JPS5885761A - Power transmission for running wheel - Google Patents

Abstract

PURPOSE:To enable one-side wheel revolution to be relized with a simple structure by arranging a pair of rotational driving shafts for both the right and left wheels in parallel to the central axis of a driving gear connected to a motor and providing the follow-up gear on each of the rotational driving shafts in such a configuration as to be connected and disconnected to the driving gear. CONSTITUTION:The rotational power of a rotary shaft 61 of a motor is transmitted to a chain shaft 66 through gear train 62, 64, 65, and 60 and further transmitted to an output shaft 15 for a work machine from a change gear 67 through a gear 68, driving shaft 71 for the work machine, and bevel gear train 72 and 73. Besides, when a main clutch 65 is engaged, the power is transmitted to the right and left running driving shafts 79 and 79' from a gear 69 through the running driving gear 65 and follow-up gears 80 and 80' and the right and left wheels are revolved simultaneously. For example, in this state, when the shifter 81 of a side clutch is actuated and the connection between the follow- up gear 80 as a side clutch gear and the driving gear 76 is disconnected, the revolution of the left wheel is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power transmission device for running wheels of a running device such as a rice transplanter.

In a traveling device such as a rice transplanter that has running wheels on both the left and right sides of the machine, driving of one of the wheels is often stopped and only the other wheel is rotated when the machine is running.

This invention provides Suzo's simple power transmission device that can drive both the left and right wheels simultaneously or drive only one of the wheels independently. will be explained below.

The power transmission device according to the present invention has a pair of rotary drive shafts around both left and right wheels arranged parallel to a central axis of a drive gear connected to a prime mover, and ends of the rotary drive shafts facing each other. , each of the driven gears is provided to rotate with the shaft or to be slidable in the axial direction, and the driven gears can be meshed with the drive gear individually or both can be meshed simultaneously. It is a feature. Hereinafter, embodiments of the present invention shown in the drawings will be described.

Figure 1 is a side view of a rice transplanter to which the present invention has been applied.
A prime mover 2 is provided at the front end of the engine 2, and a gear box 3 projecting rearward from the prime mover 2 and a hydraulic pump 5 for operating a hydraulic cylinder 4 are attached to the prime mover 2. A chain case 6 serving as a rotating arm is pivotally supported on the body 1 by a shaft 6a, and a running wheel 7 is attached to the rear end of the chain case 6. The chain case 6 and the running wheels 7 are provided in pairs on both left and right sides of the machine body 1, respectively. A gear box 3 is attached to the traveling wheel 7.
Rotational driving force is transmitted from the prime mover 2 via the power transmission device housed inside and the chain inside the chain case 6. An arm 8 is provided at the front end of the chain case 6.
The front end of a rod 9 is pivotally attached to this arm 8. The rear end of the rod 9 is connected to a balance rod 10.
0 is connected to a piston 11 of a hydraulic cylinder 4.

A planting device 1a, which is a working machine, is provided at the rear of the body 1. The planting device 1a includes a seedling tank 25 which is provided so as to be movable left and right along a control knob 26, and divides and takes out the seedlings placed on the seedling tank 25 and plants them in the field. It is equipped with 22 planting rods. The rotational driving force transmitted from the power transmission device in the gear box 3 to the work machine output shaft 15 is transferred to the planting part mission case 12-
The transmission is transmitted from the drive shaft 14 to the horizontal drive shaft 14 housed in the transmission case 13 provided at both ends of the planting unit mission case 12 (via the chain housed here). Attachment rod 22. 1 installed on the back of the bacteria tank 25 and the seedling tank 25 and transmitted to the drive device of the T-100 feeding device 50, which inoculates the field with bacteria. A pair of floats 28°28' are provided on both the left and right sides.Float 2
8.28' has its rear part pivoted (A) to the rear machine frame 13aI of the rice transplanter, and its front end part connected to the connecting member 35. The connecting member 35 connects the rear end of the prime mover 2 and the gear box 3.
The connecting member 35 connects the floats 28 and 28' on both the left and right sides of the fuselage to each other. The central part of the connecting member 35 is an interlocking frame 38.
Vertical rod 412 rotating piece 42. It is connected to a hydraulic valve 44 via a horizontal rod 43, and the ground pressure is increased and the ground pressure is increased.
) 28. When the front part of 28' rises with respect to the aircraft body, the lever 44a of the hydraulic pressure valve 44 is rotated forward to supply hydraulic pressure to the hydraulic cylinder 4, and the piston 11 is extended. This lowers the traveling wheels 7, 7' on both sides. On the other hand, the tiller becomes shallower and the float becomes 28゜2.
If the ground pressure at 8' decreases, the hydraulic knob is switched in the opposite direction to raise the running wheels 7, 7'. This allows for appropriate planting in response to changes in the depth of the tiller. Note that a fuel tank 47 and a swing weight 37 are provided at the front of the fuselage 1.

Next, to explain the power transmission device, FIGS. 2 and 3 are cross-sectional views of the power transmission device during forward movement and reverse movement, respectively. , from the gear 62 provided at the tip thereof to the large gear 6 provided on the hydraulic pump drive shaft 63
4 to rotate the hydraulic pump drive shaft 63, and is also transmitted to the fixed gear 60 provided on the change shaft 66 via the small gear 65 provided integrally with the large gear 64, thereby rotating the change shaft 66. let The change shaft 66 is provided with a change gear 67 that rotates together with the change shaft 66 but is slidably fitted in the axial direction, and in the forward position, as shown in FIG. It meshes with the transmission gear 68 and the transmission gear 69 for traveling at the same time. This change gear 67 can be moved by a shifter 70.

The work equipment transmission gear 68 is welded to the work equipment drive shaft 71, and transmits the rotational power of the change gear 67 to the work equipment drive shaft 71, but this rotational power is transferred to the bevel gear 72.7.
3 to the aforementioned working machine output shaft 15. The traveling transmission gear 69 is loosely fitted to the working machine drive shaft 71 and rotates freely around the working machine drive shaft 71, but when the main clutch 75 is engaged, the main The rotational power from the change gear 67 is transmitted to a drive gear (clutch gear) 76 which is formed integrally with the clutch 75 and is similarly loosely fitted to the drive shaft 71 for the rotary work machine. The main clutch 75 is formed as a pin clutch, and is normally connected to a plurality of pins 7 provided at the tip.
5a is pressed by the spring 77, and the traveling transmission gear 6
Fits into a plurality of fitting holes 69a drilled in the side surface of 9,
Both gears 69° and 76 are connected, but by operating the shifter 7B, the pin 75a can be pulled out from the fitting hole 69a and the connection between them can be severed.

The drive gear 76 is simultaneously engaged with driven gears (side clutch gears) 80° and 80' that are movably fitted to the drive shafts 79, 79' for the left and right running wheels 7, 7', respectively. are doing. As a result, the rotational power transmitted via the main clutch 75 is transferred to the rotational drive shafts 79 on both sides.
, 79' simultaneously to rotate the running wheels 7, 7' on both sides. The driven gears 80 and 80' are always biased by springs 82 and 82' to mesh with the drive gear 76, but it is necessary to operate the shifters 81 and 81' of the side clutches attached to each of the driven gears 80 and 80'. By cutting off the connection between one of the side clutch gears and the drive gear 76, it is possible to stop driving one of the left and right running wheels.

Next, when moving backward, as shown in FIG. It meshes only with the traveling transmission gear 69 through the transmission gear 69. As a result, no rotational power is transmitted to the working machine output shaft 15, and only the running wheels 7, 7' rotate in the reverse direction.

In the illustrated example, the counter gear 83 performs deceleration.

As described above, the power transmission device according to the present invention has a pair of rotary drive shafts around both the left and right wheels arranged parallel to the central axis of the drive gear connected to the prime mover, and these auxiliary rotary drive shafts face each other. Each end is provided with a driven gear that rotates together with the shaft but is slidable in the axial direction, so that the driven gear can be meshed with the drive gear individually or both can be meshed simultaneously. As a result, although the structure is extremely simple, it is now possible to rotate both the left and right running wheels at the same time, or to rotate only one of them independently. In addition, switching between simultaneous left and right drive and independent drive of the running wheels can be performed near the end of the transmission path, which prevents the transmission path from becoming complicated and speeds up the operation for switching operations. It became possible to measure It is clear that this power transmission device can be applied to traveling devices other than rice transplanters.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a rice transplanter according to the present invention, and FIGS. 2 and 3 are cross-sectional views of a power transmission device according to the present invention. All figures show examples. 1...Airframe, 2...Motor, 3...Gearbox,
4...Hydraulic cylinder, 6...Chain case, 7...
- Traveling wheel, 15... Output shaft for work machine, 22... Planting rod, 25... Seedling tank, 2B... Float, 61
...Rotating shaft, 63... - Hydraulic pump drive shaft, 66...
・Change shaft, 67...Change gear, 68...Transmission gear for work equipment, 69...Transmission gear for traveling, 71...
Drive shaft for work equipment, 75...Main clutch, 76...
・Drive gear, 79.79'...Rotation drive shaft, 80, 8
0'...driven gear, 83 counter gear. Patent applicant: Iseki Agricultural Machinery Co., Ltd. Agent: Hiroshi Sugawara, patent attorney

Claims (1)

[Claims] (1) A power transmission device for transmitting rotational power of a prime mover to traveling wheels provided on both left and right sides of a traveling device,
A pair of rotary drive shafts around both the left and right wheels are arranged parallel to the central axis of the drive gear connected to the prime mover, and a pair of rotary drive shafts that rotate together with the shafts but in the axial direction are placed at opposite ends of the two rotary drive shafts. A power transmission device for running wheels, characterized in that each of the driven gears is provided with a slidable driven gear, and the driven gears can be meshed with the drive gear individually or both can be meshed simultaneously. .