Connection Between a Shifting Element and a Shift Track Selection Rod

Abstract

A shift track selection rod and a shifting element are provided which can be connected to one another without additional fastening elements. A system consists of the shift track selection rod and the shifting element. A transmission actuator includes the system. A transmission includes the system or the transmission actuator.

Claims

1.-12. (canceled)

13. A shift track selection rod configured for mounting a shifting element, comprising: an axis and a connection geometry of the shift track selection rod, wherein the axis and the connection geometry are configured for fixing the shifting element via a form-fit at a position along the axis.

14. The shift track selection rod as claimed in claim 13, wherein the connection geometry is designed to come into engagement with a correspondence geometry of the shifting element in order to form the fixing along the axis, and the connection geometry is configured as a depression and/or protrusion in and/or on the shift track selection rod.

15. The shift track selection rod as claimed in claim 13, wherein the connection geometry is configured as a cam, protuberance, tongue, lug or groove, and/or the connection geometry is designed to be inserted in an opening of the correspondence geometry.

16. The shift track selection rod as claimed in claim 14, wherein at least one of: (i) the connection geometry is designed to come into engagement with the correspondence geometry by way of a rotation of the shift track selection rod about the axis relative to the correspondence geometry and form the fixing, (ii) the connection geometry is configured so as not to hinder a rotational movement of the shifting element about the axis of the shift track selection rod, at least over an angular range, without the fixing being released along the axis, or (iii) the shift track selection rod is designed to be provided, rotationally fixedly about its axis, in a transmission actuator.

17. A shifting element which is designed to be fixed onto a shift track selection rod along an axis of the shift track selection rod, comprising: a correspondence geometry of the shifting element, wherein the correspondence geometry is configured for fixing the shifting element at a position along the axis of the shift track selection rod.

18. The shifting element as claimed in claim 17, wherein the correspondence geometry is designed to come into engagement with a connection geometry of the shift track selection rod in order to form the fixing along the axis, and wherein at least one of: (i) the correspondence geometry is configured as a depression and/or a protrusion in and/or on the shifting element, or (ii) the correspondence geometry is configured as a complementary geometry which is configured to block the shifting element with the connection geometry by way of a geometry adapted to the connection geometry.

19. The shifting element as claimed in claim 17, wherein one of: the correspondence geometry is configured as a cam, protuberance, tongue, lug or groove, or the correspondence geometry has an opening which is configured for receiving the shift track selection rod, wherein the opening is designed as a through-hole.

20. The shifting element as claimed in claim 17, wherein at least one of: (i) the correspondence geometry is designed to come into engagement with the connection geometry by way of a rotation about the axis relative to the connection geometry, and form the fixing, or (ii) the correspondence geometry is configured so as not to hinder a rotational movement of the shifting element about the axis of the shift track selection rod, at least over an angular range, without the fixing being released along the axis.

21. The shifting element as claimed in claim 17, wherein the shifting element is configured as a shift finger, and/or is designed to be provided in a transmission actuator.

22. A system, comprising: a shift track selection rod configured for mounting a shifting element, wherein the shift track selection rod has an axis and a connection geometry which are configured for fixing the shifting element via a form-fit at a position along the axis, and the shifting element, which is designed to be fixed onto the shift track selection rod along the axis of the shift track selection rod, wherein the shifting element has a correspondence geometry which is configured for fixing the shifting element at a position along the axis of the shift track selection rod, wherein the system is designed for installation in a transmission actuator.

23. A transmission actuator comprising a system as claimed in claim 22, wherein the transmission actuator is designed to operate at least one gear selector element of a transmission by way of the shifting element.

24. A manual transmission comprising a system as claimed in claim 22, wherein the manual transmission is configured such that at least one gear selector element of the manual transmission is operated by way of the shifting element of the system.

25. A manual transmission comprising a transmission actuator, wherein the transmission actuator comprises a system as claimed in claim 22, and the transmission actuator is designed to operate at least one gear selector element of a transmission by way of the shifting element.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG. 1a is a general sectional view of a shift track selection rod according to an embodiment of the invention and a shifting element according to an embodiment of the invention during a first installation step.

[0040] FIG. 1b shows the same configuration as in FIG. 1a from a second viewing direction.

[0041] FIG. 2a shows the same configuration, in the same viewing direction, as in FIG. 1a during a second installation step.

[0042] FIG. 2b shows the same configuration as in FIG. 2a from a third viewing direction.

DETAILED DESCRIPTION OF THE DRAWINGS

[0043] FIG. 1a shows a general sectional view of a shift track selection rod 1 and a shifting element 2 during a first mounting step, and FIG. 1b shows this mounting step from the viewing direction BR1 indicated, i.e. rotated by 90° relative to the illustration from FIG. 1a.

[0044] A shift track selection rod 1 is shown which has an axis 6. The shift track selection rod 1 and axis 6 are oriented from left to right in the illustration shown. On its periphery, the shift track selection rod 1 has a connection geometry 3 which has a maximum elevation 4 having the greatest distance from the axis 6.

[0045] Furthermore, a shifting element 2 is shown in sectional depiction. The shifting element 2 has a correspondence geometry 7 formed inside the shifting element 2. The shifting element 2, in particular the correspondence geometry 7, has an opening 5 in which the shift track selection rod 1, in particular the connection geometry 3, is inserted. The opening 5 is here configured as a through-hole so that the shift track selection rod 1 penetrates the shifting element 2 through the opening 5. The opening 5 is formed as part of the correspondence geometry 7 in the embodiment shown.

[0046] In FIG. 1a, the opening 5 has a greater inner diameter on the right-hand side of the shifting element 2 than on the left-hand side of the shifting element 2. This inner diameter does not extend rotationally symmetrically about the axis 6. In FIG. 1b, which is rotated by 90° relative to FIG. 1a, the opening 5 has the same smaller inner diameter on the right-hand side of the shifting element 2 as on the left-hand side.

[0047] The correspondence geometry 7 inside the shifting element 2 is furthermore configured such that the connection geometry 3, in particular the maximum elevation 4, may rotate unhindered therein about the axis 6. The smaller diameter of the opening 5 is configured so as to block a displacement of the connection geometry 3, in particular the maximum elevation 4, parallel to the axis 6. A displacement of the connection geometry 3, in particular the maximum elevation 4, parallel to the axis 6 is only possible if the connection geometry 3, in particular the maximum elevation 4, is aligned with the greater diameter of the opening 5.

[0048] The installation of the shift track selection rod 1 and shifting element 2 is described below.

[0049] For installation, the shift track selection rod 1, as shown in FIG. 1a, is inserted in the opening 5 of the shifting element 2 in the direction of an indicated movement X. The shift track selection rod 1 is here oriented relative to the shifting element 2 such that the maximum elevation 4 can be guided through the larger diameter of the opening 5.

[0050] Towards the end of the movement X, the shift track selection rod 1 and shifting element 2 are oriented as shown in FIGS. 1a and 1b. Then a movement of the shift track selection rod 1 and shifting element 2 in the direction of the axis 6 is blocked. This is shown in FIGS. 2a and 2b. FIG. 2a has the same viewing direction as FIG. 1a. FIG. 2b furthermore shows a second view, rotated by 90°, of the configuration in FIG. 2a from viewing direction BR2.

[0051] Locking takes place by a rotation Y of the shift track selection rod 1 relative to the shifting element 2. In the resulting orientation of the shift track selection rod 1 and shifting element 2, the maximum elevation 4 of the connection geometry 3 is oriented relative to the correspondence geometry 7 such that a movement of the shift track selection rod 1 relative to the shifting element 2 parallel to the axis 6 is not possible. The smaller inner diameter of the opening 5 in connection with the maximum elevation 4 thus blocks the relative movement between the shift track selection rod 1 and shifting element 2 along the axis 6.

[0052] The resulting connection between the shift track selection rod 1 and the shifting element 2 thus fixes the shifting element 2 on the shift track selection rod 1 in the direction of the axis 6, wherein at the same time, the shifting element 2 is rotatable about the shift track selection rod 1. The connection can only be released in the direction of the axis 6 when the maximum elevation 4 is congruent with the larger inner diameter of the opening 5.

[0053] On use of such a system of shift track selection rod 1 and shifting element 2 for operating a transmission, it must merely be ensured that the shifting element 2, which is rotated about the axis 6 of the shift track selection rod 1 in order to perform a shift, travels only through angular positions which exclude a congruence of the maximum elevation 4 and the larger diameter of the opening 5. Therefore on use of this system, complete rotation of the shifting element 2 about the axis 6 must not be permitted.

[0054] The use of this system in a transmission is described below.

[0055] The system is provided in a transmission such that a shift track may be selected and then a shift made within the transmission. On shift track selection, a corresponding gear selector element of the transmission is selected and then transferred to a selection position by means of a shift. The system may be provided directly in the transmission or in a transmission actuator which is designed for operating the transmission.

[0056] For shift track selection, an actuator is provided which is designed to displace the system such that the shifting element 2 comes into engagement with a corresponding gear selector element. The displacement may for example take place linearly along the axis 6. Alternatively or additionally, the shift track may be selected by means of rotation of the system, for example about an axis which in FIG. 1a is oriented perpendicularly to the drawing plane.

[0057] For shifting, a further actuator is provided which is configured such that, after shift track selection, the shifting element 2 is rotated about the axis 6 of the shift track selection rod 1. The rotational movement causes outward pivoting of an end of the shifting element 2 which is in engagement with the corresponding gear selector element. In this way, the gear selector element is transferred to a selection position. Shifting is complete.

[0058] As actuators, for example electric motors or pneumatic actuators or other suitable devices may be provided which may exert a force on system.

[0059] The invention is not restricted to the embodiments described above. Rather, further embodiments may be formed by combination of different features of the individual embodiments. Also, individual features may be modified. For example, the opening 5 of the correspondence geometry 7 may also be configured without a through-hole. Instead, merely a blind hole may be formed, wherein then the shift track selection rod 1 can no longer be guided through the shifting element 2. It is also conceivable to design the correspondence geometry 7 completely without an opening 5. Instead, the correspondence geometry 7 could for example be formed on the surface of the right-hand side of the shifting element 2 in FIG. 1a, wherein the correspondingly formed connection geometry 3 is configured to form a connection according to the invention with the correspondence geometry 7.

[0060] In addition, the design of the connection geometry 3 as a peripheral thickening of the shift track selection rod 1 with a maximum elevation 4 is not absolutely necessary. Embodiments are also conceivable which have a connection geometry 3 in the form of a depression, for example a partially circumferential groove. The correspondence geometry 7 of the shifting element 2 is then formed accordingly as a protuberance, for example as a tongue within the opening 5 which engages in the circumferential groove. Mounting here takes place for example in that the tongue of the shifting element 2 is brought into engagement with a groove of the shift track selection rod 1 which extends parallel to the axis 6 and runs out at one end of the shift track selection rod 1. From this end, the shifting element 2 with its tongue may be push-fitted onto the shift track selection rod 1 and moved along this groove up to the position along the axis 6 at which it is to be fixed. At this position, the partially circumferential groove adjoins the groove which runs parallel to the axis 6. When the tongue has reached the position, fixing takes place again by a rotation Y. The remaining function of the shift track selection rod 1, shifting element 2 or a system of the two, is identical to the embodiment described above.

LIST OF REFERENCE SIGNS

[0061] 1 Shift track selection rod [0062] 2 Shifting element [0063] 3 Connection geometry [0064] 4 Maximum elevation [0065] 5 Opening [0066] 6 Axis [0067] 7 Correspondence geometry [0068] BR1 Viewing direction [0069] BR2 Viewing direction [0070] X Movement [0071] Y Rotation