JPH0828670A - Position detecting device of operation lever in vehicle - Google Patents

Abstract

PURPOSE:To improve the responsiveness by arranging a working arm of a detecting switch to detect the sway operating position of an operation lever in the direction along the moving direction of the working lever, and arranging a contactor of the working arm in the moving range of the working lever to widen the range where the contactor pushes the working lever. CONSTITUTION:When a holding part of a shuttle lever (an operation lever) which is continuously arranged on the upper end of an operation lever shaft is projected outwardly in the right-to-left direction, and a hydraulic shuttle shift is in the neutral position, contactors 18c, 19c of detecting switches 18, 19 on the inner and outer surface sides are abutted on the upper parts of the front part and the rear part of a working lever 17 respectively. The contactors 18c, 19c are located on the moving region of the working lever 17, and the detecting switches 18, 19 are in the OFF condition. When the shuttle lever is, for example, swayed forward, the working lever 17 is turned forward, and the contactor 18c is pushed upward to turn on the detecting switch 18 on the inner surface side and to advance a tractor 1.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In a tractor, a gear transmission is usually adopted as a transmission, and this transmission is provided with a shuttle shift which is a mechanism for switching the tractor between forward and reverse. Then, there is a shuttle lever provided so that the shuttle shift can be operated by swinging the lever to change the rotation direction of the power of the transmission to switch between forward and reverse. In the shuttle shift, a hydraulic shuttle shift for switching between forward and reverse gears with a hydraulic clutch,
There is a gear selection type in which power is connected and disconnected by moving a clutch gear.

In the one using the hydraulic shuttle shift,
A detection switch is provided to detect the swing position of the shuttle lever from the neutral position and control the control valve of the hydraulic clutch for shuttle shift. This detection switch is shown in FIG.
As shown in, the stay 31 is provided to support the shuttle lever shaft 30 that is rotated about the axis by the swing operation of the shuttle lever.

In FIGS. 10 and 11, reference numeral 30 denotes a shuttle lever shaft which is rotated around a vertical axis by a forward / backward swinging operation of the shuttle lever, and an intermediate portion in the vertical direction of the shuttle lever shaft 30 is on the vehicle body side. Stay 3 fixed to
Supported by 1. A boss 32 is externally fitted and fixed to a position above the stay 31 of the shuttle lever shaft 30.
An actuating lever 33 is fixed to the shaft 2 as a protrusion outward in the left-right direction in a direction orthogonal to the axial direction of the shuttle lever axis.

A pair of detection switches 34 and 35 are provided in front of and behind the operating lever 33 with a space from the operating lever 33.
Are arranged, and the detection switches 34 and 35 are connected to the stay 3
It is attached and fixed to a support plate 36 rising from 1. In addition, on the surface of each detection switch 34, 35 facing the operating lever 33, the operating arms 34a, 35a are respectively projected downward from the main body portions 34b, 35b in the facing direction, and the operating arms 34a, 35a. Contacts 34c, 35c are provided on the tip end side of.

Then, as shown in FIG.
Is in the neutral position between the two detection switches 34 and 35, which is the neutral position. By swinging the shuttle lever forward or backward from this neutral position, the shuttle lever shaft 30 rotates about its axis. The actuating lever 33 rotates forward or backward, and the actuating lever 33 pushes the contacts 34c, 35c of the detection switches 34, 35 to connect the forward hydraulic clutch or the reverse hydraulic clutch of the shuttle shift. Then, the tractor is configured to move forward or backward.

Further, in the gear selection type in which the forward / reverse gears of the shuttle shift are moved by moving the clutch gears, a detection for detecting the reverse drive switching position of the shuttle lever to turn on the backward light is detected. A switch is provided, and the mounting structure of this detection switch is similar to that of FIGS. 10 and 11 (in this case, the detection switch is only on the rear side).

[0008]

The above-mentioned detection switch 3
The swinging ranges of the operating arms 34a, 35a of 4, 35 are fixed, and the swinging amount of the shuttle lever is required to be a predetermined swinging amount for reasons such as feeling. In the hydraulic shuttle shift, since the operating arms 34a and 35a of the detection switches 34 and 35 and the operating lever 33 are opposed to each other in the moving direction of the operating lever 33, the operation is performed. The lever 33 has contacts 34c, 3
The range in which 5c is pushed (the range in which the detection switch operates) is narrow, and if the swing amount of the shuttle lever is set to a predetermined amount, the distance between the actuating lever 33 and the contacts 34c, 35c at the neutral position becomes large, and therefore the neutral position There is a problem that the range is large and the responsiveness at the time of forward / reverse switching operation is poor.

Further, even in the case where the detection switch is provided for turning on the backward light, the operation arm of the detection switch and the operation lever are opposed to each other in the moving direction of the operation lever, and the operation lever is If the range in which the contact pushes the contact is narrow, the following problems occur. That is, when the tractor is a cabin-mounted type, the shuttle lever and the shuttle lever shaft are provided in the cabin chamber, the stay is fixedly attached to the cabin side, the shuttle shift is stored in the mission case, and the shuttle lever shaft and the shuttle shift are different from each other. Since the cabin is linked by the interlocking mechanism, and the cabin is supported by the bracket fixed to the tractor vehicle body via the anti-vibration rubber, the tractor vehicle body and the cabin move relative to each other due to the vibration of the tractor vehicle body. ,
The detection switch fixed on the cabin side and the shuttle lever shaft interlockingly connected to the tractor body side move relative to each other.

As described above, when the range in which the operating lever pushes the contact is narrow, there is a problem that the contact of the detection switch may be switched due to the relative movement of the two due to the vibration of the tractor body. Therefore, in view of the above problems, the present invention relates to a constant swing amount of the operation lever,
An object of the present invention is to provide a position detection device for an operation lever in a vehicle, in which the operating lever pushes the contact of the detection switch over a wide range.

[0011]

The technical means taken by the present invention to achieve the above-mentioned object is provided with an operation lever shaft which is rotated around its axis by the swinging operation of the operation lever. An operating lever that protrudes in a direction orthogonal to the axial direction is provided on the lever shaft so as to be integrally rotatable, and a detection switch that comes into contact with the operating lever to detect the swing operation position of the operating lever is provided near the operating lever. The detection switch is provided with a swingable actuating arm having a contact at the tip which is pushed by the actuating lever, and the contact is switched by swinging of the actuating arm. Of the operating lever of the operating lever,
It is arranged in a direction along the moving direction around the axis of the operation lever shaft, and the contact of the operating arm is arranged in a moving region around the axis center of the operating lever shaft of the operating lever.

[0012]

The operation lever shaft is rotated around the axis by the swinging operation of the operation lever, and the operation lever is integrally rotated with the rotation of the operation lever shaft. Is pushed, the operating arm is swung,
The contact is switched by the swing of the operating arm.

At this time, the operating arm of the detection switch is arranged in a direction along the moving direction of the operating lever around the axis of the operating lever, and the contact of the operating arm has the contact of the operating lever. By being arranged in the movement area around the axis of the shaft, the operation arm of the detection switch oscillates only in the amount of withdrawal of the contact from the movement area of the operation lever with respect to the movement of the operation lever. Therefore, it is possible to secure a predetermined amount of movement of the operating lever, that is, the amount of swing of the operating lever, and it is possible to sufficiently set the range in which the operating lever pushes the contact of the detection switch.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a first embodiment, and in FIG. 5, reference numeral 1 is a tractor, and a vehicle body 4 is mainly constituted by directly connecting an engine 2 and a transmission case 3 accommodating a clutch, a gear transmission and the like. . A cabin 5 is mounted on the rear portion of the vehicle body 4, and the cabin 5 includes a vibration isolating rubber 7 on a bracket 6 provided on the vehicle body 4 on both the front, rear, left and right sides.
Is supported through. A handle 8 is provided in the front part of the cabin 5, and a shuttle lever (operation lever) 9 for operating a shuttle shift for switching between forward and reverse movements of the tractor 1 is arranged on the left side of the handle 8. . Further, the tractor 1 employs a hydraulic shuttle shift in which the gears of the gear transmission are switched by a hydraulic clutch in order to switch between forward and reverse.

As shown in FIGS. 1 to 4, the shuttle lever 9 has a grip portion 9a at the upper portion and a mounting cylinder portion 9 at the lower portion.
The mounting cylinder portion 9b is attached and fixed to the upper end portion of a shuttle lever shaft (operation lever shaft) 10 which is arranged in a rearward inclined shape on the left side of the steering post supporting the handle 8. The midway portion of the shuttle lever shaft 10 in the vertical direction is supported by a mounting plate 11 via a self-aligning bearing 12.
The mounting plate 11 is fixed to a support 13 which is fixed to a support body fixed to the cabin body side. Also, the operation lever shaft 1
The lower end of 0 is also supported by the bottom of the cabin 5 via a self-aligning bearing, and the shuttle lever 9 is swingable back and forth around the axis of the shuttle lever shaft 10.

The mounting plate 11 includes a horizontal plate portion 11a arranged orthogonally to the axis of the shuttle lever shaft 10 and an outer end portion of the horizontal plate portion 11a in the left-right direction from above in the axial direction of the shuttle lever shaft. It is formed in an L-shape from the vertical plate portion 11b rising up to the upper side, and the horizontal plate portion 11a is fastened on the support 13 together with the self-aligning bearing 12 by bolts and nuts. Further, a long hole 14 which is long in the front-rear direction orthogonal to the axis of the shuttle lever shaft is formed through the vertical plate portion 11b.

A boss 15 is fitted over the self-aligning bearing 12 in the middle of the shuttle lever shaft 10.
The pin 5 is fixed to the shuttle lever shaft 10 by a pin 16. A cylindrical actuating lever 17 is fixed to the boss 15, and the actuating lever 17 is made to project in a direction orthogonal to the axis of the shuttle lever shaft 10 so that the elongated hole 14 of the vertical plate portion 11b of the mounting plate 11 is formed. It is inserted.

The vertical plate portion 11b of the mounting plate 11 is provided with detection switches 18 and 19 on the inner and outer side surfaces in the left-right direction. Each of the detection switches 18 and 19 is composed of a return type limit switch, and has main bodies 18a and 19a in which a contact mechanism and the like are housed in a case, and a base portion which is pivotally attached to a lower portion of the main bodies 18a and 19a so as to be vertically swingable. It is mainly composed of actuating arms 18b and 19b that actuate the contact mechanism by vertically swinging the lever, and roller-shaped contacts 18c and 19c provided on the tip ends of the actuating arms 18b and 19b.

The detection switch 18 on the inner surface side includes the vertical plate portion 11
It is arranged on the rear side of b and above the elongated hole 14, and is fixedly attached to the vertical plate portion 11b, and the operating arm 18a thereof projects forward in a downwardly inclined shape. The detection switch 19 on the outer surface side is arranged on the front side of the vertical plate portion 11b and above the elongated hole 14 and is fixedly attached to the vertical plate portion 11b, and the operating arm 19a thereof is inclined downward toward the rear. It is projected.

Each detection switch 18, 19 is connected to a control device for controlling the hydraulic clutch of the hydraulic shuttle shift,
When both the detection switches 18 and 19 are off, the hydraulic clutch of the hydraulic shuttle shift is disengaged to be in a neutral state, and when the detection switch 18 on the inner surface side is turned on by swinging its operating arm 18b upward, When hydraulic oil is supplied to the forward side hydraulic clutch of the shuttle shift and the clutch is engaged, the transmission 1 advances, and the detection switch 19 on the outer surface side is turned on by oscillating its operating arm 19b upwards. The hydraulic oil is supplied to the reverse side hydraulic clutch of the shuttle shift, the clutch is connected, and the tractor 1 moves backward.

In the above structure, the shuttle lever 9 is
With the grip portion 9a protruding outward in the left-right direction shown in the rear view of FIG. 4, the hydraulic shuttle shift is in the neutral position, which is the neutral position.
The detection switch 1 on the inner surface side is located at the center in the longitudinal direction of 4
8 is in contact with the upper part of the front side of the operating lever 17, and the contact 19c of the detection switch 19 on the outer surface is in contact with the upper part of the rear side of the operating lever 17,
c and 19c are located in the movement region of the operation lever 17 around the operation lever shaft axis, and the detection switches 18 and 1
Both 9 are off.

When the shuttle lever 9 is swung forward from this neutral position, the actuating lever 17 pivots forward around the axis of the shuttle lever shaft and pushes the contact 18c upward to move the inner detection switch. 18 is turned on, and the tractor 1 advances. When the shuttle lever 9 is swung rearward from the neutral position, the operating lever 17 pivots rearward around the axis of the shuttle lever shaft and pushes the contact 19c upward to move the detection switch 19 on the outer surface side. It is turned on, and the tractor 1 moves backward.

As shown in FIG. 5, air conditioner air outlets 20 are provided in front of and behind the ceiling of the cabin 5.
As shown in FIG. 6, the blow-out port 20 is configured to be expandable and contractible by a bellows type duct, and can be freely changed in direction by being drawn out and extended. In addition,
In the embodiment, the detection switches 18 and 19 are connected to the vertical plate portion 11
Since it is arranged on the inner and outer side surfaces of the b in the left-right direction, it has an advantage that the mounting space is small and it is advantageous in mounting.

7 to 9 show a second embodiment. In this embodiment, the shuttle shift is a gear selection type in which the power is connected and disconnected by moving a clutch gear (shifter). The lower end of 10 is the cabin 5
A rod protruding from the bottom and mounted and supported on the vehicle body 4 side,
Interlockingly connected to an interlocking mechanism 21 composed of links,
The interlocking mechanism 21 is interlocked with the clutch gear of the shuttle shift, and the clutch gear is moved by swinging the shuttle lever 9 back and forth. Further, the forward / backward switching of the tractor 1 can be switched between forward and backward by swinging the shuttle lever 9 from the neutral position to swing forward from the neutral position, and by swinging backward from the neutral position, as in the previous embodiment. 1 is configured to move backward.

Further, in the present embodiment, the detection switch 22 is provided only on the outer surface side of the vertical plate portion 11b of the mounting plate 11, and the main body portion 22a of the detection switch 22 is on the front side of the vertical plate portion 11b. The actuating arm 22b is positioned and fixed above the elongated hole 14, and the actuating arm 22b projects downward from the lower portion of the main body portion 22a in a downwardly inclined shape. Further, the main body portion 22a is connected to a backward light, and when the operation arm 22b is swung upward, the contact is switched and the backward light is turned on.

Therefore, when the shuttle lever 9 is swung from the neutral position to the backward switching position to the rear, the operating lever 17 pushes the contact 22c of the detection switch 22 upward, and the backward light is turned on. The other structure is similar to that of the first embodiment.

[0027]

According to the present invention, an operating lever shaft is provided which is rotated about its axis by the swinging operation of the operating lever, and the operation lever shaft is projected in a direction orthogonal to the axial direction. A lever is provided so that it can rotate integrally, and a detection switch that comes into contact with the operating lever to detect the rocking operation position of the operating lever is provided near this operating lever, and this detection switch is pushed by the operating lever at the tip. In addition to a swingable actuating arm having a contactor, the contact is switched by swinging of the actuating arm.
It is arranged in the direction along the moving direction around the axis of the operating lever, and the contact of this operating arm is placed in the moving area around the axis of the operating lever axis of the operating lever. Therefore, the actuating arm of the detection switch swings only by the amount that the contact moves out of the moving area of the actuating lever, and therefore, the moving amount of the actuating lever, that is, the swinging amount of the operating lever can be secured by a predetermined amount, In addition, the range in which the operating lever pushes the contact of the detection switch can be set sufficiently, and the movement amount of the operating lever is constant, and the range in which the operating lever pushes the contact of the detection switch can be freely set. it can.

As described above, since the range in which the actuating lever pushes the contact of the detection switch can be sufficiently set, the above-mentioned structure is used for the hydraulic clutch to switch the forward and reverse gears of the vehicle. It is equipped with a hydraulic shuttle shift that is used to detect the swinging operation position of the operating lever that performs the switching operation of this hydraulic shuttle shift, thereby making it possible to narrow the neutral range and improve responsiveness. A gear selection type shuttle shift is performed by moving the clutch gear to switch the forward and reverse gears of the vehicle equipped with the cabin via the anti-vibration rubber in order to perform this shuttle shift switching operation.
The operation lever shaft, which is rotated around the axis by the swinging operation of the operation lever provided in the cabin, is linked to the shuttle shift, and the backward movement switching position of the operation lever is detected to turn on the backward light. By adopting this, it is possible to provide a position detection device for an operation lever in which the contact of the detection switch is not easily switched due to the relative displacement between the detection switch and the shuttle lever shaft due to the vibration of the tractor vehicle body.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a first embodiment of the present invention.

FIG. 2 is a side view of a main part of the first embodiment.

FIG. 3 is a plan sectional view of a main part of the first embodiment.

FIG. 4 is a rear view of the main part of the first embodiment.

FIG. 5 is a side view of the tractor.

FIG. 6 is a side view of a blowing device of an air conditioner.

FIG. 7 is a side view of the tractor according to the second embodiment.

FIG. 8 is a side view of a main part of the second embodiment.

FIG. 9 is a plan sectional view of a main part of the second embodiment.

FIG. 10 is a perspective view showing a conventional example.

FIG. 11 is a plan view showing a conventional example.

[Explanation of symbols]

 1 tractor 9 shuttle lever (operation lever) 10 shuttle lever shaft (operation lever shaft) 17 operation lever 18 detection switch 18b operation arm 18c contact 19 detection switch 19b operation arm 19c contact 22 detection switch 22b operation arm 22c contact

Claims (3)

[Claims] 1. An operating lever shaft which is rotated around an axis by swinging the operating lever, and an operating lever which projects in a direction orthogonal to the axial direction is integrally rotatable with the operating lever shaft. A detection switch that comes into contact with the operation lever is provided near the operation lever to detect the swinging operation position of the operation lever, and the detection switch has a contactor that is pushed by the operation lever at the tip. In a structure in which a movable operating arm is provided and contacts are switched by swinging of the operating arm, the operating arm of the detection switch is moved in a direction along the movement direction of the operating lever around the operation lever shaft axis. And the contact of the actuating arm is arranged in a moving region of the actuating lever around the operation lever shaft axis. Apparatus. 2. A hydraulic shuttle shift for switching between forward and reverse gears of a vehicle is provided by a hydraulic clutch, and an operation of swinging an operating lever for switching the hydraulic shuttle shift is rotated about an axis. A lever shaft is provided, and an operating lever protruding in a direction orthogonal to the axial direction is integrally rotatable with the operating lever shaft, and a swinging operation position from the neutral position of the operating lever is provided in the vicinity of the operating lever. A detection switch for contacting the operating lever to detect and connect the hydraulic clutch of the hydraulic shuttle shift is provided, and the detection switch is provided with a swingable operating arm having a contactor which is pushed by the operating lever at the tip. , A structure in which contacts are switched by swinging of the operating arm, the operating arm of the detection switch is connected to the operating lever shaft of the operating lever. Positioning of the operating lever in a vehicle characterized by arranging the contact of the operating arm in a moving region around the operating lever shaft axis while arranging the contact in a direction along the moving direction around the center apparatus. 3. A gear-selecting type shuttle shift for switching between forward and reverse gears of a vehicle having a cabin mounted on a vehicle body through a rubber cushion is provided. In order to perform a switching operation, an operation lever shaft that is turned around an axis by a swing operation of an operation lever provided in the cabin is linked to a shuttle shift and is orthogonal to the operation lever axis in the axis direction. The operating lever protruding in the direction is provided so as to be integrally rotatable, and in the vicinity of this operating lever, there is provided a detection switch that detects the reverse switching position of the operating lever and contacts the operating lever to turn on the backward light. Is equipped with a swingable actuating arm having a contactor that is pushed by an actuating lever at the tip, and the contact is switched by swinging the actuating arm. The operation arm of the detection switch is arranged in a direction along the moving direction of the operation lever around the operation lever shaft center, and the contact of the operation arm is connected to the operation lever shaft center of the operation lever. A position detecting device for an operating lever in a vehicle, which is arranged in a moving area around the operating lever.