Double locking cylinder

Abstract

In a double-lock cylinder, rotatable cores (2, 3) within a housing (1) are coupled to the locking bolt (4) in the direction of pull via balls (15). In the event of a manipulation attempt, the balls (15) create significant resistance against pulling out the core (2, 3). During operation, the balls (15) also reduce friction between a stationary core (2, 3) and the locking bolt (4).

Description

[0001] The invention relates to a double locking cylinder with two cores rotatable in a housing, with a locking bar driven by the cores, with a driver for rotationally fixed coupling of the locking bar with at least one of the cores, with a locking mechanism for selectively generating or releasing a positive locking connection of at least one of the cores with the housing in the direction of rotation, and with positive locking means for transmitting tensile forces from the cores to the locking bar.

[0002] From WO 2012 / 129615 A1, a double locking cylinder is known in which a ring element of the locking bolt has radially inwardly projecting projections that engage in grooves of the cores. This allows tensile forces to be transferred from the cores to the locking bolt. The locking bolt is designed in two parts for assembly, so that when the two parts of the locking bolt are joined, the projections engage in the grooves. This connects the locking bolt to the cores in the axial direction and allows it to be rotated relative to them. A disadvantage of this double locking cylinder is that the stability of the locking bolt is very low due to its two-part design.

[0003] From EP 0 874 113 A1, a double locking cylinder is known in which a locking bolt has three grooves for projections of two cores and a central body. This couples the cores and the central body to the locking bolt in the axial direction. However, the locking bolt is designed in two parts, resulting in only limited stability.

[0004] The invention is based on the problem of designing a double locking cylinder of the type mentioned above in such a way that it offers particularly high stability and high security against manipulation attempts.

[0005] This problem is solved according to the invention by the fact that the positive locking means have balls and that the balls are arranged in coaxially superimposed sections of the cores and the locking bar.

[0006] This design creates a positive fit between the locking bolt and the cores in the axial direction. This prevents the locking bolt and core from rotating relative to each other except in the direction of rotation, unless they are coupled via the drive element. The balls can transmit significant forces in the axial direction. They offer considerable resistance to any attempt to manipulate the locking bolt by pulling a core out of the housing. Furthermore, the cores, connected to the locking bolt via the balls, provide security against unauthorized unlocking even if the housing breaks. This results in exceptionally high stability for the double locking cylinder according to the invention. Additionally, the balls reduce friction during relative movement of one of the cores with respect to the locking bolt.

[0007] According to another advantageous embodiment of the invention, a ring element of the locking bolt, arranged coaxially to the ends of the cores, is manufactured in one piece to further increase the stability of the double locking cylinder.

[0008] According to another advantageous embodiment of the invention, the cores are able to transmit particularly high axial forces to the locking bar if each core has a bearing section and if the bearing sections are arranged coaxially to the ring element. Preferably, the cores are manufactured integrally with the bearing sections.

[0009] According to another advantageous embodiment of the invention, the double locking cylinder is particularly simple in design if the positive locking means on each of the cores have a ring of balls.

[0010] According to another advantageous embodiment of the invention, the production of the positive locking means is particularly simple if at least one of the components of the ring element of the locking bar or the cores has an annular channel for receiving the balls. This also keeps the friction between the locking bar and a stationary core particularly low, even in the direction of rotation.

[0011] According to another advantageous embodiment of the invention, friction between the balls can be avoided if a component of the ring element or the core opposite the annular channel has several individual recesses for receiving the balls. Preferably, the recesses are provided at uniform intervals.

[0012] According to another advantageous embodiment of the invention, the assembly of the balls between the locking bar and the cores is particularly simple if the locking bar has at least one feed channel for introducing the balls. This design allows the balls to be easily inserted into the space between the ring element of the locking bar and the core via the feed channel. This enables the ring element to have a particularly stable, closed shape. Preferably, the locking bar has a feed channel for each of the ring channels for introducing the balls. Preferably, the diameter of the feed channel is slightly larger than that of the balls, so that they can be inserted into the ring channel without friction.

[0013] According to another advantageous embodiment of the invention, the balls falling out can be easily prevented if the feed channel is closed by a sealing element. The sealing element can be designed as a plug of virtually any shape.

[0014] According to another advantageous embodiment of the invention, the intended position of the balls in the double locking cylinder can be easily ensured if the locking element has the same length as the feed channel. This design ensures that the locking element is reliably positioned relative to the balls when its free end is flush with the outer surface of the locking bolt. This reliably prevents the balls from falling back into the locking channel after the locking element has been installed.

[0015] According to another advantageous embodiment of the invention, further simplifying the assembly of the balls is achieved if the feed channel is guided by a locking lug of the locking bar that projects from the ring element. This allows the feed channel to be easily rotated into a desired position.

[0016] According to another advantageous embodiment of the invention, the feed channel has a sufficient length for mounting the locking element if the feed channel extends from the center of the free end of the locking bolt nose to the annular channel. Furthermore, this largely prevents weakening of the locking bolt nose of the locking bolt.

[0017] According to another advantageous embodiment of the invention, increasing stability while simultaneously simplifying assembly is achieved by using a spring steel spring pin as the locking element. Such spring pins are also frequently referred to as spring sleeves and are readily available and inexpensive. For assembly, the spring pins can simply be pressed into the feed channel.

[0018] The invention allows for numerous embodiments. To further illustrate its basic principle, one of these is shown in the drawing and described below. This shows in Fig. 1 shows a longitudinal section through a double locking cylinder, Fig. 2 shows a cross-section through the double locking cylinder made of Figure 1 along line II - II, Fig. 3 a locking bar with balls arranged therein of the double locking cylinder made of Figure 1in an enlarged perspective view, Fig. 4 a core of the double locking cylinder in an enlarged perspective view.

[0019] Figure 1 Figure 1 shows a double cylinder lock with two cores 2, 3 rotatable within a housing 1 and a locking bolt 4 driven by the cores 2, 3. Drivers 5 are arranged within the locking bolt 4, which can be actuated by a key (not shown) inserted into locking channels 6, 7 of the cores 2, 3. The drivers 5 allow the cores 2, 3 to be coupled to the locking bolt 4 in a rotationally fixed manner. The cores 2, 3 each have a locking mechanism 8, 9 formed by pin tumblers for selectively creating or releasing a positive locking connection between the respective core 2, 3 and the housing 1. The cores 2, 3 each have a bearing section 10, 11 arranged concentrically to a ring element 12 of the locking bolt. A locking bolt nose 13 projects radially from the ring element 12.

[0020] The respective locking mechanism 8, 9 for selectively generating or releasing a positive lock between the respective core 2, 3 and the housing 1 can, in addition to the mechanical pin tumblers for a mechanical key shown in this embodiment, also be implemented electronically or semi-electronically, in which, for example, an electronic key medium controls an actuator that selectively generates or releases the positive lock. Likewise, the drivers 5 can also be controlled electronically or semi-electronically.

[0021] The bearing sections 10, 11 of the cores 2, 3 are connected to the locking lug via force-absorbing positive locking elements 14 in the tensile direction. The positive locking elements 14 have a ring of balls 15 in the manner of an axial or radial bearing. The ring element 12 has radially inwardly open annular channels 16 for receiving the balls 15. Figure 2in a cross-sectional view through the double locking cylinder Figure 1 As shown, the bearing sections 10 of the cores 2 each have a ring of radially outwardly open recesses 17 for receiving the balls 15.

[0022] Figure 3Figure 1 shows the locking bar 4 with the balls 15 in an enlarged perspective view. The locking bar 4 has feed channels 18 that extend to the annular channels 16. The feed channels 18 are closed by locking elements 19. The locking elements 19 are cylindrical pins. In an alternative embodiment not shown, the locking elements 19 can also be designed as spring pins or spring sleeves. The locking elements 19 have the same length as the feed channels 18, so that, with a flush finish at the free end of the locking bar nose 13, they extend to the edge of the annular channels 16. Thus, the locking elements 19 close the feed channels 18 and do not impede the rolling or sliding of the balls 15.

[0023] Figure 4 shows one of the cores 2, 3 of the double locking cylinder. Figure 1in an enlarged perspective view. The ring of recesses 17 for the balls 15 in the bearing section 10 can be seen. Furthermore, a drive recess 20 for one of the in is visible in the bearing section 10. Figure 1 The illustrated driver 5 is shown for rotationally fixed coupling with the locking bar 4.

[0024] To assemble the double locking cylinder, after inserting the locking bolt 4 into the housing 1, the cores 2, 3 and the components of the drive pins 5 are mounted. The balls 15 are then inserted into the recesses 17 and the annular channels 16 via the feed channels 18 while rotating the locking bolt 4. In the simplest case, this is done using gravity and / or compressed air. The balls 15 can be guided to the free end of the feed channels 18 via a hose. The feed channels 18 are closed using the locking elements. The locking mechanisms 8, 9 can then be mounted.

Claims

1. Double locking cylinder with two cores (2, 3) rotatable in a housing (1), with a locking bolt (4) driven by the cores (2, 3), with a driver (5) for rotationally fixed coupling of the locking bolt (4) with at least one of the cores (2, 3), with a locking mechanism (8, 9) for selectively generating or releasing a positive locking connection of at least one of the cores (2, 3) with the housing (1) in the direction of rotation, and with positive locking means (14) for transmitting tensile forces from the cores (2, 3) to the locking bolt (4). characterized by the fact that the positive locking means (14) have balls (15) and that the balls (15) are arranged in coaxially superimposed sections of the cores (2, 3) and the locking bar (4).

2. Double locking cylinder according to claim 1, characterized by the fact that a ring element (12) of the locking bar (4) arranged coaxially to the ends of the cores (2, 3) is manufactured in one piece.

3. Double locking cylinder according to claim 2, characterized by the fact thatthe cores (2, 3) each have a bearing section (10, 11) and the bearing sections (10, 11) are arranged coaxially to the ring element (12).

4. Double locking cylinder according to at least one of claims 1 to 3, characterized by the fact that the form-fitting means (14) have a ring of balls (15) on each of the cores (2, 3).

5. Double locking cylinder according to claim 4, characterized by the fact that at least one of the components of the ring element (12) of the locking bar (4) or of the cores (2, 3) has a ring channel (16) for receiving the balls (15).

6. Double locking cylinder according to claim 5, characterized by the fact that a component of the ring element (12) or of the core (2, 3) opposite the ring channel (16) has several individual recesses (17) for receiving the balls (15).

7. Double locking cylinder according to at least one of claims 4 to 6, characterized by the fact that the locking bar (4) has at least one feed channel (18) for introducing the balls (15).

8. Double locking cylinder according to claim 7, characterized by the fact that the feed channel (18) is closed by a closure element (19).

9. Double locking cylinder according to claim 8, characterized by the fact that the closure element (19) has the length of the feed channel (18).

10. Double locking cylinder according to at least one of claims 8 or 9, characterized by the fact that the feed channel (18) is guided through a locking bar nose (13) of the locking bar (4) which protrudes from the ring element (12).

11. Double locking cylinder according to at least one of claims 8 or 9, characterized by the fact that the feed channel (18) extends from the center of the free end of the locking bar nose (13) to the ring channel (16).

12. Double locking cylinder according to at least one of claims 8 to 11, characterized by the fact that the locking element (19) is a spring steel tension pin.

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