Securing device for securing a stationary state of an electric vehicle

Abstract

A securing device for securing a stationary state of an electric vehicle includes a gearshift interlock device and a differential interlock device. The gearshift interlock device has a gearshift interlock drive with a gearshift interlock shaft for driving a gearshift interlock between a gearshift interlock position and a gearshift release position. The differential interlock device has a differential interlock drive with a differential interlock shaft for driving a differential interlock between a differential interlock position and a differential release position. The gearshift interlock shaft and the differential interlock shaft are connected to one another in a drive-transmitting fashion.

Claims

1. A securing device for securing a stationary state of an electric vehicle, said securing device comprising: a gearshift interlock device having a gearshift interlock drive with a gearshift interlock shaft for driving a gearshift interlock means between a gearshift interlock position (GS) and a gearshift release position (GF), a differential interlock device having a differential interlock drive with a differential interlock shaft for driving a differential interlock means between a differential interlock position (DS) and a differential release position (DF), wherein the gearshift interlock shaft and the differential interlock shaft are connected to one another such that movement of the gearshift interlock shaft is transmitted to the differential interlock shaft.

2. The securing device as claimed in claim 1, wherein the differential interlock means has a differential interlock section which, in the differential interlock position (DS), is configured to be positively locked in an opposing differential interlock section.

3. The securing device as claimed in claim 1, wherein the gearshift interlock means and/or the differential interlock means have/has a spring compensation means.

4. The securing device as claimed in claim 1, wherein the gearshift interlock device acts on an input transmission or multi-gear transmission.

5. The securing device as claimed in claim 1, wherein the gearshift interlock shaft and/or the differential interlock shaft have/has a coupling section for coupling the gearshift interlock drive to the differential interlock drive, via the gearshift interlock shaft and/or the differential interlock shaft.

6. The securing device as claimed in claim 1, wherein the gearshift interlock device and/or the differential interlock device have/has a freewheeling section for freewheeling of the gearshift interlock shaft and/or of the differential interlock shaft counter to a drive direction.

7. The securing device as claimed in claim 1, wherein a drive of the gearshift interlock means is embodied as an electromechanical or hydraulic drive.

8. The securing device as claimed in claim 1, wherein a drive of the differential interlock means is an electromechanical or hydraulic drive.

9. An electric vehicle comprising the securing device of claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages, features and details of the invention emerge from the following description in which exemplary embodiments of the invention are described in detail with reference to the drawings. Here the features which are mentioned in the claims and in the description are each individually essential to the invention per se or in any desired combination. In the drawings, in each case in a schematic form:

(2) FIG. 1 shows an embodiment of a securing device according to aspects of the invention,

(3) FIG. 2 shows the embodiment in FIG. 1 in a lateral illustration,

(4) FIG. 3 shows the embodiment in FIGS. 1 and 2 on an electric vehicle,

(5) FIG. 4 shows the embodiment in FIG. 3 in a lateral illustration,

(6) FIG. 5 shows a partial detail of the embodiment in FIGS. 3 and 4,

(7) FIG. 6 shows the embodiment in FIG. 5 in the differential interlock position,

(8) FIG. 7 shows the embodiment in FIGS. 3 to 6 in an isometric illustration of a detail,

(9) FIG. 8 shows the embodiment in FIG. 7 in a lateral illustration, and

(10) FIG. 9 shows a schematic illustration of the securing device according to aspects of the invention.

DETAILED DESCRIPTION OF THE INVENTION

(11) FIGS. 1 and 2 show schematic views of a securing device 10 according to aspects of the invention. The latter is provided with two separate drives, specifically the gearshift interlock drive 22 and the differential interlock drive 42. The gearshift interlock drive 22 and the differential interlock drive 42 are respectively embodied either as an electromechanical actuator or hydraulic actuator. Therefore, a gearshift interlock device 20 and a differential interlock device 40 are formed. For the method of functioning, the two shafts, specifically the gearshift interlock shaft 24 and the differential interlock shaft 44 have a drive connection to one another via a respective coupling section 25 and 45. The coupling of the gearshift interlock drive 22 to the differential interlock drive 42 provides a redundant mode.

(12) Now, in order to engage a securing situation, that is to say to secure the drive wheels, at least one of the two drives 22 and 42 is switched on. In the normal mode, both the gearshift interlock drive 22 and the differential interlock drive 42 are switched on in order to generate the respective interlock movement. This movement is in both cases here a rotational movement which is output via the gearshift interlock shaft 24 and the differential interlock shaft 44. The corresponding interlock movement acts here in each case in a redundant fashion via the two coupling sections 25 and 45, on the one hand on the gearshift interlock means 26 and on the other hand on the differential interlock means 46. Both the gearshift interlock means 26 and the differential interlock means 46 are embodied here to perform positively locking engagement in order to make available the corresponding interlock function. In FIG. 2, the lighting projections or nose projections of the differential interlock section 48 of the differential interlock means 46 can already be seen. A failure of one of the two drives 22 and 42 has occurred, so that the respectively still intact drive 22 or 42 can move both interlock means, that is to say the gearshift interlock means 26 and the differential interlock means 46 only into the respective interlock position through the coupling via the coupling section 25 and 45.

(13) In FIG. 1, the movement of the arrow also indicates the respective direction of movement out of the differential release position DF into the differential interlock position DS or out of the gearshift release position GF into the gearshift interlock position GS.

(14) FIGS. 3 and 4 show schematically the attachment to an electric vehicle 100, here with a multi-gear transmission 110. The method of functioning corresponds to that described with respect to FIGS. 1 and 2. Correspondingly, a force path KP starting from the drive wheels is illustrated in FIG. 4. This force path KP conducts the force which is applied into the multi-gear transmission 110 by, for example, the drive wheels by the downgrade force when the vehicle is parked on a slope. This force along the force path KP is then supported doubly, specifically, on the one hand, within the multi-gear transmission 110 at the gearshift interlock means 26 of the gearshift interlock device 20 and, on the other hand, at the differential interlock means 46 of the differential interlock device 40.

(15) The interlock effect of the differential interlock means 46 is also illustrated well in FIGS. 5 and 6. While FIG. 5 shows the differential release position, the respective differential interlock section 48 of the differential interlock means 46, here embodied as a spline shaft, is latched into the respective opposing differential interlock section 50 in FIG. 6 in the differential interlock position DS.

(16) FIGS. 7 and 8 show the integration into the electric vehicle 100, which said FIGs. also show the compact design. In particular, the existing gearshift interlock drive 22 is also used for a securing device 10 according to aspects of the invention so that only the differential interlock device 46, and there mainly the differential interlock drive 42, have to be integrated as additional components into the electric vehicle 100.

(17) Finally, FIG. 9 shows the securing device 10 for securing a stationary state of an electric vehicle 100 in a schematic configuration. The securing device 10 is composed, on the one hand, of a gearshift interlock device 20 and a differential interlock device 40, wherein the gearshift interlock device 20 has an electromechanical or hydraulic gearshift interlock drive 22 with a gearshift interlock shaft 24 which is responsible for driving a gearshift interlock means 26 between a gearshift interlock position GS and a gearshift release position GF. The differential interlock device 40 also has an electromechanical or hydraulic differential interlock drive 42 with a differential interlock shaft 44 which ensures the driving of differential interlock means 46 between a differential interlock position DS and a differential release position DF. In order to generate a redundant arrangement, the gearshift interlock shaft 24 and the differential interlock shaft 44 are connected to one another in a drive-transmitting fashion, which is illustrated schematically in FIG. 9 by the reference symbol 60.

(18) The above explanation of the embodiments describes the present invention exclusively within the scope of examples. Of course, individual features of the embodiments can, where technically appropriate, be freely combined with one another without departing from the scope of the present invention.