Four-wheel drive chassis structure

Abstract

The utility model provides a four wheel drive chassis structure, including frame, set up front drive axle and rear drive axle on the frame still including setting up transmission, the rear transmission axle of connection setting between transmission and the input end of speed reducer in rear drive axle, the front transmission axle of connection setting between transmission and the input end of speed reducer in front drive axle, the steering gear connected with front drive axle, transmission's output shaft both ends are connected with front drive axle and rear drive axle respectively, and transmission's input end is connected with drive motor. The four wheel drive chassis structure provided by the utility model rotates the output shaft of transmission through drive motor, and the structure is compact and the output torque is higher, through the meshing sleeve one in gear three and the meshing sleeve two in gear four are slid to respectively to gear, realize the drive to the front wheel in front drive axle and the rear wheel in rear drive axle, and transmission's transmission efficiency is higher, satisfies the demand of high torque output scene such as agricultural machinery and engineering vehicle.

Description

Technical Field

[0001] This utility model relates to the field of vehicle chassis technology, specifically to a four-wheel drive chassis structure. Background Technology

[0002] The chassis of a four-wheel drive vehicle refers to the structural components that support the vehicle body and transmission system at the bottom, directly affecting the vehicle's handling, stability, and performance. The chassis is a crucial part of a four-wheel drive vehicle, primarily comprising the following components: Transmission system: Responsible for transmitting engine power to all four wheels, ensuring each wheel receives driving force. Suspension system: Supports the body, absorbs road vibrations, and ensures vehicle stability and comfort. Braking system: Controls vehicle deceleration and stopping. Steering system: Controls the vehicle's direction of travel. Traditional four-wheel drive chassis structures generally use an internal combustion engine as the power source, distributing power between the front and rear axles through a transfer case. Based on structural differences, they are classified into part-time four-wheel drive, full-time four-wheel drive, on-demand four-wheel drive, and super selective four-wheel drive, among others.

[0003] However, existing four-wheel drive chassis structures rely on multi-stage gear transmissions, which are relatively complex and have low transmission efficiency, making it difficult to meet the needs of high torque output scenarios such as agricultural machinery and engineering vehicles. This solution addresses this technical problem. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a transmission whose output shaft is driven by a drive motor. It features a compact structure and high output torque. By sliding the sliding gears into the meshing sleeve one of gear three and the meshing sleeve two of gear four, the front wheels of the front drive axle and the rear wheels of the rear drive axle are driven. The transmission has a simple structure and high transmission efficiency, meeting the needs of high torque output scenarios such as agricultural machinery and engineering vehicles.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a four-wheel drive chassis structure, including a frame, a front drive axle and a rear drive axle mounted on the frame, a transmission mounted on the frame, a rear drive shaft connecting the transmission and the input end of the reducer in the rear drive axle, a front drive shaft connecting the transmission and the input end of the reducer in the front drive axle, and a steering gear connected to the front drive axle. The two ends of the output shaft of the transmission are respectively connected to the front drive axle and the rear drive axle. A drive motor is connected to the input end of the transmission, and a steering wheel is connected to the steering gear.

[0006] The transmission includes a housing mounted on the vehicle frame, a connecting shaft rotatably mounted within the housing, a first gear and a second gear fixedly mounted on the connecting shaft, an input gear meshing with the first gear, a sliding gear slidably mounted on the output shaft, and a third gear and a fourth gear rotatably mounted on the output shaft. The third gear meshes with the first gear, and the fourth gear meshes with the second gear. The inner side of the third gear is provided with a first meshing sleeve that can be separably meshed with the sliding gear, and the inner side of the fourth gear is provided with a second meshing sleeve that can be separably meshed with the sliding gear. The drive motor is connected to the input gear, and a shift fork for driving the sliding gear to slide is provided within the housing. The shift fork is connected to a shift lever via a shift fork shaft.

[0007] The transmission ratio between gear two and gear four is greater than the transmission ratio between gear one and gear three.

[0008] The front drive axle has a hinge seat 1 at both ends of the axle housing, and a hinge seat 2 is hinged on the hinge seat 1. The half shaft of the front drive axle passes through the hinge seat 1 and the hinge seat 2 in sequence and is connected to the wheel hub. A half shaft ball cage is provided on the half shaft between the hinge seat 1 and the hinge seat 2.

[0009] The side of the second hinge seat is provided with a connecting arm, and the two connecting arms are respectively hinged to the tie rod of the steering gear.

[0010] A universal joint is provided between the front drive shaft and the output end of the reducer in the front drive axle.

[0011] A universal joint is provided between the rear drive shaft and the output end of the reducer in the rear drive axle.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) The output shaft of the transmission is driven by the drive motor to rotate. The structure is compact and the output torque is high. By sliding the sliding gear into the meshing sleeve one of gear three and the meshing sleeve two of gear four respectively, the front wheel in the front drive axle and the rear wheel in the rear drive axle are driven. The transmission has a simple structure, high transmission efficiency, and low power loss, which meets the needs of high torque output scenarios such as agricultural machinery and engineering vehicles.

[0014] (2) The drive motor is directly connected to the input shaft of the transmission, eliminating the need for a hydraulic torque converter in the traditional transmission system. The stepless speed regulation range is better than that of the fuel engine, avoiding the defect of easy stalling of the fuel engine at low speed, and the drive stability is better.

[0015] (3) When the steering wheel is turned, the connection between the steering gear tie rod and the connecting arm drives the second articulated seat to swing along the first articulated seat on the front drive axle. The half-shaft of the front drive axle is equipped with a half-shaft ball cage, thus realizing the synchronous steering of the front wheels. The steering structure is simple, stable and reliable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the front drive axle of this utility model;

[0018] Figure 3 This is a schematic diagram of the connecting arm of this utility model;

[0019] Figure 4 This is an exploded view of the structure of the transmission of this utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of the sliding gear of this utility model.

[0021] In the diagram: 1. Frame; 2. Front drive axle; 21. Articulation seat one; 22. Articulation seat two; 23. Half-shaft CV joint; 24. Connecting arm; 3. Rear drive axle; 4. Transmission; 41. Housing; 42. Connecting shaft; 43. Gear one; 44. Gear two; 45. Input gear; 46. Output shaft; 47. Gear three; 471. Engagement sleeve one; 48. Gear four; 481. Engagement sleeve two; 49. Sliding gear; 5. Rear drive shaft; 51. Universal joint two; 6. Front drive shaft; 61. Universal joint one; 7. Steering gear; 71. Tie rod; 8. Drive motor; 9. Steering wheel. Detailed Implementation

[0022] To more clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0023] See Figures 1-5 A four-wheel drive chassis structure includes a frame 1, a front drive axle 2 and a rear drive axle 3 mounted on the frame 1, a transmission 4 mounted on the frame 1, a rear drive shaft 5 connecting the input end of the reducer in the transmission 4 and the rear drive axle 3, a front drive shaft 6 connecting the transmission 4 and the input end of the reducer in the front drive axle 2, and a steering gear 7 connected to the front drive axle 2. The output shaft 46 of the transmission 4 is connected to the front drive axle 2 and the rear drive axle 3 at both ends, and a drive motor 8 is connected to the input end of the transmission 4. A steering wheel 9 is connected to the steering gear 7.

[0024] The transmission 4 includes a housing 41 mounted on the frame 1, a connecting shaft 42 rotatably mounted inside the housing 41, a first gear 43 and a second gear 44 fixedly mounted on the connecting shaft 42, an input gear 45 meshing with the first gear 43, a sliding gear 49 slidably mounted on the output shaft 46, and a third gear 47 and a fourth gear 48 rotatably mounted on the output shaft 46 respectively. The third gear 47 meshes with the first gear 43, and the fourth gear 48 meshes with the second gear 44. The inner side of the third gear 47 is provided with a first meshing sleeve 471 that can be separably meshed with the sliding gear 49, and the inner side of the fourth gear 48 is provided with a second meshing sleeve 481 that can be separably meshed with the sliding gear 49. The drive motor 8 is connected to the input gear 45. The housing 41 is provided with a shift fork for driving the sliding gear 49 to slide. The shift fork is connected to a shift lever via a shift fork shaft (the shift fork, shift fork shaft, and shift lever all use existing technology to achieve the sliding of the sliding gear 49, which is not shown in the attached drawings and will not be described in detail here).

[0025] Specifically, a groove is provided on the side of the output shaft 46, and a sliding gear 49 is slidably disposed in the groove. The sliding gear 49 can be separably engaged with the teeth in the first engagement sleeve 471 and the second engagement sleeve 481.

[0026] The transmission ratio between gear 2 (44) and gear 4 (48) is greater than the transmission ratio between gear 1 (43) and gear 3 (47).

[0027] The front drive axle 2 has a hinge seat 21 at both ends of the axle housing, and a hinge seat 22 is hinged on the hinge seat 21. The half shaft of the front drive axle 2 passes through the hinge seat 21 and the hinge seat 22 in sequence and is connected to the wheel hub. A half shaft ball cage 23 is provided on the half shaft between the hinge seat 21 and the hinge seat 22.

[0028] The side of the hinge seat 22 is provided with a connecting arm 24, and the two connecting arms 24 are respectively hinged to the tie rod 71 of the steering gear 7.

[0029] A universal joint 61 is provided between the front drive shaft 6 and the output end of the reducer in the front drive axle 2.

[0030] A universal joint 51 is provided between the rear drive shaft 5 and the output end of the reducer in the rear drive axle 3.

[0031] The specific working process of this utility model:

[0032] When in use, start the drive motor 8. The drive motor 8 drives the input gear 45 to rotate. The input gear 45 drives the gear 44 to rotate through the connecting shaft 42 via the gear 1 43. The gear 1 43 drives the gear 3 47 to rotate along the output shaft 46. At the same time, the gear 2 44 drives the gear 48 to rotate along the output shaft 46.

[0033] At this time, the sliding gear 49 is between gear 3 47 and gear 48, and the transmission 4 is in neutral. When the shift lever is operated, the shift lever drives the shift fork to move through the shift fork shaft. The shift fork drives the sliding gear 49 to slide along the output shaft 46. When the sliding gear 49 slides into the meshing sleeve 2 481 inside gear 48, gear 48 drives the sliding gear 49 to rotate. The sliding gear 49 drives the output shaft 46 to rotate. Since the transmission ratio between gear 2 44 and gear 48 is greater than the transmission ratio between gear 1 43 and gear 3 47, the transmission ratio is large at this time. The output shaft 46 is in a low gear with high torque. Power is output to the front drive axle 2 and the rear drive axle 3 through the front drive shaft 6 and the rear drive shaft 5 connected to the output shaft 46, respectively, and the vehicle starts. When the shift operation is performed until the sliding gear 49 slides into the meshing sleeve 1 471 of gear 3 47, the output shaft 46 is in a high gear with low torque, and the vehicle accelerates.

[0034] Rotate the steering wheel 9. The steering wheel 9 drives the second hinge seat 22 to rotate along the first hinge seat 21 through the tie rod 71 of the steering gear 7. Thus, under the action of the ball cage 23 on the upper half shaft, the front wheels steer.

[0035] The output shaft 46 of the transmission 4 is driven by the drive motor 8. The transmission 4 has a compact structure and high output torque. By sliding the sliding gear 49 into the meshing sleeve 471 of gear 3 47 and the meshing sleeve 481 of gear 48 respectively, the front wheels of the front drive axle 2 and the rear wheels of the rear drive axle 3 are driven. The transmission 4 has a simple structure, high transmission efficiency, and low power loss, which meets the needs of high torque output scenarios such as agricultural machinery and engineering vehicles.

[0036] Driven by directly connecting the drive motor 8 to the input shaft of the transmission 4, it eliminates the need for a hydraulic torque converter in the traditional transmission system. The stepless speed regulation range is better than that of an internal combustion engine, avoiding the defect of easy stalling of internal combustion engines at low speeds, and the drive stability is better.

[0037] When the steering wheel 9 is turned, the connection between the tie rod 71 of the steering gear 7 and the connecting arm 24 causes the second hinge seat 22 to swing along the first hinge seat 21 on the front drive axle 2. The half-shaft of the front drive axle 2 is equipped with a half-shaft ball cage 23, thereby realizing the synchronous steering of the front wheels. The steering structure is simple, stable and reliable, and the steering angle is larger.

[0038] By setting up the half-shaft ball cage 23, universal joint one 61 and universal joint two 51, the torsional load of the transmission system is eliminated, and the transmission efficiency is further improved.

[0039] The drive motor 8 in this solution includes, but is not limited to, electric motors, hydraulic motors, pneumatic motors, and other drive types. Any drive method that enables the operation of the transmission 4 in this solution is within the protection scope of this solution.

[0040] The technical features of this utility model not described can be implemented by or by using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this utility model, and this utility model is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A four-wheel drive chassis structure, comprising a frame (1), a front drive axle (2) and a rear drive axle (3) mounted on the frame (1), characterized in that, It also includes a transmission (4) mounted on the frame (1), a rear drive shaft (5) connecting the transmission (4) and the input end of the reducer in the rear drive axle (3), a front drive shaft (6) connecting the transmission (4) and the input end of the reducer in the front drive axle (2), and a steering gear (7) connected to the front drive axle (2). The output shaft (46) of the transmission (4) is connected to the front drive axle (2) and the rear drive axle (3) at both ends, and a drive motor (8) is connected to the input end of the transmission (4). The steering gear (7) is connected to a steering wheel (9). The transmission (4) includes a housing (41) mounted on the frame (1), a connecting shaft (42) rotatably mounted inside the housing (41), a gear 1 (43) and a gear 2 (44) fixedly mounted on the connecting shaft (42), an input gear (45) meshing with the gear 1 (43), a sliding gear (49) slidably mounted on the output shaft (46), and a gear 3 (47) and a gear 4 (48) rotatably mounted on the output shaft (46), wherein the gear 3 (47) meshes with the gear 1 (43) and the gear 49. 3) Engagement: Gear 4 (48) engages with Gear 2 (44). Gear 3 (47) has a meshing sleeve 1 (471) that can be separably meshed with the sliding gear (49) on its inner side. Gear 4 (48) has a meshing sleeve 2 (481) that can be separably meshed with the sliding gear (49) on its inner side. The drive motor (8) is connected to the input gear (45). The housing (41) has a shift fork for driving the sliding gear (49) to slide. The shift fork is connected to a shift lever through a shift fork shaft.

2. The four-wheel drive chassis structure according to claim 1, characterized in that, The transmission ratio between gear two (44) and gear four (48) is greater than the transmission ratio between gear one (43) and gear three (47).

3. The four-wheel drive chassis structure according to claim 2, characterized in that, The front drive axle (2) has a hinge seat 1 (21) at both ends of the axle housing, and a hinge seat 2 (22) is hinged on the hinge seat 1 (21). The half shaft of the front drive axle (2) passes through the hinge seat 1 (21) and the hinge seat 2 (22) in sequence and is connected to a wheel hub. A half shaft ball cage (23) is provided on the half shaft between the hinge seat 1 (21) and the hinge seat 2 (22). The side of the hinge seat 2 (22) is provided with a connecting arm (24), and the two connecting arms (24) are respectively hinged to the pull rod (71) of the steering gear (7).

4. The four-wheel drive chassis structure according to claim 3, characterized in that, A universal joint (61) is provided between the front drive shaft (6) and the output end of the reducer in the front drive axle (2).

5. The four-wheel drive chassis structure according to claim 4, characterized in that, A universal joint 2 (51) is provided between the rear drive shaft (5) and the reducer output end of the rear drive axle (3).

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