Block-like Electric Drive Providing Dual Single-wheel Drives with Parking Locks

Abstract

A block-like electric drive providing two single-wheel drives on one axle comprises two electric machines, each having a parallel rotor axis and a transmission on an end face. The single-wheel drives or the electric machines are arranged at least partially congruent with each other in a longitudinal vehicle direction for installation. A respective inverter serves to actuate each one of the two electric machines, the inverters being arranged next to each other at a highest point of the drive block in the installation position. The two electric machines are arranged one behind the other with regard to their housings. The drive block thus has two drives with separate transmission housings. Each drive can advantageously be equipped with a parking lock for blocking an output shaft. A locked state can thus be created in each drive combination.

1 - 15 . (canceled) 
     
     
         16 . A drive block of an electric motor-driven motor vehicle drive for two single-wheel drives on one common axle,
 comprising a first electric machine, which has a first rotor axis, and   comprising a first transmission arranged on an end face of the first electric machine, and   comprising a second electric machine, which has a second rotor axis, and   comprising a second transmission arranged on an end face of the second electric machine,   which are arranged at least partially congruent with each other in a longitudinal vehicle direction for installation, and   which are configured for transverse installation in a motor vehicle,   wherein the drive block has two inverters, each respective inverter prepared for actuating one of the two electric machines,   wherein the two inverters are arranged at a highest point of the drive block while being in an installation orientation and at least one of the inverters, which is arranged next to the other inverter, is designed as a shallow, almost square box and with its box shape forms approximately one half of an upper side of the drive block, and   wherein the two electric machines are arranged in parallel with regard to their rotor axes and one behind the other with regard to their housings, as a result of which the drive block is composed of two L-shaped motor/transmission units having separate transmission housings.   
     
     
         17 . The drive block according to  claim 16 , wherein the two inverters together form the upper side of the drive block, one of the inverters covers a right-hand side of the electric machines arranged one behind the other, as a shallow unit spanning the latter. 
     
     
         18 . The drive block according to  claim 16 , wherein one inverter rests on a support plate, which is configured as a flat cover plate across both electric machines. 
     
     
         19 . The drive block according to  claim 16 , wherein one of the inverters has a cable connection adapter by which a connector positioning is predefined at a point on a longitudinal extent or a point on a width of one of the electric machines. 
     
     
         20 . The drive block according to  claim 19 , wherein each of the inverters has its own cable connection adapter as an electrical transmission means placed on a side, the connector positioning of which is placed in each case at a point on the longitudinal extent of the cable connection adapter such that an equal distance is obtained between each connector positioning and an energy source. 
     
     
         21 . The drive block according to  claim 19 , wherein a first current path length, which is provided for a length of a first connection cable and a cable routing in a first cable connection adapter, and a second current path length, which is provided for a length of a second connection cable and a cable routing in a second cable connection adapter, match each other as a result of cable routings providing a compensation between different lengths for the first and second connection cables. 
     
     
         22 . The drive block according to  claim 19 , wherein a cable connection adapter has multiple connectors or connector positions, to which a connection cable can be connected. 
     
     
         23 . The drive block according to  claim 16 , wherein one of the transmission housings is attached to an edge side of the drive block and has an elliptical, sloping, groundwardly directed profile with two foci, one of said foci being used for a wheel output shaft. 
     
     
         24 . The drive block according to  claim 16 , wherein the transmission housings, in the region of a lowest point of the drive block, extend further into an area close to the ground than a lowest point of the electric machines. 
     
     
         25 . The drive block according to  claim 16 , wherein at least one of the inverters is equipped with a plurality of upwardly projecting cooling fins. 
     
     
         26 . The drive block according to  claim 16 , wherein the two inverters are adjacently arranged on an upper side of the drive block and are placed in a manner rotated relative to each other about their housing vertical axes. 
     
     
         27 . The drive block according to  claim 16 , wherein each of the inverters is connected via at least one of:
 its own electrical connection,   its own cooling circuit inlet,   its own cooling circuit outlet,   a plurality of its attachment points   to at least one other component of the drive block.   
     
     
         28 . A drive block of an electric motor-driven motor vehicle drive for two single-wheel drives on one common axle,
 comprising a first electric machine and a first transmission arranged on an end face of the first electric machine, and   a second electric machine and a second transmission arranged on an end face of the second electric machine,   and comprising two parking locks and a parking lock actuation mechanism,   wherein in each case one inverter, one electric machine and one form a drive combination, which constitutes a separate drive,   each separate drive being equipped with one of the two parking locks for blocking an output shaft that leads out of the drive to a wheel drive,   and in that the electric machines are arranged at least partially congruent with each other in a longitudinal vehicle direction and   are designed for installation in a motor vehicle transverse direction,   and in that the parking lock actuation mechanism, which comprises   either a single parking lock actuator for synchronously actuating the two parking locks to create a locked state, or   two parking lock actuators for creating a locked state in each drive combination,   is situated between the transmissions in an area close to the ground when the drive block is in an installation position.   
     
     
         29 . The drive block according to  claim 28 , wherein each parking lock in the locked state causes inhibition of rotation by means of the associated transmission. 
     
     
         30 . The drive block according to  claim 28 , wherein at least one of the parking locks is designed comprising at least one of the following configurations:
 the at least one parking lock in the locked state rotationally immobilizes a planetary transmission stage of the transmission by engaging in a planet carrier,   the at least one parking lock in the locked state rotationally immobilizes an output gear,   the at least one parking lock rotationally immobilizes an input shaft of the transmission,   a smaller pinion of two pinions that form a transfer stage is blocked when the parking lock is in an engaged state.   
     
     
         31 . The drive block according to  claim 16 , wherein the drive block comprises one parking lock or two parking locks, which are designed to be actuated by either one actuation mechanism or by two actuation mechanisms. 
     
     
         32 . The drive block according to  claim 16 , wherein the inverters are placed as inverters arranged as a point-symmetrical mirror image of each other relative to a separation gap therebetween. 
     
     
         33 . The drive block according to  claim 19 , wherein a power supply cable from an electrical energy store can be connected to the cable connection adapter. 
     
     
         34 . The drive block according to  claim 19 , wherein the cable connection adapter is oriented sideways and configured for being connected to a central energy source in an exchangeable manner. 
     
     
         35 . The drive block according to  claim 28 , wherein the parking lock is a pawl-type lock which is configured to be actuated hydraulically or by an electric motor or by comprising a spring energy store.