JPS5921601Y2 - Side drive type rotary case - Google Patents

Description

[Detailed description of the invention] The present invention has one end side of the claw shaft fitted into bearings attached to both sides of a rotary case made of sheet metal, and one end side of the claw shaft 5 is supported by two bearings. The present invention relates to a side drive type rotary case, in which a lid body covering the outside of the bearing is provided on the outer surface of the rotary case on the opposite side to the protruding direction of the claw shaft, and a protective cover is further provided to cover the lower surface of the rotary case.

Conventionally, in this type of rotary case, both bearings are inserted from one side of the rotary case, and the bearing on the opposite side to the protruding direction of the pawl shaft is prevented from being pulled out of the case by the boss part of the bearing. This is done by fitting a ring stopper into an annular groove formed on the inner surface, and to prevent mud from entering the bearing from the outside, a lid that covers the outside of the bearing is separately attached to the case. Furthermore, a protective cover that protects the bottom surface of the case is also attached separately.

Therefore, according to such a conventional structure, it is necessary to form a groove for fitting the ring stopper on the inner surface of the boss portion of the bearing, or to attach the lid body and the protective cover separately to the rotary case, which requires machining and processing. Requires assembly effort.

Furthermore, since the protective cover is attached to the lower surface of the rotary case by welding, if the protective cover becomes worn and damaged, the entire rotary case must be replaced, which is uneconomical.

Therefore, it is conceivable to attach the protective cover by providing a boss portion on the rotary case and attaching the protective cover with bolts, but this does not solve the problem of processing and assembly.

The present invention aims to eliminate the above-mentioned drawbacks through simple structural improvements.

The characteristic structure of the side drive type rotary case of the present invention is that the lid that covers the outside of the bearing has a pull-out stop that comes into contact with the outer race of the bearing to prevent the bearing from being pulled out outward. and a protective cover that covers the lower surface of the rotary case is integrally connected to the lid, and the lid and the protective cover are integrally formed.
In order to externally support the bearing, it is fixed via a bolt to the end face of a partially thickened boss portion, and this configuration provides the following effects.

In other words, since the lid body that covers the outside of the bearing has the function of preventing the bearing from being removed, a separate ring stopper is not required, and a protective cover that covers the bottom surface of the case is integrally connected to the lid body. Therefore, the boss part for attaching the lid body can be used as the boss part for attaching the protective cover, and the boss part for attaching the protective cover is no longer required, and the boss part can be welded to the rotary case made of sheet metal. It is possible to reduce thermal strain during installation and prevent deformation of the rotary case.

Furthermore, since the cover, which is formed integrally with the lid body and the protective cover, is fixed to the boss portion that supports the bearing, for example,
By bolting the bolts near the opening of the case, compared to the flange that joins the half-split case parts, that is, bolting to the outer edge of the case, the airtightness can be improved. It has the advantage of preventing oil leakage inside.

Embodiments of the present invention will be described below based on illustrative drawings.

To configure the agricultural tractor, a removable side drive rotary tiller 3 is connected to the rear of the vehicle body 1 via a swing link mechanism 2, and a rear transmission 4 of the vehicle body 1 is connected to the rear transmission 4 of the vehicle body 1.
A rotary case 6 attached to the tilling device 3 and supporting the pawl shaft 5 in a protruding manner on one side is interlocked and connected via a transmission shaft 7.

One end of the claw shaft 5 of the tilling device 3 is connected to a rotary case 6.
The other end is supported by a holding frame (not shown).

The end of the claw shaft 5 on the rotary case 6 side is provided with bearings 8, 8 on both sides of the rotary case 6 formed of sheet metal.
A boss part 13.13, which is partially thick-walled, is fixed to support the external part, and is stably supported by two bearings 8, 8 fitted inside this boss part 13.13. .

On the outer surface of the rotary case 6 opposite to the direction in which the pawl shaft 5 protrudes, there is a pull-out hole that comes into contact with the outer race 8a of the bearing 8 and prevents the bearing 8 from being pulled out outward. A lid body 10, which is provided with a stopper part 10a and configured to close the opening 9 for attaching and detaching the bearing 8, and a protective cover 11 that protects the lower surface of the rotary case 6 are integrated. A cover 12 having a similar shape is attached to the outer end surface of the boss portion 13 that supports the bearing 8 via bolts 14.

[Brief explanation of the drawing]

The drawings show an embodiment of the side drive type rotary case according to the present invention, in which Fig. 1 is an overall side view of an agricultural tractor, Fig. 2 is a sectional view of the main parts, and Fig. 3 is a perspective view of the lid body and cover. be. 5...Claw shaft, 6...Case, 8...
...Bearing, 9...Opening, 10...
Lid body, 10 a... Removal stop part, 11...
...Protective cover, 12...Cover, 13...
...Boss part, 14...Bolt.

Claims (1)

[Scope of utility model registration request] One end side of the pawl shaft 5 is fitted into bearings 8, 8 attached to both sides of a rotary case 6 made of sheet metal, and the one end side of the pawl shaft 5 is supported by the two bearings 8, 8, and the pawl shaft 5 is supported by the two bearings 8, 8. 5. A side drive type rotary case in which a lid 10 covering the outside of the bearing 8 is provided on the outer surface of the rotary case 6 opposite to the protruding direction, and a protective cover 11 is further provided to cover the lower surface of the rotary case 6. A lid body 1 that covers the outside of the bearing 8
0 is formed with a pull-out stop portion 10a that comes into contact with the outer race 8a of the bearing 8 to prevent the bearing 8 from being pulled out outward, and the rotary case 6 is attached to the lid 10.
A protective cover 11 that covers the lower surface of the housing is integrally provided, and a cover 12 that is integrally formed with the lid body 10 and the protective cover 11 is partially thick-walled in order to externally support the bearing 8. A side drive type rotary case, characterized in that the case is fixed to the end face of a boss portion 13 formed by a bolt 14.