JP2753209B2 - Lubricating method for exciter and lubricating device for exciter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of lubricating, cooling and rust-proofing by lubricating oil being pumped and circulated to a vibrator used for pile driving work and the like, and The invention relates to the lubricating device, and is applied to a hydraulic rotary exciter.

[0002]

2. Description of the Related Art In a hydraulic rotary exciter, an eccentric weight is rotated by an oil motor. FIG. 5 is a diagram in which a prime mover is added to a hydraulic system diagram of a conventional example of a hydraulic rotary exciter. Reference numeral 1 denotes a vibration exciter, in which a sub-chamber 1b functioning as an oil pan is provided below a box-shaped main chamber 1a, and a plurality of rotary shafts (only one is shown) in the main chamber 1a. ) 1c, and the plurality of rotating shafts are rotated by the synchronous gear 1d. An eccentric weight 1e is attached to each of the plurality of rotating shafts 1c, and the rotation of the eccentric weight generates a vibrating force. The reference numeral 2 denotes an engine as a prime mover. An oil motor 3 for excitation is connected to a rotary shaft 1c of the exciter, and is supplied with pressure oil from a main oil pump 4 to be rotated. The main oil pump 4 is connected to the crankshaft 2a of the engine 2 directly or via a gear mechanism, converts the output energy of the engine 2 into the pressure of the working oil × the flow energy and converts the output energy into the pressure of the hydraulic oil. It is supplied to the vibration oil motor 3.

As a system separate from the hydraulic power system described above, a lubricating oil circulation system described below is provided.
Forced circulation lubrication is performed. That is, the lubricating oil pump 5 is connected to the camshaft 2b rotated by the crankshaft 2a of the engine 2 via the timing gear 2c, and the lubricating oil pump 5 is connected to the lubricating oil pump 5 stored in the sub chamber 1b. The oil is sucked and pumped and supplied to the main chamber 1a of the vibrator through the orifice 6. The lubricating oil forcedly circulated as described above reduces the friction of the components inside the vibration exciter 1, cools, and prevents rust, thereby performing a lubricating function.

[0004]

Generally, a vibration pile driving operation and a vibration pile driving operation using a vibration exciter are carried out by mounting a vibration exciter on an upper end of a pile in a vertical position and using a crane or the like to mount the vibration exciter. Hanging is performed. When the conventional exciter shown in FIG. 5 is used under these working conditions, the exciter 1
A dedicated power unit P · A, which is equipped with a main oil pump 4 and a lubricating oil pump 5 on a dedicated engine 2 attached to
When the U is configured, it is convenient for performing the work, but the manufacturing cost, transportation and management costs of the power unit PU are high. For this reason, it is very economical if an engine with an oil pump for a hydraulic working machine of an appropriate construction machine (eg, excavator, crane car, etc.) can be diverted. However, the types and performance specifications of the construction machines that can be diverted are set by the entire construction plan, so that it is not always possible to use construction machines that are optimal for pile driving.

[0005] For example, a self-propelled hydraulic excavator called a backhoe is generally a one-engine, one-pump type, and when compared with FIG. 5, it corresponds to a main oil pump 4 driven by a crankshaft 2 a of an engine 2. Although the hydraulic device is mounted, it does not include a hydraulic device corresponding to the lubricating oil pump 5 driven independently of the main oil pump 4. Therefore, there is a need to develop a technique for rotating the vibration exciter using pressure oil discharged from one pump and lubricating (friction, cooling, and rust prevention) the components of the vibration exciter. Requested.

As the latest technology that meets the above demand, there is known a vibratory pile driving device described in Japanese Utility Model Publication No. 7-6188. This invention was created to provide lubrication even when the exciter is operated without load without generating vibration, and the rotation and lubrication of the exciter are controlled by one main pump. Although it is not created for the purpose of accomplishing it, the technical idea of performing both rotation drive and lubrication by one pump is disclosed in the drawings, although there are problems to be described later. FIG. 6 is a hydraulic system diagram disclosed as FIG. 3 in Japanese Unexamined Patent Publication No. Hei 7-6188, “vibration pile driving device”.

(See FIG. 6.) The entire amount of the pressure oil discharged from the hydraulic pump 31 and passing through the direction switching valve 33 and the flow regulating valve 34 passes through the hydraulic motor 27 and is driven to rotate. A part of the circulated oil is supplied as lubricating oil to the main chamber 15 of the exciter, and the remaining pressure oil supplied to the main chamber 15 as lubricating oil is used to rotate the eccentric weight 21 of the exciter. It is supplied to the motor 24 to cool it. Looking at FIG. 6 only, the hydraulic motor 2
Although it appears that the hydraulic motor 24 for vibration excitation is being rotated by the oil circulating through 7, it is just cooling.

According to the known technique shown in FIG. 6, the hydraulic motor 27 rotates with the rotation of the hydraulic motor 24 regardless of whether the vibration exciter is loaded or unloaded, and The return pump 26 is operated and the hydraulic motor 27
This has an excellent practical effect that part of the oil circulated through the oil is circulated as lubricating oil. However, a technique of cooling the vibrating hydraulic motor 24 by oil passing through the hydraulic motor 27 has been disclosed, but high-pressure hydraulic oil for rotating the hydraulic motor 24 is shown in FIG. Must be supplied from a separate hydraulic circuit that is not provided.

Now, suppose that the oil shown in FIG. 6 is applied to the hydraulic motor 24 as a power source of the hydraulic motor 24 for vibration generation by applying the technique shown in FIG. For the following reasons, the pressure balance and the flow rate balance of the two hydraulic motors 27, 27 are not established. That is, the hydraulic motor 24 needs to have a large capacity (high pressure and large flow rate) in order to generate vibration energy for pile driving, and the hydraulic motor 27 has a small capacity because it is for circulating and flowing the lubricating oil. (Low pressure and small flow rate) is sufficient.

Therefore, it is impossible to operate the hydraulic drive system of the vibration exciter and the lubricating oil circulation system by the discharge oil from the hydraulic pump unless some special measures are taken for the configuration of the hydraulic circuit and its control method. Can not. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has a structure in which the one main oil motor for vibration is driven to rotate with high efficiency by pressure oil discharged from one main oil pump, and the one main oil motor is driven. Pressure oil discharged from the oil pump minimizes energy loss and lubricates the exciter, and automatically adjusts to oil pressure fluctuations caused by load fluctuations of the exciter for energy loss It is an object of the present invention to provide a lubricating method capable of preventing the occurrence of a lubrication, and an apparatus therefor.

[0011]

The lubrication method of the present invention created to achieve the above object will be briefly described with reference to FIG. 1 corresponding to one embodiment of the present invention. In a method of lubricating a hydraulic rotary type exciter for rotating an eccentric weight (1e) provided by a main oil motor (3) for vibration, a hydraulic oil for rotating the main oil motor; The lubricating oil circulated to the machine is shared with each other,
A main oil pump (4) that discharges high-pressure oil, which is a power source of the vibration exciter, diverts a discharge oil, and supplies one of the divided hydraulic oils to the main vibration motor (3), The other hydraulic oil is supplied to a sub oil motor (8) having a smaller capacity than the main oil motor (3) through a flow dividing orifice (7) for flow control. The circulated oil is supplied into the main chamber (1a) to perform the anti-friction and cooling actions of the vibration exciter,
The auxiliary oil motor (8) rotationally drives a lubricating oil pump (5) having a smaller capacity than the main oil pump (4), and the oil supplied to the main chamber (1a) and accumulated below the main chamber (1a). Is sucked by the lubricating oil pump (5) and refluxed. An apparatus of the present invention configured to carry out the above-described method of the present invention is a device for lubricating a hydraulic rotary exciter, which sucks and pumps hydraulic oil which is also used as lubricating oil for the exciter (1). Main oil pump (4)
A main oil motor (3) for vibration excitation and a sub oil motor (8) for driving a lubricating oil pump, which are connected in parallel with each other in a discharge side pipe of the main oil pump; A diversion orifice (7) for controlling the flow of the oil motor (8), a pipeline for guiding the oil flowing through the sub oil motor to the main chamber (1a) of the vibrator, and a rotary drive by the sub oil motor A lubricating oil pump (5) for sucking and recirculating oil collected below a main chamber of the exciter.
And characterized in that:

[0012]

According to the above-mentioned means, most of the flow rate of the pressure oil discharged from the main oil pump is supplied to the main oil motor for vibration and rotates it. Then, after a part of the pressure oil discharged from the main oil pump rotates the auxiliary oil motor for driving the lubricating oil pump, it is guided to the main chamber of the vibration exciter to perform an action as lubricating oil, and The oil accumulated under the main chamber after performing the lubricating action is sucked by the lubricating oil pump and circulated. In this way, the hydraulic oil of the vibration exciter is also used as the lubricating oil, and the pressure oil discharged from one main oil pump is diverted to rationally excite the vibration while minimizing energy loss. In addition to being able to perform rotational driving and lubrication of the machine, when the load of the shaker fluctuates, the pressure balance and flow distribution between the main oil motor and the sub oil motor for the shake are automatically controlled. You.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, referring to FIGS.
An embodiment of the present invention will be described. FIG. 1 is a hydraulic system diagram showing one embodiment of a lubrication device configured to carry out a method of lubricating a vibration exciter according to the present invention. In the drawing, reference numeral 1 denotes a vibration exciter, in which an oil pan-shaped sub-chamber 1b is disposed below a box-shaped main chamber 1a, and a sub-chamber 2 is disposed in the main chamber 1a.
Four or four (only one is shown) rotary shafts 1c are arranged, and are synchronously rotated by a synchronous gear 1d. An eccentric weight 1e is attached to the rotating shaft 1c, and the amount of eccentricity can be increased or decreased. Therefore, when the amount of eccentricity is set to zero, the exciting force becomes zero, and the exciting force can be adjusted. An oil motor 3 for vibration generation is mounted on the rotating shaft 1c. This vibration oil motor 3
When it is necessary to clarify the distinction from the sub oil motor 8 which will be described later with reference to FIG. 1, this will be referred to as the main oil motor 3 for vibration generation.

On the other hand, one main oil pump 4 is driven to rotate by the crankshaft 2a of the engine 2. This main oil pump is a name for clarifying the distinction from the lubricating oil pump 5 described later with reference to FIG. The pressure oil discharged from the main oil pump 4 is diverted at a branch point B shown in the drawing, and most of the flow is supplied to the main oil motor 3 for vibration generation to rotate it. The oil diverted from the branch point B is supplied to the sub oil motor 8 while restricting the flow rate and reducing the pressure by the diverting orifice 7. The oil that has caused the rotation of the sub oil motor 8 is guided to the main chamber 1a of the vibrator, and after lubricating the members in the main chamber, accumulates in the sub chamber 1b provided below the main chamber 1a. A lubricating oil pump 5 is connected to the sub oil motor 8, and the lubricating oil pump 5 sucks oil in the sub chamber 1b and circulates the oil by returning it to an oil tank.

The configuration and lubrication method described above with reference to FIG. 1 are essential in the present invention, whereby the pressure balance and flow rate balance between the main oil motor 3 and the sub oil motor 8 for vibration generation are adjusted. It has the effect of being able to be operated by one main oil pump 4 while maintaining it, and has remarkable novelty and inventive step as compared with the technique of FIG. 6 which is a known invention. However,
In the configuration of FIG. 1, it is possible to cope with the case where the load on the vibration exciter 1 decreases and the pressure on the inflow side of the vibration main oil motor 3 decreases, and the discharge flow rate of the main oil pump 4 increases accordingly. Not enough. FIG. 2 is a chart depicting the pressure-flow characteristics of the main oil pump in the embodiment of FIG. 1 described above. The pump characteristics generally show a tendency for the discharge flow rate to decrease as the discharge pressure increases, and change steplessly between the rated load and the non-load state. Let's consider when the load is applied. At the time of load, the pressure is 200 kg / c as can be read from FIG.
m ² , the flow rate is 100 l / min. And
At no load, the pressure is 100 kg / cm ² and the flow rate is 160 liter / min. The exciter and its accessories are designed, manufactured and adjusted based on the rated load.
When the load state changes from the load state to the no-load state, the flow rate increases by 60 liter / min. This extra 60 liters /
If the pressure oil of min does not escape satisfactorily, not only will energy loss occur, but also the lost energy will become heat, resulting in overheating. Therefore, the excess pressure oil must be released with minimum energy loss. FIG. 3 is a hydraulic system diagram showing a lubricating device according to an embodiment obtained by improving the embodiment shown in FIG. 1 described above. The pressure oil discharged from the main oil pump 4 is
It is supplied to load equipment (sub oil motor / main oil motor) via the operation valve 9 and further via the three-way flow control valve 10. FIG. 4 is a piping diagram showing a detailed configuration of the three-way flow valve in the lubricating apparatus of the embodiment shown in FIG. 3 described above. A variable orifice 10b is inserted and connected in the middle of the main line 10a for guiding the supplied pressure oil to the load device. Then, the inflow pipe of the variable orifice 10b and the oil tank T
The pressure relief valve 10d is inserted and connected to the upstream relief pipe line 10c connecting between the pressure relief valve 10d and the pressure relief valve 10d. A downstream branch line 10e branched from the outflow side of the variable orifice 10b and communicated with the oil tank T is provided with a fixed-type branch orifice 10f and a differential pressure regulating valve 10g in order from the upstream side. It is inserted and connected. The differential pressure regulating valve 10g has a pilot line connected to the pressure regulating valve 10d, and opens in response to a pressure drop caused by the variable orifice 10b and the branch orifice 10f so as to maintain the pressure drop at a constant value. Operate.

(See FIG. 3) The three-way flow control valve 10 as described above is interposed between the main oil pump 2 and the main oil motor 3 for vibration generation, and an extra valve is provided so as to keep the differential pressure constant. Since the oil is released to the oil tank, an excessive amount of the discharge flow rate of the main oil pump 4 can be returned to the oil tank with minimum energy loss even if the load of the vibration exciter 1 fluctuates, that is, while suppressing heat generation. . A manually adjustable sizing orifice 11 is interposed and connected to the pipeline from the branch point B to the sub oil motor 8 to limit the flow rate of oil supplied to the sub oil motor 8 for driving the lubricating oil pump. The hydraulic pressure applied to the sub oil motor 8 is lowered. Since the branch orifice 11 can be manually adjusted, it is possible to adjust the throttle state to be appropriate according to the change in the temperature condition. Further, the pressure applied to the sub oil motor 8 is set to a constant value (50 kg / cm ² in this example).
In series with the auxiliary oil motor 8, a pressure reducing valve 12 is provided upstream thereof.
Is connected. Thus, an oil motor having a pressure resistance of 50 kg / cm ² can be used as the sub oil motor 8, which is effective in reducing the cost of the constituent members.
The lubricating oil pump 5 driven to rotate by the sub oil motor 8 sucks / discharges and circulates the oil accumulated in the sub chamber 1b provided below the vibration exciter 1.
Circulation is particularly effective for cooling the heat generating part.

The oil that has flowed through the sub oil motor 8 is supplied as lubricating oil into the main chamber 1a of the vibration exciter 1. In the middle of the supply line, a manually adjustable flow control valve (in this example, A variable throttle valve type 13) is interposed and connected. If for some reason oil leaks from the oil seal externally fitted to the rotary shaft of the main oil motor 3 for vibration generation, the leaked oil flows into the main chamber 1a of the vibration generator 1.
In the present invention, since hydraulic oil is also used as lubricating oil,
The hydraulic oil leaked from the main oil motor 3 for vibration generation is
Mixing with the lubricating oil in a does not in itself cause any other problems, but when the main chamber 1a is filled with oil, the oil is stirred by the rotating eccentric weight and not only causes loss of rotational energy due to stirring resistance, but also The oil may generate heat and may be overheated.

Therefore, the oil level cannot be kept constant only by being sucked by the lubricating oil pump 5, and when the oil level in the main chamber 1a rises, the flow regulating valve 13 is throttled to supply the oil. Reduce the oil level by reducing the volume. The flow control valve 13 may be narrowed down to such an extent that the lubricating oil of the main vibration motor is offset. However, if the amount of oil leakage is large, the flow control valve 13 may need to be closed and closed. Even if the flow regulating valve 13 is closed, the oil for driving the sub oil motor 8 must flow through the sub oil motor, so that the outlet of the sub oil motor 8 and the outlet of the main vibration Is provided with a bypass pipe line. Thereby, the flow control valve 13
, The oil flow path for rotating the sub oil motor 8 is secured.

[0019]

When the present invention is applied, most of the flow rate of the pressure oil discharged from the main oil pump is supplied to the main oil motor for vibration to rotate it. Then, after a part of the pressure oil discharged from the main oil pump rotates the auxiliary oil motor for driving the lubricating oil pump, it is guided to the main chamber of the vibration exciter to perform an action as lubricating oil, and The oil accumulated under the main chamber after performing the lubricating action is sucked by the lubricating oil pump and circulated. In this way, the hydraulic oil of the vibration exciter is also used as the lubricating oil, and the pressure oil discharged from one main oil pump is diverted to rationally excite the vibration while minimizing energy loss. In addition to being able to perform rotational driving and lubrication of the machine, when the load of the shaker fluctuates, the pressure balance and flow distribution between the main oil motor and the sub oil motor for the shake are automatically controlled. It has an excellent practical effect.

[Brief description of the drawings]

FIG. 1 is a hydraulic system diagram showing one embodiment of a lubrication device configured to carry out a method of lubricating a vibration exciter according to the present invention.

FIG. 2 is a chart illustrating pressure-flow characteristics of a main oil pump in the embodiment of FIG. 1 described above.

FIG. 3 is a hydraulic system diagram showing a lubricating device according to an embodiment in which the embodiment shown in FIG. 1 is improved.

FIG. 4 is a piping diagram showing a detailed configuration of a three-way flow valve in the lubricating apparatus of the embodiment shown in FIG. 3 described above.

FIG. 5 is a diagram in which a prime mover is added to a hydraulic system diagram in a conventional example of a hydraulic rotary exciter.

FIG. 6 is a hydraulic system diagram disclosed as FIG. 3 in Japanese Unexamined Patent Publication No. Hei 7-6188, “vibration pile driving device”.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Exciter, 1a ... Main room, 1b ... Sub room, 1c ... Rotating shaft,
1d: synchronous gear, 1e: eccentric weight, 2: engine, 2a
... Crank shaft, 2b ... Cam shaft, 2c ... Time gear, 3 ... Main oil motor for vibration, 4 ... Main oil pump, 5 ... Lubricating oil pump, 6 ... Orifice, 7 ... Diversion orifice, 8 ...
Sub oil motor, 9 ... operation valve, 10 ... three-way flow control valve,
10a: Main line, 10b: Variable orifice, 10c ...
Upstream release line, 10d pressure regulating valve, 10e downstream release line, 10f branch flow orifice, 10g differential pressure regulating valve, 10h pilot line, 11 branch flow orifice,
12: pressure reducing valve, 15: main chamber, 16: sub chamber, 24: hydraulic motor, 26: return hydraulic pump, 27: hydraulic motor, 3
0: lubricating oil supply unit, 31: hydraulic pump, 32: relief valve, 33: directional switching valve, 34, 40: flow control valve, B: branch point, P. U: Power unit.

Claims (17)

(57) [Claims] 1. A method for lubricating a hydraulic rotary type vibration exciter in which an eccentric weight (1e) provided in a main chamber (1a) is rotated by a main oil motor (3) for vibration generation. Hydraulic oil for rotating the oil motor and lubricating oil circulating through the exciter are shared with each other, and the oil discharged from the main oil pump (4) that discharges high-pressure oil, which is the power source of the exciter, is divided. One of the divided hydraulic oil is supplied to the main oil motor for vibration generation (3), and the other of the divided hydraulic oil is supplied to the main oil motor via a flow dividing orifice (7) for flow control. (3) The oil is supplied to the auxiliary oil motor (8) having a smaller capacity than that of (3), and the oil circulating through the auxiliary oil motor is supplied into the main chamber (1a) so that the exciter wears and cools. And the auxiliary oil motor (8) The lubricating oil pump (5) having a smaller capacity than the main oil pump (4) is driven to rotate, and the oil supplied to the main chamber (1a) and accumulated below the main chamber (1a) is removed by the lubricating oil pump (5). A method of lubricating a vibration exciter, comprising: inhaling and refluxing. 2. The high-pressure oil discharged from the main oil pump (4) is supplied to the main oil motor (3) via a three-way flow control valve (10). When the load decreases, the oil pressure on the main oil motor inflow side drops, and the discharge flow rate of the main oil pump increases, oil of a flow rate corresponding to the increased flow rate is returned from the three-way flow control valve to the oil tank. The method for lubricating a vibration exciter according to claim 1, wherein: 3. Except for the flow recirculated from the three-way flow control valve (10) to the oil tank, a majority of the flow circulating through the three-way flow control valve is directly transferred to the main vibration motor (3). ), And the remainder of the flow rate flowing through the three-way flow control valve is supplied to the auxiliary oil motor (8) via a variable branch orifice (11). 3. The lubrication method for an exciter according to claim 2, wherein the suction / discharge flow rate of the lubricating oil pump is maintained at an appropriate value by adjusting the throttle state of the deformed orifice. 4. A variable orifice (1) is provided in the middle of a main line (10a) connecting the discharge side line of the main oil pump (4) and oil motors as load devices in a hydraulic circuit.
0b), a pressure regulating valve (10d) is connected between the upstream side of the variable orifice and the oil tank, and the variable orifice (10b) is connected between the downstream side of the variable orifice and the oil tank. The three-way flow control valve (10) is constructed by connecting a differential pressure control valve (10g) composed of a relief valve responsive to the differential pressure between the inflow and outlet of the variable orifice (10b). 3. The method according to claim 2, wherein the pressure loss is suppressed within a predetermined value to prevent heat generation and temperature rise of the oil. 5. A pressure reducing valve (12) is connected and connected between the branch orifice (11) and the auxiliary oil motor (8),
4. The method according to claim 3, wherein the hydraulic pressure supplied to the lubricating oil pump is automatically reduced to reduce the required pressure resistance of the lubricating oil pump. 6. The sub oil motor (8) and the main chamber (1).
The flow rate of the oil supplied to the main chamber (1a) is controlled by interposing a flow control valve (13) in the middle of the pipeline connecting the a) and the flow rate of the oil supplied to the main chamber (1a). The described method of lubricating the exciter. 7. A valve of a type capable of adjusting the flow rate by manual adjustment as said flow rate control valve (13), and when an oil leaking from said main oil motor (13) to said main chamber (1a) occurs. The lubrication method for an exciter according to claim 6, wherein the flow rate of the flow rate control valve (13) is reduced to reduce the flow rate by an amount corresponding to the amount of oil leakage. 8. A bypass line (14) for connecting an inflow side of the flow control valve (13) and an outflow side of the main oil motor (3) for vibration generation is provided. The lubricating method for an exciter according to claim 7, characterized in that the oil pump for driving the auxiliary oil motor (8) is secured to continue the operation of the lubricating oil pump (5) even when the motor is closed. . 9. A hydraulic oil pump mounted to supply hydraulic oil to a hydraulic working device of the construction machine is used as the main oil pump (4), and a hydraulic working device of the construction machine is used. 2. The method for lubricating a vibration exciter according to claim 1, wherein the oil tank and the hydraulic oil in the oil tank are used as hydraulic oil and lubrication oil for the vibration exciter. 10. A device for lubricating a hydraulic rotary exciter, comprising: a main oil pump (4) for sucking and pumping hydraulic oil which is also used as lubricating oil for the exciter (1); A main oil motor (3) for vibration generation, a sub oil motor (8) for driving a lubricating oil pump, and a sub oil motor (8) connected in parallel with each other in a discharge side pipe of the oil pump; ), A branching orifice (7) for controlling the flow rate of the oil flowing through the auxiliary oil motor, a conduit for guiding the oil flowing through the auxiliary oil motor to the main chamber (1a) of the vibration exciter, A lubricating oil pump (5) for sucking and recirculating oil collected below a main chamber of the shaker. 11. A three-way flow valve (10) is provided on the discharge side of the main oil pump (4). When the discharge pressure of the main oil pump drops and the discharge flow increases, the three-way flow valve increases. The corresponding flow rate is automatically returned to the oil tank, and a substantially constant flow rate of the oil is supplied to the main oil motor (3) for vibration generation and the auxiliary oil motor (8) for driving the lubrication pump.
Characterized in that it is configured to be supplied to
A lubricating device for an exciter according to claim 10. 12. A branch point between the pipeline of the main oil motor (3) for vibration excitation connected in parallel and the sub oil motor (8) is denoted by B, and the branch point B and the sub oil motor ( The lubricating device for an exciter according to claim 10 or 11, wherein a diversion orifice (11) having a structure capable of adjusting a throttle state is interposed between the lubrication device and the orifice (8). . 13. The vibration generating device according to claim 12, wherein a pressure reducing valve (12) is interposed between the flow dividing orifice (11) and the auxiliary oil motor (8). Machine lubrication device. 14. The valve according to claim 11, wherein the three-way flow regulating valve is configured as follows.
Or a lubricating device for an exciter according to claim 12. A variable orifice (10b) is interposed and connected in the middle of a main pipe (10a) for guiding the inflowing pressure oil to oil motors as load devices, and branches from the inflow side of the variable orifice to communicate with the oil tank. The pressure relief valve (10) is connected to the upstream relief pipe (10c).
d) is inserted and connected, and a branch line is branched from the outlet side of the variable orifice, and is sequentially connected to the oil tank via the branch orifice (10f) and the differential pressure regulating valve (10g). 10e) is provided, wherein the differential pressure regulating valve is configured to operate to equalize the differential pressure generated between the inflow side of the variable orifice (10b) and the downstream side of the branch orifice (10f). Has become. 15. A flow control valve (13) having a structure capable of manually controlling a flow rate is interposed between the sub oil motor (8) and the main chamber (1a) of the vibrator. The lubricating device for an exciter according to any one of claims 10 to 14, wherein 16. An inflow side of the flow regulating valve (13),
A bypass line (14) communicating with the outflow side of the main vibration motor (3) is provided, and even if the flow control valve (13) is closed, the sub oil motor (8) is closed. 16. The lubricating device for an exciter according to claim 15, wherein the communication between the outflow side of the oil reservoir and the oil tank is maintained. 17. The main oil pump (4) is a diversion of a hydraulic pump mounted on a construction machine to supply pressure oil to a hydraulic working device mounted on the construction machine. The lubricating device for an exciter according to claim 10, characterized in that: