JPS6336993B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention provides a tractor cabin that is configured to release the rotation of the tractor cabin during maintenance and inspection of the tractor, exposing the upper part of the transmission case to facilitate repair and inspection operations. The invention relates to a tilt mechanism.

(b) Prior Art Conventionally, the technology of making it possible to tilt and rotate the cabin of a tractor for repair and inspection has been known to the public.

For example, Japanese Patent Application Laid-Open No. 136661/1983.

(c) Problems to be Solved by the Invention The present invention solves the problem that, in the conventional cabin tilt mechanism, the rotation fulcrum is located at a position far behind and at a high position, far away from the position of the rear axle case. When the cabin is tilted and rotated for this reason, if the tractor is placed on a sloped road, the weight of the tilted cabin causes the entire tractor to fall backwards.

In order to improve this point, the present invention provides a special structure for the rotation fulcrum 15, the main frames 1L and 1R, and the rear axle housing 8.

In particular, since the weight of the entire cabin is applied to the rotational fulcrum, the rotational fulcrum is easily damaged, so the aim is to insert anti-vibration rubber 34, 34 in this part to maintain strength and reduce vibration. That is.

(d) Means for Solving the Problems The objects of the present invention are as described above, and the structure for achieving the objects will now be explained.

In a configuration in which the tractor cabin can be tilted rearward for repair inspection, the tractor-side rotation supports 3a and 3b of the cabin are arranged overlappingly directly above the rear axle housings 8, 8, and the A main frame 1L that connects the rear end of the fender 2 integrally molded with the cabin and the rear axle housing 8 with the rotation pivot shafts 36, 36;
It is provided at the lower end of 1R.

In another embodiment, a vibration isolating rubber 34 is interposed in a rotational pivot portion constituted by a pivot shaft 36 and the main frame 1.

(E) Embodiment The object and structure of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

FIG. 1 is an overall side view of the cabin, and FIG. 2 is a rear view of the cabin.

The main framework of the cabin is constructed as follows.

Main frames 1L and 1R protrude from above the rear axle housing 8 to the rear end of the ceiling frame 22. The ceiling frame is a square frame with several reinforcing bars on the left and right.

Fenders 2L, 2R protrude forward from the main frames 1L, 1R, and the fenders 2L, 2R
The cabin frames 12L and 12R are connected to the upper ceiling frame 22 from the upper surface.

The front part of the cabin is composed of a front frame 28 and a dash board 11. Datsushi board 1
1 is attached with a steering handle 10, and is also attached with a brake pedal, a clutch pedal, etc., and the entire cabin can be tilted and rotated with these attached.

A door 9 opens and closes a side surface surrounded by the ceiling frame 22, the cabin frame 12, the front part of the fender 2, and the front frame. 29 is the door hinge.

An opening/closing window 6 having a curved surface in a right angle direction is provided at the corner of the cabin over the top and rear surfaces of the fenders 2L and 2R. Hinge 3 of opening/closing window 6
0,30 are provided on the cabin frame.

18L, 18R are cabin frames 12L, 1
This is a rearview mirror that protrudes laterally from 2R.

The rear surface of the cabin is provided with a rear upper window 5 and a rear lower window 4, and the upper and lower windows 4 and 5 are constructed as windows that can be opened left and right.

The front part of the cabin has vertical anti-vibration rubber 25,2
5 is interposed and the cabin is placed on it. Both left and right sides have the same shape. Reference numeral 24 denotes a cabin mounting table, which is fixed to the side wall of the clutch housing 32 by a flange 23.

Reference numeral 26 denotes an auxiliary step, which is fixed to a step that is integrated with the cabin, so that when the entire cabin is rotated, the auxiliary step also rises.

As seen in the left half of Figure 2, move the lever bracket 15 inward from the fenders 2L and 2R.
is box-shaped and protrudes. The rotation shaft of the operating lever is pivotally supported by this lever bracket from the transmission case 31 or rear axle case 7 side, and the lever is projected toward the lever guide plate 14. The lever guide plate 14 is fixed to the floor panel 33.

The floor panel 33 is spanned between the fenders 2L and 2R, and the seat 13 is placed in a recess in the center. Electric circuit wiring 1 on the back side of Fender 3L
9 is arranged, and a fixing plate 20 prevents the wiring from hanging down.

Further, the wiring 19 from the fender 2L enters into the cabin frame 12, and a switch board 17 is provided inside the cabin frame 12, on which electrical circuit switches are arranged.

Also on the back side of the Fender 2R, four cold water and two hot water pipings 16 are arranged. These pipings 16 also pass through the right side cabin frame 12R and are connected to a cooler fin device and a heater fin device provided on the ceiling of the cabin.

The main parts of the cabin tilt device are supports 3a, 3
b, and pivot points at the lower ends of the main frames 1L and 1R.

Main frames 1L and 1R are Fender 2
It is a support frame that supports and connects the rear ends of L and 2R and the rear axle housing 8, and has sufficient strength.

The pivot shaft 36 of the present invention is arranged at the lower end of the main frames 1L, 1R, and
It is pivotally connected to a and 3b.

Both supports 3a and 3b are configured in an L shape,
They are stacked and placed on the rear axle housing 8 and fixed with long bolts. The rear axle housing 8 projects laterally from the rear axle case 7.

A pivot shaft 36 is installed between the supports 3a, 3b, and vibration-proof rubbers 34, 34 are interposed between the pivot shaft 36 and the main frame 1. Anti-vibration rubber 25, 25 at the front end of the cabin, and anti-vibration rubber 3 at this pivot point
The cabin, step, floor panel 33, etc. are supported by the four sets 6, 36, and do not contact the clutch housing 32, transmission case 31, rear axle case 7, rear axle housing 8, etc. Also, as shown in FIG. 1, the tilt lock 27 is moved rearward from the support 3a.
protrudes, and the tilt lock 28, which also protrudes from the main frame 1, overlaps in the tilted state, so insert the lock pin in this state,
It is configured to maintain the tilt lock state. 21
is a reflector.

(F) Effects of the Invention Since the present invention is configured as described above, it has the following effects.

First, since the pivot for tilt rotation is located at the rearmost position of the cabin, the rotation range of the front end of the cabin can be increased, and even if the full weight of the cabin is placed on this part, the axle will not move. This prevents the aircraft from losing balance and rolling backwards.

Second, since the cabin-side rotation fulcrum is provided at the lower end of the main frame of the cabin, even if the full weight of the cabin is piled up on this pivot point, it can be supported by the main frame, which has solid strength. It is something that can be done.

Thirdly, as stated in claim 2,
Since the vibration isolating rubber is interposed in the pivot shaft, the vibration isolating effect can be increased by fitting the vibration isolating rubber around the pivot shaft.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of the cabin, and FIG. 2 is a rear view of the cabin. 1...Mainframe, 2...Fender, 3
... Support body, 34 ... Vibration-proof rubber, 36 ... Pivot shaft.

Claims (1)

[Scope of Claims] 1. In a configuration in which the tractor cabin can be tilted rearward for repair and inspection, the tractor-side rotation supports 3a, 3b of the cabin are placed directly above the rear axle housings 8, 8. Duplicate placement,
The main frame 1 connects the rear end of the fender 2, which is integrally molded with the cabin, to the rear axle housing 8.
A cabin tilt mechanism characterized by being provided at the lower end of L and 1R. 2. The cabin tilt mechanism according to claim 1, characterized in that a vibration isolating rubber 34 is interposed in the rotational pivot portion constituted by the pivot shaft 36 and the main frame 1.