JPS6246941Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a breather device for a rotating gearbox, which can be applied to all types of gearboxes as long as they rotate.

(b) Conventional technology Gearboxes contain oil inside to lubricate bearings, gears, etc., but when this oil is operated, the internal temperature rises and the pressure increases. Therefore, it is normal to provide a suitable breather device, but since most gearboxes are usually fixed, this breather device can also take various constructions.

However, there are some gearboxes that rotate, and it is difficult to provide a breather device for these types of gearboxes.

(c) Problems that the invention aims to solve: This is because the conventional gearbox walls that are simply made with holes or the pressure valve type that uses the pressure valve system may cause oil leakage depending on the rotational phase. This is because

Therefore, a complex and expensive structure was used, but the reality was that this complex structure often caused malfunctions and other troubles.

(d) Means for Solving the Problems Therefore, in this invention, in a breather device for a rotating gearbox, a breather passage is formed in a side wall of the gearbox to communicate the inside and outside of the gearbox, and the breather passage is A valve rod that closes the breather passage by an elastic force is inserted into the valve, and when the breather passage rotates upward, it comes into contact with the tip of the valve rod and closes the breather passage. The basic configuration includes a fixed dog that pushes down the valve stem in the direction of opening, and an additional configuration includes a roller at the tip of the valve stem.

(E) Effect As described above, only when the gearbox rotates upward, the breather passage opens and the air inside is released, so no oil leakage occurs.

(F) Embodiments Hereinafter, embodiments of this invention will be described, with reference to the drawings, and a rotating gear box installed in a root excavator for digging up tree roots together with soil clods.

Figure 1 is a side view of the digging machine, Figure 2 is a plan view, Figure 3 is a sectional plan view of the working part of the digging machine, and Figure 4 is a side view of the digging machine.
The figure is a - sectional view of Fig. 3, and Fig. 5 is a sectional view equivalent to - of Fig. 3 when this invention is applied.
FIG. 6 is an enlarged sectional view of the main part.

First, the principle of this root excavator is that a semi-arculated blade is used, the tree trunk is taken in by this blade and its blade holder, and then the blade is rotated to cut out the tree root along with the soil clod. It is something. In order to improve the cutting ability of this blade, the blade is rotated while being slightly vibrated in the direction of rotation.

Next, the overall configuration of this root digging machine is outlined as follows.

The root excavator has horizontal pivot shafts 2, 2 at the front of the vehicle body 1.
It consists of a pre-processing section 4 which can be held down by a hydraulic cylinder 3 or the like, with the center at the center.

A main shaft 5 that vibrates and rotates extends forward in the preprocessing section 4 , and the rear end of a semi-arcuate blade 6 is fixed to its tip, while its front end also extends forward from the preprocessing section 4 . It is supported by a blade receiver 7 that is stretched to the blade support 7. Note that the power to the main shaft 5 is transmitted from the input shaft 8 via the vibration rotation generating device 9 and the constant speed rotation imparting device 10.

As a result, the tree 11 to be dug is removed by the blade 6.
When the pretreatment section 4 is lowered and activated, the blade 6 vibrates and rotates, cutting off the soil clod 12 at the root corresponding to its semi-arched shape.

Vibratory force and rotational force to the main shaft 5 are applied by the above-mentioned vibration rotation generating device 9 and uniform rotation imparting device 10.

That is, the vibration rotation generator 9 is integrated with the main shaft 5 and vibrates while rotating the gearbox 1.
3 (hereinafter referred to as box 13), eccentric elements 14, 14, which are pivotally supported by this box 13 and balanced around the main shaft 5, are rotated.

Since the eccentrics 14, 14 are arranged so that their eccentric directions are point symmetrical with respect to the main shaft 5, forward and reverse moments are applied to the box 13 and the main shaft 5 depending on the rotational positions of the eccentrics 14, 14. (vibration) occurs periodically.

On the other hand, the constant velocity rotation imparting device 10 rotates the main shaft 5 in a fixed direction while receiving these forward and reverse vibrations. It is then transmitted to the worm wheel 17 loosely fitted to the main shaft 5,
Furthermore, the pistons 18, 18 installed on the worm wheel 17 and the transmitter 19, which is tightly fitted to the main shaft 5, are connected via springs 20, 20. Therefore, even if the main shaft 5 generates vibrations in the forward and reverse directions, the springs 20, 20 will tolerate (absorb) it and will eventually rotate the main shaft 5 in a fixed direction. be.

By the way, this idea is based on the above-mentioned box 13.
This is equipped with the following breather device.

Since the gearbox 13 has a side wall 21, a breather passage 22 that communicates the inside and outside is first formed in this part, and a spring 23 is used in this breather passage 22 to move the gear upward (outward). A valve rod 24 which is ejected and which closes the breather passage 22 at that time is inserted. When this portion of the breather passage 22 rotates upward, the fixed dog 25 that comes into contact with the tip of the valve stem 24 and pushes down the breather passage 22 in the direction of closing the valve rotates upward. Bar 24
It is placed above the tip.

Note that since there is nothing above the box 13, the above-mentioned fixed dog 25 is attached to the box 1.
The arch body 27 is attached to the side plates 26, 26 on the sides of 3.
It will be constructed in the center of the back surface.

Also, at this time, a roller 28 is attached to the tip of the valve stem 24.
If this is installed, the frictional resistance between the fixed dog 25 and the valve stem 24 can be reduced.

(g) Effects of the invention First, the breather passage 2 that constitutes the breather device
2 is at the top, the valve stem 24 that is blocking it comes into contact with the fixed dog 25 and opens it, so even if the inside is filled with oil etc. , oil, etc. will not leak.

In addition, since these operations are performed only during work, that is, when the box 13 is rotating, they are efficient, and are carried out reliably each time the box 13 rotates.
Since it is performed relatively frequently, it can be said that the breather effect is high.

Furthermore, since its structure is simple, consisting of the valve stem 24 and fixed dog 25 as described above,
It also has the advantage of being inexpensive to manufacture.

[Brief explanation of the drawing]

The drawings show a case in which this invention is applied to a vibrating and rotating gearbox of a root excavator, and FIG. 1 is a side view of the root excavator, and FIG.
Figure 3 is a cross-sectional plan view of the working part of the root excavator, Figure 4 is a cross-sectional view of Figure 3, Figure 5 is a cross-sectional view equivalent to Figure 3 when this invention is applied, and Figure 6 is a cross-sectional view of the working part of the digging machine.
The figure is an enlarged sectional view of the main part. Code, 13...Gearbox, 21...Side wall,
22...breather passage, 24...valve stem, 25...
Fixed dog, 28...roller.

Claims (1)

[Claims for Utility Model Registration] In a breather device for a rotating gearbox 13, a side wall 21 of the gearbox 13 is provided with:
A breather passage 22 that communicates between the inside and outside of the gearbox 13 is formed, and a valve rod 24 that closes the breather passage 22 by elastic force is inserted into the breather passage 22. When the passage 22 rotates upward, a fixed dog 25 is provided which comes into contact with the tip of the valve stem 24 and pushes down the valve stem 24 in the direction of opening the breather passage 22. Gearbox breather device. A breather device for a rotating gearbox as claimed in claim 1, characterized in that a roller 28 is provided at the tip of a valve stem 24.