Engine assembly integrated with rear transmission case and all-terrain vehicle

Abstract

The engine assembly comprises an engine and the rear transmission case integrated on an engine case body, the rear transmission case is used for receiving output power of the engine and outputting the power to rear wheels of the vehicle to form driving, the rear transmission case is detachably installed on the rear portion of the engine case body, and the rear transmission case is detachably installed on the rear portion of the engine case body. A rear output shaft of the engine and a power input shaft of the rear transmission case are directly in transmission connection through a middle connecting sleeve, a case body of the engine and the rear transmission case are detachably connected through a flange pair, and the all-terrain vehicle further comprises a heat dissipation ventilation duct arranged on the all-terrain vehicle from front to back. The total length of the power assembly and the rear transmission case of the all-terrain vehicle is reduced, the transmission efficiency is improved and the cost of the whole vehicle is reduced due to the absence of an intermediate transmission shaft, and the heat damage of the engine of the all-terrain vehicle is reduced due to the design of the heat dissipation ventilation duct for heat dissipation of the engine.

Description

TECHNICAL FIELD

[0001] The utility model relates to an automobile part, especially to an all-terrain vehicle part. BACKGROUND

[0002] The existing all-terrain vehicle type adopts a traditional power transmission arrangement mode, that is, an engine and a rear axle gear box are two independent individuals, the engine output needs to be connected with a rear transmission box through an intermediate cross universal transmission shaft or a drum-shaped tooth transmission shaft and transmit power, the structure has a large power transmission length and occupies a large space, which is not conducive to the vehicle arrangement, for the all-terrain vehicle type, because the power assembly is arranged behind the seat and under the vehicle compartment, under the same wheelbase, the engine cylinder head is close to the seat, the engine heat damage has a great influence on the driver or passenger, and because of the intermediate transmission shaft, the transmission efficiency is relatively low and the cost is high.

[0003] Therefore, it is urgent to develop the use of the engine assembly integrated with the rear transmission box on the all-terrain vehicle type, connect the engine rear output end cover and the rear transmission box end cover through the flange structure, drive through the internal and external spline cooperation arranged between the transmission shafts, reduce the total length of the power assembly and the rear transmission box, improve the transmission efficiency and reduce the vehicle cost because of the absence of the intermediate transmission shaft; at the same time, in order to solve the engine heat dissipation, a heat dissipation ventilation channel is designed between the radiator and the engine cylinder head, the wind flowing through the radiator is guided to the engine cylinder head to help the heat dissipation, and the heat damage of the engine is reduced. SUMMARY

[0004] Therefore, it is urgent to develop the use of the engine assembly integrated with the rear transmission box on the all-terrain vehicle type, connect the engine rear output end cover and the rear transmission box end cover through the flange structure, drive through the internal and external spline cooperation arranged between the transmission shafts, reduce the total length of the power assembly and the rear transmission box, improve the transmission efficiency and reduce the vehicle cost because of the absence of the intermediate transmission shaft; at the same time, in order to solve the engine heat dissipation, a heat dissipation ventilation channel is designed between the radiator and the engine cylinder head, the wind flowing through the radiator is guided to the engine cylinder head to help the heat dissipation, and the heat damage of the engine is reduced.

[0005] The engine assembly integrated with the rear transmission box of the utility model, including engine and integrated rear transmission box of engine box, the rear transmission box is used for receiving the output power of the engine and outputting the power to the rear wheel of the vehicle to form the drive.

[0006] Further, the rear transmission box is detachably mounted on the engine box.

[0007] Further, after the rear transmission box is mounted on the engine box, the rear output shaft of the engine and the power input shaft of the rear transmission box are directly connected in transmission through the intermediate connecting sleeve.

[0008] Further, the rear transmission case is mounted at the rear of the engine case body, and the rear output shaft of the engine and the power input shaft of the rear transmission case are connected in straight insertion type through a middle connecting sleeve with splines at both ends.

[0009] Further, the engine case body and the rear transmission case are connected in detachable type through a flange pair.

[0010] Further, the flange pair comprises an engine case body flange and a rear transmission case flange, the engine case body flange is integrally formed with an engine case body flange neck, the engine case body flange neck is inserted into an engine case body flange seat hole of the engine and connected in detachable type, and the rear transmission case flange is integrally formed with a rear transmission case flange neck, the rear transmission case flange neck is inserted into a rear transmission case flange seat hole of the rear transmission case and connected in detachable type.

[0011] Further, a concave-convex connection is formed between the joint surfaces of the engine case body flange and the rear transmission case flange.

[0012] Further, a kind of all-terrain vehicle, the all-terrain vehicle is installed with the engine assembly of the integrated rear transmission case of any of the above.

[0013] Further, it also includes the heat dissipation ventilation channel arranged from front to back in all-terrain vehicle, the heat dissipation ventilation channel includes the air inlet section, ventilation section and air outlet section communicated in sequence from front to back, the air inlet section is equipped with the air inlet gradually expanding to the air inlet direction, and the air outlet section is equipped with the air outlet gradually expanding to the air outlet direction.

[0014] Further, the ventilation section is arranged at the position close to the bottom of all-terrain vehicle, the air inlet section is inclined to front and upward so that the air inlet is located at the front of all-terrain vehicle, and the air outlet section is inclined to rear and upward so that the air outlet is opposite the part needing cooling of engine.

[0015] The beneficial effects of the utility model are as follows: the utility model discloses the integrated rear transmission case's engine assembly is used on all-terrain vehicle type, and the engine rear output end cover of all-terrain vehicle type is connected with the rear transmission case end cover through flange structure, the internal and external spline cooperation transmission of being arranged between transmission shaft reduces the total length of the power assembly and rear transmission case of all-terrain vehicle type, improves transmission efficiency and reduces the whole vehicle cost due to no intermediate transmission shaft, and simultaneously, in order to solve the heat dissipation of the engine of all-terrain vehicle type, the heat dissipation ventilation channel is designed between radiator and engine cylinder head, the wind flowing through radiator is guided to engine cylinder head to help it to dissipate heat, and the heat damage of the engine of all-terrain vehicle type is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further described in connection with the drawings and embodiments:

[0017] Figure 1A partial structure schematic view of the utility model,

[0018] Figure 2 An explosion view of the partial structure of the utility model,

[0019] Figure 3 A schematic view of the appearance structure of the utility model. CONCRETE IMPLEMENTATION

[0020] Figure 1 A partial structure schematic view of the utility model, Figure 2 An explosion view of the partial structure of the utility model, Figure 3 A schematic view of the appearance structure of the utility model, as shown in the figure: including engine 14 and integrated in the engine box rear transmission box 15, the rear transmission box 15 is used to receive the output power of engine 14 and power output to the vehicle rear wheel forms drive, the vehicle contains all the rear wheel vehicle, including all terrain vehicle etc., rear transmission box can directly distribute power to the left rear wheel and right rear wheel.

[0021] In the embodiment, the rear transmission box 15 is detachably mounted on the engine 14 box body; as shown in the figure, the vehicle adopts rear engine 14, and is fixed by bolt installation with rear transmission box 15.

[0022] In the embodiment, the rear transmission box 15 is mounted on the engine box, and the rear output shaft 1 of the engine and the power input shaft 13 of the rear transmission box 15 are directly connected through the intermediate connecting sleeve 2;

[0023] In this embodiment, the rear transmission case 15 is installed at the rear of the engine case, and the rear output shaft 1 of the engine and the power input shaft 13 of the rear transmission case 15 are connected in a straight insertion type through the intermediate connecting sleeve 2 with splines at both ends. As shown in the figure, the intermediate connecting sleeve 2 is located at the inner edge of the flange neck, and the two ends of the intermediate connecting sleeve 2 are connected in transmission through splines with the rear output shaft 1 of the engine and the power input shaft 13 of the rear transmission case respectively. The rear output shaft 1 of the engine 14 and the power input shaft 13 of the rear transmission case 15 are both provided with external splines, and the two ends of the intermediate connecting sleeve 2 are provided with internal splines matched with the external splines. During installation, the power input shaft 13 of the rear transmission case can be directly inserted into the intermediate connecting sleeve 2 to complete the transmission connection, so that the power is output to the rear transmission case 15, which is conducive to improving the overall strength during transmission and the ability to transmit torque, and aligning the axes of the rear output shaft 1 of the engine and the power input shaft 13 of the rear transmission case. The transmission connection can also use other existing technologies, which will not be described here. The intermediate connecting sleeve 2 and the power input shaft 13 of the rear transmission case 15 are connected in rotation through bearings 3 and 12, and locking nuts I 4 and II 9 are respectively arranged at the bearings, which can effectively prevent the intermediate connecting sleeve and the power input shaft 13 of the rear transmission case from moving radially and axially, and ensure the reliability of power transmission.

[0024] In this embodiment, the engine case and the rear transmission case 15 are connected in a detachable manner through the flange pair 6. As shown in the figure, the flange pair 6 adopts a multi-angle flange and is connected in a detachable manner through bolts 8.

[0025] In this embodiment, the flange pair 6 includes an engine case flange and a rear transmission case flange. The engine case flange is integrally formed with an engine case flange neck, which is inserted into an engine case flange seat hole of the engine and connected in a detachable manner. The rear transmission case flange is integrally formed with a rear transmission case flange neck, which is inserted into a rear transmission case flange seat hole of the rear transmission case and connected in a detachable manner. As shown in the figure, bolt holes for fixing the flange to the engine case and the rear transmission case through bolts are also arranged at the flange lugs, and the flange is fixed to the engine case and the rear transmission case through bolts.

[0026] In this embodiment, a concave-convex connection is formed between the joint surfaces of the engine case flange and the rear transmission case flange. As shown in the figure, the joint surfaces of the engine case flange and the rear transmission case flange are also provided with matching round concave-convex structure stops, which are conducive to improving the connection strength and butt joint accuracy of the connection, and improving the sealing performance of the transmission.

[0027] As shown in the figure, the sealing ring 6 is arranged between the joint surface of the engine case flange and the rear transmission case flange, and the oil seal I 5 and the oil seal II 10 are arranged at the bearing of the power input shaft 13 for sealing the bearing, and the bushing 11 matched with the power input shaft is arranged at the power input shaft 13 of the rear transmission case, and the bushing 11 and the oil seal III 10 jointly complete the sealing, thereby improving the overall sealing performance of the joint.

[0028] The utility model also provides a kind of all terrain vehicle, the all terrain vehicle is installed with the integrated rear transmission case's engine assembly as above.

[0029] In the embodiment, the heat dissipation ventilation channel 17 arranged from front to back on the all terrain vehicle is also included, and the heat dissipation ventilation channel 17 includes air inlet section, ventilation section and air outlet section sequentially communicated from front to back, the air inlet section is provided with air inlet gradually expanding to air inlet direction, and the air outlet section is provided with air outlet gradually expanding to air outlet direction.

[0030] In the embodiment, the ventilation section is arranged at the position close to the bottom of the all terrain vehicle, the air inlet section is inclined to front and upper direction so that the air inlet is located at the front part of the all terrain vehicle, and the air outlet section is inclined to rear and upper direction so that the air outlet is directly opposite to the part of engine needing to be cooled;As shown in the figure, the air inlet of the heat dissipation ventilation channel 17 is connected with the radiator 16 arranged on the windward surface of the vehicle, and the air inlet gradually expanding to air inlet direction is conducive to guiding air into the heat dissipation ventilation channel 17, the ventilation section of the heat dissipation ventilation channel 17 is located at the bottom plate of cab and the convex space in the middle part of cab, the air flowing through the radiator 16 is guided to the rear end of the vehicle, the air outlet section is provided with air outlet gradually expanding to air outlet direction, and the air outlet is directly opposite to the cylinder head position of engine, which helps to cool the cylinder head of engine and improve the reliability of engine, and the air flowing through the cylinder head of engine continues to be discharged to the right side of vehicle (exhaust pipe side), continues to cool the exhaust pipe 18 and dissipate heat, and finally discharged from the rear part of vehicle.

[0031] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model and not to limit, although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the utility model, and all of them should be covered in the claim scope of the utility model.

Claims

1. An engine assembly incorporating a rear transmission case, characterised in that: The engine and the integrated rear transmission case are arranged in the engine box, the rear transmission case is used to receive the output power of the engine and output the power to the rear wheels of the vehicle to form the drive, and the rear transmission case is detachably mounted on the engine box.

2. The integrated rear-transaxle engine assembly of claim 1, wherein: The rear transmission case is mounted on the rear of the engine box, the rear output shaft of the engine and the power input shaft of the rear transmission case are directly connected through the intermediate connecting sleeve.

3. The integrated rear-transaxle engine assembly of claim 2, wherein: The rear transmission case is mounted on the rear of the engine box, the rear output shaft of the engine and the power input shaft of the rear transmission case are directly connected through the intermediate connecting sleeve.

4. The integrated rear-transaxle engine assembly of claim 1, wherein: The engine box and the rear transmission case are connected through the flange pair.

5. The integrated rear-transaxle engine assembly of claim 4, wherein: The flange pair includes the engine box flange and the rear transmission case flange, the engine box flange is integrally formed with the engine box flange neck, the engine box flange neck is inserted into the engine box flange seat hole of the engine, and the detachable connection is formed; the rear transmission case flange is integrally formed with the rear transmission case flange neck, and the rear transmission case flange neck is inserted into the rear transmission case flange seat hole of the rear transmission case, and the detachable connection is formed.

6. The integrated rear-transaxle engine assembly of claim 4, wherein: The combination surface of the engine box flange and the rear transmission case flange forms the concave-convex connection.

7. An all-terrain vehicle characterized by: The all-terrain vehicle is provided with the integrated rear transmission case engine assembly of any one of claims 1-6.

8. The ATV of claim 7, characterized by: The all-terrain vehicle is provided with the integrated rear transmission case engine assembly of any one of claims 1-6.

9. The ATV of claim 8, characterized in that: The all-terrain vehicle is provided with the integrated rear transmission case engine assembly of any one of claims 1-6. The all-terrain vehicle is provided with the integrated rear transmission case engine assembly of any one of claims 1-6.

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