CN219221223U - Transfer case lubrication system for work machine and work machine with transfer case lubrication system - Google Patents

Abstract

The utility model relates to a transfer case lubrication system for a work machine, comprising a transfer case and an oil pump, characterized in that the transfer case lubrication system further comprises an engine oil sump, wherein a lubrication oil outlet of the transfer case is fluidly connected with an oil pump inlet, the oil pump outlet is fluidly connected with a first oil inlet of the engine oil sump, and the first oil outlet of the engine oil sump is fluidly connected with the transfer case lubrication oil inlet. The utility model also relates to a working machine with the transfer case lubrication system.

Description

Transfer case lubrication system for work machine and work machine with transfer case lubrication system

Technical Field

The present utility model relates to a transfer case lubrication system for a work machine and a work machine having the transfer case lubrication system.

Background

Transfer cases are currently provided on work machines to enable transmission and distribution of mechanical power. The transfer case is powered by a gear mechanism disposed within the transfer case. The high-speed motion of the gear trains can generate heat, the lubricating oil used for reducing friction between gears can also be accompanied by an increase in temperature, the lubrication failure can be caused by an excessively high temperature, the abrasion of the gears can be accelerated, and even a large safety accident can be possibly caused.

Accordingly, the present utility model is directed to one or more improvements over the prior art.

Disclosure of Invention

In view of the shortcomings of the prior art, the present utility model proposes an improved technique for a transfer case lubrication system for a work machine that allows the transfer case lubrication needs as well as the cooling needs to be effectively addressed without increasing the complexity of the cooling system design.

According to one aspect of the present utility model there is provided a transfer case lubrication system for a work machine comprising a transfer case and an oil pump, characterized in that the transfer case lubrication system further comprises an engine oil sump, wherein a lubrication oil outlet of the transfer case is fluidly connected to an oil pump inlet, the oil pump outlet is fluidly connected to a first oil inlet of the engine oil sump, and the first oil outlet of the engine oil sump is fluidly connected to the transfer case lubrication oil inlet.

Advantageously, a filter is provided in the oil path between the lubricant outlet of the transfer case and the oil pump inlet to provide filtered oil to the oil pump.

Advantageously, the transfer case lubrication oil outlet is provided in the bottom of the transfer case housing; and/or the transfer case lubrication inlet is provided at the top of the transfer case housing.

Advantageously, the second oil outlet of the engine oil sump is fluidly connected to the oil-path inlet of the engine oil radiator, and the second oil inlet of the engine oil sump is fluidly connected to the oil-path outlet of the engine oil radiator.

Advantageously, the filter has a coarse filter element.

According to another aspect of the present utility model, there is provided a work machine including the transfer case lubrication system described above.

Advantageously, the work machine is a bulldozer.

The transfer case lubricating system provided by the utility model can be used for effectively cooling the transfer case lubricating oil in a centralized way by using the engine cooling system, so that the lubricating requirement and the cooling requirement of the transfer case are met.

Drawings

Exemplary embodiments of the present utility model are described with reference to the accompanying drawings, in which:

FIG. 1 is a schematic illustration of a transfer case lubrication system for a work machine of the present utility model.

Reference numerals:

1-a transfer case lubrication system;

11-a transfer case;

11_i-a lubricating oil inlet;

11_o-lube outlet;

12-an oil pump;

13-an engine sump;

13_i1—a first oil inlet;

13_o1—a first oil outlet;

13_i2—a second oil inlet;

13_o2—a second oil outlet;

20-an engine oil radiator;

w-cooling medium.

The figures are merely schematic and not necessarily to scale, and they show only those parts which are necessary in order to elucidate the utility model, other parts being omitted or merely mentioned. That is, the present utility model may include other components in addition to those shown in the drawings.

Detailed Description

The following describes the technical scheme of the present utility model in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model to those skilled in the art. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. Furthermore, it should be understood that the utility model is not limited to specific described embodiments. Rather, the utility model can be considered to be implemented with any combination of the following features and elements, whether or not they relate to different embodiments.

FIG. 1 illustrates a schematic view of a transfer case lubrication system for a work machine of the present utility model. As shown in fig. 1, the transfer case lubrication system 1 includes a transfer case 11 and an oil pump 12. The transfer case and the oil pump are fluidly connected by an oil line. The lubrication oil outlet 11—o of the transfer case 11 is fluidly connected to the oil pump inlet. The transfer case lubrication system 1 further comprises an engine oil sump 13. The oil pump outlet is in fluid connection with a first oil inlet 13_i1 of the engine oil sump 13, which first oil outlet 13_o1 is in fluid connection with a lubricant inlet 11_i of the transfer case. Thereby, a closed lubricating oil flow path is formed, and the gear train in the differential case is enabled to be lubricated by engine oil.

In the illustrated advantageous embodiment, a filter 14 is provided in the oil path between the transfer case's lube outlet and the oil pump inlet to provide filtered oil to the oil pump. The filter is a filter with a coarse filter element. The coarse filter element can prevent impurities from flowing into the oil pump and the engine, and prolongs the service lives of the oil pump and the engine. The transfer case lube outlet 11—o is advantageously provided at the bottom of the transfer case housing. Preferably, the transfer case lube inlet 11_i is provided at the top of the transfer case housing.

As shown in fig. 1, the second oil outlet 13_o2 of the engine oil pan 13 is fluidly connected to the oil-path inlet of the engine oil radiator 20, and the second oil inlet 13_i2 of the engine oil pan is fluidly connected to the oil-path outlet of the engine oil radiator 20. Therefore, the engine oil from the engine oil pan can be cooled by the engine oil radiator. The cooled engine oil may be split from the engine sump via a pipe into the transfer case 11 as lubricating oil to cool and lubricate the gear transmission system within the transfer case. Engine oil radiator 20 may use, for example, chilled water as cooling medium W to cool the engine oil.

Thus, according to the present utility model, a portion of the engine oil is diverted from the engine oil sump 13 to the transfer case top through the piping, flows through the gear train, and finally merges into the bottom of the case housing of the transfer case 11, and under the action of the negative pressure generated by the oil pump 12, the engine oil (a portion of the engine oil as transfer case lubricating oil) flows from the bottom of the case housing of the transfer case 11 through the piping and the filter 14 to the oil pump 12, and is returned to the engine oil sump 13 through the oil pump. In this way, a separate oil cooling mechanism is not required for the transfer case, and the cooling mechanism of the engine can be directly used for cooling. In addition, because the transfer case lubrication system can return the lubrication oil at the bottom of the transfer case back into the engine sump, a bottom chassis is no longer required, thereby reducing the volume of the transfer case.

Industrial applicability

To facilitate a better understanding of the present utility model, the following describes the specific principles of operation of the transfer case lubrication system for a work machine shown in fig. 1:

in the transfer case lubrication system according to the present utility model, a part of the cooled engine oil flows out from the engine oil pan 13 and flows into the top of the transfer case 11 through a predetermined line. At this time, engine oil that has entered the transfer case 11 serves as lubricating oil to lubricate the gear transmission system in the transfer case while cooling it. Finally, the lubricating oil flows to the bottom of the transfer case 11 and is collected, and flows through the filter 14 by the negative pressure generated by the oil pump 12. The oil filtered by the filter 14 enters the oil pump 12, then flows out from the outlet of the oil pump 12, and flows to a pipe leading to the engine oil pan 13. The oil in the engine oil pan is simultaneously cooled by the engine oil radiator 20. Thereby, it is ensured that the lubricating oil entering the transfer case is always at a suitable temperature for cooling the gear transmission system, while at the same time the lubrication characteristics of the lubricating oil are always kept consistent.

The transfer case lubrication system according to the present utility model may be used in a work machine such as a bulldozer to achieve the desired lubrication and cooling.

While the foregoing exemplary embodiments have been described in detail and with reference to the preferred embodiments thereof, it will be apparent to one skilled in the art that various other embodiments can be devised by modifying the disclosed embodiments without departing from the spirit and scope of the utility model. Such embodiments should be understood to fall within the scope of the utility model as determined based on the claims and any equivalents thereof.

Claims (7)

1. A transfer case lubrication system for a work machine comprising a transfer case and an oil pump, wherein the transfer case lubrication system further comprises an engine oil sump, wherein a lubrication oil outlet of the transfer case is fluidly connected to an oil pump inlet, the oil pump outlet is fluidly connected to a first oil inlet of the engine oil sump, and the first oil outlet of the engine oil sump is fluidly connected to the lubrication oil inlet of the transfer case.

2. The transfer case lubrication system of claim 1, wherein a filter is provided in the oil path between the transfer case lubrication oil outlet and the oil pump inlet to provide filtered oil to the oil pump.

3. The transfer case lubrication system of claim 2, wherein the transfer case lubrication oil outlet is provided in a bottom portion of the transfer case housing; and/or the transfer case lubrication inlet is provided at the top of the transfer case housing.

4. The transfer case lubrication system of claim 3, wherein the second oil outlet of the engine oil pan is fluidly connected to the oil range inlet of the engine oil radiator, and the second oil inlet of the engine oil pan is fluidly connected to the oil range outlet of the engine oil radiator.

5. The transfer case lubrication system of claim 4, wherein the filter has a coarse filter element.

6. A work machine, characterized in that it comprises a transfer case lubrication system according to one of claims 1-5.

7. The work machine of claim 6, wherein the work machine is a bulldozer.

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