JP2004150149A - Extension conveyor of self-traveling civil engineering/ construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify installation work by easily supplying motive power to an extension conveyor when installing the extension conveyor in a self-traveling civil engineering/construction machine. <P>SOLUTION: Hydraulic lines 20 and 21 of a discharge conveyor are detachably formed by interposing hydraulic couplers 23a and 23b in the side vicinity of a first hydraulic motor 16. Hydraulic couplers 39a and 39b are installed on the end of hydraulic lines 37 and 38 of a second hydraulic motor 31 for driving the extension conveyor, and are formed so as to be connectable to the hydraulic couplers 23a and 23b of the discharge conveyor. When using the extension conveyor, both hydraulic lines are connected by the hydraulic couplers 23a, 39b and 39a, 23b, and the first hydraulic motor 16 and the second hydraulic motor 31 are connected in series, and pressure oil is supplied to both hydraulic motors 16 and 31 from the same hydraulic pump 18. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an extension conveyor of a self-propelled civil engineering / construction machine, and more particularly to an extension conveyor driven by a hydraulic motor.
[0002]
Problems to be solved by the prior art and the invention
2. Description of the Related Art Conventionally, self-propelled civil engineering / construction machines such as soil improvement machines and crushers are driven by a hydraulic pump by an engine, and a hydraulic motor is rotated by the hydraulic oil of the hydraulic pump to carry a carrier mounted on the soil improvement machine or the crusher. Moving conveyor and discharge conveyor. However, depending on the construction site, an extended conveyor such as a portable conveyor (for example, see Patent Literature 1) that can extend the transport portion or a crushing conveyor (for example, see Patent Literature 2) in the post-process of the discharge conveyor is transported. By extending the distance, it is possible to carry in earth and sand from places away from self-propelled civil engineering and construction machines, and to transport crushed and improved soil to places away.
[0003]
[Patent Document 1]
JP-A-2002-97663 (Page 10, paragraph 0081, FIG. 12)
[0004]
[Patent Document 2]
JP-A-2002-253980 (pages 7-9, FIG. 1)
However, the transfer conveyor and the discharge conveyor mounted on the body of the soil improvement machine are driven by the pressurized oil from the hydraulic pump being guided to the hydraulic motor for the transfer conveyor and the hydraulic motor for the discharge conveyor via the direction / flow control valve. Document 1, page 7, paragraph number 0050) is that the motor provided on the extension conveyor such as the portable conveyor or the crushing conveyor is driven by another power source, which complicates the piping and increases the cost. In addition, the installation work was complicated. Also, the conveying speed of the original conveyor and the extension conveyor may be different, and the workability is not good.
[0005]
Therefore, when installing an extension conveyor in a self-propelled civil engineering / construction machine, there is a technical problem to be solved in order to simplify the installation work by making it possible to easily supply power to the extension conveyor. The present invention aims to solve this problem.
[0006]
[Means for Solving the Problems]
The present invention has been proposed to achieve the above object, and is a self-propelled civil engineering / construction machine provided with a discharge conveyor driven by a first hydraulic motor. In the extension conveyor added to the discharge conveyor of the above, the extension conveyor is driven by a second hydraulic motor, and a hydraulic coupler is attached to a terminal of a hydraulic line that supplies and discharges hydraulic oil to and from the second hydraulic motor, On the other hand, the hydraulic line of the discharge conveyor is an extension conveyor of a self-propelled civil engineering / construction machine which is detachably formed by a hydraulic coupler interposed near the first hydraulic motor,
Further, the first hydraulic motor and the second hydraulic motor are set to substantially the same oil discharge amount, and when extending the transport distance of the discharge conveyor, the hydraulic pressure interposed in the vicinity of the first hydraulic motor is set. The present invention provides an extension conveyor for a self-propelled civil engineering / construction machine which is used by disconnecting a coupler and connecting to a hydraulic line of the extension conveyor and connecting a first hydraulic motor and a second hydraulic motor in series. It is.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a self-propelled crusher (hereinafter simply referred to as a crusher) 10 as an example of a self-propelled civil engineering / construction machine. A frame 12 is mounted on an upper part of a lower traveling body 11, and substantially at the center of the frame 12. A crushing device 13 is provided in the section. The crushing device 13 inputs materials such as quarries from a hopper 14 provided at an upper portion, and the material finely crushed by the crushing device 13 is taken out of the crusher 10 by a discharge conveyor 15 provided at a lower portion of the crushing device 13. It is configured to discharge. The discharge conveyor 15 is driven by a first hydraulic motor 16.
[0008]
FIG. 2A is a hydraulic circuit diagram of the first hydraulic motor 16, and a hydraulic pump 18 is rotated by an engine 17 mounted on the crusher 10. The pressure oil discharged from the hydraulic pump 18 is supplied to a hydraulic line 20 or 21 of the first hydraulic motor 16 via a direction control valve 19.
[0009]
The direction control valve 19 is a 4-port, 3-position electromagnetic switching valve. In the illustrated neutral position, the P port from the hydraulic pump 18 communicates with the T port to the tank, and the A port of the hydraulic line 20 communicates with the A port. The B port of the hydraulic line 21 is closed. Therefore, when the direction control valve 19 is in the neutral position, the oil discharged from the hydraulic pump 18 is returned to the tank 21, and the first hydraulic motor 16 does not rotate.
[0010]
Here, the hydraulic line 20 or 21 is provided with a hydraulic coupler near the first hydraulic motor 16. In the present embodiment, a hydraulic coupler 23 is interposed in the middle of the hydraulic line 21 near the first hydraulic motor 16. At the time of normal use, one hydraulic coupler (male side) 23a and the other hydraulic coupler (female side) 23b are connected and directly connected as shown, and one port of the first hydraulic motor 16 is connected. Is connected to a direction control valve 19 via a hydraulic line 20, and the other port of the first hydraulic motor 16 is connected to the direction control valve 19 via a hydraulic line 21 directly connected via a hydraulic coupler 23.
[0011]
Now, if one solenoid 24 of the directional control valve 19 is excited by a signal from a controller or an operation switch (neither is shown) based on the operation of the operator, the directional control valve 19 is moved from the neutral position (A 2), the pressure oil discharged from the hydraulic pump 18 is supplied to the hydraulic line 20, and the first hydraulic motor 16 is driven forward. On the other hand, if the other solenoid 25 of the direction control valve 19 is excited, the direction control valve 19 switches from the neutral position to the (b) position, and the hydraulic oil from the hydraulic pump 18 is supplied to the hydraulic line 21. Then, the first hydraulic motor 16 is driven to rotate in the reverse direction.
[0012]
Next, a case where the transport distance of the discharge conveyor 15 is extended will be described. As shown in FIG. 1, an extension conveyor 30 is installed on the discharge side of the discharge conveyor 15. The extension conveyor 30 is driven by a second hydraulic motor 31. Wheels 32 and 33 are attached to the lower surface of the extension conveyor 30 so as to be movable. One of the wheels 32 is supported by a telescopic arm 34 and a fixed-length stay 35, and the inclination of the extension conveyor 30 can be arbitrarily changed by extending and contracting the arm 34 to change the length. 36 is a receiving hopper.
[0013]
The second hydraulic motor 31 installed on the extension conveyor 30 is set to substantially the same oil discharge amount as that of the first hydraulic motor 16, and as shown in FIG. A hydraulic coupler (male side) 39a is mounted on one end, and a hydraulic coupler (female side) 39b is mounted on the other end of the other hydraulic line 38. By using the hydraulic couplers 39a and 39b, as described later, pressure oil can be supplied from a hydraulic circuit of the discharge conveyor 15 provided in the crusher 10.
[0014]
FIG. 3 is a hydraulic circuit diagram when the extension conveyor 30 is installed, and the same components as those of the hydraulic circuit of the first hydraulic motor 16 shown in FIG. I do. When the extension conveyor 30 is installed, the hydraulic coupler 23 of the hydraulic line 21 is once disconnected, and a hydraulic coupler (male side) 39a provided at one end of the hydraulic line 37 is connected to one hydraulic coupler (female side) 23b. Then, a hydraulic coupler (female side) 39b provided at the other end of the hydraulic line 38 is connected to the other hydraulic coupler (male side) 23a. Therefore, the first hydraulic motor 16 and the second hydraulic motor 31 are connected in series via the hydraulic couplers 23a, 39b and 23b, 39a.
[0015]
Thus, if one solenoid 24 of the directional control valve 19 is excited by a signal from a controller or an operation switch (neither is shown) based on the operation of the operator, the directional control valve 19 moves from the neutral position to ( B) The position is switched to the position, the pressure oil discharged from the hydraulic pump 18 is supplied to the hydraulic line 20, and the first hydraulic motor 16 is driven forward. The pressure oil that has passed through the first hydraulic motor 16 flows into the hydraulic line 37 via the connection of the hydraulic couplers 23a and 39b, and the second hydraulic motor 31 is driven to rotate forward. The pressure oil that has passed through the second hydraulic motor 31 flows into the hydraulic line 21 via the connection of the hydraulic couplers 39a and 23b, passes through the direction control valve 19, and returns to the tank 22.
[0016]
On the other hand, when the other solenoid 25 of the directional control valve 19 is excited, the directional control valve 19 switches from the neutral position to the (b) position, and the hydraulic oil discharged from the hydraulic pump 18 is supplied to the hydraulic line 21. And flows into the hydraulic line 37 through the connection between the hydraulic couplers 23b and 39a, and the second hydraulic motor 31 is driven to rotate in the reverse direction. The pressure oil that has passed through the second hydraulic motor 31 is supplied to the first hydraulic motor 16 via the connection of the hydraulic couplers 39b and 23a, and the first hydraulic motor 16 is driven to rotate in the reverse direction. The pressure oil that has passed through the first hydraulic motor 16 flows into the hydraulic line 20, passes through the direction control valve 19, and returns to the tank 22.
[0017]
As described above, when the extension conveyor 30 is used, the first hydraulic motor 16 and the second hydraulic motor 31 are connected in series via the hydraulic couplers 23a and 39b and 23b and 39a. The pressure oil discharged from the hydraulic pump 18 which is a hydraulic source of the discharge conveyor 15 mounted on the extension conveyor 30 can be used, and the extension conveyor 30 does not require another power source. Therefore, the piping is simplified, the work of installing the extension conveyor 30 is simplified, and the cost can be reduced.
[0018]
The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.
[0019]
【The invention's effect】
As described in detail in the above embodiment, the invention according to claim 1 is configured such that the hydraulic line is detachable by interposing a hydraulic coupler near the first hydraulic motor that drives the discharge conveyor. At the same time, a hydraulic coupler is mounted at a terminal of a hydraulic line of a second hydraulic motor that drives the extension conveyor. Therefore, by disconnecting the hydraulic coupler on the discharge conveyor side and connecting each hydraulic coupler on the extension conveyor side, the hydraulic power source of the discharge conveyor can easily supply power to the extension conveyor. Since the connection and disconnection of the hydraulic coupler are extremely simple, the work of installing the extension conveyor is simplified, which can contribute to cost reduction.
[0020]
According to a second aspect of the present invention, the first hydraulic motor and the second hydraulic motor are set to have substantially the same oil discharge amount, and the first hydraulic motor and the second hydraulic motor are connected in series via a hydraulic coupler. , The rotations of the discharge conveyor and the extension conveyor can be synchronized, and in addition to the effect of the invention described in claim 1, the conveyor speeds of both conveyors match, thereby improving workability. In addition, since the first hydraulic motor and the second hydraulic motor are connected in series, energy is distributed according to the required power of each of the discharge conveyor side and the extension conveyor side, thereby improving specification efficiency without waste. It is an invention that has various effects, such as the effect of the invention.
[Brief description of the drawings]
The figure shows an embodiment of the present invention.
FIG. 1 shows an embodiment of the present invention, and is a side view of a self-propelled crusher, a discharge conveyor, and an extension conveyor.
FIG. 2A is a hydraulic circuit diagram of a first hydraulic motor.
(B) A hydraulic circuit diagram of a second hydraulic motor.
FIG. 3 is a hydraulic circuit diagram when an extension conveyor is installed.
[Explanation of symbols]
10 Self-propelled crusher 15 Discharge conveyor 16 First hydraulic motor 18 Hydraulic pumps 20, 21 Hydraulic lines 23, 23a, 23b Hydraulic coupler 30 Extension conveyor 31 Second hydraulic motor 37 Hydraulic lines 39, 39a, 39b Hydraulic coupler

Claims (2)

A self-propelled civil engineering / construction machine having a discharge conveyor driven by a first hydraulic motor, wherein the extension conveyor is an extension conveyor added to the discharge conveyor of the self-propelled civil engineering / construction machine. A hydraulic coupler is mounted at the end of a hydraulic line that is driven by a second hydraulic motor and supplies and discharges pressure oil to and from the second hydraulic motor, while the hydraulic line of the discharge conveyor is close to the first hydraulic motor. An extension conveyor for self-propelled civil engineering and construction machinery, which is detachably formed by an interposed hydraulic coupler. The first hydraulic motor and the second hydraulic motor are set to substantially the same oil discharge amount, and when extending the transport distance of the discharge conveyor, a hydraulic coupler interposed in the vicinity of the first hydraulic motor is used. The extension conveyor of a self-propelled civil engineering / construction machine according to claim 1, wherein the extension conveyor is detached and connected to a hydraulic line of the extension conveyor, and the first hydraulic motor and the second hydraulic motor are used in series.

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