EP1029143B1 - Locking device with a key-activated cylinder core - Google Patents

Abstract

The invention relates to a locking device with a key-activated cylinder core (10) which when turned, performs various locking functions. A cylinder guide (14) is used to mount the cylinder core (10) in such a way that it can turn, said cylinder guide (14) having stopping points (13) for tumblers (12) situated in the cylinder core (10). In order to reduce the axial construction length (28) as far as possible, the cylinder guide (14) is accommodated in a housing (17) in such a way that it is fixed axially but can still turn, and is mounted in the key end area, the other area of the cylinder guide (14) being encompassed by a sliding member (20) which is torsionally rigid in relation to the cylinder guide (14) but is axially displaceable on the same. A spring (33) which is supported in such a way that it is fixed in relation to the housing acts axially upon a turning member (40) and therefore upon the sliding member (20), said sliding member moving synchronously with the turning member (40). An overload protection element (30) has a control section (32) which is located on the housing (17) and a counter-control section (31) which is spring-loaded in relation to the control section (32).

Description

The invention relates to a closure device with a key-operated cylinder core, which by turning functions, in particular in a motor vehicle. For pivoting the cylinder core serves a cylinder guide, the blocking points for those located in the cylinder core Has tumblers. To make the locking device theft-proof, is an overload protection is provided, which consists of an axially fixed control profile and from an axially movable, spring-loaded against the control profile Countermeasure profile exists. The overload occurs when, without a key, one violent rotation is exerted on the cylinder core. Then it rises Counter-control profile axially out of the control profile and uncouples a rotary element opposite to the cylinder core and the cylinder guide is due to the rotation the tumblers connected to it can rotate freely. The rotary link is now ineffective while it is normally, when actuated by the key, the the desired locking functions, e.g. in a castle.

In a known closure device of this type (DE 41 22 414 C1) that is Control profile and the counter control profile of the overload protection between the housing and the overload protection arranged while the clutch between the Rotary member and the cylinder core is formed. The cylinder guide is opposite the housing axially spring loaded. Between the housing and the cylinder guide a space-consuming annular space for a helical spring must be arranged, which surrounds a portion of the cylinder guide. The assembly of these components is cumbersome and time consuming. When changing from normal to overload guides the cylinder guide together with the cylinder core stored in it Axial movement because the control profile of the overload protection from the Countermeasures profile. This is annoying. This disruptive axial movement from Pipe fall in the overload case can be axially outward (see. Fig. 1 to 9) or axially be directed inwards (see FIG. 10).

There are also closure devices of the type mentioned at the beginning (DE 44 10 783 C1) where the cylinder guide is not spring loaded and, together with the one in it mounted cylinder core, always occupies an axially fixed position in the housing. At the Transition between the key-operated normal case and the one by The cylinder core consequently leads to a break-in tool caused by an overload no disturbing axial movement. There is also radial space saved because a compression spring acting on the cylinder guide is missing. The disadvantage of this device is the large axial length. The tax profile and the counter-control profile of the overload protection are between the inner Front end of the cylinder guide and a pressure ring arranged, although longitudinally displaceable but non-rotatable with the one performing the locking functions Rotary member is connected.

The invention has for its object a closure device of the beginning to develop the type mentioned, in which the cylinder guide and the cylinder core axially fixed in the housing and freely rotatable in the event of an overload, but themselves are characterized by a small axial length. This is due to the im Claim specified measures achieved, the following special Importance.

The housing only stores the key-side area of the cylinder guide while the other area of the cylinder guide is surrounded by a sliding member, which Compared to the cylinder guide, it is non-rotatable but axially displaceable. The sliding link is provided by the rotary link that transfers the locking functions comprises, which is rotatable relative to the sliding member and synchronized with this is axially movable. The spring for overload protection acts axially on the Rotating member and thus on the sliding member movable synchronously with the rotating member. The profiles of the overload protection are on the one hand between the sliding link and the housing used to support the cylinder guide arranged. In the invention, the profiles of the overload protection without further be arranged in that axial section of the cylinder core where the Cylinder core the tumblers and the cylinder guide the locking receptacles for the Has tumblers. This results in a reduction in the axial length compared to the latter prior art.

Fig. 1

die Draufsicht auf den Verschluß vor seinem Einbau in der Tür eines Kraftfahrzeugs,

Fig. 2

schematisch, einen Axialschnitt der Schnittlinie II - II von Fig. 1, wenn sich die Bauteile in ihrer Ruheposition und Ausgangsdrehstellung befinden, wobei sowohl der Zylinderkern als auch die Zylinderführung im unteren Halbschnitt an ihrem Innenende weggebrochen sind, um einen Durchblick auf die Innenflächen der ihn radial umschließenden Bauteile, zu gestatten, nämlich ein Zylindergehäuse und ein Schiebeglied, während im oberen Halbschnitt, als

Fig. 2a,

eine dazu senkrechte Schnittführung längs der Schnittlinie IIa - IIa von Fig. 1 durch einen Zylinderkern und eine Zylinderführung erfolgt,

Fig. 3

in einer zur Fig. 2 und 2a analogen Darstellung, einen Axialschnitt durch die Vorrichtung längs der Schnittlinie II - II und IIa - IIa von Fig. 1, wenn ein Überlastfall vorliegt, wo über ein Einbruchswerkzeug eine gewaltsame Drehung der Bauteile erfolgt, und

Fig. 4

einen Querschnitt durch die Vorrichtung längs der Schnittlinie IV - IV von Fig. 2.

Further measures and advantages of the invention result from the subclaims, the following description and the drawings. In the drawings, the invention is shown in one embodiment. Show it:

Fig. 1

the top view of the lock before its installation in the door of a motor vehicle,

Fig. 2

schematically, an axial section of the section line II - II of Fig. 1, when the components are in their rest position and starting rotary position, with both the cylinder core and the cylinder guide in the lower half-section broken away at their inner end to give a view of the inner surfaces of it radially enclosing components to allow, namely a cylinder housing and a sliding member, while in the upper half section, as

Fig. 2a,

a perpendicular cut along the section line IIa - IIa of FIG. 1 by a cylinder core and a cylinder guide,

Fig. 3

in a representation analogous to FIGS. 2 and 2a, an axial section through the device along the section line II - II and IIa - IIa of FIG. 1, if there is an overload situation, where a forceful rotation of the components takes place via a break-in tool, and

Fig. 4

a cross section through the device along the section line IV - IV of FIG. 2nd

The closure device comprises a cylinder core 10 with springs 11 force-loaded tumblers 12, which are received there in a radially movable manner normally with their ends in locking receptacles 13 of a cylinder guide 14 intervention. The locking shots 13 of neighboring tumblers 12 are in the present case separated by webs in the cylinder guide 14 what the stability increases. The cylinder core 10 is a key 15 with an adapted Key profile assigned, which in the key channel 16 of the Cylinder core 10, the protruding ends of the tumbler 12 on the Sorted core cross-section and therefore the cylinder core 10 against the Cylinder guide 14 releases for rotation. The cylinder guide 14 serves normally for the rotary bearing of the cylinder core 10.

The cylinder guide 14 is axially fixed but rotatable in a housing 17 added, which is fixed in the interior of the motor vehicle door becomes. By means of an overload protection device 30 to be described in more detail indirectly, normally via a sliding member designed here as a sleeve 20 the cylinder guide 14 is held non-rotatably in the housing 17. Between the inner surface of the sliding sleeve 20 and the peripheral surface of the cylinder guide 14 there is a complementary radial toothing 21, both an axial guidance of the sliding sleeve 20 on the cylinder guide 14 and a non-rotatable connection between the cylinder guide 14 and the sliding sleeve 20 generated. This does not only apply to normal cases the closure shown in Fig. 2, but also for the Overload case, to be described in more detail in FIG. 3.

In the normal case, as shown in FIG. 2, the cylinder core 10 is a pulse spring in the starting rotary position illustrated by the auxiliary line 19 in FIG. 1 held. Via the key 15 inserted in the key channel 16 can now the cylinder core 10 in the two by the auxiliary line 19 'or 19 "marked working rotary positions are transferred, which correspond to a secured and unlocked position of the closure. The rotations of the. Illustrated by the rotation arrows 18, 18 'in Fig. 1 Cylinder core 10 act in this normal case in analog Rotations 48 and 48 'of a working arm belonging to a rotating member 40 41 out. This working arm 41 is normally in the by the auxiliary line 49 in Fig. 1 illustrated the initial rotational position by turning controls to be described in more detail in the sense of the rotating arrows 48, 48 'into those identified by the corresponding auxiliary lines 49', 49 " Rotational positions is transferred. As shown in Fig. 1, is on one Swivel joint 42 of the working arm 41 is connected to a working rod, which in The direction of the dash-dotted arrow 43 and the first link one is not shown castle. The rotational positions 49 ', 49 "correspond a secured or unlocked position of the lock. In the secured Position is the actuation of a handle on the motor vehicle door successful, but in the unlocked position the handle actuation is ineffective. In the part of the housing designated 39 17 there are control means for a so-called "central locking" of the motor vehicle, via which several on different doors of the motor vehicle arranged closures interact.

As is apparent from Fig. 2, the rotary member 40 has a cylinder section 44, which is rotatably mounted on the sliding sleeve 20. The sliding sleeve 20 has at its inner end an axial inner shoulder 25 on which an axial counter shoulder provided on the rotary member 40 is located on the outside 45 supports. At this point there is a transmission by Force arrow 34 in Fig. 2 illustrate axial spring loading between the rotary member 40 and the sliding sleeve 20. This spring load 34 arises by a compression spring 33, which is in an axial receptacle 46 in the Rotary member 40 is arranged. The outer end facing the housing 17 47 of the rotating member 40 remains unsupported.

The axial coupling between the rotary member 40 and the cylinder core 10 or its axial extension usually comes together by two engaged coupling parts 51, 52 of a clutch 50. In the illustrated embodiment, as shown in FIG. 4, the one coupling part made of diametrical radial projections 51 on Cylinder core 10 and the other coupling part from corresponding recesses 52 in an inner flange of the cylinder section 44. The spring 33 normally holds the rotary member 40 in the coupling position according to FIG. 2 and 4. The spring load is based on the counter shoulder mentioned 45 and inner shoulder 25 on the sliding sleeve 20, which in turn either on an inner surface of the housing 17 or - via one in the area their inner shoulder 25 provided inner flange - at the inner end the cylinder guide 14 abuts. This results in compared to the Cylinder core 10 which is illustrated by the auxiliary line 53 in FIG. 2 coupling effective starting position 53 of the rotary member 40. The above Rotations 18, 18 'of the cylinder core 10 act on the rotating member 40 in analog rotations 48, 48 'of the working arm 41.

The spring 33 is supported with its inner end on an end plate 22 from which with a cylindrical seen in the section in Fig. 4 Approach 23 in the aforementioned axial receptacle 46 of the rotary member 40 can. The end plate 22 is axially fixed with respect to the cylinder core 10 or the stationary housing 17 positioned. In the present case there is a fixed connection 24 shown in FIG. 3 between the end plate 22 and the inner end of the cylinder core 10 in front.

In the exemplary embodiment, the axial spring load 34 also serves the overload safety device 30 normally engages, as shown in FIG. 2 hold. The overload protection consists of two profile parts 31, 32 which are tax effective with each other. They consist of an axially fixed control profile 32, which is part of the housing 17 and in the present case from a recess 32 delimited by two inclination surfaces in one Inner wall of the housing 17 is made. The moving counter-control profile is located on the outer end of the sliding sleeve 20 and consists of a cam 31 with correspondingly inclined flanks. It goes without saying that the profile parts interacting in pairs, namely a radial projection 31 and a recess 32, multiple, over the circumference the sliding sleeve could be distributed, arranged; z. B. two pairs in a diametrical position to each other.

2, as already mentioned, is the engagement position of the cam 31 in the recess 32 in front, whereby the sliding sleeve 20 is not rotatable. The sliding sleeve 20 is also through the profiles 31, 32 of the overload protection device is held in a certain rotational position. This has a corresponding effect via the radial toothing 21 mentioned Rotational position of the cylinder guide 14. So that's about the in the Locking points 13 of the cylinder guide 14 tumblers 12 the mentioned output rotational position 19 of the cylinder core 10 is determined.

3, as has already been said, is the overload case of the device shown. Via an intrusion tool engaging the cylinder core 10 35 a violent rotation 36 is exerted on the cylinder core 10 Service. In this case, the tumblers 12 are in locking engagement with the Cylinder guide 14, as shown in FIG. 2 in the lower half section. at the violent rotation 36 is consequently the cylinder guide 14 from Cylinder core 10 taken away. Between the sloping flanks of the two Profile parts 31, 32 create an axial, counteracting the spring load 34 Force which the or the cams 31 from the or the stationary Recesses 32 lifts. The cam 31 comes with its cam tip to lie on an inner end face 27, on which he during violent Further rotation 36 slides along. This is the sliding sleeve 20 according to the profile height of 31, 32 by the axial movement arrow 26 shown in Fig. 3 distance shifted inwards. Via the inner shoulder 25 of the sliding sleeve 20 and the counter shoulder 45 the rotary member 40 has also been taken along this distance 26 and is located in the line illustrated by the auxiliary line 53 'in FIG. 3, axially offset "push position". This has two consequences.

As can be seen from Fig. 3, the rotary member 40 with its described above Coupling part 52 with respect to the mating coupling part located on the cylinder core 10 51 disengaged. The violent rotation 36 of the cylinder core 10 can therefore not be transferred to the rotary member 40. about the toothing 21 rotates the sliding sleeve 20 in the violent Rotation 36 of the cylinder guide 14 with, but remains on the rotary member 40 without effect. The rotary member 40 is only axially offset by the distance 26. His working arm 41 remains in the starting rotational position illustrated in FIG. 1. An actuation of the working rod leading to the lock 43 consequently does not take place during the violent rotation 36.

In addition, manipulations for other twisting are 48 or 48 'of the working arm 41 prevented from rotating member 40 by rotating blockages. In the thrust position 53 ', the rotary member 40 is in alignment with housing-fixed surfaces, not shown, which have an adjustment exclude the working arm 41 by manipulation.

The device according to the invention is characterized by a surprising small axial length 28 from. Such a small axial dimension is great for arranging the device inside a vehicle door Cheap. This small axial dimension is due to the sliding sleeve 20 positioned in a substantial radial overlap on the cylinder guide 14 and thus in the axial section designated 29 in FIG. 2 of the locking cylinder is arranged where the last tumblers 12th are located. The sliding sleeve 20 is therefore in this inner control section 29 between cylinder core 10 and cylinder guide 14. In this control section 29, the rotary member 40 is also positioned. You need it little or no axial space for the arrangement of the sliding sleeve 20 and the rotary member 40. It suffices for the arrangement of the axial clutch 50 required space.

1 shows, the housing 17 can be part of a bow-shaped Formed 37 be. On the housing there are documents recognizable from FIG 56 provided with which the housing or bracket 37 on the Can support the inner surface of the door panel.

The spring 33 described above can be seen from FIG. 4 spring legs 38, between which on the one hand a segment 54 of the rotary member 40 and on the other hand, there is a stationary segment 55 of the housing 17. As a result, the above-mentioned initial rotational position 49 of the rotary member 40 ensured by Fig. 1. The key 15 is normally after the Release 18 or 18 'of Fig. 1 released, the spring 33 transfers the spring legs 38 the rotary member 40 back. About the aforementioned clutch 50 this provision affects itself in a corresponding automatic Return of the cylinder core 10 in its starting rotary position 19 from Fig. 1 from.

LIST OF REFERENCE NUMBERS

10

cylinder core

11

Tumbler spring

12

tumbler

13

Blocking point, blocking reception in 14

14

Cylinder guide for 10

15

Key for 10

16

Key channel in 10

17

casing

18

Arrow of rotation of 10 between 19 and 19 ''

18 '

Arrow of rotation of 10 between 19 and 19 '

19

Auxiliary line of the starting rotary position of 10

19 '

Auxiliary line of a first working position of 10

19 "

Auxiliary line of a second working rotary position of 10

20

Sliding link, sliding sleeve

21

radial toothing between 20, 14 effective for axial guidance

22

end disk

23

cylindrical approach of 22

24

fixed connection between 22, 10

25

axial inner shoulder at 20

26

axial stroke distance in case of overload (Fig. 3)

27

End face of 17

28

axial length of the device or the cylinder core 10

29

Axial section of 10, 14, control section

30

Overload protection

31

first profile part of 30, counter steering profile, radial projection

32

second profile part, axially fixed control profile, recess

33

A rotary-push-spring

34

Arrow of the axial spring load of 40 or 20

35

Intrusion tool (Fig. 3)

36

violent rotation of 35, 10, 20 (Fig. 3)

37

Bracket with 17

38

Spring legs of 33 (Fig. 4)

39

Central locking control means (Fig. 1, 2)

40

rotary member

41

Working arm of 40

42

Swivel at 41 for 43

43

Movement arrow of the working bar of the castle

44

Cylinder section from 40

45

axial counter shoulder on 40 for 25

46

axial mount for 33 in 40

47

Outer end of 40

48

Arrow of 41 rotary motion between 49 and 49 "

48 '

Arrow of rotation of 41 between 49 and 49 '

49

Auxiliary line of the initial rotational position of 40

49 '

Auxiliary line of the first rotational position of 40

49 "

Auxiliary line of the second rotational position of 40

50

Coupling between 10, 40

51

first coupling part of 50, radial projection on 10

52

second coupling part, radial recess on 40

53

Auxiliary line of the initial axial position of 40 (FIG. 2)

53 '

Auxiliary line of the offset thrust position of 40 (Fig. 3)

54

Rotary link segment (Fig. 4)

55

Housing segment (Fig. 4)

56

document

Claims (9)

1. A lock device having a key-operated cylinder plug (10), which performs locking functions, in particular in a motor vehicle, by rotation (18, 18'), having the following further features:

   a cylinder guide (14), which comprises blocking points (13) for tumblers (12) located in the cylinder plug (10), serves in rotary mounting of the cylinder plug (10);

   the cylinder guide (14) is accommodated in axially fixed but rotatable manner in a housing (17), by which the cylinder guide (14) is mounted in the key-side area, while the other area of the cylinder guide (14) is surrounded by a sliding member (20) non-rotatable relative to the cylinder guide (14) but displaceable axially thereon, wherein the sliding member (20) is surrounded by a rotary member (40), which is rotatable relative to the sliding member (20) and may be moved axially synchronously therewith;

   a spring (33) supported in fixed manner relative to the housing acts axially on the rotary member (40) and thus on the sliding member (20) movable synchronously with the rotary member (40);

   an overload safety device (30) comprises a control profile (32) arranged on the housing (17) and a counter-control profile (31) arranged on the sliding member (20) and spring-loaded relative to the control profile (32), for axial movement of the sliding member (20) and of the rotary member (40) movable synchronously therewith in the event of overload, in order to release an axial coupling (50), the one coupling part (51) of which is fixed for rotation with the cylinder plug (10) and the other coupling part (52) of which is arranged on the rotary member (40).
2. A device according to claim 1, characterised in that, in the case of overload, the rotary member (40) is displaced axially by the sliding member (20) out of its starting position (53) into an advanced position (53'), in which the rotary member (40) is blocked with regard to rotation by surfaces fixed to the housing.
3. A device according to claim 1 or claim 2, characterised in that the rotary member (40) is arranged at least with part of its axial length radially outside the sliding member (20).
4. A device according to claim 3, characterised in that the rotary member (40) comprises a cylindrical portion (44) which is mounted rotatably on the sliding member (20).
5. A device according to one or more of claims 1 to 4, characterised in that the sliding member takes the form of a sliding sleeve (20), which surrounds the cylinder guide (14) annularly.
6. A device according to claim 5, characterised in that mutually complementary radial teeth (21) are arranged between the circumferential surface of the cylinder guide (14) on the one hand and the inner surface of the sliding sleeve (20) on the other hand, which radial teeth (21) produce axial guidance and non-rotatable connection of the sliding sleeve (20) on the cylinder guide (14).
7. A device according to one or more of claims 1 to 6, characterised in that the sliding member (20) and/or the rotary member (40) are arranged at least in places in that portion (29) of the cylinder plug (10) where the tumblers (12) are located.
8. A device according to one or more of claims 1 to 7, characterised in that the rotary member (40) under the axial spring loading (34) has at its inner end (25) an axial inner shoulder (45) which is supported on the inner end (25) of the sliding member (20), while the outer end (47) of the rotary member (40), facing the housing (17), is not supported.
9. A device according to one or more of claims 1 to 8, characterised in that the rotary member (40) has an axial receptacle (46) for a rotary pressure spring (33), which produces both the axial spring loading (34) of the overload safety device (30) and a restoring rotatory force for the rotary member (40),
   and in that the spring (33) is supported at one end on the rotary member (40) and at the other end on an end disk (22),
   and in that the end disk (22) is arranged in axially fixed manner relative to the cylinder plug (10) or the housing (17).

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