Front and rear drive transfer case assembly

Abstract

The utility model discloses a front and rear drive transfer case assembly which comprises a shell, an input shaft, an input gear, a middle bevel gear, a middle spline shaft, a front drive gear, a front drive output shaft, a sliding gear sleeve and a front drive shifting fork. By arranging the sliding gear sleeve, namely adjusting the installation position of the sliding gear sleeve, flexible switching of the front driving state is achieved, the middle bevel gear and the front driving gear can be kept in a stable meshing rotation state no matter which state the sliding gear sleeve is in subsequently, the lubricating effect can be achieved, the bearing is not prone to being damaged, and the service life of the bearing is prolonged. Meanwhile, due to the arrangement of the input gear, the middle bevel gear, the middle spline shaft, the front driving gear and the front driving output shaft, a two-wheel-drive and four-wheel-drive flexible switching structure can be formed, and the automobile can run under different road conditions.

Description

Technical Field

[0001] This utility model relates to the field of transfer case technology, specifically to a front and rear drive transfer case assembly. Background Technology

[0002] The transfer case plays a crucial role in a vehicle by distributing power. It receives power from the diesel engine, which is then input to the transmission assembly and finally to the transfer case's drive shaft. The transfer case's internal gear transmission system then distributes the power appropriately between the front and rear axles, enabling four-wheel drive functionality. From this perspective, the transfer case is essentially a component of a car. As four-wheel drive technology has evolved, transfer cases have continuously changed, resulting in diverse styles that are tailored to four-wheel drive vehicles with varying requirements. Their basic principles and functions also differ.

[0003] Currently, most transfer cases have a co-center structure for the front and rear output shafts. When arranging the transfer case in a vehicle, the adjustment space is limited, the front and rear axle drive shafts have large angles, which reduces transmission efficiency, power transmission smoothness and the life of the universal drive shaft, and is prone to problems such as abnormal noise from the drive shaft, affecting the overall vehicle performance. Utility Model Content

[0004] The purpose of this utility model is to provide a front and rear drive transfer case assembly to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a front and rear drive transfer case assembly, comprising a housing, characterized in that an input seat is installed on the upper left side of the housing, an input shaft is installed inside the input seat, the right side of the input shaft is connected to an output seat, an input gear is installed outside the input shaft, and a first spacer and a second spacer are respectively installed on both sides of the input gear, an intermediate helical gear is meshed with the lower end of the input gear, the middle part of the intermediate helical gear is connected to an intermediate spline shaft, both sides of the intermediate spline shaft are connected to second deep groove ball bearings, a middle front end cover is installed opposite to the outer end of the second deep groove ball bearing on one side, and a middle rear end cover is installed opposite to the outer end of the second deep groove ball bearing on the other side.

[0006] Preferably, the lower end of the intermediate helical gear meshes with the front drive gear. A needle roller bearing is installed inside the front drive gear. The needle roller bearing is installed at the right end of the front drive output shaft. A sliding tooth sleeve is fitted on the outside of the front drive output shaft. Third deep groove ball bearings are installed on both sides of the front drive output shaft. A front drive end cover is provided opposite to the outside of one side of the third deep groove ball bearing, and a rear drive end cover is provided opposite to the outside of the other side of the third deep groove ball bearing. The lower end of the sliding tooth sleeve is connected to the front drive shift fork. The lower end of the front drive shift fork is connected to the front drive shift fork shaft. The left side of the front drive shift fork shaft is connected to the cylinder, and the right side of the front drive shift fork shaft is connected to the shift fork shaft cover plate.

[0007] Preferably, the input shaft further includes first deep groove ball bearings mating to both sides of the outer end, and the first deep groove ball bearings on both sides are respectively connected to the interior of the input seat and the output seat.

[0008] Preferably, the input seat, output seat, and the outer side of the front drive end cover are all equipped with flanges.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This invention enables a rear-drive configuration via an input shaft, input gear, and intermediate helical gear. A front-drive configuration can be flexibly switched by adjusting the movement of a sliding sleeve connected to the front-drive output shaft. This allows the rear-drive and front-drive positions to be on different axes, resulting in a compact structure, high reliability, convenient gear shifting, and minimal runout of the front and rear axle drive shafts, thus improving overall performance. Furthermore, when the sliding sleeve connects to or disconnects from the front-drive gear, the intermediate helical gear maintains stable meshing and rotation with the front-drive gear, providing lubrication and ensuring continuous bearing rotation and lubrication, preventing damage and extending the transfer case's service life. Attached Figure Description

[0011] Figure 1 This is a front view structural diagram of the present invention;

[0012] Figure 2 This is a side view of the structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0014] In the diagram: Housing-1, Input Seat-2, Input Shaft-3, Output Seat-4, Input Gear-5, First Spacer-6, Second Spacer-7, First Deep Groove Ball Bearing-8, Intermediate Helical Gear-9, Intermediate Spline Shaft-10, Second Deep Groove Ball Bearing-11, Intermediate Front End Cover-12, Intermediate Rear End Cover-13, Front Drive Gear-14, Needle Roller Bearing-15, Front Drive Output Shaft-16, Sliding Gear Sleeve-17, Third Deep Groove Ball Bearing-18, Front Drive End Cover-19, Rear Drive End Cover-20, Front Drive Fork-21, Front Drive Fork Shaft-22, Cylinder-23, Fork Shaft Cover Plate-24. Detailed Implementation

[0015] To further explain the technical solution of this utility model, a detailed description is provided below through specific embodiments.

[0016] Please see Figure 1-3This utility model provides a front and rear drive transfer case assembly, including a housing 1. An input seat 2 is bolted to the upper left side of the housing 1. An input shaft 3 is installed inside the input seat 2. The right side of the input shaft 3 is connected to an output seat 4. An input gear 5 is provided on the outside of the right side of the input shaft 3. A first spacer 6 and a second spacer 7 are respectively installed on the left and right sides of the input gear 5. Both the first spacer 6 and the second spacer 7 are connected to the outside of the input shaft 3. An intermediate helical gear 9 is meshed with the lower end of the input gear 5. The intermediate helical gear 9 is connected to an intermediate spline shaft 10. A second deep groove ball bearing 11 is provided on both the left and right sides of the intermediate spline shaft 10. A middle front end cover 12 is installed opposite to the outer end of the second deep groove ball bearing 11 on the left side, and a middle rear end cover 13 is installed opposite to the outer end of the second deep groove ball bearing 11 on the right side. The middle front end cover 12 and the middle rear end cover 13 are both connected to the outside of the housing 1 by bolts.

[0017] The lower end of the intermediate helical gear 9 meshes with the front drive gear 14. A needle roller bearing 15 is installed inside the front drive gear 14. The needle roller bearing 15 is installed on the outer side of the right end of the front drive output shaft 16. A sliding tooth sleeve 17 is sleeved on the outside of the front drive output shaft 16. A third deep groove ball bearing 18 is installed on both the left and right sides of the front drive output shaft 16. A front drive end cover 19 is provided on the outside of the left third deep groove ball bearing 18, and a rear drive end cover 20 is provided on the outside of the right third deep groove ball bearing 18. The lower end of the sliding tooth sleeve 17 is connected to the front drive shift fork 21. In this way, the sliding tooth sleeve 17 can be quickly connected or separated from the front drive gear 14 by moving the front drive shift fork 21. The lower end of the front drive shift fork 21 is connected to the front drive shift fork shaft 22. The left side of the front drive shift fork shaft 22 is connected to the cylinder 23, and the right side of the front drive shift fork shaft 22 is connected to the shift fork shaft cover plate 24.

[0018] The input shaft 3 also includes first deep groove ball bearings 8 that are mated to both sides of the outer end, and the first deep groove ball bearings 8 on both sides are respectively connected to the inside of the input seat 2 and the output seat 4, so that the input shaft 3 can be in a stable rotational state.

[0019] Flanges are installed on the outer sides of the input seat 2, output seat 4 and front drive end cover 19. The flanges allow for quick connection and combination of the internal shaft and external equipment.

[0020] The working principle is as follows:

[0021] First, when the input shaft 3 is rotated by transmission, it can achieve smooth rotation with the cooperation of the first deep groove ball bearings 8 installed on both sides. In this way, the rear axle connected to the output seat 4 can achieve rear drive movement through the rotation of the input shaft 3.

[0022] Secondly, the input gear 5, installed outside the input shaft 3, can rotate synchronously and mesh with the intermediate helical gear 9 connected at the bottom of the transmission. In this way, the intermediate spline shaft 10 will rotate smoothly in conjunction with the second deep groove ball bearings 11 connected on both sides. The front drive gear 14, installed outside the front drive output shaft 16, can mesh with the rotating intermediate helical gear 9 and rotate accordingly. Thus, the front drive output shaft 16 can correspondingly drive the externally connected front axle to achieve the four-wheel drive state. In this way, the input shaft 3, input gear 5 and intermediate helical gear 9 can form a rear drive state. By adjusting the movement of the sliding gear sleeve 17 connected to the outside of the front drive output shaft 16, the front drive state can be flexibly switched, that is, the rear drive position and the front drive position are not on the same axis. In this way, the structure is compact, the reliability is high, the gear operation is convenient, the yaw angle of the front and rear axle drive shafts of the whole vehicle is small, and the overall performance is improved.

[0023] When the front drive shift fork 21 is moved by the drive cylinder 23, the sliding sleeve 17 connected to the upper end of the front drive shift fork 21 will slide along the outside of the front drive output shaft 16 to connect or disconnect with the front drive gear 14. When the two are combined, the four-wheel drive transmission state can be formed. When the two are separated, the intermediate helical gear 9 and the front drive gear 14 will mesh and transmit power, and the front drive output shaft 16 cannot be driven. In this way, the rear drive state will be formed. The installation position of the sliding sleeve 17 can be adjusted to achieve flexible adjustment of the front drive state. This ensures that no matter what state the sliding sleeve 17 is in, the intermediate helical gear 9 can maintain a stable meshing and rotating state with the front drive gear 14, which can play a lubricating role, making the bearing less prone to damage and improving the service life of the transfer case.

[0024] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A front- and rear-drive transfer case assembly, comprising a housing (1), characterized in that, An input seat (2) is installed on the upper left side of the housing (1). An input shaft (3) is installed inside the input seat (2). The right side of the input shaft (3) is connected to the output seat (4). An input gear (5) is installed outside the input shaft (3). A first spacer (6) and a second spacer (7) are installed on both sides of the input gear (5). An intermediate helical gear (9) is meshed at the lower end of the input gear (5). The middle part of the intermediate helical gear (9) is connected to the intermediate spline shaft (10). Both sides of the intermediate spline shaft (10) are connected to the second deep groove ball bearings (11). A middle front end cover (12) is installed opposite to the outer end of the second deep groove ball bearing (11) on one side, and a middle rear end cover (13) is installed opposite to the outer end of the second deep groove ball bearing (11) on the other side.

2. The front and rear drive transfer case assembly according to claim 1, characterized in that: The lower end of the intermediate helical gear (9) is meshed with the front drive gear (14). The front drive gear (14) is equipped with a needle roller bearing (15). The needle roller bearing (15) is installed on the right end of the front drive output shaft (16). The front drive output shaft (16) is fitted with a sliding tooth sleeve (17). The front drive output shaft (16) is equipped with a third deep groove ball bearing (18) on both sides. The third deep groove ball bearing (18) on one side is provided with a front drive end cover (19) opposite to the outside of the third deep groove ball bearing (18) on the other side is provided with a rear drive end cover (20) opposite to the outside of the third deep groove ball bearing (18). The lower end of the sliding tooth sleeve (17) is connected to the front drive shift fork (21). The lower end of the front drive shift fork (21) is connected to the front drive shift fork shaft (22). The left side of the front drive shift fork shaft (22) is connected to the cylinder (23), and the right side of the front drive shift fork shaft (22) is connected to the shift fork shaft cover plate (24).

3. The front and rear drive transfer case assembly according to claim 2, characterized in that: The input shaft (3) also includes first deep groove ball bearings (8) mating with the outer ends on both sides, and the first deep groove ball bearings (8) on both sides are respectively connected to the inside of the input seat (2) and the output seat (4).

4. The front and rear drive transfer case assembly according to claim 2, characterized in that: Flanges are installed on the outer sides of the input seat (2), output seat (4) and front drive end cover (19).

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