JPH0455467Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a dust-proof device for a mower that prevents cut grass, etc. from entering the deck housing the pulleys and V-belts.

BACKGROUND ART Conventionally, there is a mower in which a deck holding a plurality of cutting blade shafts is attached to the abdomen of a tractor, and a cutting blade facing parallel to the ground is connected to the lower end of the cutting blade shaft protruding from the bottom surface of the deck. In such a moa,
Power is transmitted from the tractor engine to the bevel box attached to the deck via a universal joint, etc., and first, one cutting blade shaft connected to the bevel gear in the bevel box is rotated. Further, a V-belt is wound between a pulley connected to this cutting blade shaft and a pulley connected to another cutting blade shaft to rotate the other cutting blade shaft. Note that the pulleys and V-belts are provided inside the deck, and a belt cover that covers these pulleys and V-belts is attached to the deck.

Next, the bevel box is attached to the deck using a bracket, and the upper part of the bracket is tightened and fixed to the side of the bevel box.
The lower part of the bracket is fastened to the deck.
The upper part of the bevel box provided with the input shaft connected to the universal joint is located above the belt cover, and the lower part of the bevel box is located below the belt cover. For this reason,
A hole surrounding the outer periphery of the bevel box is formed in the belt cover, and a dustproof material such as a sponge is pasted in the gap between the outer surface of the bevel box and the periphery of the hole in the belt cover. There is.

Problems to be Solved by the Invention However, the shapes of bevel boxes and brackets are complex, and it is not possible to completely close the gap between the outer surface of the bevel box and the periphery of the hole in the belt cover. Furthermore, sponges and the like attached to this gap are easily peeled off due to vibrations and the like. For this reason, cut grass etc. can easily enter the deck through the gap between the bevel box and the belt cover, and if grass etc. enters the deck, it may cause the V-belt to come off or damage the bearing part, and the deck may This causes internal corrosion.

Means for Solving the Problem The outer periphery of the bevel box fixed to the deck is formed into a substantially rectangular shape, and a pair of belt covers are provided to cover the upper part of the pulley and belt inside the deck and to sandwich the bevel box from both sides. A substantially U-shaped notch is formed in a portion of the belt cover that faces the outer periphery of the bevel box, and a dustproof body made of a substantially U-shaped elastic member matching the shape of the notch is provided. A crocodile-like joint portion into which the edge of the notch is fitted is formed on the outer periphery of the dustproof body, and an engagement groove into which the inner circumference of the dustproof body engages is formed on the outer periphery of the bevel box.

Function A dustproof body is attached between the outer periphery of the bevel box and the notch of the belt cover, and the edge of the notch is joined to the joint formed on the outer periphery of the dustproof body. The inner circumference of the body engages with the engagement groove formed on the outer circumference of the bevel box,
To surely prevent grass, etc. from entering a deck between the outer periphery of a bevel box and the notch of a belt cover.

Embodiment An embodiment of this invention will be described based on the drawings. First, a support frame 2 is attached to the abdomen of the tractor 1.
Deck 3 is connected by
A wheel 4 that rotates in contact with the ground is attached to the. The deck 3 has three cutting blade shafts 5 arranged in the left-right direction perpendicular to the traveling direction of the tractor 1.
6 and 7 are rotatably supported with their axes parallel to each other in the vertical direction. Disc-shaped cutting blades 8 facing parallel to each other are connected. Incidentally, the deck 3 has a substantially box shape, and has an opening 9 formed in its upper surface.

Next, a bevel box 11 is attached to the deck 3 by a pair of left and right brackets 10. A bevel gear 13 connected to an input shaft 12 and a bevel gear 14 connected to the upper end of the cutting blade shaft 5 located in the center are housed in the bevel box 11. One end of a universal joint 15 is connected to the tip of the input shaft 12 . Note that the other end of the universal joint 15 is connected to an engine (not shown) of the tractor 1. Further, the lower end of the bracket 10 is fixed to the bottom surface of the deck 3, and the upper end is fixed to the bevel box 11.
is fixed to the outer surface of the Inside the deck 3 are pulleys 16, 1 connected to the cutting blade shafts 5 to 7.
7, 18 and tension pulley 19 are housed,
Between these pulleys 16 to 19 is a belt V.
A belt 20 is wound around it.

Next, a pair of belt covers 21 and 22 are provided that cover the pulleys 16 to 19 and the V-belt 20 and close the opening 9 of the deck 3. These belt covers 21, 2
The belt covers 21 and 2 are arranged to sandwich the bevel box 11 from both left and right sides.
A substantially U-shaped notch 2 is provided in each of the portions facing the outer periphery of the bevel box 11 in the box 2.
3 and 24 are formed. Next, a dustproof body 2 is formed in a substantially U-shape to match the shape of the notches 23 and 24 and is made of an elastic member.
5, 26 are provided, and these dustproof bodies 25, 26
An alligator-shaped joint 27 into which the edges of the notches 23 and 24 are fitted is formed on the outer periphery. Furthermore, an engagement groove 28 is formed in the outer circumferential portion of the bevel box 11 in the front-rear direction, with which the inner circumferential portions of the dustproof bodies 25 and 26 engage. Furthermore, on both the left and right sides of the bevel box 11, there are dustproof bodies 2.
The inner peripheral portions of the brackets 5 and 26 are in contact with the outer peripheral surface of the bracket 10.

In such a configuration, power from the engine of the tractor 1 is transmitted via the universal joint 15, the input shaft 12, etc., and first, the central cutting blade shaft 5 is rotationally driven. As the cutting blade shaft 5 rotates, other cutting blade shafts 6 and 7 are connected to each other via the V belt 20.
The cutting blades 8 are also rotated and connected to each of the cutting blade shafts 5 to 7.
Grass mowing is carried out by

Next, attach the belt cover 2 to the opening 9 of the deck 3.
1 and 22, first, attach the notch 2.
The edges of 3 and 24 are connected to the joint 27 of the dustproof bodies 25 and 26.
Insert the dustproof body 25 into the notches 23 and 24,
26. Next, the dustproof body 25,2
A part of the inner peripheral part of the bracket 6 is engaged with the engagement groove 28, and the other part of the inner peripheral part is brought into contact with the outer peripheral surface of the bracket 10, and the belt covers 21 and 22 are attached to the deck 3.
Screw it on. Therefore, bevel boxes 1
1 and the notch 2 of the belt covers 21 and 22
3 and 24 are completely closed, and the formation of a gap due to vibration or the like is prevented. Therefore, cut grass, etc., is prevented from entering the inside of the deck 3 from between the outer circumference of the bevel box 11 and the notches 23, 24 of the belt covers 21, 22, and grass, etc. is prevented from entering. This prevents the V-belt 20 from coming off, the bearing from breaking, and the inside of the deck 3 from corroding.

As shown in FIG. 5, the dustproof bodies 25 and 26 are formed to have a substantially L-shaped cross section, and the notches 23 and 24 are formed in the approximately L-shaped joint 29 formed on the outer periphery of the dustproof bodies 25 and 26. The edges may be fixed with adhesive.

Effects of the invention Since this invention is configured as described above, it is possible to reliably close the space between the outer circumference of the bevel box and the notch of the belt cover that surrounds the outer circumference of the bevel box with the dustproof body. , it is possible to prevent grass etc. from entering the deck, and it is possible to prevent the belt from coming off, damage to the bearings, and corrosion inside the deck that would occur due to grass etc. entering the deck. has.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is an exploded perspective view showing the main parts enlarged, Fig. 2 is a side view of the whole, Fig. 3 is a plan view showing the main parts enlarged, and Fig. 4 is a sectional view showing the main parts enlarged. FIG. 5 is a sectional view showing an enlarged main part of another embodiment. 1...Tractor, 3...Deck, 5-7...Mower blade shaft, 8...Mower blade, 11...Bevel box, 1
6-18... Pulley, 20... V-belt (belt), 21, 22... Belt cover, 23, 24
... Notch, 25, 26 ... Dustproof body, 27 ... Joint section, 28 ... Engagement groove, 29 ... Joint section.

Claims (1)

[Scope of utility model registration request] A deck that holds a plurality of cutting blade shafts to which cutting blades are connected and stores pulleys connected to each cutting blade shaft and a belt wound between these pulleys is connected to the tractor, and the deck is connected to the tractor. In a mower in which a bevel box that inputs power from an engine is fixed to the deck, the outer periphery of the bevel box is formed into a substantially rectangular shape, and covers the upper part of the pulley and the belt and sandwiches the bevel box from both sides. A pair of belt covers are provided, a substantially U-shaped notch is formed in a portion of the belt cover facing the outer periphery of the bevel box, and the belt cover is made of a substantially U-shaped elastic member that matches the shape of the notch. A dustproof body is provided, and an alligator-shaped joint is formed in which the edge of the notch is fitted into the outer circumference of the dustproof body, and an inner circumference of the dustproof body engages with the outer circumference of the bevel box. A mower dustproof device characterized by forming a matching groove.