Chain type high ground clearance four-wheel drive chassis

Abstract

A chain-driven high ground clearance four-wheel drive chassis uses a motor to drive one axle on one side of the frame, which in turn drives another axle on the same side via a chain drive between the two axles, thus achieving four-wheel drive. An upper tension sprocket and two lower tension sprockets are added. The upper tension sprocket causes the upper half of the drive chain to extend upwards from the top of the sprocket, while the two lower tension sprockets cause the lower half of the drive chain to extend upwards from the bottom of the sprocket. This results in the entire drive chain shifting upwards after leaving the axle, increasing the distance between the drive chain and the ground, and thus improving ground clearance. Compared to existing four-wheel drive chassis, this chassis achieves high ground clearance much more conveniently. Furthermore, when ground clearance needs adjustment, only different sized drive sprockets need to be replaced, and the installation height or size of the tension sprockets needs to be adjusted. This allows for very convenient adjustment of the maximum ground clearance of the four-wheel drive chassis, improving adaptability and economy.

Description

Technical Field

[0001] This utility model relates to the field of four-wheel drive chassis for agricultural machinery, and in particular to a chain-type high ground clearance four-wheel drive chassis. Background Technology

[0002] With the rapid development of electronic control technology, the application of electronically controlled four-wheel drive chassis is becoming increasingly widespread, especially in the field of agricultural robots, where the demand is even more urgent. Agricultural robots, due to their very limited working area, require chassis with the smallest possible turning radius. Currently, agricultural robots generally adopt a miniaturized version of traditional wheeled mechanical four-wheel drive, hydraulic four-wheel drive, wheeled four-wheel drive, or tracked chassis. However, these existing four-wheel drive chassis have large turning radii. For example, wheeled mechanical four-wheel drive and hydraulic four-wheel drive chassis are expensive, as are wheeled hydraulic four-wheel drive, wheeled four-wheel drive, and tracked four-wheel drive chassis. Furthermore, when higher ground clearance is required, existing four-wheel drive chassis need to be modified through complex structures, resulting in high costs and reducing the adaptability and economy of agricultural robots. Utility Model Content

[0003] The purpose of this invention is to provide a chain-driven high ground clearance four-wheel drive chassis that can easily achieve and adjust high ground clearance.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a chain-type high ground clearance four-wheel drive chassis, including a frame and four wheels. The axles of the four wheels are respectively connected to the frame. The left and right sides of the frame are respectively provided with chain drive assemblies for driving the two left wheels and the two right wheels. The chain drive assembly includes a motor mounted on the frame. The output shaft of the motor is equipped with a drive sprocket. The four axles are respectively equipped with transmission sprockets. The drive sprocket and one of the transmission sprockets located on the same side of the frame are equipped with a drive chain. The two transmission sprockets located on the same side of the frame are equipped with transmission chains, so that the drive sprocket can drive the two transmission sprockets on the same side to rotate. Each chain drive assembly also includes an upper tension sprocket and two lower tension sprockets. The upper tension sprocket is located at the middle of the drive chain along its length. The two lower tension sprockets are close to the two wheels respectively, and are located between the drive sprocket and the upper tension sprocket along the length of the drive chain. The top side of the upper tension sprocket is higher than the top side of the drive sprocket, and the top side of the lower tension sprocket is higher than the bottom side of the drive sprocket. The upper tension sprocket causes the upper half of the drive chain to extend upward from the top side of the drive sprocket, and the two lower tension sprockets work together to cause the lower half of the drive chain to extend upward from the bottom side of the drive sprocket, thereby increasing the distance between the drive chain and the ground.

[0005] Preferably, the two chain drive assemblies on the left and right sides of the frame are symmetrically arranged about the center line of the frame.

[0006] Preferably, the top sides of the two lower tension sprockets are at the same height and are higher than the axis of the drive sprocket, so that there is a drive chain between the two lower tension sprockets that is parallel to the direction of travel and higher than the axle.

[0007] Based on the above technical solution, the beneficial effects of this utility model are: This invention achieves four-wheel drive by using a motor to rotate one axle on one side of the chassis, and then using a chain drive between the two axles to rotate the other axle on the same side. To prevent the drive chain from contacting the ground, an upper tension sprocket and two lower tension sprockets are added. The upper tension sprocket causes the upper half of the drive chain to extend upwards from the top side of the sprocket, while the two lower tension sprockets cause the lower half of the drive chain to extend upwards from the bottom side of the sprocket. Ultimately, the entire drive chain shifts upwards after leaving the axle, increasing the distance between the drive chain and the ground, thus improving ground clearance. Compared to existing four-wheel drive chassis, this invention achieves a significantly higher ground clearance much more conveniently. Furthermore, when ground clearance needs to be adjusted, only different sized drive sprockets need to be replaced, and the installation height or size of the tension sprockets needs to be adjusted. This allows for very convenient adjustment of the maximum ground clearance of the four-wheel drive chassis, improving adaptability and economy. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a side perspective view of the present invention.

[0009] The markings in the diagram are: 1. Wheel, 2. Frame, 3. Motor, 4. Drive sprocket, 5. Drive chain, 6. Transmission sprocket, 7. Transmission chain, 8. Upper tension sprocket, 9. Lower tension sprocket. Detailed Implementation

[0010] Referring to the attached diagram, the specific implementation method is as follows: like Figure 1-3 As shown, a chain-driven high ground clearance four-wheel drive chassis includes a frame 2 and four wheels 1. The axles of the four wheels 1 are connected to the frame 2 respectively. The left and right sides of the frame 2 are respectively provided with chain drive assemblies for driving the two left wheels 1 and the two right wheels 1. The two chain drive assemblies on the left and right sides of the frame 2 are symmetrically arranged about the center line of the frame 2.

[0011] like Figure 1-3As shown, the chain drive assembly includes a motor 3 mounted on the frame 2. A drive sprocket 4 is mounted on the output shaft of the motor 3. A transmission sprocket 6 is mounted on each of the four axles. A drive chain 5 is fitted on the drive sprocket 4 and one of the transmission sprockets 6 located on the same side of the frame 2. A transmission chain 7 is fitted on the two transmission sprockets 6 located on the same side of the frame 2, so that the drive sprocket 4 can drive the two transmission sprockets 6 on the same side to rotate.

[0012] like Figure 1-3 As shown, each chain drive assembly also includes an upper tension sprocket 8 and two lower tension sprockets 9. The upper tension sprocket 8 and the two lower tension sprockets 9 are mounted on the side wall of the frame 2. The upper tension sprocket 8 is located at the middle of the drive chain 7 along its length. The two lower tension sprockets 9 are close to the two wheels 1 respectively, and the lower tension sprockets 9 are located between the drive sprocket 6 and the upper tension sprocket 8 along the length of the drive chain 7.

[0013] like Figure 1-3 As shown, the top side of the upper tension sprocket 8 is higher than the top side of the drive sprocket 6. Therefore, the upper half of the drive chain 7 extends upward from the top side of the drive sprocket 6 through the upper tension sprocket 8. The top side of the lower tension sprocket 9 is higher than the bottom side of the drive sprocket 6. The top sides of the two lower tension sprockets 9 are at the same height and are higher than the axis of the drive sprocket 6. Therefore, the lower half of the drive chain 7 extends upward from the bottom side of the drive sprocket 6 through the cooperation of the two lower tension sprockets 9. This results in a section of drive chain 7 between the two lower tension sprockets 9 that is parallel to the direction of travel and higher than the axle.

[0014] like Figure 3 As shown, the structure of this embodiment causes the entire drive chain to shift upwards after leaving the axle, increasing the distance between the drive chain and the ground and improving the chain's ground clearance. Compared with existing four-wheel drive chassis, this greatly facilitates the achievement of high ground clearance. Furthermore, when ground clearance needs to be adjusted, it is only necessary to replace the drive sprocket of a different size and adjust the installation height or size of the tensioner. This allows for very convenient adjustment of the maximum ground clearance of the four-wheel drive chassis, improving adaptability and economy.

Claims

1. A chain type high ground clearance four-wheel drive chassis, comprising a frame (2) and four wheels (1), the wheel shafts of the four wheels (1) are respectively connected with the frame (2), characterized in that: The left and right sides of the frame (2) are respectively provided with chain drive assemblies for driving the two wheels (1) on the left and the two wheels (1) on the right. The chain drive assembly includes a motor (3) mounted on the frame (2), a drive sprocket (4) mounted on the output shaft of the motor (3), a transmission sprocket (6) mounted on the four axles respectively, a drive chain (5) fitted on the drive sprocket (4) and one of the transmission sprockets (6) located on the same side of the frame (2), and a transmission chain (7) fitted on the two transmission sprockets (6) located on the same side of the frame (2), so that the drive sprocket (4) can drive the two transmission sprockets (6) on the same side to rotate; Each chain drive assembly also includes an upper tension sprocket (8) and two lower tension sprockets (9). The upper tension sprocket (8) is located at the middle of the transmission chain (7) along its length. The two lower tension sprockets (9) are close to the two wheels (1) respectively. The lower tension sprockets (9) are located between the transmission sprocket (6) and the upper tension sprocket (8) along the length of the transmission chain (7). The top side of the upper tension sprocket (8) is higher than the top side of the transmission sprocket (6), and the top side of the lower tension sprockets (9) is higher than the bottom side of the transmission sprocket (6). The upper tension sprocket (8) causes the upper half of the transmission chain (7) to extend upward from the top side of the transmission sprocket (6). The two lower tension sprockets (9) work together to cause the lower half of the transmission chain (7) to extend upward from the bottom side of the transmission sprocket (6), thereby increasing the distance between the transmission chain (7) and the ground.

2. The chain type high ground clearance four-wheel drive chassis according to claim 1, characterized in that: The two chain drive assemblies on the left and right sides of the frame (2) are symmetrically arranged about the center line of the frame (2).

3. The chain type high ground clearance four-wheel drive chassis according to claim 1, characterized in that: The top sides of the two lower tension sprockets (9) are at the same height and are higher than the axis of the drive sprocket (6), so that there is a drive chain (7) between the two lower tension sprockets (9) that is parallel to the direction of travel and higher than the wheel axle.

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