Patent Application
20190293234
The present invention relates to a drive device.
Drive devices generally may generate waste heat.
Example embodiments of the present invention provide a drive device for which the simplest production possible as well as high tightness are to be achieved.
According to example embodiments of the present invention, a drive device includes a gear unit, which is able to be driven by a motor and has a pressure-lubrication system, the pressure-lubrication system having a distributor block, the distributor block having a continuous longitudinal bore and continuous transverse bores, the distributor block being produced as a single piece, in particular from metal such as steel or aluminum.
This offers the advantage that a simple production is possible as a result of the single-piece configuration of the distributor block. In addition, high tightness is achievable in this manner. This is because a configuration using multiple pieces would require the provision of appropriate seals. According to example embodiments of the present invention, however, only a number of bores have to be implemented in the distributor block.
In example embodiments, an oil pump, in particular an oil pump driven by an electric motor, supplies oil from the oil sump of the gear unit into a first opening of the longitudinal bore, in particular with the aid of a conduit. This is considered advantageous inasmuch as a motor-powered oil delivery is provided.
In example embodiments, an oil conduit leads from a first transverse bore to the interior of the gear unit, the first transverse bore having a larger cross-section than any of the other transverse bores. This has the advantage that oil that has flowed into the longitudinal bore must be distributed into the transverse bore. In this distribution, a valve may be provided by which the oil flow is able to be controlled.
In example embodiments, a valve for interrupting the oil flow from the longitudinal bore to the first transverse bore is arranged in the distributor block, in particular inside the longitudinal bore. This offers the advantage that the distribution of the oil from the longitudinal bore into the transverse bore is able to be controlled with the aid of a valve.
In example embodiments, the longitudinal bore has a constriction. This is considered advantageous insofar as it allows for the placement of a valve in that a movably disposed ball is able to be pressed against the constriction or pressed away from the constriction. Depending on the position of the ball, the oil flow is either hampered or not hampered.
In example embodiments, the longitudinal bore includes a first region in which the cross-section is smaller than in two regions that abut the first region and that are set apart from each other by the first region, the longitudinal bore in particular being implemented as a stepped bore. This offers the advantage that a constriction is easily able to be produced by initially implementing the longitudinal bore as a stepped bore, i.e. by longitudinally implementing a first continuous bore, whereupon a blind-hole bore, i.e. a bore that is not continuous, having a greater bore diameter is implemented in parallel and centrally with respect to the first bore from both sides of the outlet of the first bore in the direction of the environment. As a result, the longitudinal bore including the constriction is able to be produced by three drilling processes.
In example embodiments, one sensor or a plurality of sensors is provided in the further transverse bores, in particular a temperature sensor, a pressure sensor, a pressure-dependent switch or a temperature-dependent switch being positioned as a sensor. This has the advantage that a tight connection of the sensors is able to be carried out since the distributor block is produced as a single piece. In addition, different sensors may be mounted on the distributor block, in particular on the respective outlet opening of the respective transverse bore. The pressure or temperature is therefore easily acquirable.
In example embodiments, a filter is connected to the distributor block. This has the advantage that the oil distributed by the distributor block is able to be filtered.
In example embodiments, threaded bores are introduced into the distributor block, in particular for the attachment of sensors and/or connection parts for the conduit. This is considered advantageous insofar as a simple and sturdy attachment is able to be provided.
A respective bore pattern is implementable in square form, in particular such that the center point of the bore pattern is disposed in the center of the bore.
In example embodiments, the valve has a ball which is connected to a restoring element, the restoring element in particular being a spring element, which is connected to the distributor block by a first end region and connected to the ball via an end region that is set apart from the first end region. This offers the advantage of allowing for a rapid and simple production.
Further features and aspects of example embodiments of the present invention are described in greater detail below with reference to the appended Figures.
As illustrated in
This longitudinal bore has a constriction in a central region of distributor block 1.
Upstream and downstream from the constriction, distributor block 1 has transverse bores (3, 4, 5, 6).
At a greater distance from the constriction, distributor block 1 also has a further transverse bore 8.
Distributor block 1 includes threaded bores 7, which, for example, are disposed in a square bore pattern, for the attachment of further devices, the bore axis of the respective transverse bore being disposed at a centrical alignment through the bore pattern.
The devices are therefore connectable to the distributor block in each case, in particular with the aid of screws.
A valve, for instance, may be positioned at the constriction, and a ball by which the continuous longitudinal bore is able to be sealed at its constriction is attached to a restoring element, which is connectable to distributor block 1 with the aid of a friction-locked connection or a keyed connection.
A valve behavior is therefore easily achievable. In a first flow direction of the coolant, ball 30 is pressed against the constriction, and in the other flow direction, ball 30 is pressed away from the constriction. The threshold values for the pressure difference are taken into account with the aid of restoring element A5.
As is furthermore illustrated in
A water inlet RA and a water outlet RB are also situated on cooling element 33. The oil conveyed through cooling element 33 is supplied to longitudinal bore 2 at the other opening of longitudinal bore 2.
The transverse bores (3, 4, 5, 6, 8) penetrate longitudinal bore 2 and thereby induce a distribution of oil.
Coming from distributor block 1, the oil is guided out via transverse bore 3, which has the largest cross-section among the transverse bores (3, 4, 5, 6, 8), and conveyed to the gear unit with the aid of the oil conduit.
Situated in the other transverse bores (4, 5, 6, 8) in each case is a sensor, such as temperature sensor 34 or pressure sensor 35, or a switch such as a pressure-dependent switch 37, temperature switch 71, in particular a temperature-dependent switch, or temperature switch 72, in particular a temperature-dependent switch. A display A3 is provided on temperature sensor 34, and a display A4 on the flow sensor.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2016 008 377.8 | Jul 2016 | DE | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2017/025165 | 6/12/2017 | WO | 00 |
