JPS5819063Y2 - Rear PTO kid on tractor - Google Patents

Description

[Detailed explanation of the invention] This invention is a rear PT.
This invention relates to a rear PTO kind that is attached to change the position, shaft dimension, rotation direction, etc. of the O-axis.

Conventionally, the shaft dimensions and rotation direction of the PTO shaft of a tractor are determined by international standards, but riding tillers with power of 13 horsepower or less have a tiller section attached to the main unit, and tend to be dedicated tillers. However, making the PTO shaft conform to international standards would result in a significant increase in cost, so it is common to use a PTO shaft that is designed independently and does not conform to international standards.

Therefore, in order to install a working machine that meets international standards on this cultivator for domestic use, it is necessary to install a rear PTO kid that meets international standards as an option at the rear of the machine.

This rear PTO kind is easy to install and remove, and needs to be small. However, because of its small size, oil lubrication has a small volume and the oil deteriorates quickly, and grease lubrication causes excessive heat generation. Too much.

Also, without a breather, internal pressure would rise due to heat generation, causing oil to leak from the oil seal, and with a breather, oil would gush out from the breather.

The present invention was developed in view of the above circumstances, and the rear P
When the TO Kind is installed on the machine, it is automatically connected to the lubricating oil inside the Rear PTO Kid, which is the lubricating oil inside the □ tension of this machine, making the Rear PTO Kind compact and easy to install. However, it is an object of the present invention to provide a rear PTO kid in which lubrication and pleather function smoothly.

Hereinafter, the present invention will be specifically explained based on embodiments shown in the drawings.

The passenger tractor 1 has an engine 2, front wheels 3, rear wheels 4, and a transmission case 5 located at the rear of the vehicle body.

At the rear end of mission case 5 is a P designed to domestic specifications.
The TO axis 6 is located here.

In addition, a hole 7 is formed in the mission case 5 and opens to the outside of the case below the oil level L in the mission case. A working steel ball 9 is slidably held.

In addition, a small hole 10 is bored on the side of the hole 1.
communicates with mission case 5.

Furthermore, a bushing 12 on which a rubber seal 11 is baked is fitted on the outside of the hole γ, and the bushing constitutes a seat against which a steel ball 9 urged by a spring 8 is brought into close contact.

On the other hand, Susha PTO Kind 20 has two gears 21 and 22, two PTO shafts that meet international standards, three shaft lengths, and a split case 24.
It consists of ゜25.

The gear 21 has a spline hole 26 that matches the spline 6' of the PTO shaft 6 of domestic specifications, and the gear 22 has two PTO shafts with a length of 3 that meet international standards. are arranged so as to mesh with each other.

The two-split case 24 and 25 have both gears 21 and 22 and two PTO shafts with two axial lengths 3 inserted into the case so as to be rotatable by bearings 27, and the case 24 and 25 are fixed with bolts 28 to form a partial case that has a lubricating oil chamber 29. 31.

A pipe 30 is provided in the inner case 24 so as to communicate with the lubricating oil chamber 29, and the pipe 30 projects from the mounting surface 24' of the case 24 so as to be inserted into the hole 1.

The pipe 30 also has a small hole 32 at its protruding tip.

The opening of the integral case 31 is sealed by a seal 33 to be in an oil-tight state.

Next, the manner in which the rear PTO kid 20 is attached to the rear end of the transmission case 5 will be explained.

Align the domestic specification PTO shaft 6 that protrudes from the transmission case 5 with the spline hole 26 of the gear 21, insert the pipe 30 into the hole T in the same way, and move the steel ball 9 against the spring 8 so that the rear The PTO kid 20 is joined to the transmission case 5 and rotated with bolts 34.

At this time, as shown in FIG. 3, the steel ball 9 constituting the movable seal body is in close contact with the hook 12 constituting the seat, so that the oil in the transmission case 5 is kept from leaking. As shown enlarged in Fig. 4, pipe 3
0 moves the steel ball 9, the lubricating oil in the transmission case 5 is communicated with the lubricating oil chamber 29 of the rear PTO kind 20 through the small hole 10, the hole 1, the small hole 32 at the tip of the pipe 30, and the pipe 30. .

Furthermore, since the rubber seal 11 of the hook 12 is in close contact with the outer periphery of the pipe 30, lubricating oil will not leak from this part.

Further, in this embodiment, only one communication passage between the transmission case and the rear PTO kid is provided, but it goes without saying that a plurality of communication passages may be provided to further facilitate the circulation of lubricating oil.

Since the present invention has the configuration described above, the lubricating oil chamber of the small rear PTO kid can share the lubricating oil of the large-capacity transmission case of this machine, thereby preventing premature deterioration of the lubricating oil. It can prevent fever.

In addition, even if the rear PTO kid does not have its own breather, it can share the breather of this machine by communicating with the mission case of this machine, preventing oil leakage from the seal or breather of the rear PTO kid. Even if the kit is removed from the transmission case of this machine, the movable seal prevents lubricating oil from leaking from the transmission case.

Furthermore, to communicate the lubricating oil between the rear PTO kid and this machine's tension case, all you have to do is attach the rear PTO kid to the machine, making installation and removal easy.

[Brief explanation of drawings]

Figure 1 is a partially removed front view of a passenger tractor equipped with the Nyororya PTO Kid of the present invention, and Figure 2 is a rear PT.
Figure 3 is an enlarged sectional view showing the O-kid installed, Figure 3 is an enlarged sectional view showing the rear PTO kid removed, Figure 4 is an enlarged sectional view showing the rear PTO kid removed.
The figure is an enlarged sectional view showing a state in which the rear PTO kind is attached. 1 is a passenger tractor, 5 is a transmission case, 6 is a PTO
Shaft, 7 is hole, 8 is spring, 9 is movable seal body (steel ball), 10 is small hole, 12 is seat, 20 is rear P
TO kid, 23 is different PTO shaft, 24' is rear PT
O-kid mounting surface, 29 is the lubricating oil chamber, 30 is the pipe.

Claims (1)

[Scope of utility model registration request] In a rear PTO kind that has a PTO shaft different from the PTO shaft provided at the rear end of the tractor's transmission case and is connected to and attached to the PTO shaft, the rear PTO kid communicates with its lubricating oil chamber and is connected to its mounting surface. a movable seal having a pipe that protrudes further, and forming a hole in the mission case that communicates with the inside of the case and opens to the outside of the case, and is biased outwardly by a spring in the crest hole. The movable seal body is normally biased by a spring and in close contact with the seat, and is moved by the pipe when the rear PTO kind is attached to the transmission case. A rear PTO kind for a tractor configured by communicating lubricating oil in the transmission case to a lubricating oil chamber of the rear PTO kind through a pipe and the hole.