DE7711176U1 - LUBRICATION DEVICE FOR TRANSMISSION OR THE LIKE IN START-UP - Google Patents

Description

W * rtc II.

and ZahnraMMk

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Unto M

, d «a April 7, 1977 2503 Llch / We 393 OO PL (& (k7

Lubricating equipment for gearboxes or the like, in the start-up state

The invention relates to a lubricating device such as this is described in the preamble of the main claim. A lubrication device for the start-up condition is already known, which has a lubricant reservoir which is opened by means of an electromagnet when starting up. Through this oil is fed to the gearbox before the oil pump takes effect. This facility works satisfactorily in itself, but is not suitable for larger gears and extensive piping systems (because of the long time for the pump to take effect), because the freely flowing oil is insufficient in terms of time and / or volume. In addition, there is a power source for electromagnetic valve not always available. (DT-PS 1 291 966)

Therefore, the invention is based on the object to create a lubricating device of the type described above, which the With a practically sufficient volume of lubricant, the transmission allows a practically unlimited period of time to be driven. According to the invention this is done with splash lubrication. Since this splash lubrication results in splashing losses and for some applications * also others Can have disadvantages, it is a further task to automatically switch to pressure spray or mist lubrication or the like. In addition, there is an external energy for the electromagnetic Switching valve or the like should be avoided.

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The object underlying the invention is achieved with a lubricating device that has the features of the main claim. Filling up from the second level to the first level for the start-up splash lubrication can be done with a special device that is refilled while the gearbox is in operation, this can be, for example, a special container that is emptied into the sump when the gearbox is switched off, either through free Case. Or by means of a stored pressure. The features of claim 2 result in a particularly simple device. Between the lubricant sump and the reservoir can a Pump or several pumps can be provided in order to lower the level of the sump according to the invention. A simple setup result in the features of claim 3> Another advantageous embodiment of the invention results in this Feature of claim 4.

The concept of free fall should also include communicative Tubes or the like. Fall.

Further advantages and features of the invention are apparent from the following To be found in the description.

The invention is based on a schematically sketched embodiment explained.

1 with a gear housing is referred to in the sketch in which a number of gear elements such as gears 2, 3 are rotatably mounted. A lubricant sump, hereinafter referred to as oil sump k , is provided in the transmission housing. The oil drop can assume an upper level 5, which is determined with a first «in overflow pipe 6. Furthermore, a lower level 7 is provided, which is determined with a second overflow pipe 8,

The pipes and lines ™ directly connected to the gear unit are marked with double edges, as are the overflow pipes, all other lines are echematiach with simple lines shown.

The first overflow pipe 6 leads directly into a storage container

9 in such a way that the oil from the sump in the reservoir

free fall flows. The second overflow pipe first leads into a pressure valve 10, whose valve slide is not shown od. The like. On the one hand, via a line 11, the pressure of the line system described below is applied and the

* is on the other hand loaded by an adjustable spring 12.

Such pressure valves are commercially available. The second overflow pipe 8 is also connected to the storage container via said pressure valve and via a drain line 13.

A pump LA sucks the lubricant, in the example oil, through a suction line 15 from the reservoir and presses it through pressure lines l6,17, a filter 18, an oil cooler 19 and a feed line 20 in the gear housing, where it is distributed by means of lubrication lines 21.

The line mentioned above branches off on the pressure side of the pump 11 to the pressure valve. The oil cooler is connected to cooling lines 22, 23.

The supply line 20 whose volume inen by "drawn Zuaatzbehälter can not be increased, is dimensioned and arranged so that after switching off the pump" Ik the transmission case as much oil flows that the oil reservoir in Suwpf 4 from the bottom (7) on the top level (5) is replenished.

The drive for the pump 1Λ can be any. It's a special one Advantage of the invention that the pump can be driven synchronously with the transmission, e.g. by this. the I. The pump doesn't need to run any longer than the gearbox

; | Oil supply in the sump is replenished independently of the pump.

I The 01 for the sump 7 runs from the transmission from the feed line

,; through free fall. Should the pipe system be so tight

I be that the oil does not free fall through the lubrication line 21 I, adequate ventilation must be provided, given

y if with a non-return valve to the outside, which at pressure in

I line system closes off to the outside and when the pressure drops I (stationary pump) opens for ventilation.

ti When starting up, the gearbox runs for practically any length of time

I Splash lubrication (upper level 5). Only after the pump has the

'"Has built up pressure for pressure or spray lubrication, runs f; the oil down to the lower level 7, so that the transmission then

'■' works without splashing losses.

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List of terms

1 gear housing

² )

" \ Gears

4 oil sump

5 upper level

6 first overflow pipe

7 lower level

8 second overflow pipe

9 storage container

10 pressure valve

11 lead

12 adjustable spring

13 Drain line

14 pump

15 suction line

16)

) Pressure lines

18 filters

19 oil cooler

20 supply line

21 lubrication lines

22)

) Cooling lines

Claims (4)

EXPECTATIONS 1. Lubricating device for gearboxes or the like in the start-up state with a reservoir for the lubricant, e.g. oil, oil pump and pressure control valve, characterized by the following features: a. the reservoir (9) is separate from the lubricant sump (4) of the transmission (l) arranged; b. a first overflow pipe (6) connects the lubricant sump (4) with the reservoir (9) and is set up on an upper lubricant level (5) into the rotating Submerge gear parts, e.g. at least »one gear (3)»; c. a second overflow pipe (8) connects the lubricant sump (4) with the reservoir (9) and is on a Lower lubricant level (7) set up, into which rotating parts of the gear (e.g. 3) are not immersed; d. a pump (l4), which the lubricant from the reservoir (9) in the gear housing for a pressure or Splash lubrication pumps; e. in the line of the second overflow pipe (8) is a Pressure valve (10) is provided, which opens the connection between the sump (4) at a pressure generated by the pump (l4) and storage container (9) opens. 2. Lubricating device according to claim 1, characterized in that the line system (l6 to 20) connected downstream of the pump (14) is arranged so that the gear housing Cl) ■ * · «I * π ft free fall in a volume of the lubricant
can that the difference between the second (7) and the first lubricant level (5) is filled after switching off the pump (ΐΛ. 3. Lubricating device according to claim 1, characterized in that the lubricant from the lubricant pool (k) the
Reservoir runs up by free fall. 4. Lubricating device according to claim 1, characterized in that . that the pressure valve (1O) is adjustable.