JPH0112964Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to a traction device that is attached to the rear of a rotary snowplow to tow a dump truck or the like.

The efficiency of road snow removal to ensure land transportation has improved dramatically through the development and improvement of snowplows, especially rotary snowplows. By the way, on roads with heavy traffic in densely populated areas, expressway interchanges, and narrow roads, the width of the road that snowplows can use is limited, and it is not possible to throw snow to the sides of the road. Generally, so-called one-lane loading is carried out, in which the snow is loaded onto a dump truck that is linked to the rear of the snowplow.In this case, the dump truck receiving the snow thrown by the rotary snowplow has to ensure that the snow is evenly deposited on its loading platform. While reversing to load, it is necessary to maintain a constant relative distance in accordance with the forward speed of the rotary snowplow.

Conventionally, in order to maintain a constant relative distance between the dump truck and the rotary snowplow, a guide person was placed outside and the guide signaled to the driver of the dump truck. The method of towing with a rotary snowplow has been adopted, but both methods lack reliability and safety, and the drivers of the rotary snowplow and dump truck have the disadvantage of requiring skill to operate and being extremely fatigued. .

In addition, since the time required to load one dump truck is on the order of 30 seconds to several minutes, the method of connecting the dump truck and snowplow with a wire rope requires very frequent connection and disconnection, which makes the work difficult. In addition to problems such as the time-consuming process that reduces the operating efficiency of the snowplow, the above-mentioned drawbacks such as the loss of safety and reliability due to rushing the work become increasingly noticeable.

The present invention was developed in view of the above circumstances, and its purpose is to provide a traction device for a snowplow that can safely and easily connect and disconnect a snowplow and a dump truck with a simple operation. It's about doing. Hereinafter, the present invention will be explained in detail with reference to the drawings.

Figures 1 to 4 show an embodiment of the present invention, and reference numeral 1 in the figures is a two-stage rotary snowplow. It consists of a running vehicle 2 and a snow removal device 3 that is attached to the front end of the self-propelled vehicle 2 and driven by the drive device described above. As is conventionally known, this snow removal device 3 is rotatably installed at the front end of a snow removal machine frame 5, and has an auger 4 that cuts snow accumulated on the road surface and gathers it in the center.
And, behind this auger 4, the snow blower frame 5
A snow throwing device having a blower case 7 which is supported by a blower case 7 and has a snow throwing port 6 on the upper part thereof, and a blower blade which is installed in the blower case 7 and which throws snow taken in by the auger 4. It is composed of a blower 8 and a chute 9 attached to the snow throwing spout 6.

A slider device 11 is installed on the frame 10 of the self-propelled vehicle 2, and the slider device 11 is provided to be movable up and down by a link mechanism 12, and rotatable in the left and right direction (inside the horizontal plane). a slider main body 13, an extendable slider piece 14 provided on the front part of the slider main body 13 so as to be able to extend and retract from the slider main body 13;
A variable snow throwing angle slider piece 1 is provided to be able to freely rotate up and down around the rear end of the slider body 13.
It consists of 5.

In addition, at the rear end of the self-propelled vehicle 2, a snow transport vehicle 1 such as a dump truck that is interlocked from the rear of the snowplow 1 is provided.
A traction device 17 for towing the mobile vehicle 2 is supported by a pin 19 provided on a support metal fitting 19a fixed to the self-propelled vehicle 2, and is rotatable up and down. The traction device is connected by pins 20 and 21 between the receiving metal fitting 19b above the pin 19 at the rear end of the self-propelled vehicle 2 and one end of the rotating portion 18 at the base end of the traction device 17. A hydraulic cylinder 22 is provided for rotating the rotating portion 17, and a buffer mechanism 23 is provided at the other end of the rotating portion 18. This buffer mechanism 2
3, a movable shaft 25 connected to a traction body 24 is inserted into the cylinder 23a so as to be slidable in the axial direction, and a sliding head 25a formed at one end of the movable shaft 25 extends from both sides of the movable shaft 25. It is housed inside the cylindrical body 23a and is sandwiched between a pair of springs 26 and 27 which are prevented from coming off by a lid 23b.
Further, the other end of the movable shaft 25 and the root end of a hook 28 having an upwardly opening opening 28a at its tip are connected by a pair of bolts 29.
A plurality of holes 25b (four in this embodiment) through which these bolts 29 are inserted are bored at the other end of the sliding shaft 25 along the axial direction at intervals equal to the interval between the pair of bolts 29. . The traction device 17 is configured to hook the opening 28a of the hook 28 to a bumper 31 provided at the rear end of the frame 30 of the snow transport vehicle 16.

Furthermore, the hydraulic cylinder 22 of the traction device 17
A directional control valve 34 is connected via piping 32 and 33, and the directional control valve 34 is connected to a hydraulic pump 36 via a piping 35. Note that the pipes 32 and 35 are provided with pressure control valves 37 and 38.

Next, when the snow carrying vehicle 16 is towed by the traction device 17 configured as described above, first, the hydraulic cylinder 22 is operated to rotate the traction body 24 downward. Next, the snow transport vehicle 16 is made to approach the snowplow 1 in a backward state. When the opening 28a of the hook 28 reaches below the bumper 31 provided at the rear end of the frame 30 of the snow transport vehicle 16, the hydraulic cylinder 22 is activated to rotate the towing body 24 upward. The bumper 31 of the snow transport vehicle 16 is hooked onto the hook 28. Then,
The snow removal vehicle 1 and the snow transport vehicle 16 are connected with each other at a constant interval, so that snow can be loaded onto the snow transport vehicle 16 without any trouble. At this time, the buffer mechanism 2
3, even if there is some misalignment between the opening 28a and the bumper 31, the engagement can be made smoothly. In addition, by setting the oil pressure of the hydraulic cylinder 22 to an appropriate value depending on the weight of the snow transport vehicle 16 and the condition of the cushion, an appropriate state is maintained in which the hook 28 and the bumper 31 are not disengaged during driving. can be held. Further, even if the snowplow 1 stops, starts, or turns, the shock is absorbed by the buffer mechanism 23 of the traction device 17, so the snow transport vehicle 16 can smoothly follow the movement of the snowplow 1. When the work of loading snow onto the dump truck 16 is completed, the hydraulic cylinder 22 is activated to release the towing.

Note that by changing the connection position between the bolt 29 and the bolt insertion hole 25b on the other end side of the sliding shaft 25, the length of the traction body 24 can be adjusted without reducing the strength of the connection. , snow transport vehicle 16
Can accommodate differences in rear structure.

As explained above, this idea is such that a snow plow equipped with an auger that scrapes snow that accumulates on the road surface while driving and a blower that throws the scraped snow pulls a dump truck receiving the thrown snow. This is a traction device for a snowplow, which includes a cylindrical body whose base end is connected to the end of the snowplow with a pin so that it can be raised and lowered freely, and a shock absorber that slides on the tip side of the cylindrical body via a buffer spring. a sliding shaft that is freely fitted; a hook that is attached to the tip of the sliding shaft so that its fixed position can be changed in the longitudinal direction with a bolt; and that the hook has an opening that opens upward to engage with a dump truck; It consists of a hydraulic cylinder installed between the cylinder and the snowplow to raise and lower the cylinder, so it can be reliably and quickly connected to the bumper or frame of a snow transport vehicle such as a dump truck. It can be released and is ideal for repeated snow removal work where dump trucks (11 ton vehicles) etc. become full in 30 seconds due to the amount of snow loaded, and it is ideal for snow removal operations such as dump trucks etc. that are caused by dry running on slopes or driving mistakes. This eliminates rear-end collisions with vehicles and accidents resulting in injury or death when hooking wire ropes, making it possible to perform snow removal and loading operations safely and easily. In addition, since it is equipped with a buffer mechanism, even if the snowplow makes sudden changes in movement such as starting, stopping, accelerating, decelerating, or turning, the change in movement will not be easily transmitted to the dump truck, etc. has excellent effects such as being able to follow and move smoothly. In addition, the hook and movable shaft are connected with bolts, and multiple bolt holes are provided so that the fixing position can be changed, so there is no risk of the two being disconnected during snow removal work, and it is relatively easy to use. The length can be adjusted to suit the type of snow transport vehicle with simple work.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a side view showing a snowplow equipped with a traction device according to the present invention, Figure 2 is a plan view, and Figure 3 is a side view of a snowplow equipped with a traction device according to the present invention. The side view and FIG. 4 are piping diagrams showing the hydraulic circuit. 1...2-stage rotary snowplow, 4...
Auger, 8... Snow blower, 19... Pin, 2
2...Hydraulic cylinder, 23a...Cylinder body, 26,2
7...Buffer spring, 28...Hook, 28a...
Aperture.

Claims (1)

[Scope of Claim for Utility Model Registration] A snow plow equipped with an auger that scrapes snow that accumulates on the road surface while driving and a blower that throws the scraped snow is used to tow a dump truck that receives thrown snow. A traction device for a snowplow, which includes a cylindrical body whose base end is connected to the end of the snowplow with a pin so that it can be tilted up and down, and a buffer spring on the tip side of the cylindrical body so that it can be slid freely. A fitted sliding shaft, a hook that is attached to the tip of the sliding shaft so that its fixed position can be changed in the longitudinal direction with a bolt, and has an opening that opens upward to engage with a dump truck, and the tube. A traction device for a snowplow, comprising a hydraulic cylinder installed between the body and the snowplow to raise and lower the cylindrical body.