JP2000066752A - Attaching structure of operation lever - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the attachment of an operation lever for operating an auxiliary control valve. SOLUTION: An opening part 55 is formed on a floor sheet 22 and an attaching part 56 for freely attachably and detachably attaching a lever supporting base 47 is provided on the inner side of the opening part 55. Then, in the state of supporting the supporting part 45 of the operation lever 39 at the lever supporting base 47, the lever supporting base 47 is attached from the outside of a cover member 22 through the opening part 55 to the attaching part 56.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a mounting structure of an operation lever for operating an auxiliary control valve for controlling a hydraulic device of a working machine mounted on a tractor.

[0002]

2. Description of the Related Art A tractor has an auxiliary control valve for supplying hydraulic oil to a hydraulic device of a working machine mounted on a vehicle body to control the hydraulic device, and an operating lever for operating the valve. Is provided.

[0003]

The supporting portion of the operating lever is rotatably mounted and supported on a support shaft, and the supporting portion and the auxiliary control valve are interlocked and connected by an interlocking mechanism. The spool of the auxiliary control valve is pushed and pulled, and the support portion is disposed inside a cover member such as a floor sheet that covers the vehicle body, and the operation portion protrudes outside the floor seat, so that mounting is troublesome. In particular, a plurality of auxiliary control valves are provided,
Since a plurality of operation levers are provided in response to this, the installation is troublesome.

[0004] In view of the above problems, the present invention has been made to facilitate the mounting of the operation lever.

[0005]

The technical measures taken by the present invention to solve the above-mentioned technical problem include a cover member 22.
An opening 55 is formed in the opening 55, and a mounting portion 56 to which the lever support 47 is detachably attached is provided inside the opening 55, and the support 4 of the operation lever 39 is provided on the lever support 47.
5 while supporting the lever support 47 with the cover member 2.
2 is mounted on the mounting portion 56 from the outside through the opening 55.

A support shaft 49 is provided on the lever support 47, and the support portion 4 of the plurality of operation levers 39 is provided on the support shaft 49.
It is also characterized in that it is configured to rotatably support 5.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 shows a rear part of a two-axis four-wheel tractor having a pair of left and right front and rear wheels, and a vehicle body 5 of the tractor is constructed by connecting a transmission case 7 to a rear part of a mounted engine via a clutch housing. ing.

A hydraulic lifting device 10 having left and right lift arms 9 is mounted on the rear upper surface of the tractor body 5 (mission case 7), and a work machine mounted by a three-point link mechanism can be lifted and lowered. . Rear wheels 4 are provided on the left and right sides of the rear of the tractor body 5, and the left and right rear wheels 4 are covered by rear wheel fenders 13 erected inside the rear wheels 4, respectively. The driver's seat 14 is arranged between the left and right rear wheel fenders 13,
A steering handle 15 is provided in front of the driver's seat 14.

The head portion 10A of the hydraulic elevating device 10 is covered from above with a floor sheet 22 (cover member), and a driver's seat 14 is mounted on the floor sheet 22 above the hydraulic elevating device 10. This tractor has a canopy (shade) 74 that is a lopes, and a pair of columns 75 of the canopy 74 are provided behind the driver's seat 14 on the left and right sides, and the external hydraulic pressure take-out device 1 is provided between the pair of left and right columns 75. Have been.

This external hydraulic take-out device 1 is a hydraulic lift device 1
A plurality of auxiliary control valves 35 for taking out an external hydraulic pressure are mounted on a mounting base 33A formed on the rear upper surface side of a cast hydraulic housing 33 which is mounted on the hydraulic hydraulic elevating device 10 and constitutes an outer case of the hydraulic elevating device 10. In the illustrated example, three hydraulic pressure devices (transmission oil in the transmission case 7) from a hydraulic pump mounted on the tractor are supplied to the hydraulic housing 33 through the auxiliary control valves 35. Or an oil passage for returning hydraulic oil from the hydraulic device to the transmission case 7 via each auxiliary control valve 35 is formed.

The auxiliary control valve 35
Can be attached by one or two. In the present embodiment, the auxiliary control valve 35 is constituted by a direct-acting spool-type 4-port 3-position switching valve. As shown in FIGS. A connecting portion 35A formed of a quick coupler or the like is provided, and can be connected to a hydraulic device such as a hydraulic cylinder provided in a working machine via the hydraulic hose.

The spool 3 of the auxiliary control valve 35
Reference numeral 6 protrudes to the outside, and a swing lever 37 is interlockedly connected to the projecting portion. The swing of the swing lever 37 pushes / pulls the spool 36, and the push / pull operation of the spool 36 causes a pressure on hydraulic equipment to be increased. The configuration is such that the supply side and the return side of the oil are switched, or the supply of the pressure oil to the hydraulic device is stopped.

As shown in FIGS. 1 to 6, the swing lever 37 of the auxiliary control valve 35 is connected to an operation lever 39 disposed on the front side (right side) of the driver's seat 14 via an operation wire 38. The swing lever 37 is swingably operated by the operating lever 39, so that the auxiliary control valve 35 is
It can be remotely controlled from the driver's seat 14.

The operation wire 38 includes an inner wire 38A,
And an outer wire 38B through which the inner wire 38A is slidably inserted in the axial direction.
One end of B is fixed to a bracket 40 provided on the auxiliary control valve 35, and the other end of the outer wire 38B is mounted and fixed on a mounting portion 41 provided on the side (right side) of the hydraulic housing 33. It is attached and fixed to a bracket 42.

The bracket 42 can fix a plurality of (three) operation wires 38.
A plurality of (three) attachment parts are provided. One end of the inner wire 38A is connected (pivoted) to the swing lever 37, and the other end of the inner wire 38A is connected (pivoted) to the arm 43 provided on the operation lever 39 via the joint fitting 34. I have.

The operating lever 39 includes a cylindrical boss 45 (supporting portion) at the base of the lever main body 44 and a lever main body 4.
At the tip of 4, a detachable grip 46 is provided,
The main configuration is such that the arm 43 is fixed to the boss 45. Each operation lever 39 is attached to a lever support base 47 by a support shaft 49.
The operating lever 3 is rotatably supported via
By rotating the shaft 9 around the axis of the support shaft 49, the swing lever 37 of the auxiliary control valve 35 is swung by the inner wire 38A, and the spool 36 is pushed and pulled.

The lever support base 47 is made of a plate material, and is provided with a pair of support walls 4 that are opposed to each other and are spaced apart in the left-right direction.
7A and a connecting wall 4 connecting the rear end sides of the left and right supporting walls 47A.
7B and an attached wall 47C extending outward in the left-right direction from the front end of each support wall 47A. Support holes 48 are formed through the left and right support walls 47A, and support shafts 49 in the left and right directions are inserted and supported in the support holes 48. The support shafts 49 are provided with boss portions 45 of the operation lever 39.
Is externally fitted via a bush 50 so that the operation lever 39 is rotatably supported on the support shaft 49 (in other words, the operation lever 39 is supported on the lever support 47 by the shaft of the support shaft 49). Supported rotatably around the center).

The support shaft 49 has an engagement groove 51 on which a retaining ring can be mounted. The retaining ring mounted on the engaging groove 51 allows the boss portion 45 of each operation lever 39 to move in the axial direction. The movement of the control lever 39 is regulated so that it is positioned at a predetermined position.
Only one book or two books can be attached to the support shaft 49.

A retaining member 52 made of a plate material is fixed to one end of the support shaft 49. After the support shaft 49 is inserted from the other end into one support hole 48, the support shaft 49 is inserted into the support shaft 49 at the other end. The boss portion 45 of the operation lever 39 is fitted from the outside, and then the other end of the support shaft 49 is inserted into the other support hole 48, and the retaining member 5
2 and the retaining member 52 is fixed to the support wall 47A by a bolt 54 that passes through the support wall 47A and is screwed to a nut member 53 fixed to the inner surface side (opposed surface side) of the support wall 47A. The support shaft 49 and the operation lever 39 are configured to be attached to the lever support 47.

On the other hand, the step portion of the floor seat 22 is lower than the portion where the driver's seat 14 is provided, and the front portion of the hydraulic device 10 of the floor seat 22 is a vertical wall. An opening 55 is formed on one side (right side) of the vertical wall 22A. The opening 55 is formed so that the lever support 47 can be inserted from the front side with the support shaft 49 and the operation lever 39 attached to the lever support 47. The opening 55
On both left and right sides inside the floor sheet 22, stays 56 (mounting portions) whose upper and lower sides are fixed to the inner surface side of the vertical wall portion 22 </ b> A of the floor sheet 22 are arranged.

The stay 56 has a mounting wall 56A on which the mounting wall 47C of the lever support 47 can be overlapped from the front side. The mounting wall 47C and the mounting wall 56
A, and the lever support 47 is attached to the stay 56 from the front side by a bolt 57 screwed into a nut 58 fixed to the rear side of the mounting wall 56A while being inserted into the stay A. With the operation lever 39 attached to the lever support 47, the lever support 47 can be inserted and removed through the opening 55, and the lever support 47 can be attached to and detached from the stay 56.

Outside the opening 55, the opening 55
Is provided. The cover 59 is attached to the vertical wall portion 22A of the floor sheet 22 by bolts 60 from the front side, and each operating lever 39
A guide groove 61 through which the lever body 44 is inserted is formed. In addition, an inspection port 62 is formed at the lower part of the vertical wall portion 22A of the floor sheet 22 in the left-right direction in the left and right direction. The inspection port 62 is openably and closably closed by an opening / closing cover. The operation lever 39 can be connected to the arm 43.

In the above configuration, the operation lever 3
9 to the lever support 47 and the floor sheet 22
The lever support table 47 can be taken out through the opening 55 in a state where the operation lever 39 is assembled at the time of maintenance or when the operation lever 47 is additionally attached. So it is very convenient.

[0024]

According to the present invention, the support portion 45 of the operation lever 39 is mounted and supported on the lever support base 47 outside the cover member 22, and in this state, the lever support base 47 is mounted via the opening 55. By attaching and fixing the control lever 56, the operation lever 39 can be easily attached.

A support shaft 49 provided on the lever support table 47
By supporting the support portions 45 of the plurality of operation levers 39, the plurality of operation levers 39 can be easily attached together.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a mounting structure of an operation lever.

FIG. 2 is a plan sectional view of a main part.

FIG. 3 is a side view of a main part.

FIG. 4 is a side view of a rear portion of the tractor.

FIG. 5 is a plan view of an operation side surface of the auxiliary control valve.

FIG. 6 is a side view of the operation side of the auxiliary control valve.

[Explanation of symbols]

 22 Floor sheet (cover member) 39 Operation lever 45 Boss (support) 47 Lever support 55 Opening 56 Stay (mounting) 49 Support shaft

Claims (2)

[Claims] An opening (55) is formed in the cover member (22), and a lever support (4) is provided inside the opening (55).
7) is provided with an attachment portion (56) to be detachably attached, and the lever support base (4) is supported with the support section (45) of the operation lever (39) supported by the lever support base (47).
7) A mounting structure for an operation lever, wherein the mounting lever is configured to be mounted on the mounting portion (56) from the outside of the cover member (22) through an opening (55). 2. A support shaft (49) is provided on a lever support (47), and a plurality of operation levers (39) are mounted on the support shaft (49).
The mounting structure for an operation lever according to claim 1, wherein the supporting portion (45) is rotatably supported.