JPH0742935Y2 - Scraper device for driving wheels of snow vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a scraper device for removing snow clumps adhering to drive wheels of a vehicle running on snow.

(Prior Art) The scraper of Japanese Patent Application No. 2-25583 previously filed by the present applicant is attached to a swing arm so as to be adjustable in position while facing the outer circumference of a drive wheel.

(Problems to be solved by the invention) The drive wheel of a snowmobile is attached to a swing arm so as to be adjustable in the longitudinal direction or the front-rear direction in order to adjust the slack of a chain for driving the snowmobile or to convert the chain. There is. Therefore, if the position of the drive wheel is adjusted or changed, the distance between the drive wheel and the scraper changes. An object of the present invention is to obtain a device that does not require such trouble.

(Means for Solving the Problems) The means for solving the problems in the present invention is to support a drive wheel on a swing arm so that the mounting position can be adjusted, and dispose a scraper so as to face the outer peripheral surface of the drive wheel. In a scraper device for a drive wheel of a snow vehicle, which removes snowflakes adhering to the outer peripheral surface with rotation of a drive wheel, a scraper is fixed to a scraper arm extending from a tubular body loosely fitted to the shaft of the drive wheel, An arm extending from the cylindrical body is locked to a swing arm so as to be movable in the longitudinal direction and not swingable.

(Operation) When the position of the drive wheel is adjusted by the above means, the cylindrical body of the scraper device loosely fitted to the shaft moves together with the shaft, so that the distance between the scraper and the drive wheel does not change.

(Embodiment) A snow vehicle embodying the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 is a snow vehicle constructed by utilizing a vehicle body for a motorcycle, 2 is a main frame, 3 is a steering wheel, 4 is a front fork, 5 is an engine, and a fuel tank is provided on the main frame 2. A seat 7, an air cleaner 8 and the like are attached to a seat frame extending from the main frame 2, and a cover 9 is attached to surround the front and side surfaces of the vehicle body.

The pivot plate 10 at the rear end of the main frame 2 has a pivot.
A rear fork 12 is pivotally supported by 11, and the rear fork is
A rear cushion 14 is provided between a cushion bracket 13 fixed to 12 and a frame member (not shown).

As shown in FIG. 3, the rear fork 12 has left and right fork members 12L and 12R, which are front and rear cross members 15 and 16 respectively.
The cross members 15 and 16 are connected to the stay 17 by a pair of intermediate shaft brackets 18, and the cushion bracket 13 is welded to the front cross member 15. The intermediate shaft bracket 18 has a substantially L shape, has a space portion 19 on the back surface, and has pivot holes 20 and elongated holes at both ends.
21 is provided, and the L-shaped pawl 18a shown in FIG.
Are laterally projected so that the intermediate shaft assembly 22 can be fixed in position adjustable.

In the intermediate shaft assembly 22, as shown in FIGS. 5 and 6, the bearing 24 is fitted to the pipe-shaped intermediate shaft 23, and the primary sprocket 25 and the secondary sprocket 26 are fitted so as not to rotate relative to each other. Then, two sets of arms 29 and 30 extend in opposite directions from the bearing 24, and are fastened with a set screw 27 and a nut 28.
It is equipped with 9a and 30a. Then, the bearing 24 is positioned in the space portion 19, the pin 31 is inserted through the pivot hole 20 and the locking hole 29a and pivotally attached, and the bolt 32 is inserted through the elongated hole 21, the locking hole 30a and the eyebolt 33. The intermediate shaft assembly 22 can be fixed at a desired position by tightening the nut 33 in the proper position of the elongated hole 21 and the nut 32a to the L-shaped pawl 18a, and the output sprocket 34 and the primary sprocket 25 of the engine 5 can be wound. Multiplied by 1
The looseness of the next chain 35 can be adjusted. Secondary sprocket
The tension of the secondary chain 36 wound around the 26 is achieved by the displacement of the next sprocket, as will be described later.

The drive portion 37 driven by the secondary chain 36 is provided over the rear fork 12 and the wheel bracket 39 connected to the rear fork 12 as shown in FIGS.
Covered with. The drive unit 37 includes drive wheels 40 that are driven by a secondary chain 36 to drive an endless belt 41, guide wheels 42 and 43 for grounding the endless belt 41 for a predetermined length, and a wheel bracket 39. Further, the lifting handle 44 is fixed to the C type.

The drive wheel 40 is rotatably supported by a fixed shaft 46 that penetrates an elongated hole 45 provided in the rear fork 12, and the fixed shaft 46 has an eyebolt 47 that is fitted to the fixed shaft 46 and is fixed to the rear fork 12.
It is positioned by inserting it through the die claw 48 and fixing it with two nuts 49. The hub 50 of the drive wheel 40 has a rim 52 on one end side.
A flange 51 for fixing the
A brake drum 53 is formed integrally with the hub 54, and a hub 56 to which a sprocket 55 is fixed is connected to the flange 54 on the other end side. The hub 50 and 56 constitute a drive shaft 57, and the drive shaft 57 is The bearings 58 and 58a support the fixed shaft 46. On the other hand, on both sides of the rim 52, drive pins 59 which are directed to the side at equal intervals are planted, so that the belt 41 is driven by meshing with cogs 60 provided on the inner surface of the endless belt 41 at the same intervals. Has become.

The width of the belt 41 is wider than the width W of the drive wheel 40, and the inner side surface of the belt 41 is reinforced by the reinforcing ribs 60a. As shown in FIG. To do.

The fixed shaft 46 also has a brake panel 61 and a stopper that are commonly used.
62 is loosely fitted, and the camshaft 63 is attached to the brake panel 61.
Is inserted, and the brake shoe 64 is operated by the cam at the tip. The stopper 62 has two arms 65 and 66 at both ends of the tubular body 62a, one arm 65 is L-shaped and engages with a groove 67 on the outer surface of the brake panel 61, and the other arm. 66 is locked to a fixed pin 69 with a fork 68 (Fig. 8). Therefore, the brake panel 61 and the stopper
The pin 62 is made non-rotatable by a pin 69 and can receive a reaction force when the cam shaft 63 is rotated and braked.

An L-shaped scraper arm 70 extends further from the arm 65, and a scraper 71 is fixed to the tip of the L-shaped scraper arm 70 so as to face the outer peripheral surface of the rim 52 of the drive wheel 40. Are removed.

The guide wheels 42 and 43 are held on the wheel bracket 39 by the support shafts 72 and 73, but the support shaft 72 is inserted into the elongated hole 74 so that the front and rear positions can be adjusted. It is positioned by being engaged with the claw pieces 77 of the bracket 39.

Next, the steering ski 80 (FIG. 1) attached to the front fork 4 has a ski main body 81 formed by forming a metal plate in a gutter shape as a side view as a main portion, and an upward ridge 82 and a skid plate. 83, a rear cover 83 having a bracket 85 and the like are fixed, and a reinforcing pipe 86 curved in a loop shape is connected to the center of the front part, and the front part is formed by covering with a tapered front cover 87. There is.

A ski bracket 88 is fixedly connected to the lower end of the front fork 4 at two points, a pin 89 and an engaging portion 90, and the raised portion 82 is connected to the lower end of the ski bracket 88 by a pin 91. 88 upper bracket 92
A sub cushion 93 is interposed between the sub cushions. Steering ski
The cushion 93 is urged by the cushion 93 so that its front portion is directed upward, but is prevented from rotating beyond a certain angle by a stopper (not shown), and the load applied from the front fork 4 is used. The sub-cushion 93 is compressed and the lower surface of the ski 80 comes into close contact with the snow surface.

From the above, the power of the engine 5 is the output sprocket 34.
Is transmitted from the primary chain 35 to the primary sprocket 25 of the intermediate shaft assembly 22, and the intermediate shaft 23, the secondary sprocket rotates the drive shaft 57, that is, the drive wheel 40 via the secondary chain 36, and the pin of the drive wheel 40 is rotated. The endless belt 41 can be moved by 59 to run.

The degree of slack of the primary chain 35 is adjusted by swinging the intermediate shaft assembly 22 around the pin 31 of the arm 29 and fixing the other arm 30 with bolts 28, eyebolts 33 and the like. The degree of slack in the secondary chain 36 is determined by fixing the fixed shaft 46 to the long hole 45.
It is adjusted by moving it inside and fixing it in place with nuts 46a, eyebolts 47, etc.
Since the vehicle moves along with the fixed shaft 46, the distance between the scraper 71 and the outer peripheral surface of the drive wheel 40 is kept constant, and the scraping action of snow blocks does not change.

In the above-described embodiment, the base of the scraper arm 70 to which the scraper 71 is fixed is connected to the cylinder body 62a via the arm 65 for locking the brake panel 61, but the scraper arm 71 is directly connected to the cylinder. The scraper arm 71 may be fixed to the body 62a, or the scraper arm 71 may be provided with a locking means, such as a fork 68 provided on the other lever 66, which is movable in the longitudinal direction and prevented from swinging. 66 can be omitted.

Further, although the tubular body 62 is loosely fitted to the fixed shaft 46 in the above-mentioned embodiment, the tubular body 62 may be loosely fitted to the rotary shaft supported by the fixed shaft 46, and a pair of scrapers is provided. The arm can also be used to support the scraper on both sides.

(Effects of the Invention) As described above, according to the present invention, the base cylinder of the scraper arm is loosely fitted to the shaft of the drive wheel so that it can be moved together with the drive wheel. Therefore, the gap between the scraper and the drive wheel is always constant. Maintained at. Therefore, it is not necessary to adjust the position of the scraper when changing the positions of the drive wheels by adjusting the degree of looseness of the chain, and the adjustment work is simple and can be performed in a short time.

[Brief description of drawings]

1 is a side view of an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a perspective view of a rear fork, FIG. 4 is a front view of the same, and FIG. 5 is a front view of an intermediate shaft assembly. 6 is a side view of the same, FIG. 7 is a plan view of the rear fork, FIG. 8 is a side view of the same, and FIG. 9 is an operation explanatory view of the endless belt. 2 …… Main frame, 5 …… Engine, 12 …… Rear fork, 23 …… Intermediate shaft, 24 …… Bearing, 29,30 …… Frame, 3
5 …… Primary chain, 36 …… Secondary chain, 40 …… Drive wheel, 57 …… Drive shaft, 62a …… Cylinder body, 70 …… Scraper arm, 71 …… Scraper

Claims (1)

[Scope of utility model registration request] 1. A swing arm that supports a drive wheel so that its mounting position can be adjusted, and a scraper is arranged so as to face the outer peripheral surface of the drive wheel. In the scraper device for a drive wheel of a snowmobile, which is to be removed along with the scraper, the scraper is fixed to a scraper arm extending from a tubular body loosely fitted to the shaft of the drive wheel, and the arm extending from the tubular body is attached to the swing arm in the longitudinal direction. A scraper device for a drive wheel of a snow vehicle, characterized by being locked so as to be movable and not swingable.