JPH0748742Y2 - Rotary snowplow snowplow - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow removing device for a rotary snow removing vehicle.

[0002]

2. Description of the Related Art A rotary snow removing vehicle has a snow removing device attached to a front portion of a vehicle body. The rotary snow removing vehicle transfers the snow removing device to a place where the snow removing work is performed, and when the snow removing work reaches the snow removing work place, the snow removing device performs the snow removing work.

FIG. 5 and FIG. 6 are views showing an example of a rotary snow plow, and an auger 3, a blower 4, and a chute 5 are provided on a front portion of a vehicle body 1.
Is provided with a snow removing device 2 including
As a unit to raise it to a predetermined height and separate it from the road surface, lower the snow removal device 2 during snow removal work, scrape the snow accumulated on the road with the auger 3, or take in the snow accumulated on the left side of the road in advance. , Blower 4 shoots a shot 5 to a suitable place outside the road.

In a conventional snow removal vehicle, for example, as shown in FIG. 7, a snow removal device 2 includes a front frame 6 of a vehicle body, a mounting frame 7 for mounting a rear end of the snow removal device 2, and a vertical direction between them. They are connected by a pair of left and right parallelogram links which are provided with two links 8 and 9. The lower link 9 of the parallelogram link has a lower end coupled to the front end of the lower link 9 and an upper end coupled to the upper portion of the front frame 2 of the vehicle body by a hydraulic cylinder 10 whose center is the attachment end to the vehicle body front frame 6. As a result, it is possible to displace between the descending position and the ascending position shown by the one-dot chain line which has swung upwards more than that, and the parallelogram link is deformed with the opposite sides kept parallel. The snow removing device is forwarded at the ascending position and the snow removing work is performed at the descending position.

However, when the snow removing device 2 is attached to the front end of the vehicle body frame via the parallelogram link, the front overhang becomes long, the weight balance of the front wheel shaft and the rear wheel shaft is deteriorated, and the rising position and the descending position are increased. There is a drawback that the overhang changes and the operation becomes difficult and the forward view is obstructed. 40k for snow removal work especially on high-standard roads
Since the vehicle is driven at a high speed of m / H or more, it is required that the front overhang is short and the forward visibility is good.

In Japanese Patent Publication No. 61-53489, FIG.
As shown in Fig. 1, the point 1 which is considerably rearward from the front end of the body frame 11
A snow removing device 2 is attached to a front end of an arm 13 pivotally supported about 2 as a fulcrum, and is substantially vertical between a point near the front end of the arm and a point near the front end of the body frame 11 immediately above the arm. There is disclosed a snow removing device supporting elevating mechanism for a snow removing vehicle, which displaces the snow removing device 2 between an ascending position and a descending position by raising and lowering the arm by a hydraulic cylinder 14 extending in a direction.

According to this mechanism, the front overhang is shortened and the change in the overhang when the snow removing device is raised and lowered is small. However, in order to support a heavy snow removing device with one arm, the arm must be It has a heavy structure with high rigidity, and the bearing must be large.
In addition, a space for accommodating the upper arm is required in the lower part of the vehicle body in consideration of the rotation range, and the arrangement of other devices may be restricted.

By the way, when removing snow on a highway or a high-standard road by using a rotary snow remover, first, a plow snow remover collects snow on the road at the left end, and then a rotary snow remover is dispatched. It is customary to do so. However, the speed of a snow plow for high-standard roads is required to be 40 km / H or more, and an articulate type (a center pin is bent in the middle) rotary snow plow cannot be used, and there is a high possibility that it will be an integral structure. In that case, when the front steering is used, it is difficult to steer the snow, and it is difficult to process the snow accumulated on the left side of the road.

[0009]

DISCLOSURE OF THE INVENTION The present invention is directed to the above-described snow removal device lifting mechanism for a snow removal vehicle in which the snow removal device is attached to the front of the vehicle body through a conventional parallelogram link or a swing arm extending from the lower portion of the vehicle body. In view of the drawbacks, it is a first object to provide a snow removal device for a snow removal vehicle, in which the front overhang is small, the overhang does not change between the raised position and the lowered position, and the space for the lifting mechanism does not take up much space. A second object is to provide a snow removing device that facilitates the treatment of snow accumulated on the left side of the road.

[0010]

A snow removing device for a snow removing vehicle according to the present invention for solving the above first problem extends in the vertical movement direction of the snow removing device in a vertical plane orthogonal to the longitudinal direction of the vehicle body.
A hydraulic cylinder having a stroke corresponding to the amount of elevation, one end of which is attached to a member fixed to the vehicle body, and the other end of which is attached to a member fixed to the snow removing device, and snow removing parallel to the extending direction of the hydraulic cylinder. And a guide member for guiding the vertical movement of the device.

Further, in the snow removing device for solving the above-mentioned second problem, the guide direction of the hydraulic cylinder and the guide member is inclined with respect to the vertical line in a vertical plane orthogonal to the longitudinal direction of the vehicle body. It is characterized by being provided.

[0012]

According to the former structure of the snow removing device of the present invention, by expanding and contracting the hydraulic cylinder, the snow removing device is guided by the guide member to ascend and descend in the direction in which the hydraulic cylinder extends, and the vertical dimension of the elevating mechanism is The thickness of the space occupied by the hydraulic cylinder and the guide member can be set to allow for a slight margin, and the front overhang can be made extremely small. Also, the front overhang does not change during the lifting process.

Further, according to the latter construction, the guide surfaces of the hydraulic cylinder and the guide member are tilted laterally with respect to the vertical line, and surprisingly, the snow removal device is laterally moved between the raised position and the lowered position. The position of can be shifted. Therefore, at the time of forwarding, the snow removing device can be automatically moved toward the end of the road by traveling while keeping the snow removing device held centered on the center of the vehicle body and lowering the snow removing device for snow removal work.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

1 and 2 are a perspective view and a side view showing the construction of a snow removing device lifting mechanism according to the present invention. The elevating mechanism 20 has elevating mechanism frames 21 mounted on the front surface of the front frame 6 of the vehicle body and guide rollers 23 rolling along guide surfaces 22 formed on both sides of the elevating mechanism frames 21, and the snow removing device 2 is The lifting frame 24 to be mounted and the upper end thereof is attached to a bracket 25 provided on an upper member of the lifting mechanism frame 21, and the lower end thereof is attached to a bracket 26 fixed to a lower portion of the lifting frame 24, and a hydraulic pressure extending in the vertical direction is provided. It is composed of a cylinder 27. Brackets 28 for mounting this frame on the front surface of the front frame 6 are fixedly provided at four corners of the elevating mechanism frame 21, and mounting holes 29 are provided therein. In addition, at the four corners of the elevating frame 24, bolt holes 3 for mounting the snow removal device
0 is drilled.

FIG. 3 is a sectional view showing an engaged state of the guide roller 23 and the guide surface formed on the inner surface of the elevating mechanism frame 21.

Implementation of a snow removal device that allows the snow removal device that has been forwarded in the ascended position to be brought closer to the left to the ground with respect to the vehicle body and to easily handle the snow accumulated on the left side of the road The front of the example rotary snow plow is shown in FIG.

In this embodiment, the hydraulic cylinder 27 of the snow removing device elevating mechanism 20 and the guide surfaces of the elevating mechanism frame 21 are mounted so as to incline toward the left as they go downward.

When the hydraulic cylinder 27 is contracted, the snow removing device 2 is raised at the position indicated by A in the figure, that is, at the position where the center line coincides with the center line of the vehicle body, and is fed in this state. When the snow removing work is started, the hydraulic cylinder 27 is extended so that the elevating frame 24 is guided by the inclined elevating mechanism frame 21 and descends toward the left side, and at the same time, the snow removing device 2 descends toward the left side. Ground. Therefore, the vehicle body can remove snow up to the left end by the snow removing device 2 without approaching the left end of the road.

In each of the above embodiments, the hydraulic cylinder of the snow removing device elevating mechanism has an upper end attached to a member fixed to the front frame of the vehicle body and a lower end attached to a member for mounting the snow removing device. On the contrary, it is also possible to attach the lower end of the hydraulic cylinder to a member for fixing to the vehicle body and the upper end to a member for mounting the snow removing device.As a guide device of the snow removing device, a combination of a guide surface and a guide roller is used. other,
Various known types can be adopted, such as a combination of a guide rod and bearings that engage with the guide rod at two upper and lower positions.

[0021]

As described above, according to the present invention, the front overhang of the snow removing vehicle can be made shorter than the conventional one, and since the front overhang does not change due to the elevation of the snow removing device, the weight balance is lost. Easy to maneuver without Further, according to the invention of claim 2, the snow removing device can be brought close to the left side and grounded even if the vehicle body is not completely left sided on the road. Snow removal work becomes easy.

The present invention can also be applied to snowplows having a snowplow at the front end of the vehicle body other than rotary snowplows.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a snow removing device lifting mechanism according to the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a cross-sectional view showing an engaged state of the guide roller and a guide portion.

FIG. 4 is a schematic view for explaining the shape and operation of another embodiment of the present invention.

FIG. 5 is a side view of a known rotary snow plow.

FIG. 6 is a front view thereof.

FIG. 7 is a side view showing an example of a conventional snow removing device lifting mechanism.

FIG. 8 is a side view showing an example of a conventionally proposed snow removing device lifting mechanism.

[Explanation of symbols]

 1 vehicle body 2 snow removal device 3 auger 4 blower 5 chute 6 front frame 20 snow removal device lifting device 21 lifting mechanism frame (member fixed to vehicle body) 22 guide surface 23 guide roller 24 lifting frame (member fixed to snow removal device) 27 Hydraulic cylinder

Claims (2)

[Scope of utility model registration request] 1. The snow removing device for a rotary snow removal vehicle, wherein a snow removing device is attached to a front portion of a vehicle body between an ascending position suitable for forwarding and a descending position suitable for snow removing work via an elevating mechanism for elevating the snow removing device. The snow removing device has a stroke that extends in the vertical movement direction of the snow removing device in a vertical plane orthogonal to the front-rear direction of the vehicle body and has a stroke corresponding to the amount of vertical movement. One end is attached to a member fixed to the vehicle body and the other end is snow removing. A snow removing device comprising: a hydraulic cylinder attached to a member fixed to the device; and a guide member for guiding the vertical movement of the snow removing device in parallel with the extending direction of the hydraulic cylinder. 2. The guide direction of the hydraulic cylinder and the guide member is provided so as to be inclined with respect to a vertical line in a vertical plane orthogonal to the longitudinal direction of the vehicle body. The snow removal device described.