JPH10298942A - Rotary snow plow with variable snow removing width - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent auger vanes from requiring wasteful strength by installing a hydraulic cylinder at the rotation center of both auger drums, and moving the axial distance of the driven auger drum against the driving auger drum. SOLUTION: A driving auger drum 1 is fixed to a vehicle body 9 and is rotated by a drive source 10, and a driven auger drum 1' is moved in the axial direction against the driving auger drum 1 by a hydraulic cylinder 2 fitted inside the driving auger drum 1 to change the snow removing width. A ball screw or a screw spline 11 is used to connect the driving auger drum 1 and driven auger drum 1', and its pitch is made equal to that of auger vanes 3, 3'. Since the radius of the screw spline 11 is further smaller than the radius of the auger vanes 3, 3', the spiral angle against the rotation center 5 is made small, the driven auger vane 3' is easily moved and rotated and keeps the same vane interval with the driving auger vane 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow remover for roads.

[0002]

2. Description of the Related Art Conventionally, a rotary snow plow having a variable snow removal width as shown in FIG. 1 has been considered. However, since the respective positions of both auger drums 1 and 1 'for changing the snow removal width are moved to the left and right with respect to the vehicle body 9 by the hydraulic cylinders 2 and 2', the relative rotation of the drive auger drum 1 The torsion movement of the driven auger drum 1 ′ in accordance with the torsion of the auger blades 3 and 3 ′ with respect to the axial movement is attached to the tip of the driving auger blade 3 and is sandwiched between the driven auger blades 3 ′. This is performed by sliding the contact 4, and the driven auger blade 3 ′
The transmission of the rotational force is also performed by the contact 4.

[0003]

When the distance between the driven auger drum 1 'and the drive auger drum 1 is moved, that is, when the snow removal width is changed, the force used for moving both augers in the direction of the rotation axis is used as the source power. In addition, a rotational force for adjusting the torsion of the driven-side auger blade 3 ′ to the torsion of the driving-side auger blade 3 is generated by sliding of the contact 4. This means that the efficiency of the force for moving the driven auger drum 1 ′ can be reduced by the magnitude of the twist angle of the auger blades 3 and 3 ′ that are far away from the rotation center 5 in the radial direction with respect to the axis. As a result, a very large force is applied to the contact 4 and the contact 4 cannot slide over a certain angle determined by the coefficient of friction. Therefore, the torsion angle of the auger blades 3 and 3 'is increased. In other words, the pitch width of the spiral blade is limited.

Further, both auger drums 1 and 1 '
Change in the axial distance of the auger drum
The outer frame 6 supporting the drive auger drum 1 and the inner frame 6 supporting the driven auger drum 1 are provided by the hydraulic cylinders 2 and 2 ′ for movement outside the outer frame supporting the drive auger drum 1, far away from the outer frame. The bending moment applied to the rails 7 and the rail guides 8 of the two drums supporting the ′ becomes large, and strength is required.

[0005] Since the rotational force of the driven auger blade 3 'due to the rotational force of the drive source 10 is also transmitted from the contact 4, the tip of both auger blades 3 and 3' is connected to the driven auger blade 3 '. , It is necessary to bear all the rotational forces, and excessive strength is required.

[0006]

A hydraulic cylinder is installed at the center of rotation 5 of both auger drums 1 to move the driven auger drum 1 in the axial distance of the driven auger drum 1 '. If you use (ball screw or) screw spline 11 between '
These problems can be solved.

[0007]

FIG. 2 is a diagram showing a variable mechanism of the snow removal width according to the present invention. The drive auger drum 1 is fixed to a vehicle body 9 and is rotated by a drive source 10, but is mounted inside. The driven auger drum 1 ′ moves in the axial direction with respect to the driving auger drum 1 by the hydraulic cylinder 2 so as to change the snow removal width.

At this time, the drive auger drum 1 and the driven auger drum 1 'are connected by using a (ball screw or) screw spline 11, and the pitch thereof is set to the same value as the auger blades 3 and 3'. In this case, since the radius of the screw spline 11 is much smaller than the radius of the auger blades 3 and 3 ', the torsion angle with respect to the rotation center 5 is reduced, and the driven auger blade 3' is easily moved and rotated to drive. The same blade spacing as the side auger blade 3 is maintained. Also, there is virtually no need to limit the torsion angle of the auger blades 3 and 3 '.

Further, since the transmission of power to the driven auger blade 3 'is also performed from the screw spline 11, there is no load on the auger blades 3 and 3'.

In order to move the snow removal width in both directions, a hydraulic cylinder moving mechanism 13 may be used between the vehicle body 9 and the outer frame 6 supporting the driving auger drum 1 in FIG.

EXAMPLE An experiment was conducted with the structure according to the present invention, and it operated without any trouble.

[Brief description of the drawings]

FIG. 1 is a plan view showing the principle of a conventional product,

FIG. 2 is a variable mechanism diagram of a snow removal width according to the present invention.

FIG. 3 shows the relationship of this mechanism to the entire snowplow.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drive auger drum 1 'Driven auger drum 2, 2' Hydraulic cylinder 3 Drive-side auger blade 3 'Driven-side auger blade 4 Contact 5 Rotation center 6 Outer frame supporting drive auger drum 1 6' Supporting driven auger drum 1 ' Inner frame 7, 7 'Drum 1, 1' rail 8 Rail guide 9 Body 10 Drive source 11 Screw spline 12 Shooting port 13 Hydraulic cylinder 14 Chute

Claims (1)

[Claims] When the variable width is realized by dividing the auger into two while keeping the coaxial and changing the entire width including the overlapping portion, in order to keep the interval between the blades of the two augers constant, Using a ball screw or screw spline between the drive shaft and the driven shaft, the driven auger is naturally twisted and moved with respect to the drive side auger as the width is changed, and the two augers are both screw splined shafts. A rotary snow blower with a variable snow removal width, which realizes a drive so that unnecessary strength is not required for auger blades.