Motor tricycle engine

Abstract

The motor tricycle engine comprises a box body, an oil storage cavity is formed in the bottom of the box body, an oil inlet and an oil pump communicated with the oil storage cavity are arranged on the box body, a first flow dividing cavity communicated with an oil outlet of the oil pump is formed in the box body, and a power output shaft is installed on the box body. A bearing used for supporting the power output shaft to rotate is arranged on the box body, a bearing lubricating cavity is formed in the side, away from the input end of the output shaft, of the bearing on the box body, a first engine oil cavity communicated with the bearing lubricating cavity is formed in the box body, and the first engine oil cavity is communicated with the first flow dividing cavity. The power output shaft is located on the side, away from the bearing, of the bearing lubricating cavity and is in sealing fit with the box. According to the scheme, the problem that the power output shaft of the engine needs to be frequently maintained due to insufficient lubrication is solved.

Description

Technical Field

[0001] This invention relates to a three-wheeled motorcycle engine. Background Technology

[0002] The engine of a three-wheeled motorcycle stores oil inside. An oil pump and oil passages deliver the oil to the cylinder head to lubricate and cool the components inside the cylinder head. The crankshaft, connecting rod, and transmission gears of the engine are mainly lubricated by splashing oil as they rotate.

[0003] Chinese patent document CN117072277A discloses an engine assembly and a motorcycle, comprising: a crankcase forming a receiving space; an oil pump at least partially disposed within the receiving space, and the oil pump including an inner cavity; a transmission gear set installed within the receiving space, and the transmission gear set at least partially located above the oil pump; and an oil pump cover with a vent hole, one end of which communicates with the inner cavity, and the other end of which faces away from the inner cavity and is disposed towards the transmission gear set and communicates with the receiving space. This prior art engine assembly, by providing a vent hole on the oil pump cover, allows the oil pump to quickly vent during maintenance and oil changes, shortening the venting time and rapidly establishing oil pressure to deliver oil to all lubrication points in the engine assembly. This effectively prevents bearing failure due to poor venting by the oil pump during maintenance and oil changes, thereby improving the service life of the engine assembly. Furthermore, the vent allows the oil pump to spray oil onto the transmission gear set, thus lubricating and cooling the gear set, reducing wear on the gear assembly, reducing noise from meshing slippage, and improving the service life and durability of the transmission gear set.

[0004] In the aforementioned prior art solutions, enhanced lubrication of the gear set is achieved by creating vent holes on the oil pump cover that allow direct oil injection into the gear set. However, for components such as the power output shaft, which are located far from the oil pump and are easily obstructed, splash lubrication remains the primary method. This leads to premature wear of these components, requiring frequent engine maintenance and thus affecting engine reliability. Summary of the Invention

[0005] The purpose of this invention is to provide a three-wheeled motorcycle engine that solves the problem of insufficient lubrication of the engine's power output shaft, which requires frequent maintenance.

[0006] To achieve the above objectives, the basic solution of the present invention provides a three-wheeled motorcycle engine, including a housing, an oil storage chamber at the bottom of the housing, an oil pump with an oil inlet communicating with the oil storage chamber, a first distribution chamber communicating with the oil outlet of the oil pump, a power output shaft mounted on the housing, a bearing for supporting the rotation of the power output shaft on the housing, a bearing lubrication chamber on the side of the housing located away from the input end of the bearing, a first oil chamber communicating with the bearing lubrication chamber, the first oil chamber communicating with the first distribution chamber, and the power output shaft located on the side of the bearing lubrication chamber away from the bearing and sealingly fitted with the housing.

[0007] Preferably, the first flow divider cavity is located at the top of the first flow divider cavity, where it communicates with the first oil chamber.

[0008] Preferably, the bearing is a deep groove ball bearing.

[0009] Preferably, the power output shaft and the housing are sealed together by a double-lip seal.

[0010] Preferably, the input end of the power output shaft is connected to a bevel gear, and a second oil chamber is provided on the housing. The second oil chamber is connected to the first oil chamber, and the second oil chamber is provided with an oil injection hole facing the mating surface of the bevel gear.

[0011] Preferably, the second oil chamber is located above the bevel gear.

[0012] Preferably, the bottom of the first flow divider is connected to the oil outlet of the oil pump.

[0013] Preferably, the oil pump is connected to the engine crankshaft via a gear set. This facilitates the oil pump obtaining power for operation.

[0014] The present invention has the following beneficial effects: 1. During operation, the oil pump delivers oil from the oil reservoir to the first distribution chamber. Then, under pressure, the oil flows from the first distribution chamber into the first oil chamber. Under pressure, the oil in the first oil chamber enters the bearing lubrication chamber and flows out through the bearing cage, thus lubricating the bearing and ensuring its lubrication effect. At the same time, as the oil flows out through the bearing, it also carries away the heat from the bearing, thereby cooling the bearing and preventing it from overheating and affecting the lubrication effect of the oil. This reduces the need for frequent maintenance due to insufficient lubrication of the power output shaft.

[0015] 2. By connecting the top of the first distribution chamber to the first oil chamber, a large amount of oil is retained in the first distribution chamber after the engine is stopped. This allows the oil pump to quickly fill the first distribution chamber when the engine is restarted, enabling the oil to reach the parts that need lubrication quickly. This avoids accelerated wear caused by insufficient lubrication due to the long oil flow time during engine start-up.

[0016] 3. The design of the second oil chamber and the oil injection hole ensures that the oil sprayed from the injection hole lubricates the bevel gear. Especially when the output power of the power output shaft is high, it can effectively improve the working condition of the bevel gear at the input end of the power output shaft, thereby preventing the bevel gear from wearing out too quickly and being damaged.

[0017] 4. By using this invention, the lubrication effect of bearings and bevel gears can be improved, and the service life of bearings and bevel gears can be extended by at least three times compared with splash lubrication. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an embodiment of a three-wheeled motorcycle engine according to the present invention; Figure 2 for Figure 1 A schematic diagram of the right-side box section; Figure 3 for Figure 1 Axial view of the middle housing along the power output shaft; Figure 4 for Figure 2 A schematic diagram showing the connection between the first oil chamber and the first diversion chamber. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: oil pump 1, gear set 2, crankshaft 3, first oil chamber 4, bearing 5, bearing housing 6, bearing lubrication chamber 7, double lip seal 8, power take-off shaft 9, right housing 10, first flow divider chamber 11, through hole 12, oil reservoir 13, left housing 14, second oil chamber 15, oil injection hole 16, and bevel gear 17.

[0020] The basic implementation examples are as follows: Figures 1 to 4 As shown: A three-wheeled motorcycle engine includes a housing, with an oil reservoir 13 at the bottom of the housing. An oil pump 1 with an oil inlet communicating with the oil reservoir 13 is installed on the housing. The oil pump 1 is connected to the crankshaft 3 of the engine via a gear set 2, thereby enabling the crankshaft 3 to drive the oil pump 1 to operate through the gear set 2. In this embodiment, for ease of manufacturing, the housing is formed by fastening together a left housing 14 and a right housing 10, with the oil pump 1 mounted on the right housing 10.

[0021] The housing has a first distribution chamber 11 connected to the oil outlet of the oil pump 1. A portion of the oil in the first distribution chamber 11 lubricates components such as the engine cylinder head. In this embodiment, the first distribution chamber 11 is located on the right housing 10. Preferably, the bottom of the first distribution chamber 11 is connected to the oil outlet of the oil pump 1, facilitating rapid filling of the first distribution chamber 11 with oil. A power output shaft 9 is mounted on the housing, used to output the power generated by the engine crankshaft 3 to the outside of the engine. A bearing 5 is provided on the housing to support the rotation of the power output shaft 9. In this embodiment, the bearing 5 is preferably a deep groove ball bearing 5.

[0022] A bearing lubrication chamber 7 is provided on the side of the housing opposite to the input end of the bearing 5, away from the output shaft. A first oil chamber 4, communicating with the bearing lubrication chamber 7, is also provided on the housing. The first oil chamber 4 is connected to a first distribution chamber 11. In this embodiment, the first distribution chamber 11 is connected to the first oil chamber 4 at its top, specifically through a through hole 12 at its top. In this embodiment, the bearing lubrication chamber 7 is located on the bearing 5 seat on the right housing 10. An oil passage on the right housing 10 connects the first oil chamber 4 and the first distribution chamber 11. The power output shaft 9 is located on the side of the bearing lubrication chamber 7 away from the bearing 5 and is sealed to the housing. In this embodiment, the power output shaft 9 and the bearing 5 seat of the right housing 10 are sealed together by a double-lip seal 8, ensuring that the oil in the bearing lubrication chamber 7 can only flow towards the bearing 5 and not away from it.

[0023] The input end of the power take-off shaft 9 is connected to a bevel gear 17. A second oil chamber 15 is provided on the housing, which communicates with the first oil chamber 4. The second oil chamber 15 has an oil injection hole 16 facing the mating surface of the bevel gear 17. In this embodiment, the second oil chamber 15 is located on the left housing 14, and is connected through an oil passage hole on the sealing gasket between the left and right housings 10. The second oil chamber 15 is located above the bevel gear 17, so that the oil injection hole 16 is located directly above the mating surface of the bevel gear 17, allowing the oil sprayed from the oil injection hole 16 to better land on the mating surface of the bevel gear 17.

[0024] The specific implementation process is as follows: Figure 1 , Figure 2 and Figure 3The direction indicated by the middle arrow is the flow direction of the engine oil. During operation, the oil pump 1 delivers the engine oil from the oil reservoir 13 to the first distribution chamber 11. Then, under pressure, the engine oil flows from the first distribution chamber 11 into the first oil chamber 4. Under pressure, the engine oil in the first oil chamber 4 enters the bearing lubrication chamber 7, passes through the cage of the bearing 5, and flows out, collecting back into the oil reservoir 13. This lubricates the bearing 5, ensuring its lubrication effect. Simultaneously, as the oil flows out through the bearing 5, it also carries away heat from the bearing 5, thus cooling it and preventing overheating that could affect the lubrication effect. The second oil chamber 15 and the oil injection hole 16 ensure that the oil sprayed from the injection hole 16 directly lubricates the bevel gear 17. Especially when the output power of the power output shaft 9 is high, this effectively improves the working condition of the bevel gear 17 at the input end of the power output shaft 9, preventing the bevel gear 17 from wearing out too quickly and becoming damaged.

[0025] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics in the solutions is not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A three-wheeled motorcycle engine, comprising a housing, an oil storage chamber at the bottom of the housing, an oil pump with an oil inlet communicating with the oil storage chamber on the housing, and a first diversion chamber communicating with the oil outlet of the oil pump on the housing, characterized in that: A power output shaft is mounted on the housing, and a bearing for supporting the rotation of the power output shaft is provided on the housing. A bearing lubrication chamber is provided on the side of the housing located away from the input end of the bearing. A first oil chamber is provided on the housing and communicates with the bearing lubrication chamber. The first oil chamber is communicated with a first diverter chamber. The power output shaft is located on the side of the bearing lubrication chamber away from the bearing and is sealed to the housing.

2. The three-wheeled motorcycle engine according to claim 1, characterized in that: The first flow divider cavity is connected to the first oil chamber at the top of the first flow divider cavity.

3. A three-wheeled motorcycle engine according to claim 2, characterized in that: The bearing is a deep groove ball bearing.

4. A three-wheeled motorcycle engine according to claim 3, characterized in that: The power output shaft and the housing are sealed together by a double-lip seal.

5. A three-wheeled motorcycle engine according to any one of claims 1-4, characterized in that: The input end of the power output shaft is connected to a bevel gear, and a second oil chamber is provided on the housing. The second oil chamber is connected to the first oil chamber, and the second oil chamber is provided with an oil injection hole facing the mating surface of the bevel gear.

6. A three-wheeled motorcycle engine according to claim 5, characterized in that: The second oil chamber is located above the bevel gear.

7. A three-wheeled motorcycle engine according to claim 6, characterized in that: The bottom of the first flow divider is connected to the oil outlet of the oil pump.

8. A three-wheeled motorcycle engine according to claim 7, characterized in that: The oil pump is connected to the engine crankshaft via a gear set.

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