JPH04123723U - Speed change operation structure of rice transplanter - Google Patents

Abstract

(57) [Summary] [Structure] A double tension clutch type two-stage pulley transmission mechanism 2 is selectively turned on and off using an electric cylinder,
The two-stage pulley transmission device 2 is operated in conjunction with a switch 17 that is turned on when the planting lever 16 is turned off, and the electric cylinder 11 is operated to select the low-speed side belt transmission mechanism 8 regardless of the current high-low speed change situation. A low speed control mechanism A is provided, and
The operation of this low speed control mechanism A is controlled by the planting clutch lever 16.
A timer 18 is provided to release the switch 17 after a predetermined period of time has elapsed from the OFF operation of the switch 17 when the switch 17 is turned on, thereby controlling the transmission state to return to the state before the operation of the low speed control mechanism A. [Effects] When turning during planting work, it is now necessary to simply operate the planting clutch, making turning operations easier, and the rice transplanter can more stably increase the maximum speed after turning. We were able to provide a speed change operation structure.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a rice transplanter equipped with a multi-stage pulley transmission. All of the belt transmission mechanisms with multiple sets of tension clutches with different ratios are connected to a single transmission mechanism. It is installed in parallel across the shaft, and one of the multiple sets of belt transmission mechanisms is installed in parallel across the shaft. Clutch operation mechanism that selectively selects two tension clutches and operates them on and off A rice transplanter's transmission system is equipped with a multi-stage pulley transmission system that is equipped with a Concerning operation structure.

0002

[Conventional technology]

This type of shift operation structure is shown in Japanese Patent Application Laid-Open No. 64-22626. As shown in the figure, a multi-stage pulley transmission with three sets of belt transmission mechanisms is replaced by a single transmission. One of the belt transmission mechanisms can be selected and set by swinging the lever. What has been done is known.

0003

[Problem that the idea aims to solve]

When turning the rice transplanter at the edge of a ridge while planting seedlings, disengage the planting clutch. In addition to cutting off the planting operation, it also suppresses mud scraping and adjusts to the increasing running resistance. Reduce speed according to your convenience. The mud layer on the planted field is deep or rough, etc. If you are planting at the lowest speed, there is no need to decelerate when turning. In rice fields, relatively shallow mud layers, and flat rice fields, planting work is done at relatively high speeds. In this case, the vehicle will be decelerated when turning. Conventionally, the deceleration operation described above was performed by manually operating the gear shift lever. It is often necessary to change gears every time a turn is made, which tends to make the operation complicated. It was. The purpose of the present invention is to simplify the deceleration operation when turning during planting work.

0004

[Means to solve the problem] For the above purpose, the present invention provides the speed change operation structure of the rice transplanter described at the beginning. A clutch operating device is provided with an actuator that turns the tension clutch on and off. It is activated when the planting clutch lever is turned off. A sensor is installed, and in conjunction with the operation of this sensor, the multi-stage pulley transmission at that time is The tension clutch of the belt transmission mechanism on the lower speed side than the selected belt transmission mechanism in or the selected belt transmission mechanism has the highest reduction ratio. If so, the actuator is set so that the tension clutch continues to be engaged. A low-speed control mechanism is provided to operate the motor, and the operation of this low-speed control mechanism is controlled by the planting truck. The sensor is released after a predetermined period of time has elapsed since the sensor was released due to the latch operation. A time limit means is provided to control the transmission to return to the state before the operation of the low speed control mechanism. It is characterized by:

[0005]

[Effect]

As mentioned above, when turning in rice fields, the planting clutch is disengaged to stop the planting operation. After that, the vehicle will shift to turning, so when the planting clutch lever is turned off, the multi-step - The transmission automatically decelerates to the lower speed side, or the vehicle is originally running at the lowest speed. With the above feature configuration that maintains the same state, conventional manual deceleration operations are no longer required. To the point. After the turn is completed, in order to resume the planting work, the vehicle returns to its pre-turn speed. In both cases, the planting clutch lever must be turned on again, but the In the characteristic configuration described above, when the planting clutch lever is turned on, the sensor is deactivated. The above feature configuration automatically cancels low speed control, eliminating the need for conventional manual speed increase operations. Make it. In addition, if the traveling speed before the turn is other than the minimum speed, the timer is used to complete the turn. Even if you operate the planting clutch to engage when the planting is finished, the car will run at a low speed for a while and then return to the previous speed. , it is possible to reliably plant in a straight line, which is good for work accuracy. , the rolling motion caused by the turn is better when the vehicle has moved straight ahead than immediately after the turn. This makes the aircraft more stable and allows for smoother acceleration behavior.

[0006]

[Effect of the idea]

Therefore, when turning during planting work, all you need to do is operate the planting clutch. This makes turning operations easier, and the maximum speed increase operation after turning is more stable. We have been able to provide a speed change operation structure for a rice transplanter that also has the advantage of being able to operate in a fixed state.

[0007]

【Example】

Embodiments of the present invention will be described below based on the drawings. Figure 1 shows the transmission structure at the front of the riding rice transplanter. engine 1 The power of The output of mission 3 is input to transmission shaft 4 and is driven by transmission shaft 4 (not shown). It is configured to transmit power to the wheels.

[0008] As shown in FIG. 1, the two-stage pulley transmission 2 is connected to the output shaft 5 of the engine 1 and the transmission The first belt transmission mechanism 8 with a high reduction ratio (low speed) and the input shaft 6 of the engine 3 The second belt transmission mechanism 10 with a speed ratio (high speed) is installed side by side, and each transmission The structures 8 and 10 are equipped with tension-type first and second clutches 7 and 9. Both the clutches 7 and 9 are provided with first and second electric shafts for dedicated on/off operation, respectively. Cylinders (corresponding to actuators) 11 and 12 are provided, and these cylinders 11, 12 and a shift lever 13 for manual operation are connected via a control device 14. In addition, it is activated and disconnected by engaging the planting clutch lever 16 provided in the control section. A detection switch (corresponding to a sensor) 17 that is deactivated by operation is provided, and this detection A switch 17 and a timer (corresponding to a timer) 18 are connected to the control device 14. There is.

[0009] In the Honda transplanter, the two-stage pulley speed is changed in conjunction with the operation of the detection switch 17. Regardless of the selection status of both belt transmission mechanisms 8 and 10 in the device 2, the first belt Both electric cylinders 11 and 12 are controlled so that the first clutch 7 of the transmission mechanism 8 is engaged. A low speed control mechanism A operated by a controller 14 is provided. In other words, when the start switch S is turned on and operated, the low speed control mechanism A is activated. For example, as shown in FIG. 1, by operating the speed change lever 13 to the high speed position H, the second belt When the speed mechanism 10 is in the transmission state where it is selected, the planting clutch is activated when turning at the edge of a ridge, etc. When the lever 16 is turned off, the detection switch 17 is turned on and based on the information The control device 14 drives the second cylinder 12 and disengages the second clutch 9 (virtual diagram in FIG. 1). line condition), the first cylinder 11 is driven and the first clutch 7 is engaged (Fig. 1 (the state indicated by the virtual line) and switches to the low speed state. Then, when the turning is completed and the planting clutch lever 16 is operated again, the inspection is performed. The output switch 17 is turned off, and the control device 14 controls the first cylinder 11 based on that information. to disengage the first clutch 7, and also drive the second cylinder 12 to disengage the second clutch 7. The latch 9 is turned on to switch to the high speed state, but the detection switch 17 is turned on. Both cylinders 11 and 12 are activated by the action of the timer 18, which operates only in conjunction with the operation. The drive operation is delayed by a preset period of time (for example, 3 seconds). The low speed running state is maintained for a predetermined period of time after the planting clutch lever 16 is engaged. After that, the vehicle is controlled to switch to high-speed driving. The above control is performed even when the first belt transmission mechanism 8 is in the selected transmission state. However, in this case, when the planting clutch lever 16 is turned off, the The control device 14 functions so that the low speed running state of the vehicle is maintained. The above series The control form by the low speed control mechanism A is shown in FIG. 2 for reference.

0010 When the start switch S is turned off and the gear shift lever 13 is moved to the neutral position N, the low The operation of the speed control mechanism A is released and becomes a manual operation state, and both clutches 7, 9 are both turned off, resulting in a neutral state in which transmission is cut off. And gear lever 1 3 to the low speed position L, only the first clutch 7 is engaged and the state is low speed running. appears, and when operated to high-speed position H, only the second clutch 9 is engaged, resulting in high-speed running. The line state is revealed. In this embodiment, the electric cylinders 11, 12 and the control A clutch operation mechanism B is constituted by the device 14 and the like. Also, timer 1 If you can select and set the time limit in 8, you can set the optimal time according to the rice field situation. It is convenient to choose.

[0011] [Another example] In the above embodiment, the multi-stage pulley transmission device 2 has two stages, high and low. A rice transplanter equipped with a three-stage pulley transmission device 2 consisting of medium speed and low speed is shown in Figure 3. It may also constitute the low speed control mechanism A that operates according to the flowchart. this In this case, the medium-speed belt transmission mechanism and the transmission operating tool of the main transmission 3 are shown in FIG. It will be additionally connected to the transmission control system (control device 14). With this three-stage pulley transmission device 2, when turning during high-speed planting, it is possible to Therefore, deceleration control is performed to medium speed or low speed, and the control criterion is It uses changes in engine speed. In addition, in the flowchart of FIG. 3, when the main gear shift is ``driving'', the moving driving state is changed to N. O indicates the driving state of the planting work. When tension clutches 7 and 9 are operated by actuators using hydraulic cylinders, Alternatively, a timer mechanism may be incorporated into the control device 14 consisting of a microcomputer. Other means can be considered, such as configuring a time limit means.

0012 In addition, in order to facilitate comparison with the drawings, symbols are written in the scope of claims for utility model registration. However, the present invention is not limited to the configuration shown in the attached drawings.

[Brief explanation of drawings]

[Figure 1] Circuit diagram showing the transmission control system

[Fig. 2] Diagram showing the control form by the low-speed control mechanism

[Fig. 3] Flowchart showing the control form in the case of a three-stage pulley transmission device

[Explanation of symbols]

5,6 Transmission shaft 7,9 Tension clutch 8,10 Belt transmission mechanism 11,12 Actuator 16 Planting clutch operation tool 17 Sensor 18 Time-limited means A Low speed control mechanism B Clutch operation mechanism

Claims (1)

[Scope of utility model registration request] [Claim 1] A belt transmission mechanism (8) with a plurality of sets of tension clutches (7) and (9) having different transmission ratios,
(10) are installed in parallel across a pair of transmission shafts (5) and (6), and one tension clutch ( A multi-stage pulley transmission device (2) comprising a clutch operating mechanism (B) that selectively selects 8) to operate on and off.
is a speed change operation structure for a rice transplanter that is provided in a transmission system for traveling, and includes actuators (11) and (12) for turning on and off the tension clutches (7) and (9) to operate the clutch operation mechanism. (B), and
A sensor (17) is provided that operates when the planting clutch operating tool (16) is disconnected, and the selection in the multi-stage pulley transmission (2) at that time is determined in conjunction with the operation of the sensor (17). Tension clutch (7) of the belt transmission mechanism (8) on the lower speed side than the belt transmission mechanism (10)
The actuator (11) is operated to engage the selected belt transmission mechanism (8), or to continue to engage the tension clutch (7) if the selected belt transmission mechanism (8) has the highest reduction ratio. Low speed control mechanism (A)
and the low speed control mechanism (A) is deactivated after a predetermined period of time has elapsed from the deactivation of the sensor (17) accompanying the engaging operation of the planting clutch operating tool (16) to perform the low speed control. A speed change operation structure for a rice transplanter, which is provided with a timer (18) for controlling the return to the transmission state before the operation of the mechanism (A).