JPS6139663Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a balance weight mounting device for a tractor.

For tractor axles that require large torque transmission, when fixing the wheel boss by fitting it in place, if you fix it using only a rotation stopper such as a pin or key, which is a common fixing method, this can break. occurs often. For this reason, the axle is made of a hexagonal or other rectangular cross-section, and the shape of the boss of the wheel is fitted to this shaft so that a large torque can be transmitted. When such tractors are used for agricultural purposes, the rear wheels sink into the paddy field and the front section becomes head-up, making it difficult to drive when performing puddling and other tasks, so a balance weight is attached to the front bumper of the tractor. Make sure to wear it. Further, when performing traction work such as plowing, it is desirable to apply a large load to the rear wheels in order to obtain a large tractive force, so a balance weight is attached to the rear wheel axle. However, since this rear wheel axle has a rectangular cross section as mentioned above, there are two types of rear wheel weights that are attached to this rear wheel axle and bumper weights that are attached to the bumper. Since it was necessary to prepare them, it was troublesome to manage them, and the work of attaching and detaching them was troublesome.

The purpose of this invention is to solve the above-mentioned problems, and instead of having to prepare two types of balance weights with different attachment points, it is possible to replace one type of balance weight between the bumper stay and the rear axle. An object of the present invention is to provide a balance weight mounting device for a tractor that can be installed in a tractor.

A balance weight mounting device for a tractor according to the present invention which achieves the above object has a stay formed in the same cross-sectional shape as the rear axle protruding from the front of a tractor having a rear axle in a square cross section, and a stay at the front end of the stay. The present invention is characterized in that the bumper is removably attached, and a balance weight, which also serves as a wheel weight and is fitted and fixed to the rear axle, is fitted and fixed to the stay.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below with reference to embodiments shown in the drawings.

FIG. 1 is a side view of a tractor equipped with a balance weight mounting device according to the present invention, FIG. 2 is a plan view of the front part of the engine frame as viewed from arrow A in FIG. 1, and FIG. FIG. 3 is a front view of the bumper portion as seen from the arrows.

In FIGS. 1 and 2, 1 is an engine, 2 is a steering wheel, 3 is a rear wheel, and 4 is a rear axle with a hexagonal cross section to which the rear wheel 3 is mounted. A balance weight 9 is attached to the rear axle 4 as will be described in detail later.
is installed. Reference numeral 5 designates an engine frame, and stays 6 made of hexagonal pipes having the same outer shape as the cross section of the rear axle 4 are fixedly installed on the left and right sides of the front of the engine frame.
It is fitted through a. This bumper 7 is detachably attached to the stay 6 by inserting a pin 10 through a hole provided in the boss 7a and a hole provided in the stay 6. 8 is the front wheel.

4 and 5 show a balance weight 9 according to the present invention, in which a protrusion 91 is provided on one side.
and has a hole 92 bored toward the protrusion 91 on the other side. A hexagonal hole 91 a that can fit into the rear axle 4 and stay 6 having a hexagonal cross section is provided in the center of the protrusion 91 so as to communicate with the hole 92 . A pin hole 91b is provided so as to penetrate from one outer surface of the protrusion 91 to the other outer surface through the hole 91a. Further, two recesses 92a are provided in the hole 92 at positions corresponding to the pin holes 91b so as to be symmetrical about the axis. Further, the outer diameter d ₁ of the protrusion 91 is the hole 92
The protruding length _{l 1 of} the protruding portion 91 is slightly smaller than the depth l ₂ of the hole 92. Therefore, when a plurality of such balance weights 9 are prepared, their protrusions 91 are fitted into the holes 92 of other balance weights, so that they can be connected multiple times.

6 and 7 show the state in which the above-mentioned balance weight 9 is attached to the stay 6 having a hexagonal cross section in front of the engine frame 5 for purposes such as plowing.

When installing, first install the boss 7a of the bumper 7.
and the stay 6.
, and remove the bumper 7 from the stay 6. Next, the balance weight 9 is inserted into the tip of both stays 6 from the hole 92, and at the stopped position, the pin 11 is inserted so as to pass through the pin hole 91b and the hole of the stay 6, and is moved in the axial direction. Fix it to prevent it from happening. After fixing the previous balance weight 9, insert the next balance weight 9 in the same direction and push it in so that its hole 92 fits into the protrusion 91 of the previous balance weight 9.
Similarly to the above, the pin 11 is inserted into the pin hole 91b to fix movement in the axial direction. At this time, the upper and lower ends of the pin 11 of the first balance weight 9 are accommodated in the recess 92a of the next balance weight 9. After the required number of balance weights 9 have been attached in this way, the bumper 7 is again fixed to the tip of the stay 6 via the boss 7a with the pin 10.

8 and 9 show the above-mentioned balance weight 9 mounted on the rear axle 4 for towing work or the like.

The rear wheel 3 has its disc wheel 3a fixed integrally to an axle hub 13 by bolts 14, and this axle hub 13 is fitted to the rear axle 4 of hexagonal cross section so as to rotate integrally, and movement in the axial direction is prevented by a pin 15. It is fixed so that it does not occur. The balance weight 9 may be attached to the rear axle 4 having the hexagonal cross section provided with the rear wheel 3 from its tip in the same manner as to the stay 6 described above. Each time the balance weight 9 is attached, the movement in the axial direction is fixed by a pin 12, and the upper and lower ends of the pin 12 are accommodated in the recesses 92a in the hole 92 of the balance weight 9 to be attached next. For the pin 12 of the last balance weight 9, insert the retaining pin into the small hole at the end of the pin 12, and then
Make sure to prevent it from falling out.

According to the above-mentioned balance weight mounting device,
Since the axle 4 of the rear wheel and the stay 6 of the bumper in front of the engine frame 5 are both formed to have the same external cross-sectional shape, the wheel weight that is fitted and fixed to the rear axle 4 is fitted and fixed to the stay 6 of the bumper. It can also be used as a bumper weight, and there is no need to prepare two types of balance weights with different mounting parts as in the past. Therefore, it is easy to manage and the work of attaching and detaching it is facilitated. Furthermore, if the pin used to prevent the balance weight from moving in the axial direction is constructed so that it can be simply inserted and removed, as in the embodiment, the attachment and removal work can be done without tools, making it even easier. be able to.

In the embodiment, the stays 6 protruding from the front of the engine frame 5 are provided on the left and right sides, but there may be one stay 6 in the center, or three or more stays may be provided.

As described above, the balance weight mounting device for a tractor according to the present invention has a stay formed in the same cross-sectional shape as the rear axle protruding from the front of a tractor having a rear axle with a square cross section, and a bumper attached to the front end of this stay. In addition to being removably mounted, the stay is configured to fit and fix a balance weight that doubles as a wheel weight that is fitted and fixed to the rear axle, so the wheel weight that is fitted and fixed to the rear axle can be attached to the bumper stay. Since it can be used as a balance weight that can be inserted and fixed, there is no need to prepare two types of balance weights with different mounting parts as in the past, and the front-back balance of the aircraft can be adjusted with one type of balance weight. This makes it possible to manage the balance weight extremely easily.

[Brief explanation of the drawing]

FIG. 1 is a side view of a tractor equipped with a balance weight mounting device according to the present invention, FIG. 2 is a plan view of the front part of the engine frame as viewed from arrow A in FIG. 1, and FIG. Fig. 4 is a side view of the balance weight used in the present invention, Fig. 5 is a sectional view taken along line C-C in Fig. 4, and Fig. 6 is a front view of the bumper section as seen from the arrow. 7 is a view along the line D-D in FIG. 6, FIG. 8 is a vertical sectional view showing the balance weight attached to the rear axle, and FIG. 9 is a plan view showing the balance weight attached to the rear axle. FIG. 3... Rear wheel, 4... Rear axle, 5... Engine frame, 6... Stay, 7... Bumper, 7a...
…Boss, 8…Front wheel, 9…Balance weight,
10, 11, 12...pin.

Claims (1)

[Scope of utility model registration request] A stay formed in the same cross-sectional shape as the rear axle is protruded from the front of a tractor having a rear axle in a square cross section, a bumper is removably attached to the front end of the stay, and the stay is fitted into the rear axle. A balance weight mounting device for a tractor, characterized in that a balance weight that also serves as a wheel weight to be fixed is fitted and fixed.