JPH09125332A - Ski device for holding working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hardly receive a shock from an obstacle at grounding, and prevent noise and the like from generating at non-grounding, in a ski device for holding a working machine at a fixed level from a vehicle running plane. SOLUTION: The base end fitting plate 22 of a supporting bracket 21 is fixed to the back side of a working machine 13, and a height adjustable supporting rod 25 is mounted on the cylinder part 24 on the extreme end of the supporting bracket 21. A ski main body 32 is fitted to the lower end part of the supporting rod 25 capably of being shaked in the optional direction through a ball joint 31. The ski main body 32 is provided with a spherical surface grounding part 32a of convex-lens-shape, and hence running resistance on the ground surface can be decreased. The degree of freedom of movement of the ski main body 32 is large by the ball joint 31, and a shock can be avoided even at contacting with an obstacle in any direction. Movement of the ski main body 32 is compact with no possibility to contact with the working machine 13 without generating noise and the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ski device for holding a work device for holding a work device such as a blade in a snow work vehicle or an ice work vehicle at a constant level from the traveling surface of the vehicle. .

[0002]

2. Description of the Related Art FIG. 2 shows a conventional ski device disclosed in Japanese Utility Model Publication No. 5-16295. This ski device is a working device 1 such as a blade attached to a crawler vehicle.
As shown in FIG. 2A, a vertical slide guide 2 is provided on the back surface of the work device 1, and the slide bracket 3 can be vertically moved on the slide guide 2. The upper part of the swing arm 5 is horizontally swingably fitted to the slide bracket 3 via the vertical swing shaft 4, and the sled-shaped ski body 6 is fitted to the lower part of the swing arm 5. A height adjustment mechanism 9 for adjusting the height of the ski body 6 by axially supporting a bracket 7 integrated with the above by a horizontal pin 8 and slidingly adjusting the slide bracket 3 above the swing shaft 4.
Is provided.

As shown in FIG. 2 (B), the ski body 6 is formed of a sheet metal into a rectangular shape, and as shown in FIGS. 2 (C) to (D), the working device 1 with respect to the traveling direction.
When the angle changes, the swing arm 5 is moved around the swing shaft 4 in conjunction with the movement of the work device 1 so that the longitudinal direction of the ski body 6 is always kept in the traveling direction.
Swings greatly. On the other hand, the ski body 6 can perform only a swinging motion centered on the pin 8.

Japanese Utility Model Laid-Open No. 55-17823 discloses a ski device having a cup-shaped ski body. The ski body is pivotally supported by a horizontal pin at the lower part of a support arm. The point that the grounding surface of the ski body is formed to be a plane is similar to the ski device shown in FIG.

[0005]

In these conventional devices, both the sled-shaped ski body 6 and the cup-shaped ski body are in contact with the ground surface by the ground plane 6a, and the ski body 6 is free to move. Since the degree is limited to the vertical swinging motion centered around the pin 8, if an obstacle such as a stone or a manhole cover is projected on the ground surface when working in the grounded state, the ski body 6 will be grounded. The front end corner of the flat surface 6a may be caught by an obstacle, and the ski device may be directly impacted and damaged.

Since the swing arm 5 is attached so as to freely swing in conjunction with the movement of the working apparatus 1 as shown in FIGS. 2 (C) to 2 (D), the ski body 6 is attached. When the working device 1 is shaken up and down in the non-grounded state floating above the ground surface, the swing arm 5 and the ski body 6 swing greatly and hit the working device 1 such as a blade, which causes noise and impact.

The present invention has been made in view of the above circumstances, and in a ski device for holding a working device at a constant level from the running surface of a vehicle, it is less susceptible to an impact from an obstacle when touching the ground, and An object of the present invention is to provide a ski device that can prevent noise and the like from occurring when touching down.

[0008]

According to a first aspect of the present invention, a ski body is attached to a working device via a height-adjustable supporting portion, and the working device is held at a set level. A ski device for holding a working device, wherein a ski body having a spherical ground contact portion is attached to a lower end portion of the supporting portion via a ball joint so as to swing in any direction.

Even if the spherical grounding portion of the ski body comes into contact with an obstacle in the grounded state, the ski body does not have a corner portion that catches on the obstacle due to the spherical grounding portion, and an arbitrary ball joint is used. It is possible to dodge the impact acting from an obstacle by swinging in a compact and sensitive direction.

According to a second aspect of the present invention, in the ski device for holding the working device according to the first aspect, a supporting portion is fixed to the working device.

Further, even in the non-grounded state, the supporting portion fixed to the working device does not perform the swinging operation, and the ski body only makes a small swinging motion at the ball joint, so that the supporting portion works by a large swinging operation. It is possible to prevent the generation of noise or impact that occurs when the device collides with the device.

According to a third aspect of the present invention, in the ski device for holding the working device according to the first aspect, the ski body is detachably provided to the supporting portion.

When the spherical ground contact portion of the ski body is worn out and cannot be used, only the ski body is removed from the support portion and replaced with a new one.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

As shown in FIG. 1C, for example, in a snow working vehicle, a working device 13 such as a blade is attached to the front side of a crawler type vehicle 11 via an arm 12. This working device 13 can be moved up and down by a lift cylinder (not shown), and is provided with ski devices 14 according to the present invention on the back sides of both left and right sides, and the working device 13 is mounted on a vehicle traveling surface (snow surface, etc.). ) To the set level.

As shown in FIG. 1A, in the ski device 14, the base end mounting plate 22 of the support bracket 21 is fixed to the back surface of the working device 13 with bolts 23, and
A support rod (25) is fitted in a cylindrical portion (24) integrally formed at the tip of (21) so that its height can be adjusted. The support bracket 21, the cylindrical portion 24, and the support rod 25 constitute a support portion whose height can be adjusted.

A height adjusting mechanism 26 for adjusting the height of the support rod 25 is such that the support rod 25 is slidably fitted only in the vertical direction by key fitting, spline fitting or the like on the cylindrical portion 24, The non-screw part of the screw 27 is rotatably engaged with the upper part of the cylindrical part 24, and the screw part of the screw 27 is screwed into the upper part of the support rod 25 in the cylindrical part 24. The screw 27 is rotated by the handle 28.

As shown in FIG. 1 (B), the ski body 32 can be swung in any direction by the ball joint 31 at the lower end of the support rod 25 which is height-adjustable in this way. , And the bolt 34 screwed in from the mounting plate 33
It is detachably attached.

The ball joint 31 is a support rod 25.
A spherical portion 41 integrally formed at the lower end of the spherical portion 41, a ball receiving portion 42 that is fitted with the lower half of the spherical portion 41 and integrally includes the mounting plate 33, and a bolt 43 on the upper surface of the ball receiving portion 42. And a ball pressing portion 44 that presses the upper half of the spherical portion 41 and is mounted by the ball joint 31 in a non-restrictive manner without restricting the swing direction of the ski body 32.

The ski body 32 has a spherical grounding portion 32a formed in a convex lens shape as a whole on the lower side of a circular flat surface portion 32b fixed to the mounting plate 33. The convex lens shape is forged. , Casting, machining (cutting, grinding) or a combination thereof.

Next, the operation of this embodiment will be described.
Since the ski body 32 has a convex lens-shaped spherical ground contact portion 32a, even if the spherical ground contact portion 32a and an obstacle come into contact with each other from any direction when the ski body 32 is in the ground contact state, the spherical ground contact portion 32a will not be obstructed. There is no corner that catches things,
The running resistance (contact resistance) from the ground surface can be reduced, and the ski body 32 has a large degree of freedom of movement due to the ball joint 31, so that the ball joint 31 can contact the spherical ground contact portion 32a regardless of the direction in which the obstacle comes into contact. It is possible to dodge the impact from an obstacle by making a small and sensitive swinging motion.

On the other hand, even when the ski body 32 is not grounded, as shown in FIG. 1 (C), the support bracket 21 fixed to the working device 13 does not swing, and only the ski body 32 is moved. Since the ball joint 31 makes a compact swinging motion in any direction, there is no risk of the ski body 32 colliding with the working device 13, and the generation of noise and impact as in conventional cases can be prevented.

When the spherical grounding portion 32a of the ski body 32 is worn out and cannot be used, the bolt 34 is removed, only the ski body 32 is removed from the support portion, and the ski body is replaced with a new ski body.

Finally, the ski device of the present invention is not limited in its use to holding the working device of a snow work vehicle or an ice work vehicle, but is used for example in the recycled roadbed construction method disclosed in Japanese Utility Model Publication No. 2-1144. It can also be used when a working device such as a rotor for scraping and crushing a roadbed is held at a constant level from the roadbed surface like a stabilizer.

[0025]

According to the invention described in claim 1, the spherical ground contact portion provided on the ski body has no corner portion that catches an obstacle protruding to the ground surface in any direction, and thus the obstacle does not interfere with the obstacle. Since the ski body attached by the ball joint has a large degree of freedom of movement and can swing in a compact direction in any direction, it will not be impacted by the collision of Withdrawal reaction can be performed with a high sensitivity to shocks, and the shocks can be easily avoided, and damage to the support portion and ski body can be effectively prevented, and strength can be improved.

The ball joint and the spherical grounding portion can simplify the mounting structure and the shape of the ski body, reduce the number of parts and the manufacturing process, and provide the ski device at a low cost.

According to the second aspect of the present invention, since the supporting portion is fixed to the working device, even if the working device is tilted to the left, right, up and down in the non-grounded state in which the ski body is levitated, the ski body uses the ball joint. Since the swinging motion is small and the swinging motion is not large, the swinging motion does not hit the working device, and the noise and impact caused by the swinging motion can be prevented.

According to the third aspect of the present invention, since the ski body is detachably provided to the support portion, when the spherical ground contact portion of the ski body is worn out and cannot be used, the ski body is removed from the support portion. Only the part can be removed and replaced with a new one. Partial replacement makes maintenance easy and economical.

[Brief description of the drawings]

1A is a front view showing a ski device for holding a work device according to the present invention, FIG. 1B is a sectional view taken along line BB in FIG. 1A, and FIG. It is a top view showing the state of.

2A is a partially cutaway front view showing a conventional ski device for holding a working device, FIG. 2B is a plan view of the ski body, and FIG. 2C is a view showing the working device at right angles to the traveling direction of the vehicle. FIG. 3D is a plan view showing a state in which the working device is operated, and FIG.

[Explanation of symbols] 13 Working device 21, 24, 25 Support 31 Ball joint 32 Ski body 32a Spherical grounding part

Claims (3)

[Claims] 1. A ski device for holding a work device, wherein a ski body is mounted on a work device via a height-adjustable support part to hold the work device at a set level, wherein a ball is provided at a lower end portion of the support part. A ski device for holding a working device, wherein a ski body having a spherical grounding portion is attached via a joint so that the ski body can be swung in any direction. 2. The ski device for holding a work device according to claim 1, wherein a supporting portion is fixed to the work device. 3. The ski device for holding a work device according to claim 1, wherein the ski body is detachably provided to the support portion.