JPH0545607Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Field of application for work The present invention is capable of moving the working part up and down about the horizontal axis with respect to the traveling part of the machine to which the working part is connected. The present invention relates to a type of power working vehicle that adjusts and sets the height above the ground, and particularly relates to an improvement of a height adjusting device for the working section above the ground.

(B) Prior art The above-mentioned type of power working vehicle is a walk-behind snow blower that has a snow removal section connected to the front of the machine that moves up and down around the axle of the running section. There are a variety of agricultural machines, such as power tillers and reapers, and other power-powered vehicles similar to these machines.

Therefore, in the case of this type of power working vehicle, after the machine body is swung up and down with respect to the running part around the axle, it is possible to lock the machine body to the running part at any rocking position. Generally, an adjustment locking mechanism is provided between the traveling section and the machine body, and by operating this mechanism, the height above the ground of the working section connected to the machine body can be adjusted and set. It's summery.

(c) Problems to be solved by the invention By the way, in the conventional adjustment and locking means, when the working part is adjusted to a desired height above the ground, the adjusted setting state is always locked by the adjustment and locking mechanism. Therefore, within a certain range, it was not possible to perform work in a state where the working part could move up and down freely.

Therefore, for example, when using a snow blower to remove fresh snow, there is a problem in that the work cannot be done by moving the working part very close to the ground and removing snow completely without leaving any residue.

This invention was implemented with the aim of solving such problems, and the normal adjustment of adjusting and setting the height of the working part from the ground and locking it at the set position can be performed in the same way as the conventional one. However, to provide a height adjustment device for a working part above the ground in a power working vehicle, which is improved so that the working part can be moved as close as possible to the ground when necessary.

(d) Means for solving the problem In other words, the device for adjusting the height above the ground of the working section in the present invention is such that the machine body 2 is mounted on the traveling section 6 so as to be movable up and down about the horizontal axis 7, and the machine body 2 is connected to the traveling section 6 and the machine body. 2 is provided with a coarse adjustment locking mechanism that changes and adjusts the attitude of the aircraft with respect to the traveling section and locks the aircraft. In a power working vehicle that adjusts and sets the height above the ground of the working parts 1 that are connected to each other, the rough adjustment locking mechanism is connected to the traveling part 6.
A swing operating body includes a plurality of step locking portions 10 that are swingably pivoted on the side, and a locking device that includes an engaging portion 22 provided on the body 2 side and that engages and disengages from the step locking portions. and the engaging body is finely adjusted and moved via a link mechanism connected to the engaging body while the engaging part 22 thereof is locked to any of the step locking parts 10. A fine adjustment locking mechanism is provided, and the operating tool 12 of the fine adjustment operation mechanism can be selectively locked to a locking portion formed in multiple stages, and the locking to the locking portion is prevented. The device is characterized in that it can be switched to an idle state.

(e) Effect When a power working vehicle configured as described above is operated on the road or turned around in a non-working position, the swing operating body of the rough adjustment locking mechanism is operated to adjust the position of the plurality of stages. Release the engagement between the locking part and the engaging part, and remove the working part 1.
When the machine body 2 is rotated around the horizontal axis 7 in a direction in which the workpiece 1 is lifted up, and then the engaging portion is engaged with one of the step locking portions, the working section 1 is maintained in the floating position.

When starting work after operating on the road or turning the aircraft in the above-mentioned position, when the engagement part is disengaged from the stage locking part that maintains the working part 1 in the floating position, the aircraft 2 is rotated downward about the horizontal axis 7, and the working part 1 descends in a direction approaching the ground, and when the working part 1 is roughly at the desired position, the stage engagement having the plurality of engaging parts is moved. By engaging one of the stops, the working part 1 is maintained in a roughly lowered position.

When this operation is performed and the operating tool 12 of the fine adjustment operating mechanism is then moved by a desired amount in the required direction, the engaging part moves into the step locking part in order to maintain the working part 1 in the rough lowered position. As the engaged body is moved in the required direction, the body on which this engaging body is installed moves slightly up and down about the horizontal axis 7, and the work unit 1 is moved against the ground. The height is finely adjusted, and after this, the operating tool 12 of the fine adjustment operation mechanism
By locking the workpiece 1 to one of the locking portions formed in multiple stages, the working portion 1 is maintained at a finely adjusted height above the ground.

In addition, when it is necessary to always move the working part very close to the ground, such as when removing fresh snow with a snow blower, the working part 1 can be roughly adjusted using the rough adjustment locking mechanism. If the operation tool 12 of the fine adjustment operation mechanism is kept in the adjustment position and then operated in a floating state in which it is not locked in any of the locking parts formed in multiple stages, the operation tool 12 of the fine adjustment operation mechanism can be operated. The machine body 2, that is, the working part 1, can move up and down freely within the range of freedom of movement, and the working part 1 always moves while maintaining a state as close as possible to the ground.

(f) Effects of the invention In a power working vehicle that is configured as described in the section of means for solving the problem and in which the device of the invention that operates as described above is implemented, the height of the working part above the ground can be set arbitrarily. Not only can normal adjustments be made in the same way as before, such as adjusting the height to the desired height and locking it in the set position, but in addition, when necessary, the working part can always be kept as close to the ground as possible. Since it is also possible to work while moving and moving, the usability has been significantly increased and work performance has been further improved compared to conventional systems.

(G) Embodiment Next, an embodiment in which the device of the present invention is applied to a snow blower, which is one of the power working vehicles, will be described based on the drawings.

FIG. 1 is an overall side view of a snow blower incorporating the device of the present invention, FIG. 2 is a plan view of its control section, and FIG. 3 is a rear view of the control section.

Reference numeral 2 denotes the fuselage, and a snow removal device, which is a working part 1, is connected to the front part of the aircraft, and the snow removal device includes an auger 3,
It consists of an auger cover 4, a blower casing 5 containing a blower, etc.

Reference numeral 6 denotes a traveling section consisting of a pair of left and right crawler devices, which can swing freely relative to the machine body 2 around a front wheel side drive shaft 7 supported on both sides of the machine body 2.

Reference numeral 8 denotes the rear wheel shaft of the traveling section, to which the base of a foot pedal 9, which is one of the components of the coarse adjustment locking mechanism, is pivotally connected, and the foot pedal 9 has its depression part 9a that returns upward naturally. It is energized as follows.

The coarse adjustment locking mechanism is composed of a foot pedal 9, a swing operating body 11 connected to the base thereof, and an engaging body 20 provided to the body 2.

The swing operating body 11 is formed by opening a notch, which is a stepped locking portion 10, at the edge of the circular arc hole. Further, the engaging body 20 is attached to the side of the machine body 2 with a horizontal shaft 19, and has an engaging part 22 fixedly attached to the tip thereof, which can selectively engage with the stepwise locking part 10. has been done.

An arm 18 is fixed to the horizontal shaft 19 of the engaging body 20 of such a rough adjustment locking mechanism, and this arm 18
and a lever 16 attached to a pivot 14 horizontally suspended at a separate location on the fuselage 2 are connected by a connecting rod 17 to form a link mechanism, and furthermore, the lever 16 can swing around the pivot 14, and An operating tool 12 that can be tilted laterally around a support shaft 15 perpendicular to the main shaft 15 is successively provided, and these constitute a fine adjustment operating mechanism.

Note that the operating tool 12 is tilted horizontally by the spring 2.
1 and is energized.

Reference numeral 23 denotes a control section cover, and a latch 24 for locking the operating tool 12 is fixed to an opening of the control section cover.

As shown in FIG. 2, the latch 24 has the operating tool 1
A guide groove 25 for 2 is provided, and a notch 26 for fine adjustment, which is a multi-stage locking part for locking the operating tool 12 at a required position, is formed on one edge of the groove. .

Notches 26 are formed in small increments along the direction of displacement of the operating tool 12.
6a to the notch 26b at the other end of the operating tool 12.
When the oscillating operation is performed, the engaging portion 22 engages the oscillating operating body 11.
The link mechanism is configured such that the notch of the stepwise locking portion 10 is displaced by an amount substantially the same as the interval.

A notch closing device 29 is installed near the notches 26 of the latch 24 to close the notches 26.

The illustrated notch closing device 29 has a rectangular plate sufficient to close all the notches 26 on a support shaft 31 that is rotatably supported by bearings 30, 30 provided on the control cover 23. 32, and one end of the support shaft 31 is attached to the control section 13.
The notch 26 is extended outward to form a handle portion 31a, and by rotating the handle portion 31a, the rectangular plate 32 can be placed in a state in which the notch 26 is closed (see FIG. 3) or in an open state. It is configured to switch. When the notches 26 are open, the operating tool 12 can be selectively locked, and when the notches 26 are closed, the operating tool 12 can be locked within the range set by the guide groove 25. They are now able to move freely.

In addition, the code|symbol 27 in a figure is a control handle, and 28 is a fixing member.

Next, the operation of the above configuration will be explained.

To adjust the inclination in the longitudinal direction of the aircraft to a desired constant attitude, first press the depression part 9a of the foot pedal 9 to make a rough adjustment, and at the same time hold the control handle 27 to change the inclination of the aircraft 2. The engaging portion 22 is locked to a notch that is a specific stage locking portion 10 that provides a posture close to the constant posture. With this rough adjustment, the attitude of the aircraft body 2 is restricted by the positions of the notches 10, and therefore it can only be adjusted stepwise and roughly.

Next, in order to make fine adjustments, the inclination in the longitudinal direction of the aircraft body is first coarsely adjusted to set the attitude of the aircraft body 2 as shown in FIG. 1, for example. Next, the operating tool 12 is operated to swing so that the operating tool 12 is engaged with the notches 26 of the latch 24 of the control section cover 23 that give the aircraft body 2 the above-mentioned constant attitude. In this case, notch 26...
Since these are provided in small increments, it is practically possible to change the attitude of the aircraft 2 in small increments to match the above-mentioned constant attitude.

In addition, when using the notch closing device 29 of the latch 24 part, the handle part 3 of the notch closing device 29
By rotating 1a, the notches 26 are closed as shown in FIG. 3, and the operating tool 12 is made freely movable.

As a result, the tilt of the aircraft body 2 in the longitudinal direction is reduced by the operation tool 1.
2 will be in a floating state within the range in which it is allowed to float, that is, within the range roughly equivalent to one pitch of the notches 10... Therefore, the working part 1 will be brought as close as possible to a flat surface due to its own weight. Alternatively, it is possible to work while in contact with the tool, which significantly increases usability and further improves work performance compared to conventional methods.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of a snow blower incorporating the device of the present invention, FIG. 2 is a plan view of its control section, and FIG. 3 is a rear view of the control section. 1... Working part, 2... Airframe, 6... Traveling part, 7
. . . horizontal axis, 10 . . . step locking portion, 12 . . . operating tool, 22 .

Claims (1)

[Scope of utility model registration request] The traveling section 6 allows the fuselage 2 to move up and down freely around the horizontal axis 7.
A coarse adjustment locking mechanism is provided between the traveling section 6 and the fuselage 2 that changes and adjusts the attitude of the aircraft relative to the traveling section and locks the aircraft. In a power working vehicle that adjusts and sets the height above the ground of the working part 1 connected to the machine body by rotating around an axis 7, the coarse adjustment locking mechanism is pivoted around the running part 6 so as to be able to swing freely. It is formed by a swinging operation body 11 having a plurality of stage locking parts 10 attached to the body 2, and an engaging body 20 having an engagement 22 provided on the side of the body 2 and engaging and disengaging from the stage locking parts. , a fine adjustment lock that can finely adjust and move the locking body through a link mechanism connected to the locking body while the locking portion 22 thereof is locked to one of the step locking portions 10; A stop mechanism is provided, and the operating tool 12 of the fine adjustment operating mechanism is
Power work characterized by being able to switch between a state in which the fine adjustment locking portion formed in multiple stages can be selectively locked and a floating state in which locking in the locking portion is prevented. A device for adjusting the height above the ground of working parts in vehicles.