CN217994166U - Range-extending type automobile - Google Patents

Abstract

An extended range vehicle comprising: the oil tank is filled with lubricating oil, the hydraulic pump is accommodated in the oil tank, and in operation, the hydraulic pump is at least partially immersed in the lubricating oil; the engine drives the generator to work, the generator drives the motor to work, and the engine also drives the hydraulic pump to pump lubricating oil to one or more of the engine, the generator and the motor. This application is through setting up the hydraulic pump in the oil groove, rethread engine drive hydraulic pump working method, make the lubricating oil that the hydraulic pump can pump in the oil groove, and with the lubricating oil pump send engine, any one in generator and the motor and more than, reach the lubricated purpose to above-mentioned three, and need not provide extra drive power for the hydraulic pump in this process, the kinetic energy that the engine produced in the complete utilization increases the form car, can practice thrift the energy output in the increase form car, improve the kinetic energy utilization ratio of increase form car.

Description

Range-extending type automobile

Technical Field

The application relates to the field of automobiles, in particular to a range extending type automobile.

Background

With the more serious phenomena of energy crisis and environmental pollution, the development of new energy electric vehicles is more and more emphasized. The extended-range automobile is a simple and feasible method for transforming the traditional internal combustion engine automobile. The range extender, the power battery and the motor are added in the power system, and the economy and the dynamic property of the whole vehicle are improved by driving the vehicle through the motor. When the range extender drives the motor to operate, the range extender can also charge the power battery, so that the energy utilization rate is greatly improved. However, because of the change of the kinetic energy transmission mode, the lubrication mode of the transmission system of the extended range type automobile is greatly different from the lubrication mode of the traditional internal combustion engine automobile, so that how to design an energy-saving lubrication mode suitable for the extended range type automobile becomes a key problem.

SUMMERY OF THE UTILITY MODEL

The application aims at providing a range extending type automobile, which utilizes kinetic energy generated by the working of an engine to drive a hydraulic pump to provide lubricating oil for any one or more of the engine, a generator and a motor, so that energy output in the range extending type automobile can be saved, and the kinetic energy utilization rate of the range extending type automobile is improved.

In order to achieve the purpose of the application, the application provides the following technical scheme:

the application provides a range extending type car includes: the lubricating oil tank is filled with lubricating oil, the hydraulic pump is accommodated in the oil tank, and in operation, the hydraulic pump is at least partially immersed in the lubricating oil; the engine drives the generator to work, the generator drives the motor to work, and the engine also drives the hydraulic pump to pump the lubricating oil to one or more of the engine, the generator and the motor.

In one embodiment, the engine includes an engine gear shaft set, the generator includes a generator gear shaft set, the hydraulic pump includes a pump impeller, the generator gear shaft set is respectively connected with the pump impeller and the engine gear shaft set, and the engine gear shaft set is transmitted to the pump impeller through the generator gear shaft set and drives the pump impeller to rotate.

In one embodiment, the engine gear shaft set comprises an engine main shaft and a first gear arranged on the engine main shaft, the hydraulic pump is connected with a gear oil spraying pipe, and the gear oil spraying pipe is used for conveying the lubricating oil to the first gear.

In one embodiment, the engine gear shaft set further includes a first bearing, the first bearing is disposed at one end of the engine main shaft, the hydraulic pump is connected to a bearing oil spray pipe, the bearing oil spray pipe is used for conveying the lubricating oil to the first bearing, and the bearing oil spray pipe is connected in parallel to the gear oil spray pipe.

In one embodiment, the bearing oil injection pipe is communicated with an inner cavity of the engine gear shaft set, the engine gear shaft set is provided with an outlet hole communicating the inner cavity with an external space, the outlet hole is located on a side of the first bearing, which faces away from the first gear, and the lubricating oil is delivered to the first bearing through the outlet hole.

In one embodiment, the engine gear shaft set further comprises a second bearing, the second bearing is arranged at the other end of the engine main shaft, and the bearing oil spray pipe is used for conveying the lubricating oil to the second bearing.

In one embodiment, the engine gear shaft set further includes a main shaft oil guide plate, the main shaft oil guide plate is located on a side of the second bearing facing away from the first bearing, the bearing oil spray pipe conveys the lubricating oil to an inner cavity of the engine gear shaft set through the main shaft oil guide plate, and the main shaft oil guide plate further conveys the lubricating oil to the second bearing.

In one embodiment, the generator gear set further comprises a generator rotating shaft and a second gear arranged on the generator rotating shaft, the gear oil spraying pipe is communicated with the hydraulic pump, and a pipe orifice of the gear oil spraying pipe is arranged between the first gear and the second gear.

In one embodiment, when the lubricating oil is further delivered to the electric motor, the extended range type automobile further comprises a motor oil injection pipe, the motor oil injection pipe is connected with the gear oil injection pipe in parallel, and the motor oil injection pipe delivers the lubricating oil to the outer side of the electric motor.

In one embodiment, the extended range type automobile further comprises an oil cooler and an oil inlet pipe, wherein the oil inlet pipe is connected with the oil cooler and the hydraulic pump, and the oil cooler is used for cooling lubricating oil in the oil inlet pipe.

In one embodiment, the extended range vehicle further includes a filter, the filter is accommodated in the oil tank and connected to the liquid inlet of the hydraulic pump, and the filter is used for filtering the lubricating oil in the oil tank.

This application is through setting up the hydraulic pump in the oil groove, rethread engine drive hydraulic pump working method, make the lubricating oil that the hydraulic pump can pump in the oil groove, and with the lubricating oil pump send engine, any one in generator and the motor and more than, reach the lubricated purpose to above-mentioned three, and need not provide extra drive power for the hydraulic pump in this process, the kinetic energy that the engine produced in the complete utilization increases the form car, can practice thrift the energy output in the increase form car, improve the kinetic energy utilization ratio of increase form car.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of an embodiment of a lubrication cooling method for an extended range vehicle gear;

FIG. 2 is a schematic view of an embodiment of a lubrication cooling method for a bearing of an extended range vehicle;

FIG. 3 is a schematic diagram of an embodiment of extended range vehicle lubrication fluid flow;

FIG. 4 is a schematic diagram of the flow of extended range vehicle lubrication fluid according to one embodiment.

Description of reference numerals: 11-oil groove, 12-filter, 13-hydraulic pump, 131-pump wheel, 14-oil inlet pipe, 15-oil cooler, 16-gear oil spraying pipe, 17-bearing oil spraying pipe, 18-motor oil spraying pipe, 21-engine gear shaft group, 210-engine main shaft, 211-first gear, 212-first bearing, 212B-second bearing, 213-main shaft oil guiding plate, 214-guiding hole, 22-generator gear shaft group, 221-second gear, 222-third bearing and 31-motor body.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The present application provides a range-extended vehicle, please refer to fig. 1, which includes: an oil groove 11 for containing lubricating oil, a hydraulic pump 13 arranged in the oil groove 11, wherein when in work, the hydraulic pump 13 is at least partially immersed in the lubricating oil; an engine, a generator and an electric motor, the engine driving the generator to operate, the generator driving the electric motor to operate, the engine also driving a hydraulic pump 13 to pump lubricating oil to one or more of the engine, the generator and the electric motor.

Specifically, the range extending automobile can comprise a range extending device, a battery, a chassis and an axle assembly, wherein the range extending device and the battery are installed on the chassis, and the range extending device is used for supplying power to the battery and driving the axle assembly so as to drive the range extending automobile to move. The range extender may include an engine and a generator, wherein the engine may operate by burning gasoline and the engine may then drive the generator to produce a continuous supply of electrical energy. The generator may be electrically connected to the motor and the battery and deliver the generated electrical energy to the motor and the battery. When the engine works, kinetic energy can be transmitted to the hydraulic pump 13 through the connected gear shaft, so that the hydraulic pump 13 is driven to work. Of course, the engine drives the hydraulic pump 13 in a manner that includes, but is not limited to, a geared drive and a belt-coupled drive.

Further, the hydraulic pump 13 may be accommodated in the oil sump 11 and immersed in the lubricating oil, whereby the lubricating oil may be drawn from the oil sump 11. The hydraulic pump 13 may pump the pumped lubricating oil to the engine, the generator or the motor through a pipe or a flow passage. In particular, the hydraulic pump 13 can pump lubricating oil to the gear shafts of the engine and the generator, thereby lubricating the places where the engine and the generator are drivingly connected, but of course cooling them as well. The hydraulic pump 13 may also pump lubricating oil to the housing of the electric motor, whereby the electric motor is cooled. Also, the hydraulic pump 13 may pump the lubricating oil to any one of or more of the engine, the generator, and the motor. For example, the hydraulic pump 13 may pump the lubricating oil to the engine or the generator only, or may pump the lubricating oil to the engine and the generator simultaneously, which is not limited in particular.

In one embodiment, the engine, generator and motor are located in the same communicating space as the oil sump 11, and the oil sump 11 is located below the three. In this way, when the hydraulic pump 13 pumps the lubricating oil to the three, the lubricating oil can flow back into the oil sump 11 under the action of gravity.

This application is through setting up hydraulic pump 13 in oil groove 11, rethread engine drive hydraulic pump 13 working method, make hydraulic pump 13 can pump the lubricating oil in the oil groove 11, and with lubricating oil pump send the engine, any one in generator and the motor and more than, reach the lubricated purpose to above-mentioned three, and need not provide extra drive power for hydraulic pump 13 in this process, the kinetic energy that the engine produced in the complete utilization increases the form car, can practice thrift the energy output in the increase form car, improve the kinetic energy utilization ratio of increase form car.

In one embodiment, referring to fig. 1, the engine includes an engine gear shaft set 21, the generator includes a generator gear shaft set 22, the hydraulic pump 13 includes a pump impeller 131, the generator gear shaft set 22 is respectively connected to the pump impeller 131 and the engine gear shaft set 21, and the engine gear shaft set 21 is transmitted to the pump impeller 131 through the generator gear shaft set 22 and drives the pump impeller 131 to rotate.

Specifically, the engine may include an engine gear shaft set 21 and the generator may include a generator gear shaft set 22. When the engine works, the engine can drive the engine gear shaft group 21 to rotate, and after the engine gear shaft group 21 is connected with the generator gear shaft group 22, the kinetic energy of the engine gear shaft group 21 can be transmitted to the generator gear shaft group 22, so as to drive the generator to generate electricity. When the pump impeller 131 of the hydraulic pump 13 is connected to the generator gear shaft set 22, the generator gear shaft set 22 may further drive the pump impeller 131 to rotate when rotating, thereby generating kinetic energy for the hydraulic pump 13. Moreover, the pump wheel 131 can be engaged with the generator gear shaft group 22 to take power, so that the hydraulic pump 13 can be driven to work under the condition of not providing external power, and the effect of saving energy consumption is achieved.

In one embodiment, referring to fig. 2 and fig. 3, the engine gear shaft set 21 includes an engine main shaft 210 and a first gear 211 disposed on the engine main shaft 210, the hydraulic pump 13 is connected to a gear oil spraying pipe 16, and the gear oil spraying pipe 16 is used for delivering lubricating oil to the first gear 211.

Specifically, the first gear 211 may be of unitary construction with the engine main shaft 210. One end of the gear oil spray pipe 16 may be connected to the liquid outlet of the hydraulic pump 13, and the other end of the gear oil spray pipe 16 may be opposite to the first gear 211, so that the gear oil spray pipe 16 may deliver the lubricating oil to the first gear 211. Also, the first gear 211 may be located above the oil sump 11, and the lubricating oil on the first gear 211 may flow back into the oil sump 11 by gravity and be re-circulated for the next lubrication cooling.

In one embodiment, the outlet of the gear oil spray pipe 16 may be located above the first gear 211, and below the first gear 211 may be the generator gear shaft set 22. The lubricating oil can flow down the first gear 211 to the generator gear shaft group 22 under the action of gravity, thereby lubricating and cooling the engine gear shaft group 21.

In one embodiment, referring to fig. 2 and fig. 3, the engine gear shaft set 21 further includes a first bearing 212, the first bearing 212 is disposed at one end of the engine main shaft 210, the hydraulic pump 13 is connected to the bearing oil spray pipe 17, the bearing oil spray pipe 17 is used for delivering lubricating oil to the first bearing 212, and the bearing oil spray pipe 17 is connected in parallel to the gear oil spray pipe 16.

Specifically, the bearing oil spray pipe 17 may be connected in parallel with the gear oil spray pipe 16 through a three-way valve. When the hydraulic pump 13 is in operation, the bearing oil spray pipe 17 can deliver lubricating oil to the outer surface or the inner surface of the first bearing 212, so as to complete the lubricating and cooling of the first bearing 212.

In one embodiment, referring to fig. 2, the bearing oil spray pipe 17 is communicated with an inner cavity of the engine gear shaft set 21, the engine main shaft 210 is provided with a leading-out hole 214 communicating the inner cavity with an external space, the leading-out hole 214 is located on a side of the first bearing 212 facing away from the first gear 211, and the lubricating oil is delivered to the first bearing 212 through the leading-out hole 214.

Specifically, the inside of the main engine shaft 210 is a hollow structure, and the extending direction of the inner cavity of the main engine shaft 210 may be the same as the extending direction of the main engine shaft 210. The engine main shaft 210 may further have an outlet hole 214 formed therein, and the outlet hole 214 may communicate the inner cavity with an external space. The lead-out hole 214 may be located near the first bearing 212 and at a side facing away from the first gear 211. When the engine gear shaft set 21 rotates, the lubricant in the inner cavity can be thrown out onto the first bearing 212 through the outlet hole 214 by the centrifugal force, so as to lubricate the first bearing 212.

In one embodiment, referring to fig. 2, the number of the outlet holes 214 may be multiple, and the plurality of outlet holes 214 are simultaneously used for discharging the lubricant to the first bearing 212.

In one embodiment, referring to fig. 2, the engine gear shaft set 21 further includes a second bearing 212B, the second bearing 212B is disposed at the other end of the main shaft of the engine, and the bearing oil spray pipe 17 is used for conveying lubricating oil to the second bearing 212B.

Specifically, the guide hole 214 may be formed near the second bearing 212B, and the position of the guide hole 214 may be located on a side of the second bearing 212B facing the first bearing 212, or located on a side facing away from the first bearing 212, which is not limited in particular. When the engine gear shaft group 21 rotates, the lubricant in the inner cavity can be thrown out to the second bearing 212B through the outlet hole 214 by centrifugal force, so as to lubricate the second bearing 212B.

In one embodiment, referring to fig. 2, the engine gear shaft set 21 further includes a main shaft oil guide plate 213, the main shaft oil guide plate 213 is located on a side of the second bearing 212B facing away from the first bearing 212, the bearing oil spray pipe 17 delivers the lubricating oil to the inner cavity of the main shaft 210 of the engine through the main shaft oil guide plate 213, and the main shaft oil guide plate 213 further delivers the lubricating oil to the second bearing 212B.

Specifically, a main shaft oil guide plate 213 is connected to one end of the engine main shaft 210. The main shaft oil guide plate 213 may have an opening, and the inner cavity of the engine main shaft 210 may be communicated with the outside through the opening. One end of the bearing oil spray pipe 17 may communicate with the opening of the main shaft oil guide plate 213, whereby the lubricating oil may be delivered to the inner cavity of the engine gear shaft group 21.

The main shaft oil guide plate 213 is arranged on the engine gear shaft group 21, and the tube cavity of the bearing oil injection tube 17 is communicated with the inner cavity of the engine main shaft 210 through the main shaft oil guide plate 213, so that lubricating oil can be conveyed to the inner cavity of the engine main shaft 210; the engine main shaft 210 is provided with a guide-out hole 214 communicating with the external space, so that the lubricating oil can be discharged to the first bearing 212 by utilizing the centrifugal force generated when the engine gear shaft group 21 rotates, thereby achieving the lubricating effect on the first bearing 212; in this case, by changing the structure of the engine gear shaft group 21, the flow direction of the lubricating oil is wider, so that the components on the engine gear shaft group 21 can be lubricated to a relative degree.

In one embodiment, referring to fig. 1 and fig. 3, the generator gear shaft set 22 further includes a generator rotating shaft (not shown) and a second gear 221 disposed on the generator rotating shaft, the gear oil spraying pipe 16 is communicated with the hydraulic pump 13, and an orifice of the gear oil spraying pipe 16 is disposed between the first gear 211 and the second gear 221.

Specifically, the second gear 221 may be integrated with the generator shaft, and the first gear 211 and the second gear 221 are engaged. One end of the oil jet gear 16 may be connected to the liquid outlet of the hydraulic pump 13, and the other end of the oil jet gear 16 may be located between the first gear 211 and the second gear 221, so that the oil jet gear 16 may simultaneously deliver the lubricating oil to the first gear 211 and the second gear 221. Also, the first gear 211 and the second gear 221 may be located above the oil sump 11, and the lubricating oil on the first gear 211 and the second gear 221 may flow back into the oil sump 11 by gravity and re-perform the next circulation of the lubricating and cooling.

In one embodiment, referring to fig. 3, the generator gear shaft set 22 includes a third bearing 222, the bearing oil spray pipe 17 is connected in parallel with the gear oil spray pipe 16, and the bearing oil spray pipe 17 delivers the lubricating oil to the third bearing 222.

Specifically, the bearing oil spout pipe 17 may be connected in parallel with the gear oil spout pipe 16 by a three-way valve, and the bearing oil spout pipe 17 may include a first pipe and a second pipe. When the hydraulic pump 13 is operated, the first pipe may deliver the lubricant to the outer surface or the inner surface of the first bearing 212, and the second pipe may deliver the lubricant to the outer surface or the inner surface of the third bearing 222, thereby performing the lubrication cooling of the third bearing 222.

In one embodiment, referring to fig. 4, when the lubricant is further delivered to the motor, the extended range vehicle further includes a motor oil spray pipe 18, the motor oil spray pipe 18 is connected in parallel with the gear oil spray pipe 16, and the motor oil spray pipe 18 delivers the lubricant to the outside of the motor.

Specifically, the motor may include an outer casing enclosing an outer cavity, an inner casing accommodated in the outer cavity and enclosing an inner cavity, and a motor body 31 accommodated in the inner cavity. The motor spray bar 18 may communicate with the outer chamber and lubricant may flow along the motor spray bar 18 to the outer chamber, thereby cooling the inner housing and the motor pump body. Furthermore, a notch can be formed in the bottom of the housing, and the notch can be communicated with the oil groove 11, so that the lubricating oil can flow back into the oil groove 11 along the notch when falling to the bottom of the housing, and the next circulation of lubricating and cooling is performed again.

In one embodiment, referring to fig. 3 and 4, the extended range vehicle further includes an oil cooler 15 and an oil inlet pipe 14, the oil inlet pipe 14 connects the oil cooler 15 and the hydraulic pump 13, and the oil cooler 15 is used for cooling the lubricant oil in the oil inlet pipe 14.

Specifically, the oil inlet pipe 14 may be connected to an outlet of the hydraulic pump 13, the lubricant pumped by the hydraulic pump 13 may be delivered to the oil cooler 15 through the oil inlet pipe 14, and the oil cooler 15 may be configured to cool the lubricant flowing through. Therefore, when the range extender works, the oil cooler 15 can continuously cool the lubricating oil flowing through; and under the pressure of the hydraulic pump 13 the cooling oil can be delivered to the engine, generator and motor in the above embodiments, lubricating the above machines and cooling them at the same time.

In one embodiment, referring to fig. 3 and 4, the extended range vehicle further includes a filter 12, the filter 12 is accommodated in the oil tank 11 and connected to a liquid inlet of the hydraulic pump 13, and the filter 12 is used for filtering the lubricating oil in the oil tank 11.

Specifically, the filter 12 is connected to the hydraulic pump 13 and is immersed in the lubricating oil together. Filter 12 connects before hydraulic pump 13's inlet, can filter the lubrication that hydraulic pump 13 was pumped, avoids the impurity in the lubricating oil to stay near the gear along hydraulic pump 13 to the influence increases journey ware work. Preferably, the filter 12 may be in contact with the bottom of the oil tank 11 when the liquid inlet of the hydraulic pump 13 is directed to the bottom of the oil tank 11.

When the range extender works, the generator gear shaft group 22 drives the pump impeller 131 and the hydraulic pump 13 to provide power, so that lubricating oil naturally deposited at the bottom of the oil tank 11 is sucked and pumped out. In this process, because the suction filter is installed before the liquid inlet of the hydraulic pump 13, when the hydraulic pump 13 absorbs oil, the lubricating oil will be filtered by the suction filter first. The suction filter can be provided with a magnet, a filter screen and other filter elements and can be used for filtering impurities such as scrap iron and the like in lubricating oil.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, are used for describing the orientation or positional relationship based on the drawings, and are only used for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims (10)

1. An extended range vehicle, comprising:

the oil groove is used for containing lubricating oil;

the hydraulic pump is accommodated in the oil groove and at least partially immersed in the lubricating oil during operation;

the engine drives the generator to work, the generator drives the motor to work, and the engine also drives the hydraulic pump to pump the lubricating oil to one or more of the engine, the generator and the motor.

2. The extended range vehicle of claim 1, wherein the engine comprises an engine gear shaft set, the generator comprises a generator gear shaft set, the hydraulic pump comprises a pump impeller, the generator gear shaft set is connected with the pump impeller and the engine gear shaft set respectively, and the engine gear shaft set transmits power to the pump impeller through the generator gear shaft set and drives the pump impeller to rotate.

3. The extended range vehicle of claim 2, wherein the engine gear shaft set comprises an engine main shaft and a first gear arranged on the engine main shaft, and the hydraulic pump is connected with a gear oil injection pipe for delivering the lubricating oil to the first gear.

4. The extended range vehicle of claim 3, wherein the engine gear shaft set further comprises a first bearing, the first bearing is disposed at one end of the engine main shaft, the hydraulic pump is connected to a bearing oil spray pipe, the bearing oil spray pipe is used for conveying the lubricating oil to the first bearing, and the bearing oil spray pipe is connected in parallel with the gear oil spray pipe.

5. The extended range vehicle of claim 4, wherein the bearing oil spray pipe is in communication with an inner cavity of the engine main shaft, the engine main shaft is provided with an outlet hole communicating the inner cavity with an external space, the outlet hole is located on a side of the first bearing opposite to the first gear, and the lubricating oil is delivered to the first bearing through the outlet hole.

6. The extended range vehicle of claim 5, wherein the engine gear shaft set further comprises a second bearing disposed at the other end of the engine main shaft, the bearing spray bar being configured to deliver the lubricating oil to the second bearing.

7. The extended range vehicle of claim 6, wherein the engine gear shaft set further comprises a main shaft oil guide plate located on a side of the second bearing facing away from the first bearing, the bearing oil spray pipe delivers the lubricating oil to an inner cavity of the engine main shaft through the main shaft oil guide plate, and the main shaft oil guide plate also delivers the lubricating oil to the second bearing.

8. The extended range vehicle of claim 3, wherein the generator gear set further comprises a generator rotating shaft and a second gear arranged on the generator rotating shaft, the gear oil spraying pipe is communicated with the hydraulic pump, and an orifice of the gear oil spraying pipe is arranged between the first gear and the second gear.

9. The range extending vehicle of claim 1, further comprising an oil cooler and an oil inlet pipe, wherein the oil inlet pipe is connected to the oil cooler and the hydraulic pump, and the oil cooler is configured to cool the lubricant oil in the oil inlet pipe.

10. The range-extended vehicle of claim 1, further comprising a filter housed in the oil sump and connected to an inlet of the hydraulic pump, the filter configured to filter the lubricant in the oil sump.

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