An engine rear end power take-off device and an engine

Abstract

The utility model provides a kind of engine rear end power output device and engine, including gear box, gear box cover, gear assembly, gear assembly includes crankshaft drive gear, first idle gear, second idle gear, first hydraulic pump gear, second hydraulic pump gear, third idle gear, fourth idle gear, air pump gear, gear pump gear, first idle gear is engaged in the upper side of crankshaft drive gear, second idle gear is engaged in the upper side of crankshaft drive gear, first hydraulic pump gear is placed in first idle gear oblique upper side, second hydraulic pump gear is placed in second idle gear oblique upper side, third idle gear is coaxial with first idle gear and relative first idle gear close gear box, fourth idle gear is coaxial with second idle gear and relative second idle gear close gear box.The scheme of the utility model satisfies the hydraulic demand of whole car, realizes space, structural optimization design, guarantees different transmission ratio demand, improves structural compactness, and guarantees the reliability of each component operation.

Description

Technical Field

[0001] This utility model relates to the field of power machinery, and in particular to a power output device at the rear end of an engine and an engine. Background Technology

[0002] In existing technologies, with the development of vehicle technology, large agricultural vehicles are gradually moving towards full hydraulic drive, using hydraulics as the primary power transmission method. This places higher demands on the engine. Due to the complex structure and numerous functions of agricultural vehicles, the space within the vehicle is limited, and different vehicles have diverse hydraulic requirements. Therefore, designing multiple hydraulic output interfaces is crucial. How to enable the engine to accommodate multiple hydraulic pumps within a limited space, meet transmission ratio requirements, achieve a reasonable layout, and ensure the reliable operation of each component is one of the current problems that needs to be solved.

[0003] Therefore, it is necessary to provide a power output device and engine at the rear end of the engine to overcome the defects mentioned above. Utility Model Content

[0004] The purpose of this utility model is to provide a power output device for the rear end of an engine and an engine. By designing the power output device for the rear end, the space and structure are optimized while meeting the hydraulic requirements of the whole vehicle. This ensures the requirements of different transmission ratios, improves the compactness of the structure, and also ensures the reliability of the operation of each component.

[0005] According to one aspect of this utility model, an engine rear-end power output device is provided, including a gearbox, a gearbox cover, and a gear assembly. The gearbox cover is connected to the gearbox to form a receiving space, and the gear assembly is placed in the receiving space. The gear assembly includes a crankshaft drive gear, a first idler gear, a second idler gear, a first hydraulic pump gear, a second hydraulic pump gear, a third idler gear, a fourth idler gear, an air pump gear, and a gear pump gear. The crankshaft drive gear provides power to the gear assembly. The first idler gear meshes with the upper side of the crankshaft drive gear, and the second idler gear meshes with the upper other side of the crankshaft drive gear. The first hydraulic pump gear is positioned obliquely above the first idler gear, relatively away from the second idler gear. The first hydraulic pump gear meshes with the first idler gear to output power to the first idler gear. A hydraulic pump is configured with a second hydraulic pump gear positioned obliquely above and away from the first idler gear, meshing with the second idler gear to output power to the second hydraulic pump. A third idler gear is coaxial with the first idler gear and close to the gearbox relative to the first idler gear, rotating synchronously with the first idler gear. A fourth idler gear is coaxial with the second idler gear and close to the gearbox relative to the second idler gear, rotating synchronously with the second idler gear. An air pump gear is positioned obliquely below and away from the third idler gear, meshing with the third idler gear to output power to the air pump. A gear pump gear is positioned obliquely below and away from the fourth idler gear, meshing with the fourth idler gear to output power to the gear pump.

[0006] The above solution can meet the hydraulic requirements of the whole vehicle while optimizing the space and structure design, ensuring the requirements of different transmission ratios, improving the compactness of the structure, and ensuring the reliability of the operation of each component.

[0007] Preferably, the third idler gear includes an idler gear meshing portion and a hub portion extending along the end face of the idler gear meshing portion toward the side away from the gearbox, the hub portion being placed in the inner ring of the first idler gear and fixedly connected to the first idler gear; the fourth idler gear has the same structure as the third idler gear.

[0008] Preferably, the engine rear power output device further includes a first idler shaft passing through the third idler gear, a first bearing placed between the third idler gear and the first idler shaft, the first idler shaft being fixedly connected to the gearbox, the inner ring of the first bearing being fixed to the first idler shaft, and the outer ring of the first bearing being fixed to the hub.

[0009] Preferably, the engine rear power output device further includes a second bearing located between the first hydraulic pump gear and the gearbox cover, and a third bearing located between the first hydraulic pump gear and the gearbox.

[0010] Preferably, the first hydraulic pump gear includes a hydraulic pump gear meshing portion, a first extension portion extending along the hydraulic pump gear meshing portion toward the gearbox cover side, and a second extension portion extending along the hydraulic pump gear meshing portion toward the gearbox side. A second bearing is sleeved on the outer ring of the first extension portion, and a third bearing is sleeved on the outer ring of the second extension portion.

[0011] Preferably, the engine rear power output device further includes a fourth bearing located on the inner ring of the fourth idler gear, a fifth bearing located between the second hydraulic pump gear and the gearbox cover, and a sixth bearing located between the second hydraulic pump gear and the gearbox.

[0012] Preferably, the engine rear power output device further includes a second idler shaft passing through the fourth idler gear, the second idler shaft being fixedly connected to the gearbox, and the fourth bearing being placed between the fourth idler gear and the second idler shaft.

[0013] Preferably, the engine's rear power take-off unit also includes a lubrication channel for supplying lubricating oil to the rear power take-off unit. This design allows lubricating oil to be delivered to various bearings, gears, and the air pump, helping to ensure the reliable operation of all components.

[0014] Preferably, the lubricating oil passage includes a first oil passage, a second oil passage, an oil passage nozzle, a third oil passage, a fourth oil passage, and a fifth oil passage. The first oil passage is located inside the side wall of the gearbox, and its outlet faces the position of the first idler gear to provide lubricating oil. The second oil passage is located inside the side wall of the gearbox and communicates with the first oil passage. Its outlet faces the position of the first hydraulic pump to provide lubricating oil. The oil passage nozzle is located in the second oil passage and corresponds to the position of the first hydraulic pump gear. The opening of the oil passage nozzle faces the receiving space. The third oil passage is located in the first hydraulic pump gear and is obliquely inserted through the first hydraulic pump gear. The fourth oil passage is located inside the side wall of the gearbox, and its outlet faces the position of the second idler gear to provide lubricating oil. The fifth oil passage communicates with the fourth oil passage, and its outlet faces the position of the second hydraulic pump to provide lubricating oil. Oil is drawn from the engine block oil passages and connected to the inlets of the internal oil passages on the left and right sides of the gearbox via external oil pipes. These inlets are the first and fourth oil passages. The oil is then delivered to the bearings, gears, and air pumps through the internal first to sixth oil passages, ensuring the reliable operation of all components.

[0015] Preferably, the third oil passage includes a first port and a second port. The first port is located on the outer ring of the first extension and close to the engagement portion of the hydraulic pump gear. The second port is located on the inner ring of the first hydraulic pump gear and close to the second extension relative to the first port. Further, the second port is located on the inner ring of the first hydraulic pump gear and corresponds to the engagement portion of the hydraulic pump gear. This design helps to achieve better lubrication of the first hydraulic pump gear, the second bearing, and the third bearing.

[0016] Preferably, the lubrication passage further includes a sixth oil passage arranged radially along the idler gear shaft for lubricating the first bearing.

[0017] According to another aspect of the present invention, an engine is provided, comprising a cylinder block, an air pump, a first hydraulic pump, a second hydraulic pump, a gear pump, and a rear-end power output device of the above-described scheme.

[0018] This utility model provides an engine rear-end power output device and an engine. By designing the rear-end power output device, the space and structure are optimized while meeting the hydraulic requirements of the whole vehicle, ensuring the requirements of different transmission speed ratios, improving the compactness of the structure, and also ensuring the reliability of the operation of each component. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] Figure 1 A three-dimensional schematic diagram of the engine's rear power output device.

[0021] Figure 2 A schematic diagram of a gear assembly from one perspective;

[0022] Figure 3 A schematic diagram of the gear assembly from another perspective;

[0023] Figure 4 for Figure 3 Sectional view at position AA;

[0024] Figure 5 for Figure 3 Sectional view of the BB position;

[0025] Figure 6 Top view of the engine's rear power take-off unit;

[0026] Figure 7 for Figure 6 Sectional view at the CC position;

[0027] Figure 8 This is a schematic diagram of an engine.

[0028] Explanation of icon numbers:

[0029] 1. Gearbox; 2. Gearbox cover; 3. Gear assembly; 4. Second idler gear shaft; 5. First idler gear shaft; 6. Lubrication oil passage; 7. Air pump; 8. First hydraulic pump; 9. Second hydraulic pump; 10. Gear pump; 11. Cylinder block; 100. Engine; 301. Second hydraulic pump gear; 302. Gear pump gear; 303. Second idler gear; 304. Fourth idler gear; 305. Crankshaft drive gear; 306. First hydraulic pump gear; 307. First idler gear; 308. Third idler gear; 309. Air pump gear; 604. First oil passage; 602, Sixth oil passage; 603, Second oil passage; 607, Oil passage nozzle; 601, Third oil passage; 606, Fourth oil passage; 605, Fifth oil passage; 3061, Second extension; 3062, Hydraulic pump gear meshing part; 3063, First extension; 3081, Idler gear meshing part; 3082, Hub part; 6011, First port; 6012, Second port; S1, Sixth bearing; S2, Third bearing; S3, Fourth bearing; S4, First bearing; S5, Second bearing; S6, Fifth bearing. Detailed Implementation

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0032] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0033] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0036] See Figures 1 to 8As shown, this embodiment provides a power output device for the rear end of an engine 100, including a gearbox 1, a gearbox cover 2, and a gear assembly 3. The gearbox cover 2 is connected to the gearbox 1 to form a receiving space, and the gear assembly 3 is placed in the receiving space. The gear assembly 3 includes a crankshaft drive gear 305, a first idler gear 307, a second idler gear 303, a first hydraulic pump gear 306, a second hydraulic pump gear 301, a third idler gear 308, a fourth idler gear 304, an air pump gear 309, a gear pump gear 302, and a crankshaft drive gear 305. 5 is used to provide power to gear assembly 3. A first idler gear 307 meshes with the upper side of crankshaft drive gear 305, and a second idler gear 303 meshes with the upper other side of crankshaft drive gear 305. A first hydraulic pump gear 306 is positioned obliquely above the first idler gear 307, relatively away from the second idler gear 303. The first hydraulic pump gear 306 meshes with the first idler gear 307 to output power to the first hydraulic pump 8. A second hydraulic pump gear 301 is positioned obliquely above the second idler gear 303, relatively away from the first idler gear 307. The second hydraulic pump gear 301 meshes with the second idler gear 303 to output power to the second hydraulic pump 9. The third idler gear 308 is coaxial with the first idler gear 307 and is closer to the gearbox 1 relative to the first idler gear 307. The third idler gear 308 rotates synchronously with the first idler gear 307. The fourth idler gear 304 is coaxial with the second idler gear 303 and is closer to the gearbox 1 relative to the second idler gear 303. The fourth idler gear 304 rotates synchronously with the second idler gear 303. The air pump gear 309 is positioned relative to the third idler gear 308 and away from the crankshaft. Below the drive gear 305, the air pump gear 309 meshes with the third idler gear 308 to output power to the air pump 7. The gear pump gear 302 is located below the fourth idler gear 304, which is relatively far away from the crankshaft drive gear 305. The gear pump gear 302 meshes with the fourth idler gear 304 to output power to the gear pump 10. This design can meet the hydraulic requirements of the whole vehicle while optimizing the space and structure, ensuring the requirements of different transmission ratios, improving the compactness of the structure, and ensuring the reliability of the operation of each component.

[0037] See Figure 2 and Figure 3 As shown, the power output device at the rear end of the engine 100 also includes a second bearing S5 placed between the first hydraulic pump gear 306 and the gearbox cover 2, a third bearing S2 placed between the first hydraulic pump gear 306 and the gearbox 1, a fourth bearing S3 placed on the inner ring of the fourth idler gear 304, a fifth bearing S6 placed between the second hydraulic pump gear 301 and the gearbox cover 2, and a sixth bearing S1 placed between the second hydraulic pump gear 301 and the gearbox 1.

[0038] The power output device at the rear end of the engine 100 also includes a second idler shaft 4 passing through the fourth idler gear 304. The second idler shaft 4 is fixedly connected to the gearbox 1, and the fourth bearing S3 is placed between the fourth idler gear 304 and the second idler shaft 4.

[0039] See Figure 4 As shown, the third idler gear 308 includes an idler gear meshing portion 3081 and a hub portion 3082 extending along the end face of the idler gear meshing portion 3081 toward the side away from the gearbox 1. The hub portion 3082 is placed in the inner ring of the first idler gear 307 and is fixedly connected to the first idler gear 307. The fourth idler gear 304 has the same structure as the third idler gear 308.

[0040] The power output device at the rear end of the engine 100 also includes a first idler shaft 5 passing through the third idler gear 308 and a first bearing S4 placed between the third idler gear 308 and the first idler shaft 5. The first idler shaft 5 is fixedly connected to the gearbox 1. The inner ring of the first bearing S4 is fixed to the first idler shaft 5, and the outer ring of the first bearing S4 is fixed to the hub portion 3082.

[0041] See Figure 5 The first hydraulic pump gear 306 includes a hydraulic pump gear meshing part 3062, a first extension part 3063 extending along the hydraulic pump gear meshing part toward the gearbox cover 2 side, and a second extension part 3061 extending along the hydraulic pump gear meshing part toward the gearbox 1 side. The second bearing S5 is sleeved on the outer ring of the first extension part 3063, and the third bearing S2 is sleeved on the outer ring of the second extension part 3061.

[0042] See Figures 4 to 7 As shown, the engine 100 rear power output device also includes a lubrication channel 6 for supplying lubricating oil to the rear power output device, and delivers lubricating oil to each bearing, each gear and the air pump 7 to ensure the reliable operation of each component.

[0043] The lubrication passage 6 includes a first oil passage 604, a second oil passage 603, an oil passage nozzle 607, a third oil passage 601, a fourth oil passage 606, and a fifth oil passage 605. The first oil passage 604 is located inside the side wall of the gearbox 1, and its outlet faces the position of the first idler gear 307 to supply lubricating oil. The second oil passage 603 is located inside the side wall of the gearbox 1 and communicates with the first oil passage 604. Its outlet faces the position of the first hydraulic pump 8 to supply lubricating oil. The oil passage nozzle 607 is located in the second oil passage 603 and corresponds to the position of the first hydraulic pump gear 306. The opening of the oil passage nozzle 607 faces the receiving space. The third oil passage 601 is located in the first hydraulic pump gear 306 and is obliquely inserted through the first idler gear 305. The hydraulic pump gear 306 and the fourth oil passage 606 are located inside the side wall of the gearbox 1. The oil outlet of the fourth oil passage 606 faces the position of the second idler gear 303 to provide lubricating oil. The fifth oil passage 605 is connected to the fourth oil passage 606. The oil outlet of the fifth oil passage 605 faces the position of the second hydraulic pump 9 to provide lubricating oil. During lubrication, oil is taken from the engine block oil passage of the engine 100. The engine oil is connected to the inlet of the built-in oil passage on the left and right sides of the gearbox 1 through the left and right external oil pipes (not labeled), namely the ports of the first oil passage 604 and the fourth oil passage 606. Then, the engine oil is delivered to the bearings, each gear and the air pump 7 and other places that need lubrication through the built-in first oil passage 604 to the sixth oil passage 602 to ensure the reliable operation of each component.

[0044] See Figure 4 As shown, the lubrication passage 6 also includes a sixth oil passage 602 arranged radially along the idler gear shaft for lubricating the first bearing S4.

[0045] See Figure 5 As shown, the third oil passage 601 includes a first port 6011 and a second port 6012. The first port 6011 is located on the outer ring of the first extension 3063 and close to the hydraulic pump gear meshing portion 3062. The second port 6012 is located on the inner ring of the first hydraulic pump gear 306 and close to the second extension 3061 relative to the first port 6011. Furthermore, the second port 6012 is located on the inner ring of the first hydraulic pump gear 306 and corresponds to the hydraulic pump gear meshing portion 3062, thereby achieving better lubrication of the hydraulic pump gear, the second bearing S5, and the third bearing S2.

[0046] See Figure 8 As shown, according to another aspect of this embodiment, an engine 100 is provided, including a cylinder block 11, an air pump 7, a first hydraulic pump 8, a second hydraulic pump 9, a gear pump 10, and a rear-end power output device of the above-described scheme.

[0047] This utility model provides an engine rear-end power output device and an engine. By designing the rear-end power output device, the space and structure are optimized while meeting the hydraulic requirements of the whole vehicle, ensuring the requirements of different transmission speed ratios, improving the compactness of the structure, and also ensuring the reliability of the operation of each component.

[0048] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A power output device for the rear end of an engine, characterized in that, include: Gearbox; A gearbox cover, which is connected to the gearbox to form a receiving space; A gear assembly, wherein the gear assembly is disposed in the receiving space; The gear assembly includes: A crankshaft drive gear, which provides power to the gear assembly; A first idler gear meshes with the upper side of the crankshaft drive gear; A second idler gear meshes with the crankshaft drive gear on the other side above it; The first hydraulic pump gear is positioned obliquely above the first idler gear, relatively away from the second idler gear, and meshes with the first idler gear to output power to the first hydraulic pump. The second hydraulic pump gear is positioned obliquely above the second idler gear, relatively away from the first idler gear, and meshes with the second idler gear to output power to the second hydraulic pump. The third idler gear is coaxial with the first idler gear and is close to the gearbox relative to the first idler gear; the third idler gear rotates synchronously with the first idler gear. The fourth idler gear is coaxial with the second idler gear and is close to the gearbox relative to the second idler gear; the fourth idler gear rotates synchronously with the second idler gear. An air pump gear is positioned obliquely below the third idler gear, away from the crankshaft drive gear, and meshes with the third idler gear to output power to the air pump. The gear pump gear is positioned obliquely below the fourth idler gear, away from the crankshaft drive gear, and meshes with the fourth idler gear to output power to the gear pump.

2. The engine rear-end power output device as described in claim 1, characterized in that, The third idler gear includes an idler gear meshing portion and a hub portion extending along the end face of the idler gear meshing portion toward the side away from the gearbox. The hub portion is placed in the inner ring of the first idler gear and is fixedly connected to the first idler gear. The fourth idler gear has the same structure as the third idler gear.

3. The engine rear-end power output device as described in claim 2, characterized in that, It also includes a first idler shaft passing through the third idler gear, a first bearing placed between the third idler gear and the first idler shaft, the first idler shaft being fixedly connected to the gearbox, the inner ring of the first bearing being fixed to the first idler shaft, and the outer ring of the first bearing being fixed to the hub portion.

4. The engine rear-end power output device as described in claim 3, characterized in that, It also includes a second bearing located between the first hydraulic pump gear and the gearbox cover, and a third bearing located between the first hydraulic pump gear and the gearbox.

5. The engine rear-end power output device as described in claim 4, characterized in that, The first hydraulic pump gear includes a hydraulic pump gear meshing portion, a first extension portion extending along the hydraulic pump gear meshing portion toward one side of the gearbox cover, and a second extension portion extending along the hydraulic pump gear meshing portion toward one side of the gearbox. The second bearing is sleeved on the outer ring of the first extension portion, and the third bearing is sleeved on the outer ring of the second extension portion.

6. The engine rear-end power output device as described in claim 5, characterized in that, It also includes a fourth bearing located on the inner ring of the fourth idler gear, a fifth bearing located between the second hydraulic pump gear and the gearbox cover, and a sixth bearing located between the second hydraulic pump gear and the gearbox.

7. The engine rear-end power output device as described in claim 6, characterized in that, It also includes a lubrication channel for supplying lubricating oil to the rear power output device.

8. The engine rear-end power output device as described in claim 7, characterized in that, The lubrication channel includes: The first oil passage is located inside the side wall of the gearbox, and the oil outlet of the first oil passage is directed toward the position of the first idler gear to provide lubricating oil. The second oil passage is located inside the side wall of the gearbox and communicates with the first oil passage. The oil outlet of the second oil passage is directed toward the first hydraulic pump position to provide lubricating oil. An oil passage nozzle is located in the second oil passage and corresponds to the position of the first hydraulic pump gear, with the opening of the oil passage nozzle facing the receiving space. The third oil passage is located on the first hydraulic pump gear and is obliquely inserted through the first hydraulic pump gear; The fourth oil passage is located inside the side wall of the gearbox, and the oil outlet of the fourth oil passage is directed toward the position of the second idler gear to provide lubricating oil. The fifth oil passage is connected to the fourth oil passage, and the oil outlet of the fifth oil passage is directed toward the position of the second hydraulic pump to provide lubricating oil.

9. The engine rear-end power output device as described in claim 7, characterized in that, The third oil passage includes a first port and a second port. The first port is located on the outer ring of the first extension and close to the hydraulic pump gear meshing portion. The second port is located on the inner ring of the first hydraulic pump gear and close to the second extension relative to the first port.

10. An engine, characterized in that, It includes a cylinder block, an air pump, a first hydraulic pump, a second hydraulic pump, a gear pump, and a rear power output device as described in claim 1 or 9.

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