JPH0451555Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a transmission cover structure that covers a winding transmission means of a cutter shaft of a mower.

(Prior art) For example, in a tractor-mounted mower, a vertical cutter shaft is supported on the mower deck via a plurality of bearing cases, one of the plurality of cutter shafts is the drive side, and the drive cutter shaft is Power is transmitted from the cutter shaft to other cutter shafts via a winding transmission means.
The winding transmission means is arranged above the mower deck,
Covered by a transmission cover.

Conventional power transmission covers are either closed all around or open on the left and right sides.
Each is fixed to the upper surface of the mower deck via bolts.

(Problems to be solved by the invention) In the above-mentioned all-around closed type transmission cover, if water enters due to washing or rain, the rotating parts such as pulleys will be damaged due to poor drainage and poor ventilation inside the transmission cover. There is a problem in that it rusts early and the wrapping body such as a belt is easily damaged.

In addition, although the left-right open type transmission cover has good drainage and ventilation, it is easy for water to get in and large debris such as grass and straw to get in, which, like the former, causes rust on the pulleys and damage to the belt.

(Means for Solving the Problems) The present invention solves the problems of the prior art by forming an opening on the lower side from a height at which the rear wall of the transmission cover is wrapped around and closes the rear of the transmission means. This allows the points to be resolved.

That is, the specific configuration of the problem solving means in the present invention is that the mower deck 13 is provided with a plurality of bearing cases 22.
A winding transmission means 18 is provided between the plurality of cutter shafts 24 above the mower deck 13, and this winding transmission means 18
Remove the transmission cover 17 that covers the surrounding area of the mower deck 13.
In the mower mounted on the upper part of the winding transmission means 1, the rear wall 17b of the transmission cover 17 closes the rear of the winding transmission means 18 and
The opening 38 is formed from approximately the lower height of the mower deck 8 to the upper surface of the mower deck 13.

(Function) The transmission cover 17 covers the upper and left and right sides of the winding transmission means 18 above the mower deck 13, and the front part is closed by contacting with the front part 13F of the mower deck 13, and is protected against washing with water or rain. It prevents water from entering during rain and also prevents grass and straw from entering, and the rear wall 1
The opening 38 formed in 7b allows air circulation, that is, allows the wind generated by the rotation of the wrapped transmission means 18 to flow in and out of the transmission cover 17, and removes moisture inside the transmission cover 17. Remove. The rear wall 17b of the transmission cover 17 closes off the rear of the winding transmission means 18, and prevents grass from getting wrapped around the winding transmission means 18 and water from getting on it, and also prevents water from splashing out when the belt peels off. to prevent

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In FIGS. 1, 5, and 6, reference numeral 1 denotes a mid-mounted mower, which is mounted on the lower abdomen of a vehicle body 5 between front wheels 3 and rear wheels 4 of a tractor 2. The mower 1 runs integrally with the vehicle body 5 and can be raised and lowered by means of a traction means 6 and a hanging link mechanism 7,
Power is transmitted from the PTO shaft 9 of the front power take-off mechanism 8 via the universal joint 10.

The mower 1 has a box-shaped deck 13 with openings on the bottom and right sides, and on the front side of the deck 13, limit gauge wheels 14 are arranged in the center and on both left and right sides, and on the rear side, grounding wheels 15 are arranged on both left and right sides. has been done. The right opening of the deck 13 serves as a grass outlet 16.

The upper wall of the mower deck 13 is lowered by one step from the front part 13F to the rear part 13R. The inner surface of the front part 13F serves as a grass clipping transport path. A transmission cover 17 covers the upper part of the rear part 13R and is substantially flush with the front part 13F.
defines a space 19 for accommodating the wrapped transmission means 18 above the rear portion 13R.

Bearing cases 22 are fixed to the lower surface of the deck rear 13R at the center and on both left and right sides, and each bearing case 2
2, a vertical cutter shaft 24 is supported via a bearing 23, and a cutter 25 is attached to the lower end of each cutter shaft 24.

The central cutter shaft 24A projects above the transmission cover 17, and the upper half of the cutter shaft 24A is supported by the transmission case 26 via a bearing 27. The transmission case 16 is located at the rear of the deck 1
3R, has a bearing portion 26a on the front surface of a portion that protrudes upward from the transmission cover 17, and supports the input shaft 28.

The input shaft 28 is connected to the universal joint 10.
The bevel pinion 29 provided at the rear connects to the bevel gear 3 at the upper end of the central cutter shaft 24A.
It meshes with 0.

A pulley 32 is provided at the vertical center of the central cutter shaft 24A and the upper ends of the left and right cutter shafts 24B and 24C, and a tension pulley 35 is pivotally supported at the rear of the deck via a pivot 33 and an arm 34. A belt 36 is wound around these pulleys 32 and 35 to form a winding transmission means 18, which transmits the power of the central driving cutter shaft 24A to the left and right cutter shafts 24.
B, 24C, and the three cutters 25 are configured to rotate synchronously.

In FIGS. 2 to 5, the transmission cover 17 has left and right side walls 17a and a rear wall 17b, and there is no standing wall in the front part, and it comes into contact with the upper surface of the deck front part 13F, so that the transmission cover 17 is connected to the winding transmission means. It covers around 18. An opening 38 is formed in the lower half of the rear wall 17b, allowing air to circulate between the space 19 and the outside.

The rear wall 17b is connected to the winding transmission means 18, especially the belt 3.
The rear part of the belt 6 is closed to prevent grass from getting wrapped around the belt 36 and the pulley 32, and to prevent water from getting on the belt 36 and the pulley 32. prevents it from flying out.

The opening 38 has a large area and is formed from approximately the lower height of the winding transmission means 18 to the upper surface of the mower deck 13. There is no rear wall 17b near the upper surface of the mower deck 13, and there is no space inside the transmission cover 17. The size and shape are such that even if grass or the like gets in there, it can be easily discharged by the wind generated by the winding transmission means 18.

The transmission cover 17 can be formed in one piece, but
In the embodiment, it has a structure in which it is divided into left and right parts, each of which can be attached and detached independently, and notches 40 that fit into the transmission case 26 are also formed on each of the left and right parts.

There are multiple locking tools 3 on the upper surface of the deck rear part 13R.
9 is fixed with bolts. This stopper 39 is made by welding a pin 42 to an angle member 41.
The rear wall surface 17b of the power transmission cover 17 has a hole 43 into which the pin 42 is fitted, and when the pin 42 is fitted into the hole 43, the rear wall surface 17b abuts against the angle member 41 and is locked.

A plurality of hook bodies 44 are provided on the upper surface of the front part 13F of the deck, and a hook 45 is provided in the front part of the transmission cover 17 in correspondence with the hook body 44. A stopper 46 is formed. The hook 45 is commonly called a shrimp metal fitting, and consists of a bracket 47 fixed to the transmission cover 17, a lever 49 pivotally supported to the bracket 47 via a shaft 48, and a pin 50 inserted in the middle of the lever 49. By engaging the engaging claw 51 with the hook body 44 and rotating the lever 49 in the direction of the arrow 52, the transmission locked to the locking tool 39 is activated. Fix the cover 17 to the mower deck 13 while pulling it forward.

The locking tool 39 and the stopper 46 are not limited to those in the embodiment described above, and various conventional mounting tools may be used, and the transmission cover 17 may be fixed with bolts.

Furthermore, although the winding transmission means 18 has been exemplified using the pulleys 32 and 35 as rotating bodies and the belt 36 as a winding body, chain transmission means each comprising a sprocket and a chain may be used.

In addition, when the upper part of the mower deck 13 is flush with the front and back, the transmission cover 17 is attached to the winding transmission means 18.
A front wall is provided to cover the front of the.

(Effect of the invention) According to the invention detailed above, the transmission cover 17
The rear wall 17b closes the rear of the winding transmission means 18 and forms an opening 38 from approximately the lower height of the winding transmission means 18 to the upper surface of the mower deck 13, so that grass, water, etc. are not transmitted. In addition to preventing as much as possible from entering the cover 17 from the left, right, side, and upper periphery, it is possible to prevent grass, water, etc. from wrapping around or adhering to the winding transmission means 18 from the rear. ,
Even if they enter, they can be removed very easily from the large opening 38, and even if the winding transmission means 18 is damaged, they can be prevented from flying out rearward.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a sectional side view of the mower, FIG. 2 is a partially sectional plan view of the transmission cover, and FIG. 3 is a sectional view taken along the - line in FIG. 2.
FIG. 4 is a cross-sectional side view of the stopper, FIG. 5 is a plan view of the mower, and FIG. 6 is a side view of the mower mounted on a tractor. 1...Moa, 13...Moa Detsuki, 13F
...Front part, 13R... Rear part, 17... Transmission cover, 17a... Side wall, 17b... Rear wall, 18...
Winding transmission means, 22... bearing case, 24... cutter shaft, 32... pulley (rotating body), 36... belt (winding body), 38... opening, 39... locking tool, 46 ……Fasteners.

Claims (1)

[Claims for Utility Model Registration] A vertical cutter shaft 24 is supported on the mower deck 13 via a plurality of bearing cases 22, and a winding transmission means 18 is provided between the plurality of cutter shafts 24 above the mower deck 13. In a mower in which a transmission cover 17 that covers the circumference of the winding transmission means 18 is mounted on the upper part of the mower deck 13, the rear wall 17b of the transmission cover 17 closes the rear of the winding transmission means 18, and the winding transmission Means 1
A mower transmission cover structure characterized in that an opening 38 is formed from approximately the lower height of the mower deck 8 to the upper surface of the mower deck 13.