Duplex gear pump and power equipment

Abstract

The invention provides a duplex gear pump and power equipment. The duplex gear pump comprises a pump shell, the pump shell comprises a first pump chamber and a second pump chamber, the first pump chamber and the second pump chamber are in fluid isolation, the first pump chamber is provided with a first pump oil inlet and a first pump oil outlet, and the second pump chamber is provided with a second pump oil inlet and a second pump oil outlet; the driving shaft comprises a first driving shaft section positioned in the first pump chamber and a second driving shaft section positioned in the second pump chamber; the driven shaft and the driving shaft are arranged side by side at an interval, and the driven shaft comprises a first driven shaft section located in the first pump chamber and a second driven shaft section located in the second pump chamber; the first pump driving gear is relatively and fixedly mounted on the first driving shaft section in the circumferential direction of the driving shaft; the second pump driving gear is relatively and fixedly mounted on the second driving shaft section in the circumferential direction of the driving shaft; the first pump driven gear is mounted on the first driven shaft section and meshed with the first pump driving gear; and the second pump driven gear is mounted on the second driven shaft section and is meshed with the second pump driving gear.

Description

Technical Field

[0001] The present application relates to the technical field of power machinery, and in particular to a double gear pump and power equipment. Background Art

[0002] For power equipment that includes both an engine and a reducer, a lubrication cooling system needs to be set up to lubricate the engine and the reducer. Usually, in the lubrication cooling system, a separate oil pump and an engine oil pipeline are provided for the engine to provide lubricating oil to the engine, and a separate oil pump and a reducer oil pipeline are provided for the reducer to provide lubricating oil to the reducer. This traditional lubrication cooling system has many pipelines and a large number of lubrication pumps, occupies a large space, is inconvenient to arrange, and has a high cost.

[0003] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Summary of the invention

[0004] The purpose of the present application is to provide a double gear pump and power equipment, aiming to reduce the technical problems of a large number of lubrication pumps in the lubrication and cooling system of the power equipment, large occupied space, inconvenient layout and high cost.

[0005] The first aspect of the present application provides a double gear pump, comprising:

[0006] A pump housing including a first pump chamber and a second pump chamber fluidically isolated from each other, the first pump chamber having a first pump oil inlet and a first pump oil outlet, the second pump chamber having a second pump oil inlet and a second pump oil outlet;

[0007] A drive shaft, comprising a first drive shaft section located in the first pump chamber and a second drive shaft section located in the second pump chamber;

[0008] A driven shaft is arranged side by side and spaced apart from the driving shaft, comprising a first driven shaft section located in the first pump chamber and a second driven shaft section located in the second pump chamber;

[0009] a first pump driving gear relatively fixedly mounted on the first driving shaft section along the circumference of the driving shaft;

[0010] a second pump driving gear relatively fixedly mounted on the second driving shaft section along the circumference of the driving shaft;

[0011] a first pump driven gear mounted on the first driven shaft section and meshing with the first pump driving gear;

[0012] A second pump driven gear is mounted on the second driven shaft section and meshes with the second pump driving gear.

[0013] In some embodiments of the duplex gear pump,

[0014] The first pump chamber has a first pump oil inlet and a first pump oil outlet;

[0015] The second pump chamber has two second pump oil inlets and one second pump oil outlet.

[0016] In some embodiments of the duplex gear pump, the pump housing comprises:

[0017] a first shell portion;

[0018] a second shell portion; and

[0019] A partition is connected between the first shell portion and the second shell portion, the first shell portion and the partition form the first pump chamber, the second shell portion and the partition form the second pump chamber, the driving shaft and the driven shaft respectively pass through the partition and are rotatably sealed with the partition.

[0020] In some embodiments of the duplex gear pump,

[0021] The first pump drive gear is connected to the first drive shaft section via a first key; and / or

[0022] The second pump drive gear is connected to the second drive shaft section via a second key; and / or

[0023] The first pump driven gear is connected to the first driven shaft segment via a third key; and / or

[0024] The second pump driven gear is sleeved on the second driven shaft section and cooperates with the second driven shaft section in a relatively rotatable manner.

[0025] The second aspect of the present application provides a power device, including an engine, a reducer and a lubrication and cooling system, wherein the engine includes an engine oil pan and an engine lubrication component, the reducer includes a reducer oil pan and a reducer lubrication component, and the lubrication and cooling system includes:

[0026] The double gear pump described in the first aspect of the present application;

[0027] an engine oil pipeline, comprising an engine oil suction pipe and an engine oil supply pipe, wherein the engine oil suction pipe is connected between the engine oil pan and the first pump oil inlet of the duplex gear pump, and the engine oil supply pipe is connected between the first pump oil outlet of the duplex gear pump and the engine lubricating component; and

[0028] The reducer oil pipeline is fluidically isolated from the engine oil pipeline, and includes a reducer oil suction pipe and a reducer oil supply pipe. The reducer oil suction pipe is connected between the reducer oil pan and the second pump oil inlet of the duplex gear pump, and the reducer oil supply pipe is connected between the second pump oil outlet of the duplex gear pump and the reducer lubrication component.

[0029] In some embodiments of the power device,

[0030] The power equipment includes one engine and two reducers;

[0031] The first pump chamber of the duplex gear pump has one first pump oil inlet and one first pump oil outlet, and the second pump chamber has two second pump oil inlets and one second pump oil outlet;

[0032] The reducer oil pipeline includes two reducer oil suction pipes, and the two reducer oil suction pipes are respectively connected between the reducer oil pans of the two reducers and the two second pump oil inlets of the double gear pump;

[0033] The reducer oil supply pipe includes a reducer oil supply main pipe and two reducer oil supply branch pipes connected to the reducer oil supply main pipe. The reducer oil supply main pipe is connected to the second pump oil outlet of the duplex gear pump, and the two reducer oil supply branch pipes are respectively connected to the reducer lubrication parts of the two reducers.

[0034] In the power equipment of some embodiments, the lubrication and cooling system further comprises:

[0035] an engine oil flow regulating device, arranged on the engine oil pipeline; and / or

[0036] The speed reducer oil flow regulating device is arranged on the speed reducer oil pipeline.

[0037] In some embodiments of the power device,

[0038] The engine oil flow regulating device comprises at least one of an engine oil suction flow regulating unit and an engine oil supply flow regulating unit, wherein the engine oil suction flow regulating unit is arranged on the engine oil suction pipe and the engine oil supply flow regulating unit is arranged on the engine oil supply pipe; and / or

[0039] The reducer oil flow regulating device includes at least one of a reducer oil suction flow regulating part and a reducer oil supply flow regulating part. The reducer oil suction flow regulating part is arranged on the reducer oil suction pipe, and the reducer oil supply flow regulating part is arranged on the reducer oil supply pipe.

[0040] In the power equipment of some embodiments, the lubrication and cooling system further comprises:

[0041] An engine oil filter device is arranged on the engine oil pipeline; and / or

[0042] The speed reducer oil filter device is arranged on the speed reducer oil pipeline.

[0043] In the power equipment of some embodiments, the lubrication and cooling system further comprises:

[0044] an engine oil cooling device, arranged on the engine oil pipeline; and / or

[0045] The speed reducer oil cooling device is arranged on the speed reducer oil pipeline.

[0046] Based on the twin gear pump provided by the present application, two independent gear pumps are integrated. The two independent gear pumps share a pump housing, a drive shaft and a driven shaft, which reduces the number of lubrication pumps. The twin gear pumps can be driven by the same drive mechanism, which reduces the space occupied by the lubrication pumps. The layout is simple and helps to reduce costs. Due to the shared drive shaft and driven shaft, the structure of the twin gear pump is simpler, the parts are reduced, the processing is convenient, the volume can be further reduced, and the cost can be further reduced. The first pump chamber and the second pump chamber are fluidically isolated from each other, so that the two gear pumps can also absorb and transport different oils, which increases the flexibility of use of the twin gear pump.

[0047] The power equipment of the present application has the advantages of the double gear pump of the present application. Further, the lubricating oil can be provided to the engine and the reducer respectively through the two independent gear pumps of the double gear pump and the independent engine oil pipeline and reducer oil pipeline connected to the two gear pumps, thereby realizing independent supply of lubricating oil to the engine and the reducer.

[0048] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0050] Figure 1 This is a schematic diagram of the principle of the power equipment of an embodiment of the present application.

[0051] Figure 2 This is a schematic diagram of the three-dimensional structure of a double gear pump according to some embodiments of the present application.

[0052] Figure 3 for Figure 2 A schematic diagram of the exploded structure of the duplex gear pump of the illustrated embodiment.

[0053] Figure 4 for Figure 2 A schematic cross-sectional view of the double gear pump of the illustrated embodiment. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0056] In the description of the present application, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present application.

[0057] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the directional words is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0058] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0059] like Figures 1 to 4 As shown, an embodiment of the present application provides a double gear pump and a power device having the double gear pump.

[0060] like Figures 2 to 4 As shown, the duplex gear pump includes a pump housing, a drive shaft 40 , a driven shaft 50 , a first pump drive gear 41 , a second pump drive gear 42 , a first pump driven gear 51 , and a second pump driven gear 52 .

[0061] The pump housing includes a first pump chamber 60 and a second pump chamber 70 which are fluidically isolated from each other. The first pump chamber 60 has a first pump oil inlet 61 and a first pump oil outlet 62 , and the second pump chamber 70 has a second pump oil inlet 73 and a second pump oil outlet 73 .

[0062] The drive shaft 40 includes a first drive shaft section located in the first pump chamber 60 and a second drive shaft section located in the second pump chamber 70. The driven shaft 50 is arranged side by side with the drive shaft 40 and includes a first driven shaft section located in the first pump chamber 60 and a second driven shaft section located in the second pump chamber 70.

[0063] The first pump driving gear 41 is relatively fixedly mounted on the first driving shaft section along the circumference of the driving shaft 40. The second pump driving gear 42 is relatively fixedly mounted on the second driving shaft section along the circumference of the driving shaft 40. The first pump driven gear 51 is mounted on the first driven shaft section and meshes with the first pump driving gear 41. The second pump driven gear 52 is mounted on the second driven shaft section and meshes with the second pump driving gear 42.

[0064] The twin gear pump of the embodiment of the present application integrates two independent gear pumps. The two independent gear pumps share a pump housing, a drive shaft 40 and a driven shaft 50, which reduces the number of lubrication pumps. The twin gear pumps can be driven by the same drive mechanism, which reduces the space occupied by the lubrication pumps. The layout is simple and helps to reduce costs. Due to the shared drive shaft 40 and the driven shaft 50, the structure of the twin gear pump is simpler, the parts are reduced, the processing is convenient, the volume can be further reduced, and the cost can be further reduced. The first pump chamber 60 and the second pump chamber 70 are fluidically isolated from each other, so that the two gear pumps can also absorb and transport different oils, which increases the flexibility of use of the twin gear pump. The twin gear pump is suitable for providing lubricating oil or cooling oil for two different devices. For example, lubricating oil can be provided to the engine and the reducer at the same time.

[0065] like Figures 2 to 4As shown, in some embodiments of the duplex gear pump, the first pump chamber 60 has a first pump oil inlet 61 and a first pump oil outlet 62 ; the second pump chamber 70 has two second pump oil inlets 71 and 72 and a second pump oil outlet 73 .

[0066] The double gear pump of this embodiment is suitable for providing lubricating oil or cooling oil for two different equipments, wherein the quantity of one equipment can be two. For example, the double gear pump of this embodiment can provide lubricating oil for one engine and two speed reducers at the same time.

[0067] like Figures 2 to 4 As shown, in some embodiments of the duplex gear pump, the pump housing includes a first housing 10, a second housing 30 and a partition 20. The partition 20 is connected between the first housing 10 and the second housing 30. The first housing 10 and the partition 20 form a first pump chamber 60. The second housing 30 and the partition 20 form a second pump chamber 70. The drive shaft 40 and the driven shaft 50 respectively pass through the partition 20 and are rotatably sealed with the partition.

[0068] The pump casing includes a first casing portion 10, a second casing portion 30 and a partition plate 20. The two gear pumps share the partition plate 20, which is beneficial to simplifying the pump casing structure, further reducing the space occupied by the pump casing and the duplex gear pump, and facilitating the disassembly, assembly and maintenance of the duplex gear pump.

[0069] like Figure 3 and Figure 4 As shown, in some embodiments of the double gear pump, the first pump driving gear 41 is connected to the first driving shaft segment via a first key 411; and / or the second pump driving gear 42 is connected to the second driving shaft segment via a second key 412; and / or the first pump driven gear 51 is connected to the first driven shaft segment via a third key 511; and / or the second pump driven gear 52 is sleeved on the second driven shaft segment and is relatively rotatably matched with the second driven shaft segment.

[0070] The connection relationship between the above-mentioned driving gears, driven gears and the driving shaft 40 and the driven shaft 50 is conducive to the disassembly, assembly and maintenance of the double gear pump, wherein the second pump driven gear 52 is sleeved on the second driven shaft section and can be relatively rotatably matched with the second driven shaft section, which is conducive to reducing the mutual influence of the movement of the two gear pumps, thereby helping to reduce the noise of the double gear pump and increase the life of the double gear pump.

[0071] like Figure 1 As shown, the power equipment provided in the embodiment of the present application includes an engine 1, reducers 2, 3 and a lubrication and cooling system, the engine 1 includes an engine oil pan 1-1 and an engine lubricating component 1-2, and the reducer includes reducer oil pans 2-1, 3-1 and reducer lubricating components.

[0072] The lubrication and cooling system includes a double gear pump 5, an engine oil pipeline and a reducer oil pipeline. The double gear pump 5 is a double gear pump of the embodiment of the present application.

[0073] The engine oil pipeline includes an engine oil suction pipe and an engine oil supply pipe. The engine oil suction pipe is connected between the engine oil pan 1-1 and the first pump oil inlet 61 of the double gear pump 5. The engine oil supply pipe is connected between the first pump oil outlet 62 of the double gear pump 5 and the engine lubricating component 1-2.

[0074] The reducer oil pipeline is fluidically isolated from the engine oil pipeline, and includes a reducer oil suction pipe and a reducer oil supply pipe. The reducer oil suction pipe is connected between the reducer oil pan 2-1, 3-1 and the second pump oil inlet of the double gear pump 5. The reducer oil supply pipe is connected between the second pump oil outlet 73 of the double gear pump 5 and the reducer lubrication parts.

[0075] The power equipment of the embodiment of the present application has the advantages of the double gear pump of the present application. Further, the lubricating oil can be provided to the engine and the reducer respectively through the two independent gear pumps of the double gear pump 5 and the independent engine oil pipeline and reducer oil pipeline connected to the two gear pumps, thereby realizing independent supply of lubricating oil to the engine and the reducer.

[0076] like Figures 1 to 4 As shown, in some embodiments of the power equipment, the power equipment includes an engine 1 and two reducers 2 and 3. The first pump chamber 60 of the double gear pump 5 has a first pump oil inlet 61 and a first pump oil outlet 62, and the second pump chamber 70 has two second pump oil inlets 71 and 72 and a second pump oil outlet 73. The reducer oil pipeline includes two reducer oil suction pipes, and the two reducer oil suction pipes are respectively connected between the reducer oil pans 2-1 and 3-1 of the two reducers 2 and 3 and the two second pump oil inlets 71 and 72 of the double gear pump 5. The reducer oil supply pipe includes a reducer oil supply main pipe and two reducer oil supply branch pipes connected to the reducer oil supply main pipe, the reducer oil supply main pipe is connected to the second pump oil outlet 73 of the double gear pump 5, and the two reducer oil supply branch pipes are respectively connected to the reducer lubrication parts 2-2 and 3-2 of the two reducers 2 and 3.

[0077] The above arrangement is conducive to the duplex gear pump to provide lubricating oil to an engine and two reducers at the same time, and to isolate the lubricating oil of the engine from the two reducers.

[0078] like Figure 1 As shown, in some embodiments of the power equipment, the lubrication cooling system also includes an engine oil flow regulating device, which is arranged on the engine oil pipeline; and / or a reducer oil flow regulating device, which is arranged on the reducer oil pipeline.

[0079] The engine oil flow regulating device is provided to help adjust the amount of lubricating oil in the engine, thereby adapting to the lubrication needs of the engine. The reducer oil flow regulating device is provided to help adjust the amount of lubricating oil in the engine, thereby adapting to the lubrication needs of the reducer.

[0080] like Figure 1 As shown, in some embodiments of the power equipment, the engine oil flow regulating device includes at least one of an engine oil suction flow regulating part and an engine oil supply flow regulating part, the engine oil suction flow regulating part is arranged on the engine oil suction pipe, and the engine oil supply flow regulating part is arranged on the engine oil supply pipe; and / or the reducer oil flow regulating device includes at least one of a reducer oil suction flow regulating part and a reducer oil supply flow regulating part, the reducer oil suction flow regulating part is arranged on the reducer oil suction pipe, and the reducer oil supply flow regulating part is arranged on the reducer oil supply pipe.

[0081] The engine oil flow regulating device includes an engine oil suction flow regulating part, which can control the lubricating oil flow from the suction end of the first gear pump of the double gear pump, thereby facilitating the precise control of the engine lubricating oil flow; the engine oil flow regulating device includes an engine oil supply throttling, which can control the lubricating oil flow from the output end of the first gear pump of the double gear pump, thereby facilitating the precise control of the engine lubricating oil flow. The reducer oil flow regulating device includes a reducer oil suction flow regulating part, which can control the lubricating oil flow from the suction end of the second gear pump of the double gear pump, thereby facilitating the precise control of the reducer lubricating oil flow; the reducer oil flow regulating device includes a reducer oil supply flow regulating part, which can control the lubricating oil flow from the output end of the second gear pump of the double gear pump, thereby facilitating the precise control of the reducer lubricating oil flow.

[0082] like Figure 1 As shown, in some embodiments of the power equipment, the lubrication and cooling system further includes: an engine oil filter device, which is arranged on the engine oil pipeline; and / or a reducer oil filter device, which is arranged on the reducer oil pipeline.

[0083] The engine oil filter device is provided to clean the lubricating oil in the engine, thereby improving the working stability and service life of the double gear pump, the engine oil pipeline and the fluid components thereon, such as the engine oil regulating device, and the engine lubricating parts. The reducer oil filter device is provided to clean the lubricating oil in the reducer, thereby improving the working stability and service life of the double gear pump, the reducer oil pipeline and the fluid components thereon, such as the reducer oil regulating device, and the reducer lubricating parts.

[0084] like Figure 1 As shown, in some embodiments of the power equipment, the lubrication cooling system also includes: an engine oil cooling device, which is arranged on the engine oil pipeline; and / or a reduction gear oil cooling device, which is arranged on the reduction gear oil pipeline.

[0085] The engine oil cooling device is provided to cool the lubricating oil in the engine, thereby improving the working stability and service life of the double gear pump, the engine oil pipeline and the fluid components thereon, such as the engine oil regulating device, and the engine lubricating parts. The reducer oil cooling device is provided to cool the lubricating oil in the reducer, thereby improving the working stability and service life of the double gear pump, the reducer oil pipeline and the fluid components thereon, such as the reducer oil regulating device, and the reducer lubricating parts.

[0086] The following combination Figures 1 to 4 The power equipment and the double gear pump of the embodiment of the present application are further explained.

[0087] like Figure 1 As shown, the power equipment includes an engine 1, a reducer 2, a reducer 3 and a lubrication and cooling system. The lubrication and cooling system includes an oil pump motor 4, a double gear pump 5, an engine oil pipeline, a reducer oil pipeline, an engine oil flow regulating device, a reducer oil flow regulating device, an engine oil filter device, a reducer oil filter device and a reducer oil cooling device.

[0088] The engine 1 includes an engine oil pan 1-1 and an engine lubricating component 1-2. The reducer 2 includes a reducer oil pan 2-1 and a reducer lubricating component 2-2. The reducer 3 includes a reducer oil pan 3-1 and a reducer lubricating component 3-2.

[0089] like Figures 2 to 4 As shown, the double gear pump 5 includes a pump housing, a drive shaft 40 , a driven shaft 50 , a first pump driving gear 41 , a second pump driving gear 42 , a first pump driven gear 51 and a second pump driven gear 52 .

[0090] The drive shaft 40 is connected to the output shaft of the oil pump motor 4, so that the oil pump motor 4 can drive the drive shaft 40 to rotate. The drive shaft 40 and the output shaft of the oil pump motor 4 can be connected by a spline connection, an interference connection, or a coupling connection.

[0091] like Figures 2 to 4 As shown, the pump housing includes a first housing 10, a partition 20 and a second housing 30. The first housing 10, the partition 20 and the second housing 30 are assembled together by long screws. A first pump chamber 60 is formed between the first housing 10 and the partition 20. A second pump chamber 70 is formed between the partition 20 and the second housing 30. O-rings are respectively installed on both sides of the partition 20 and between the first housing 10 and the second housing to prevent oil leakage in the first pump chamber 60 and the second pump chamber 70.

[0092] The driving shaft 40 and the driven shaft 50 are parallel and spaced apart from each other, respectively pass through the parallel and spaced through holes on the partition 20, and respectively form a rotatable sealing fit with the hole walls of the through holes of the partition 20 to prevent the oil in the first pump chamber 60 and the second pump chamber 70 from communicating with each other.

[0093] The drive shaft 40 includes a first drive shaft section located in the first pump chamber 60 and a second drive shaft section located in the second pump chamber 70. A first drive gear 41 and a second drive gear 42 are mounted on the first drive shaft section and the second drive shaft section, respectively. The driven shaft 50 includes a first driven shaft section located in the first pump chamber 60 and a second driven shaft section located in the second pump chamber 70. A first driven gear 51 and a second driven gear 52 are mounted on the first driven shaft section and the second driven shaft section, respectively. The first drive gear 41 and the first driven gear 51 are located in the first pump chamber 60, and the first drive gear 41 and the first driven gear 51 are meshed with each other to form a first gear pump. The second drive gear 42 and the second driven gear 52 are located in the second pump chamber 70, and the second drive gear 42 and the second driven gear 52 are meshed with each other to form a second gear pump.

[0094] The driving shaft 40 and the driven shaft 50 are both axially limited by retaining rings to prevent axial movement of the duplex gear pump.

[0095] like Figure 3 and Figure 4 As shown, the first driving gear 41 is connected to the first driving shaft section of the driving shaft 40 through the first key 411. The second driving gear 42 is connected to the second driving shaft section of the driving shaft 40 through the second key 421. The first driven gear 51 is connected to the first driven shaft section of the driven shaft 50 through the third key 511. The second driven gear 52 is freely mounted on the driven shaft 50 and rotatably cooperates with the second driven shaft section.

[0096] like Figure 3 and Figure 4 As shown, the first shell part 10 includes a shell body, a main cover plate 11 and an auxiliary cover plate 12. The first pump chamber 60 is mainly surrounded by the shell body and the partition plate 20. The end plate of the shell body away from the partition plate 20 is provided with openings corresponding to the driving shaft 40 and the driven shaft 50 respectively. The main cover plate 11 covers the opening corresponding to the driving shaft 40 and leaves a middle hole, and the middle hole is used to pass the driving shaft 40. The auxiliary cover plate 12 covers the opening corresponding to the driven shaft 50. The main cover plate 11 and the auxiliary cover plate 12 are installed on the shell body by screws. O-rings are respectively installed between the main cover plate 11 and the auxiliary cover plate 12 on the side facing the shell body and the shell body to prevent oil leakage at the driving shaft 40 and the driven shaft 50.

[0097] like Figures 2 to 4As shown, the first pump chamber 60 has a first pump oil inlet 61 and a first pump oil outlet 62. The second pump chamber 70 has a second pump oil inlet 71, a second pump oil inlet 72 and a second pump oil outlet 73. The first pump oil inlet 61 and the first pump oil outlet 62 are provided on the first shell 10. The inlet 711 of the second pump oil inlet 71 is provided on the first shell 10, and communicates with the second pump oil inlet 71 through a through hole 712 on the partition 20. O-rings are installed on both sides of the through hole 712 to prevent leakage when the oil flows through the hole 712. The second pump oil inlet 72 and the second pump oil outlet 73 are provided on the second shell 30.

[0098] The engine oil pipeline includes an engine oil suction pipe and an engine oil supply pipe. The engine oil suction pipe is connected between the engine oil pan 1-1 and the first pump oil inlet 61 of the double gear pump 5. The engine oil supply pipe is connected between the first pump oil outlet 62 of the double gear pump 5 and the engine lubricating component 1-2.

[0099] The reducer oil pipeline is fluidically isolated from the engine oil pipeline, and includes two reducer oil suction pipes and a reducer oil supply pipe. The reducer oil supply pipe includes a reducer oil supply main pipe and two reducer oil supply branch pipes connected to the reducer oil supply main pipe. The reducer oil supply main pipe is connected to the second pump oil outlet 73 of the double gear pump 5, and the two reducer oil supply branch pipes are connected to the reducer lubricating parts 2-2 and 3-2 of the two reducers 2 and 3 respectively.

[0100] The engine oil flow regulating device includes a first adjustable throttle 7-1 as an engine oil suction flow regulating part. The speed reducer oil flow regulating device includes a second adjustable throttle 7-2 and a third adjustable throttle 7-3 as speed reducer oil suction flow regulating parts and a fourth adjustable throttle 7-4 and a fifth adjustable throttle 7-5 as speed reducer oil supply flow regulating parts. The engine oil filtering device includes a first filter 8-1. The speed reducer oil filtering device includes a second filter 8-2 and a third filter 8-3. The speed reducer oil cooling device includes a radiator 6.

[0101] The first adjustable flow regulator 7 - 1 and the first filter 8 - 1 are installed on the oil suction pipe of the engine.

[0102] The second adjustable throttle 7-2 and the second filter 8-2 are installed on the reducer oil suction pipe connected to the second pump oil inlet 71. The third adjustable throttle 7-3 and the third filter 8-3 are installed on the reducer oil suction pipe connected to the second pump oil inlet 72. The fourth adjustable throttle 7-4 and the fifth adjustable throttle 7-5 are installed on two reducer oil supply branches respectively. The radiator 6 is installed on the reducer oil supply main pipe.

[0103] When the power equipment is working, the oil pump motor 4 runs, driving the drive shaft 40 to rotate, thereby causing the double gear pump 5 to operate.

[0104] The first pump chamber 60 of the duplex gear pump 5 draws engine oil as lubricating oil from the engine oil pan 1-1 through the engine oil suction pipe and the first adjustable flow meter 7-1 and the first filter 8-1 on the engine oil suction pipe and the first pump oil inlet 61, and pumps the engine oil out from the first pump oil outlet 62 and transports it to the engine lubricating component 1-2 through the engine oil supply pipe for cooling and lubrication, and finally the engine oil flows back to the engine oil pan 1-1, forming an engine cooling and lubrication circulation oil circuit.

[0105] The second pump chamber 70 of the double gear pump 5 draws the gear oil as lubricating oil from the reducer oil pan 2-1 through a reducer oil suction pipe and the adjustable throttle 7-2 on the reducer oil suction pipe, the filter 8-2 and the second pump oil inlet 71, and draws the gear oil as lubricating oil from the reducer oil pan 3-1 through another reducer oil suction pipe and the adjustable throttle 7-3 on the reducer oil suction pipe, the filter 8-3 and the second pump oil inlet 72, and discharges the gear oil from the second pump oil outlet 73. It is pumped out to the reducer oil supply main pipe and cooled by the radiator 6 on the reducer oil supply main pipe. The cooled gear oil is divided into two paths and enters the two reducer oil supply branches. One path flows to the reducer lubrication component 2-2 through the adjustable throttle 7-4 for cooling and lubrication, and the other path flows to the reducer lubrication component 3-2 through the adjustable throttle 7-5 for cooling and lubrication. Finally, the two paths of gear oil flow back to the reducer oil pan 2-1 and the reducer oil pan 3-1 respectively, forming two reducer cooling and lubrication circulation oil circuits.

[0106] In the power equipment, the twin gear pump 5 can respectively draw oil from three cavities, namely the engine oil pan 1-1, the reducer oil pan 2-1 and the reducer oil pan 3-1, and cool and lubricate the three devices of the engine 1, the reducer 2 and the reducer 3 at the same time. The engine cooling and lubrication circulation oil circuit and the two reducer cooling and lubrication circulation oil circuits are independent of each other, and the first pump chamber 60 and the second pump chamber 70 are not connected to each other. The first gear pump and the second gear pump can draw different oil products, so that different oil products circulate in the engine cooling and lubrication circulation oil circuit and the two reducer cooling and lubrication circulation oil circuits, thereby simplifying the layout of the lubrication and cooling system.

[0107] The first adjustable throttle 7-1, the second adjustable throttle 7-2 and the third adjustable throttle 7-3 are arranged in the three oil suction pipes of the engine oil suction pipe and the two reducer oil suction pipes of the lubrication and cooling system of the power equipment, respectively, and the lubricating oil flow of the three oil suction pipes can be adjusted respectively, so that the same type of double gear pump can be used to match different types of vehicles or different parts for lubrication, which is conducive to improving the versatility of the double gear pump and saving design and manufacturing costs. The fourth adjustable throttle 7-4 and the fifth adjustable throttle 7-5 are arranged in the two reducer oil supply pipes, respectively, and the lubricating oil flow of the two reducers can be adjusted respectively, so as to facilitate the application of the double gear pump in the simultaneous lubrication of reducers of different specifications.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution requested for protection in this application.

Claims

1. A double gear pump, characterized in that: include: A pump housing, comprising a first pump chamber (60) and a second pump chamber (70) which are fluidically isolated from each other, the first pump chamber (60) having a first pump oil inlet (61) and a first pump oil outlet (62), and the second pump chamber (70) having a second pump oil inlet (71, 72) and a second pump oil outlet (73); A drive shaft (40) comprising a first drive shaft section located in the first pump chamber (60) and a second drive shaft section located in the second pump chamber (70); A driven shaft (50) is arranged side by side with the driving shaft (40) and spaced apart from each other, and comprises a first driven shaft section located in the first pump chamber (60) and a second driven shaft section located in the second pump chamber (70); A first pump driving gear (41) is relatively fixedly mounted on the first driving shaft section along the circumference of the driving shaft (40); a second pump driving gear (42) relatively fixedly mounted on the second driving shaft section along the circumference of the driving shaft (40); a first pump driven gear (51), mounted on the first driven shaft section and meshing with the first pump driving gear (41); A second pump driven gear (52) is mounted on the second driven shaft section and meshes with the second pump driving gear (42).

2. The double gear pump according to claim 1, characterized in that: The first pump chamber (60) has a first pump oil inlet (61) and a first pump oil outlet (62); The second pump chamber (70) has two second pump oil inlets (71, 72) and one second pump oil outlet (73).

3. The double gear pump according to claim 1, characterized in that: The pump housing comprises: A first shell portion (10); A second shell portion (30); and A partition (20) is connected between the first shell portion (10) and the second shell portion (30); the first shell portion (10) and the partition (20) form the first pump chamber (60); the second shell portion (30) and the partition (20) form the second pump chamber (70); the drive shaft (40) and the driven shaft (50) respectively pass through the partition (20) and are rotatably sealed with the partition.

4. The double gear pump according to any one of claims 1 to 3, characterized in that: The first pump drive gear (41) is connected to the first drive shaft section via a first key (411); and / or The second pump drive gear (42) is connected to the second drive shaft section via a second key (412); and / or The first pump driven gear (51) is connected to the first driven shaft section via a third key (511); and / or The second pump driven gear (52) is sleeved on the second driven shaft section and cooperates with the second driven shaft section to be relatively rotatable.

5. A power device, comprising an engine (1), a reducer (2, 3) and a lubrication and cooling system, wherein the engine (1) comprises an engine oil pan (1-1) and an engine lubricating component (1-2), and the reducer (2, 3) comprises a reducer oil pan (2-1, 3-1) and a reducer lubricating component (2-2, 3-2), characterized in that: The lubrication and cooling system comprises: The double gear pump (5) according to any one of claims 1 to 4; an engine oil pipeline, comprising an engine oil suction pipe and an engine oil supply pipe, the engine oil suction pipe being connected between the engine oil pan (1-1) and the first pump oil inlet (61) of the duplex gear pump (5), and the engine oil supply pipe being connected between the first pump oil outlet (62) of the duplex gear pump (5) and the engine lubricating component (1-2); and The reducer oil pipeline is fluidically isolated from the engine oil pipeline and comprises a reducer oil suction pipe and a reducer oil supply pipe. The reducer oil suction pipe is connected between the reducer oil pan (2-1, 3-1) and the second pump oil inlet (71, 72) of the duplex gear pump (5), and the reducer oil supply pipe is connected between the second pump oil outlet (73) of the duplex gear pump (5) and the reducer lubricating component (2-2, 3-2).

6. The power device according to claim 5, characterized in that: The power equipment comprises an engine (1) and two reducers (2, 3); The first pump chamber (60) of the double gear pump (5) has a first pump oil inlet (61) and a first pump oil outlet (62), and the second pump chamber (70) has two second pump oil inlets (71, 72) and a second pump oil outlet (73); The reducer oil pipeline comprises two reducer oil suction pipes, and the two reducer oil suction pipes are respectively connected between the reducer oil pans (2-1, 3-1) of the two reducers (2, 3) and the two second pump oil inlets (71, 72) of the double gear pump (5); The reducer oil supply pipe comprises a reducer oil supply main pipe and two reducer oil supply branch pipes connected to the reducer oil supply main pipe, the reducer oil supply main pipe is connected to the second pump oil outlet (73) of the duplex gear pump (5), and the two reducer oil supply branch pipes are respectively connected to the reducer lubricating components (2-2, 3-2) of the two reducers (2, 3).

7. The power equipment according to claim 5, characterized in that: The lubrication and cooling system also includes: An engine oil flow regulating device is arranged on the engine oil pipeline; and / or The speed reducer oil flow regulating device is arranged on the speed reducer oil pipeline.

8. The power device according to claim 7, characterized in that: The engine oil flow regulating device comprises at least one of an engine oil suction flow regulating unit and an engine oil supply flow regulating unit, wherein the engine oil suction flow regulating unit is arranged on the engine oil suction pipe and the engine oil supply flow regulating unit is arranged on the engine oil supply pipe; and / or The reducer oil flow regulating device includes at least one of a reducer oil suction flow regulating part and a reducer oil supply flow regulating part. The reducer oil suction flow regulating part is arranged on the reducer oil suction pipe, and the reducer oil supply flow regulating part is arranged on the reducer oil supply pipe.

9. The power equipment according to any one of claims 5 to 8, characterized in that: The lubrication and cooling system also includes: An engine oil filter device is arranged on the engine oil pipeline; and / or The speed reducer oil filter device is arranged on the speed reducer oil pipeline.

10. The power equipment according to any one of claims 5 to 8, characterized in that: The lubrication and cooling system also includes: an engine oil cooling device, arranged on the engine oil pipeline; and / or The speed reducer oil cooling device is arranged on the speed reducer oil pipeline.

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