JPH0444435Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an operating lever support device for a tractor such as a hydraulic system.

(Prior art) In order to improve the operability of a tractor, various operating levers such as a gear shift lever and a clutch operating lever are provided near the driver's seat. Usually, each operating lever is located between the driver's seat and the rear wheel fender. It is located between the vertical part and is swingable in the front and rear directions.
The operating lever has a base that is swingably supported by a support bracket attached to the vehicle body.

(Problems to be solved by the invention) However, according to the above structure, a special support bracket for supporting the operating lever is required, and it must be assembled in a narrow space between the driver's seat and the rear wheel fender. , the assembly work was troublesome.

Therefore, in view of the above problems, the present invention aims to reduce the number of parts and facilitate assembly.

(Means for Solving the Problem) The technical means is to provide a pivot between the driver's seat 6 of the tractor and the vertical surface of the rear wheel fender 4 using a support shaft 35 so as to be able to swing freely in the front and rear directions. A support shaft body 35 that passes through the vertical surface of the rear wheel fender 4 in the horizontal direction and protrudes inward from the vertical surface of the rear wheel fender 4 in a cantilevered manner. A nut 37 for fixing the support shaft 35 to the vertical surface of the rear wheel fender 4 by sandwiching the vertical surface of the rear wheel fender 4 from both inside and outside sides is screwed onto the support shaft 35. The boss portion 34 of the operating lever 19 is fitted onto the inward protruding portion of the shaft body 35 so as to be relatively rotatable, and the boss portion 34
The abutting surface of the nut 37 that comes into contact with the boss part 34 is formed to have a smaller diameter than the outer diameter of the boss part 34.

(Function) According to the present invention, the support shaft body 35 is directly fixed to the vertical surface of the rear wheel fender 4 by being sandwiched from both sides,
The base of the operating lever 19 may be relatively rotatably supported by the support shaft 35, and the assembly work is easy. Further, since the support shaft 35 is directly fixed using the rear wheel fender 4, a dedicated mounting bracket is not required.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings. In Figs. 1 and 2, 1 is a tractor body, which is formed by directly connecting an engine, a clutch housing, a transmission case 2, etc. has been
A hydraulic device 3 for lifting and lowering a working machine is mounted on the rear upper part of the transmission case 2.

At the rear of the vehicle body 1, there are provided a pair of left and right rear wheel fenders 4 that cover the rear wheels, a fuel tank 5 and a driver's seat 6 that are arranged between the left and right rear wheel fenders 4.

The fuel tank 5 is attached to the hydraulic system 3 by a fixed tank support 7 and a connecting member 8 connecting the upper parts of the left and right rear wheel fenders 4, and the height of the driver's seat 6 can be adjusted freely. The support mechanism 9 supports the vehicle body 1 so that its front and rear positions can be adjusted freely.
It is supported via a support frame 13 fixed to , and its rear part is supported via a support frame (not shown).

Reference numeral 10 denotes a transmission stand disposed in front of the hydraulic system 3, with a main gear shift lever 11 protruding in front of the driver's seat 6, and in front of this transmission stand 10 is a PTO clutch valve that turns on and off the PTO system hydraulic clutch. 12
is located.

A lever guide 15 is fixed to the driver's seat side of the vertical part of the right fender 4 via bolts 16, and it controls a position lever 17 and a draft lever 18 for operating the hydraulic device 3, and a PTO clutch valve 12. A PTO operating lever 19 to be operated is guided.

Similarly, an operating lever support 20 is fixed to the side surface of the right fender 4 via bolts 21, and support shafts 22, 23 fixed to this operating lever support 20 are fixed to the side surface of the right fender 4.
A position arm 24 and a draft arm 25 are pivotally supported via.

A position lever 17 is fixed to the position arm 24, and the front end of the rod 27 is connected, and the rear end of the rod 27 is connected to a control lever 29 fixed to a position control shaft 28 protruding from the hydraulic device 3. connected.

Further, a draft lever 18 is fixed to the draft arm 25, and the front end of a rod 30 is connected thereto, and the rear end of this rod 30 is connected to a control lever 32 of a draft valve 31 disposed on the right side of the hydraulic device 3. ing.

The support shafts 22 and 23 are the operating lever support 2
0, and are also arranged to be distributed to the left and right sides of the support 20. The position arm 24 is disposed closer to the fender 4 and to the rear than the draft arm 25, and the position lever 17 is longer than the draft lever 18, making it easier to operate the frequently used position lever 17. It's improving.

The PTO operating lever 19 is arranged at the rear of the position lever 17 and the like, and a boss portion 34 at its base is fitted onto a support shaft 35 directly fixed to the vertical surface of the fender 4 so as to be relatively rotatable. It is said that it can be freely swung forward and backward. The support shaft 35 has an outer end that passes through the vertical surface of the fender 4 in the horizontal direction and projects inward from the vertical surface of the fender 4, and has a pair of shafts screwed onto the support shaft 35. Natsu 37
is tightened by sandwiching the vertical surface of the fender 4 from both the inside and outside sides via a flat washer 36, and the support shaft 35 protrudes inward from the vertical surface of the fender 4 in a cantilevered manner and is fixed here. has been done.

Furthermore, the contact surface of the inner nut 37 that contacts the boss portion 34 of the operating lever 19 has a smaller diameter than the outer diameter of the boss portion 34, thereby reducing frictional resistance when the operating lever 19 rotates. I try to keep it small.

In addition, 38 is a bushing, 39 is a flat washer, and 40 is a split pin for preventing removal.

The upper end of a rod 42 is connected to an arm 41 projecting from the boss portion 34 of the PTO operating lever 19, and the lower end of this rod 42 is connected to a first arm portion 44 of a link member 43.

45 is a link support fixed to the right fender 4, and a pivot 46 protruding from this link support 45.
The link member 43 is pivotally supported, and a tension spring 49 is tensioned between a pin 47 protruding from the link support 45 and a pin 48 protruding from the first arm portion 44 .

A rear end of an inclined rod 51 is connected to the second arm portion 50 of the link member 43. This inclined rod 51 is inclined forward from the vicinity of the right fender 4 so as to approach the center of the vehicle body 1, and its front end extends to the vicinity of the spool 52 of the PTO clutch valve 12 located approximately in the center of the vehicle body 1. It is set up.
The spool 52 and the inclined rod 51 are connected to the vertical axis 53.
The vertical shaft 53 is connected to a bracket 5 fixed to the valve 12.
It is pivoted on 6.

Ball joints are provided at both ends of each of the rods 27, 30, 42, and 51 to allow for some twisting.

In the rear position of the PTO operating lever 19 in the state shown in FIG. 2, the PTO hydraulic clutch is in the on state. Then, as shown by the imaginary line, by swinging the PTO operating lever 19 forward, the PTO hydraulic clutch is turned off. At this time, the tension spring 49 tensioned between the pins 47 and 48 acts in an unstable manner to maintain the PTO operating lever 19 in the on or off state.

The embodiment of the present invention is constructed as described above, and the support shaft 35 supporting the PTO operating lever 19 is
Since it is directly fixed using the vertical surface of the fender 4, there is no need for a dedicated mounting bracket, and the number of parts can be reduced. In addition, it is only necessary to attach the support shaft 35 to the vertical surface of the fender 4 in a pinched manner from both sides, and to pivot the boss portion 34 of the operating lever 19 to the support shaft 35, which simplifies the assembly work. Assembly time can be shortened. Furthermore, since the support shaft body 35 is directly attached to the vertical surface of the fender 4, a large amount of attachment width is not required, and it can be effectively attached in a narrow space.

3 and 4 show the structure of the gear shift lever, 59 is a main gear shift lever, and concave first and second shift levers are formed facing each other on first and second shift arms 60 and 61 on both sides. It is arranged between the engaging parts 62 and 63.

Reference numeral 64 denotes a fulcrum shaft, which is pivotally supported on the vehicle body 1 side such as the transmission case 2.
Operating barrels 65 and 66 are fitted onto the outside, and the base of the first shift arm 60 is fixed to the first operating barrel 65, and the base of the second shift arm 61 is fixed to the second operating barrel 66. Further, the fulcrum shaft 64 and the second operating barrel 66 are connected and integrated by a fixing pin 67, and the second operating barrel 66 is rotated in the same direction as the fulcrum shaft 64, and the fulcrum shaft 64 and the first operating barrel 65 are It is said to be relatively rotatable.

Shift levers 68 and 69 for operating a shift fork are integrally provided at the ends of the first operating barrel 65 and the fulcrum shaft 64, respectively.

A lever mounting portion 70 is located between the first speed change arm 60 and the second speed change arm 61 and protrudes from the outer circumferential surface of the second operating barrel 66. One end is fastened with a bolt 72. As shown by the imaginary line in FIG. 3, the leaf spring 71 allows elastic deformation in the left and right direction,
No deformation is allowed in the front-back direction. Also, the leaf spring 71
The base of the main shift lever 59 is pivotally connected to the other end by a support shaft 73 such as a bolt, pin, or pipe knob, and the lever 59 is rotatable back and forth around the support shaft 73.

When operating the main shift lever 59, the main shift lever 59 is swung to the left or right against the elastic force of the leaf spring 71, as shown by the imaginary line in FIG. When the rotating operation is performed, the first shift arm 60 or the second shift arm 61 is selectively operated. Further, the main shift lever 59 is returned to the central neutral position by the elastic action of the leaf spring 71.

FIG. 5 shows another gear shift lever structure, in which a rotating cylinder 74 is supported on a fulcrum shaft 64 so as to be relatively rotatable.
A lever mounting portion 70 is provided protruding from the lever mounting portion 70 , a leaf spring 71 is fastened to the lever mounting portion 70 by a bolt 72 , and a base portion of the main shift lever 59 is fastened to the other end of the leaf spring 71 by a bolt 75 .

In addition, in the above embodiment, the PTO operating lever 1
9 is shown, but other operating levers may be used, and the invention is not limited to that of the embodiment.

(Effects of the invention) According to the invention, since the support body 35 is directly attached to the rear wheel feeder 4 in a cantilevered manner, there is no need for any special mounting bracket, which simplifies the structure and reduces the number of parts. .

Furthermore, since the support shaft 35 is fixed to the vertical surface of the rear wheel fender 4 by a nut 37 that pinches the vertical surface from both the inside and outside sides, the support shaft 35 is fixed only by tightening this nut 37. This facilitates the assembly work, and the inner nut 37 acts as a spacer between the boss portion 34 and the fender 4.
Damage to the rear wheel fender 4 due to rotation of the operating lever 19 can be prevented.

Furthermore, since the contact surface of the nut 37 that contacts the boss portion 34 is made smaller in diameter than the outer diameter of the boss portion 34, the frictional resistance between the boss portion 34 and the nut 37 can be made as small as possible, and the operating lever 19 The operability can be further improved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part showing an embodiment of the present invention, Fig. 2 is a side view of the rear part of the tractor, Figs. FIG. 4 is a view taken along the line in FIG. 3, and FIG. 5 is another sectional view of the main part. 4... Rear wheel fender, 6... Driver's seat, 19...
PTO operation lever, 35...Spindle body.

Claims (1)

[Scope of Claim for Utility Model Registration] An operating lever 19 is provided between the driver's seat 6 of the tractor and the elevation of the rear wheel fender 4, which is pivotally supported by a support shaft 34 so as to be swingable in the longitudinal direction. The rear wheel fender 4 is provided with a support shaft 34 that passes through the vertical surface of the rear wheel fender 4 in the horizontal direction and projects inward from the vertical surface of the rear wheel fender 4 in a cantilevered manner. A nut 37 that fixes the support shaft 35 to the vertical surface of the rear wheel fender 4 by sandwiching the vertical surface of the rear wheel fender 4 from both the inside and outside sides is screwed onto the support shaft 35 so that the support shaft 35 protrudes inward. The boss portion 34 of the operation lever 19 is fitted into the portion so as to be relatively rotatable, and the boss portion 34
An operating lever support device for a tractor, characterized in that a contact surface of a nut 37 that comes into contact with the boss portion 34 is formed to have a smaller diameter than the outer diameter of the boss portion 34.