JPS5841226B2 - How to tilt the safety cabin on a tractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tractor with a round safety cabin, and in particular, a method for tilting a safety cabin in a tractor that tilts the safety cabin using a hydraulic system mounted on the tractor for driving a working implement. It is related to.

Conventionally, inspection and maintenance of tractors with a safety cabin (hereinafter referred to as "cab"), such as electrical equipment concentrated on the transmission, transmission, hydraulic system, or panels, had to be carried out inside the narrow cab room. Not only is the work efficiency poor, but the range of work is extremely limited, and in some cases the cab must be disassembled and removed. Because it is strongly assembled and consists of heavy parts, it is extremely difficult to disassemble it, and this results in the extra burden of disassembling and reassembling the cab, which is not directly related to the original work. There were many problems such as the above-mentioned inspection and maintenance requiring a great deal of time and effort.

Therefore, in order to solve these problems, as mentioned above, instead of completely removing the cab from the vehicle body, the vehicle body and cab are hinged on one side, like in large trucks, and a special spring is attached to this to tilt the cab. It is also possible to install a large spring, but this requires a large spring with enough elastic force to lift the cab, and there are still problems such as the need for space to accommodate this large spring. is the current situation.

In view of the above-mentioned current situation, and in order to solve the above-mentioned problems, the present invention has been developed by rotatably attaching the lower end of the rear column constituting the cab to a cab mounting column erected on the vehicle body. When tilting the vehicle, connect the lift arm of the hydraulic system mounted on the vehicle body with the lower end of the rear column of the cab by a link, and rotate the lift arm counterclockwise to tilt the vehicle through the link. to tilt the cab by rotating the rear strut of the cab clockwise about the shaft attachment part, and after tilting the cab, connect the lower end of the rear strut of the cab and the cab mounting strut by a top link. The point is that the recab maintains its tilt position.

The present invention will be described below with reference to drawings of embodiments.

A method of tilting a safety cabin of a tractor according to the present invention shown in FIGS. 1 to 5 & a rear column 1 of a safety cabin 9
4 is rotatably attached to a safety cabin mounting column 13 erected on the vehicle body E by a shaft 15, and when the safety cabin 9 is to be tilted, a hydraulic lifting device 8 mounted on the vehicle body E is attached. The lift arm 11 and the lower end of the safety cabin rear column 14 are connected by a link 18, and by rotating the lift arm 17 counterclockwise, the safety cabin rear column 14 is connected via the link 18. , tilts the safety cabin 9 by rotating clockwise around the shaft attachment part 15, and after tilting the safety cabin, the lower end of the rear column 14 and the mounting column 13 are used for attaching a working machine to a tractor. Top links 19
The tilt position of the safety cabin 9 in the tilted state is reliably maintained by connecting the safety cabin 9 with the safety cabin 9.

In this embodiment, as shown in FIG. 2, when tilting the safety cabin 9, first remove bolts 11 and 12, which will be described later, that secure the lower end of the safety column 14 to the fuselage, and then The lower end of the cabin rear column 14 and the lift arm 17 are connected by the link 18, and the lift arm 17 is operated as described above to secure the safety cabin 9.
After tilting the safety cabin, a pin 14e protruding from the inside of the lower end of the safety cabin rear column 14 on the left side in the figure and a pin 13a protruding from the inside of the bottom of the safety cabin mounting column 13 on the left side in the figure. Said top link 19
The tilted position of the safety cabin 9 in the tilted state is maintained by connecting the safety cabin 9 and inserting a retaining pin.

Further, the pin 14e is located between the shaft attachment portion 15 and the tip of the lift arm 11 in FIG. 1, and furthermore, is located in front of a line connecting the two.

The higher the lifting height, the greater the effect, but the fact that the center of gravity of the lifted safety cabin 90 is located behind the rotational fulcrum (shaft attachment part 15) is due to the fact that the hydraulic lifting device 8 of most tractors This is dangerous because pressure can only be applied in the direction of raising the lift arm 17.

Therefore, it is preferable that the center of gravity of the lift arm 17 raised to its maximum position be above or in front of the rotation fulcrum (the shaft attachment part 15).

As shown in FIGS. 1 to 3, the rear column 14 of the safety cabin 9 has a 7-shaped platen N4 at the lower end of the column 14a.
As shown in FIG. 1, the support 14a and the platen 14b are bent forward in a dogleg shape at the fixed part of the support 14a and the platen 14b. It is rotatably attached to the upper part of the safety cabin mounting column 13 with a shaft 15.

The safety cabin 9 and the fender 16 have an integral structure as shown in FIG. 2, and gaps 16a and 14c are formed between the fender side of the fender 16 through which the shaft 150 passes and the bolts 15 on the fender side of the platen 14b, respectively. There is.

A bush 17 is inserted into the contact portion between the safety cabin mounting column 13 and the shaft 15, and the shaft 15 is screwed into a tap 14d formed on the tractor center side of the bracket 14b.

Further, the pins 14e are integrally formed on both the left and right sides of the platen N4b.

A pin 13a having a boss portion on either the left or right side of the safety cabin mounting column 13 or one side is integrally configured, and this pin 13
This is a stopper for keeping the top link 19 approximately vertical when it is set between pins 14e and 13a after boss II of a.

In the figure, reference numeral 1 denotes a tractor engine, a clutch housing 2 is provided behind it, a transmission 3 is attached to the rear of the clutch housing 2, and a rear axle case 4 is attached to both sides of the clutch housing 2.

Further, a steering wheel 5 and a dash panel 6 are provided on the upper part of the clutch housing 2, and a gear shift lever 7 and the hydraulic device 8 are provided on the upper part of the transmission case 3.

The safety cabin 9GL, the base 10 fixed to the lower part of the clutch housing 2, and the rear axle case 4.
are attached by bolts 11 and 12 on the left and right sides, respectively, and are firmly fixed and held at all times.

In short, the present invention is such that the safety cabin is rotatably pivoted from the lower end of the rear column to the safety cabin mounting column installed upright on the vehicle body, and the safety cabin is mounted on the vehicle body when the safety cabin is tilted. a lift arm of a hydraulic system;
By connecting the lower end of the safety cabin rear column with a link and rotating the lift arm counterclockwise, the safety cabin rear column is moved clockwise around the shaft attachment part via the link. Since the safety cabin can be rotated and tilted, the hydraulic system mounted on the vehicle body is originally intended to operate working machines for various agricultural tasks, but this hydraulic system can be used. Since the safety cabin can be tilted extremely easily, it is possible to significantly improve the efficiency of inspection and maintenance of various equipment that could not be expected inside the narrow safety cabin. It does not require a large dedicated spring as the power source like conventional ones.

Further, in the present invention, after the safety cabin is tilted, the lower end of the rear column and the mounting column are connected by a top link that is normally installed on the tractor, so that the tilted position of the safety cabin in the tilted state can be reliably maintained. Therefore, even if you inadvertently come into contact with a hydraulic lifting device, etc. during inspection and maintenance, the cabin will not recover and collapse, causing an accident.
The hydraulic system used for cabin tilt can also be disassembled for inspection and maintenance.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is a side view of a tractor with a safety cabin, Fig. 2 is a rear view, and Fig. 3 is a diagram showing the pivoting portion between the safety cabin mounting column and the safety cabin rear column. FIG. 4 is an explanatory diagram of the safety cabin in a tilted state, and FIG. 5 is a diagram showing the state in which the top link is attached. 8... Hydraulic system, 9... Safety cabin, 13...
Safety cabin mounting support, 14... Safety cabin rear support, 15... Axis, 11... Lift arm, 18...
・Link, 19...Top link.

Claims (1)

[Claims] 1. Slightly above the lower end of the rear column of the safety cabin is rotatably attached to the safety cabin mounting column installed upright on the vehicle body, and when tilting the safety cabin, connect it with the lift arm of the hydraulic system mounted on the vehicle body. , by connecting the lower end of the safety cabin rear column with a link and rotating the lift arm counterclockwise, the safety cabin rear column is moved clockwise around the shaft attachment part via the link. After tilting the safety cabin, the lower end of the rear column and the safety cabin mounting column are connected by a top link to maintain the tilted position of the safety cabin. A method for tilting a safety cabin in a tractor, characterized by: