JPH1129914A - Mechanism for adjusting snow removal height of snowplow - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a snow removing part placed at the front of a snowplow to be easily adjusted in height through a lever operation. SOLUTION: A snow removing part is placed at the front of a machine frame 1, the machine frame is designed to be capable of rotating up and down about the front wheel support shaft of a travel device, and a lift am 35 is pivotally supported against the rear of the machine frame 1, with the cam surface 35a of the lift cam 35 made to abut to the rear wheel support shaft 14 of the travel device. An operating part is provided above the rear of the machine frame 1, and a snow-removal height adjustment lever 19 is placed at the operating part and is operatively connected to the lift cam 35 via a rod 33 so that the height of the snow removing part can be varied by rotation of the snow removal height adjustment lever 19. A spring 37 is fitted over the rod 33, and the top of the spring 37 is locked to a stay 34 projected from a handle fixed to the machine frame 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for easily adjusting the height of a snow removing section disposed in front of a snow removing machine by operating a lever.

[0002]

2. Description of the Related Art Conventionally, the height of a snow removing section arranged in front of a snow removing machine is adjustable so that snow piled higher than the ground surface on which the vehicle travels or a snow surface lower than the running surface can be removed. In the case of a large snowplow,
The cylinders were driven by the power of the engine and motor, and the screw shafts and arms were rotated to raise and lower the snow removal section so that the height could be adjusted. In addition, in the case of a small snowplow, the horsepower is small, the cost is kept low, and in order to reduce the size, the height of the snowplow can be changed by stepping on the pedal provided at the rear of the traveling device. It is configured to be rotatable around the axis of the front wheel or the rear wheel (a driving sprocket or a driven sprocket in the case of a crawler type traveling device), and a foot pedal is provided below a handle at a rear part of the body and the foot pedal is depressed. One side was lifted and locked at an arbitrary height with an adjustment lever.

[0003]

As described above, in the case of a large snow blower, the height of the snow removing section can be changed while the vehicle is running. He had to step on the pedal and change the height of the snowplow. Therefore, when the snow removal operation is resumed, if the height has not reached the desired height, the operation has to be stopped and adjusted again, and the height adjustment has been a very troublesome operation. Further, every time the snow removal height is changed, it is necessary to stop the snow removal work, so that the work efficiency has been deteriorated.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, a snow removal section is arranged at the front of the body frame, the body frame is configured to be able to move up and down and up and down around the front wheel support shaft of the traveling device, and a lifting cam is pivotally supported at the rear of the body frame. The cam surface of the cam is brought into contact with the rear wheel support shaft of the traveling device, and a driving operation unit is provided above and behind the body frame, and a snow removal height adjustment lever is disposed on the driving operation unit, and the snow removal height adjustment is performed. A lever and the elevation cam are interlocked and connected via a rod, and the height of the snow removal section can be changed by turning a snow removal height adjustment lever. Further, a spring is fitted over the rod, the upper part of the spring is engaged with a stay protruding from a handle fixed to the body frame, and a pivot shaft for pivoting between the lifting cam and the rod is provided. , Arranged rearward of the rear wheel support shaft.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a snow blower equipped with a snow removal height adjusting mechanism according to the present invention will be described. 1 is an overall side view of the snowplow, FIG. 2 is a perspective view of the same, FIG. 3 is a perspective view of a ground roller mounting portion, FIG. 4 is a plan view of an operation box, and FIG. 5 shows a snow removal height adjusting mechanism of the present invention. FIG. 6 is a side view of the snow remover in a state where the snow removing unit is raised, and FIG. 7 is a side view of the snow remover in a state where the snow remover is lowered.

Referring to FIGS. 1 and 2, the entire configuration of the snow blower will be described. A snow removing section A is provided at a front portion of the body frame 1, and the snow removing section A stores a blower in a blower cover 6 continuously provided at a front end of the body frame 1, and rotates left and right at an upper portion of the blower cover 6. An auger cover 8 containing a scraping auger 24 is disposed at the front of the blower cover 6 so as to protrude the snow throwing chute 7 as much as possible.

The snow chute 7 is rotated by turning a snow throwing change handle 23 in the left-right direction disposed on the side of a driving operation section B to be described later, thereby turning the snow chute 7 to change the snow throwing direction. I can do it. An auxiliary snow throwing chute 7a is provided at the upper end of the snow throwing chute 7, and the auxiliary snow throwing chute 7a can rotate in the vertical direction. By rotating the snow vertical change lever 20, the auxiliary snow throw chute 7a is changed in the vertical direction, and the snow throw distance can be adjusted. An auger cover 8 is provided at a front end of the blower cover 6, and a scraping auger 24 is provided horizontally in the auger cover 8. The sweeping auger 24 and the blower are simultaneously driven to rotate the scraping auger 24. The snow is crushed by the movement and scraped to the center side, blown upward by a blower, and guided by a snow throwing chute 7 so that the snow can be discharged in an arbitrary direction.

[0008] Stays 9 are projected from both sides of the rear portion of the auger cover 8, and as shown in Fig. 3, a lower portion of the support plate 2 is pivotally supported at a lower portion of the stay 9, and the support plate 2
A bolt is inserted into the upper part of the support plate and the elongated hole formed in the stay 9, so that the support plate 2 can be rotated and fixed along the elongated hole, and the ground roller 10 can be freely rotated below the support plate 2. , And the ground roller 10 is fixed with the bolt so as to have a desired height.
Is maintained at a certain height above the ground.

A loop-type handle 4 protrudes obliquely rearward and upward from the rear portions on both sides of the body frame 1, and a driving operation section B is formed above the handle 4. An operation box 5 is disposed between the upper portions of the handles 4, and a traveling clutch lever 21 and a snow removing clutch lever 22 are disposed on the handles 4 on both sides thereof, and a rear portion of the traveling clutch lever 21 is adapted to the shape of the handle 4. The traveling clutch lever 21 and the snow removing clutch lever 22 are formed in a substantially L shape in plan view.
Is a deadman clutch lever that operates only when gripped and stops when released. As shown in FIG. 4, a traveling speed change lever 18, a snow removal height adjustment lever 19, and a snow throwing vertical change lever 20 are disposed on the operation box 5.
Each of the lever guides of the snow removal height adjustment lever 19 and the snow throwing vertical change lever 20 can be rotated along the lever guides, and engagement portions are formed on the lever guides so that the height can be adjusted step by step. I have.

Then, an engine E is mounted on the body frame 1, and an output shaft protrudes from a front portion of the engine E,
Power is transmitted to the transmission case and the snow removing section A disposed in the body frame 1 via a belt from a pulley on the output shaft disposed in the belt cover 3. An HST type transmission is integrally provided in the transmission case, and a front wheel support shaft 11 protruding to both sides from the transmission case penetrates the body frame 1 and the track frame 12 to the left and right as a traveling drive shaft. The body frame 1 is supported so as to be tiltable back and forth about the front wheel support shaft 11 and is rotatable by turning a snow removal height adjusting lever 19 described later. Drive sprockets 13 are fixedly mounted on both shaft ends of the front wheel support shaft 11, and a rear wheel support shaft 14 is suspended laterally at the rear of the track frame 12, and driven sprockets 15 are rotatably driven by both ends of the rear wheel support shaft 14. And a crawler belt 16 is wound between the driven sprocket 15 and the driving sprocket 13.

Next, the snow removing height adjusting mechanism of the present invention will be described. As shown in FIG. 5, a pivot 30 is suspended in the operation box 5 above the handle 4.
An arm 31 is pivotally supported, and a base of the snow removal height adjusting lever 19 is fixed to the arm 31. The arm 31
The upper end of a rod 33 is pivotally supported at the end of the rod through a joint 32, and the joint 32 allows vertical and horizontal rotation.

The rod 33 is disposed substantially vertically, and the upper part thereof is supported by a stay 34 fixed to the handle 4 so as to be slidable up and down.
5 is fixed to a pivot shaft 36 pivotally supported. The pivot 3
A spring 37 is fitted on a rod 33 between the stay 6 and the stay 34, and biases the handle 4 to lift the handle 4 upward. In other words, a force acts on the rear side of the fuselage by its own weight so as to rotate downward around the front wheel support shaft 11, and the snow removing part A is moved around the front wheel support shaft 11 by the spring 37 against this own weight. It is urged to rotate downward.

The front upper portion of the elevating cam 35 is rotatably supported by a support plate 38 provided at the rear end of the body frame 1 by a fulcrum shaft 39. The lower surface of the elevating cam 35 serves as a cam surface 35a. 35a is formed in a substantially arc shape,
The lower surface of the cam surface 35a is brought into contact with the rear wheel support shaft 14 so as to slide on the rear wheel support shaft 14, and the pivot shaft 36 is disposed rearward of the rear wheel support shaft 14. More specifically, the pivot shaft 36 is disposed so as to be located rearward of a line connecting the rear wheel support shaft 14 and the fulcrum shaft 39 even when the snow removal height adjustment lever 19 is rotated, and the body frame is always It is located rearward of 1 so as not to interfere with other parts. A collar or a bearing is arranged on the rear wheel support shaft 14 so that the friction between the cam surface 35a and the sliding contact portion between the rear wheel support shaft 14 is reduced so that the lift cam 35 can be smoothly rotated. I have. The lifting cams 35 are arranged in parallel to the left and right to increase the strength, but the number is not limited.

The lifting cam 35 has a hook 40.
Is pivotally supported, and the engaging portion of the hook 40 is located below and is always engaged with the rear wheel support shaft 14, so that the snow removal height adjusting lever 1 is
The lift cam 35 always slides on the rear wheel support shaft 14 even when the steering wheel 9 is rotated or the handle 4 is pressed down, so that the snow removing part A descends unexpectedly, and the body swings or rattles. When the snow removal height adjustment lever 19 is rotated, the height does not change.

In such a configuration, when the snow removal height adjusting lever 19 is rotated backward to raise the snow removal section A, the rod 33 is pulled up via the arm 31 as shown in FIGS. Then, the lifting cam 35 is rotated upward about the fulcrum shaft 39, and the cam surface 35a of the lifting cam 35 is rotated.
Is made to contact the rear wheel support shaft 14 via the hook 40, the weight of the body frame 1 is also added, and the cam surface 35a slides on the rear wheel support shaft 14 so that the body Is lowered, and the snow removing part A is lifted.

When the snow removing height adjusting lever 19 is rotated forward to lower the snow removing section A, the rod 33 is pushed down via the arm 31 as shown in FIG.
The elevating cam 35 is pivoted downward about the fulcrum shaft 39, and the cam surface 35a of the elevating cam 35 slides against the rear wheel support shaft 14 to raise the body on the handle 4 side and lower the snow removing part A. At this time, since the handle 4 side is urged upward by the spring 37 via the stay 34, the operating force of the snow removal height adjustment lever 19 is reduced, and the snow removal part A can be easily lowered. It is.

[0017]

As described above, the present invention has the following advantages. That is, a snow removal section is arranged at the front of the body frame, the body frame is configured to be able to move up and down and up and down around the front wheel support shaft of the traveling device, and a lifting cam is pivotally supported at the rear of the body frame. The cam surface of the cam is brought into contact with the rear wheel support shaft of the traveling device, and a driving operation unit is provided above and behind the body frame, and a snow removal height adjustment lever is disposed on the driving operation unit, and the snow removal height adjustment is performed. The height of the snow removal section can be changed by rotating the snow removal height adjustment lever by linking the lever and the lifting / lowering cam through a rod. The height can be changed, the height can be adjusted easily according to the work, and the work efficiency can be improved. And when changing the height of the snow removing part, the cam surface slides on the rear wheel support shaft and the snow removing part moves up and down, so that the operation load is dispersed, and in the lifting mechanism,
As a result, it is possible to prevent deformation or damage due to concentration of force locally, and stable and reliable operation can be achieved.

Further, since a spring is fitted on the rod and the upper part of the spring is engaged with a stay protruding from a handle fixed to the body frame, the rear part of the body is supported by the spring force against the weight of the body frame. By urging upward, the operation force for adjusting the height of the snow removing section can be reduced, and the burden on the operator is reduced. Further, since a force for pressing the snow removing portion downward by the spring force acts, the snow removing portion does not rise, and the snow removal can be prevented.

Also, since the pivot shaft for pivoting between the elevating cam and the rod is disposed behind the rear wheel supporting shaft, the fulcrum shaft between the elevating cam and the body frame, the elevating cam and the rod The distance between the pivot shafts can be lengthened, the rotation stroke can be increased, and the operating load can be reduced, and the pivot shaft can connect the fulcrum shaft and the rear wheel support shaft. Positioned behind the connecting line, the rod does not interfere with the body frame during the elevating operation, and the rod is held substantially vertically during the elevating operation, and there is no loss in operating force,
The operation can be performed reliably.

[Brief description of the drawings]

FIG. 1 is an overall side view of a snow blower.

FIG. 2 is a perspective view of the same.

FIG. 3 is a perspective view of a ground roller attaching portion.

FIG. 4 is a plan view of the operation box.

FIG. 5 is a side view showing a snow removal height adjusting mechanism of the present invention.

FIG. 6 is a side view of the snow removing machine in a state where a snow removing section has been raised.

FIG. 7 is a side view of the snow removing machine in a state where a snow removing section is lowered.

[Explanation of symbols]

 Reference Signs List A snow removal section B operation operation section 1 body frame 4 handle 11 front wheel support shaft 14 rear wheel support shaft 19 snow removal height adjustment lever 33 rod 34 stay 35 elevating cam 35a cam surface 36 pivot shaft 37 spring

Claims (3)

[Claims] 1. A snow removing section is arranged at a front portion of a body frame, and the body frame is configured to be able to move up and down and up and down around a front wheel support shaft of a traveling device, and a lifting cam is pivotally supported at a rear portion of the body frame. Contacting the cam surface of the elevating cam with the rear wheel support shaft of the traveling device, providing a driving operation unit above and behind the body frame, and disposing a snow removal height adjusting lever in the driving operation unit; A height adjusting lever and said elevating cam are interlockingly connected via a rod, and the height of the snow removing section can be changed by rotating the snow removing height adjusting lever, wherein a snow removing height adjusting mechanism of the snow removing machine is provided. . 2. The snow removal height of a snow blower according to claim 1, wherein a spring is externally fitted on said rod, and an upper portion of said spring is engaged with a stay protruding from a handle fixed to said body frame. Adjustment mechanism. 3. A snow removing height adjusting mechanism for a snow removing machine according to claim 1, wherein a pivot shaft for pivotally supporting between the lifting cam and the rod is disposed behind the rear wheel supporting shaft. .