EP1389253A2

EP1389253A2 - Closing cylinder, in particular for motor vehicles

Info

Publication number: EP1389253A2
Application number: EP02727186A
Authority: EP
Inventors: Ales Capka; Simon Holub
Original assignee: FAB sro
Current assignee: Assa Abloy Rychnov sro
Priority date: 2001-05-22
Filing date: 2002-05-22
Publication date: 2004-02-18
Anticipated expiration: 2022-05-22
Also published as: SK13332003A3; US20040250579A1; EP1389253B1; CN1298957C; JP4225483B2; BR0209611A; ES2282058T1; KR100709441B1; BR0209611B1; PL205924B1; KR20040005952A; JP2004529282A; HUP0303726A3; CN1524152A; HUP0303726A2; ES2282058T3; PL363642A1; HU225253B1; RU2268978C2; RU2003136743A

Abstract

The invention relates to a closing cylinder, for motor vehicles in particular, comprising a housing (1). A cylinder core (2) equipped with a blocking channel (22) and spring-loaded tumblers (20,20') is arranged in an inner cylindrical cavity of said housing. When an incorrect key is inserted into the locking channel (22), the blocking protrusions (201) of the tumbler (20,20') engage with a locking groove (13,13') arranged in an element in which the cylinder core (2) is rotatably mounted. When the correct key is inserted, the blocking protusions (201) of the tumblers (20,20') do not go beyond the contour of the cylinder core. Said closing cylinder also has means for coupling the cylinder core (2) with an outlet element (3) when the cylinder core (2) is turned using the correct key and for decoupling the cylinder core (2) from the outlet element (3) of the closing cylinder when the cylinder core (2) is turned using an incorrect key or force. The invention is characterized in that the inner cylindrical cavity of the housing (1) has annular rotatable grooves (11), and in that at least one rib (12), which delimits said annular groove from a side that is located in a direction (o) opposite an axial displacement causing the decoupling of the cylinder core (2) and the outlet element (3), the flanks (130,131) of the blocking grooves extending oin the direction (o) of the axial displacement which causes the decoupling of the cylinder core (2) and the outlet element (3), is interrupted by at least one blocking groove (13), wherein the flanks (130,131) of the blocking grooves extend in the direction (o) of the axial displacement which causes the decoupling of the cylinder core (2) and the outlet element (3).

Description

Lock cylinders, in particular for motor vehicles

The invention relates to a locking cylinder, in particular for motor vehicles, whose cylinder core, which is provided with a key channel and spring-loaded tumblers, is coupled by means of an axial coupling to an outlet member of the locking cylinder when the cylinder core is rotated by means of a proper key, and is disengaged when the cylinder core is actuated by a wrong key ice or with a foreign object is forcibly rotated If the cylinder core is turned without authorization, the coupling is disengaged between the exit member of the lock cylinder, so that it is possible to rotate with the cylinder core of the lock cylinder without affecting a door lock bolt that is connected to the exit member of the lock cylinder is mechanically coupled

Locking cylinders of this type, in particular for motor vehicles, are known.The coupling or uncoupling of the cylinder core with the outlet member is usually carried out by an axial coupling which connects the outlet member of the locking cylinder to the cylinder core in the first end position of its axial displacement and that in the second end position of its axial displacement Exit member of the locking cylinder disengaged from the cylinder core

For example, from DE 43 16 223 AI and DE 196 04 350 AI lock cylinders of this type are known where in an inner cylindrical cavity of the housing an axially displaceable cage is rotatably mounted, in the cylindrical cavity of which a cylinder core with a key channel and spring-loaded tumblers If a proper key is not inserted into the key channel, the locking projections of the tumblers protrude beyond the outline of the cylinder core and engage in the locking grooves of the cage. In this state, the cylinder core is in a rotationally fixed connection with the cage and when the cylinder core is rotated, also rotated the cage in the housing Because an outer end of the cage is provided with a locking part with a lifting profile, which rests on a counter-locking part of the front end of the housing, when the cage is rotated, its position relative to the housing occurs due to the axial displacement of the cage s With this axial displacement, an axially adjustable coupling, which at the same time forms an outlet member of the locking cylinder, is pushed out of engagement with the cylinder core, causing it to The kinematic connection between the cylinder core and the exit member of the locking cylinder is interrupted, and then it is possible to turn the cylinder core without acting on the door lock bolt.

A disadvantage of such and similar constructions is that the use of the rotatable, axially displaceable cage prevents the formation of further security elements between the cylinder core and the housing of the locking cylinder and / or makes them considerably more expensive, such as a protective measure against tearing out or hammering in the cylinder core out or into the housing

From DE 44 10 783 CI a ring-like axially displaceable coupling is known, which contains on its inner forehead a driver recess for coupling with coupling projections on the axial extension of the cylinder core, and on its outer forehead has a locking projection which engages with a locking recess in the housing of the Lock cylinder is provided. This ring-like axially displaceable coupling is in a permanently rotationally fixed connection with the outlet member of the locking cylinder, wherein in the state disengaged from the cylinder core engages in the locking recess by means of the above-mentioned locking projection, whereby the outlet member of the locking cylinder is locked. A disengagement of this ring-like axially displaceable coupling from the cylinder core is carried out by means of a cage with a detent part on the end of the rotatably mounted cage in the housing of the locking cylinder with the lifting profile, which is carried along by the cylinder core when it is turned violently or unauthorized.The above lifting profile pushes the axially displaceable coupling out of the connection with the cylinder core against a force acting in the opposite direction of a coil spring and pushes it into a rotationally fixed connection with the locking recess in the housing of the locking cylinder.

If, after a violent attempt to open the lock cylinder with an authorized key, the cylinder core has to be rotated together with the cage into a starting position of the cylinder core, in which the mutual position of the locking part and counter-locking part on a cage face and on the facing forehead of the ring-like Clutch allows an axial jerk displacement of the clutch with the help of the mentioned axial coil spring, it being both for Disengaging from the housing as well as the rotationally fixed connection of the clutch to the cylinder core

A disadvantage of this axially displaceable coupling is its complicated and technically demanding axial guidance in the housing of the locking cylinder, the necessity to use the cage with the locking part for its axial displacement and also the use of a less reliable spring element for axially shifting the coupling back in engagement with the cylinder core

The above-mentioned disadvantages are essentially eliminated by a locking cylinder, in particular for motor vehicles, according to the preamble of the independent claim, the essence of which is that an inner cylindrical cavity of the housing is provided with rotatable annular grooves and at least one rib which defines the rotatable annular groove from one side limited, which is a direction of an axial displacement of the cylinder core, in which there is a clutch between the cylinder core and the outlet member, is interrupted by at least one locking groove, the locking groove flanks in the direction of the axial displacement of the cylinder core, in the case of which the clutch is disengaged the coupling between the cylinder core and the outlet member comes up

With this construction, one achieves a separation of the coupling between the cylinder core and the outlet member of the locking cylinder without using a cage between the cylinder core and the housing, which is a design of the safety measures against tearing and / or driving the cylinder core out of / into the housing on the cylinder core and allows on the case

It is advantageous if the housing is formed from two housing halves which are firmly connected to one another

This construction enables both a manufacturing-technically simple production of the rotatable ring grooves and the locking grooves in the ribs on the inner cylindrical cavity of the housing as well as a simple assembly of the locking cylinder

It is advantageous if the inner cylindrical cavity of the housing is provided with at least one support ring groove in which an outer collar of the cylinder core with an axial play (A) is arranged, wherein the axial play (a) corresponds to at least one length (b) of the axial displacement, which is necessary for the disengagement of the clutch. Such a construction essentially prevents the cylinder core from being torn out and / or knocked out of / into the housing.

It is advantageous if the locking grooves of the tumblers arranged in pairs are mutually arranged in the housing by 180.

Such a construction simplifies the manufacture of the locking cylinder and enables a sufficient number of locking combinations.

It is advantageous if the locking groove flanks are formed by flat surfaces which close the same acute angle (β) with a plane of symmetry of the locking groove. Such a construction simplifies both the manufacturing technology and ensures that the tumblers slide smoothly on the oblique locking groove flanks.

It is advantageous if the axial extension of the cylinder core is provided with a first axial stop, which clearly sets the first coupling elements of the driver in engagement with second coupling elements of the axial extension of the cylinder core, and the cylinder core with a second axial stop, which disengages the first coupling elements of the driver with the second coupling elements of the axial extension clearly sets, is provided. This construction enables the driver to be easily mounted in the housing in terms of production technology and its reliable axial feed both in engagement with the cylinder core and in engagement with the housing when using a minimal number of components of the locking cylinder.

It is advantageous if the second coupling elements are formed by a first radial recess and by an opposite second radial recess, which are formed in a collar on the axial extension, an annular groove being produced between the collar and an inner shoulder surface of the cylinder core, the first annular groove flank of which , which faces the inner shoulder surface, forms the second axial stop, the first coupling elements being formed by inner radial projections of the driver. This construction achieves both a minimum length of the cylinder core and a minimum length of the advance of the coupling elements in and out of a mutual engagement.

It is advantageous if a diameter of the axial extension at least behind the collar ring - larger than a diameter of a bottom of the annular groove, lies on the bottom of the annular groove, concave foreheads of the radial projections of the driver, the first radial recess in the axial extension at least to the bottom of the annular groove is sunk and its second annular groove flank facing the exit member forms the first axial stop, while the second radial recess is recessed into the axial extension below the bottom of the annular groove and is terminated from one side on the first annular groove flank, with a transition in the opposite direction into a second push-on groove Bottom is at a maximum distance (L) from an opposite surface of the axial extension, which is equal to the diameter (Dl) of the bottom of the annular groove. This construction enables both the components of the locking cylinder to be reduced to a minimum and the cylinder core to be easily produced by casting processes.

It is advantageous if the diameter (D2) of the axial extension behind the collar is equal to or smaller than the diameter (Dl) of the bottom of the annular groove and the first axial stop is provided by an end face of a safety washer or a collar or a nut that is free of play on the axial extension are arranged behind the collar, is formed. This construction is cheaper for machining the cylinder core by machining.

It is advantageous if a return spring is arranged in a blind bore in the axial extension.

This construction enables the length of the locking cylinder to be further shortened.

Some exemplary embodiments of the invention are shown on the accompanying drawings, in which the individual drawings show: 1. A longitudinal section through the parting plane of the lock cylinder (section BB of Fig.

3) with coupled coupling of the I. alternative, Fig. 2. a longitudinal section through the parting plane of the lock cylinder (section H-H from

Fig. 4) with the disengaged coupling of the I. alternative, Fig. 3. a view on cross section AA of Fig. 1 in the direction S, Fig. 4. a view on cross section FF of Fig. 2 in the direction S, Fig. 5. shows a section DD of Figure 3 of the front part of the lock cylinder with

Tumblers, Fig. 6. a section G-G of Figure 4 of the front part of the lock cylinder with the

Tumblers, Fig. 7. an axonometric view of essential parts of the disassembled lock cylinder according to I.Alternative, Fig. 8. a longitudinal section through the lock cylinder with the coupled clutch according to the

II. Alternative, Fig. 9. a longitudinal section through the lock cylinder with the disengaged coupling according to the II. Alternative, Fig. 10. a longitudinal section through the axial extension, Fig.11. a view of the axial extension of Fig.10, Fig.12. a section K-K of Fig.1 1,

Figure 13. a view of the axial extension of Figure 4 in the direction V, Fig.14. a section L-L through the driver from Fig.15, Fig.15. a side view of the driver,

Figure 16. a view of the driver from Fig.14 in the direction W, Fig.17. an axonometric view of the driver,

Figure 18. an axonometric view of a disassembled lock cylinder according to the II. alternative.

The first alternative is shown in the drawings in FIGS. 1 to 7 and the second alternative in the locking cylinder is shown in the drawings in FIGS. 8 to 18. The two alternatives I and II differ from one another in that the coupling 30, the driver 3J_ and the spring 4, 4 'are implemented in the same way.

As can be seen from the attached drawings, the locking cylinder consists of a housing 1, which is made up of two housing halves IM "which are firmly connected to one another. The division level J_4 of the two housing halves IM" is identical to the plane of symmetry Q of the locking grooves 13, 13 '. As is apparent from FIGS. 1 and 3, a cylinder core 2 with a key channel 22 and with tumblers 20, 20 ^'is arranged in an inner cylindrical cavity of the housing 1, which are mounted in the chambers 21 of the cylinder core 2. The tumblers 20, 20 'are cushioned and if no proper key is inserted into the key channel 22, the locking projections 201 of the tumblers 20, 20' protrude beyond the outline of the cylinder core 2 and engage in the locking grooves 13.13 ', which are in the ribs J2 in inner cylindrical cavity of the housing 1 are formed symmetrically along the division plane J_4 of the housing I. Locking projections 201 of the tumblers 20 engage in the locking grooves 13 and in the locking grooves 13 _. 'engage locking projections 201 ^{' of} the tumblers 20 ^' , which are pushed out in the opposite direction as the tumblers 20 by a spring force. The locking grooves 13.13 'are limited by locking groove flanks 130.131 which are formed on the end faces of the ribs 12. The locking groove flanks 130.131 enclose an acute angle β with the longitudinal plane of symmetry Q of the locking groove 13. The side surfaces of the locking projections 201, 201 'of the tumblers 20, 20' rest on the mentioned locking groove flanks 130, 131 when the cylinder core 2 is rotated or forcibly turned without an inserted key. If an orderly key is inserted into the key channel 22, the tumblers 20.20 'are arranged so that their locking projections 201.201' do not protrude beyond the outline of the cylinder core 2 and it is possible to rotate freely with the cylinder core 2 in the housing 1. When the cylinder core 2 is turned with the correct key, the outlet member 3 of the locking cylinder also becomes. which is coupled to the cylinder core 2 by a clutch 30 in this functional state. In the first alternative, the coupling 30 consists of second coupling elements 231 on an axial extension 23 and first coupling elements 301 on an axially non-movable driver 3J_, which is rotatably supported by its circumference in a cylindrical cavity in the housing 1 and in a permanent, rotationally fixed connection stands with the outlet member 3 of the lock cylinder. Of course, another embodiment of the coupling 30 is also conceivable, for example one in which the second coupling element 231 on the axial extension 23 engages directly in the first coupling element 301 on the axially non-displaceable outlet member 3. The exit member 3 of the lock cylinder is mechanically connected to a door lock bolt, not shown. If an improper key is inserted into the key channel 22, or if the cylinder core 2 is turned by force with the tumblers 20.20 'pushed out, the side surfaces of the locking projections 201.201' rest on the locking groove flanks 130 of the locking groove 13.13 '(see FIGS. 3 and 5 ) when the cylinder core 2 is rotated counterclockwise, and they rest on the locking groove flanks 131 when the cylinder core 2 is rotated clockwise. Because the locking groove flanks 130.131 are formed as oblique planar surfaces (see FIGS. 5 and 6), which expand in the direction O of the disengageable axial feed of the cylinder core 2 and form an acute angle β_ with the plane of symmetry Q_ of the locking grooves 13.13 ^' , it occurs at Rotation of the cylinder core 2 to slide the side surfaces of the locking projections 201, 201 ^' along the oblique surfaces of the locking groove flanks 130, 131 and to the axial displacement in the direction o. This also results in the axial displacement of the cylinder core 2, in whose chambers 21 the tumblers 20.20' are mounted are in the direction o. The tumblers 20.20 'are axially displaced as a result of the decomposition of the force FI (see FIG. 5) into a force component F3 perpendicular to the locking groove flank 130, and in the second force component F2 which causes an axial displacement of the tumblers 20.20 'in the direction o. The force _F. arises from the torque acting on the cylinder core 2 during the violent opening. During this axial displacement of the cylinder core 2, the feed by the feed length b, which corresponds to the length of the second coupling element 231 (see FIG. 2), results in the second coupling element 2 1 being pushed out on the axial extension 23 of the cylinder core 2 from the first Coupling element 301 on the driver 3_L The second coupling element 231 is pushed out against the force of a spring back 4 _^ which is in the form of a plate spring and it continues until the clutch 30 is disengaged, that is until the moment when the locking projections 201 slide from the oblique locking groove flanks 130.131 of the locking grooves 13.13 'into the rotatable ring grooves H (see FIG. 4). In this position, the clutch 30 is already disengaged between the cylinder core 2 and the outlet member 3 of the housing 1, so that upon further rotation of the cylinder core 2, in which, thanks to the guidance of the locking projections 201.201 'in the rotatable annular grooves H, the cylinder core 2 in the right Is held end position, the rotary movement of the cylinder core 2 is not transmitted to the outlet member 3 of the lock cylinder.

The side surfaces of the rotatable annular grooves 11 are formed by the side surfaces of the ribs 12, the end faces of which form the oblique locking groove flanks 130, 131. After the rotation of the cylinder core 2 by 180 °, when the protruding locking projections 201 of the tumblers 20.20 'come into congruence with the locking grooves 13.13', the cylinder core 2 is axially displaced back into the left starting position under the influence of the prestress of the spring back 4 and ^'3 for repeated coupling of the clutch 30 between the cylinder core 2 and the output member in this starting position of the lock cylinder is possible again it, after the insertion of the authorized key zuöfnen the lock cylinder in the key channel 22 or shut.

In the closed position of the locking cylinder (see Fig.l and Fig.5), in which the cylinder core 2 is in the left starting position and the coupling 30 is coupled, the first outer collar 251 formed on the cylinder core 2 sits on the left side surface of the rotatable Ring groove H, the right side surface of which is formed by the first rib 12, which delimits the first rotatable ring groove H on the left side. The second outer collar 252 formed on the cylinder core 2 is seated on the right side surface of the last rib 12, which delimits the last rotatable annular groove u on the right side. The two outer collars 251.252 are mounted in the safety grooves 151.152 with lateral axial play a, which is equal to or greater than the length of the axial feed b, which is necessary for pushing the second coupling element 23_1 out of the first coupling element 301. The outer collars 251.252 in this position prevent the cylinder core 2 from being torn out of the housing of the locking cylinder.

In the rotational position of the locking cylinder (see FIGS. 5 and 5), in which the cylinder core 2 is in the right end position and the clutch 30 is disengaged, the first outer collar 251 of the cylinder core 2 sits on the left side surface of the first rib 2 and the second outer collar 252 is seated on the right side surface of the second safety groove 152 in the housing 1. The outer collars 251.252 in this position first prevent the cylinder core 2 from slipping into the housing 1 and secondly prevent the screwing of a pull-out screw into the key channel 22 of the cylinder core 2 because the axial pressure on the pull-out screw, not shown, of the cylinder core 2 has shifted into its right-hand crank position becomes and turns, which prevents the screwing in of the pull-out screw mentioned.

Within the scope of the invention it is of course possible to design the widening locking groove flanks 130.131 differently than planar surfaces. It is essential that the surfaces must widen in the direction o of the disengagement-axial displacement of the cylinder core 2. It is of course also possible to manufacture a locking cylinder with a disengageable feed of the cylinder core 2 from right to left. In such a case, the oblique locking groove flanks 130.131 are oriented in the opposite direction and the cylinder core 2 will slide out axially in the opposite direction when turning with an improper key or when using force. The return spring 4 can also be replaced by a helical spring or by another spring element.

As can be seen from the drawings in FIGS. 8 to 18, on which the second implementation alternative of the locking cylinder is shown, the driver 3_1 with its outer jacket is rotatably and displaceably mounted in the inner cavity of the housing 1. The axial extension 23 of the cylinder core 2 runs through the driver 3_1, which by means of the driver recesses 314 is in a permanent, rotationally fixed connection with driver projections 315 of the outlet member 3 of the locking cylinder. If the cylinder core 2 is rotated without an inserted proper key or by force, the sliding of the locking projections 201 of the tumblers 20 along the oblique locking groove flanks 130.131 causes an axial displacement of the cylinder core 2 in the housing 1 against the force of the spring 4 designed in the form of a coil spring. In the first phase of this displacement, the second coupling elements 231 in the form of coupling projections are pushed out on the axial extensions 23 from the first coupling elements 301 in the form of coupling recesses in the driver 3J _. and further the second axial stop 26 is seated on the driver 3J_. This results in the clutch 30 being decoupled and thereby also the cylinder core 2 being decoupled from the outlet member 3. In the second phase of the displacement, as a result of the pressure effect of the second axial stop 26 of the cylinder core 2 on the driver 31, its further axial displacement occurs, as a result of which its non-rotatable connection with the housing 1 is created. This rotationally fixed connection arises as a result of the insertion of the locking projection 312 on the outer face of the driver 3J _. into the locking recess 16, which is located in the housing 1 of the locking cylinder. At the end of the second phase of the displacement of the cylinder core 2, as a result of the displacement of the locking projections 201 of the tumblers 20 from the splines 13 into the rotatable annular grooves ü, the cylinder core 2 is rotatably supported in the housing 1. With the The cylinder core 2 of the locking cylinder can now be rotated, but this rotation is no longer transmitted due to the disengagement of the clutch 30 to the driver 3J_, which is in this position in a rotationally fixed connection with the housing 1. Because the driver 3J_ is in a permanently rotationally fixed connection with the outlet member 3, it is also not possible to rotate with the outlet member 3, which is connected to a door lock bolt (not shown) by a mechanical bond (not shown). If the locking cylinder is to be brought back into the functional state in which the cylinder core 2 with the outlet member 3 can rotate with an inserted proper key, it is necessary to bring the cylinder core 2 into such a rotational position into which the locking projections 201 of the tumblers 20 from the rotatable ones Ring grooves H are pushed out and inserted into the locking grooves 13.13 'and then the spring 4 will push the cylinder core 2 back into its left starting position. In this starting position, the cylinder core 2 is again connected to the driver 31_ in a rotationally fixed manner by means of the coupling 30 and the driver 3_1 is disengaged from the housing 1.

The above-described axial displacement of the cylinder core 2 is composed of two phases again. In the first phase, the second coupling elements 231 of the axial extension 23 are inserted into the first coupling elements 301 of the driver 3J_ while the first axial stop 25 of the cylinder core 2 is placed on the driver 3J_, which causes the coupling 30 to be coupled. In the second phase, as a result of the pressure action of the first axial stop 25 of the cylinder core 2 on the driver 3_1, the driver 3J_ is forced to move back and thereby its locking projection 312 is pushed out of the locking recess 16 in the housing \.

As can be seen from FIGS. 3 to 6, the axial extension 23 of the cylinder core 2 emerges from the offset of the inner face 24 of the cylinder core 2, in which a blind axial bore 232 is formed for mounting the spring back 4 in the form of a coil spring. The prestressed spring 4 is arranged between the cylinder core 2 and the outlet member 3 and presses the cylinder core 2 into its starting position, into which the clutch 30 is coupled between the cylinder core 2 and the driver 3_1.

A collar ring 27 is arranged on the axial extension 23, in which a first radial recess 271 and a second radial recess 272 are formed. These two radial recesses 271.272 form the second coupling elements 231. into which the first coupling elements 301 of the driver 3_1 engage, which are formed by radial projections 301 '. Between the collar 27 and the inner face 24 of the cylinder core 2, an annular groove 28 is formed, the annular groove flank 281 facing the cylinder core 2 forming the second axial stop 26 for the driver 3_1. As can best be seen from FIGS. 10 and 13, the first radial recess 271 is formed in the collar 27 and engages in the radial direction in the axial extension 23 at least up to the level of the bottom of the annular groove 28, the first to the outlet member 3 facing side wall of the first radial recess 271 forms the first axial stop 25 of the cylinder core 2 for the driver 31. The second side wall of the first radial recess 271 lies in the plane of the annular groove flank 281 and forms the second axial stop 26 of the cylinder core 2. The second radial recess 272 is formed in the collar 27 opposite the first radial recess 271 and engages in the radial direction in the axial extension 23 below the level of the bottom of the annular groove 28 and its side wall facing the inner face 24 of the cylinder core 2 lies in the plane of the second annular groove flank 282 facing the outlet member 3. In other words, the second radial recess 272 does not engage in the bottom of the annular groove 28, and is terminated in an axial direction exactly on the boundary of the annular groove 28 and the collar groove 27, while in the second axial direction it merges into the second slip-on groove 233, which is for the Plugging the radial projection 301 'of the driver 3 onto the axial extension 25 of the cylinder core 2 is provided.

The radial projections 301 'of the driver 31, which form the first coupling elements 301, sit on the coupled coupling 30 with their side surfaces on the side surfaces of the first and second radial recesses 271 and 272 in the collar 27, which form the second coupling elements 231, the driver 3y _. is guided radially and axially through its outer cylinder jacket in the cylindrical cavity of the housing 1.

As can be seen from FIGS. 14 to 16 and FIG. 18, the driver 31 is designed as a ring with an outer cylindrical casing, in the forehead facing the outlet member 3 of which there is both a locking projection 312 that engages with the locking recess 16 in the housing 1 of the locking cylinder is determined, as well as driver recesses 314 for driving the projections 3J_5 of the outlet member 3. On the opposite end of the driver 31, an inner end ring 310 is formed, from which the first coupling elements 301 in the form of radial projections 301 ' protruding concave end faces 313. When the clutch 30 is disengaged, the concave end faces 31_3 sit on the bottom of the annular groove 28, in which the inner radial projections 301 ′ rotate when the cylinder core 2 is not rotated without authorization. Because the division between the concave end faces 3L3 the diameter DJ _. corresponds to the bottom of the annular groove 28, which is smaller than the diameter D2 of the axial extension 23 behind the 'collar 27, is the axial extension 23 by means of a second push-on groove 233. This adjoins the second radial recess 272 and is provided by an opposite first push-on groove 233' , The bottom of the second slip-on groove 233 is at a maximum distance L from the opposite surface of the axial extension 23 or from the bottom of the opposite first slip-on groove 233 ', which is equal to the diameter D_l of the bottom of the annular groove 28, so that it is during the assembly of the locking cylinder it is possible to plug the inner radial projections 301 'of the driver 3J_ onto the axial extension 23.

The embodiment described above enables simple manufacture of the cylinder core 2, the driver 3J _. and the housing 1 by injection molding, as well as a reduction in the number of components of the lock cylinder.

It is of course possible within the scope of the invention to carry out the first axial stop 25 on the axial extension 23 by other means, such as, for example, by an end face of a safety ring mounted in a safety groove behind the collar ring 27, or by stops attached to the axial extension 23 or with the help from an end face of a screw nut which is screwed onto the axial extension 23.

A locking cylinder according to the present invention can be used wherever it is necessary for it to retain its locking function even after an unauthorized violent manipulation, and where high resistance to the tearing and / or cracking of the cylinder core out of / or into the housing is required such as in motor vehicles. LIST OF REFERENCE NUMBERS

1 housing

I M "housing half

11 rotatable ring grooves

12 rib

13.13 'locking groove

130.131 ^' locking groove flank

14 division level

151 first safety groove

152 second safety groove

16 locking recess

2 cylinder core

20.20 'tumblers

201 locking projections. -

21 chambers

22 key channel

23 ^' axial extension

231 t second coupling element

232 blind axial bore

233 second slot

233 'first push-on groove

24 inner forehead

25 first axial stop

251 first outer waistband

252 second outer waistband

26 second axial stop

27 collar

271 first radial recess

272 second radial recess

28 ring groove

281 first ring groove flank (facing the cylinder core 2)

282 second ring groove flank (facing the outlet member 3)

3 exit link 30 clutch

301 first coupling element

301 'Radial projection

31 driver 310 inner front ring

312. \ ^' . locking projection

313 concave forehead (the inner radial protrusions)

314 driver recess

315 driver projections 4, 4 ^' spring back a game. b disengageable feed o direction of the disengagement movement

Q plane of symmetry of the locking groove 13 β angle between the locking groove flank 130, 131 and the plane of symmetry Q

D 1 diameter of the ring groove base

D2 diameter of the axial extension 23

L Mutual distance between the slip-on groove base

Claims

claims

1. Locking cylinder, in particular for motor vehicles, consisting of a housing, in the inner cylindrical cavity of which a cylinder core equipped with a key channel and spring-loaded tumblers is arranged, locking projections of the tumblers in a locking groove which are in a link when the proper key is not inserted in the key channel. in which the cylinder core is rotatably mounted, intervene and when the correct key is inserted, the locking projections of the tumblers do not protrude beyond the cylinder core outline, the locking cylinder further comprising means for coupling the cylinder core to an outlet member of the locking cylinder when the cylinder core is rotated by a proper key, and for Decoupling of the cylinder core from the outlet member of the lock cylinder, if the cylinder core is rotated by a wrong key or by force, is provided, characterized in that the inner cylindrical cavity of the housing (1) is provided with rotatable annular grooves (11) * and <d, at least one rib (12) which delimits the rotatable annular groove (11) from one side, which is a direction (o) of an uncoupling axial displacement of the cylinder core (2) from the outlet member (3) is opposite, interrupted by at least one locking groove (13), the locking groove flanks (130, 131) widening in the direction (o) of the disengagement axial displacement of the cylinder core (2) from the outlet member (3) ,

2. Lock cylinder according to claim 1, characterized in that the housing (1) is formed from two mutually firmly connected housing halves (1 ', 1 ").

3. Lock cylinder according to claim 1 or 2, characterized in that the inner cylindrical cavity of the housing (1) is provided with at least one support ring groove (151, 152) in which an outer collar (251, 252) of the cylinder core (2) with a axial play (a) is arranged, wherein the axial play (a) corresponds to at least one length (b) of the axial displacement which is necessary for the disengagement of the clutch (30).

4. Lock cylinder according to claim 1 or 2, characterized in that the locking grooves (13) for a pair of tumblers (20, 20 ') in the housing (1) are mutually arranged by 180 °.

5. Lock cylinder according to Anspmch 1 or 2, characterized in that the locking groove flanks (130, 131) are formed by flat surfaces which have the same acute angle (β) with a plane of symmetry (Q) of the locking groove (13).

6. Lock cylinder according to at least one preceding patent claim, characterized in that an axial extension (23) of the cylinder core (2) with a first axial stop (25), the first coupling elements (301) of the driver (31) in engagement with second coupling members (231) the axial extension (23) of the cylinder core (2) is clearly set, and the cylinder core (2) is provided with a second axial stop (26) which prevents the first coupling elements (301) of the driver (31) from engaging with the second coupling elements (231 ) the axial extension (23) clearly sets, is provided.

7. Lock cylinder according to Anspmch 6, characterized in that the second coupling elements (231) through a first radial recess (271) and through an opposite second radial recess (272) which are formed in a collar (27) on the axial extension (23) , are formed, between the collar

(27) and an inner shoulder surface (24) of the cylinder core (2) an annular groove (28) is produced, the first annular groove flank (281), which faces the inner shoulder surface (24), forms the second axial stop (26), the first coupling elements (301) are formed by inner radial projections (301 ^' ) of the driver (31).

8. Lock cylinder according to Anspmch 7, characterized in that a diameter (D2) of the axial extension (23) is at least behind the collar ring (27) larger than a diameter (Dl) of a bottom of the annular groove (28) on the bottom of the annular groove ( 28) of the radial projections (301 ') of the driver (31) are concave, the first radial recess (271) being sunk into the axial extension (23) at least to the bottom of the annular groove (28) and the outlet member (3 ) facing second annular groove flank (282) forms the first axial stop (25), while the second radial recess (272) into the axial extension (23) under the bottom of the annular groove

(28) is sunk and is terminated from one side on the first annular groove flank (281), with a transition in the opposite direction into a second push-on groove (233), the bottom of which is at most one from an opposite surface of the axial extension (23) Distance (L) is removed, which is equal to the diameter (Dl) of the bottom of the annular groove (28).

9. Lock cylinder according to Anspmch 7, characterized in that the diameter (D2) of the axial extension (23) behind the collar (27) is equal to or smaller than the diameter (Dl) of the bottom of the annular groove (28) and the first axial stop (25th ) by an end face of a safety washer or a lug or a nut, which are arranged on the axial extension (23) behind the collar ring (27) without play.

10. Lock cylinder according to Anspmch 7, characterized in that a spring (4) is arranged in a blind bore (232) of the axial extension (23).