JPH0258882B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a multi-row rice transplanter in which transmission cases each having a planting claw are arranged side by side in the horizontal direction.

In general, in a rice transplanter, when the planting claw passes through the seedling take-out port of the seedling table, pebbles may get caught between the planting claw and the take-out port, or contact with foreign objects in the ground may occur. A torque limiter is interposed in the planting claw transmission system to prevent damage to the planting claw itself and the transmission member thereto when the planting claw becomes immobile.

However, in the past, one torque limiter was installed in the main transmission system above the power branch point to the many planting claws, making it difficult to set the maximum transmission torque.

In other words, if one torque limiter is used,
The minimum required maximum transmission torque is a value sufficient to apply the planting operation load to all planting claws, but if this maximum transmission torque is adjusted too much,
When the torque limiter is activated only by overloading a specific planting claw, a strong power is transmitted to this specific planting claw and its transmission member, and there is a high risk of deformation or damage. In addition, if the maximum transmission torque is adjusted too low, in the case of seedlings with strong roots and high resistance to removal, the torque limiter will be activated even if the total load of all the planting claws increases slightly, making it difficult to plant. In some cases, this was not carried out.

For this purpose, the maximum transmission torque of the torque limiter may be adjusted according to the planting conditions, but this operation is cumbersome and the adjustment is difficult.

The present invention is capable of solving such problems, and by effectively utilizing the means for solving the problems, it is possible to easily switch to a small number of rows planted near the edge of a ridge and return to a full rows planted state. The purpose of this machine is to provide a rice transplanter that can easily switch to a small number of row planting format. A torque limiter is installed inside each torque limiter, and a spring for setting the maximum transmission torque for each torque limiter and a receiver for the spring are installed inside, and a connecting tool is used to connect the spring receiver and the operating tool outside the transmission case. The spring receiver is configured to be freely operable by operating the operating tool to move the spring receiver to a side where the biasing force of the spring is weakened, and to a position where the transmission at the torque limiter is cut off. It is in.

In other words, the transmission torque of the planting claw is regulated for each transmission case, so as long as you take out the maximum transmission torque of each torque limiter and set it to the value required for planting seedlings with high resistance, you can use the specific planting claw. Even when the transmission case is stopped due to overload, the load can be suppressed to the specified maximum regardless of the load on the planting claws in other transmission cases, eliminating the problems that were seen when using a common torque limiter. Torque adjustment is no longer necessary.

Furthermore, in the present invention, the torque limiter built into each transmission case can be operated from the outside to stop the driving of the planting claws for each transmission case, so the seedlings can be removed from the seedling table and the seedlings can be removed using the seedling stopper. Compared to the conventional method of forming localized non-planted rows by blocking supply and obtaining a small number of rows, this method is extremely effective in switching to a small number of rows and returning to the original full rows. Now it can be done easily and quickly.

Furthermore, although the torque limiter is used as a single clutch, in order to cut off the transmission of torque from the torque limiter, the clutch piece of the torque limiter itself is not operated, but rather the spring that biases the clutch piece in the engagement direction is used. Since this is done by sliding the receiver to the side where the spring biasing force is weakened, compared to, for example, a case where the clutch piece of the torque limiter can be switched and operated by a shift fork against the biasing force of the spring. There is no need to perform an operation against the spring urging force for setting the maximum transmission torque, and further against the spring urging force to disengage the clutch, and the torque limiter can be easily cut.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

The drawing shows a rear-mounted riding 8-row rice transplanter, in which a wheel mark erasing device 2 and a seedling planting device 3 are sequentially connected to the rear of an agricultural tractor 1, and while the tractor 1 is traveling, the erasing device 2 is The wheels 4... erase traces of passage, and the seedlings on the seedling mounting table 5, which is reciprocated in the lateral direction of the machine by the seedling planting device 3, are planted in 8 rows by the 8 planting claws 6 arranged in parallel in the lateral direction of the machine. It is designed to be planted in the future.

7 in the figure is a float for stabilizing the position of the seedling planting device 2 on the ground and leveling the mud surface for planting.

As shown in FIG. 2, each of the planting nails 6 has two
A pair of transmission cases 9 are provided in four transmission cases 9, and the power from the engine (not shown) is transmitted to the transmission shaft 1.
0, the torque is transmitted via a torque limiter 11 and a bevel mechanism 12 to a drive shaft 13 of the planting claws 6, 6 which are mounted on a transmission case 9.

Reference numeral 8 in the figure is a main clutch for cutting off the power transmission to the transmission shafts 10.

The torque limiter 11 has a power transmission member 15 spline-fitted to the bevel shaft 14 so as to be slidable in the axial direction, and a spring receiver 16 that is loosely fitted and supported to the bevel shaft 14 so as to be slidable in the axial direction. is connected to a rod 17 as a linking member slidably mounted on the transmission case 9, and a compression spring 18 is tensioned between the transmission member 15 and the spring receiver 16, so that the power transmission member 15 is normally
is a rotating member 19 connected to the shaft end of the transmission shaft 10.
are interlocked to drive the planting claws 6, 6, and the planting claws 6,
6 comes into contact with hard ground and the driving load becomes large, the power transmission member 15 moves against the biasing force of the spring 18, disconnects from the rotating member 19, and the planting claw 6 , 6 can be avoided from being damaged.

The gear ratio of the bevel mechanism 12 is equal, and the drive shaft 13 makes one rotation for one rotation of the bevel shaft 14,
The planting claws 6, 6 are configured to perform one planting operation, and the power transmission portion 15 and the rotating member 1
The engaging cam member 20 interposed between the shafts 10 and 14 is disposed asymmetrically around the rotational axis, and
By making the relative position angles of the eight planting claws 6 constant, the eight planting claws 6 as a whole are configured to always perform the planting operation in the same posture.

The rods 17, 17 are pivotally connected to swing levers 21, 21 on the outside of the transmission case 9, and their swing operation moves the spring receiver 16 in the axial direction of the bevel shaft 14 and rotates it. The power transmission member 15 is separated from the member 19 to cut off power transmission to the planting claws 6, 6, so that the two planting claws 6, 6 can be stopped at once when planting a small number of rows, etc. It has been done.

A release wire 22 is connected to the swing levers 21, 21, and the operating portion 24 is connected to the driver's seat 23 so that desired two planting claws 6, 6, . . . can be stopped while in the driver's seat 23. It is located nearby.

In addition, after planting a small number of rows, all the seedlings placed on the mounting table 5 should be removed in the same phase.
The upper placed seedling is cut off and planting is started using all eight planting claws 6, which are operated in the same posture as described above.

The swing levers 21, 21 may be directly operated to cut off the power transmission to the planting claws 6.
Moreover, it is not limited to the swinging type, but may be of the sliding type, etc., as long as the transmission of power to the planting claws 6 is cut off, and these are collectively referred to as the operating tool 21.

The present invention is not limited to the rear-mounted riding 8-row rice transplanter as in the above embodiment, but also various types of riding-type and walking-type rice transplanters, as well as rice transplanters with 3 or more rows,
It is particularly applicable to multi-row rice transplanters with four or more rows.

[Brief explanation of drawings]

The drawings show an embodiment of the multi-row rice transplanter according to the present invention, with Fig. 1 being a side view, Fig. 2 being a plan view, and Fig. 3 being a longitudinal sectional view showing a power transmission section to the planting claws. be. 6... Planting claw, 9... Transmission case, 11... Torque limiter, 16... Spring receiver, 17... Linking tool, 18... Spring, 21... Operating tool.

Claims (1)

[Claims] 1 Transmission cases 9 equipped with planting claws 6 are arranged in parallel in the horizontal direction, each transmission case 9 is equipped with a torque limiter 11 that operates in response to overload of the planting claw 6, and each torque limiter Spring 1 sets its maximum transmission torque to 11
8 and a receiver 16 for the spring 18 are installed inside,
Further, the receiver 16 of the spring 18 and the operating tool 21 outside the transmission case 9 are linked to each other via the linking tool 17, so that the spring receiver 16 is moved by the biasing force of the spring 18 by operating the operating tool 21. A multi-row rice transplanter characterized in that it can be freely operated to a position where the torque limiter 11 is cut off by moving the rice transplanter to a side where the torque is weakened.