JPS59371Y2 - Running stabilization device for continuous trench excavation machine - Google Patents

Description

[Detailed description of the invention] This invention relates to a running stabilizing device for a continuous trench excavation machine that continuously excavates trenches for laying water, sewerage, electric cables, etc.

The purpose of this invention is to provide a running stabilizing device for a continuous trench excavating machine in which a digging reaction force support mechanism that supports the digging reaction force during ditch digging stabilizes the vehicle body when the self-propelled vehicle is running. To enable a self-propelled vehicle with a working machine attached to the side of the vehicle body to travel safely.

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

In the figure, 1 is a self-propelled vehicle that has a power engine (not shown) mounted on the front part of the vehicle body 1a.
A steering wheel 2 is provided on the rear side of the vehicle body 1a, and a single drive wheel 4 is located at a position closer to the working machine 3 provided on the side of the vehicle body 1a.
is provided.

Further, a driver's seat 5 is provided above the rear of the vehicle body 1a, and various control mechanisms 6 necessary for operating the self-propelled vehicle and various control mechanisms necessary for operating the work equipment 3 are provided near the driver's seat 5. An operating mechanism (not shown), a hydraulic oil tank 7, a fuel tank 8, etc. are installed.

On the other hand, the work equipment 3 installed on the side of the vehicle body 1a is
The lower end of the swing link 10 is pivotally attached to the lower part of the member 9 via a bracket 9a via a pin 11, and the upper end of the swing link 10 On the side, the work equipment is mounted so that it can be rotated in the front and rear directions by a swing cylinder 12 mounted on the member 9.

A front lower part of a swing bracket 13 is pivotally attached to the upper end of the swing link 10 by a pin 14, and a tilt cylinder 15 is provided diagonally between the bottom of the swing bracket 13 and the swing link 10. The tilt cylinder 15 allows the swing bracket 1 to swing around the pin 14.
It can be rotated 3 degrees.

Further, one end sides of parallel tanks 16 and 17 are pivotally attached to the rear upper and lower parts of the swing bracket 13 via pins 18 and 19.

The other end side of each parallel link 16 and 17 is a work equipment support member 2
0 through pins 18' and 19', a four-bar parallel link mechanism is constituted by this work implement support member 20, each parallel link 16, 17, and the swing bracket 13, and the swing bracket 13 and the work equipment support member 20, a lift cylinder 21 is provided so as to be positioned diagonally between each of the parallel links 16 and 17, and this lift cylinder 21 supports the work equipment with respect to the swing bracket 13. The member 20 can move up and down.

The upper part of the excavation mechanism 22 is attached to the front part of the work implement support member 20.

The excavation mechanism 22 has a pair of elongated frames 23 that are parallel to each other and whose upper ends are fixed to both sides of the work implement support member 20 .

A shaft rod 2 is provided between the upper and lower ends of these frames 23, respectively.
4 and 25 are suspended horizontally, and sprockets 26 and 27 are attached to both ends of these shaft rods 24 and 25, and an endless connection is made between the upper sprocket 26 and the lower sprocket 27. A chain 28 is wrapped along the inside of each frame 23.

The chain 28 has a structure in which a number of links 28a are connected by pins 28b, and a number of packets 29 are attached to the outside of the chain 28 at equal intervals.

Each packet 29 has a digging blade 29a at its tip, and there is no bottom below the digging blade 29a, and the earth and sand excavated by the digging blade 29a is distributed between the side plates 29b and both sides of these. Bottom plate 29 attached to the lower part of plate 29 b
The chain 28 is accommodated between the holes C and raked upward as the chain 28 rotates.

Further, a drive cylinder 30 is provided between each chain 28.

The base end of the drive cylinder 30 is supported by the upper shaft rod 24, and a hook 31 shown in FIG. It is being

The tip of the hook 31 protrudes forward (in the digging state), and when the drive cylinder 30 is extended, that is, when it is descending along the frame 23, it rotates in the direction of arrow a, and the link 28 of each chain 28 Pin 2 connecting a
8 b, and when it rises along the frame 23 as the drive cylinder 30 shortens,
The tip engages with the nearby pin 28b, and the chain 28
is rotated in the clockwise direction shown in FIG. 2, and thereby the packet 29 attached to the chain 28 is also rotated upward.

The hydraulic circuit (not shown) that supplies hydraulic pressure to the drive cylinder 30 is provided with solenoid valves that are controlled by limit switches (not shown) that operate at the stroke ends above and below the piston rod 30a. The expansion and contraction movement of the drive cylinder 30 is automatically performed by switching.

The chain 28 is also prevented from rotating in the opposite direction, that is, counterclockwise in FIG. 2, by a stopper mechanism (not shown).

On the other hand, due to the rotation of the chain 28, the digging blade 2 of the packet 29 is
After the earth and sand excavated in step 9a is stored in the packet 29 and transported upward, the work equipment is attached to a transport vehicle such as a dump truck parked in front of the self-propelled vehicle by means of a conveyor 33 attached diagonally to the member 9. As well as being loaded onto 34,
A reaction force support mechanism 35 is attached to the rear of the work implement support member 20 to support the excavation reaction force.

The reaction force support mechanism 35 includes a support arm 37 whose base end is pivotally connected to the lower part of the work equipment support member 20 by a pin 36, and a rotation cylinder 38 which rotates the distal end of the support arm 37 in the vertical direction. The wheel 3 is attached to the tip of the support arm 37.
9 is rotatably supported.

Therefore, when excavating a trench for laying electrical cables for water and sewage, etc., first position the work machine 3 on the planned line, and then use the lift cylinder 21 to move the work machine 20 to the second position.
The lower part of the excavation mechanism 22 is brought into contact with the ground surface by raising it to the position shown in Figure A, and the wheels 3 of the reaction force support mechanism 35 are
9 is positioned slightly behind the excavation mechanism 22 and is grounded.

In this state, the drive cylinder 30 is reciprocated and the chain 2
8 and a packet 29 attached thereto are rotated in one direction, and excavation is started from the ground surface by the packet 29. As the excavation is carried out, the work equipment support member 20 is sequentially lowered by the lift cylinder 21, and the rotary cylinder 38 causes the wheels 39 of the reaction force support mechanism 35 to shift backward from the ground surface.

When the lowermost end of the excavating mechanism 22 reaches the desired groove depth, the work implement support member 20 is moved to the second position by the lift cylinder 21.
Lift it up to the position shown in Figure A, and use the rotary cylinder 38 to move the wheels 39 of the reaction force support mechanism 35 to the state at the start of excavation (the excavation mechanism 2
(slightly behind 2).

Then, the excavating mechanism 22 is lowered together with the wheels 39 to the bottom of the previously dug trench.

Therefore, the work implement support member 20 is fixed, and in this state, the self-propelled vehicle 1 is moved forward while rotating the packet 29 to continuously dig into the trench.

The earth and sand excavated by each packet 29 is accommodated in the packet 29 and transported to the ground, and is further loaded onto a transport vehicle 34 via a conveyor 33, and the excavation mechanism 22
Since the excavation reaction force generated during trench excavation is supported by the wheels 39 of the excavation reaction force support mechanism 35, the self-propelled vehicle 1 may swing unstably or fall backwards due to the excavation reaction force. do not have.

On the other hand, when the prescribed trench excavation is completed, the rift 1 to cylinder 21
After the excavation mechanism 22 is raised to the position shown in FIG. 2A, the swing cylinder 12 pushes the upper end of the swing link 10 forward around the pin 11.

As a result, the work implement support member 20 and the excavation mechanism 22 are placed in the position shown in FIG. Since the self-propelled vehicle 1 touches the ground behind the vehicle body 1a, stable running similar to a four-wheeled vehicle is possible, and rapid movement to the next work site is also possible.

As detailed above, this idea uses a single driving wheel of the vehicle and a working machine for digging trenches is installed on the side of it, so the working machine does not protrude beyond the width of the vehicle, and this makes it possible for the general public to In addition to being able to drive safely on roads, the work equipment located on the side of the vehicle can dig around obstacles such as walls, making it particularly effective when excavating roads in urban areas.

In addition, since the excavation reaction force is received by the wheels that are grounded at the bottom of the excavated trench, the vehicle body does not swing unstable even if the excavation reaction force fluctuates greatly, making work more stable. Work efficiency is also improved because it can be done in the same state.

Furthermore, when the work equipment completes digging a trench and stores the work equipment on the side of the vehicle body, the wheels of the excavation reaction force support mechanism touch the ground behind the vehicle body, thereby stabilizing the running of the self-propelled vehicle. ,
Even if a self-propelled vehicle has only one drive wheel, it will be able to run at high speeds, allowing for quick movement between sites, and by having only one drive wheel, there will be no need for a differential device, etc. Therefore, the structure of the power system becomes simple and can be provided at low cost.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, with FIG. 1 being a plan view, FIG. 2 being a side view, and FIG. 3 being a detailed view of the packet drive section. 1 is a self-propelled vehicle, 1a is a vehicle body, 2 is a steering wheel, 3 is a work machine,
4 is a drive wheel, 35 is an excavation reaction force support mechanism, 37 is a support arm, and 39 is a wheel.

Claims (1)

[Scope of utility model registration request] At the rear of the vehicle body 1a of the self-propelled vehicle 1, the vehicle body 1a has two steering wheels 2 at the front and one drive wheel 4 at the rear.
A working machine 3 that continuously excavates a groove is provided on the side of the drive wheel 4 and is movable up and down. Behind this working machine 3,
A support arm 37 is provided whose base end is pivotally attached to the rear of the work equipment support member 20 and whose distal end is movable up and down at the rear of the vehicle body 1a by means of a rotation cylinder 38.
A wheel 39 is rotatably attached to the tip of the wheel 7 to support the excavation reaction force at the bottom of the trench excavated during ditch digging, and also to stabilize the running of the vehicle by touching the ground behind the vehicle body 1a during free running. Running stabilization device for continuous trench excavation machines.