JPH026094Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a hydraulic hose storage device for a chute rotating part of a rotary snowplow, etc., which supplies hydraulic oil from a non-swivelling part to a hydraulic operating mechanism provided in a chute part that swings by a swing bearing mechanism. .

The rotary snowplow or the rotary snowplow's chute device adjusts the position and direction of the snow thrower appropriately depending on the content of the snow removal work, and also adjusts its height when directly throwing snow from a blower or when forwarding the snowplow. It needs to be as low as possible. Therefore, the chute device is usually rotatably attached to the snow removal device frame or the blower case attached to the snow removal device frame via a swing bearing, and is configured to be extendable and retractable with multiple chute members, and has a cap provided at the tip. The snow throwing direction can be adjusted by changing the opening degree.

The expansion and contraction of the chute body and the opening and closing of the cap are normally performed by a hydraulic mechanism such as a hydraulic cylinder installed on the tip side of the swing bearing, and the hydraulic fluid is supplied from the non-swivel side of the snow removal frame or blower case through a hydraulic hose. will be supplied.

For example, in the chute device shown in FIG. 1, the chute device 1 is rotatably attached to the discharge port 2a of the blower case 2 via a swing bearing mechanism 8, and can be folded over a cylindrical chute 3. It is equipped with a cap consisting of three members 4, 5, and 6 that can be opened. The cap members 4, 5, and 6 are overlapped by the hydraulic cylinder 7a around the point P, and the direction of snow throwing can be changed.
The hydraulic cylinder 7b allows the stacked and folded cap to be lowered to a position surrounding the chute 3, as shown by the chain dots in the figure.

When two sets of hydraulic cylinders are installed as in this example, a total of four hydraulic hoses are required, two reciprocating for each pair of cylinders, but as mentioned above, the hydraulic hoses are connected from the non-swivel part. Since the hydraulic hose is piped across the swing section, in order for the chute device to swing freely, it is necessary to provide the hydraulic hose with a margin (sag) corresponding to the amount of swing of the chute. The larger the turning angle of the chute, the larger the hose must have a margin, and the hose wraps around the chute as it turns, making it difficult to secure the hose.

Especially for those with integrated blower and chute structure,
When the blower case rotates, the chute also rotates integrally, and it is necessary to configure the structure so that interference between the snow removal frame, chain case, etc. and the hose is avoided.

On the other hand, due to the characteristics of the snow removal device, not only snow removal, but also snow scattered from its own chute due to snow removal adheres to this area, and even more snow adheres to this area during snowfall. Accumulated snow freezes due to the cold temperatures and prevents the hydraulic hose from bending freely. Conventionally, as a countermeasure, the entire hydraulic hose is covered with a cover and the joints are sealed with gaskets. However, because the cover is large and has a complicated shape, fine snow that is removed or scattered from the joints of the cover can be trapped inside the cover. As the temperature rises, it melts, and as the temperature drops, it freezes and becomes ice-like. If this ice-like snow develops and wraps around the hose, it will inhibit the free movement of the hose and cause damage to the chute device. Not only will the hose not be able to rotate smoothly, but the hose will eventually break.

This invention provides a hose storage device for a chute swivel bearing that solves the above-mentioned problems associated with hydraulic hoses for hydraulic operating mechanisms such as chute expansion/contraction and cap opening/closing, which are unavoidable in a rotating chute device. The purpose is to

Hereinafter, this invention will be explained in detail based on drawings showing embodiments thereof.

FIGS. 2 and 3 are drawings showing an embodiment in which the present invention is applied to the chute device explained in FIG. Cylindrical chute 3
A short cylindrical intermediate snow throwing tube 10 having flanges 11 and 12 at both ends is provided between the two.
An annular hydraulic hose duct 13 is provided surrounding the intermediate snow throwing tube 10. The inner side wall of the hose duct 13 is formed of the cylindrical wall 10 of the rotating intermediate snow-throwing tube itself, and the outer side wall 14 is fixed to the discharge port flange 2a of the blower case, which is a non-swivel portion. An annular flat plate 1 is provided on the upper part of the outer side wall 14.
5 is fixed, and the ceiling of the hose duct 13 is formed by this and the upper flange 11 of the intermediate snow-throwing tube, and the ceiling of the hose duct 13 is formed by the ceiling of the hose duct 13. 13 is isolated from the outside. The intermediate snow-throwing tube upper flange 11 and the annular flat plate 15 overlap with each other with almost no gap, so that they can be displaced relative to each other when the chute turns.

The hose duct 13 has the required number of hydraulic cylinders (in the case of the figure, four cylinders for each hydraulic cylinder for extending and retracting the chute and for opening and closing the cap) with a length corresponding to the amount of deflection required for the amount of rotation of the chute. As shown in FIG. 2, the hose 16 is
Stored in glyphs. One end of each hose 16 is connected to a hydraulic pipe 18 fixed to the rotating section via a hose joint 17 fixed to the outer surface of the intermediate snow throwing tube 10 forming the inner side wall. The other end of each hose 16 is connected to a non-swivel hydraulic pipe (not shown) via a hose joint 19 fixed to the outer side plate 14.

Furthermore, a thin elastic spring plate 20 is similarly arranged in a U-shape along the inside of the hose 16 which is housed in a U-shape in a horizontal plane within the hose duct 13 . Both ends of the spring plate 20 are connected to the intermediate snow throwing tube 10 and the outer side plate 1 near the end of the hose 16, respectively.
It is fixed with a bolt 23 to holding members 21 and 22 which are fixedly provided to the holder 4.

Since this device is constructed as described above, the chute 3 and the intermediate snow throwing tube 10 are
When the hydraulic hose 16, which was initially in the state shown by the solid line, turns by an angle θ as shown in FIG.
The position of the curved part of the hose 16 gradually changes as the position of the curved part of the hose 16 changes to 1 shown by the chain line in the figure.
It is displaced to the state of 6'. In this case, intermediate snow thrower 1
A flange 12 protrudes outward from the lower end of the hose 16, and a stepped portion is formed on the inside of the lower side of the hose attachment portion of the outer side wall 14, so that the hose 16 is supported by these and does not hang down. The chute is always housed in the hose duct 13 and displaced while maintaining its U-shape, allowing it to turn smoothly, and since it does not require a large and complicated hose storage case as in the past, it has an easily sealed structure. This makes it possible to minimize powder snow from entering the hose duct, and prevent the above-mentioned troubles caused by freezing inside the duct.

By the way, when starting at a low temperature, the temperature of the hose and the hydraulic oil inside the hose is low, and the rubber that makes up the hose loses its flexibility and hardens, so if there is nothing inside the U-shaped hose. The part that was initially in the U-shaped curved part will remain curved and its position will move as the chute turns, allowing it to be smoothly displaced while closely following the side wall of the duct. It disappears. Since four hoses 16 are disposed inside the duct 13, when the curved hoses are displaced as the chute turns as described above, the U-shaped curved portion protrudes to its maximum extent in the state shown in Fig. 5a. When the chute turns and the end A, which is fixed to the intermediate snow throwing tube 10, comes to the position A', the point C will come to the position shown in FIG. 5b. As a result, the rubber hose between c and f hardens and does not become straight at section f, which is adjacent to point C. As shown in the figure, the section f protrudes inside the U shape, and finally
As shown in Figure c, part f contacts the hose on the opposite side,
In even worse cases, it can get between the hoses that are arranged vertically. The coefficient of friction between the hose and the duct wall is small and it is easy to slip, whereas hoses made of rubber have a high coefficient of friction, so when hoses on opposite sides of the duct come into contact with each other, the surface wears down and the parts become damaged. As the rigidity of the hose decreases, the area becomes more prone to bending.
The damage progresses rapidly and eventually leads to failure.

However, in the device of this embodiment, the
As shown in the figure, a thin elastic spring plate 20 is provided along the inside of the U-shaped hose 16 and has both ends fixed near the points where the ends of the hose are fixed to the duct side walls 10 and 14. Therefore, as the chute turns, the spring plate 20 is displaced while maintaining the U-shape like the hose 16, and even if the chute is started in a cold state and the curved part of the hose is hardened, the spring plate 20 The spring plate 2 is pressed and corrected to some extent.
Even if 0 is pushed inward by the part f in Fig. 5 of the hose, the hoses on both sides will not come into direct contact with each other, and the hose on the opposite side that has protruded between the upper and lower hoses will not enter, and the hoses will not come into contact with each other. slides on the spring plate 20 with low friction, and the arrangement of the hoses is not impaired.Although the upper and lower hoses may come into contact with each other, there is no relative displacement between them. The above-mentioned problem will not occur if the

As described above, according to the present invention, the hydraulic hose storage device of the chute rotation bearing of a snowplow etc. has a small and simple shape, the problem of freezing due to snow entering from the outside is solved, and the U By installing a thin spring plate along the inside of the hose stored in the shape of a letter, it is possible to smoothly displace the hose even if the hose is hardened when starting the chute rotation in cold weather. A remarkable effect can be obtained in smoothing the turning operation and improving the durability of the hydraulic hose.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of a conventional chute device such as a rotary snowplow, Fig. 2 is a horizontal sectional view of the hose storage duct of the present invention, and Fig. 3 is a sectional view taken along the - line in Fig. 2; FIG. 4 is a diagram illustrating the effect thereof, and FIG. 5 is a diagram illustrating the problem caused when the spring plate of the above embodiment is missing. 3...Chute, 8...Swivel bearing, 10...Intermediate snow throwing tube (duct inner side wall), 13...Hose duct, 14...Duct outer side wall, 16...Hydraulic hose, 20...Elastic thin plate.

Claims (1)

[Scope of utility model registration request] In a hydraulic hose storage device for a chute swing bearing part of a rotary snowplow, etc., which supplies hydraulic oil from a non-swivel part to a hydraulic operating mechanism provided in a chute part that swings by a swing bearing, the swing bearing part or the chute adjacent thereto is A surrounding annular hydraulic hose duct is provided, one of the inner and outer side walls of the duct is fixed to the rotating part and the other is fixed to the non-swivel part so as to be displaced relative to each other, the inner and outer side walls Fix both ends to the duct and leave the middle free and arrange it inside the duct in a U-shape, as well as inside the hydraulic hose arranged in the U-shape above, almost along this.
1. A hose storage device comprising elastic thin plates fixed at both ends to inner and outer side walls of a duct, respectively.