, for example, deviating to the
inside toward the pin center axis to a greater extent and by
another long retaining tooth deviating instead to the outside to a
greater extent.
[0019] Exemplary embodiments of the invention are explained in more
detail below with reference to a drawing, in which:
[0020] FIGS. 1 and 2 show a fixing pin according to the invention
of a support part in a perspective representation or front
view,
[0021] FIG. 3 shows a section III-III in FIG. 2 with a local
prominence on an enlarged scale,
[0022] FIG. 4 shows a cutaway view of a support part in the form of
an intermediate gasket with a fixing pin held in a locating
hole,
[0023] FIG. 5 shows a cutaway view of a mounting part as a
substructure with a hole for accommodating the fixing pin,
[0024] FIG. 6 shows the fixing pin retained in the locating hole in
a sectional representation,
[0025] FIG. 7 shows the support part mounted with the substructure
in a sectional representation according to FIG. 6,
[0026] FIG. 8 shows a detail VIII in FIG. 6 on an enlarged scale
for illustrating the force relationships at the fixing pin in the
hole edge region of the locating hole,
[0027] FIG. 9 shows the fixing pin retained in the support part and
having short retaining teeth angled outward in a cutaway
representation according to FIG. 6,
[0028] FIG. 10 shows the fixing pin having long retaining teeth
angled outward and short retaining teeth angled inward in a
representation according to FIG. 9, and
[0029] FIGS. 11 and 12 show the fixing pin having a virtually
closed ring in the region of the long retaining teeth.
[0030] Parts corresponding to one another are provided with the
same designations in all the figures.
[0031] In FIGS. 4, 6 and 7, the fixing pin 1 shown on its own in
FIGS. 1 and 2 is arranged in the form of a clip connection or snap
connection in a captive manner in a locating hole 2 of a support
part or intermediate support 3. According to FIG. 4, the support
part 3 has a sealing lip 4 and a perforated spacer 5 which also
serves for reinforcement.
[0032] The support part 3 is, for example, a cylinder head gasket
which, in the fitted state, is put onto a mounting part 6 shown in
FIG. 5 in the form of, for example, a cylinder head. In this case,
a hole 8 having the sealing surface 7 of the mounting part 6
accommodates the fixing pin 1. As a result, the support part 3
rests in position with its sealing surface 9 corresponding to the
sealing surface 7 of the mounting part 6 and having the sealing lip
4 and is at the same time securely retained at or on the mounting
part 6 by means of the fixing pin 1--and further fixing pins 1
fixed in corresponding locating holes 2 of the support part 3.
[0033] The retention of the support part 3 by means of the fixing
pins 1 on the mounting part 6 is effected in this case like a press
connection. The support part 3, in the case of a cylinder head
gasket, in combination with the fixing pins 1, is an intermediate
support between the crankcase 6 and a cylinder head (not shown).
The support part 3, with integrated fixing pins 1, may also be an
intermediate support of a pipe connection, e.g. of an
intake-manifold or flange connection of a machine component.
[0034] As can be seen in particular from FIG. 2, the fixing pin 1
consists of a top retaining section 1a and of a center shank
section 1b adjoining in the pin longitudinal direction 10 and also
of an adjoining bottom insertion section 1c. The top retaining
section 1a has a number of retaining teeth 12, 13 which extend in
the pin longitudinal direction 10 and in the direction of the
center longitudinal axis 11 of the fixing pin 1. In this case,
comparatively long retaining teeth 12 and, in contrast,
comparatively short retaining teeth 13 are provided.
[0035] As can be seen comparatively clearly from FIG. 1, the
retaining teeth 12, 13 are arranged in a uniformly distributed
manner at the circumference of the top retaining section 1a of the
fixing pin 1, which is sleeve-like overall. In this case, a
comparatively short retaining tooth 13 is arranged on both sides of
each comparatively long retaining tooth 12, and conversely a
comparatively long retaining tooth 12 is arranged on both sides of
each comparatively short retaining tooth 13. Overall, therefore,
the long retaining teeth 12 and the short retaining teeth 13 are
distributed alternately at the circumference of the fixing pin 1
and are preferably arranged equidistantly. In addition, the
retaining teeth 12, 13 are bent at least slightly outward and are
thus spread out relative to the center shank section 1b and the
bottom insertion section 1c with a corresponding increase in
diameter--starting from the center shank section 1b up to the free
end of the top retaining section 1a.
[0036] At the end, the comparatively long retaining teeth 12 are
bent approximately at right angles with collar-like lugs 14 being
formed. With these retaining lugs 14, the comparatively long
retaining teeth 12 of the fixing pin 1 enclose or overlap a hole
edge 15 of the support part 3 on the top side at a hole seating
surface 15a in the region close to the hole (FIG. 6). Thus the
fixing pin 1 is already secured against falling out in the pin
longitudinal direction 10 inside the locating hole 2 of the support
part 3. The fixing pin 1 is further secured inside the locating
hole 2 against the pin longitudinal direction 10 by the
comparatively short retaining teeth 13. For this purpose, the
latter bear against the bottom hole bearing surface 15b, opposite
the hole seating surface 15a of the hole edge 15, of the locating
hole 2 on the support part 3. The difference L in length (FIG. 2)
between the comparatively long retaining teeth 12 and the
comparatively short retaining teeth 13 corresponds in this case to
at least the thickness d of the support part 3 (FIG. 6) in the
region of the hole edge 15. The comparatively long retaining teeth
12, on the one hand, and the comparatively short retaining teeth
13, on the other hand, therefore accommodate the support part 3
between them in the region of the hole edge 15 of the locating hole
2. As a result, the fixing pin 1 inserted into the respective
locating hole 2 is firmly connected to the support part 3 and is
captively integrated in the latter.
[0037] The embodiment of the fixing pin 1 shown in FIGS. 1 and 2
and also in FIGS. 6 and 7, in its top retaining section 1a, leads
to a snap connection between the support part 3 and the fixing pin
1 when the latter is inserted into the respective locating hole
2.
[0038] In contrast, in the exemplary embodiments according to FIGS.
9 and 10, the fixing pin 1 is first of all only inserted into the
locating hole 2 of the support part 1. In this case, according to
FIG. 9, the comparatively short retaining teeth 13 are bent outward
at their tooth ends 17. In the embodiment variant according to FIG.
10, the tooth ends 17 are angled inward. In addition, the
comparatively short retaining teeth 13 of the fixing pin 1, in the
prefitting state, are directed inward toward the center
longitudinal axis 11 of the fixing pin 1 to such an extent that, in
the fitted state, by means of an outward deformation, they form or
produce the requisite undercut relative to the underside hole
bearing surface 15b of the locating hole 2.
[0039] The center shank section 1b of the fixing pin 1 expediently
has a cylindrical cross section with a shank outside diameter D.
The bottom insertion section 1c is locally enlarged relative to
this outside diameter D. As can be seen from FIGS. 2 and 3, this
diameter enlargement is achieved by local bulges or wart-shaped
prominences 18. In addition, the insertion section 1c is provided
with an inclined insertion surface in the form of a bevel 19
directed inward toward the center axis 11 of the fixing pin 1 at a
bevel angle .alpha.. This bevel 19 serves as an insertion aid when
the fixing pin 1 is inserted via its insertion region 1c with its
shank region 1b into the corresponding hole 8 of the mounting part
6. This is in particular advantageous with a center offset between
the locating hole 2 of the support part 3 and the hole 8 of the
mounting part 6.
[0040] In addition, the insertion section 1c of the fixing pin 1 is
designed to be elastic. To this end, the insertion region 1c is
provided with appropriate recesses 21 while elastic push-in arms 20
are formed. Instead of the recesses 21 in the shape of an arc of a
circle, said recesses 21 may also have other shapes. The bevel 19
and the spring action of the insertion section 1c of the spring pin
1 have an advantageous effect during the insertion of the spring
pin 1 into the hole 8 of the substructure or of the machine part
6.
[0041] When the fixing pin 1 is being fitted, it is inserted with
its insertion section 1c into the locating hole 2 of the support
part 3. The comparatively short retaining teeth 13 are bent
radially inward by pressure on the top side of the fixing pin 1 in
the pin longitudinal direction 10. In the process, the fixing pin 1
passes through the locating hole 2 to the maximum extent until the
retaining lugs 14 of the comparatively long retaining teeth 12 bear
against the top hole seating surface 15a of the hole edge 15. In
this end position, the comparatively short retaining teeth 13
spring back and engage below or behind the support part 3 on the
bottom hole edge 15 in the region of the hole bearing surface 15b.
A captive arrangement of the fixing pin 1 in the support part 3
like a snap connection is thus provided for, in interaction with
the comparatively long retaining teeth 12. The alternative
fastening of the fixing pin 1, in which the undercut is produced by
bending out the short retaining teeth 13 after insertion of the
fixing pin 1 into the locating hole 2, e.g. by a pressing
operation, is shown in FIGS. 9 and 10.
[0042] In order to compensate for a possible center offset between
the hole 8 of the substructure or of the mounting part 6 and the
corresponding locating hole 2 of the support part 3, the fixing pin
1 can be inserted in the locating hole 2 of the support part 3 with
a certain radial clearance 22 (FIGS. 6 to 8). Firm seating of the
fixing pin 1 in the support part 3 is then made possible by the
circumferential diameter B in the top retaining section 1a and
below the retaining lugs 14, there, of the long retaining teeth 12
being greater than the hole diameter A of the locating hole 2. As a
result, the long, elastic retaining teeth 12 always rest with a
certain spring prestress in the locating hole 2. The comparatively
long retaining teeth 12 are therefore designed with a corresponding
oversize relative to the shank diameter D and the hole diameter A
of the locating hole 2.
[0043] In this case, the outside diameter B, indicated in FIG. 2,
of the end top retaining section 1a of the fixing pin 1 is
expediently greater than or equal to the hole or opening diameter A
of the locating hole 2 in the support part 3 (FIG. 7). This means
that the comparatively long retaining teeth 12, at the end, partly
bear with their outside against the hole edge 15, i.e. against the
inner hole wall 23 (FIG. 7) of the locating hole 2.
[0044] As illustrated with the aid of FIG. 8, which shows a long
retaining tooth 12 released from the hole edge 15 of the locating
hole 2, forces occur between the retaining teeth 12 and the hole
edge 15 as a result of the spring action of said retaining teeth
12. The indicated axial component F.sub.ax of the spring or
restoring force F produced by the long retaining teeth 12 being
bent out thus leads to a situation in which the short retaining
teeth 13 come to bear on the underside against the hole edge 15 and
at this location against the hole bearing surface 15b irrespective
of the thickness d of the support part. Tolerances of the thickness
d of the support part are thereby compensated for in a simple and
reliable manner.
[0045] The radial component F.sub.rad produces firm seating in the
radial direction irrespective of the hole tolerance of the locating
hole 2 and the diameter of the fixing pin 1. Furthermore, the
fixing pin 1 is also centered virtually automatically in the
locating hole 2 as a result. The long retaining teeth 12 are
therefore bent outward preferably symmetrically to the center
longitudinal axis 11 of the fixing pin 1 and at the same time are
directed so as to run outward at an angle.
[0046] When the support part 3 fitted with the fixing pins 1 is put
onto the substructure or the mounting part 6, the fastening between
the support part 3 and the mounting part 6 is effected by pressing
the fixing pins 1 into the hole 8 of the mounting part 6.
[0047] The fixing pin 1 is preferably produced by rolling a
sheet-metal strip with corresponding recessing and embossment. The
longitudinal slot 24 (FIG. 6) which is thereby present and is
continuous in the axial or pin longitudinal direction can be used
for increasing the spring action of the fixing pin 1, a factor
which simplifies the fitting and increases the firm seating of the
fixing pin 1.
[0048] FIGS. 11 and 12 show the fixing pin 1 with lugs 25 which are
integrally formed on the comparatively long retaining teeth 12 on
both sides and which form a virtually closed ring 27 in the
circumferential direction of the fixing pin 1 in its top retaining
section 1a while forming slots or gaps 26. Depending on the
position and width of the slots 26, the comparatively short
retaining teeth 13 are at least partly overlapped in the
longitudinal direction 10 by the lugs 25.
[0049] As a result of the ring 27, which is virtually closed
axially at the end in the circumferential direction of the fixing
pin 1, the risk of a plurality of fixing pins 1 becoming caught,
e.g. during their surface treatment or during their transport in a
common packing, is at least reduced.
[0050] List of Designations
[0051] 1 Fixing pin
[0052] 1a Retaining section
[0053] 1b Shank section
[0054] 1c Insertion section
[0055] 2 Locating hole
[0056] 3 Support part
[0057] 4 Sealing lip
[0058] 5 Spacer/reinforcement
[0059] 6 Mounting part/substructure
[0060] 7 Sealing surface
[0061] 8 Hole
[0062] 9 Sealing surface
[0063] 10 Pin longitudinal direction
[0064] 11 Center longitudinal axis
[0065] 12 Long retaining tooth
[0066] 13 Short retaining tooth
[0067] 14 Retaining lug
[0068] 15 Hole edge
[0069] 15a Hole seating surface
[0070] 15b Hole bearing surface
[0071] 17 Tooth end
[0072] 18 Prominence
[0073] 19 Bevel
[0074] 20 Push-in arm
[0075] 21 Recess
[0076] 22 Radial clearance
[0077] 23 Hole wall
[0078] 24 Longitudinal slot
[0079] 25 Lug
[0080] 26 Slot/gap
[0081] 27 Ring
[0082] .alpha. Angle
[0083] A Hole diameter
[0084] B Outside diameter
[0085] C Circumferential diameter
[0086] D Shank outside diameter
[0087] F Spring force
[0088] F.sub.ax Axial component
[0089] F.sub.rad Radial component
[0090] L Difference in length
[0091] d Thickness of support part
* * * * *