Novel rear axle with four-wheel drive structure

Abstract

The utility model discloses a novel rear axle with a four-wheel drive structure, and relates to the field of vehicle parts. The novel rear axle of the four-wheel-drive structure comprises a rear axle body, a rear transmission box is detachably installed on the rear axle body, a transmission, a main speed reducer and a differential mechanism which are in transmission connection are arranged in the rear transmission box, a left half shaft and a right half shaft are installed on the portions, located on the two sides of the rear transmission box, in the rear axle body respectively, and the inner end of the left half shaft and the inner end of the right half shaft are connected with the differential mechanism. The outer ends of the left half axle and the right half axle extend out of the rear axle body and are connected with wheels on the two sides respectively. According to the novel four-wheel-drive structure rear axle, the power output structure of the transmission box body is simplified, and the cost and the assembly complexity are reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle components, and in particular to a novel four-wheel drive rear axle. Background Technology

[0002] Four-wheel drive, or four-wheel drive system, is a power transmission system that enables all four wheels of a vehicle to receive driving force. It distributes engine torque in different proportions to all wheels depending on road conditions, thereby improving the vehicle's driving capability. Current four-wheel drive systems typically have transmission housings mounted on the front and rear axles. The differential within the transmission housing transmits power to the left and right wheels via CV joints on either side. The CV joint is a constant velocity joint structure consisting of an inner CV joint, an outer CV joint, and a middle CV joint. The inner CV joint is connected to the differential, and the outer CV joint is connected to the wheels. Power is transmitted from the differential through the inner CV joint to the middle CV joint, and then through the outer CV joint to the wheels. However, the CV joint structure is complex and has high manufacturing costs. Furthermore, the assembly of the CV joint requires precise alignment and multiple docking operations. Accurate installation and adjustment of the connection between the middle CV joint and the differential and wheels, as well as the angle and clearance of the CV joints, increase assembly time and complexity. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a new type of four-wheel drive rear axle, which simplifies the power output structure of the transmission box and reduces cost and assembly complexity.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A novel four-wheel drive rear axle includes a rear axle body, on which a rear transmission box is detachably mounted. The rear transmission box contains a transmission, a final reducer, and a differential connected in a transmission connection. A left half-shaft and a right half-shaft are respectively mounted on both sides of the rear transmission box within the rear axle body. The inner ends of the left and right half-shafts are connected to the differential, and the outer ends of the left and right half-shafts extend to the outside of the rear axle body and are respectively connected to the wheels on both sides.

[0006] In some embodiments, the differential includes a differential housing, half-shaft gears disposed on the left and right sides inside the differential housing, and meshing gears disposed on the front and rear sides inside the differential housing and meshing with the half-shaft gears. The two ends of the differential housing are rotatably connected to the rear transmission case through a first bearing. The half-shaft gears are provided with internal splines. The left half-shaft and the right half-shaft are rotatably connected to the rear axle body through a second bearing and a third bearing, respectively. The inner ends of the left half-shaft and the right half-shaft are respectively provided with external splines that mesh with the internal splines of the left and right half-shaft gears.

[0007] In some embodiments, the main reducer includes a main reducer drive gear and a main reducer driven gear. The main reducer drive gear is coaxially fixed on the power output shaft of the transmission, and the main reducer driven gear is coaxially fixed on the differential housing and meshes with the main reducer drive gear.

[0008] In some embodiments, the output end of the power output shaft of the transmission is coaxially connected to a driving bevel gear, a driven bevel gear meshes with the driving bevel gear, and a drive shaft is coaxially connected to the driven bevel gear. The drive shaft is used for transmission connection with the front transmission case mounted on the front axle.

[0009] In some embodiments, brake discs are installed at the outer ends of both the left and right half-shafts, and brake caliper assemblies that cooperate with the brake discs are installed at both ends of the rear axle body.

[0010] In some embodiments, the rear axle body is further provided with a first mounting bracket and a second mounting bracket, which are located on both sides of the rear transmission box.

[0011] Compared with the prior art, this utility model achieves at least the following beneficial effects:

[0012] Power is transmitted to the final drive via the transmission, then distributed to the left and right half-shafts via the differential, and finally transmitted to the wheels. It adopts a bridge-type output structure, with the inner ends of the left and right half-shafts directly connected to the differential and the outer ends directly connected to the wheels. The rear transmission box is rigidly connected to the rear axle body to form a whole. Compared with the ball joint half-shaft output structure used in the existing four-wheel drive structure rear axle, it reduces the number of parts, simplifies the power output structure of the transmission box, simplifies the vehicle chassis structure, reduces costs, and eliminates the need for precise installation and adjustment of the ball joint angle and clearance, reducing assembly complexity and assembly time. Attached Figure Description

[0013] One or more embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the application;

[0015] Figure 2 This is an exploded structural diagram of an embodiment of this application;

[0016] Figure 3 This is an exploded structural diagram from another perspective of an embodiment of this application;

[0017] Figure 4 This is an exploded view of the differential in an embodiment of this application.

[0018] The following are the labels in the diagram: 1. Rear axle body; 2. Rear transmission box; 3. Gearbox; 31. Power input shaft; 32. Intermediate shaft; 33. Power output shaft; 4. Main reducer; 41. Main reducer drive gear; 42. Main reducer driven gear; 5. Differential; 51. Differential housing; 52. Half-shaft gear; 53. Meshing gear; 6. Left half-shaft; 7. Right half-shaft; 8. First bearing; 9. Internal spline; 10. External spline; 20. Drive bevel gear; 30. Driven bevel gear; 40. Drive shaft; 50. Brake disc; 60. Brake caliper assembly; 70. First mounting bracket; 80. Second mounting bracket. Detailed Implementation

[0019] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of this application more complete and to fully convey the concept of the present application to those skilled in the art.

[0020] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] like Figures 1-4 As shown in the embodiment of this application, a novel four-wheel drive rear axle includes a rear axle body 1, on which a rear transmission box 2 is detachably mounted. Specifically, the rear transmission box 2 is fixedly connected to the rear axle body 1 by bolts. The rear transmission box 2 contains a transmission 3, a final reducer 4, and a differential 5 for transmission connection. A left half-shaft 6 and a right half-shaft 7 are respectively mounted on both sides of the rear transmission box 2 inside the rear axle body 1. The inner ends of the left half-shaft 6 and the right half-shaft 7 are connected to the differential 5, and the outer ends of the left half-shaft 6 and the right half-shaft 7 extend to the outside of the rear axle body 1 and are respectively connected to the wheels on both sides.

[0022] The differential 5 includes a differential housing 51, half-shaft gears 52 located on the left and right sides inside the differential housing 51, and meshing gears 53 located on the front and rear sides inside the differential housing 51 and meshing with the half-shaft gears 52. The two ends of the differential housing 51 are rotatably connected to the rear transmission box 2 through the first bearing 8. The half-shaft gears 52 are provided with internal splines 9. The left half-shaft 6 and the right half-shaft 7 are rotatably connected to the rear axle body 1 through the second bearing and the third bearing, respectively. The inner ends of the left half-shaft 6 and the right half-shaft 7 are respectively provided with external splines 10 that mesh with the internal splines 9 of the left and right half-shaft gears 52.

[0023] The transmission 3 includes a power input shaft 31, an intermediate shaft 32, and a power output shaft 33 connected by gear transmission. The structure of the transmission 3 is existing technology and will not be described in detail here. The main reducer 4 includes a main reducer drive gear 41 and a main reducer driven gear 42. The main reducer drive gear 41 is coaxially fixed on the power output shaft 33 of the transmission 3, and the main reducer driven gear 42 is coaxially fixed on the differential housing 51 and meshes with the main reducer drive gear 41.

[0024] The output end of the power output shaft 33 of the transmission 3 is coaxially connected to the drive bevel gear 20, the drive bevel gear 20 is meshed with the driven bevel gear 30, and the driven bevel gear 30 is coaxially connected to the drive shaft 40. The drive shaft 40 is used to drive the transmission to the front transmission box mounted on the front axle, thereby transmitting the power output to the front transmission box of the front axle.

[0025] The working principle of this new four-wheel drive rear axle is as follows: power is transmitted to the main reducer 4 through the transmission 3, then distributed to the left half-shaft 6 and the right half-shaft 7 through the differential 5, and finally transmitted to the wheels. It adopts a bridge-type output structure. The inner ends of the left half-shaft 6 and the right half-shaft 7 are directly connected to the differential 5, and the outer ends are directly connected to the wheels. The rear transmission box 2 is rigidly connected to the rear axle body 1 to form a whole. Compared with the ball joint half-shaft output structure used in the existing four-wheel drive rear axle, it reduces the number of parts, simplifies the power output structure of the transmission box, simplifies the vehicle chassis structure, reduces costs, and eliminates the need for precise installation and adjustment of the ball joint angle and clearance, thus reducing assembly complexity and assembly time.

[0026] Optionally, brake discs 50 are mounted on the outer ends of both the left half-shaft 6 and the right half-shaft 7, and brake caliper assemblies 60 that mate with the brake discs 50 are mounted on both ends of the rear axle body 1. The brake caliper assembly includes a caliper body and brake pads. When the brake caliper assembly is in operation, the caliper body presses the brake pads against the brake disc 50, thereby forcing the wheels to decelerate.

[0027] Optionally, the rear axle body 1 is also provided with a first mounting bracket 70 and a second mounting bracket 80. The first mounting bracket 70 and the second mounting bracket 80 are located on both sides of the rear transmission box 2 and are used to connect with the vehicle frame, which can make the rear axle mounting structure more stable.

[0028] It should be understood that all the above embodiments are exemplary and not restrictive. Any modifications, equivalent changes and alterations made by those skilled in the art to the specific embodiments described above under the concept of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A novel four-wheel drive rear axle, comprising a rear axle body, characterized in that: A rear transmission box is detachably mounted on the rear axle body. The rear transmission box contains a transmission, a final drive, and a differential that are connected in transmission. A left half-shaft and a right half-shaft are respectively mounted on both sides of the rear transmission box inside the rear axle body. The inner ends of the left half-shaft and the right half-shaft are connected to the differential, and the outer ends of the left half-shaft and the right half-shaft extend to the outside of the rear axle body and are respectively connected to the wheels on both sides.

2. The novel four-wheel drive rear axle according to claim 1, characterized in that: The differential includes a differential housing, half-shaft gears located on the left and right sides inside the differential housing, and meshing gears located on the front and rear sides inside the differential housing and meshing with the half-shaft gears. The two ends of the differential housing are rotatably connected to the rear transmission case via a first bearing. The half-shaft gears are provided with internal splines. The left and right half-shafts are rotatably connected to the rear axle body via a second and a third bearing, respectively. The inner ends of the left and right half-shafts are respectively provided with external splines that mesh with the internal splines of the left and right half-shaft gears.

3. The novel four-wheel drive rear axle according to claim 2, characterized in that: The main reducer includes a main reducer drive gear and a main reducer driven gear. The main reducer drive gear is coaxially fixed on the power output shaft of the transmission, and the main reducer driven gear is coaxially fixed on the differential housing and meshes with the main reducer drive gear.

4. The novel four-wheel drive rear axle according to claim 1, characterized in that: The output end of the power output shaft of the transmission is coaxially connected to a driving bevel gear, a driven bevel gear meshes with the driving bevel gear, and a drive shaft is coaxially connected to the driven bevel gear. The drive shaft is used for transmission connection with the front transmission box mounted on the front axle.

5. The novel four-wheel drive rear axle according to claim 1, characterized in that: Brake discs are installed at the outer ends of both the left and right half-shafts, and brake caliper assemblies that cooperate with the brake discs are installed at both ends of the rear axle body.

6. The novel four-wheel drive rear axle according to claim 1, characterized in that: The rear axle body is also provided with a first mounting bracket and a second mounting bracket, which are located on both sides of the rear transmission box.

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