JP3501307B2 - Button switch device for operating lever for traveling vehicle - Google Patents

Abstract

PURPOSE: To surely prevent the erroneous operation by from being taken by requiring a finger movement in near and far directions relative to an operating lever and more precisely knowing the respective positions of and the difference between an up-shift button and a down-shift button in accordance with finger touch and the directions of the finger movement. CONSTITUTION: An operating lever 4 is provided with an up-shift button 44 and a down-shift button 45 which operate a hydraulic transmission mechanism. A partition means 46, which needs a movement in near and far directions relative to the operating lever 4 for the finger movement from one button to the other button, is provided between the up-shift button 44 and the down-shift button 45.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a button switch device for an operating lever of a traveling vehicle such as a tractor.

[0002]

2. Description of the Related Art For example, in an agricultural tractor having a transmission equipped with a hydraulic speed change mechanism, since a shift operation can be performed without a clutch, an operation lever for operating the mechanical speed change mechanism has two shift-up buttons and a shift-down button. There is one that is equipped with two button switches so that all gear shifting operations can be performed with one hand.

[0003]

The two button switches, the shift-up button and the shift-down button, are arranged vertically adjacent to each other to be distinguished from each other. However, in the tractor work, the worker faces rearward. Therefore, there is a possibility that an erroneous operation may be performed only by distinguishing between the upper and lower parts. An important object of the present invention is to provide a partitioning means by a protrusion between the shift up button and the shift down button arranged adjacent to the operation lever so that the shift up button and the shift down button can be moved up and down only by fingers. Instead, it is possible to prevent an erroneous operation by requiring the finger to move in the distance direction with respect to the operation lever.

[0004]

The first concrete means for solving the problems in the present invention is a shift up button 44 and a shift down button 4 for operating the hydraulic transmission 12.
In the button switch device of the operating lever for a traveling vehicle, wherein
The up button 44 and shift down button 45 are
Are arranged vertically adjacent to each other in the frame 48, and
Projections 47 that project the central crosspieces of the frame 48 from their surfaces.
Formed in, the finger shift by the projection 47 from one of the button to the other button, characterized in that it constitutes a partition means 46 which requires the transition direction of access to the operating lever 4 that (Claim 1) .

A second specific means for solving the problem in the present invention is that the shift-up button 44 and the shift-down button 45 are smaller than the operator's finger.
Is characterized in that the at it (claim 2). A third specific means for solving the problem in the present invention is that detection switches SH and SL are provided in the lower part of the operation lever 4 so as to face each other, and the detection switches SH and SL are respectively connected to the control mechanism 13. The mechanical transmission mechanism 2 is configured to detect whether the mechanical transmission mechanism 2 is switched between high and low, based on the input signal (claim 3).

[0006]

When the operating lever 4 is rotated back and forth, the mechanical transmission mechanism 2 is switched between high and low, and this switching is detected by the detection switches SH and SL, and the shift up button 44 and the shift down button 45 provided on the grip portion. By selectively pressing and with the finger, the hydraulic transmission mechanism 12 is operated in a plurality of stages. The shift-up button 44 and the shift-down button 45, which are arranged adjacent to the grip of the operating lever 4, are
The buttons are arranged vertically adjacent to each other in the tongue frame 48, and
A partitioning means 46 constituted by a protrusion 47 formed by a central crosspiece of the frame 48 is provided, and when the finger is placed on one of the buttons, the partitioning means 46 is also brought into contact therewith, and the finger is moved from one button to the other button. At this time, it is necessary not only to move the finger up and down, but also to move the finger in the perspective direction with respect to the operation lever 4, whereby the operator operates the position where the finger operates the shift up button 44 or the shift down button 45. You can feel it by touching it.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 6, reference numeral 21 denotes a tractor exemplified as a traveling vehicle. A vehicle body 22 is formed of an engine, a transmission case, etc., and a cabin 23 is mounted on the upper portion thereof via a cushion. Alternatively, the operation lever device 1 is provided on the inner surface of the side wall of the fender 25. The transmission of the tractor 21 includes a control mechanism 13, a hydraulic main clutch 14, and a hydraulic transmission mechanism 12 as schematically shown in FIG.
And a mechanical transmission mechanism 2 and the like.

The hydraulic main clutch 14 is also used as a forward / reverse switching mechanism, and pressure oil supplied to the hydraulic pack of the forward / reverse switching mechanism is controlled by the main clutch control valve 27 to move from the neutral state to the forward side or to the forward side. By putting in either of the reverse drive side, the clutch is turned on and the forward / reverse drive is switched, and the clutch is turned off in the neutral state. The hydraulic speed change mechanism 12 has, for example, a main speed change mechanism 28 for four-speed speed change and a first auxiliary speed change mechanism 29 for switching the height, and the main speed change mechanism 28 is the main speed change control valve 3.
The first subtransmission mechanism 29 can be controlled by a subtransmission control valve 31. The switching of the hydraulic transmission mechanism 12 can be performed even in a non-clutch state in which the hydraulic main clutch 14 is not turned off.

The mechanical speed change mechanism 2 constitutes a second auxiliary speed change mechanism and is used for switching between high and low like the first auxiliary speed change mechanism 29, but the shift operation means is not hydraulic but a shifter,
It is a mechanical type using a shift gear, and the turning operation of the operation lever 4 is transmitted to the shifter via the link 3, the rod 32, and the like. 1 to 5, an operation lever device 1 includes a guide plate 6 having a U-shape in a front view, which also serves as a support, and an operation lever 4 rotatably supported by a support shaft 34 on the guide plate 6. A guide groove 5 is formed on one side wall of the guide plate 6 along the rotation direction of the operation lever 4 and for setting the switching position of the operation lever 4.

A long hole 35 is formed in the middle of the operation lever 4 in the longitudinal direction thereof. The guide pin 7 is inserted through the long hole 35 so as to be movable in the longitudinal direction. It is inserted in the guide groove 5. Operating lever 4
The interlocking rod 36 is inserted into the inside of the interlocking rod, the guide pin 7 is connected to the lower end of the interlocking rod 36, and the cam member 37 is attached to the upper end of the interlocking rod 36 so that the interlocking rod 36 and the cam member 37 can be operated integrally. It can move up and down in the lever 4, and is biased upward by a spring 39.

A push button 38 is fitted in the upper part of the operating lever 4, and the rear end of the push button 38 and the upper end of the cam member 37 are in contact with each other at an inclined surface of 45 °, for example.
This inclined surface is a cam surface, and by pushing the push button 38, the cam member 37 is pushed down, and the guide pin 7 can be moved downward (backward). The interlocking rod 36, the cam member 37, the push button 38, the spring 39, etc. constitute an operating means 8 for moving the guide pin 7 backward while holding the operating lever 4, and when the operating means 8 is not operated, the spring 39 Thus, the push button 38 is urged in the protruding direction and the guide pin 7 is urged in the advancing direction.

An arm 40 is projected from a boss portion of the operation lever 4 fitted to the support shaft 34.
0 is connected to the link 3, and the mechanical transmission mechanism 2 is connected to the link 3 by rotating the operating lever 4 back and forth, for example.
Switching operation is possible via. Stoppers 41 are integrally formed on the guide plate 6 at both ends of the guide groove 5, and the operating lever 4 is rotatable within the range of both stoppers 41. The range of rotation is also restricted by moving.

The center of the guide groove 5 is the neutral position of the operating lever 4, narrow engaging recesses are formed, both ends are the high / low switching positions, and the engaging recesses 9H, 9 of wide width W are provided.
L is formed so that the guide pin 7 can be engaged by the forward movement of the operation lever 4 in the longitudinal direction. Operating lever 4
Since the tractor 21 is traveling and vibrates when is in the high / low switching position, the engaging recesses 9H and 9L are formed to have a wide width W in order to give the operating lever 4 a large play.

A switch SC for detecting the backward movement of the guide pin 7 is provided near the elongated hole 35 of the operating lever 4. The switch SC is connected to the control mechanism 13. The control mechanism 13 has a microcomputer, which receives various input signals to control various valves and the like to a required state and recognizes a traveling speed state. The switch SC moves the guide pin 7 backward (operation lever). 4), the main clutch control valve 27 of the hydraulic main clutch 14 is turned off.

Further, two detection switches SH and SL are provided at the lower part of the operation lever 4 so as to be opposed to each other, and the detection switches SH and SL provided on the guide plate 6 can be selectively brought into contact with the operation piece 42 made of a pin. Has become. Each of the detection switches SH and SL is connected to a control mechanism 13, detects whether the mechanical transmission mechanism 2 is switched to high or low by an input signal thereof, and adjusts and controls the hydraulic transmission mechanism 12 accordingly. . A shift-up button 44 and a shift-down button 45 for shifting the traveling speed are arranged adjacent to each other below the push button 38 on the upper portion (grasping portion) of the operation lever 4, and between the buttons 44, 45. The partition means 46 is formed in the.

The shift up button 44 and the shift down button 45 are connected to the control mechanism 13 to control the main shift control valve 30 and the sub shift control valve 31, and the main shift mechanism 2 of four stages.
8 and the high and low sub-transmission mechanism 29, a total of 8 speeds, from the 1st speed to the 8th speed by pressing the shift up button 44, and from the 8th speed to the 1st speed by pressing the shift down button 45, Shift gears one by one. The partitioning means 46 is a protrusion 47 formed by largely projecting a central crosspiece of a button frame 48 in which the buttons 44 and 45 are vertically adjacent to each other, and the protrusion 47 is formed between the buttons 44 and 45. Since it largely protrudes from the surface (pushing surface) in the direction away from the operation lever 4, when the finger is moved from one button to the other button, the finger is moved not only in the vertical direction but also in the perspective direction with respect to the operation lever 4. Also has to move.

The shift-up button 44 and the shift-down button 45 are smaller than the operator's finger, and no matter which of the shift-up button 44 and the shift-down button 45 has a finger, the projection 4 of the partition means 46 is provided.
It is possible to sense with the finger feel whether the finger is in contact with which of the buttons 44 and 45 and which button should be operated to operate the other button. FIG. 4 shows a second embodiment of the partitioning means 46. The partitioning means 46 has a structure in which the shift-up button 44 and the shift-down button 45 are arranged in different steps with different projecting heights.

That is, the button frame 48 has a step 4 on the central crosspiece.
9 is formed, and the upper side projects more greatly than the lower side with the step 49 as a boundary (the positions or sizes of the buttons 44 and 45 are different), whereby the surface of the shift-up button 44 is the surface of the shift-down button 45. From the operating lever 4
When the finger is moved from one button to the other button, the finger has to move not only in the vertical direction but also in the perspective direction with respect to the operation lever 4. There is. Further, a small protrusion 50 is formed on the surface of the shift-up button 44 so that the difference between the buttons can be sensed only on the button surface. The small protrusion 50 can be applied to the above-described embodiment.

[0019] Incidentally, in the above both embodiments, the shift-up button 44 and shift-down button 45, Ri was placed upside down, in the second embodiment, may or is projected from the upper the lower button . Next, speed control by the operation lever 4 will be described. When the push button 38 is pushed from the neutral position of the operating lever 4 to activate the actuating means 8 and the guide pin 7 is moved backward against the spring 39, the guide pin 7 is disengaged from the neutral engaging recess and the operating lever 4 is moved. Becomes rotatable, and at the same time, the switch SC detects the backward movement of the guide pin 7, controls the main clutch control valve 27, and turns off the hydraulic main clutch 14.

When the operating lever 4 is rotated to either the high or low position and moved to the end of the guide groove 5, the mechanical speed change mechanism 2 is switched to the high or low position via the link 3 and the rod 32. At the same time, the guide pin 7 is engaged with one of the engaging recesses 9H and 9L by the actuating means 8 to restrict the rotation of the operation lever 4, and the detection switches SH and S.
One of the L's detects the operating direction of the operating lever 4 and sends an input signal to the control mechanism 13. When the guide pin 7 is engaged with the engaging recesses 9H and 9L, the operating lever 4 has a wide width W in the engaging recesses 9H and 9L, so that play is allowed within that range, and the tractor is When the traveling vibration of 21 is transmitted to the operating force transmission system from the mechanical transmission 2 to the link 3, the operating lever 4 swings, but the engaging recess 9
It never leaves H, 9L.

When the operating lever 4 is rotated to the switching position in which one of the engaging recesses 9H and 9L is engaged, it is recognized by the control mechanism 13 and the four-stage main transmission mechanism 28 and the high and low auxiliary transmission mechanism 29 are separated. When the shift-up button 44 or the shift-down button 45 is pushed in the adjustment-controlled state, the main transmission control valve 30 and the sub-transmission control valve 31 are controlled by the optimum boost curve, and the main transmission mechanism 28 and the sub-transmission mechanism 28 are operated. The speed change mechanism 29 is operated in the optimum state from the first speed to the eighth speed. When the operator touches one of the shift-up button 44 and the shift-down button 45 with his / her finger while monitoring the rearward work state, the operator also touches the partition means 46 to sense which button is touched and operate. When changing the button to be operated, the user operates the partition means 46 and pushes the required button.

[0022]

According to the present invention described in detail above, the shift
Up button 44 and shift down button 45 are buttons
The buttons are arranged vertically adjacent to each other in the frame 48, and
The central bars of the frame 48 are provided with the protrusions 47 protruding from their surfaces.
Since the projection 47 forms the partitioning means 46 which requires a transition in the perspective direction with respect to the operation lever 4 for the finger transition from one button to the other button, the protrusion 47 is formed with respect to the operation lever. Since it is necessary to move the finger in the perspective direction, the positions and distinctions of the buttons 44 and 45 can be more accurately known by the feel of the finger and the moving direction, and erroneous operation can be reliably prevented.

The partitioning means 46 also includes a shift-up button 44 and a shift-down button 45 in a button frame 48.
Vertically disposed, since the central crosspiece of the button frame 48 is constituted by projections 47 protruding from their surface, also in contact with the projection 47 places a finger on one of the buttons, placed either button the contact direction It is possible to know the sensation by touch, and it is possible to configure easily and easily.

[Brief description of drawings]

FIG. 1 is a sectional front view showing an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a sectional front view showing a second embodiment of the partition means.

FIG. 5 is a schematic explanatory view showing a speed control device for a tractor.

FIG. 6 is a side view of the rear part of the tractor.

[Explanation of symbols]

1 Operation lever device 2 Mechanical transmission 4 Operation lever 12 Hydraulic transmission 13 Control mechanism 14 Hydraulic main clutch 46 partition means 47 protrusions 48 button frame

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kengo Sato Kengo Sato 64, Ishizukita-cho, Osaka Prefecture Kubota Sakai Plant (56) Reference JP-A-6-206472 (JP, A) JP-A-55- 10721 (JP, A) JP-A-3-89064 (JP, A) Actually open 62-26829 (JP, U) Actually open 2-128867 (JP, U) Actually open 5-26582 (JP, U) Actually open 3-23247 (JP, U) Actually open 1-91924 (JP, U) Actually open 64-21419 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60K 20/00-20/08 F16H 59/00-59/12 G05G 1/00-25/04

Claims (3)

(57) [Claims] Claim: What is claimed is: 1. An operating lever is attached to a grip portion of an operating lever (4).
-Press the push button (38) that enables the turning operation of the (4)
A shift-up button (44) and a shift-down button (4) that are provided and operate the hydraulic transmission mechanism (12)
5) is placed adjacent to the lower side of the push button (38).
And location, and positioned adjacent up and down the shift-up button (44) and the shift-down button (45) and the operating lever (4) button frame provided in the gripping portion (48) within said Shifutoa'
Between the push button (44) and the shift down button (45)
A central crosspiece of the button frame (48) formed in a projection projecting from their surface (47), with respect to the projection finger shifts during operation lever from one of the buttons by (47) to the other button (4) Partitioning means (46) that requires a shift in the perspective direction, and grips the operating lever (4).
Shift up button (44) and shift down button
(45) Which of your fingers is used when pressing and
To detect the touch of the button with your finger,
The protrusion of the partition means (46) regardless of which of the tongues is in contact
Button switch device of the traveling vehicle operating lever, wherein contactable der Rukoto to cause (47). 2. The button switch device for an operating lever for a traveling vehicle according to claim 1, wherein each of the shift up button (44) and the shift down button (45) is smaller than an operator's finger. . 3. A detection switch (SH), (SL) is provided at a lower part of the operation lever (4) in an opposed state, and each detection switch (SH), (SL) is provided in a control mechanism (13). The operation for a traveling vehicle according to claim 1 or 2 , which is connected and is configured to detect whether the mechanical transmission mechanism (2) is switched to high or low by an input signal thereof. Lever button switch device.