Double drive wheel power transmission mechanism for rice transplanter overrunning clutch type

Abstract

The double drive wheel power transmission mechanism of the rice transplanter overrunning clutch type belongs to agricultural machinery; coaxial and rotatable left wheel shafts with left drive wheels and left overrunning clutches and right wheel shafts with right drive wheels and right overrunning clutches are respectively arranged on the left and right lower parts of the frame assembly; left bevel gears D and right bevel gears D are respectively fixed on the left overrunning clutch and the right overrunning clutch; left split power shafts with left bevel gears B and C and right split power shafts with right bevel gears B and C are respectively rotatably inserted on the left and right sides of the upper end of the frame assembly; and a total drive shaft with left bevel gears A, a drive belt wheel and right bevel gears A is rotatably supported and arranged on the upper end of the frame assembly through a bearing seat assembly; the mechanism uses overrunning clutches to replace planetary differential gears to complete double drive wheel driving and differential motion, has simple structure, low manufacturing cost, reliable use, flexible turning maneuvering and convenient maintenance.

Description

Technical Field

[0001] This invention belongs to agricultural machinery and mainly relates to an overrunning clutch type dual-drive ground wheel power transmission mechanism installed on a rice transplanter. Background Technology

[0002] Traditional walking-behind rice transplanters are machines that use a combination of single-wheel drive and a boat-shaped structure. Due to their single-wheel drive, rice transplanting has several drawbacks: ① Low traction, leading to slippage and wheel spin, increased fuel consumption, and uneven plant spacing; ② High steering resistance, poor precision, strenuous operation, and a tendency to skid in wet fields; ③ Poor maneuverability, low efficiency, requiring manual lifting when stuck in mud or climbing over field ridges, increasing labor intensity; ④ Single-wheel drive leaves deep furrows in the soil, disrupting field flatness and affecting the quality and effectiveness of subsequent irrigation and field management. To address these technical problems, a four-wheel-supported, dual-wheel-drive riding rice transplanter has been successfully developed and is widely used in rice transplanting, becoming one of the main models currently used in rice transplanting. However, because this type of machine uses a planetary gear differential structure between the two drive wheels to realize and complete the power transmission and differential movement between the two wheels, there are problems that need to be overcome and solved, such as complex structure and high manufacturing cost. Summary of the Invention

[0003] The purpose of this invention is to address the problems existing in the prior art and, in combination with the actual needs of current mechanized rice transplanting operations, to develop a new structure for a rice transplanter with an overrunning clutch-type dual-drive ground wheel power transmission mechanism. This mechanism aims to achieve the following: simple structure, low manufacturing cost, reliable power transmission and drive, smooth and easy operation, convenient maintenance, and good applicability.

[0004] The objective of this invention is achieved as follows: A left and right wheel axle are coaxially and rotatably inserted into the lower left and right sides of the frame assembly, respectively. A left overrunning clutch and a left drive wheel are fixed to the inner and outer ends of the left wheel axle, respectively. A left bevel gear D is fixed to the inner end of the left overrunning clutch. A right overrunning clutch and a right drive wheel are fixed to the inner and outer ends of the right wheel axle, respectively. A right bevel gear D is fixed to the inner end of the right overrunning clutch. A main drive shaft is rotatably supported by two coaxially opposite bearing assemblies on the upper end of the frame assembly. A drive pulley is fixed to the middle part of the main drive shaft. Left bevel gear A and right bevel gear A are fixedly mounted on the left and right ends respectively. Left and right power shafts are vertically and rotatably inserted into the left and right sides of the upper end of the frame assembly respectively. Left bevel gear B and left bevel gear C are fixedly mounted on the upper and lower ends of the left power shaft respectively. Left bevel gear B and left bevel gear C mesh with left bevel gear A and left bevel gear D respectively. Right bevel gear B and right bevel gear C are fixedly mounted on the upper and lower ends of the right power shaft respectively. Right bevel gear B and right bevel gear C mesh with right bevel gear A and right bevel gear D respectively. This constitutes the overrunning clutch type dual-drive ground wheel power transmission mechanism of the rice transplanter.

[0005] This invention creates a technical solution that uses an overrunning clutch to replace the planetary gear differential, achieving synchronous drive for dual-drive ground wheels and differential speed during machine turning. It features simple structure, low manufacturing cost, reliable drive and use, flexible turning, and convenient maintenance. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the overall structure of the overrunning clutch-type dual-drive ground wheel power transmission mechanism of a rice transplanter.

[0007] Part number description in the image:

[0008] 1. Drive pulley; 2. Main drive shaft; 3. Left bevel gear A; 4. Left bevel gear B; 5. Left sub-drive shaft; 6. Left drive wheel; 7. Left wheel axle; 8. Left overrunning clutch; 9. Left bevel gear D; 10. Left bevel gear C; 11. Frame assembly; 12. Right bevel gear D; 13. Right drive wheel; 14. Right wheel axle; 15. Right overrunning clutch; 16. Right bevel gear C; 17. Right bevel gear B; 18. Right bevel gear A; 19. Bearing housing assembly; 20. Right sub-drive shaft. Detailed Implementation

[0009] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. A double-drive ground wheel power transmission mechanism for a rice transplanter with an overrunning clutch is provided. A left wheel axle 7 and a right wheel axle 14 are coaxially and rotatably mounted on the lower left and right sides of the frame assembly 11. A left overrunning clutch 8 and a left drive ground wheel 6 are fixed to the inner and outer ends of the left wheel axle 7, respectively. A left bevel gear D9 is fixed to the inner end of the left overrunning clutch 8. A right overrunning clutch 15 and a right drive ground wheel 13 are fixed to the inner and outer ends of the right wheel axle 14, respectively. A right bevel gear D12 is fixed to the inner end of the right overrunning clutch 15. A main drive shaft 2 is rotatably supported by two coaxially opposite bearing assemblies 19 on the upper end of the frame assembly 11. A drive pulley 1 is fixed to the main drive shaft. On the middle part of shaft 2, a left bevel gear A3 and a right bevel gear A18 are fixedly mounted on the left and right ends of the main drive shaft 2, respectively. A left power shaft 5 and a right power shaft 20 are vertically and rotatably inserted into the left and right sides of the upper end of the frame assembly 11, respectively. A left bevel gear B4 and a left bevel gear C10 are fixedly mounted on the upper and lower ends of the left power shaft 5, respectively. The left bevel gear B4 and the left bevel gear C10 mesh with the left bevel gear A3 and the left bevel gear D9, respectively. A right bevel gear B17 and a right bevel gear C16 are fixedly mounted on the upper and lower ends of the right power shaft 20, respectively. The right bevel gear B17 and the right bevel gear C16 mesh with the right bevel gear A18 and the right bevel gear D12, respectively.

[0010] During operation, the external input rotational power synchronously drives the left bevel gear A3 and the right bevel gear A18 to rotate via the drive pulley 1 and the main drive shaft 2. The rotating left bevel gear A3 drives the left drive wheel 6 to rotate forward via the left bevel gear B4, the left branch power shaft 5, the left bevel gear C10, the left bevel gear D9, the left overrunning clutch 8, and the left wheel shaft 7. Simultaneously, the rotating right bevel gear A18 drives the right drive wheel 13 to rotate forward via the right bevel gear B17, the right branch power shaft 20, the right bevel gear C16, the right bevel gear D12, the right overrunning clutch 15, and the right wheel shaft 14, thus realizing the linear motion of the machine with dual drive wheels. Forward movement; when the machine needs to turn left during operation, the left overrunning clutch 8 normally drives the left wheel axle 7 to drive the left drive ground wheel 6 to complete the movement. At this time, the right overrunning clutch 15 starts to overrun, realizing the speed difference between the left and right drive ground wheels 6 and 13 when turning, completing the left turn movement, and vice versa to complete the right turn movement; when the left drive ground wheel 6 on the left wheel axle 7 slips, the right overrunning clutch 15 on the right wheel axle 14 stops overrunning and starts to drive, so that the right drive ground wheel 13 can move, solving the problem that the left drive ground wheel 6 cannot move forward due to slippage, and allowing the left drive ground wheel 6 to get out of trouble.

Claims

1. A double-drive ground wheel power transmission mechanism for a rice transplanter with an overrunning clutch, characterized in that: A left axle (7) and a right axle (14) are coaxially and rotatably inserted into the lower left and right sides of the frame assembly (11). A left overrunning clutch (8) and a left drive wheel (6) are fixed to the inner and outer ends of the left axle (7), respectively. A left bevel gear D (9) is fixed to the inner end of the left overrunning clutch (8). A right overrunning clutch (15) and a right drive wheel (13) are fixed to the inner and outer ends of the right axle (14), respectively. A right bevel gear D (12) is fixed to the inner end of the right overrunning clutch (15). A main drive shaft (2) is rotatably supported by two coaxially opposite bearing assemblies (19) on the upper end of the frame assembly (11). A drive pulley (1) is fixed to the middle part of the main drive shaft (2). Left bevel gear A (3) and right bevel gear A (18) are fixedly mounted on the left and right ends of shaft (2), respectively. Left power shaft (5) and right power shaft (20) are vertically rotatably inserted into the left and right sides of the upper end of frame assembly (11), respectively. Left bevel gear B (4) and left bevel gear C (10) are fixedly mounted on the upper and lower ends of the left power shaft (5), respectively. Left bevel gear B (4) and left bevel gear C (10) mesh with left bevel gear A (3) and left bevel gear D (9), respectively. Right bevel gear B (17) and right bevel gear C (16) are fixedly mounted on the upper and lower ends of the right power shaft (20), respectively. Right bevel gear B (17) and right bevel gear C (16) mesh with right bevel gear A (18) and right bevel gear D (12), respectively.

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