JPS5910206Y2 - motor scraper - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a motor scraper equipped with a suspension having a crawler track.

Most conventional motor scrapers are equipped with wheels.

For this reason, when working in soft ground, excavation capacity decreases, and accidents often occur where the excavator becomes stuck and unable to move.

This invention was made with the aim of improving this problem, and by providing a motor grader equipped with an undercarriage having crawler tracks, it was possible to work on soft ground.

This invention will be described in detail below with reference to an illustrated embodiment.

In the figure, reference numeral 1 denotes a vehicle body that can move freely by means of a leg support 2. An idler 3 is provided at the front of a track frame 2a constituting the leg support 2, and a sprocket 4 is provided at the rear. An endless crawler track 5 is wound between the tracks 4 and 4.

A frame 6 projects forward from the front of the vehicle body 1, and an auxiliary blade 8 that can be raised and lowered by a lift cylinder 7 and a steering wheel 9 are attached to the front end of the frame 6.

Further, brackets 6a are protruded from both sides of the front part of the frame 6, and these brackets 6a are pivotally connected to one end of the swing link 11 via a pin 10, and to the other end of the swing link 11. It is pivotally connected to the front part of the bowl 13 by a pin 12.

The bowl 13 is installed below the frame 6 and is constructed as follows.

That is, it is formed into a box shape with open top and rear surfaces by the side plates 13a and the bottom plate 13b, and one end of the short link 14 and one end of the long link 19 are pivotally connected by pins 26 to both rear sides.

The other end of the long link 19 is pivotally connected to the frame 6 by a pin 20, and the other end of the short link 14 is connected to a place 15.
It is pivotally connected to both sides of the upper part of the main blade 17 by pins 16 along with one end thereof.

The other end of the main blade 17 is pivotally connected to the front upper part of a support frame 18 that protrudes forward from both sides of the suspension 2, and a rear opening of the bowl 13 is provided at the front of the support frame 18. A main blade 17 is provided to close the main blade 17, and the front surface of this blade 17 is shaped into a concave curved surface.

On the other hand, the main blade 17 that closes the rear opening of the bowl 13 can open and close the opening of the bowl 13 by a blade lift cylinder 21 provided between the support frame 18 and the frame 6. The excavated earth and sand rises from the bottom opening 13C of the bowl 13 along the concave curved surface of the main blade 17, turns over, and is accommodated in the bowl 13.

Further, the rear end of the support frame 18 that supports the main blade 17 is pivotally connected to the track frame 2a via a trunnion 22.

In the figure, reference numeral 23 denotes an ejector for discharging the earth and sand contained in the bowl 13, which is moved back and forth by an ejector cylinder 24.

As described in detail above, in this invention, the suspension 2 of the self-propelled vehicle body 1 is constructed of the sprocket 4 wrapped around the crawler track 5 and the idler 3, so it has a greater traction force than that of conventional wheels. This greatly increases excavation capacity, and since the ground pressure of the foot support 2 is small, even when working on soft ground, the foot support 2 may slip, reducing excavation capacity or making it impossible to drive. There is no risk that this will happen.

In addition, since the ground is excavated by the main blade 17 attached to the front part of the support frame 18 protruding from the suspension 2, powerful excavation is possible and the excavated earth and sand are removed by the main blade 17. Since the soil is reversed while rising along a concave curved surface and loaded into the bowl 13, it does not consume much power for soil removal compared to when excavating while soil is being discharged with a blade, so the excavation capacity is increased. does not decrease.

Further, when the inside of the bowl 13 is full of earth and sand, the main blade 17 is raised by the noft cylinder 21, and the weight of the bowl 13 and the earth and sand stored in the bowl 13 is used to suspend it by the swing link 11 and the long link 19. Since the held bowl 13 retreats from the position shown in FIG. 1 to the position shown in FIG.
Insert into the bowl 13 from the rear opening of the bottom opening 13.
Since the earth and sand are prevented from falling from the bowl C, the earth and sand in the bowl 13 can be quickly transported to the destination without falling.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, with FIG. 1 being a side view during excavation, and FIG. 2 being a side view during transportation. 1 is the vehicle body, 2 is the suspension, 2a is the truck frame, 3
is an idler, 4 is a sprocket, 6 is a frame, 13 is a bowl, 17 is a main blade, and 21 is a blade lift cylinder.

Claims (1)

[Scope of utility model registration request] An endless crawler belt 5 is wound between idlers 3 and sprockets 4 provided at the front and rear of the truck frame 2a to form a suspension 2, and the frame 6 is attached to the front of the self-propelled vehicle body 1 by means of the suspension 2. A bowl 13 with an open rear surface is provided on the lower side of the frame 6, and a support frame 18 protrudes forward from both sides of the suspension 2.
A main blade 17 is provided which is movable up and down by a lift cylinder 21 provided on the frame 6, and this main blade 17 freely opens and closes the rear opening of the bowl 13, and the front surface of the main blade 17 is made into a concave curved surface. , a motor scraper configured to invert earth and sand excavated by the main blade 17 into the bowl 3 along this concave curved surface.