JPS583690Y2 - Tractor power take-off device - Google Patents

Description

[Detailed description of the invention] When selecting and mounting various types of work equipment on the rear of a tractor as required and extracting power from the tractor's transmission case to drive the work equipment, P, T, 0. (power extraction)
There are times when you want to change the speed of an axis.

However, in the conventional power take-off device, P, T, 0. Since the shaft generally protrudes from the rear of the transmission case and is driven at a fixed transmission ratio, it has been almost impossible to obtain the optimum rotation speed that suits the local situation and type of work.

This invention has P, T, 0. In addition to making the case removable, P, T, 0. This system avoids the above-mentioned conventional problems by making it possible to replace the gears inside the case.
, the outer peripheral flange portion 30 of the case 7 is fastened with a plurality of bolts, and the rear end is supported on the bearing 20 inside the P, T, 0° case 7. The drive shaft 3 is inserted into the first hole 36 of the transmission case 1 through a bearing 21 which is fitted into the first hole 36 of the transmission case 1 so that it can be pulled out rearward, and extended into the transmission case 1 so as to be pulled out. Spline-fit the drive shaft 2,
P, T, 0. P, T, 0. in case T. P on drive shaft 3
,T,0. Fit the drive gear 4 so that it does not rotate relative to each other, and
,T,0. P, T, 0° axis parallel to drive shaft 3 P, T
,0. P, T, 0 on the bearing 25 installed in the case 7
．． An intermediate portion of the shaft 6 is supported by a bearing 25, and P,
T, 0. The shaft 6 is made to protrude rearward, and the front end of the P, T, 0° shaft 6 is supported in the transmission case 1 in a freely removable manner through a bearing 26 that is fitted into the second hole 37 of the transmission case 1 so as to be removable rearward. P, T, 0. P, T, 0. in case T.
On axis 6 are P, T, 0. meshing with the drive gear 4 and P, T,
0. The drive gear 4 has different numbers of teeth P, T, 0. Fit the gear 5 so that it does not rotate relative to each other, and set P, T, 0. Drive shaft 3 and P,
T, O, fitting part 8 with drive gear 4 and P, T, 0° shaft 6
and P, T, 0. By making the shapes of the fitting portions 9 of the gear 5 the same, P, T, O, drive gear 4 and P, T, 0. It is characterized by the fact that the gear 5 can be replaced.

FIG. 1 is a vertical cross-sectional partial view of an agricultural tractor to which the present invention is applied, in which P, T, 0. The drive shaft 2 slightly protrudes backward, and has P, T, 0. The drive shafts 2, 3 are connected via a splined joint tube 12, 13 and an intermediate shaft 14.

The internal splines 15 in the joint tube 12 are fitted with splines 16, 17 on the shaft 2.degree. 14.

18 is a positioning snap ring.

The structure of the spline joint tube 13 portion is also similar to that of the joint tube 12 portion.

P, T, 0. The drive shaft 2 has P, T, 0. Power is transmitted as required by a transmission mechanism (not shown).

P, T, 0. The drive shaft 3 has P, T, 0. A needle bearing 20 attached to the case I, and a ball bearing 2 fitted into the first hole 36 of the transmission case 1 so as to be able to be pulled out rearward.
1 is supported at two points, and the central spline 22 is P, T, 0.
．． The fitting portion 8 meshes with the internal spline 23 of the drive gear 4.
is formed.

P, T, 0. Axis 6 is P, T, 0. It is supported at two points by a bearing 25 attached to the case 7 and a bearing 26 fitted into the second hole 37 of the transmission case 1 so that it can be freely pulled out backwards, and the spline 27 has a gear P having a different number of teeth than the gear 4.
,T,0. The internal splines 28 of the gear 5 mesh with each other to form a fitting portion 9.

Also P, T, 0. P of the part that protrudes backward from case 7
,T,0. The shaft 6 has a spline 2 for connection with the work machine.
9 is the setting.

For P, T, O, case 7, pass the stud bolt 31 through the hole drilled in the surrounding flange 30, and tighten the nut 32 to the transmission case 1.
It is tightened.

Note that 33 is a sticker and 34 is a collar. Since each of the splines 22, 27 and internal splines 23, 28 constituting the illustrated fitting portions 8, 9 have the same shape,
P, T, 0. Drive gear 4 and P, T, 0. The gears 5 are mutually interchangeable.

P, T, 0. Drive gear 4 and P, T, 0. The number of teeth of the gear 5 is P, T, 0. It is preset to be suitable for most operations using the shaft 6, and therefore, if the gears 4 and 5 shown in the figure are equipped as standard, various operations can be carried out in a wide area without any problems. .

Therefore, one or more sets of other gears suitable for use in a particular region or a particular work machine are prepared in advance as optional parts, and all of these gears are equipped with the same shape as the internal spline 23, 28 shown in the figure. Provide internal splines.

If you prepare a separate set of gears with special specifications like this,
Gears can be easily converted on-site.

In other words, when replacing the gear, remove the nut 32,
T, 0. Pull out case 7 to the rear (to the right in the figure).

At that time, the P, T, O, and drive shafts 3 escape from the spline joint tube 13, and the outer races of the ball bearings 21, 26 simultaneously escape from the holes 36, 37 of the transmission 1, and thus the gears 4, 5 The P, T, 0° case 7 with built-in gears is first removed as a unit from the transmission case 1, and then the mounting positions of the illustrated gears 4 and 5 are changed or replaced with another pair of gears selected in advance.

P, T, 0. The work for attaching case 7 to transmission case 1 is the reverse of the above.

The invention can be embodied as described above, and according to the invention, the transmission case 1 is attached to the rear surface of the transmission case 1 at the rear of the tractor.
P, T, 0. Outer flange part 3 of case 7
0 is tightened with a plurality of bolts to make it removable, and P, T, 0. P, T, O of the drive gear 4, the shape of the fitting part 8 for the drive shaft 3, and P, T, 0. Gear 5 P, T
, O, Since the shape of the fitting part 9 with respect to the shaft 6 is the same, it is possible to easily adjust the gear 4 with a different number of teeth according to the request without making any changes to the working machine at the site where the tractor is used.
Exchange ゜5 and get P, T, 0. The rotation speed of the shaft 6 can be changed.

Also, the bearings 21 and 26 are both located in the hole 36 of the transmission case 1,
37 so that it can be pulled out backwards, so when replacing gears 4 and 5 with different numbers of teeth, simply press P, T, 0.
．． By simply removing nuts 32 at multiple locations on the outer periphery of case 7, P, T, 0 with gear 4°5 and shafts 3, 6 built-in.
．． The case 1 can be removed from the transmission case 1 as a unit, and the gears 4 and 5 can be replaced at a location away from the transmission case 1 that is easy to access.P, T, 0. The user can proceed easily and accurately while looking into the case 7.

In that case, the shaft 3 is provided with a bearing 20 at the rear end, and the shaft 6 is provided with a bearing 25 in the middle part, respectively, so that P, T, 0.
Since the shafts 3 and 6 are supported by the case 7, they maintain parallel postures, and when replacing the gears 4 and 5, there is no risk of the shafts 3 and 6 tilting, which not only makes the work easier, but also allows the replacement of the gears 4 and 5. , 5, P, T, 0. Case 7 unit,
When installing to the transmission case 1, the front end of the shaft 3 and the bearing 2
1.26 position is held relatively accurately, making the installation process of the unit easier.

After installing P, T, O, case 7 to transmission case 1,
Shaft 3 is connected to shaft 6 at two points, front and rear, by bearings 20 and 21.
is rigidly supported at two points, the front end and the middle part, by bearings 26 and 25, and the shaft 3.6 is rigidly supported while the work machine is being driven.
There is no risk of tilting or bending, power is transmitted reliably, vibration noise is low, and durability is maintained.

P, T, 0. Since the case 7 has a structure that opens toward the transmission case 1 and has an outer peripheral flange portion 30 around the periphery, it is easy to process. Provides a sturdy support member for 25.

It is also possible to employ serrations, keys, etc. other than splines for the fitting parts 8 and 9.

[Brief explanation of the drawing]

FIG. 1 is a partial longitudinal sectional view of an agricultural tractor to which the present invention is applied. 11...Transmission case, 12,13...
Spline joint pipe, 14... Intermediate shaft.

Claims (1)

[Claims for Utility Model Registration] P and T facing the transmission case 1 at the rear of the transmission case 1.
,0. The outer peripheral flange portion 30 of the case 7 is tightened with a plurality of bolts, and the P, T, 0. P, T, 0.0. The drive shaft 3 is inserted into the first hole 36 of the transmission case 1 through a bearing 21 which is fitted into the first hole 36 of the transmission case 1 so that it can be pulled out rearward, and extended into the transmission case 1 so as to be pulled out. The drive shaft 2 is spline-fitted, and P, T, 0. P, T, 0. in case 7. Drive shaft 3
P, T, 0 on top. The drive gear 4 is fitted so as not to rotate relative to each other, and P, T, O, parallel to the drive shaft 3, P, T, 0. Axis 6 is set to P, T, 0. P, T, 0. The intermediate portion of the shaft 6 is supported by a bearing 25, and P, T, 0. The shaft 6 is made to protrude forward, and the front end of the P, T, 0° shaft 6 is supported in the transmission case 1 so that it can be freely extracted through the bearing 26 that is fitted into the second hole 37 of the transmission case 1 so that it can be extracted rearward. P, T, 0. P, T, 0. in case T. On the shaft 6, P, T, 0° mesh with the drive gear 4 and P, T, 0. P, T, 0. with different numbers of teeth than the drive shaft 4.
Fit the gear 5 so that it does not rotate relative to each other, and set P, T, 0. Drive shaft 3 and P, T, 0. Fitting part 8 with drive gear 4 and P, T
,0. By making the shapes of the shaft 6 and the fitting portion 9 of the P, T, 0° gear 5 the same, P, T, 0. Drive gear 4 and P, T
,0. A power extraction device for a tractor, characterized in that a gear 5 can be replaced.゛