Gearbox suspension structure of motor tricycle with rear engine

Abstract

A gearbox suspension structure of a motor tricycle with a rear engine comprises the engine, a gearbox and a rear wheel hub, the engine and the gearbox are both arranged on the rear portion of the motor tricycle and installed below the rear portion of a frame, an input shaft of the gearbox is connected with an output shaft of the engine, and the rear wheel hub is connected with the engine. A left bevel gear and a right bevel gear of a differential mechanism of the gearbox are respectively connected with a first ball cage shaft, and the first ball cage shafts are supported on a differential mechanism shell through bearings. The rear wheel hub is connected with a second ball cage shaft, the second ball cage shaft is used for being hung on a frame, and the second ball cage shaft is connected with the first ball cage shaft through a ball head transmission shaft. The rear wheels on the two sides of the motor tricycle adopting the structure are respectively connected with the plate spring through the second ball cage shaft and are suspended on the frame, a rear axle structure is reduced, the engine and the gearbox are arranged below the rear part of the frame in a rear-mounted manner, the activity space of a cab is increased, and the comfort is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of the suspension system of three-wheel motorcycles, and particularly relates to a transmission suspension structure of a rear-engine three-wheel motorcycle. Background Art

[0002] For the rear-wheel suspension of three-wheel motorcycles, the rear axle is connected to the vehicle frame through leaf springs to form the rear-wheel suspension. At present, a differential carrier for setting a differential is provided on the rear axle of the existing three-wheel motorcycle, and the left and right half shafts connected to the differential pass through the axle housing of the rear axle and are connected to the rear wheels. The power output by the differential is transmitted to the rear wheels through the half shafts. However, due to the function of the rear axle, when driving on an uneven road, when one rear wheel falls into a sunken pit, the other rear wheel will be lifted up and leave the road surface, causing the rear wheel to slip and making it difficult to drive normally.

[0003] At present, the engines of three-wheel motorcycles are usually arranged in the front. The engine is installed at the front of the three-wheel motorcycle, resulting in a small activity space in the cab and poor comfort. The power output by the engine is transmitted to the rear axle differential or the rear-mounted reducer through a drive shaft arranged longitudinally along the vehicle body. The manufacturing cost of this relatively long drive shaft is relatively high. Installed under the three-wheel motorcycle, it will also affect the ground clearance of the vehicle frame of the three-wheel motorcycle. If the engine is designed to be arranged at the rear, due to the rear axle structure of the three-wheel motorcycle, it will affect the layout and installation of the engine. How to solve the rear layout of the engine of three-wheel motorcycles has long been a problem that is difficult to solve. Summary of the Invention

[0004] The purpose of the utility model is to provide a transmission suspension structure of a rear-engine three-wheel motorcycle for the deficiencies of the prior art. With this structure, the two rear wheels of the three-wheel motorcycle are respectively suspended on the vehicle frame through the second constant velocity joint shaft leaf spring, reducing the rear axle structure, and the engine and transmission are installed at the rear lower part of the vehicle frame, increasing the activity space in the cab and improving the comfort.

[0005] The purpose of the utility model is realized as follows:

[0006] A transmission suspension structure of a rear-engine three-wheel motorcycle includes an engine, a transmission, and rear-wheel hubs. The engine and the transmission are both arranged at the rear of the three-wheel motorcycle, and the engine and the transmission are installed under the rear part of the vehicle frame. The input shaft of the transmission is connected to the output shaft of the engine. The left and right bevel gears of the differential of the transmission are respectively connected to a first constant velocity joint shaft, and the first constant velocity joint shaft is supported on the differential housing through bearings; the rear-wheel hub is connected to a second constant velocity joint shaft, and the second constant velocity joint shaft is used for suspension on the vehicle frame, and the second constant velocity joint shaft is connected to the first constant velocity joint shaft through a ball head drive shaft.

[0007] The transmission can be located on the left or right side horizontally, or on the front or rear side horizontally, or on the lower side vertically of the engine.

[0008] A cover plate is respectively arranged on the left and right sides of the differential. The cover plate is fixedly connected to the differential housing through bolts, and a sealing gasket is arranged between the cover plate and the differential housing.

[0009] Both the left bevel gear and the right bevel gear are supported on the differential housing through bearings.

[0010] A fixed seat is arranged on the rear wheel hub, and the fixed seat is connected to the second constant velocity joint shaft.

[0011] A connecting shaft is arranged on the fixed seat. One end of the connecting shaft is connected to the second constant velocity joint shaft, and the other end is limited by a fixing pin. The fixed seat is fixedly connected to the rear wheel hub through bolts.

[0012] The second constant velocity joint shaft is used to be suspended on the vehicle frame through a leaf spring.

[0013] Adopting the above scheme, both the engine and the transmission of the three-wheel motorcycle are installed below the rear part of the vehicle frame of the three-wheel motorcycle, increasing the activity space of the cab and improving the driving comfort.

[0014] The input shaft of the transmission is connected to the output shaft of the engine. The left bevel gear and the right bevel gear of the differential of the transmission are respectively connected to a first constant velocity joint shaft; the rear wheel hub is connected to a second constant velocity joint shaft. The second constant velocity joint shaft is used to be suspended on the vehicle frame through a leaf spring. The second constant velocity joint shaft is connected to the first constant velocity joint shaft through a ball head transmission shaft; for the three-wheel motorcycle with this structure, the two rear wheels are respectively connected and supported on the first constant velocity joint shaft on the transmission and the second constant velocity joint shaft on the rear wheel hub through the ball head transmission shaft. The rear wheel hub is supported on the leaf spring through the second constant velocity joint shaft, reducing the rear axle structure of the three-wheel motorcycle. The two rear wheels on both sides do not need to be on the same axis. When one rear wheel falls into a sunken pit, the other rear wheel is not affected and will not be lifted up, preventing the rear wheels of the three-wheel motorcycle from slipping and rolling over, and enabling it to continue to drive normally.

[0015] The transmission can be located on the left or right side horizontally, or on the front or rear side horizontally, or on the lower side vertically of the engine. The type of the engine or the installation position of the transmission and the engine can be replaced according to the model and usage requirements of the three-wheel motorcycle. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is Figure 1 the enlarged view at A in

[0018] Figure 3 is Figure 1Enlarged view at B in [the figure];

[0019] Figure 4 Structural schematic diagram of Embodiment 1 of the present utility model;

[0020] Figure 5 Structural schematic diagram of Embodiment 2 of the present utility model;

[0021] Figure 6 Structural schematic diagram of Embodiment 3 of the present utility model.

[0022] Explanation of reference numerals in the drawings: Engine 1, output shaft 1a, transmission 2, transmission housing 2-1, input shaft 2a, differential 3, differential housing 3-1, gasket 3-2a, cover plate 3-2b, left bevel gear 3a, right bevel gear 3b, ball head drive shaft 4, first constant velocity joint shaft 4a, second constant velocity joint shaft 4b, rear wheel hub 5, fixed seat 5a, connecting shaft 5a-1, fixing pin 5a-2. Detailed implementation manners

[0023] The following further explanations are made in conjunction with the drawings and specific implementation manners.

[0024] Refer to Figures 1 to 3 , a transmission suspension structure of a rear-engine three-wheel motorcycle, including an engine 1, a transmission 2, and a rear wheel hub 5. The engine 1 and the transmission 2 are both installed below the rear part of the frame of the three-wheel motorcycle, which is used to increase the activity space of the cab and improve the driving comfort.

[0025] The input shaft 2a of the transmission 2 is connected to the output shaft 1a of the engine 1. The left bevel gear 3a and the right bevel gear 3b of the differential 3 of the transmission 2 are respectively connected to a first constant velocity joint shaft 4a. The left bevel gear 3a and the right bevel gear 3b are both supported on the differential housing 3-1 through bearings, and the first constant velocity joint shaft 4a is supported on the differential housing 3-1 through a bearing;

[0026] A fixed seat 5a is fixedly connected to the rear wheel hub 5 through bolts. A connecting shaft 5a-1 is arranged on the fixed seat 5a. One end of the connecting shaft 5a-1 is connected to a second constant velocity joint shaft 4b, and the other end is limited by a fixing pin 5a-2. The second constant velocity joint shaft 4b is used to be suspended on the frame through a leaf spring, and the second constant velocity joint shaft 4b is connected to the first constant velocity joint shaft 4a through a ball head drive shaft 4.

[0027] A cover plate 3-2b is respectively arranged on the left and right sides of the differential 3. The cover plate 3-2b is fixedly connected to the differential housing 3-1 through bolts. A gasket 3-2a is arranged between the cover plate 3-2b and the differential housing 3-1, which is used to seal the differential 3 and prevent the internal lubricating oil of the differential 3 from flowing out. Embodiment

[0028] See Figure 4 Figure 1 shows an embodiment of the transmission suspension structure of a rear - engine three - wheel motorcycle with the transmission 2 placed vertically below the engine 1. The input shaft 2a of the transmission 2 is connected to the output shaft 1a of the engine 1. The left bevel gear 3a and the right bevel gear 3b of the differential 3 in the transmission 2 are respectively connected to a first constant velocity joint shaft 4a. The first constant velocity joint shaft 4a is supported by bearings on the differential housing 3 - 1, and the first constant velocity joint shaft 4a is connected to the rear wheel through a ball head drive shaft 4. Embodiment

[0029] See Figure 5 Figure 2 shows an embodiment of the transmission suspension structure of a rear - engine three - wheel motorcycle with the transmission 2 placed horizontally on the left and right sides of the engine 1. The input shaft 2a of the transmission 2 is connected to the output shaft 1a of the engine 1. The left bevel gear 3a and the right bevel gear 3b of the differential 3 in the transmission 2 are respectively connected to a first constant velocity joint shaft 4a. The first constant velocity joint shaft 4a is supported by bearings on the transmission housing 2 - 1, and the first constant velocity joint shaft 4a is connected to the rear wheel through a ball head drive shaft 4. Embodiment

[0030] See Figure 6 Figure 3 shows an embodiment of the transmission suspension structure of a rear - engine three - wheel motorcycle with the transmission 2 placed horizontally in the front and rear of the engine 1. The input shaft 2a of the transmission 2 is connected to the output shaft 1a of the engine 1. The left bevel gear 3a and the right bevel gear 3b of the differential 3 in the transmission 2 are respectively connected to a first constant velocity joint shaft 4a. The first constant velocity joint shaft 4a is supported by bearings on the transmission housing 2 - 1, and the first constant velocity joint shaft 4a is connected to the rear wheel through a ball head drive shaft 4.

[0031] For the three - wheel motorcycle adopting the present utility model, both the engine 1 and the transmission 2 are installed below the rear part of the frame of the three - wheel motorcycle, which increases the activity space of the cab and improves the driving comfort. Moreover, the two rear wheels of the three - wheel motorcycle are respectively connected and supported by the first constant velocity joint shaft 4a on the transmission 2 through the ball head drive shaft 4 and the second constant velocity joint shaft 4b on the rear - wheel hub 5. The rear - wheel hub 5 is supported by the leaf spring through the second constant velocity joint shaft 4b, reducing the rear - axle structure of the three - wheel motorcycle. When one rear wheel falls into a sunken pit, the other rear wheel is not affected and will not be lifted, preventing the rear wheels of the three - wheel motorcycle from slipping and rolling over. At the same time, the transmission 2 can be located on the horizontal left and right sides or the horizontal front and rear sides or the vertical lower side of the engine 1, and the type of the engine 1 or the installation positions of the transmission 2 and the engine 1 can be replaced according to the model and usage requirements of the three - wheel motorcycle.

[0032] The above - mentioned are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Those skilled in the art, without departing from the spirit of the present utility model, any modifications made to the present utility model fall within the protection scope of the present utility model.

Claims

1. A transmission suspension structure for a rear-engine three-wheeled motorcycle, comprising an engine (1), a transmission (2), and a rear wheel hub (5), characterized in that: The engine (1) and the gearbox (2) are both arranged at the rear of the three-wheeled motorcycle. The engine (1) and the gearbox (2) are mounted below the rear of the frame. The input shaft (2a) of the gearbox (2) is connected to the output shaft (1a) of the engine (1). The left bevel gear (3a) and the right bevel gear (3b) of the differential (3) of the gearbox (2) are respectively connected to a first ball cage shaft (4a). The first ball cage shaft (4a) is supported on the differential housing (3-1) via a bearing. The rear wheel hub (5) is connected to a second ball cage shaft (4b). The second ball cage shaft (4b) is used for being suspended on the frame. The second ball cage shaft (4b) is connected to the first ball cage shaft (4a) via a ball head transmission shaft (4).

2. The transmission suspension structure of the rear-engine three-wheeled motorcycle according to claim 1, characterized in that: The gearbox (2) may be located on the horizontal left and right sides, the horizontal front and rear sides, or the vertical lower side of the engine (1).

3. The transmission suspension structure of the rear-engine three-wheeled motorcycle according to claim 1, characterized in that: A cover plate (3-2b) is provided on the left and right sides of the differential (3), respectively; the cover plate (3-2b) is fixedly connected to the differential housing (3-1) by means of bolts; and a sealing gasket (3-2a) is provided between the cover plate (3-2b) and the differential housing (3-1).

4. The transmission suspension structure of the rear-engine three-wheeled motorcycle according to claim 1, characterized in that: The left bevel gear (3a) and the right bevel gear (3b) are both supported on the differential housing (3-1) via bearings.

5. The transmission suspension structure of the rear-engine three-wheeled motorcycle according to claim 1, characterized in that: A fixing seat (5a) is provided on the rear wheel hub (5), and the fixing seat (5a) is connected to the second ball cage shaft (4b).

6. The transmission suspension structure of a rear-engine three-wheeled motorcycle according to claim 5, characterized in that: A connecting shaft (5a-1) is arranged on the fixing seat (5a), one end of the connecting shaft (5a-1) is connected to the second ball cage shaft (4b), and the other end is limited by a fixing pin (5a-2), and the fixing seat (5a) is fixedly connected to the rear wheel hub (5) by bolts.

7. The transmission suspension structure of a rear-engine three-wheeled motorcycle according to claim 1, characterized in that: The second ball cage shaft (4b) is used for being suspended on the vehicle frame via a leaf spring.

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