JP2001219755A - Button switch device of operation lever for running vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shift-up button 44 and a shift-down button 45 operating a hydraulic transmission mechanism on an operation lever 4 and provide a partitioning means 46 necessitating the transfer in near and remote directions for the operation lever 4 between the shift up button 44 and the shift down button 45 at the time of finger transfer from one button to the other button. SOLUTION: It is possible to more accurately know each position and distinction of the buttons 44, 45 by touch feeling of a finger and direction of travel by necessitating finger transfer in the near and remote directions for the operation lever to prevent erroneous operation securely.

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 for a traveling vehicle such as a tractor.

[0002]

2. Description of the Related Art For example, in an agricultural tractor provided with a hydraulic transmission mechanism in a transmission, a shift operation can be performed without using a clutch. Therefore, an operation lever for operating a mechanical transmission mechanism is provided with an upshift button and a downshift button. There is one in which two button switches are provided so that all the speed change operations can be performed with one hand.

[0003]

The two button switches, the upshift button and the downshift button, are vertically adjacent to each other and are distinguished from each other. However, in tractor work, the worker faces rearward. Therefore, there is a possibility that an erroneous operation is performed only by distinguishing the upper and lower sides. An important object of the present invention is to provide a partitioning means between a shift-up button and a shift-down button provided on an operation lever, so that the shift-up button and the shift-down button can be moved not only to the upper and lower fingers but also to the operation lever. On the other hand, the finger movement in the near and far directions is also required, so that erroneous operation can be prevented.

[0004] Another object of the present invention is to form the partition means with a projection that protrudes larger than the button surface.
It is intended to prevent erroneous operation by going over the projection. Still another object of the present invention is to prevent the erroneous operation of the partitioning means by changing the height of the shift-up button and the shift-down button.

[0005]

The first concrete means for solving the problems of the present invention is a shift-up button 44 and a shift-down button 4 for operating the hydraulic transmission mechanism 12.
5. The button switch device of the operating lever for a traveling vehicle provided with the operating lever 4 and the operating lever 4.
4 is provided between the shift down button 45 and the shift down button 45, with a partitioning means 46 that requires a shift in the direction of the operation lever 4 in the near and far directions for the finger shift from one button to the other button.

A second concrete means for solving the problem in the present invention is that the partition means 46 is provided with a shift-up button 4
4 and the shift down button 45 are projections 47 protruding more than their surfaces. A third specific means for solving the problem in the present invention is that the partitioning means 46 has the shift-up button 44 and the shift-down button 45 arranged in steps with different projecting heights.

[0007]

When the operating lever 4 is rotated back and forth, the mechanical transmission mechanism 2 is switched between high and low, and when the shift up button 44 and the shift down button 45 provided on the grip are selectively pressed by a finger, The speed change operation of the hydraulic transmission mechanism 12 is performed in a plurality of stages. Shift up button 4 of operation lever 4
A partition means 46 is provided between the shift button 4 and the downshift button 45.
Is provided, and when the finger is placed on one button, it also comes into contact with the partition means 46, and when the finger is transferred from one button to the other button, not only does the finger move up and down,
It is necessary to shift the operation lever 4 in the perspective direction, so that the operator can feel by touch whether the finger is in a position to operate the shift up button 44 or the shift down button 45.

[0008]

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, in which a vehicle body 22 is formed by an engine, a transmission case, and the like, and a cabin 23 is mounted on an 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, 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 the hydraulic oil supplied to the hydraulic pack of the forward / reverse switching mechanism is controlled by a main clutch control valve 27 so as to move from the neutral state to the forward side or to the forward side. By entering either of the reverse sides, the clutch is turned on and the vehicle is switched between forward and backward, and the clutch is turned off in the neutral state. The hydraulic transmission mechanism 12 has, for example, a main transmission mechanism 28 of four-speed transmission and a first sub transmission mechanism 29 of high / low switching, and the main transmission mechanism 28 is a main transmission control valve 3.
0, and the first subtransmission mechanism 29 can be controlled by the subtransmission control valve 31. The switching of the hydraulic transmission mechanism 12 can be performed even in a non-clutch state where the hydraulic main clutch 14 is not turned off.

The mechanical transmission mechanism 2 constitutes a second sub-transmission mechanism, and is used for switching the height similarly to the first sub-transmission mechanism 29.
It is a mechanical type using a shift gear, and the rotation operation of the operation lever 4 is transmitted to the shifter via the link 3 and the rod 32 and the like. 1 to 3, the operation lever device 1 includes a U-shaped guide plate 6 also serving 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 so as to set the switching position of the operation lever 4 along the rotation direction of the operation lever 4.

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

A push button 38 is fitted into the upper part of the operation 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, for example, 45 °.
This inclined surface is a cam surface, and when the push button 38 is pushed in, the cam member 37 is pushed down, and the guide pin 7 can be moved downward (retreat). The interlocking rod 36, the cam member 37, the push button 38, the spring 39 and the like constitute an operating means 8 for moving the guide pin 7 backward while gripping the operating lever 4. When the operating means 8 is not operated, the spring 39 is used. Accordingly, the push button 38 is urged in the protruding direction, and the guide pin 7 is urged in the advance direction.

An arm 40 projects from a boss of the operation lever 4 fitted to the support shaft 34.
The link 3 is connected to the mechanical transmission mechanism 2 by rotating the operation lever 4 back and forth, for example.
The switching operation can be performed via. Stoppers 41 are integrally formed on the guide plate 6 outside both ends of the guide groove 5. The operation lever 4 is rotatable within the range of both stoppers 41, and the guide pin 7 is The rotation range is also restricted by moving.

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

A switch SC for detecting retreat of the guide pin 7 is provided near the elongated hole 35 of the operation lever 4. This switch SC is connected to the control mechanism 13. The control mechanism 13 has a microcomputer for controlling various valves and the like to required states in response to an input signal and for recognizing a traveling speed state. 4), the main clutch control valve 27 of the hydraulic main clutch 14 is turned off.

Two detection switches SH and SL are provided at a lower portion of the operation lever 4 so as to be opposed to each other, so that the detection switches SH and SL can be selectively contacted with a pin-made operation piece 42 provided on the guide plate 6. Has become. Each of the detection switches SH and SL is connected to the control mechanism 13, and detects whether the mechanical transmission mechanism 2 is switched between high and 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 above the operation lever 4 below the push button 38.
Partition means 46 are formed between 4 and 45.

The shift-up button 44 and the shift-down button 45 are connected to the control mechanism 13 and can control the main transmission control valve 30 and the auxiliary transmission control valve 31.
By pressing the upshift button 44, the speed of the sub transmission mechanism 29 of 8 and high / low is increased from 1 to 8 speeds, and by pressing the downshift button 45, the speed is reduced from 8 speeds to 1 speed. The gears are shifted one step at a time. The partitioning means 46 is a projection 47 formed by greatly projecting a central beam of a button frame 48 on which the buttons 44 and 45 are arranged vertically, and the projection 47 is provided between the buttons 44 and 45 on the surface thereof (push). Surface), the finger protrudes greatly in the direction away from the operation lever 4, so when a 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. There must be.

The shift-up button 44 and the shift-down button 45 are smaller than the operator's finger.
7 can be touched, and it can be sensed by finger feeling which of the buttons 44 and 45 the finger is in contact with and to which side the other button can be operated. FIG. 4 shows a second embodiment of the partition means 46. The partition means 46 has a structure in which a shift-up button 44 and a shift-down button 45 are arranged in a stepped shape having different protruding heights.

That is, the button frame 48 is provided with
9 is formed, and the upper side protrudes larger than the lower side with respect to the step 49 (the positions or the sizes of the buttons 44 and 45 are different), so that the surface of the shift-up button 44 becomes the surface of the shift-down button 45. The operation lever 4
From one button to the other button, the finger must be moved not only in the vertical direction but also in the perspective direction with respect to the operation lever 4. I have. 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. This small projection 50 is also applicable to the above embodiment.

In both of the above embodiments, the shift up button 44 and the shift down button 45 may be arranged upside down or left and right. In the second embodiment, the lower button May be projected from the upper side.
Next, speed control by the operation lever 4 will be described. When the operation lever 8 is actuated by pushing the push button 38 from the neutral position to actuate the operating means 8 and the guide pin 7 is moved backward against the spring 39, the guide pin 7 is disengaged from the neutral engagement concave portion and the operation lever 4 is moved. At the same time, the switch SC detects the retreat of the guide pin 7 and controls the main clutch control valve 27 to turn off the hydraulic main clutch 14.

When the operating lever 4 is turned up or down and moved to the end of the guide groove 5, the mechanical transmission mechanism 2 is switched up or down via the link 3 and the rod 32 and the like. At the same time, the guide pin 7 is engaged with one of the engagement recesses 9H, 9L by the operating means 8, restricting the rotation of the operation lever 4, and detecting the switches SH, S
One of L detects an operation direction of the operation lever 4 and sends an input signal to the control mechanism 13. When the guide pin 7 is engaged with the engagement recesses 9H and 9L, the operation lever 4 is in a state where play is allowed within the range because the engagement recesses 9H and 9L have a wide width W. When the traveling vibration of 21 is transmitted to the operation force transmission system from the mechanical transmission mechanism 2 to the link 3, the operation lever 4 swings, but the engagement recess 9
H, 9L will not leave.

When the operating lever 4 is turned to a switching position in which it is engaged with one of the engaging recesses 9H and 9L, this 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 connected. When the shift-up button 44 or the shift-down button 45 is pressed and operated in this state, the main shift control valve 30 and the sub-shift control valve 31 are controlled by an optimal pressure increasing curve, and the main shift mechanism 28 and the The speed change mechanism 29 is operated in the optimum state from the first gear to the eighth gear. When the operator touches either the shift-up button 44 or the shift-down button 45 with his / her finger while monitoring the rear working state, the operator also touches the partitioning means 46 to sense which button is touching, and to operate. When the button to be changed is changed, the user pushes the necessary button by overcoming the partition means 46.

[0023]

According to the present invention described in detail above, between the shift-up button 44 and the shift-down button 45, when the finger is moved from one button to the other button, the finger is moved in the distance direction with respect to the operation lever 4. Partitioning means 46 that requires a transition
Since the operation lever needs to be moved in the far and near directions with respect to the operation lever, the positions and distinctions of the buttons 44 and 45 can be more accurately known by the feel and the movement direction of the finger, and the erroneous operation can be performed. Can be reliably prevented.

Further, since the partitioning means 46 is a projection 47 protruding from the shift-up button 44 and the shift-down button 45 larger than the surface thereof, when the finger is placed on one of the buttons, the partitioning means 46 also comes into contact with the projection 47. Then, it is possible to know by touching which button is placed in the contact direction, and the configuration can be made simply and easily. Further, since the shift-up button 44 and the shift-down button 45 are arranged in steps with different protruding heights, when a finger is placed on one button, the presence / absence of the button on the other side can be sensed. It is possible to know by touching whether or not the button is placed, and it is possible to simply and easily configure the button.

[Brief description of the 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 tractor speed control device.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operation lever apparatus 2 Mechanical transmission mechanism 4 Operation lever 12 Hydraulic transmission mechanism 13 Control mechanism 14 Hydraulic main clutch 46 Partitioning means 47 Projection 48 Button frame 49 Step

Claims (3)

[Claims] 1. A shift-up button (44) and a shift-down button (45) for operating a hydraulic transmission mechanism (12).
A button switch device for a traveling vehicle operation lever provided on the operation lever (4), wherein a finger from one button to the other button is provided between the upshift button (44) and the downshift button (45). A button switch device for an operating lever for a traveling vehicle, comprising: a partitioning means (46) that requires a shift in a far and near direction with respect to the operating lever (4). 2. The partitioning means (46) is a projection (47) between a shift-up button (44) and a shift-down button (45), which protrudes larger than the surface thereof. Item 2. A button switch device for an operating lever for a traveling vehicle according to Item 1. 3. The partitioning means (46) comprises a shift-up button (44) and a shift-down button (45) arranged in a stepped shape having different protruding heights. Button switch device for operating lever for traveling vehicle.