JPS5839041Y2 - Bevel case for driving work equipment - Google Patents

Description

[Detailed description of the invention] This invention constitutes the upper part of a working machine such as a rotary connected to the rear of a tractor, and the PTO of the tractor.
A work machine equipped with a bevel gear mechanism that receives rotational power from the shaft and transmits this rotational power to the rotor, which is the working part of the work machine.

This invention relates to a bevel case for driving.

Such a bevel case for driving a work machine constitutes an upper part of the work machine, and is a strength member that is connected to the tractor via a coupling device such as a 3P'Junk device and bears the tilling reaction force from the work section below. This work equipment must play the role of a transmission case that internally supports a bevel gear mechanism that receives rotational power from the PTO shaft and transmits it to the working part. Since the bevel case is suspended rearward in an overhanging manner, in order to ensure stability when the tractor is traveling during work and to prevent hardening of the field due to reduced tread pressure on the wheels, the bevel case must be installed within a range that does not impair the necessary rigidity. It is necessary to make it as lightweight as possible.

Therefore, in this invention, the bevel case is made of sheet metal, and a spherical part that protrudes into a hemispherical shape is provided at the rear, and a mounting seat is provided on the top of this spherical part for attaching a mast for connecting the work equipment. The spherical part, which is the internal part of the bevel gear mechanism, is made thin by bulging, and the mounting seat provided on the spherical part reinforces the spherical part, ensuring rigidity. It is.

To explain one embodiment, as shown in FIG. 3, the rear part of the bevel case 9 made of sheet metal is shaped roughly into a hemispherical shape, following the outer shape of the large bevel gear 10 that is internally supported by the bevel case 9. The spherical portion 9a is formed by bulge molding into the spherical portion 9a.
A mounting seat 9b having a gate-like shape when viewed from the rear is formed in the upper part of a, and the cylindrical body 11 is fixed to the mounting seat 9b.

The front end of the bevel case 9 is open, and a shaft support 14 is attached to this front end with bolts, and the shaft of a bevel pinion 13 that meshes with the large bevel gear 10 is supported pivotally by the shaft support 14. .

The pipe frame 1 is placed on the left and right sides of the bevel case 9.
5 and 15 are fixedly installed, and a set plate 4 is fixedly installed on each pipe frame 15.
There is a chain case at the end of the pipe frame 1, and the other pipe frame 1
A side frame is attached to each end of the chain case 5, a rotor serving as a working part is mounted on a shaft at the lower part of the chain case and the side frame, and the rotor is supported on a bevel case 9 and a large bevel tooth 10 is attached. The shaft 8 is connected to the P of the tractor 1.
The rotational power transmitted from the TO shaft to the bevel pinion 13 via the universal joint shaft is transmitted to the rotor via the drive chain inside the chain case.

Then, as shown in Fig. 2, the lower part of the mast 6.6 is attached to the mounting seat 9b by the pin 12 inserted into the cylinder 11, and the lower part is attached to the vertical rods 7, 7 which attach the lower part to the left and right set plates 4, 4. to reinforce the mast 6.6, and as shown in FIG.
are connected by the left and right lower links 2, 2, and the rear upper part of the tractor 1 and the mast 6.6 are connected by the central top link 5.
If the work equipment 3 is connected to the rear of the tractor 1, the lift arm of the lift mechanism of the tractor 1 and the lower links 2, 2 are connected by the left and right lift rods. This working machine 3 is suspended from the rear of the tractor 1 in an overhanging manner.

In the bevel case for driving a working machine according to this invention, the bevel case 9 is formed using sheet metal material as described above, and the spherical part 9a for housing the large bevel gear 10 of the bevel gear mechanism is provided at the rear of the bevel case 9. Because of the bulge formation, the bevel case 9 can be formed into a thin piece with a uniform thickness, and its own weight is extremely light.

Since a mounting seat 9b for attaching the mast 6.6 is provided on the upper part of this spherical part 9a, the upper part of the spherical part 9a is reinforced by this mounting seat 9b and made thin by bulge molding with sheet metal. The rigidity of the bevel case 9 can be maintained sufficiently.

As mentioned above, the bevel case for driving the work machine is
It serves as a strength member that constitutes the upper part of the working machine and is connected to the tractor via a connecting device such as a 3-P IJ link device, thereby reducing the tilling reaction force from the lower working part.
It must serve as a transmission case that internally supports the bevel gear mechanism that receives rotational power from the O-axis and transmits it to the working part, but the work equipment is overhanging to the rear of the tractor. Since the bevel case is suspended, it is necessary to reduce the weight of the bevel case as much as possible in order to ensure stability when the tractor is running and to prevent hardening of the field due to reduced pressure on the wheels.
In this example, weight reduction and rigidity can be achieved by bulging the spherical portion 9a using sheet metal material.In particular, as a result of achieving this weight reduction, it is difficult to overhang the working machine to the rear. This effectively prevents the front wheels of a tractor that is suspended in an upright position from floating up, making it possible to reduce the weight of the tractor itself, and also requiring a balance weight to be loaded on the front of the tractor. By eliminating such waste, the stability of the tractor during driving was improved, and the pressure on the wheels was reduced, making it possible to lessen the hardening of the cultivated land.

[Brief explanation of drawings]

The figures show one embodiment of this invention. Figure 1 is a side view of the rear of the working machine and tractor, Figure 2 is a perspective view of the main parts, Figure 3 is a side view of the bevel case, and Figure 4 is a side view of the rear of the tractor. A-A in Figure 3
FIG. Code explanation, 1...Tractor, 2...Lower link,
3... Work equipment, 4-... Set plate, 5... Top link, 6... Mast, 7... Vertical rod, 8...
・Drive shaft, 9... Bevel case, 9a... Spherical part, 9b... Mounting seat, 10... Large bevel gear, 11.
... Cylindrical body, 12... Pin, 13... Bevel pinion, 14... Shaft support, 15... Pipe frame.

Claims (1)

[Scope of utility model registration request] A bevel case 9 made of sheet metal that pivotally supports a rotary drive shaft 8 is provided with a spherical portion 9a that bulges out into a roughly hemispherical shape at the rear, and a shaft support 14 that pivotally supports a bevel pinion 13 at the front. 1. The large bevel gear 10 attached to the drive shaft 8 is meshed with the bevel pinion 13, a mounting seat 9b is provided on the upper part of the spherical part 9a, and the mast 6.6 is mounted diagonally forward and upward from the mounting seat 9b. A bevel case for driving work equipment made by protruding.