JPH0312578Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention covers the upper part of the transmission case with an upper cover, installs a driver's seat on the upper part of the upper cover,
An agricultural tractor, wherein a front cover is removably attached to the front end of the upper cover and the step, and levers extending from the transmission case are projected forward through lever guide holes in the front cover. This invention relates to the structure of the lever operating section.

[Conventional technology]

Generally, in agricultural tractors having the above configuration, maintenance performance is improved by detachably attaching the front cover as described above. Conventionally, the front cover has been attached around its entire circumference to the vehicle body frame, fender side, etc., by means such as tightening bolts (references not listed).

[Problem that the invention attempts to solve]

However, in a structure in which the entire circumference of the front cover is tightened with bolts, etc., all the bolts, etc. must be tightened or removed when attaching or removing the front cover, which is extremely troublesome.

The purpose of the present invention is to provide a structure that allows the front cover to be attached and detached without much effort.

(Means for Solving the Problems) The present invention is characterized in that the front cover is formed wide enough to cover almost the entire width of the gap between the left and right wheel fenders, and the upper end of the front cover is engaged and supported by the front end of the upper cover. In addition, the lower end of the front cover is connected to the rear part of the step by bolts, and its functions and effects are as follows.

[Effect]

In other words, when installing the front cover, set the front cover in the specified mounting position while engaging the upper end of the front cover with the front end of the upper cover, and then bolt the lower end of the front cover to the rear of the step to ensure that the front cover is mounted securely. The cover can be attached and fixed, and when attached, the bolt connection only on the lower end side is released and the front cover is removed, and at the same time the engagement support on the upper end can be released.

[Effect of idea]

Therefore, the connection between the upper end of the front cover and the front end of the upper cover can be performed almost simultaneously with the installation and removal of the front cover, and the wide front cover that closes the gap between the left and right fenders can be firmly installed and fixed. By applying bolt connections only to the lower end of the front cover, which are necessary to connect and disconnect, and which are troublesome to connect and release, the front cover can be attached and detached. With a simple modification, we were able to create a structure that allows the front cover to be attached and removed without much effort.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 5, an engine 2 and a main clutch housing 3 are mounted in a connected state on the front part of a pair of left and right frames 1, a transmission case 4 is connected to the rear part of the frame 1, and the main clutch housing 3 is mounted on the front part of a pair of left and right frames 1. The housing 3 and the transmission case 4 are connected through a transmission shaft 5 so that power can be transmitted therebetween, and a drive shaft 6 protruding left and right from the rear of the transmission case 4 is connected to the rear wheels 7, and , mission case 4
The transmission shaft 8 disposed forward from the front of the vehicle and the differential device 9a of the front wheels 9 are connected to form a traveling drive system. A tower driving section A consisting of a steering handle 10 and a driver's seat 11 is provided in the center of the vehicle body, thereby configuring an agricultural tractor.

As shown in FIGS. 3 and 5, a hydraulic cylinder 12 is provided at the rear of the transmission case 4, and a pair of left and right lift arms 13 are driven to move up and down, and are attached to the rear end of the vehicle body via the lift arms 13. PTO that transmits power to ground work equipment (not shown)
A shaft 14 is provided, and an upper cover 16 is provided to cover the upper part of the case 4 via a frame 15 attached to the upper surface of the transmission case 4, and the driver's seat is mounted on the upper part of the upper cover 4. 11 have been installed.

A step 17 is suspended above the transmission shaft 8, and a front cover 18 is formed to have a wide width extending from the front end of the upper cover 16 to the step 17 and covering approximately the entire width of the gap between the left and right rear wheel fenders. It is attached removably.

That is, as shown in FIGS. 1 to 3, levers extending from the transmission case 4 via respective link mechanisms are inserted into the front surface of the front cover 18 when it is attached to the vehicle body. Holes 18a are formed for lever guides, etc., and the front cover 18 is removed when inspecting or adjusting these levers. In addition, its detachable structure is
The upper end 18b of the front cover 18 is folded back and downward over the entire width, and the lower end 18c is provided with a plurality of bolt insertion holes 18d along the width direction. A recess 16b is formed over the entire width and has a vertical width that allows the upper end 18b of the front cover 18 to fit therein. Further, the rear end 17a of the step 17 is bent upward over the entire width, and bolt insertion holes 17b are bored in the rear end surface so as to be aligned in the width direction with the bolt insertion holes 18d. Nut 19... is attached to the rear.

The front cover 18 is attached to the recess 1.
The upper end 18b of the front cover 18 of 6b is engaged and supported, and the bolts 20 are screwed into the back nuts 19 through the bolt insertion holes 18d and 17b of the front cover 18 and the step 17, respectively. , and then remove the front cover 18 by reversing the procedure.

As shown in FIG. 4, the front cover 18 includes, in order from the left side of the aircraft, a sub-shift lever 21, a two-wheel drive four-wheel drive switching lever 22, a lift arm fixing knob 23,
Rear wheel differential lock pedal 24, PTO gear shift lever 2
5 are disposed so as to protrude forward through the holes 18a for the lever guides, etc.

[Another example]

In addition to the embodiments described above, the present invention is configured such that, for example, a hook-shaped protrusion is formed at the upper end of the front cover, and a hole is formed at the front end of the upper cover, so that the two are fitted and supported. It's good.

[Brief explanation of drawings]

The drawings show an embodiment of the structure of the lever operating part of an agricultural tractor according to the present invention, and Fig. 1 is a vertical cross-sectional end view of the top cover, step, etc. with the front cover removed, and Fig. 2 is a longitudinal sectional view with the front cover attached. Fig. 3 is an exploded perspective view of the front cover part, Fig. 4 is a longitudinal cross-sectional end view of the state
The figure is a front view of the front cover, and Figure 5 is an overall side view of the agricultural tractor. 4...Mission case, 11...Driver's seat,
16...Top cover, 16a...Front end of the top cover,
17...Step, 18...Front cover, 18b...
Upper end of front cover, 18c...lower end of front cover.

Claims (1)

[Scope of utility model registration request] The upper part of the mission case 4 is covered with an upper cover 16, the driver's seat 11 is installed on the upper part of the upper cover 16, the front cover 18 is removably attached to the front end of the upper cover 16 and the step 17, and ,
This is a lever operation part structure of an agricultural tractor in which levers extending from a transmission case 4 are projected forward through a lever guide hole of the front cover 18, and the front cover 18 is located between the left and right wheel fenders. The upper end 18b of the front cover 18 is formed to have a wide width covering substantially the entire width of the interval, and the upper end 18b of the front cover 18 is
A lever operation part structure for an agricultural tractor in which the lower end 18c of the cover 18 is connected to the rear part of the step 17 by bolts.