JPS6332985Y2 - - Google Patents

Description

[Detailed description of the invention] This invention covers the entire drive shaft, driven shaft, and universal joint of the universal joint cover often used for power transmission in industrial machinery, especially for the front wheel drive section of a tractor. This is an idea related to a cover device that covers the entire body.

Some universal joint elastic covers directly cover the joint of the universal joint and rotate at the same time. Since the elastic cover in this case rotates 360 degrees, there is no directionality when attaching it, so there is no chance of an attachment error.

but. As seen in the overall side view of the agricultural tractor in Figure 1, the universal joint elastic cover of the front wheel drive shaft rotates only a few tens of degrees, and the cover itself is angled, giving it directionality. There is.

When installing a universal joint cover with such directionality, the elastic cover can move freely in the rotational direction, so the rotational position cannot be determined during assembly, and the universal joint and cover may interfere with each other during assembly. There was a risk that this would happen.

Conventional universal joint covers for agricultural tractors restrict movement only in the front-back direction, and there is nothing to position them in the rotational direction. The present invention is an improvement on this point.

The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

FIG. 1 is an overall side view of the agricultural tractor.

An engine 2 is housed inside the bonnet 1,
A front axle bracket 3 protrudes forward from the lower side of the engine 2. A front differential case 5 is pivotally supported on the front axle bracket 3 via a center pin 4, and with the front differential case 5 covered with a differential case cover 6, a universal joint cover 7, and an intermediate cover 8, power is transmitted to the front wheels by an internal shaft. Tell 18,18.

A clutch housing 9 is fixed to the rear surface of the engine 2, and a rear axle case 10 is fixed to the rear surface of the clutch housing 9.

A rear axle housing 11 is provided protrudingly from the side surface of the rear axle case 10, and a rear wheel 1 is mounted on rear axles 12, 12 which are pivotally supported on the rear axle housing 11.
Support 3 and 13.

FIG. 2 is a sectional view of the universal joint of the front wheel drive section.

A front wheel drive shaft projects inside the clutch housing 9 at the front of the rear axle case 19, and power is transmitted from the front wheel drive shaft to the intermediate shaft 15 via a universal joint.

Once again, connect the intermediate shaft 15 to the front differential shaft 1.
4, the power is transmitted horizontally via a universal joint 16.

The universal joint 16 is covered with a universal joint cover 7.

The universal joint cover 7 has directionality, and both ends are connected to the front differential shaft 14 and the intermediate shaft 15.
facing the direction of If such a universal joint cover 7 is installed upside down, the universal joint 16 and the cover 7 will interfere with each other and will wear down as they rotate.

Conventionally, only movement of the cover 7 in the front-rear direction was restricted by a protrusion 6a provided on the differential case cover 6 and protrusions 8a and 8b provided on the intermediate cover 8.

In the present invention, four notches 7b and 7a are provided at the front and rear of the universal joint cover 7 to regulate not only the position in the front and back direction but also the rotation direction. After inserting the universal joint cover 7 in the same direction, tighten the bands 26a, 26 around the notches 7a, 7b.
Tighten at b to prevent it from coming off.

FIG. 3 is a side sectional view of the differential case cover. FIG. 4 is a rear view. FIG. 5 is a side sectional view of the intermediate cover. FIG. 6 is a side sectional view of the universal joint cover 7.

The intermediate cover 8 is provided with protrusions 8a and 8b since the universal joint covers 7 and 7 are disposed at the front and rear thereof.

As described above, the present invention provides protrusions on the differential case cover 6 and intermediate cover 8 sides that face the insertion direction of the universal joint cover 7 made of a directional elastic body, and at the corresponding positions of the universal joint cover. Since a notch is provided and the device is tightened and fixed after insertion, the following effects are achieved.

First, since the universal joint cover 7 itself is made of an elastic body, the vertical movement of the front differential case 5 is controlled by the universal joint cover 7.
It can be absorbed by
It is no longer necessary to interpose an elastic body, ring, etc. between the differential case cover 6 and the rigid universal joint cover as in No. 55533.

Second, if you align the protrusion and notch and insert it,
It can be installed in a position that is not eccentric to the positions of the intermediate shaft and front differential shaft, and there is no possibility of installation errors.

Thirdly, the tightening bands 26a, 2 are placed near the notch.
By tightening 6b, the deflection for inserting the universal joint made of an elastic body can be absorbed and tightened by this notch, and the universal joint cover 7, the differential case cover,
This prevents any non-adhesive portion from occurring between the intermediate covers.

Fourthly, when an agricultural tractor travels on rough terrain, vibrations occur between the machine body and the front axle due to the unevenness of the road, and this vibration causes the universal joint cover to gradually loosen and fall. However, even though the rotation caused by this rocking is absorbed by the elastic body and has directionality, there is a risk that the position will shift and come into contact with the universal joint because there is a direction due to the notch and protrusion. There isn't.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the agricultural tractor, Figure 2 is a side sectional view of the universal joint and cover, Figure 3 is a side sectional view of the differential case cover, Figure 4 is a rear view of the differential case cover, and Figure 5. 6 is a side sectional view of the intermediate cover, and FIG. 6 is a side sectional view of the universal joint cover. 6...Differential case cover, 7...Universal joint cover, 8...Intermediate cover, 16...
universal joint.

Claims (1)

[Scope of utility model registration request] Protrusions are provided on the differential case cover 6 and intermediate cover 8 sides to face the direction in which the universal joint cover 7 is inserted, which is made of a directional elastic material, and a notch is provided at the corresponding position on the universal joint cover. A universal joint cover for agricultural tractors that is later tightened and fixed.