JPH07100932B2 - Traveling equipment for soft ground processor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a soft ground treating machine provided with a self-propelled crawler having a float for stabilizing the soft ground such as landfills and mud swamps, and in particular, the crawler 4 The present invention relates to a traveling device for an extremely soft ground processing machine, which is equipped with at least one piece.

[Conventional technology and its problems]

In recent years, a machine equipped with a self-propelled crawler having a float has come to be used as a machine for stabilizing treatment of soft ground such as landfills and mud and wetlands. In the original self-propelled soft ground processing machine, there were two crawlers with floats which were connected and fixed at appropriate intervals and the stirring shaft was allowed to move laterally. When the ground is extremely soft ground, the load per unit area of each crawler becomes large with one float type crawler on each of the left and right sides, and the sinking of the crawler increases, making it impossible to run. In addition, recently, for the purpose of improving the processing capacity from the economic effect, a larger size is adopted, the weight of the entire processing machine is increased, and the load per unit area is further increased. Large machines with two or more crawlers each on the left and right and two agitation shafts have come into wide use.

That is, in the figure, C ₁ , C ₂ , C ₃ , C ₄ are self-propelled crawlers having a float, with a wide interval in the center, and crawlers C ₁ , C ₂ , C with appropriate intervals on both sides. Arrange ₃ and C ₄ in parallel,
It is fixed by a connecting rod.

1 is a turret, 2 is an agitating shaft up-and-down moving table attached to the upper part of the turret 1 so as to be movable up and down
The vertical movement drive device 3 moves up and down along the slide portion 1a of the turret 1.

A is a stirring shaft having a stirring member B attached to its lower end, two upper portions of which are supported in relation to the stirring shaft vertical moving table 2, and a lower portion of which is supported by a lower portion of the turret 1 via a supporting member 1b. Reference numeral 3 denotes a stirring shaft vertical movement drive device for driving the stirring shaft vertical movement base 2, and by driving this, the stirring shaft A is moved up and down through the movement base 2.

Reference numeral 4 denotes a traverse rail device portion, 5 denotes a turret mounting member integrally attached to a traverse slide device 6 arranged on the traverse rail device portion 4, and the turret 1 is attached to the mounting member 5 so as to be vertically slidable. Reference numeral 7 is a hydraulic cylinder for vertically moving a turret, one end of which is attached to the turret 1 and the other end of which is attached to the turret mounting member 5, and the turret 1 is vertically moved by the cylinder 7. 8 is a driver's cab.

Reference numeral 9 denotes a hydraulic cylinder for front-rear direction control, which is mounted on the transverse slide device 6 and the turret mounting member 5 and is operated to control the front-rear direction position of the turret 1 via the turret mounting member 5. 10 is attached to the front and rear sides of the transverse slide device 6 and operated to operate the transverse slide device 6
And a horizontal direction control hydraulic cylinder configured to control the horizontal position of the turret 1 via the turret mounting member 5.

The operation of the soft ground processing machine will be described below.

That is, when the turret 1 is located near the left end of FIG. 1, the center of gravity of the machine moves to the left of the center as compared with the case where the turret 1 is located at the center of the soft ground processing machine. Therefore, each float crawler C ₁ , load acting on the C _2, C _3, C ₄ is greatest in the crawler C _1, the smallest possible crawlers C ₄ is evident, each float crawler C _1, C _2, C _3, C ₄ The ground contact surface is inclined with respect to the horizontal plane of the improved ground, and the inclination rate becomes larger as the improved ground is softer.

In this way, if the turret 1 remains tilted, the deeper the improved depth, the larger the untreated portion at the tip will remain,
Since reliable soft ground will not be improved, the front-rear direction control hydraulic cylinder 9 controls the front-rear direction position of the turret 1, while the four left-right direction control hydraulic cylinders 10 are used.
As a result, the traverse slide device 6 can be used with respect to the traverse rail device 4.
It is designed to correct the relative position of.

By doing so, when the turret 1 is displaced, the turret 1 can be made vertical by operating the control cylinders 9 and 10 described above, and the soft ground can be treated without leaving any untreated portion. Can be done.

Thus, when the two left and right crawlers are run by using separate oil motor outputs, it is necessary to synchronize the left and right crawlers so that they run at exactly the same speed. Now, taking the two left-side crawlers as an example, if the traveling speeds of the crawlers are different, it means, for example, two gears of the same diameter with different rotational speeds and a width across both gears. The same as engaging one gear, the gears either stop with no rotation at all, or each of the flora acts as a braking force, just as either gear breaks, and the crawler track Wear becomes extremely fast. The same goes for the right-hand running device. Therefore, conventionally, a structure has been adopted in which the two crawlers on the left side are connected by a single shaft as a whole, and two oil motors are used for driving. Of course, the right side traveling device is also the same.

However, even when the above-mentioned method is adopted, the following drawbacks occur.

First, it suffices if the ground to be improved has the same height, that is, on the same plane, but this is impossible. If the height of the ground is not on the same plane, the traveling speeds of both crawlers are If they are different, extremely large displacement force is applied to the shaft connecting them, and in extreme cases, the shaft is broken. Even if the shafts are connected by a universal joint so as not to be damaged, if the shafts are not on the same line, the angular velocities of both shafts naturally change. This means that the traveling speeds of the crawlers change from each other, and as described above, the rate of wear and damage of the crawler track is extremely high.

[Means for Solving the Problems]

The present invention has been made for the purpose of providing a traveling device for a soft ground processing machine that can solve the problems of the above-described conventional techniques and can always maintain appropriate traveling, and the configuration thereof is on the left and right sides respectively. Soft ground treatment in which two or more equal number of float type crawler running parts are continuously connected and fixed in parallel at appropriate intervals, and the crawler running parts on both sides are individually driven by driving oil motors having the same performance. In the machine, a connecting oil motor and a check valve for synchronous control are respectively provided between the pressure oil supply unit and each of the drive oil motors so that the drive oil motors can be driven in synchronization. It is characterized by that.

[Action]

The pressure oil is supplied to the drive oil motor that drives the crawler traveling section via the synchronous control linked oil motor, and the drive oil motor is driven synchronously, so that the crawler traveling section on the same side always operates at the same speed. Since the vehicle runs in the same way, the drawbacks due to the difference in the traveling speed of the crawlers on the same side are eliminated, and stable ground treatment can be performed.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a front view of a soft ground processing machine having four crawler type traveling devices, FIG. 2 is a side view of the same, FIG. 3 and FIG.
The figure is a hydraulic system diagram for the traveling apparatus of the present invention.

In FIGS. 3 and 4, the left traveling crawler for C ₁ and C ₂ is L, and the right traveling crawler for C ₃ and C ₄ is R.

Reference numeral 11 in the figure is a direction switching valve for switching the direction of pressure oil to reverse the rotation direction of the oil motor, which will be described later, to switch the traveling direction (forward or reverse) of the crawler, 12, 13, 14, 15
Are all linked oil motors for synchronous control having the same performance and particularly the same volume ratio per rotation.
3, 14, and 15 respectively have the rotation axis x fixed as shown. 17, 18 are check valves, 19 and 20 are drive oil motors having the same performance. Fig. 3 shows a state in which the speed switching valve 16 is switched to a high speed position, and Fig. 4 shows the same low speed. Shows the state of being switched to the position.

Thus, in the state of FIG. 3, when the L-side pressure oil directional switching valve 11 is moved to the right to switch, the pressure oil supplied from the pressure oil supply portion P ₁ is directional switching valve 11 Are supplied to the synchronous control coupled oil motors 12 and 13 to rotate the oil motors 12 and 13, and the pressure oil that has passed through the oil motor 12 and the pressure oil that has passed through the speed switching valve 16 merge. Then, through the check valve 17, rotate the drive oil motor 19,
Further, after passing through the passages of the check valve 18 and the speed switching valve 16 and rotating the drive oil motor 20, the flow is divided through the check valve 18.
A part of them passes through the speed switching valve 16 and the oil motor 14, and the rest passes through the oil motor 15, then merges, passes from the direction switching valve 11 through the pressure oil discharge part T _1, and is discharged to the tank side circuit. Here, as described above, since the drive oil motors 19 and 20 have the same performance, both motors 19 and 20 always rotate at the same rotation speed. That is, the driving oil motors 19 and 20 are connected in series and operated by one system of pressure oil.

If the above is the forward drive of the crawler, the direction switching valve 11
, The crawler is driven in reverse.

Although the above description has been made on the L side, the same applies to the R side. Therefore, if the pressure oil is the same for both the L side and the R side, the L side crawler is used.
Since C ₁ , C ₂ and R side crawlers C ₃ , C ₄ have the same traveling speed, there are no defects such as wear and damage to the tracks of each crawler, and at the same time, the crawler is always fixed even when traveling on rough terrain. Unnecessary stress concentration on the part can be eliminated.

Incidentally, the synchronous control coupled oil motors 12, 13, 1 in the above
No. 4 and 15 are not necessary because they are used as equal-pressure dividers for pressure oil, but they are necessary to make the speed variable.

FIG. 3 shows an example in which the driving oil motors 19 and 20 are rotated at a high speed, while FIG. 4 shows an example in which the speed switching valve 16 is switched to a low speed. The operation will be described below.

In FIG. 4, when the speed switching valve 16 is switched to the low speed side and the direction switching valve 11 is moved to the right in the figure, the pressure oil supplied from the pressure oil supply portion P ₁ passes through the direction switching valve 11. Supplied to the synchronous control coupled oil motors 12, 13 to rotate those oil motors 12, 13, the pressure oil passing through the oil motor 12 passes through the check valve 17, and the drive oil motor 19 is rotated.
The pressure oil passing through the check valve 17 and the oil motor 14 and also passing through the oil motor 13 passes through the check valve 18, and the drive oil motor 20 is rotated to pass through the check valve 18 and the oil motor 15. They merge and are discharged from the direction switching valve 11 through the pressure oil discharge part T ₁ to the tank side circuit. Here, since the synchronous control coupled oil motor and the drive oil motor have the same performance as described above, the drive oil motors 19 and 20 always rotate at the same rotation speed. This operation is the same for both the L and R sides.

Therefore, even in the low speed driving, it is possible to eliminate the drawbacks of the prior art, as in the case of the high speed driving.

In addition, the drive oil motors 19 and 20 have check valves 1
Since 7,18 are installed, the situation in which the supply of pressure oil from the pressure oil supply parts P ₁ and P ₂ is stopped, for example, when the soft ground processor rises and runs on a slope, for example, for pressure oil supply Even if the pipe is damaged or comes off, the check valves 17,18 close the hydraulic circuits before and after the drive oil motors 19,20, so that idling of the motors 19,20 is prevented. The processor does not rise and fall down the slope.

The traveling speed of the crawler can be freely changed by controlling the supply of the pressure oil to the pressure oil supply units P ₁ and P ₂ shown in FIGS. 3 and 4.

〔The invention's effect〕

The present invention is as described above, and in the traveling device of the soft ground processing machine, in order to reduce the ground load per unit area, in the processing machine having two or more crawler traveling devices on one side, By always controlling the traveling speeds of the two or more crawlers to be the same, it is possible to prevent wear and damage of the crawler tracks of the one crawler due to the difference in the traveling speeds of the one crawler. Even when traveling on level ground, there is an effect that it is possible to always eliminate unreasonable concentration of stress on the crawler fixing portion. Also, since each drive oil motor has a check valve attached to it, even if the pressure oil supply pipe were to break or come off in the middle of the ascending slope,
The drive oil motor is prevented from idling, the soft ground processing machine does not go up and down the slope, and the traveling speed can be easily doubled or halved by the speed switching valve. Its workability is also extremely good.

Therefore, the present invention is suitable as a traveling device for a soft ground processing machine, particularly an extremely soft ground processing machine.

[Brief description of drawings]

FIG. 1 is a front view of an example of a soft ground processing machine, FIG. 2 is a side view of the same, and FIGS. 3 and 4 are hydraulic system diagrams showing the case where the speed switching valve is switched between high speed and low speed, respectively. C ₁ , C ₂ , C ₃ , C ₄ …… Crawler, 11 …… Directional switching valve, 12, 13, 1
4,15 …… Synchronous control oil motor, 16 …… Speed switching valve,
17,18 Check valve, 19,20 Crawler drive oil motor, x Rotating shaft of synchronous control oil motor, P ₁ , P ₂
… Pressure oil supply part, T ₁ , T ₂ …… Pressure oil discharge part

Claims (2)

[Claims] 1. An equal number of floating type crawler running parts, two or more on each of the left and right sides of the crawler running parts, are fixed in parallel at a suitable interval, and the crawler running parts on both sides individually have the same performance. In the soft ground processing machine that is driven by the drive oil motor, a connecting oil motor and a check valve for synchronous control are provided between the pressure oil supply unit and the drive oil motors, respectively. A traveling device for a soft ground processing machine, characterized in that the driving is performed in synchronization with each other. 2. A soft ground treatment machine according to claim 1, wherein a hydraulic switching valve for switching the traveling speed between two stages, high and low, is interposed between the synchronous control coupled oil motor and each drive oil motor. Traveling device.