Engine oil pump arrangement scheme adaptive to tractor with shortened wheelbase

Abstract

The utility model relates to an engine oil pump arrangement scheme adaptive to a tractor with shortened wheelbase, which is characterized in that the installation position of an oil pump is moved forwards to a lower end installation surface of an engine body corresponding to the central position of a cylinder of an engine; a traditional integral structure of the engine oil pump is changed into a split structure, the engine oil pump comprises an engine oil pump gear, an engine oil pump suction filter and a connecting pipeline from an engine body to the engine oil pump, the engine oil pump gear is driven by an engine crankshaft gear and is in meshing transmission with the engine crankshaft gear, and the engine oil pump suction filter is used for sucking engine oil of an oil pan into the engine oil pump. The connecting pipeline from the engine body to the engine oil pump is used for conveying engine oil sucked into the engine oil pump into a main oil duct cavity of the engine body. Only the scheme of the engine oil pump is adjusted, the positions of an oil inlet channel, an oil outlet channel and a connector of engine oil of an original engine body are reserved, the product development cost is reduced to the maximum extent, and meanwhile the stable performance of an original engine type is kept.

Description

Technical Field

[0001] The utility model relates to an engine oil pump arrangement scheme adapted for a tractor with a shortened wheelbase, belonging to the technical field of engine oil pumps. Background Art

[0002] In order to adapt to the problem of small turning radius of tractors operating in small working plots such as greenhouses, the market has optimized the design of tractors based on demand. The front axle of traditional tractors has been moved backward from the lower end of the fan along the bottom surface of the oil pan towards the flywheel housing and arranged at the front end of the flywheel housing, shortening the wheelbase of the front and rear wheels and further reducing the turning radius.

[0003] The aforementioned changes to the tractor have caused the front axle to be moved back to the third and fourth cylinders of the engine. This rearward shift occupies the original space of the oil pan, requiring the bottom of the oil pan of the third and fourth cylinders to be brought significantly closer to the end face of the tractor body. Currently, most engines suitable for this type of vehicle have the oil pump located in the third and fourth cylinders of the engine. The oil pump and filter are an integrated structure, and the overall height requires sufficient space in the oil pan. This spatial arrangement interferes with the rearward position of the front axle in the aforementioned tractor models suitable for shortened wheelbases, and cannot meet the matching conditions. In other words, engines with oil pumps located in the third and fourth cylinders cannot meet the spatial arrangement requirements of such shortened wheelbase tractors, resulting in the inability of such engines to adapt to the aforementioned tractor models, resulting in poor engine adaptability and indirectly affecting engine production and economic growth. Utility Model Content

[0004] The utility model aims to propose an engine oil pump arrangement scheme adapted to tractors with shortened wheelbases, so as to solve the problem that engines with three- or four-cylinder oil pump arrangements cannot meet the requirements of tractors with shortened wheelbases and reduced turning radius.

[0005] In order to solve the above problems, the technical solution adopted by the present utility model is:

[0006] An engine oil pump arrangement scheme adapted for a tractor with a shortened wheelbase is special in that the installation position of the oil pump is moved forward to the lower end installation surface of the engine body corresponding to the center position of a cylinder of the engine; the traditional integral structure of the oil pump is changed to a split structure, including an oil pump gear, an oil pump filter and a connecting pipeline from the engine body to the oil pump; the oil pump gear is driven by the engine crankshaft gear and meshes with the same; the oil pump filter is used to suck oil from the engine oil pan into the oil pump; the connecting pipeline from the engine body to the oil pump is used to transport the oil sucked into the oil pump to the main oil channel cavity of the engine body.

[0007] Furthermore, the oil pump is mounted on the lower end mounting surface of the engine body through the fastening bolt holes on the oil pump body.

[0008] Furthermore, in order to ensure normal meshing of the oil pump gear and the engine crankshaft gear, the height of the first gear main bearing cover of the engine body is lowered.

[0009] The present invention provides an engine oil pump layout solution suitable for tractors with shortened wheelbases. The improvements and optimization measures include: changing the connection between the oil pump's filter and oil inlet pipe from an integral structure to a split structure, moving the oil pump and filter forward, and changing the oil pump drive from the original camshaft bevel gear to an external crankshaft gear meshing drive. Furthermore, to ensure proper meshing of the oil pump teeth with the crankshaft gear, the height of the first gear main bearing cap of the engine body is lowered. To further reduce product development costs and performance, the original oil lubrication channel on the engine body is retained, and a connecting line from the engine body to the oil pump is designed to connect the oil channel on the engine body to the oil pump. Finally, the engine oil pump is relocated from the third and fourth cylinders to in front of the first cylinder, leaving sufficient space at the third and fourth cylinder oil pans for the tractor's front axle layout, thereby solving the problem of adapting to tractors with shortened wheelbases and rearward-shifted front axles.

[0010] Compared with existing similar products or methods, the technical solution of the present invention has the following advantages or beneficial technical effects: the adaptability range of the engine is increased, the versatility is stronger, the matching of the whole machine is more diversified, the output of the product is increased, and the economic income is indirectly increased; secondly, the original body is kept unchanged, which further reduces the product development cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The engine status diagram for the rearward movement of the front axle of a tractor used in greenhouse operations;

[0012] Figure 2 This is a schematic diagram of the overall layout of the oil pump in Example 1;

[0013] Figure 3 for Figure 2 A top view of

[0014] Figure 4 for Figure 2 Side view of;

[0015] Figure 5 This is a design diagram of the main bearing cap on the engine block;

[0016] Figure 6 for Figure 5 Side view of;

[0017] Figure 7 for Figure 5 Top view of . DETAILED DESCRIPTION

[0018] The present invention is described in detail below with reference to the accompanying drawings.

[0019] Example 1

[0020] Figure 1 This diagram shows the engine status for a tractor with a rearward front axle to shorten the wheelbase. The structural components in the diagram include the engine oil pan 1, the tractor front axle 2, the oil pump position 3 between cylinders 3 and 4, the center position 4 of the engine's fourth cylinder, the center position 5 of the engine's third cylinder, the center position 6 of the engine's second cylinder, the center position 7 of the engine's first cylinder, and the newly designed oil pump position 8.

[0021] The oil pump position 3 between cylinders 3 and 4 is the pre-optimization position. As can be seen from the figure, the oil pump's height interferes with the tractor's front axle 2, and this position does not meet the current layout requirements for the tractor's front axle 2. The oil pump solution designed in this embodiment is located at a newly designed oil pump position 8, forward of the center position 7 of the engine's first cylinder, completely clear of the tractor's front axle 2, meeting the layout requirements for the tractor's front axle after the wheelbase is shortened.

[0022] Figure 2-4 This is the overall layout of the oil pump after it has been moved forward, specifically including the engine crankshaft gear 9, oil pump gear 10, oil pump filter 11, oil pump 12, connecting pipeline 13 from the engine block to the oil pump, and engine block 14. The specific layout is as follows: the oil pump 12 is mounted on the lower mounting surface of the engine block 14 at the center of the first cylinder 7 of the engine through the fastening bolt holes on the oil pump block. The oil pump gear 10 of the oil pump 12 is externally meshed with the engine crankshaft gear 9. When the engine rotates, the engine crankshaft gear 9 drives the oil pump gear 10 to rotate, driving the rotation between the rotors in the oil pump cavity to form a vacuum chamber. The oil from the engine oil pan 1 is sucked into the oil pump 14 through the oil pump filter 11. The oil sucked in by the oil pump is then delivered to the main oil channel cavity of the engine block 14 through the connecting pipeline 13 from the engine block to the oil pump. The layout of the entire solution does not require changes to the engine body, further reducing product costs while meeting the matching requirements of the tractor's short wheelbase and maintaining engine performance.

[0023] Figure 5-7 To facilitate the implementation of the newly designed oil pump solution, a diagram depicting the design of the main bearing caps on engine block 14 is provided. Engine block 14 comprises five main bearing caps, bolted to the engine block: first gear main bearing cap 15, second gear main bearing cap 16, third gear main bearing cap 17, fourth gear main bearing cap 18, and fifth gear main bearing cap 19. To ensure that oil pump gear 10 meshes with engine crankshaft gear 9 after the oil pump is moved forward, the structure of first gear main bearing cap 15 has been redesigned, while maintaining its strength. This reduces its overall height to accommodate the installation of oil pump 12 while ensuring efficient transmission between engine crankshaft gear 9 and oil pump gear 10.

[0024] The utility model provides an engine oil pump arrangement scheme adapted for a tractor with a shortened wheelbase, and its main technical effects include:

[0025] 1. Solve the problem that the oil pump is arranged at the third or fourth cylinder position of the engine, which cannot meet the market demand for tractors with shortened wheelbase and rearward front axle.

[0026] 2. Only the oil pump solution was adjusted, retaining the original oil inlet and outlet channels and interface positions of the engine body, minimizing product development costs while maintaining the stable performance of the original model.

Claims

1. An engine oil pump arrangement scheme adapted for a shortened wheelbase tractor, characterized in that: The installation position of the oil pump is moved forward to the lower end installation surface of the engine body corresponding to the center position of the first cylinder of the engine; the traditional integral structure of the oil pump is changed to a split structure, including an oil pump gear, an oil pump filter and a connecting pipeline from the engine body to the oil pump. The oil pump gear is driven by the engine crankshaft gear and meshes with it. The oil pump filter is used to suck the oil from the oil pan into the oil pump. The connecting pipeline from the engine body to the oil pump is used to transport the oil sucked into the oil pump to the main oil channel cavity of the engine body.

2. The engine oil pump arrangement scheme adapted for a shortened wheelbase tractor according to claim 1, characterized in that: The oil pump is mounted on the lower end mounting surface of the engine body through the fastening bolt holes on the oil pump body.

3. The engine oil pump arrangement scheme adapted for a shortened wheelbase tractor according to claim 1, characterized in that: In order to ensure the normal engagement of the oil pump gear and the engine crankshaft gear, the height of the first gear main bearing cover of the engine body is lowered.

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