JPH04126912U - road milling machine - Google Patents

Abstract

(57) [Summary] [Purpose] To enable efficient cutting of road surfaces and improve the durability of the cutter. [Structure] A frame 13 is attached to a vehicle body 10 having a front wheel 11 and a rear wheel 12 so as to be movable up and down, and a pair of left and right disk type cutters 20, 20 are provided at a distance from each other at the front of the frame 13. A hydraulically driven motor 26 is connected to the hydraulically driven motor 22 so as to cut a pair of narrow grooves at intervals on the road surface.
A milling type cutter 29 driven by is provided to efficiently cut the portion between the pair of narrow grooves.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a road milling machine that cuts road surfaces such as asphalt roads.

0002

[Conventional technology]

As shown in FIGS. 1 and 2, inside the front and rear wheels 1 and 2 of a vehicle body 3 having front wheels 1 and rear wheels 2, A casing-like frame 4 is attached between the spaces so that it can be raised and lowered freely by an elevating cylinder 5. Inside, a drum-type cutter 8 with multiple conical bits 7 attached to a drum 6 can be freely rotated. A road milling machine installed on a road mill is known.

0003

[Problem that the idea aims to solve]

Such a road milling machine rotates the drum 6 around the horizontal axis to move the conical bit 7 onto the road surface. Since cutting is done by biting into the surface, the cutting resistance is large and cutting cannot be done efficiently, and the cost is low. Nical bit 7 has a lot of wear and durability is poor.

0004 Therefore, the present invention aims to provide a road milling machine that can solve the above-mentioned problems. aimed to.

[Means to solve the problem]

A frame is attached to the vehicle body so that it can be raised and lowered, and a pair of disc-type cups on the left and right sides are attached to this frame. A cutter and a milling cutter installed separately in the front and back direction.

[Effect]

A pair of disc type cutters cut a pair of narrow grooves on the road surface, and the area between the pair of grooves is The parts can be cut efficiently with a milling cutter.

[0005]

【Example】

As shown in FIG. 3, front wheels 11 and rear wheels 12 are mounted at the front and rear parts of the vehicle body 10, respectively. A pair of upper and lower casing-like frames 13 with an open bottom are installed in the front and rear intermediate portions of the vehicle body 10. It is attached so that it can be raised and lowered by a link 14, and extends between this frame 13 and the vehicle body 10. An elevating cylinder 15 is connected to the elevating cylinder 15. A drum 16 is rotatably attached to the front part of the frame 13 with a horizontal shaft 17. As shown in FIG. 4, a pair of discs 18 are attached to both axial end surfaces of the drum 16. , a plurality of conical bits 19 are provided on the outer circumferential surface of this disc 18 to create a disc-type cutter. 20, whose horizontal axis 17 is a deceleration transfer 21 and a hydraulically driven motor 22. is connected to. A milling type body 23 is rotatably supported on a vertical shaft 24 at the rear of the frame 13. This vertical shaft 24 is connected to a hydraulically driven motor 26 by a reduction transfer 25. The conical part 27 of the milling body 23 has a bit 28 as shown in FIG. A plurality of cutters 29 are attached to form a milling type cutter 29.

[0006] Next, the cutting operation of the road surface will be explained. As shown in FIGS. 6 and 7, a pair of disc type cutters 20, 20 are used to cut the road surface A. A pair of narrow grooves B and B are cut at intervals, and a cut is made between the pair of narrow grooves B and B. Since cutting is performed with a rice-type cutter 29, the conical part 27 of the milling-type cutter 29 Due to the wedge action, the part between the pair of narrow grooves B can be efficiently cut.

[0007]

[Effect of the idea]

Cut a pair of narrow grooves on the road surface at intervals using a pair of left and right disc-type cutters 20, 20. The part between the pair of narrow grooves can be cut efficiently using a milling cutter 29. Because it can cut the road surface to a specified width with good finish and efficiently, The cutting resistance of the cutter 20 and the milling cutter 29 are small, resulting in less wear. durability is improved.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional road milling machine.

FIG. 2 is a perspective view of a drum-type cutter.

FIG. 3 is a front view of the road milling machine of the present invention.

FIG. 4 is a perspective view of a disc-type cutter.

FIG. 5 is a perspective view of a milling cutter.

FIG. 6 is a cross-sectional front view of the road surface cutting state.

FIG. 7 is a plan view of the road surface cutting state.

[Explanation of symbols]

10 Vehicle body, 11 Front wheel, 12 Rear wheel, 13 Frame, 15 Lifting cylinder, 20 Disc type cutter, 29
Milling cutter.

Claims (1)

[Scope of utility model registration request] 1. A frame 13 is attached to a vehicle body 10 having a front wheel 11 and a rear wheel 12 so as to be movable up and down, and a pair of disc-type cutters 20, 20 are provided on this frame 13 at intervals in the left and right direction, 13 is a milling type cutter 29
A road cutting machine characterized in that: is provided on the rear wheel 12 side of the pair of disc-type cutters 20, 20.