Electric drive train of a soil compactor

Abstract

Powertrain, including: a drive axle; a transmission connected to the drive axle, wherein the transmission comprises a transmission train, the transmission train comprising an input gear, an intermediate gear, a PTO output gear and a disconnect clutch configured to selectively couple the intermediate gear to the drive axle; an electric motor, wherein the electric motor is mounted on the transmission in the longitudinal direction of the vehicle and coupled to the input gear; and a power take-off device that is mounted on the gearbox next to the electric motor and coupled to the PTO output gear.

Description

TECHNICAL AREA

[0001] The invention relates generally to an electric drive system for an off-road vehicle with a power take-off device, such as a vibratory roller. The system comprises a transmission with a disengaging device that couples an electric motor to a power take-off. BACKGROUND AND DETOUR

[0002] Vehicles, such as soil compactors, can be equipped with a vibratory roller. The vehicle's drivetrain can include a traction motor, a vibratory motor, and a roller drive motor. The vibratory motor can vibrate the vibratory roller. The roller drive motor can drive the vibratory roller and cause it to rotate. The vibratory motor and the roller drive motor can be hydraulic motors, which are hydraulically driven by a pump, referred to here as a tandem pump. The tandem pump can, in turn, be driven by a motor. The traction pump can drive a hydraulic motor, which in turn drives a drive axle and the wheels attached to it. The vehicle can be propelled in one direction by the drive axle and the vibratory roller via the roller drive motor, with the drive axle being driven by the hydraulic motor and the hydraulic motor by the motor.

[0003] Using a motor to drive the tandem pump can lead to higher power losses in the drivetrain compared to an electric motor, as rotational energy is converted into hydraulic energy and back again. Multiple drive units, multiple motors, and pumps in the drivetrain of a vibratory roller can increase complexity and maintenance requirements compared to other vehicle drivetrains. Similarly, the drivetrain may exhibit increased heat buildup (e.g., lower thermal efficiency) compared to other vehicle drivetrains.

[0004] The inventors recognized these and other problems with such systems. As illustrated in one example, a drive train comprises: a drive axle; a transmission connected to the drive axle, the transmission comprising a gear train, the gear train comprising an input gear, an intermediate gear, a PTO output gear, and a disengaging clutch configured to selectively engage the intermediate gear with the drive axle; an electric motor, the electric motor being mounted on the transmission in a longitudinal direction along the vehicle and coupled to the input gear; and a power take-off device being mounted on the transmission alongside the electric motor and coupled to the PTO output gear.

[0005] The gear train can be selectively coupled via a disconnecting device, which is a disconnecting assembly containing the disconnecting clutch. When selectively coupled, one or more drive motors, including the electric motor, can be driven by the drive axle. In the coupled state, rotational energy can be transmitted from the drive motor to the drive axle via the gear train without converting the rotational energy into hydraulic energy and vice versa. The disconnecting clutch can be in an engaged state to selectively and actively couple the electric motor to the drive axle via the gear train. The disconnecting clutch can be in a disengaged state to decouple the electric motor from the drive axle via the gear train.With the disconnect clutch engaged and disengaged, the electric motor can be coupled to the power take-off (PTO). The electric motor can drive the PTO in parallel with the drive shaft if it is selectively coupled via the gear train. Power and rotational energy can be distributed between the PTO and the drive shaft via the intermediate gear. For example, power can be distributed if the drive shaft is selectively coupled to the intermediate gear via the disconnect clutch.

[0006] This approach allows for a compact and robust configuration, reducing the need for additional electric motors and inverters for auxiliary functions. For example, additional electric motors powering auxiliary devices such as steering systems or components like edgers, grit spreaders, sprinklers, etc., can be reduced, downsized, and / or eliminated. Similarly, in soil compactors, directly mounting the electric motor and power take-off (PTO) pump on a rear drive axle can increase the vehicle's available space. Positioning the battery pack at the rear of the vehicle and optimizing the chassis design are therefore possible, as more space is available around and enclosed by the chassis.

[0007] It is understood that the above summary serves to present, in simplified form, a selection of concepts that are explained in more detail in the full description. It is not intended to identify important or essential features of the claimed subject matter, the scope of protection of which is clearly defined by the claims following the full description. Furthermore, the claimed subject matter is not limited to implementations that overcome all the disadvantages mentioned above or in any part of this disclosure. BRIEF DESCRIPTION OF THE FIGURES Fig. Figure 1 shows a schematic representation of a vehicle with a vibratory roller. Fig. Figure 2 shows a schematic representation of an electrified drive train for a drive axle. Fig. Figure 3 shows a block diagram for a system for the vehicle's powertrain with electrical and hydraulic components. Fig. Figure 4 shows a top view of a drive axle arrangement. Fig. Figure 5 shows a sectional view of a gear arrangement. Fig. Figure 6 shows a sectional view of the gear arrangement. Fig. Figure 7 shows a sectional view of the gear arrangement. Fig. Figure 8A shows a sectional view of the gearbox assembly, with one disconnect clutch of the gearbox assembly closed. Fig. Figure 8B shows a sectional view of the gearbox assembly with the disconnect clutch of the gearbox assembly open. DETAILED DESCRIPTION

[0008] The following description refers to electrified powertrain systems for a vehicle. The power transmission of these systems includes an axle assembly with a drive axle connected to an electric machine and a power take-off (PTO). The electrified powertrain comprises one or more electric machines capable of driving components using rotational force and hydraulic energy. The electrified powertrain can be used in an off-highway vehicle equipped with a vibratory roller, such as a soil compactor. The electrified powertrain includes a vibratory motor and a roller drive motor capable of vibrating and rotating / driving the vibratory roller. The electric machines can be electric motors or electric motor / generator combinations.The vibration motor and the roller drive motor can be supplied with hydraulic fluid and power via a hydraulic pump, also referred to here as a vibration pump. Likewise, the vibration pump and / or another hydraulic pump, such as a steering pump, can supply hydraulic fluid and power to a variety of consumers for vehicle functions, such as steering, crab steering, edge trimming, and grit spreading.

[0009] The power take-off device comprises a first hydraulic pump and may include a second hydraulic pump or be configured to deliver rotary power to it. The first hydraulic pump can supply a first fluid circuit with hydraulic energy to drive and vibrate the vibratory roller via a hydraulic motor or vibratory motor. The second hydraulic pump can supply a second fluid circuit with hydraulic energy to drive other auxiliary devices, including steering devices. Electrification of the power transmission can result in a reduction of noise, vibration, and sound (NVH) emissions perceived by a vehicle occupant compared to a non-electrified power transmission. Likewise, electrification of the power transmission can reduce noise levels in the vehicle's surroundings.

[0010] The drive axle assembly comprises a gearbox with two inputs, including a first input for mounting the electric motor and a second input for mounting the power take-off (PTO) and / or the vibratory pump. In a first operating mode, the electric motor can drive the drive axle for traction and simultaneously drive the PTO. The gearbox and drive axle assembly have a disengagement device, which is a disengagement assembly that includes a disengaging clutch and can be switched. The disengagement device serves to supply power to the PTO when traction is not desired, so that the hydraulic pump can hydraulically drive auxiliary functions such as the steering or auxiliary components such as an edger, a grit spreader, a sprinkler, etc.The disconnect clutch can close to selectively engage the drive train and distribute the torque between the power take-off (PTO) and the drive axle. The disconnect clutch can open to supply torque to the PTO and prevent or reduce the transmission of torque to the drive axle. Various drive ratios can be achieved by changing the gear ratios and / or the ring and pinion ratios. Mounting an electric motor on the drive axle's drive train allows for a more compact and space-saving axle configuration.

[0011] In this or a similar configuration, the arrangement is compact and robust, eliminating the need for additional electric motors and inverters for auxiliary functions. Even in soil compaction applications, the direct mounting of the electric motor and the hydraulic pump (PTO) on the rear drive axle saves space on the vehicle. This configuration allows the battery pack to be located at the rear of the vehicle; furthermore, the vehicle chassis can be optimized by increasing the available space around and enclosed by the chassis.

[0012] Fig. Figure 1 shows a schematic representation of a vehicle with a vibratory roller. Fig. Figure 2 shows a schematic representation of an electrified powertrain for a drive axle, which is connected to the vehicle by Fig. 1 can be used. Fig. Figure 3 shows a block diagram for a system for a powertrain of the vehicle of Fig. 1. With electrical and hydraulic components. At least one electric motor of the drive train can drive a first pump and a second pump via a gearbox on the drive axle. The first pump can drive a first hydraulic motor, and the first hydraulic motor can drive the vibratory roller. The second pump can drive a variety of auxiliary elements. The first pump can drive a third hydraulic motor, which can vibrate the vibratory roller. Fig. Figure 4 shows a top view of a drive axle assembly that is fitted to the vehicle by Fig. 1 can be used. Fig. Figure 5 shows a sectional view of a gear arrangement of Fig. 4. Fig. Figure 6 shows a sectional view of the gear arrangement of Fig. 4. Fig. Figure 7 shows a sectional view of the gear arrangement of Fig. 4. The gear arrangement of the Fig. 4-7 comprises an input gear, an intermediate gear, a PTO output gear, and a disconnect clutch, the disconnect clutch being part of a larger disconnect assembly. The electric machine can be attached to the transmission assembly and drive the input gear. The PTO output gear can drive a power take-off (PTO) attached to the transmission assembly, the PTO driving the first and / or second pump of Fig. 3 can drive. The intermediate gear can optionally be coupled via the disconnect coupling to a pinion that can drive the drive axle assembly. Fig. Figure 8A shows a sectional view of the gearbox assembly with one of the gearbox's disconnect clutches closed. When the disconnect clutch is closed, the gearbox can distribute the torque from the input gear to the PTO output gear and pinion. Fig. Figure 8B shows a sectional view of the gearbox assembly with the gearbox's disconnect clutch open. When the disconnect clutch is open, the gearbox can transmit a torque from the input gear to the PTO output gear.

[0013] It is understood that the specific arrangements and systems shown in the accompanying drawings and described in the following description are merely exemplary embodiments of the inventive concepts defined herein. For the sake of clarity, the drawings are described together. Therefore, identical elements may be designated by the same reference numerals and need not be introduced again.

[0014] The Fig. Figures 1-3 show a schematic representation of an example configuration with the relative positioning of the various components. In the Fig. Figures 4-8B show example configurations with approximate positioning. Fig. Figures 4-8B are shown approximately to scale; however, other relative dimensions may also be used. Unless otherwise stated, the term "approximately" means plus or minus five percent of the range.

[0015] Furthermore, the Fig. 1-8B Example configurations with relative positioning of the various components. If such elements are depicted in direct contact with each other or directly coupled, then they can be described as being in direct contact with each other or directly coupled in at least one example. Similarly, elements depicted side by side or adjacent to each other can be described as being adjacent to each other or adjacent to each other in at least one example. For instance, components that are in planar contact with each other can be described as being in planar contact. As a further example, elements that are separated from each other, with only a gap between them and that do not contain any other components, can be described as such in at least one case.In yet another example, elements that are displayed above / below each other, on opposite sides, or to the left / right of each other can be described as such, relative to one another. Furthermore, in at least one example, as shown in the figures, a topmost element or the highest point of an element can be referred to as the "top" of the component, and a bottommost element or the lowest point of the element can be referred to as the "bottom" of the component. The terms top / bottom, upper / lower, and above / below used here can refer to a vertical axis of the figures and be used to describe the positioning of elements within the figures relative to each other. Thus, in one example, elements displayed above other elements are arranged vertically above the other elements.As a further example, the shapes of the elements depicted in the figures can be described as such (e.g., circular, straight, planar, curved, rounded, beveled, angled, etc.). Furthermore, the depicted elements that intersect each other can be described as intersecting elements or as mutually intersecting elements in at least one example. In addition, an element depicted inside or outside another element can be described as such. Finally, the components can be described in relation to the reference axes included in the drawings.

[0016] Features described as axial can be approximately parallel to a datum axis unless otherwise specified. Unless otherwise specified, features described as counter-rotating can be approximately perpendicular to the datum axis. Unless otherwise specified, features described as radial can circumferentially surround or extend outward from an axis, such as the datum axis, or a component or feature previously described as radial to a datum axis. Unless otherwise specified, features described as tangential can extend linearly from a point on a circumference radial to an axis, component, or feature previously described as radial to a datum axis.

[0017] Features described as longitudinal can run approximately parallel to a longitudinal axis. A lateral axis can be perpendicular to a longitudinal axis and a vertical axis. Features described as lateral can run approximately parallel to the lateral axis. A vertical axis can be perpendicular to a lateral axis and a longitudinal axis. The vertical axis can be relative to the direction of gravity and parallel to it. Features described as vertical can be approximately parallel to a vertical axis.

[0018] Fig. Figure 1 shows a first schematic representation 150 of a vehicle 100. The vehicle 100 can be a soil compactor. The vehicle 100 can have a first side 112 and a second side 114. The first side 112 can be the front of the vehicle 100. Likewise, the second side 114 can be the rear of the vehicle 100. The vehicle 100 has a drive axle 108 and a vibratory roller 140. The drive axle 108 can be a rear drive axle, located furthest back relative to the front of the vehicle 100. The vibratory roller 140 can be a front vibratory roller. The vehicle 100 includes a chassis 142. The chassis 142 can support the vibratory roller 140 and the drive axle 108.The drive axle 108 and the vibratory roller 140 can be attached to the chassis 142, with the rotating elements of the drive axle 108 and the vibratory roller 140 being able to rotate independently of the chassis 142. The drive axle 108 can drive the vehicle 100 in one direction.

[0019] A series of reference axes 101 are in Fig. 2 and in the Fig. Figures 4-7 are shown. The reference axes 101 specify a y-axis, an x-axis, and a z-axis. In one example, the z-axis can be parallel to a direction of gravity, and the xy-plane parallel to a horizontal plane of the vehicle 100. Fig. 1-2. A drive axle arrangement 402 made of Fig. 4 and a differential arrangement 414 and a gear arrangement 416 made of Fig. 5 can rest on it.

[0020] Fig. Figure 2 shows a second schematic representation 202 of an example of vehicle 100. This second schematic representation 202 shows that vehicle 100 can have a third side 116 and a fourth side 118, with the third side 116 being opposite the fourth side 118. The third side 116 and the fourth side 118 can be separated by a vehicle centerline 119. The vehicle centerline 119 is parallel to the y-axis and can be a longitudinal axis.

[0021] Vehicle 100 is an electrified vehicle comprising an electrified powertrain 102. The powertrain 102 includes a transmission 103. The powertrain 102 can be enclosed by a plurality of first dashed lines 152. Likewise, the transmission 103 can be enclosed by a plurality of second dashed lines 154. Vehicle 100 comprises an electric machine 126 and a power source 132. The electric machine 126 is a drive machine capable of propelling the vehicle 100. The electric machine 126 can be an electric motor or an electric motor / generator. The power source 132 is an energy storage device, such as a battery pack, which may include a traction battery. It is understood that the power source 132 can be located at the rear of the vehicle 100 relative to the powertrain 102. For example, power source 132 can be relative to the first page 112 of Fig. 1 is located closest to the second side 114. Likewise, the power source 132 can be located above or below the drive axle 108 of Fig. 1 be attached. The power transmission 103 can comprise a first wheel 106a, a second wheel 106b, and a drive axle 108. Although the first wheel 106a and the second wheel 106b in Fig. As shown in Figure 1, one or more examples may also include more wheels. For example, vehicle 100 may have four or more wheels, including two or more front wheels located in front of the drive axle 108.

[0022] The drive axle 108 can be enclosed by a plurality of third dashed lines 156. The drive axle 108 can have a gearbox 104, a differential assembly 120, an axle shaft 124, and a plurality of drive axles, including a first axle drive 122a and a second axle drive 122b. The electric machine 126 can be rotaryally coupled to the gearbox 104, for example, to introduce a power flow into the gearbox 104 via torque. The electric machine 126 can have an output shaft 111. The output shaft 111 can be coupled to the gearbox 104, thereby making the electric machine 126 rotatable and drive-connected to the gearbox 104. The gearbox 104 can be drive-coupled to the drive axle 108 and supported by the differential assembly 120. The differential arrangement 120 can support and connect the shaft 124.The axle shaft 124 can carry the first axle drive 122a, the second axle drive 122b and a variety of wheels, including a first wheel 106a and a second wheel 106b.

[0023] The electric machine 126 can be an electric motor or an electric motor generator. The electric machine 126 can be the main drive machine of the vehicle 100. The mechanical energy provided by the electric machine 126 can be set and controlled by the motor control unit (MCU) 134. The vehicle 100 also has a transmission 104. The power transmission 103 includes a first wheel 106a, a second wheel 106b, a drive axle 108, and similar components as described in Fig. 1. The energy can be stored as chemical energy in the power source 132. The power source 132 converts chemical energy into electrical energy. The electrical energy can be transferred from the power source 132 to the electric machine 126. The vehicle 100 can be driven and operated in such a way that no emissions, e.g., greenhouse gases, are produced. The vehicle 100 can therefore be described as a zero-emission vehicle.

[0024] The power source 132 can be electrically coupled to a motor control unit 134 and the electric machine 126. A connection 138 can electrically connect components to the power source 132. In particular, the connection 138 electrically couples the power source 132, the motor control unit 134, and the electric machine 126. For the example in Fig. 2. The motor control unit 134 may include an inverter and / or be electrically coupled to it, which can convert direct current (DC) from the power source 132 into alternating current (AC) for the electric machine 126. In other examples, a separate inverter may be present between the power source 132 and the motor control unit 134 along the connection 138, which converts the DC from the power source 132 into alternating current for the motor.

[0025] The electrical energy supplied from the power source 132 to the electric machine 126 can be set and controlled by the motor control unit 134. The rotational speed and the mechanical energy generated by the electric machine 126 can be set and controlled by the motor control unit 134 and the gearbox 104. The mechanical energy generated by the electric machine 126 can be transmitted to the gearbox 104. The gearbox 104 can transmit mechanical energy to the drive shaft 108.

[0026] The electric machine 126 can generate torque and transmit power via the output shaft 111 to the gearbox 104. The gearbox 104 can transmit the power to the differential assembly 120, the shaft 124, and the first and second wheels 106a and 106b, respectively. If the torque is sufficient to overcome friction or other forces acting on the first and second wheels 106a and 106b, the components of the differential assembly 120 and the shaft 124 can rotate. This causes the first and second wheels 106a and 106b to rotate with the shaft 124, thus driving the vehicle 100 in one direction. The differential assembly 120 can adjust the torque supplied to the first and second wheels 106a and 106b while cornering. Furthermore, the first axle drive 122a and the second axle drive 122b can transmit the torque to the first wheel 106a and the second wheel 122b, respectively.supplied to the second wheel 106b, adjust to the weight of the load of the vehicle 100.

[0027] The rotation of the output shaft 111 transfers mechanical energy to the differential assembly 120. A differential in the differential assembly 120 transfers mechanical energy from the output shaft 111 to the axle shaft 124. This mechanical energy can cause the axle shaft 124 to rotate. Depending on the rotation of the output shaft 111 and the configuration of the differential assembly 120, the axle shaft 124 can rotate in the direction of either the first side 112 or the second side 114. The rotation of the axle shaft 124 forces the wheels to rotate in the same direction. When the vehicle 100 rotates, the third side 116 of the shaft 124 and the first wheel 106a rotate at different speeds than the fourth side 118 of the shaft 124 and the second wheel 106b, respectively.The first axle drive 122a, the second axle drive 122b and the differential arrangement 120 can change the rotational speed of the first wheel 106a, the second wheel 106b and the different sides of the axle shaft 124, so that the vehicle 100 can travel over a road surface without slippage while reducing damage to the power transmission.

[0028] The first axle drive 122a and the second axle drive 122b can reduce the rotational speed of the axle shaft 124 by decreasing the speed and increasing the torque. The first axle drive 122a and the second axle drive 122b can enable the movement of the vehicle 100 by increasing the torque at the output shaft 111. Furthermore, the first axle drive 122a and the second axle drive 122b can help the vehicle 100 rotate and prevent it from spinning freely. The first axle drive 122a on the third side 116 and the second axle drive 122b on the fourth side 118 can rotate at different speeds. The first and second axle drives 122a, 122b can cause the third side 116 and the fourth side 118 of the shaft 124 to rotate at different speeds. Likewise, the first and second axle drives 122a, 122b can cause the first wheel 106a and the second wheel 106b to rotate at different speeds.The first axle drive 122a and the second axle drive 122b can each comprise a single planetary gear set or a plurality of planetary gear sets.

[0029] Fig. Figure 3 schematically shows a powertrain system 300 of the present disclosure as a block diagram. The vehicle 100 of Fig. 1-2 can include the drivetrain system 300, and the power transmission system can include the drivetrain 102 and the drivetrain 103. Fig. 2 include. The powertrain system 300 and the powertrain 102 are surrounded by the first dashed lines 152.

[0030] The drivetrain system 300 can deliver power via hydraulic pumps to hydraulic motion components and other consumers through several first hydraulic lines 316 and several second hydraulic lines 318. The first hydraulic lines 316 are part of a first hydraulic circuit. The second hydraulic lines 318 are part of a second hydraulic circuit. The drivetrain system 300 also includes an electrical system that can allow current to flow between the electrified components via electrical couplings 320.

[0031] The electrical couplings 320 can electrically couple the power source 132 to an MCU / inverter assembly 322 and the MCU / inverter assembly 322 to the electric machine 126. The MCU / inverter assembly 322 can control the motor control unit 134. Fig. 2 and comprise one or more inverters. The inverter(s) of the MCU / inverter assembly 322 can be configured to convert direct current (DC) to alternating current (AC), e.g., DC from the power source 132 to AC for the electric machine 126. The electric machine 126 can be rotatably coupled to a first gearbox 324 to drive the first gearbox 324 via a rotational force, e.g., a torque. The first gearbox 324 can be coupled to the drive shaft 108 and deliver rotational energy to it. The rotary and drive-related coupling of the electric machine 126 with the drive axle 108 via the first gearbox 324 can make the drive train system 300 more compact and reduce the installation space volume compared to a power transmission according to the state of the art: for example, a drive train system with a hydraulic motor that can drive the drive axle 108 instead of the electric machine 126.Additionally, the electric machine 126 can be attached to the drive axle 108, e.g. by mounting it on the first gearbox 324. The first gearbox 324 can reduce the volume and area of ​​the drive train system 300, e.g. below a threshold for a desired installation space and chassis architecture 142. Fig. 1. The first gearbox 324 can replace gearbox 104 from Fig. 2 or part of it.

[0032] By coupling the drive axle 108 and the first gearbox 324 with the electric machine 126, a more compact architecture of the drive system 300 is achieved. For example, the first gearbox 324 can reduce the number of power electronic components by eliminating the need for a separate motor and inverter for each auxiliary drive. Furthermore, the first gearbox 324 enables the drive system 300 to power the drive axle 108 and the auxiliary systems, even though the vehicle 100 does not have an internal combustion engine (ICE), a steam engine, or a non-electrified drive. Additionally, the first gearbox 324 allows the drive system 300 to power the drive axle 108 without the need for a hydraulic transmission system, which would include a hydraulic pump and a hydraulic motor to drive the drive axle 108.

[0033] A vibration pump 334 can be driven by the first gearbox 324, so that the torque input to the first gearbox 324 can drive the vibration pump 334. The electric machine 126 can also be driven by the first gearbox 324 and thus driven by the vibration pump 334, so that the torque of the electric machine 126 can drive the vibration pump 334. Furthermore, the vibration pump 334 can be attached to the drive axle 108, for example, by mounting it on a housing of the first gearbox 324. The electric machine 126 and the vibration pump 334 can be mounted longitudinally in the vehicle 100 or in another vehicle in which the drivetrain system 300 is housed.

[0034] By directly mounting the electric motor 126 and / or the vibration pump 334 on the drive axle 108, the drive train 102 of the drive train system 300 can be more compact and robust compared to power transmission systems that use hydraulic motors to drive the drive axle 108. Mounting the electric motor 126 and / or the vibration pump 334 on the drive axle can increase the installation space of the vehicle 100, particularly the installation space at the rear of the vehicle 100. The increased installation space resulting from mounting the electric motor 126 and the vibration pump 334 on the drive axle can allow the power source 132 to be mounted at the rear of the vehicle 100, for example, on the rear of the chassis 142. Fig. 1. If the power source 132 of the vehicle 100 is mounted at the rear, the installation space available for the vehicle 100 can be further increased. Increasing the vehicle's installation space by mounting the electric machine 126 and / or the vibration pump 334 on the drive axle 108 and mounting the power source 132 at the rear can increase the installation space for the vibratory roller 140, allowing the vibratory roller 140 to have a larger diameter.

[0035] The vibratory pump 334 is part of the first hydraulic circuit and is connected to the first hydraulic lines 316. The vibratory pump 334 can supply hydraulic fluid, hydraulic pressure, and hydraulic power via the first hydraulic circuit to a vibratory motor 332 and a hydraulic motor 336. The second gearbox 338 can be driven by the hydraulic motor 336 and provide rotational energy to drive the vibratory roller 140. The first gearbox 324 can be driven and transmit rotational energy to drive the steering pump 342, for example, via the vibratory pump 334. For instance, the vibratory pump 334 and the steering pump 342 can be configured in a tandem pump arrangement, where both pumps are driven by the same shaft. Alternatively, a larger tandem pump can comprise the vibratory pump 334 and the steering pump 342.The vibration pump 334 and the steering pump 342 are hydraulic pumps that can deliver hydraulic fluid and hydraulic power to drive hydraulic motors and to drive other components for auxiliary processes of the powertrain system 300.

[0036] The first gearbox 324 can be optionally coupled to the drive axle 108 via a disconnecting device 326. In the coupled state, the disconnecting device 326 allows the electric motor 126 to drive the drive axle 108, the vibration pump 334, and the steering pump 342 via the first gearbox 324. In the disconnected state, the disconnecting device 326 allows the electric motor 126 to drive the vibration pump 334 and the steering pump 342 via the first gearbox 324. The vibration pump 334 and the steering pump 342 can drive a variety of auxiliary devices and functions via these auxiliary devices.

[0037] The drive train system 300 and the drive train 102 comprise a vibratory roller system. The vibratory roller system includes the vibratory roller 140, a hydraulic motor 336, and a vibratory motor 332. The hydraulic motor 336 can be rotatably and drivenly coupled to the vibratory roller to, for example, drive the vibratory roller 140. Likewise, the vibratory motor 332 can be vibrationally coupled to the vibratory roller 140, so that the vibratory motor 332 causes the vibratory roller 140 to vibrate. As described herein, vibrationally coupled or vibration coupling refers to a first component that is coupled to a second component and configured to cause the first component to vibrate the second component. The vibratory roller system can also include a reduction arrangement that can drive the hydraulic motor 336 to the vibratory roller 140.For example, a second gearbox 338 can couple the hydraulic motor 336 to the vibratory roller 140. In other words, the hydraulic motor 336 can be coupled to the second gearbox 338 to transmit the torque to the second gearbox 338. The second gearbox 338 can then be coupled to the vibratory roller 140 to, for example, transmit torque to the vibratory roller 140 and drive it. The torque can be transmitted between the hydraulic motor 336, the second gearbox 338, and the vibratory roller 140 via a torque.

[0038] When driven, the vibratory pump 334 can generate a pressure differential for the first hydraulic lines 316. The vibratory motor 332 can set the vibratory roller 140 into vibration. The hydraulic motor 336 can act as a roller drive motor and provide torque to drive the vibratory roller 140. The hydraulic motor 336 can transmit torque to drive the second gearbox 338, and the second gearbox 338 can transmit torque to drive the vibratory roller 140. The second gearbox 338 can change the torque input to output a different torque, and the second gearbox 338 can increase the torque to the vibratory roller 140 from the hydraulic motor 336.

[0039] The steering pump 342 and the second hydraulic lines 318 can be part of a second hydraulic circuit. The steering pump 342 can supply hydraulic fluid, hydraulic pressure, and hydraulic power via the second hydraulic circuit to a fan motor 344. The fan motor 344 is a hydraulic motor. The fan motor 344 can drive at least one auxiliary device, including a steering cylinder 352, a crab steering cylinder 354, a cylinder edger 356, or a roller spreader 358. Additionally, the fan motor 344 can drive a variety of auxiliary devices, including the steering cylinder 352, the crab steering cylinder 354, the cylinder edger 356, and / or the roller spreader 358.The steering cylinder 352, the crab steering cylinder 354, the roller edge cutter 356, and the roller spreader 358 can be used for auxiliary functions such as steering the vehicle 100, crab steering the vehicle 100, removing soil accumulations and other particles from the edges of the vibratory roller 140, and spreading aggregates, respectively. In addition, the fan motor 344 can drive devices for spraying liquids, including one or more sprinklers.

[0040] The electric machine 126 can be the sole electric motor driving a variety of auxiliary devices of the drive train 102, such as the steering cylinder 352, the crab steering cylinder 354, the cylinder edge cutter 356, and the roller spreader 358. Likewise, at least one inverter of the MCU / inverter assembly 322 can be the sole inverter supplying power to the electric machine 126 and driving the auxiliary devices of the drive train 102. In other words, the arrangement of the drive train system 300 can prevent additional electric motors and inverters, e.g., separate from the electric machine 126 and the inverter(s) of the MCU / inverter assembly 322, from driving auxiliary functions of the drive train 102.

[0041] In this way, the presented system enables an electrified powertrain for a vehicle with a vibratory roller. The electrified powertrain comprises an electric motor that can drive components with rotational and hydraulic power via a gearbox. The electric motor can drive the power take-off (PTO) assembly via the gearbox. The gearbox is an integrated gearbox for an axle assembly. The electric motor and the PTO assembly can be mounted on and coupled to the gearbox. The PTO assembly can drive a first and a second pump. The first and second pumps can be arranged in a tandem configuration and drive auxiliary functions of the vehicle. The electrified powertrain includes a vibratory motor and a roller drive motor, which can vibrate and drive the vibratory roller, respectively. The first pump can hydraulically drive both the vibratory motor and the roller drive motor.Similarly, the second pump can hydraulically drive a variety of consumers for vehicle functions, such as steering, crab steering, edge cutting and grit spreading.

[0042] Fig. Figure 4 shows a first view 400 of the drive axle assembly 402. The drive axle assembly 402 can drive the drive axle 108 of Fig. Figures 1-3 comprise. The first view 400 shows a first axle 404, a second axle 406, and a third axle 408. The first and second axles 404, 406 can be longitudinal axes relative to a vehicle in which the drive axle assembly 402 is located. The third axle 408 can be a transverse axis with respect to the vehicle in which the drive axle assembly 402 is located.

[0043] The drive axle assembly 402 comprises a drive axle 412, a differential assembly 414, and a transmission assembly 416. The drive axle 412 may include the differential assembly 414, and the differential assembly 414 may include the transmission assembly 416. The drive axle 412 may be a rear drive axle. An electric machine 418 and a power take-off device may be attached to the drive axle assembly 402 via the transmission assembly 416. The electric machine 418 and the power take-off device may be driven by the transmission assembly 416. More precisely, the electric machine 418 and the power take-off device may be positioned side by side and attached to the transmission assembly 416. In particular, the electric machine 418 may be centered about the first axis 404, and the power take-off device about the second axis 406.The electric machine 418 contained therein can be mounted longitudinally in the vehicle 100 or in another vehicle in which the drive axle assembly 402 is housed. The first axis 404 can be a rotational axis for the electric machine 418, around which rotating elements of the electric machine 418 can rotate radially. For example, the rotor of the electric machine 418 can rotate radially about the first axis 404. Likewise, the second axis 406 can be a rotational axis for the power take-off device, around which rotating elements of the power take-off device can rotate radially. For example, a power take-off connection of the power take-off device can rotate radially about the second axis 406. The power take-off device contained therein can be mounted longitudinally in the vehicle 100 or in another vehicle in which the drive axle assembly 402 is housed.

[0044] The transmission arrangement 416 can be an integrated transmission arrangement with an integrated transmission part of the differential arrangement 414. The electric machine 418 can be an electric motor or an electric motor-generator. The electric machine 418 can be the electric machine 126 from Fig. 2-3. The power take-off device can, for example, be a hydraulic pump assembly 420, and the power take-off device can be referred to here as the hydraulic pump assembly 420. The hydraulic pump assembly 420 can be or comprise at least one hydraulic pump. Furthermore, the hydraulic pump assembly 420 can be a tandem pump comprising two or more pumps, such as the vibration pump 334 and the steering pump 342 in Fig. 3. Another example: The hydraulic pump assembly 420 can be part of a larger tandem pump assembly, wherein the hydraulic pump assembly 420 can be or include the vibration pump 334 or the steering pump 342 and shares a common shaft with another pump assembly that includes the steering pump 342 or the vibration pump 334, respectively. The hydraulic pump assembly 420 includes a power take-off connection or is coupled to one for drive purposes. The power take-off connection can be coupled to the transmission assembly 416.

[0045] The drive axle assembly 402 comprises a first hub assembly 422 and a second hub assembly 424. The first hub assembly 422 and the second hub assembly 424 can each be coupled to a wheel. The first hub assembly 422 can be rigidly coupled to a first shaft housed in a first axle housing 426. The second hub assembly 424 can be rigidly coupled to a second shaft housed in a second axle housing 428. The differential system of the differential assembly 414 can be coupled to the first axle shaft and the second axle shaft, the differential assembly 414 being able to drive the first shaft with a different power and at a different speed than the second axle shaft. For example, the first hub assembly 422 can be coupled to the first wheel 106a of Fig. 2 be coupled. Likewise, the second hub arrangement 424 can be coupled with the second wheel 106b of Fig. 2 are coupled. Both the first wheel 106a and the second wheel 106b can rotate with different forces and different speeds.

[0046] The gear assembly 416 comprises a gear housing 430 and a first cover 432. The gear assembly 416 can include a first input 436 and a second input 438. A rotational force, e.g., in the form of torque, can be transmitted to the gear assembly 416 via the first input 436 and the second input 438. The first cover 432 can contain the first input 436 and the second input 438. The electric machine 418 can be driven by the first input 436. The electric machine 418 can be attached to the first cover 432 and transmit torque to the gear assembly 416 via the first input 436. The electric machine 418 can be driven by the first input 436. The hydraulic pump arrangement 420 can be coupled to the second input 438 for drive purposes, so that it is driven by the second input 438.The hydraulic pump assembly 420 can be attached to the first cover 432 and receive torque from the gearbox assembly 416 via the second input 438. In other words, the second input 438 can be the power take-off connection for the hydraulic pump assembly 420. The first input 436 can be radially centered about the first axis 404, which can be a rotational axis about which the first input 436 can rotate radially. Likewise, the second input 438 can be radially centered about the second axis 406, which can also be a rotational axis about which the second input 438 can rotate radially. The side of the gearbox assembly 416 to which the electric machine 418 is attached can be referred to here as the motor side.

[0047] For example, the electric machine 418 can be attached to the first inlet 436 by several first fasteners 462. Likewise, the hydraulic pump assembly 420 can be attached to the second inlet 438 by a plurality of second fasteners 464. Several third fasteners 466 can secure and mount the first cover 432 to the gearbox housing 430.

[0048] The differential assembly 414 comprises a differential housing 442. The differential housing 442 can accommodate the differential of the differential assembly 414. The differential housing 442 can alternatively also be referred to as the differential carrier 442. The differential carrier 442 can include the transmission housing 430. The transmission assembly 416 can, for example, be an integrated transmission assembly of the differential carrier 442 with an integrated transmission. Thus, the differential carrier 442 can also include the transmission housing 430.

[0049] The transmission arrangement 416 also includes a separating device 440. The separating device 440 can separate the separating device 326 from Fig. 3 be or include. The separating device 440 is a separating arrangement which can engage a disconnecting clutch for the selective coupling of rotating elements of a transmission train which is received by the transmission housing 430 and the differential carrier 442.

[0050] Fig. Figure 5 shows a second view 500 of the differential assembly 414 and the gear assembly 416, wherein the differential assembly 414 and the gear assembly 416 are shown separately from other components of the drive axle 412. The second view 500 is a sectional view (e.g., a cross-sectional view). The second view 500 is a top view (e.g., a downward view along the z-axis of the reference axes). The second view 500 shows a gear train 522 of the gear assembly 416. The differential can be subdivided by a first line 504 and a second line 506. The first line 504 is lateral, and the second line 506 is longitudinal. A sectional view can be taken on the first line 504 and the second line 506, wherein a first view plane for a first sectional view includes the first line 504 and a second view plane for a second sectional view includes the second line 506. The second view 500 shows a fourth axis 512 and a fifth axis 514.The fourth and fifth axles 512, 514 can be longitudinal axes with respect to the vehicle in which the drive axle assembly 402 is housed. Components and features of the transmission assembly 416, including components and features of the transmission train 522, can be centered around the fourth and fifth axles 512, 514.

[0051] The transmission train 522 comprises several shafts, including a first shaft 524, a second shaft 526, a third shaft 528, and a fourth shaft 530, and is driven by them. The first shaft 524 can be an input shaft for the transmission train 522. The first shaft 524 can be a motor shaft, with an output for the electric machine 418 comprising or rigidly coupled to the first shaft 524. The second shaft 526 can be an intermediate shaft. The third shaft 528 can be the first output shaft of the transmission train 522. The third shaft 528 can be coupled to the differential assembly 414. The fourth shaft 530 can be a second output shaft of the transmission train 522. The fourth shaft 530 can be coupled to the hydraulic pump assembly 420.

[0052] The first shaft 524 can be radially centered around the first axis 404, where the first axis 404 can be an axis of rotation for the first shaft 524. The second shaft 526 can be radially centered around the fourth axis 512, where the fourth axis 512 can be an axis of rotation for the second shaft 526. The third shaft 528 can be radially centered around the fourth axis 512, where the fourth axis 512 can be an axis of rotation for the third shaft 528. The fourth shaft 530 can be radially centered around the second axis 406, where the second axis 406 can be an axis of rotation for the fourth shaft 530. In other words: The first shaft 524, the second shaft 526, the third shaft 528 and the fourth shaft 530 can rotate around the first axis 404, the fourth axis 512, the fourth axis 512 and the second axis 406 respectively.

[0053] The gear train 522 and the third shaft 528 can optionally be coupled via a coupling 532. The coupling 532 is a disconnect coupling for the disconnecting device 440. The coupling 532 includes a locking element that can optionally couple rotating elements of the gear train 522 to the third shaft 528, so that the gear train can drive the third shaft. For example, the coupling 532 can include a coupling gear 534, with the coupling gear 534 being the locking element. The coupling gear 534 can be rigidly coupled to the third shaft 528. More precisely, the coupling gear 534 can rigidly couple the third shaft 528 via a splined connection, with several first splines of the coupling gear 534 and several second splines of the third shaft 528 meshing.

[0054] The gear train 522 comprises a variety of gears, e.g., a first gear 542, a second gear 544, a third gear 546, and a fourth gear 548. The first gear 542 can be an input gear for the gear train 522. The second gear 544 can be an intermediate gear for the gear train 522. The third gear 546 can be a running gear for the gear train 522. The fourth gear 548 can be an output gear (e.g., the PTO output gear) for the gear train 522. The first gear 542 can mesh with the second gear 544; the second gear 544 can mesh with the third gear 546; and the third gear 546 can mesh with the fourth gear 548.

[0055] It is understood that different gear ratios can be achieved by modifying the gear arrangement 416 and, in particular, the gear train 522. For example, the pitch diameters of the first gear 542, the second gear 544, the third gear 546, and / or the fourth gear 548 can be increased to increase the gear ratio of the gear train 522. Another example: The pitch diameters of the first gear 542, the second gear 544, the third gear 546, and / or the fourth gear 548 can be decreased to decrease the gear ratio of the gear train 522. It is also understood that the gear train 522 is not limited and various configurations can be used, which include at least the first gear 542, the second gear 544, and the fourth gear 548.In another configuration of a gear train of the present disclosure, for example, the third gear 546 may be omitted, and the second gear 544 may mesh with the fourth gear 548. As another example, one or more gears may be arranged between the first gear 542 and the second gear 544, which may mesh with the first gear 542 and / or the second gear 544. In this or another example, one or more gears may be arranged between the second gear 544 and the third gear 546, which may mesh with the second gear 544 and / or the third gear 546. In these or other examples, one or more gears may be inserted between the third gear 546 and the fourth gear 548, which may mesh with the third gear 546 and / or the fourth gear 548.

[0056] The coupling gear 534 can optionally be coupled with the second gear 544, e.g. by closing the coupling 532 and switching the disconnecting device 440 from Fig. 4. When optionally coupled via the coupling 532, the second gear 544 and the third shaft 528 can rotate as a single shaft. The coupling gear 534 can slide axially on the second teeth of the third shaft 528 with respect to the fourth axis 512 to engage or disengage the second gear 544. The second gear 544 has, for example, a plurality of first teeth for locking. Likewise, the coupling gear 534 can have a plurality of second teeth for locking. The first teeth can be rigidly coupled to a first face of the second gear 544. The second teeth can be rigidly coupled to a second face of the coupling gear 534. If the clutch gear 534 and the second gear 544 are optionally coupled, the first and second teeth can mesh and lock the clutch gear 534 with the second gear 544.

[0057] The first gear 542 can have a first opening 552. Likewise, the fourth gear 548 can have a second opening 554. The first opening 552 and the second opening 554 can each be a bushing for their respective gear. The first opening 552 can accommodate the first shaft 524. When accommodated by the first opening 552, the first shaft 524 can rigidly couple the first gear 542. The first shaft 524 can be rigidly coupled to the first gear 542 via a splined connection, with the splined shafts of the first shaft 524 and the splined shafts of the first gear 542 meshing. In the same way, the second opening 554 can accommodate the fourth shaft 530. When accommodated by the second opening 554, the fourth shaft 530 can rigidly couple the fourth gear 548. The fourth shaft 530 can rigidly couple the fourth gear 548 via a splined connection, with splined shafts of the fourth shaft 530 and splined shafts of the fourth gear 548 fitting together.

[0058] Fig. Figure 6 shows a third view 600 of the gear assembly 416. The third view 600 is a sectional view. The third view 600 is the view from the motor side, with the y-axis positive to the view. The third view 600 is on the first line 504 of Fig. 5 recorded. The third view 600 shows that the first axis 404, the second axis 406, the fourth axis 512 and the fifth axis 514 can be at different heights with respect to the z-axis.

[0059] The gearbox housing 430 contains a cavity 622. The cavity 622 can surround and accommodate the gear train 522. The first gear 542 can be radially centered about the first axis 404, the first axis 404 being a rotational axis for the first gear 542. The second gear 544 can be radially centered about the fourth axis 512, the fourth axis 512 being a rotational axis for the second gear 544. The third gear 546 can be radially centered about the fifth axis 514, the fifth axis 514 being a rotational axis for the third gear 546. The fourth gear 548 can be radially centered about the second axis 406, the second axis 406 being a rotational axis for the fourth gear 548. In other words, the first gear 542, the second gear 544, the third gear 546 and the fourth gear 548 can rotate radially around the first axis 404, the fourth axis 512, the fifth axis 514 and the second axis 406 respectively.

[0060] The gearbox housing 430 contains a multitude of first holes 632. The third fastening elements 466 of Fig. Four can extend through the holes 632. The first cover 432 can be attached to the gearbox housing 430 via the third fastening elements 466 and the first holes 632. For example, several first fastening elements, such as threads, can extend inward from the gearbox housing toward and opposite the first holes 632. The third fastening elements 466 can comprise a variety of second fastening features that can mesh with the first fastening features, thereby securing the third fastening elements 466 to the first holes 632.

[0061] Fig. Figure 7 shows a fourth view 700 of the differential assembly 414 and the gear assembly 416. The fourth view 700 is a sectional view. The fourth view 700 shows a sixth axis 712. The sixth axis 712 can be a longitudinal axis. The components of the separating device 440 can be centered about the sixth axis 712 and displaced along this axis. The components of the separating device 440 can be displaced in directions parallel to the sixth axis 712. More precisely, the components of the separating device 440 can be displaced in a first direction 704 or a second direction 706 parallel to the sixth axis 712, which can be longitudinal or transverse directions. The first direction 704 is opposite to the second direction 706. The first direction 704 and the second direction 706 can be represented by arrows.

[0062] The differential assembly 414 can include a pinion 716 and be coupled to it. The third shaft 528 can include a pinion 716 or be rigidly coupled to it. The pinion 716 is a drive that can be coupled to the drive shaft 412 via the differential of the differential assembly 414. For example, the pinion 716 can mesh with a ring gear of the differential of the differential assembly 414. Different power transmission ratios can be achieved by increasing or decreasing the ratio between the pinion 716 and the ring gear. For example, the power transmission ratio can be increased by increasing the pitch diameter of the pinion 716 and / or the ring gear. Likewise, the power transmission ratio can be decreased by decreasing the pitch diameter of the pinion 716 and / or the ring gear.

[0063] The separating device 440 can be housed above the differential carrier 442. The separating device 440 is a separating assembly comprising: a fork 718, a piston 722, a second cover 724, a spring 726, a switch 730, the third shaft 528, the pinion 716, and the clutch 532, wherein the clutch 532 comprises the clutch gear 534 and the second gear 544. The differential carrier 442 can have a cavity 720 in which the piston 722 and the spring 726 are arranged (or partially fill the cavity 720). The piston 722 and the spring 726 can be centered on the sixth shaft 712, such that they are positioned radially around it. The fork 718 is a shift fork for the separating device 440. The spring 726 can be a return spring for the piston 722. The spring 726 can be arranged radially around the piston 722, and the spring 726 can be arranged between the fork 718 and the differential carrier 442.More precisely, the spring 726 is located between the fork 718 and a hole in the differential carrier 742. The spring 726 can bear against the fork 718 and the differential carrier 442 and press against the fork 718, the piston 722, and the differential carrier 442. The second cover 724 can be attached to the gearbox housing 430 and the differential carrier 442, with the second cover 724 facing the spring 726 and the differential carrier hole 742 with respect to the piston 722. The second cover 724 is a piston cover that can cover and surround at least part of the piston 722. The second cover 724 can cover the cavity 720 and separate it from the installation space surrounding the drive axle assembly 402. The fork 718 can be rigidly coupled to the piston 722, so that the displacement of the piston 722 along the sixth axis 712 can displace the fork 718 in a direction parallel to the sixth axis 712.The fork 718 can extend downwards from the piston 722 and be switchably coupled to the clutch 532, so that the clutch 532 can change its state with the displacement of the fork 718. In particular, the fork 718 can be rigidly coupled to the clutch gear 534. A first end of the fork 718 can be rigidly coupled to the piston 722, and a second end of the fork 718 can be coupled to the clutch gear 534, the first and second ends being opposite each other. To rigidly couple the clutch gear 534, the fork 718 can be fixed in a slot 732 formed by the clutch gear 534. The clutch gear 534 can be attached to the third shaft and / or the pinion 716 via a splined connection.

[0064] The second cover 724 can be rigidly coupled to the differential carrier 442 by means of a variety of fasteners 734. The second cover 724 can be a piston cover for the piston 722. The second cover 724 can enclose the piston 722 and the spring 726 in the cavity 720 when the second cover 724 is fixed and physically coupled to the differential carrier 442. The second cover 724 includes a port 728. The port 728 can be a port for hydraulic fluid through which fluid, e.g., hydraulic fluid, can enter the cavity 720. Hydraulic fluid from the port 728 can actuate the piston 722 by translation.

[0065] For example, the piston 722 can be pressurized with hydraulic pressure through the port 728 to move the piston 722 and thus the fork 718. An actuating chamber can be arranged between the piston 722 and the port 728, which can expand or contract as the piston 722 is moved further or closer to the port 728. When the pressure is increased beyond a first threshold value, the force of the hydraulic pressure on the piston 722 becomes greater than the spring force of the spring 726. The spring 726 can be compressed in the second direction 706, and the piston 722 and the fork 718 can be displaced in the second direction 706. By displacing the piston 722 and the fork 718 in the second direction 706, the clutch gear 534 is moved away from the second gear 544 in the second direction. After the clutch gear 534 has been moved in the second direction 706 beyond a second threshold, the clutch 532 can open.When the clutch 532 opens, the clutch gear 534 is disengaged from the second gear 544, and the third shaft 528 and the pinion 716 can optionally be disengaged from the second gear 544. The spring 726 serves as a return spring for the disengaging device 440 to restore the position of the piston 722 and the fork 718. To close the clutch 532 and lock the clutch gear 534 with the second gear 544, the hydraulic pressure between the second cover 724 and the piston 722 is reduced to or below the first threshold value. The spring 726 can then extend in the first direction 704, and the spring force of the spring 726 can push the piston 722 and the fork 718 back into their initial position.

[0066] The switch 730 can send electronic signals to a hydraulic actuation system, which supplies hydraulic fluid to port 728. More precisely, the switch can be communicatively coupled to a control system for the hydraulic actuation system and send electronic signals to it to supply hydraulic fluid to port 728. The switch 730 can be a magnetic switch. The switch 730 includes a contacting element 736. The contacting element 736 can engage with a feature of the fork 718, such as a hole or other opening. Additionally or alternatively, the piston 722 can have another feature with which the contacting element 736 engages. The movement of the fork 718 and / or the piston can push the contacting element 736 upwards from the feature or other feature by translation or other movement.Actuation of contact 736 can cause switch 730 to send signals to components of a control system, including a control unit for the hydraulic system. Upon receiving the signals from switch 730, the control unit processes the received signals and uses various actuators to adjust the pressure based on the received signals and the instructions stored in the control unit's memory. The control unit can be a microcomputer, including components such as a microprocessor unit, input / output ports, an electronic storage medium for executable programs and calibration values ​​(e.g., a read-only memory chip), working memory, diagnostic memory, and a data bus.The storage medium can be programmed with computer-readable data representing commands that can be executed by a processor to perform the procedures described below, as well as other variations that are expected but not explicitly listed. Depending on the operation and the instructions on the controller, the controller can adjust valves and other actuators of the hydraulic system to increase or decrease the pressure to the port. For example, switch 730 can send a signal to the controller and control system, and the controller and control system can reduce the hydraulic pressure to port 728 to prevent, for example, overpressure between port 728 and piston 722.Another example: Switch 730 can send a signal to the control and control system, and the control and control system can increase the hydraulic pressure to port 728 to prevent the piston and fork from returning to a starting position below a certain time interval.

[0067] The separating device 440 can also include a first seal 752 and a second seal 754. The first seal 752 can be arranged radially between the second cover 724 and the piston 722. The first seal 752 can be mounted and secured in a groove of the piston 722. The first seal 752 is a piston seal that can seal the piston 722 with the housing elements, including the second cover 724. The second seal 754 is mounted between the second cover 724 and a mating surface of the differential carrier 442. The second seal 754 can be arranged axially along the sixth axis 712 between the second cover 724 and the differential carrier 442, for example, between the second cover 724 and the transmission housing 430. The second seal 754 can be an O-ring seal.

[0068] The third shaft 528 and the pinion 716 can be supported by a first bearing arrangement 762 and a second bearing arrangement 764. The first bearing arrangement 762 and the second bearing arrangement 764 can be arranged around the third shaft 528. More precisely, the first bearing arrangement 762 and the second bearing arrangement 764 can be arranged radially around the third shaft 528. The first bearing arrangement 762 and the second bearing arrangement 764 can each contain one or more bearings, which can alternatively be referred to here as pinion bearings. The pinion bearings of the first bearing arrangement 762 and the second bearing arrangement 764 can, for example, be roller bearings, in particular tapered roller bearings. The first bearing arrangement 762 and the second bearing arrangement 764 can be secured with a lock nut 766. The lock nut 766 can be attached to the third shaft 528 and / or to the pinion 716.The lock nut 766 can secure the first bearing assembly 762 and the second bearing assembly 764 between the pinion 716 and the clutch gear 534. The lock nut 766 can prevent movement of the first bearing assembly 762 and the second bearing assembly 764 in an axial direction along the fourth axis 512. For example, the lock nut 766 can prevent movement of the first bearing assembly 762 and the second bearing assembly 764 in the first direction 704. The first bearing assembly 762 and the second bearing assembly 764 can allow the third shaft 528 and the pinion 716 to rotate independently of the differential carrier 442 and the gearbox housing 430.

[0069] In Fig. 8A and Fig. Figure 8B shows a fifth view 800 of the differential assembly 414 and the gear assembly 416. The fifth view 800 is a sectional view, and the fifth view 800 is on the same plane as the second view 500. Fig. 5 can be recorded.

[0070] Fig. Figure 8A shows the disconnecting device 440 shifted so that the coupling 532 is closed. More precisely, in Fig. 8A the coupling gear 534 is engaged so that it engages with the second gear 544 and is optionally coupled. Fig. Figure 8A shows a power flow represented by a plurality of first arrows 862. The power flow can be split into a first and a second branch at the coupling 532. The first branch is represented by a plurality of second arrows 864 and the second branch by a plurality of third arrows 866. Following the first arrows 862, the electric machine 418 drives the first input 436 and the first shaft 524. The first gear 542 is driven via the first shaft 524, and the first gear 542 drives the second gear 544. The torque can be split into the first and second branches at the second gear 544 by the coupling 532. Following the second arrows 864, the coupling gear 534, the third shaft 528, and the pinion 716 can be driven by the second gear 544. The pinion 716 can drive the drive shaft 412, e.g. by driving a differential via a ring gear.Following the third arrows 866, the second gear 544 can drive the third gear 546, and the third gear 546 can drive the fourth gear 548. The second input 438 and the fourth shaft 530 can be driven by the fourth gear 548. The second input 438 can drive the hydraulic pump assembly 420.

[0071] In Fig. 8B, the separating device 440 is shifted so that the coupling 532 is open. More precisely, in Fig. 8B The clutch gear 534 is not engaged and therefore not coupled to the second gear 544. The clutch gear 534 may be separated from the second gear by a gap 832. The gap 832 is greater than a threshold value, so that the clutch gear 534 does not engage with or touch the second gear 544. Fig. Figure 8B shows a second power flow, represented by a multitude of fourth arrows 868. The fourth arrows 868 follow the path of the first arrows 862 and the third arrows 866 of Fig. 8A, wherein the second power flow can drive the same components as the first power flow, except for the components driven via the first branch. The second gear 544 is decoupled from the coupling gear 534 and the third shaft 528, and the pinion 716 can remain undriven while the second gear 544 is driven. Downstream of the second gear 544, the fourth arrows 868 follow the path of the third arrows 866 from Fig. 8A, with the second power flow being able to drive the same components as the second branch.

[0072] The gear train 522 can be supported by a variety of bearings and / or bearing arrangements. For example, the first gear 542 can be supported by a third bearing arrangement 842. The second gear 544 can be supported by a fourth bearing arrangement 844 and a fifth bearing arrangement 846. The third gear 546 can be supported by a sixth bearing arrangement 848 and a seventh bearing arrangement 850. And the fourth gear 548 can be supported by an eighth bearing arrangement 852.

[0073] The third bearing arrangement 842 can be arranged around the first gear 542. More precisely, the third bearing arrangement 842 can be arranged radially around a projection of the first gear 542. The third bearing arrangement 842 can be arranged radially between the first gear 542 and the transmission housing 430 and / or the differential carrier 442.

[0074] The fourth and fifth bearing arrangements 844, 846 can be arranged radially around the second shaft 526. The fourth and fifth bearing arrangements 844, 846 can be arranged radially between the second gear 544 and the second shaft 526. The fourth and fifth bearing arrangements 844, 846 can allow the second gear 544 to rotate independently of the second shaft 526.

[0075] The sixth and seventh bearing arrangements 848, 850 can be arranged radially around the third gear 546. More precisely, the sixth and seventh bearing arrangements 848, 850 can each be arranged radially around a projection of the third gear 546. The sixth bearing arrangement 848 can be arranged radially between the third gear 546 and the first cover 432. The seventh bearing arrangement 850 can be arranged radially between the third gear 546 and the transmission housing 430 and / or the differential carrier 442.

[0076] The eighth bearing assembly 852 can be arranged around the fourth gear 548. More precisely, the eighth bearing assembly 852 can be arranged radially around a projection of the fourth gear 548. The eighth bearing assembly 852 can be arranged radially between the fourth gear 548 and the transmission housing 430, or the eighth bearing assembly 852 can be arranged radially between the fourth gear 548 and the differential carrier 442.

[0077] The presented system thus provides a drive axle assembly comprising a gearbox with two inputs: a first input for mounting the electric motor and a second input for mounting the power take-off (PTO) and / or the vibration pump. Under normal operating conditions, the electric motor can drive the drive axle for traction and, simultaneously, the PTO. The gearbox includes a disengagement mechanism with a disengaging clutch. The disengagement mechanism and the disengaging clutch can be hydraulically actuated. The disengagement mechanism is designed to supply power to the PTO when neither traction nor drive of the drive axle is desired. The disengaging clutch can be engaged to selectively couple the drive train and distribute the torque between the PTO and the drive axle.The disconnect clutch can open to supply torque to the power take-off (PTO) and prevent that torque from being transmitted to the drive axle. The disconnect clutch can be a jaw clutch comprising an intermediate gear of the transmission and a clutch gear. The clutch gear can be coupled to and driven by a shaft rigidly connected to a pinion. The pinion can mesh with and drive the gears of a differential on the drive axle. The clutch gear can engage with the intermediate gear to close the disconnect clutch and selectively couple the intermediate gear to the shaft and pinion. In the locked position, the pinion can be driven by the electric motor.

[0078] Although various embodiments have been described above, it should be clear that these serve only as examples and do not represent limitations. Those skilled in the art will recognize that the disclosed subject matter can be implemented in other specific forms without departing from the spirit of the subject matter. The embodiments described above are therefore to be regarded in every respect as illustrative and not as limiting. Thus, the configurations and routines disclosed here are exemplary in nature, and the specific examples are not to be considered limiting, as numerous variations are possible. The technology described above can, for example, be applied to drive trains that include various types of drive sources, including different types of drive motors and / or gearboxes.The subject matter of this disclosure includes all novel and non-obvious combinations and sub-combinations of the various systems and configurations, as well as other features, functions and / or properties disclosed herein.

[0079] It should be noted that the example control and estimation routines contained herein can be used with various configurations of the engine, electric machine, transmission, and / or vehicle system. The control methods and routines disclosed herein can be stored as executable instructions in non-volatile memory and executed by the control system, including the controller, in combination with the various sensors, actuators, and other engine hardware. The specific routines described herein can represent one or more arbitrary processing strategies, such as event-driven, interrupt-driven, multitasking, multithreading, and the like. Thus, the various actions, operations, and / or functions presented can be performed in the sequence shown, in parallel, or, in some cases, independently.Accordingly, the processing sequence is not strictly necessary to achieve the features and advantages of the exemplary embodiments described here, but serves only for better illustration and description. One or more of the actions, operations, and / or functions shown can be performed repeatedly, depending on the strategy used. Furthermore, the described actions, operations, and / or functions can graphically represent code that is to be programmed into the non-volatile memory of the computer-readable storage medium in the engine control system, whereby the described actions are executed by carrying out the commands in a system that includes the various hardware components of the engine in combination with the electronic control unit.

[0080] It is understood that the configurations and processes disclosed here are exemplary and that these specific examples are not to be considered restrictive, as numerous variations are possible. The subject matter of this disclosure includes all novel and non-obvious combinations and sub-combinations of the various systems and configurations, as well as other features, functions, and / or properties disclosed herein.

[0081] The following claims highlight in particular certain combinations and subcombinations that are to be considered novel and not obvious. These claims may refer to "one" element or "a first" element, or the equivalent thereof. Such claims are to be understood as including one or more such elements, with two or more such elements neither required nor excluded. Other combinations and subcombinations of the disclosed features, functions, elements, and / or properties may be claimed by amending the present claims or by filing new claims in this or a related application. Such claims, whether they have a broader, narrower, the same, or different scope than the original claims, are also to be considered as included in the subject matter of the present disclosure.

Claims

[1] Powertrain, comprising: a drive axle; a transmission connected to the drive axle, wherein the transmission comprises a transmission train, the transmission train comprising an input gear, an intermediate gear, a PTO output gear and a disconnect clutch configured to selectively couple the intermediate gear to the drive axle; an electric motor, wherein the electric motor is mounted on the transmission in the longitudinal direction of the vehicle and coupled to the input gear; and a power take-off device that is mounted on the gearbox next to the electric motor and coupled to the PTO output gear. [2] Drive axle according to claim 1, further comprising a piston, a spring, a fork and a switch, wherein the fork is rigidly coupled to a locking element of the disconnecting coupling and the spring presses on the fork, wherein the piston is hydraulically driven, the piston displaces the fork and the fork displaces the locking element of the disconnecting coupling. [3] Drive axle according to claim 2, wherein the disconnect coupling is a claw coupling and the locking element is a coupling gear, wherein the coupling gear meshes with the intermediate gear. [4] Drive axle according to claim 2 or 3, wherein the intermediate gear is optionally coupled to a shaft by closing the disconnect coupling, wherein the locking element is rigidly coupled to the shaft and the shaft is rigidly coupled to a pinion. [5] Drive axle according to claim 4, wherein the shaft and the pinion are supported by a plurality of bearing arrangements and the bearing arrangements are secured by a lock nut. [6] Drive axle according to one of the preceding claims, wherein the gear train comprises a wheel, the input gear meshes with the intermediate gear, the intermediate gear meshes with the wheel and the wheel meshes with the PTO output gear. [7] Drive shaft according to one of the preceding claims, wherein the intermediate gear is arranged radially around a shaft, wherein the intermediate gear is supported around the shaft by a first bearing arrangement and a second bearing arrangement, wherein the first bearing arrangement and the second bearing arrangement are arranged radially between the intermediate gear and the shaft. [8] Drive shaft according to one of the preceding claims, wherein the auxiliary power device is a pump arrangement comprising a first pump, wherein the first pump has a first axis of rotation, wherein the rotating elements of the first pump rotate about the first axis of rotation, wherein the first axis of rotation is parallel to a second axis of rotation, wherein rotating elements of the electric motor rotate about the second axis of rotation. [9] Drive axle according to claim 8, wherein the auxiliary power unit is an arrangement of pumps of a tandem configuration which includes a second pump, wherein the second pump has the first axis of rotation, wherein rotating elements of the second pump rotate about the first axis of rotation.

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