JPH08266128A - Moor - Google Patents

Abstract

PURPOSE: To suppress the leak of a lubricating oil from a brazier by placing the breather at a bevel case placed on the upper surface of a cutting blade housing in a moor and suppressing the pressure increase in the case. CONSTITUTION: A moor is provided with an input bevel case C receiving power from the front and back directions placed on the upper surface of a cutting blade housing (m). An expanded part 31 locally protruding outside the case is placed at the front or back wall of the bevel case C. An oil-supplying hole 32 for feeding lubricating oil into the expanded part 31 and an oil feed cock 33 having a breather is put on the oil-supplying hole 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mower having an input bevel case for receiving power from the front and rear directions on the upper surface of a cutting blade housing.

[0002]

2. Description of the Related Art In a mower input bevel case, lubricating oil for a bevel gear is contained in about half of the case, and an oil supply hole on the upper surface of the case is closed by a cap.

[0003]

As the temperature of the lubricating oil rises, the pressure inside the bevel case rises, the oil seal for oil tightness between the input shaft and the through hole deteriorates early, or the oil seal is exposed to internal pressure due to external pressure. There was the inconvenience of flying to.

Therefore, it is conceivable to provide an oil supply plug with a blazer in the oil supply hole of the bevel case as a means for solving the above-mentioned drawbacks. For a bevel case having a rectangular shape in plan view, an output bevel gear is mainly used for input. If an oil filler plug with a blazer is provided on the upper part of the case opposite to the side where the bevel gear is present, it is possible to prevent the lubricating oil that is blown upward by the rotation of the input bevel gear from leaking out from the oil filler plug with a blazer. Even if it is possible, there is a disadvantage that the lubricating oil flying obliquely upward due to the output bevel gear rotating around the vertical axis leaks to the outside through the oil filler plug with the blazer.

An object of the present invention is to provide a blazer on the oil filler plug of the bevel case to suppress the pressure rise in the case, and to prevent the lubricating oil from leaking out from the blazer of the oil filler plug.

[0006]

According to the present invention as set forth in claim 1, a bulge portion locally protruding to the outside of the case is formed on one of the front and rear walls of the bevel case, and the bulge portion is formed. An oil supply hole for supplying lubricating oil is provided at the outlet, and an oil supply plug with a blazer is attached to this oil supply hole.

According to a second aspect of the present invention, through holes having the same specifications are formed concentrically in the front and rear walls of the input bevel case, and the input shaft is inserted into one of the through holes while the other is inserted. The through hole is configured to be closed with a lid.

[0008]

According to the first aspect of the present invention, the increase of the pressure in the case can be suppressed by providing the oil filler plug with the blazer.

Further, since a bulging portion that locally projects to the outside of the case is formed on one of the front and rear walls of the bevel case, and the bulging portion is provided with an oil supply hole for supplying lubricating oil. In other words, the lubricating oil supply hole is provided at a position hidden behind the bearing holder that rotatably supports the input shaft, so that the lubricating oil splashed by the rotation of the output bevel gear that rotates around the vertical axis Since it is shielded by the bearing holder, the lubricating oil is prevented from leaking to the outside through the blazer.

According to the second aspect of the present invention, through holes having the same specifications are formed concentrically in the front and rear walls of the input bevel case, and the input shaft is inserted through one of the through holes. Since the other through-hole is configured to be closed by the lid, as shown in FIGS. 1 and 7, depending on the model such as the mid-mount type mower or the front-mount type mower, the bevel is attached to the cutting blade housing. By changing the front-back direction of the case so that the oil supply hole can be located at the rear part of the machine body or at the front part of the machine body, it can be applied to both the mid-mount type mower and the front-mount type mower.

[0011]

According to the present invention as set forth in claim 1, by providing the oil filler plug with the blazer, it is possible to suppress the temperature rise in the case, and to prevent the oil seal from being deteriorated early and the oil seal from coming off. Can be suppressed. In addition, an expensive oil seal for pressure resistance is not required, and an inexpensive oil seal can be used.

Since the oil supply hole for the oil supply plug with the blazer is provided at a position hidden by the shadow of the bearing holder, the lubricating oil splashed by the rotation of the output bevel gear does not leak to the outside through the blazer. It is possible to prevent the cutting blade housing from being soiled.

According to the second aspect of the present invention, the front and rear directions of the bevel case with respect to the cutting blade housing can be changed so that the oil supply hole is located at the rear part of the machine body or at the front part of the machine body. It can be applied to both the mid-mount type mower and the front-mount type mower, and the versatility of the mower is enhanced.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the whole of a mid-mount type riding lawn mower equipped with a mower between front and rear wheels of a traveling body,
This mid-mount riding lawn mower is
A mower M is mounted between the rear wheels 2 and 3 via a link mechanism 4. Also, this riding lawn mower is a four-wheel drive type,
Power is transmitted from the engine 5 at the front of the machine to the hydrostatic stepless transmission 7 via the transmission shaft 6, and the rear wheels 3 are driven from the hydrostatic stepless transmission 7 via the differential device in the mission case 8. In addition, the front wheel 2 can be driven by being transmitted to the input shaft d of the front wheel differential case D via the mid PTO shaft 8a protruding from the mission case 8 and the front wheel drive shaft 9.

The mower M is transmitted to a support shaft 11 rotatably supported on the front wall of the transmission case 8 via a belt transmission 10 branched from the input shaft of the hydrostatic continuously variable transmission 7. Then, from the support shaft 11 to the joint shaft 1
The blade of the mower M is configured to be driven by being transmitted to the input shaft 13A of the bevel case C on the upper surface of the cutting blade housing m of the mower M via 2.

As shown in FIG. 2, the mower M is disposed at the left-right center a of the machine body, and the bevel case C is arranged offset laterally to the left side of the machine body with respect to the left-right center of the cutting blade housing m. Is set up, and the opposite side of the offset,
That is, the front wheel drive shaft 9 is arranged in the empty space on the right side.

The mower M is a three-blade type mower in which three blades b, which rotate around the longitudinal axis, are housed in the cutting blade housing m, and the output of the bevel gear mechanism 13 housed in the bevel case C. The center blade b1 is driven via the shaft 13B, and the belt 17 is wound around the pulley 14 attached to the center blade shaft 13B and the pulleys 16 attached to the blade shafts 15 on both the left and right sides. The blade b2 of is capable of being driven.

As shown in FIG. 4, the bevel case C is used.
Is a pair of left and right support stays 1 on the upper surface of the cutting blade housing m.
It is attached via 7, 17. The support stay 1
7, 17 are support stays 17 for the cutting blade housing m.
In order to obtain the squareness of the support stay 17, the squareness of the support stay 17 relative to the cutting blade housing m is cut by cutting the mounting surface of the lower surface. To prevent the bevel case C from collapsing. Also, the pulley holder 1
By using the reamer bolt 19 with high accuracy for connecting the cutting blade housing m and the support stay 17, the mounting accuracy is improved, and the pulley holder 18 and the bevel case C are assembled in a straight line as a whole. As a result, noises due to twisting of the bearings 21 and 22 that rotatably support the output shaft 13B and defective engagement of the bevel gears 13a and 13b are attempted.

As shown in FIG. 3, the bevel gear mechanism 13 provided in the bevel case C has a driving side bevel gear 13a as an input bevel gear attached to the input shaft 13A and an output bevel gear attached to the output shaft 13B. And the input side shaft 13A of the input shaft 13A.
Is supported by the bevel case C through a pair of front and rear bearings 20, 20, and the output shaft 13B is supported by a bearing 21 of the bevel case C and a bearing 22 of the pulley holder 18.

The position of the input shaft 13A in the axial direction is regulated via the large diameter portion 23, and the pair of front and rear bearings 20, 20 are provided with an adjusting collar 24 and a circlip 25. The position of the bevel case C in the axial direction is restricted.

The holes 26, 26 for inserting the input shaft 13A of the bevel case C are formed by through holes penetrating the front wall and the rear wall, and the bevel case C faces forward or backward with respect to the cutting blade housing m. Input shaft 1
3A is projected to the rear part of the machine body so that power can be transmitted from the rear part of the machine body. An opening 27 for inserting a bevel gear is formed on the upper surface of the bevel case C. The through hole 26 for inserting the input shaft 13A and the upper opening 27 formed in the front wall are respectively provided in the cap 2
It is closed via 8, 29.

The bevel case C, in plan view,
On one lateral side of the rear wall, that is, on the lateral side of the bearing holder 30, there is provided a bulging portion 31 that locally protrudes rearward. The bulging portion 31 has an oil supply hole 32 for supplying lubricating oil. Is provided, and an oil supply plug 32 with a blazer is provided in the oil supply hole 32. Blazer 33a formed on the oil filler plug 33
Has a vertical hole of φ10 mm and a horizontal hole of φ1 mm.

The bevel case C contains about half the case of lubricating oil, and the input shaft 13 that penetrates the rear wall is formed.
Oil tightness is achieved by oil seals 34, 34 provided between the hole 26 for insertion of A and the input shaft 13A and between the hole for insertion of the output shaft 13B penetrating the bottom wall and the output shaft 13B. There is.

According to the above structure, the passive side bevel gear 13
Lubricating oil in the tangential direction splashing on the blazer-equipped filler plug 33 is blocked by the bearing holder 30 on the rear wall to prevent the lubricating oil from falling on the blazer-equipped filler plug 33.

The bevel case C is formed line-wise except for the bulging portion 31 of the oil supply hole 32, that is, the input shaft insertion holes 26, 26 are concentrically formed on the front and rear walls. Through the shaft center of the output shaft 13B, the distance to the inner end surface of the bearing holder 30, 30, the circlip 25,
The distances up to 25 and the outer end surfaces of the bearing holders 30 and 30 are configured to have the same length.

[Other Embodiment] Next, an embodiment of the present invention will be described with reference to the case where the present invention is applied to a front mount type riding lawn mower in which a mower is attached to the front part of the machine body.

As shown in FIG. 7, when applied to a front-mounted riding lawn mower, the bevel case C with the bulging portion 31 provided with the oil filler plug 33 positioned on the front side of the machine body is used.
To the cutting blade housing m.

In this case, even if the mower M is tilted backward as the mower M rises, the lubricating oil in the bevel case C can be prevented from leaking from the blazer of the oil filler plug 33, and the mid mount can be prevented. It can be applied to type riding lawn mowers and front-mount type riding lawn mowers, and the versatility of the mower can be achieved.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

1] Overall side view of a riding lawn mower

FIG. 2 is a plan view of mower.

[Figure 3] Vertical side view of the bevel case

FIG. 4 is a vertical sectional front view of the same.

FIG. 5 is a vertical sectional side view showing a blazer in a bevel case.

FIG. 6 is a cross-sectional plan view of the bevel case.

FIG. 7 is a plan view of another embodiment.

[Explanation of symbols]

 13A input shaft 26 input shaft insertion hole 28 lid 31 bulge 32 oil supply hole 33 oil supply plug C input bevel case M mower m cutting blade housing

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masatoshi Yamaguchi 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd.

Claims (2)

[Claims] 1. A mower (M) comprising an input bevel case (C) for receiving power from the front-rear direction on the upper surface of a cutting blade housing (m), wherein a case is provided on one of the front and rear walls of the bevel case (C). A bulging part (31) protruding locally is formed on the outside, and an oil supply hole (32) for supplying lubricating oil is provided in the bulging part (31), and an oil supply with a blazer is provided in the oil supply hole (32). A mower with a stopper (33) attached. 2. The through holes (26) having the same specifications are formed concentrically on the front and rear walls of the input bevel case (C), and the input shaft (26) is formed in one of the through holes (26). 13A) and the other through hole (26) is covered (28).
The mower according to claim 1, wherein the mower is configured to be closed.