Four-wheel drive system of Baba off-road racing vehicle

Abstract

A four-wheel drive system of a Baba off-road racing vehicle comprises a clutch assembly, an integrated device, a universal transmission device and a half shaft, a clutch chain wheel of the clutch assembly is fixedly connected with a clutch shell, one side of a speed reducer assembly of the integrated device is connected with a transmission assembly, and the other side of the speed reducer assembly of the integrated device is connected with a transfer case assembly. The two ends of a transmission shaft of the universal transmission device are connected with the universal joints through flat keys respectively, one end of a rear half shaft of the half shaft is connected with an output shaft of the speed reducer through a spline, and the other end of the rear half shaft is connected with wheels through splines and drives the wheels. The all-terrain off-road racing vehicle has the advantages of being integrated in design, reliable in power transmission, high in applicability, compact in structure and the like, is suitable for being safely driven on various rugged road sections including rocks, dunes, logs, abrupt slopes, muddy and shallow water and roads under various weather conditions such as rainfall, snowing and icing, and can achieve all-terrain off-road racing vehicles.

Description

Technical Field

[0001] The utility model relates to the technical field of off-road vehicle driving systems, in particular to a four-wheel driving system for a Baja off-road racing car. Background Art

[0002] The transmission system used in the driving process of the car is composed of a clutch, a transmission, a universal transmission device, and related drive axles and half shafts, that is, a power transmission device that connects the engine and the four-wheel drive of the car. The current drive system used by Baja racing cars is designed and assembled separately from the clutch and transmission, and is driven by simple gear meshing, which has low transmission efficiency, complex structure and high manufacturing cost.

[0003] Chinese Patent 202210198720.8 discloses a full-time four-wheel drive transmission system for a small all-terrain vehicle with a rear-mounted steering trapezoid. The four-wheel drive transmission system of this design is not highly integrated and has poor applicability; Chinese Patent 202210286429.6 discloses an invention of a four-wheel drive system and a vehicle. This invention provides a four-wheel drive system and a vehicle to address the problem that the transmission mode of the current four-wheel drive system will lead to low transmission efficiency of the rear drive axle. The system and the vehicle have low applicability and certain limitations.

[0004] At present, there has not been an innovative invention design of a four-wheel drive system for a Baja off-road racing car with the characteristics of integrated design, reliable power transmission, strong applicability, compact structure, high power, good fuel economy, and low manufacturing cost. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, such as low applicability, unreliable power transmission and low integrated design, the purpose of the utility model is to provide a four-wheel drive system for a Baja off-road racing car, which has the characteristics of integrated design, reliable power transmission, strong applicability and compact structure, and is suitable for safe driving on various rugged sections including rocks, dunes, logs, steep slopes, mud and shallow water, as well as on roads in various climatic conditions such as rain, snow and ice, and can realize all-terrain off-road racing.

[0006] The technical solution of the utility model is: a four-wheel drive system for a Baja off-road racing car, including a clutch assembly, an integrated device, a universal transmission device and a half shaft, and the specific structure and connection relationship are as follows:

[0007] The clutch assembly comprises a clutch housing, a clutch sprocket and a drive chain, wherein the clutch sprocket is connected to the clutch housing by a fixed connection, one end of the drive chain is connected to the clutch sprocket by a chain drive, and the other end is connected to the driven sprocket;

[0008] The integrated device comprises a transmission assembly, a speed reducer assembly and a transfer case assembly, wherein one side of the speed reducer assembly is connected to the transmission assembly, and the other side is connected to the transfer case assembly; the transmission assembly comprises a transmission, a transmission input shaft, a sprocket flange and a driven sprocket, wherein the transmission input shaft is connected to the driven sprocket through a spline, and the driven sprocket is connected to the sprocket flange through a bolt; the speed reducer assembly comprises a speed reducer output shaft, wherein one end of the speed reducer output shaft is connected to the right rear half shaft through a spline, and the other end is connected to the left rear half shaft through a spline; the transfer case assembly comprises a transfer case output shaft, a switching cable and a switching rod, wherein one end of the transfer case output shaft is connected to the first universal joint through a flat key, and the other end is fixedly connected to the transfer case, and one end of the switching cable is connected to the transfer case, and the other end is connected to the switching rod;

[0009] The universal transmission device comprises a first universal joint, a transmission shaft, a second universal joint and a differential, wherein one end of the first universal joint is connected to the transfer case output shaft through a flat key, and the other end is connected to the transmission shaft, one end of the transmission shaft is connected to the first universal joint through a flat key, and the other end is connected to the second universal joint through a flat key, the second universal joint is connected to the differential through a flat key, one end of the differential is connected to the right front half shaft through a spline, and the other end is connected to the left front second half shaft through a spline;

[0010] The half-shafts include a front half-shaft and a rear half-shaft, the front half-shaft includes a right front half-shaft, a left front second half-shaft and a left front first half-shaft, one end of the right front half-shaft is connected to the differential through a spline, and the other end is connected to the wheel through a spline, one end of the left front second half-shaft is connected to the differential through a spline, and the other end is connected to the left front first half-shaft through a spline, the left front first half-shaft is connected to the left front second half-shaft through a spline, and the other end is linked to the wheel through a spline; the rear half-shafts include a right rear half-shaft and a left rear half-shaft, one end of the right rear half-shaft is connected to the reducer output shaft through a spline, and the other end is connected to the wheel through a spline, one end of the left rear half-shaft is connected to the reducer output shaft through a spline, and the other end is connected to the wheel through a spline.

[0011] The driven sprocket is embedded with buffer rubber at the connection between the driven sprocket and the sprocket flange through bolts.

[0012] The keyway of the sprocket flange is a hexagonal spline keyway.

[0013] The outstanding advantages of the utility model are:

[0014] 1. Compared with the commonly used CVT belt-driven clutch, which has no clutch and thus has the problems of incomplete separation and slipping in engagement, the clutch designed in the utility model can realize automatic engagement and separation. Through the rigid connection, the power engagement is more reliable and stable, and the separation is faster and more thorough.

[0015] 2. Compared with the belt drive commonly used in other Baja racing cars, the utility model uses a combination of chain drive and gear drive, which has higher mechanical transmission efficiency, is more stable, more reliable, has a longer service life, and is more convenient to maintain.

[0016] 3. The transmission of the integrated device designed in the utility model is a six-speed sequential transmission, which has better controllability and high transmission efficiency.

[0017] 4. The transmission, reducer and transfer case are integrated into a design that makes the structure more compact, the volume smaller, the layout occupies less space and the racing car lighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the structure of a four-wheel drive system of a Baja off-road racing car.

[0019] Figure 2 The utility model is a schematic diagram of the structure of a four-wheel drive system integrated device of a Baja off-road racing car.

[0020] Figure 3 The utility model is a schematic structural diagram of a universal transmission device of a four-wheel drive system of a Baja off-road racing car.

[0021] Figure 4 The utility model is a schematic diagram of the general assembly structure of a four-wheel drive system of a Baja off-road racing car.

[0022] Figure 5 The utility model is a schematic diagram of the sprocket flange structure of a four-wheel drive system of a Baja off-road racing car.

[0023] Figure 6 The utility model is a schematic diagram of the half-axle spline connection of the four-wheel drive system of a Baja off-road racing car.

[0024] Figure 7 The utility model is a schematic diagram of the universal joint structure of a four-wheel drive system of a Baja off-road racing car.

[0025] Figure 8 The utility model is a schematic diagram of the clutch housing structure of a four-wheel drive system of a Baja off-road racing car.

[0026] Fig. 9 The utility model is a schematic diagram of the left and right rear half-axles of the four-wheel drive system of a Baja off-road racing car.

[0027] Marked in the figure are: left front first half shaft 1, clutch assembly 2, clutch housing 2-1, clutch sprocket 2-2, drive chain 3, driven sprocket 4, sprocket flange 5, buffer rubber 5-1, transmission assembly 6, transmission input shaft 6-1, reducer assembly 7, reducer output shaft 7-1, right rear half shaft 8, left rear half shaft 9, transfer case assembly 10, transfer case output shaft 10-1, switching cable 11, switching rod 12, first universal joint 13, transmission shaft 14, second universal joint 15, differential 16, right front half shaft 17, left front second half shaft 18. DETAILED DESCRIPTION

[0028] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0029] First of all, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] like Figures 1 to 9 As shown, a four-wheel drive system of a Baja off-road racing car comprises components including a clutch assembly 2, an integrated device, a universal transmission device and a half shaft. The specific structure and connection relationship of the components are as follows:

[0032] The clutch assembly 2 includes a clutch housing 2-1, a clutch sprocket 2-2 and a drive chain 3, wherein the clutch sprocket 2-2 is connected to the clutch housing 2-1, one end of the drive chain 3 is connected to the clutch sprocket 2-2 through a chain drive, and the other end is connected to the driven sprocket 4;

[0033] The integrated device includes a transmission assembly 6, a reducer assembly 7 and a transfer case assembly 10, wherein one side of the reducer assembly 7 is connected to the transmission assembly 6, and the other side is connected to the transfer case assembly 10; the transmission assembly 6 includes a transmission, a transmission input shaft 6-1, a sprocket flange 5 and a driven sprocket 4, wherein the transmission input shaft 6-1 is connected to the driven sprocket 4 through a spline, and the driven sprocket 4 is connected to the sprocket flange 5 through a bolt; the reducer assembly 7 includes a reducer output shaft 7-1, wherein one end of the reducer output shaft 7-1 is connected to the right rear half shaft 8 through a spline, and the other end is connected to the left rear half shaft 9 through a spline; the transfer case assembly 10 includes a transfer case output shaft 10-1, a switching cable 11 and a switching rod 12, wherein one end of the transfer case output shaft 10-1 is connected to the first universal joint 13 through a flat key, and the other end is fixedly connected to the transfer case, and one end of the switching cable 11 is connected to the transfer case, and the other end is connected to the switching rod 12;

[0034] The universal transmission device includes a first universal joint 13, a transmission shaft 14, a second universal joint 15 and a differential 16, wherein one end of the first universal joint 13 is connected to the transfer case output shaft 10-1 via a flat key, and the other end is connected to the transmission shaft 14, one end of the transmission shaft 14 is connected to the first universal joint 13 via a flat key, and the other end is connected to the second universal joint 15 via a flat key, the second universal joint 15 is connected to the differential 16 via a flat key, one end of 16 is connected to the right front half shaft 17 via a spline, and the other end is connected to the left front second half shaft 18 via a spline;

[0035] The half shafts include a front half shaft and a rear half shaft, the rear half shaft includes a right rear half shaft 8 and a left rear half shaft 9, one end of the right rear half shaft 8 is connected to the reducer output shaft 7-1 through a spline, and the other end is connected to the wheel through a spline, one end of the left rear half shaft 9 is connected to the reducer output shaft 7-1 through a spline, and the other end is connected to the wheel through a spline; the front half shaft includes a right front half shaft 17, a left front second half shaft 18 and a left front first half shaft 1, one end of the right front half shaft 17 is connected to the differential 16 through a spline, and the other end is connected to the wheel through a spline, one end of the left front second half shaft 18 is connected to the differential 16 through a spline, and the other end is connected to the left front first half shaft 1 through a spline, the left front first half shaft 1 is connected to the left front second half shaft 18 through a spline, and the other end is linked to the wheel through a spline.

[0036] The driven sprocket 4 is connected to the sprocket flange 5 by bolts and a buffer rubber 5-1 is embedded therein.

[0037] The keyway of the sprocket flange 5 is a hexagonal spline keyway.

[0038] Working principle and process:

[0039] like Figures 1 to 4As shown, the clutch assembly 2 receives power from the engine and transmits the power to the clutch housing 2-1 by friction; the clutch housing 2-1 is connected to the clutch sprocket 2-2 by a fixed connection, and transmits the power to the clutch sprocket 2-2; the clutch sprocket 2-2 is connected to the drive chain 3, and transmits the power to the driven sprocket 4 through the drive chain 3; the driven sprocket 4 is connected to the sprocket flange 5 by four bolts, and four sprocket flange buffer rubbers 5-1 are added in the middle to absorb the impact generated by the clutch engagement and disengagement, thereby protecting the transmission The sprocket flange 5 is connected to the transmission input shaft 6-1 through six keyways to transmit the power to the transmission assembly 6. At this time, the transmission assembly 6 can change the speed and torque of the engine six times according to the working conditions, so as to obtain higher power. By integrating the transmission assembly 6 with the reducer assembly 7 and the transfer case assembly 10 into an integrated design, it occupies less space, has high transmission efficiency and better power performance, and finally transmits the power to the reducer output shaft 7-1 and the transfer case output shaft 10-1 respectively.

[0040] Rear wheel drive route: The output shaft 7-1 of the reducer is connected to the right rear half shaft 8 and the left rear half shaft 9 through splines, and finally transmits the power to the rear wheels of the racing car;

[0041] Front-wheel drive route: The transfer case assembly 10 is operated by a switching lever 12, which can control the power transmission and interruption between the internal gears of the transfer case assembly 10 and the transfer case output shaft 10-1; the transfer case output shaft 10-1 transmits the power to the first universal joint 13 and transmits it to the second universal joint 15 through the transmission shaft 14 and then to the differential 16. The differential 16 is connected to the right front half shaft 17 through a spline, and is connected to the left front first half shaft 1 through a spline through the left front second half shaft 18, and finally transmits the power to the front wheels of the racing car.

Claims

1. A four-wheel drive system for a Baja off-road racing car, comprising a clutch assembly, an integrated device, a universal transmission device and a half shaft, It is characterized in that The specific structure and connection relationship are as follows: The clutch assembly comprises a clutch housing, a clutch sprocket and a drive chain, wherein the clutch sprocket is connected to the clutch housing, one end of the drive chain is connected to the clutch sprocket through a chain drive, and the other end is connected to the driven sprocket; The integrated device comprises a transmission assembly, a speed reducer assembly and a transfer case assembly, wherein one side of the speed reducer assembly is connected to the transmission assembly, and the other side is connected to the transfer case assembly; the transmission assembly comprises a transmission, a transmission input shaft, a sprocket flange and a driven sprocket, wherein the transmission input shaft is connected to the driven sprocket through a spline, and the driven sprocket is connected to the sprocket flange through a bolt; the speed reducer assembly comprises a speed reducer output shaft, wherein one end of the speed reducer output shaft is connected to the right rear half shaft through a spline, and the other end is connected to the left rear half shaft through a spline; the transfer case assembly comprises a transfer case output shaft, a switching cable and a switching rod, wherein one end of the transfer case output shaft is connected to the first universal joint through a flat key, and the other end is fixedly connected to the transfer case, and one end of the switching cable is connected to the transfer case, and the other end is connected to the switching rod; The universal transmission device comprises a first universal joint, a transmission shaft, a second universal joint and a differential, wherein one end of the first universal joint is connected to the transfer case output shaft through a flat key, and the other end is connected to the transmission shaft, one end of the transmission shaft is connected to the first universal joint through a flat key, and the other end is connected to the second universal joint through a flat key, the second universal joint is connected to the differential through a flat key, one end of the differential is connected to the right front half shaft through a spline, and the other end is connected to the left front second half shaft through a spline; The half shafts include a front half shaft and a rear half shaft, the front half shaft includes a right front half shaft, a left front second half shaft and a left front first half shaft, one end of the right front half shaft is connected to the differential through a spline, and the other end is connected to the wheel through a spline, one end of the left front second half shaft is connected to the differential through a spline, and the other end is connected to the left front first half shaft through a spline, the left front first half shaft is connected to the left front second half shaft through a spline, and the other end is connected to the wheel through a spline; the rear half shaft includes a right rear half shaft and a left rear half shaft, one end of the right rear half shaft is connected to the reducer output shaft through a spline, and the other end is connected to the wheel through a spline, one end of the left rear half shaft is connected to the reducer output shaft through a spline, and the other end is connected to the wheel through a spline.

2. The four-wheel drive system of the Baja off-road racing car according to claim 1, Features: The driven sprocket is embedded with buffer rubber at the connection between the driven sprocket and the sprocket flange through bolts.

3. The four-wheel drive system of the Baja off-road racing car according to claim 1, Features: The keyway of the sprocket flange is a hexagonal spline keyway.

Images