JPH07229124A - Frozen surface crushing device of earth-moving vehicle - Google Patents

Abstract

PURPOSE:To enable switching between ordinary snow removal work and frozen surface crushing work in a short time without a special driving source. CONSTITUTION:A snow removal blade 3 is provided in such a manner as to freely tilt forward and backward on the forward end of a lift arm 2 of an earth-moving vehicle having a lift arm 2 capable of vertical moving, and a frozen surface crushing means 10 moved vertically interlocking with the forward and backward tilting of the snow removal blade 3 is installed in the rear of the snow removal blade 3. The frozen surface crushing means 10 is lowered by tilting the snow removal blade 3 backward to perform crushing work for the frozen surface. Thus, switching between the snow removal work and the frozen surface crushing work can be accomplished without a special driving source in a short time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice burn crushing device for an earthmoving vehicle for treating ice burn generated on a road surface.

[0002]

2. Description of the Related Art In a snowy region, snow on the road surface is pressed against a vehicle, melts due to a rise in the temperature during the day, and freezes again due to cooling at night, which causes ice burn on the road surface. Is generated. The ice burn generated on the road surface has a mirror-like surface and tends to slip due to the passage of the vehicle, which may interfere with the passage of the vehicle or if the traffic of the vehicle is small, ruts are formed on the surface. There is a problem that causes an accident. For this reason, conventionally, various devices for removing the ice burn generated on the road surface have been proposed.

[0003] For example, in "Snow Removal Vehicle" of Japanese Utility Model Publication No. 4-19065, there is provided a scarifier blade which can be swung up and down behind a snow removal blade, and normal snow removal is performed with the scarifier tooth raised. Do the work
By lowering the scarifier, it is possible to dig and remove the ice burn.

In the "Iceburn crushing device" disclosed in Japanese Utility Model Laid-Open No. 2-125028, a plurality of tooth poles are suspended and fixed at the rear of the bucket, and the tip of the bucket is lifted by a dump cylinder to ground the tooth pole at the rear of the bucket. By doing so, the ice pole is crushed with a tooth pole.

[0005]

However, in the former snow removing vehicle, the vertical movement of the scarifier is performed manually or by a drive source such as a hydraulic cylinder. When the manual operation is performed, a large force is required for the vertical movement of the scarifier tooth. It requires a lot of labor for the work, and when the scarifier blade is frozen, there is a problem that it is difficult to move up and down manually.

When a drive source such as a hydraulic cylinder is used, the apparatus itself becomes expensive because a hydraulic cylinder and hydraulic piping are required, and when switching from the normal snow removal state to the snow removal process, first, the lift arm is raised to remove the snow removal blade. Is required to be raised, and then the lift arm is lowered after lowering the scarifier blade. Therefore, it takes time to switch and the work efficiency is poor.

On the other hand, in the latter ice burner crushing device, when the tip of the bucket is lifted, the tooth pole provided at the rear of the bucket comes into contact with the ground and becomes in the ice burner crushing condition rather than the snow removal condition. Although it is not particularly necessary and has the advantage that it can be switched in a short time, on the other hand, since the tooth pole is fixed to the rear part of the bucket, the vertical movement amount of the tooth pole a is shown in (a) and (b) of FIG. 8, the vertical movement amount of the tooth pole a is large in FIG. 8, but the member b connecting the left and right sides is small.
Therefore, when the lift arm c is lifted and the bucket is tilted forward, the member b connecting the left and right supports of the lift arm c and the tooth pole a interferes with each other.

Therefore, when the lift arm c is erroneously lifted and the bucket is tilted forward to perform the snow removal work, the lift arm c and the member b connecting the left and right supports of the tooth pole a interfere with each other and both are damaged. , There was a problem such as being unable to scrape snow with a bucket. The present invention has been made in order to improve the conventional problems, and does not require a drive source for switching between snow removal work and ice burn, and the ice burn crushing means does not interfere with the lift arm. It is intended to provide a burn crushing device.

[0009]

In order to achieve the above object, the present invention provides a snow removing blade, which can be tilted forward and backward, at the tip of the lift arm of an earthmoving vehicle equipped with a lift arm that is vertically movable. Behind the snow removing blade, there is provided an ice burner crushing means that moves up and down in conjunction with the forward and backward inclination of the snow removing blade. In addition, the ice crushing means is supported so that it rises when the snow removal blade is tilted forward, does not rise further when the forward tilt angle exceeds a certain value, and descends when the snow removal blade is tilted backward. The means is detachably attached to an arm whose tip is pivotally attached to the snow removing blade, and the tip side and the lift arm are connected by a link, and a tooth attachment member provided on the rear end side of the arm. It is composed of fire tooth.

[0010]

With the above construction, when the snow removing blade is tilted backward, the ice crushing means descends and comes into contact with the ground. Therefore, switching from the snow removing operation to the ice crushing operation and vice versa requires a dedicated drive source. It can be done in a short time without. Further, when the snow removal blade is tilted forward or the lift arm is raised, the ice burner crushing means does not approach the lift arm for a certain distance or more, so that it is possible to prevent interference between the two.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing an ice burn removing device for an earthmoving vehicle, and 2 is an exploded perspective view thereof. In FIG. 1, reference numeral 1 is a vehicle body of an earthworking vehicle such as a wheel loader, and a lift arm 2 is attached to a front portion of the lift arm 2 so as to be vertically movable.
A snow blade 3 is detachably attached to the tip of the.

The snow removing blade 3 has a blade body 3a.
And a support bracket 3b that supports the blade body 3a, and a central portion of the rear surface of the blade body 3a is pivotally attached to the support bracket 3b by a vertical pin 3c, and between the blade body 3a and the support bracket 3b. Has an angle cylinder 4 mounted horizontally, and the angle cylinder 4 allows the blade body 3 to be centered on the vertical pin 3c.
Both ends of "a" can be angled in the front-rear direction.

The rear portion of the support bracket 3b is pivotally attached to the tip of the lift arm 2 by a pin 5, and a tilt cylinder 8 connected through a link 6 and a tilt lever 7 serves as a center for the snow removal blade 3 around the pin 5. Can be tilted and the support bracket 3
A stabilizer 9 for keeping the height of the blade body 3a constant is provided at the lower part of b so as to be vertically movable.

On the other hand, an ice burner crushing means 10 is provided behind the snow removing blade 3. As shown in FIG. 2, the ice crushing means 10 has a box-shaped tooth attachment member 10a elongated in the width direction, and a pair of arms 10b are arranged in the width direction at the front portion of the tooth attachment member 10a. Has been installed. These arms 10b
The tip of the pin 3 is attached to the support 3d protruding from the lower part of the support bracket 3b of the snow removal blade 3 as shown in FIG.
The arms 10b are pivotally attached to each other, and a support 10c is projectingly provided on the outer surface of the distal end side of each arm 10b.
One end of e is pivotally attached. The other end of each link 10e is pivotally attached to a support 2a provided on the inner surface of the tip end side of the lift arm 2 via a pin 2b, and the lift arm 2 is held until the tip of the snow removal blade 3 comes into contact with the ground. The arm 10b of the ice burner crushing means 10 when lowered
Is held at a position that is slightly rearward as shown in FIG.

A plurality of tooth attachment holes 10f elongated in the front-rear direction are formed in the tooth attachment member 10a of the ice crushing means 10 at intervals in the width direction. The base end of the scarifier 12 is fitted into the tooth mounting holes 10f, and the wedge-shaped key 10 is inserted.
It is fixed by g. Above Scarifier 2
As shown in FIGS. 1 and 2, 2 is formed by a plate body bent in a substantially V shape, and has a sharp crushing blade 12a at its tip.
have.

Next, the operation of the snow removing blade 3 and the ice-burn crushing means 10 configured as described above will be described with reference to the operation explanatory views of FIGS. 4 and 5. In the case of normal snow removal using the snow removal blade 3, as shown in FIG. 1, the lift arm 2 is lowered until the tip of the snow removal blade 3 comes into contact with the ground, and the tilt cylinder 8 brings the lower surface of the snow removal blade 3 into close contact with the road surface. As described above, the snow removal blade 3 is tilted in a substantially vertical state (tilt angle of 0 degree). As a result, the arm 10b of the ice burner crushing means 10 is held in a slightly upward position, so that the tip end of the scarifier tooth 12 provided on the rear end side of the arm 10b rises above the road surface as indicated by point a in FIG. It is held in the position it was in. Next, in this state, the earthmoving vehicle is moved forward to perform snow removal work on the road surface with the snow removal blade 3. By performing the angle operation of the snow removal blade 3 with the angle cylinder 4 during the snow removal work, the snow removed snow is applied to the road shoulders and the like. Can be eliminated.

Further, when the snow removing blade 3 is used for normal snow removal from a snow-pressing work on the road surface and when the cutting blade of the snow removing blade 3 is raised, the snow removing blade 3 is tilted forward. At this time, the center B of the pin 2b pivotally attaching the lift arm 2 and the link 10e, the center A of the pin 5 pivotally attaching the tip of the lift arm 2 and the snow removing blade 3, and the snow removing blade 3 and the arm 10
Until the center D of the pin 3e pivotally attached to the tip of b becomes a straight line as shown in E of FIG. 4, the distance in the BC section becomes long, so the ∠BDC of ΔBDC sharing B and C becomes large. The scarifier blade 12 rises, and the crushing blade 12a at the tip also rises to point d in FIG. Further, when the snow removal blade 3 is tilted forward and BAC in ΔBAC goes over a straight line, the distance in the CB section becomes shorter, so the ∠BDC of ΔBDC sharing C and B is gradually reduced, whereby the scarifier device 12 Since the lift arm 2 and the scarifier blade 12 do not interfere with each other, the snow removal blade 3 can be tilted forward at an arbitrary angle. The crushing blade 12a descends to point e in FIG.

On the other hand, when shifting from the normal snow removing work to the work of crushing the ice burn generated on the road surface, the snow removing blade 3 is tilted backward. As a result, the pin is rotated clockwise around A, so the distance between CBs in ΔBAC is shortened, and this reduces the ∠BDC of ΔBDC that shares C and B, thus reducing the size of the scarifier tool 12. The tip is grounded at the point of FIG. 5b, and the snow removing blade 3 is tilted backward to move the crushing blade 12a to the position shown in FIG.
Since it can be lowered to point c, the crushing blade 12a can bite into the ice burn. Therefore, by advancing the earthmoving vehicle in this state, the ice burn generated on the road surface can be crushed by the scarifier.

In the above-described embodiment, the separate scarifiers 12 are attached to the tooth attaching member 10a. However, as shown in FIG. 6, a tooth 12 'having a comb-tooth-shaped edge 12b is formed. The mounting portion 12c may be fitted into the tooth mounting hole 10f of the tooth mounting member 10a and fixed by the key 10g.

[0020]

As described in detail above, according to the present invention, since the ice crushing means which is vertically moved in association with the front and rear inclination of the snow removing blade is provided behind the snow removing blade, a normal snow removing blade is used. When shifting from the work to the crushing work of the ice burn, the ice burn crushing means can be grounded by tilting the snow removing blade backward.
As a result, normal snow removal work to ice burn crushing work and vice versa can be performed in a short time, so work efficiency is very good, and since these can be switched without requiring a dedicated drive source, it is easy and It can be implemented at low cost. In addition, even if the lift arm is raised or the snow removal blade is tilted forward, the ice crushing means does not approach the lift arm for a certain amount or more, so the snow removal blade is tilted forward to remove the pressure snow on the road surface, Even if the lift arm is lifted to scoop up snow, there is no fear that the ice crushing means interferes with the lift arm and damages the both.

[Brief description of drawings]

FIG. 1 is a side view showing an ice-burn crushing device for an earthmoving vehicle according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an ice-burn crushing device for an earthmoving vehicle according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a part of a snow removing blade equipped with an ice crushing device for an earthmoving vehicle according to an embodiment of the present invention.

FIG. 4 is an operation explanatory view of the ice-burn crushing device for an earthmoving vehicle according to an embodiment of the present invention.

FIG. 5 is a diagram showing the relationship between the front-back inclination of the snow removal blade and the floating amount of the scarifier in the ice-burn crushing device according to the embodiment of the present invention.

FIG. 6 is a perspective view showing another form of the tooth of the ice-burn crushing device according to the embodiment of the present invention.

7A and 7B are explanatory views of a conventional example.

FIG. 8 is an explanatory diagram of another conventional example.

[Explanation of symbols]

 2 Lift arm 3 Snow removal blade 10 Iceburn crushing means 10a Tooth mounting member 10b Arm 10e Link 12 Scarifier fire tooth

Claims (4)

[Claims] 1. A snow removing blade 3 is provided at the tip of the lift arm 2 of an earthmoving vehicle having a vertically movable lift arm 2 so as to be tiltable in the front-rear direction, and the snow removing blade 3 is provided behind the snow removing blade 3. An ice-burn crushing device for an earthmoving vehicle, which is provided with an ice-burn crushing means 10 that moves up and down in conjunction with a forward and backward tilt. 2. When the snow removal blade 3 is tilted forward, it rises, and when the forward tilt angle exceeds a certain value, it does not rise further,
The ice-burn crushing device according to claim 1, further comprising an ice-burn crushing means 10 supported so as to descend when the snow removing blade 3 is tilted backward. 3. The ice burner crushing means 10 has a tip pivotally attached to the snow removing blade 3 and a tip end and a lift arm 2.
An arm 10b whose space is connected by a link 10e,
The ice burner crushing device according to claim 1 or 2, which comprises a scarifier 12 which is detachably attached to a tooth attaching member 10a provided on the rear end side of the arm 10b. 4. The scarifier 12 comprises a plurality of independent teeth and a tooth having an integral structure having a comb-teeth-shaped tip, so that these teeth can be selectively used. Ice burner crusher.