JPH09132048A - Shift operation configuration - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute an operation system which can simply perform both a shift operation making switch-over between each forward gear and a reverse gear and a shift operation for acceleration and deceleration. SOLUTION: A forward movement position F moving a vehicle forward is set at the forward side, and a reverse movement position R moving a vehicle rearward is set at the rearward side so as to allow the operation path of a shift lever 13 to be formed into a fore and rear posture, and concurrently an acceleration position IN is set at the upperward side of the forward movement position F, and a deceleration position DE is set at the downward side so as to allow an operation path for acceleration/deceleration to be in a vertical posture in a configuration branched out of the operation path in a longitudinal posture. Besides, when the shift lever is operated between the forward speed position F and the reverse speed position R, a mechanical operation system is provided, which operates a gear type forward/reverse gear shifter E by the force of the shift lever 13, and when the shift lever 13 is operated to the acceleration position IN or the deceleration position DE, an electrical operation system is provided, which shift operate a continuously variable transmission V only for the period of time when each shift operation to the aforesaid positions is electrically detected so as to be operated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear shift operation structure, and more particularly, to an improvement of a technique for performing forward / backward movement and speed change of a vehicle body with a single gear shift operation tool.

[0002]

2. Description of the Related Art As a gear shift operation structure constructed as described above, there is one disclosed in Japanese Unexamined Patent Publication No. 7-52671. In this conventional example, a straight operation path for forward / reverse switching and acceleration / deceleration are provided. Linearly adjacent to each other in a parallel state, a path is formed so that the operating tool can be introduced from the forward position of the forward / backward switching operation path to the acceleration / deceleration speed change path. The route is configured so that the traveling speed can be switched between two stages, a low speed state and a high speed state.

[0003]

As in the conventional example, in which the forward / backward movement of the body is switched and the traveling speed is switched by a single operating tool, compared with the case where a plurality of operating tools are held and operated. It enables simple and easy operation. Further, when changing the traveling speed, it is desired that the traveling speed can be increased or decreased by a simple operation.

In particular, some work machines such as rice transplanters and tractors are provided with a continuously variable transmission so that the traveling speed can be changed steplessly. Conventionally, in this type of continuously variable transmission, the operation tool is set. The position and the shift setting position correspond to each other, and if the gear is to be greatly shifted, the gear shift operation tool has to be operated greatly,
Improvements are also desired in this respect.

An object of the present invention is to rationally obtain a gear shift operation structure that enables switching between forward and backward movements and switching of traveling speed of a vehicle body by a simple operation of a single operating tool.

[0006]

A first feature of the present invention is as follows.
The operation path of the speed change operation tool is configured to be switchable between a forward position for moving the machine body forward and a reverse position for moving the machine body backward, and an increase path branched from this forward position into two directions different from the forward / backward speed change operation path. This is in the point that an operation path leading to the high speed position and the deceleration position is formed, and its operation is as follows.

A second feature of the present invention is a machine for operating a gear type forward / reverse speed change device by a force from the gear shift operating tool when the gear shift operating tool is operated between a forward drive position and a reverse drive position. In addition to being equipped with a type of operation system, when operating the speed change operation tool to the acceleration position or the deceleration position, the operation to this position is electrically detected and operated only for the operated time or It is provided with an electric operation system for shifting the continuously variable transmission according to the number of times, and its operation is as follows.

[Operation] According to the first feature described above, the gear shift operation tool is set to the reverse position when the vehicle body moves backward, and the gear shift operation tool is set to the forward position when moving the vehicle body forward. When increasing the traveling speed of the aircraft, it is sufficient to operate the speed change operation tool set to the forward position to the acceleration position, and when decreasing the traveling speed of the machine, move the speed change operation tool set to the forward movement position to the deceleration position. It is enough to operate. In other words, by branching to the end of the operation path to form two operation positions of the acceleration position and the deceleration position, it becomes possible to easily increase or decrease the forward speed.

According to the above-mentioned second feature, when the speed change operation tool is operated between the forward drive position and the reverse drive position, the force from the speed change operation tool is applied via the mechanical operation system to the front and rear of the gear type. Operate the forward speed change device to move the speed change operation tool to the acceleration position, or
When the vehicle is operated to the deceleration position, the operation to that position is electrically detected, and the continuously variable transmission is gear-shifted through the electric operation system. In other words, when switching between forward and reverse, the gear type speed change system can be reliably operated with a large operation stroke of the speed change operation tool, and the speed change state can be identified from the position of the speed change operation tool. The operation of the gear shift operation device is detected electrically, and the continuously variable transmission is operated to shift only during the time when it is operated, or in response to the number of times it is operated. The size can be reduced, and the shift operation can be performed by the required shift amount as necessary.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a drive-type front wheel 1 and a drive-type rear wheel 2 that are steered.
The engine 4 is mounted on the front of the traveling body 3 provided with a belt-type continuously variable transmission V and the transmission case 5 to which power from the engine 4 is transmitted. Also, a driver seat 6 is provided at the center of the traveling body 3.
The lift cylinder 7 to the rear end of the traveling machine body 3.
The seedling planting apparatus A is connected through the link mechanism 8 that is driven and raised by the above to construct a riding type rice transplanter as a working machine.

On the right side of the driver's seat 6, the raising and lowering of the seedling planting device A and the planting clutch B built in the mission case 5 are carried out.
As shown in FIG. 6, the elevating lever 9 is provided on the front side of the “lower” position in the path formed in the guide 10, as shown in FIG. The seedling planting device A is lowered, and the seedling planting device A is raised by setting it to the rear side from the “elevation” position, and when it is set to the “neutral” position, the seedling planting device A is maintained at that level. When the elevating lever 9 is set to the "ON" position in cooperation with the system, the planting clutch B is engaged and operated, and the ground leveling float provided in the seedling planting apparatus A is grounded to a predetermined height against the field. In cooperation with the control system so as to perform automatic lifting control for maintaining, the planting clutch B is disengaged when set to the "OFF" position, and when the lifting lever 9 is set to the "Automatic" position, the forced lifting lever described later is used. Seedling planting device A according to the operation of
The vertical movement of the planting clutch B is allowed and the planting clutch B is automatically disengaged when the planting plant A is raised. The planted clutch B is configured to be turned on and off by the operation of an electric motor (not shown).

As shown in FIG. 5, on the right side surface of the post portion of the steering handle 11 in front of the driver's seat 6, a spring (not shown) is urged to a neutral position N in a substantially horizontal posture. A forcible lifting lever 12 is provided at a raised position U for raising the seedling planting apparatus A to an upper limit and a lowered position D for lowering the seedling planting apparatus A to an automatic raising / lowering control height. In addition, by operating to the descending position D, the seedling planting device A
After being lowered to a height at which automatic raising and lowering is performed, the forced raising / lowering lever 12 is operated again to the lowering position D so that it is also used as an operating position for engaging and operating the planted clutch B.

As shown in FIGS. 2 and 3, the left side surface of the post portion of the steering handle 11 is freely operable between a forward drive position F and a reverse drive position R, and is formed upward based on the forward drive position F. A speed change lever 13 as a speed change operation tool that can be operated between a speed position IN and a deceleration position DE formed below.
It has. By operating the shift lever 13 to the forward drive position F or the reverse drive position R, the forward / reverse drive transmission E built in the mission case 5 is mechanically operated via the operation rod 14, and the speed increasing position IN or , By operating to the deceleration position DE, this operation
Is configured to be detected by the speed increasing switch 15 or the deceleration switch 16 arranged at the base end portion of and to electrically operate the continuously variable transmission V. Further, the speed change lever 13 is biased by a spring (not shown) so as to be held at an intermediate position between the speed increasing position IN and the deceleration position DE (this position is the forward moving position F) in a state where it is set to the forward moving position F. Acceleration position I
It is configured to return to the intermediate position (forward position F) by releasing the hand after operating to N or the deceleration position DE. Further, the forward position F is provided at the base end of the speed change lever 13.
The neutral switch 17 is provided for detecting the passage of a neutral position intermediate between the reverse position R and the reverse position R.

As shown in FIG. 2, in the continuously variable transmission V, an endless belt 20 extends over a drive pulley 18 provided on the output shaft 4A of the engine 4 and a driven pulley 19 provided on the input shaft 5A of the transmission case 5. This endless belt 20
Is provided with a tension pulley 21 for applying tension, and the drive pulley 18 and the driven pulley 19 are configured as split pulleys whose belt winding diameter can be freely changed.
Operating mechanism 22 for simultaneously changing the belt winding diameters of 8 and 19
The continuously variable transmission V is continuously changed in speed by transmitting the driving force from the electric cylinder type speed change motor 23 to the operation mechanism 22 via the swing link 24 and the operation rod 25. . Further, a main clutch C is provided coaxially with the input shaft 5A of the mission case 5, and the main clutch C
Is disengaged by depressing the main clutch pedal 26 provided for the step to cut off the transmission of power to the transmission case 5, and the depressing operation releases the main clutch C.
Return to the ON state and reach the transmission state.

Further, the swing link 24 is provided with a potentiometer-type shift sensor 27 that swings integrally with the swing link 24, and it is further increased to determine that the swing link 24 has reached the shift limit posture. A limit switch 28 on the speed side and a limit switch 29 on the deceleration side are provided, and the main clutch pedal 26
A main clutch switch 30 for detecting the depression of the main clutch pedal 26 is provided in the vicinity of the
A planting clutch switch 31 for determining the state of the planting clutch B is provided in the vicinity of the planting clutch B built in.

As shown in FIG. 4, on the panel surface 32 at the front position of the driver's seat 6, there is a gear shift display section 33 for displaying the gear shift position of the continuously variable transmission V by the number of lights of a large number of lamps 33A, and a plurality of types. Is provided with an automatic deceleration switch 35 having a structure for mechanically holding the operation position.

As shown in FIG. 7, a shift control system is constructed. In this control system, shift signals from the speed increasing switch 15 and the decelerating switch 16 are input to a control device 36 equipped with a microprocessor. System, the neutral switch 1
7, a system for inputting deceleration signals from each of the main clutch switch 30, the automatic deceleration switch 35 and the planted clutch switch 31 arranged in series, and a system for receiving a signal from the shift sensor 27, and controlling the same. An output system for controlling a relay 37 for driving the shift motor 23 is formed from the device 36, and the limit switches 28, 2 are formed in this output system.
9 is provided, and an output system for the speed change display portion 33 is further formed. An oil pressure switch 38 is provided in the power supply system of the relay 37 so that the relay 37 operates only when the engine 4 is in operation.

With this configuration, when the speed change lever 13 is operated to the rearward reverse position R, the forward / reverse speed change device E is changed to the reverse position via the operating rod 25, and the speed change lever 13 is moved forward. Similarly, when the forward / reverse position F is operated to shift the forward / reverse transmission to the forward position via the operating rod 25, and when the shift lever 13 is operated from the forward position F to the upper speed increasing position IN. This operation is detected by the speed increasing switch 15, and the continuously variable transmission V is operated in the speed increasing direction by driving the speed change motor 23, and at the same time, the current speed change is performed by increasing the number of lights of the lamp 33A of the speed change display section 33. When the gear shift lever 13 is operated to the lower deceleration position DE, the deceleration switch 16 detects this operation and drives the transmission motor 23 to drive the continuously variable transmission. While operating in the deceleration direction, so that it visually grasp the current shift position in lighting a decrease in the number of lamps 33A of the speed indicator 33. When the shift lever 13 is set to the reverse position R, the shift position of the continuously variable transmission V is maintained at the preset low speed position.

Further, when the gear shift lever 13 is erroneously operated for a moment during this gear shift, the control operation is set so as not to perform the gear shift. This control operation is performed by the speed increasing switch 15 or the speed increasing switch 15 as shown in the flow chart of FIG. , Deceleration switch 1
When the shift signal from 6 is input to the control device 36, only when the input signal continues for a relatively short time of less than 1 second such as 0.5 seconds (steps # 101 to # 103). The drive of the shift motor 23 is started corresponding to the shift direction, and this drive is continued for the time when the shift signal is input (steps # 104 to # 106).

Further, in the control device 36, the speed change lever 13
Is operated between the forward drive position F and the reverse drive position R, and when the neutral switch 17 detects this operation, the main clutch C
When the main clutch switch 30 detects that the planting clutch B has been disengaged, when the planting clutch switch 31 detects that the planting clutch B is in the disengaged state with the automatic deceleration switch 35 being on (deceleration (When a signal is input), as shown in FIG. 9, the control device 36 stores the shift position of the continuously variable transmission V at that timing in a memory (not shown).
In addition to memorizing, the speed change motor 23 is driven in the deceleration direction and the speed change operation is performed until the speed change position measured by the speed change sensor 27 reaches a preset low speed position (# 201 to # 2).
(05 step), after that, when it is determined by the signal from the neutral switch 17 that the shift lever 13 has been set to any shift position beyond the neutral position, or that the main clutch C has reached the engaged state. Is determined by the signal from the main clutch switch 30 or when the signal from the planting clutch switch 31 indicates that the planting clutch B has been switched to the on state (step # 206). The control operation is set so that the gear shift operation is performed until the gear shift position measured by the gear shift sensor 27 is restored to the position stored in the memory by driving 23 in the speed increasing direction (#
Steps 207 to # 209).

The automatic deceleration switch 35 operates in conjunction with the automatic disengagement operation of the planting clutch B when the seedling planting device A is raised by operating the forcible lifting lever 12 to the raising position U. And the forced lifting lever 1 after the seedling planting device A is raised in this manner.
2 is operated to the lowering position D to lower the seedling planting device A, and when the forced elevating lever 12 is again operated to the lowering position D to engage the planting clutch B, the engaging operation is interlocked. It is used to perform the operation of restoring the traveling speed to the original speed.

As described above, in the present invention, the single speed change lever 1 is used.
It is possible to change the traveling direction of the machine body between forward and backward by operating 3 in the front-rear direction, and it is possible to increase or decrease the traveling speed by operating in the up-down direction with the shift lever 13 set to the forward drive position F. Therefore, these gear shifting operations can be performed by simple operations. Also, when switching the traveling direction of the aircraft between forward and reverse, it is possible to mechanically switch the gear transmission system by operating a relatively large stroke, and when performing acceleration / deceleration without difficulty in the operation system. Since the continuously variable transmission V is electrically operated, the operation stroke is not only required to be small, but also the continuously variable transmission V is shifted for the operation time, so that an arbitrary speed can be obtained by adjusting the operation time. Becomes In particular, at the time of this gear shift, the gear position is changed to the gear shift display portion 33
It can be visually grasped via.

[Other Embodiments] In addition to the above embodiments, the present invention can be implemented, for example, by forming the speed increasing position downward and the speed reducing position upward.

In the present invention, the gear shifting operation during gear shifting is shown in FIG.
As shown in the flowchart of FIG. 3, the shift signal from the speed increasing switch 15 or the speed reducing switch 16 is transmitted to the control device 3
If the input signal is input to No. 6, only when the input signal continues for a relatively short time of less than 1 second, such as 0.5 seconds, for the purpose of avoiding a gear shift operation due to an erroneous operation (# 301 ~ # 303 step), the drive of the shift motor 23 is started corresponding to the shift direction, and the shift sensor 2
The gear shift operation is performed by the gear shift amount determined based on the signal from No. 7 to stop the drive of the gear shift motor 23 (# 30
4, step # 305) It is also possible to set the control operation. By setting the shift operation in this way, for example, when increasing the speed, by repeatedly operating the speed change lever 13 to the increasing position IN, the speed is increased stepwise.

[0025]

Therefore, the speed change operation structure that enables the forward / backward switching and the traveling speed switching of the machine body by a simple operation of a single operating tool has been rationally constructed (claim 1). Further, the combination of the mechanical speed change system and the electric speed change system makes it possible to smoothly switch between forward and backward movement and continuously change the forward speed (claim 2).

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

[Figure 1] Overall side view of rice transplanter

FIG. 2 is a side view of the front part of the machine body.

FIG. 3 is a side view of a shift lever operation path.

FIG. 4 is a plan view of the panel surface.

FIG. 5 is a side view of a steering handle portion.

FIG. 6 is a plan view of an operation path of a lifting lever.

FIG. 7 is a block circuit diagram of a control system.

FIG. 8 is a flowchart of a shift motor drive routine.

FIG. 9 is a flowchart of an automatic deceleration routine.

FIG. 10 is a flowchart of a variable speed motor driving routine according to another embodiment.

[Explanation of symbols]

 3 Airframe 13 Gear change operation tool F Forward position R Reverse position V Continuously variable transmission IN Speed up position DE Speed down position

Claims (2)

[Claims] 1. A forward position (F) for advancing the airframe (3).
And an operation path of the speed change operation tool (13) which is switchable to a reverse position (R) for moving the machine body (3) backward.
A speed change operation structure in which an operation path is formed from the forward drive position (F) to a speed increasing position (IN) branched in two directions different from the forward / backward speed change operation path and a deceleration position (DE). 2. A gear-type forward / reverse transmission (E) is used when the shift operation tool (13) is operated between a forward drive position (F) and a reverse drive position (R). ) Is provided with a mechanical operation system for operating the shift operation tool (13) to the acceleration position (IN) or the deceleration position (DE), the operation to this position is performed. 2. The shift operation structure according to claim 1, further comprising an electric operation system that shifts the continuously variable transmission (V) only in accordance with the number of times of electrically detecting and operating or the number of times of operating. .