JP2003340747A - Automatic grease feeder for hydraulic striking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic grease feeder for a hydraulic striking device to automatically feed grease which can be easily operated by anybody. <P>SOLUTION: In the automatic grease feeder for the hydraulic striking device to feed grease to a breaker part of the hydraulic striking device by a grease cartridge 15 via an operation of a feed control unit 1, low-pressure oil discharged by the operation of the hydraulic striking device is fed to the feed control unit for a power source for pressurization. The pressure is applied inside the feed control unit, and grease from the grease cartridge is pumped to a breaker part of the hydraulic striking device. The negative pressure is applied in the feed control unit by stopping the hydraulic striking device, and the grease is sucked from the grease cartridge so as to be pumped to the breaker part of the hydraulic striking device. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic greasing device in a hydraulic striking device.

[0002]

2. Description of the Related Art Conventionally, a hydraulic impact device has been constructed such that a breaker is impacted by a piston utilizing hydraulic pressure to crush concrete.

For example, a cylinder chamber is formed in the upper half part of a cylindrical breaker body such as a hydraulic breaker as a hydraulic striking device, and a striking piston is accommodated and arranged so as to be reciprocally slidable. A chisel having a tip portion protruding from the breaker body is housed in the half portion so as to be reciprocally slidable on the same axis as the striking piston.

When using such a hydraulic striking device,
Grease must be supplied to the chisel part so that the reciprocating motion causes wear and seizure of the chisel part.

Conventionally, the grease must be supplied to the chisel portion from a grease case integrally attached to the hydraulic striking device via a manual lever pressurizer by the manual operation of an operator. It was

[0006]

However, the supply of such grease to the chisel portion must be performed manually by the operator, and since the operation is performed during the operation, the supply of grease at the work site becomes complicated, which is unsatisfactory. There were also accidents such as burning the chisel part in preparation.

Therefore, there is a defect that causes wear and seizure unless grease is supplied at regular intervals.

[0008]

In order to solve the above problems, the grease supply control is automated so that the operator does not have to supply the grease.
In order to provide a hydraulic striking device that can be easily used by anyone, the present invention according to claim 1 lubricates grease from a grease cartridge to a breaker portion of the hydraulic striking device through operation of a feed control unit. In a greasing device for a hydraulic striking device, a low-pressure oil discharged by the operation of the hydraulic striking device is fed to the feeding control unit as a power source for pressurizing operation, thereby the feeding control unit Pressurize the inside to send the grease from the grease cartridge to the breaker part of the hydraulic striking device, and
Automatic degreasing for a hydraulic striking device, characterized by negatively operating the inside of the feed control unit by stopping the operation of the hydraulic striking device, and sucking out grease from the grease cartridge for pressure delivery to the breaker part of the hydraulic device. It is intended to provide a device.

The present invention according to claim 2 is characterized in that grease is automatically supplied to the hydraulic striking device by a cylinder mechanism arranged in a feed control unit using low pressure oil as a power source. It is intended to provide an automatic greasing device.

According to the third aspect of the present invention, when the grease is pressure-fed to the breaker portion, more than necessary grease is returned from the bypass circuit to the grease cartridge every stroke. It is intended to provide a greasing device.

Further, according to the present invention of claim 4, there is provided an automatic greasing device characterized in that the grease cartridge is detachably fixedly held to the feeding control unit.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The automatic greasing device according to the present invention comprises:
Automating the supply of grease is a problem that grease supply in a conventional hydraulic impact device was apt to be complicated because it was performed manually by an operator who has specialized knowledge and many experiences. The hydraulic striking device can be easily operated by anyone.

That is, when a hydraulic hammering device is used to crush concrete, an automatic greaser automatically lubricates the reciprocating sliding portion of the hydraulic hammering device so that an appropriate amount of grease is always stabilized. The temperature rise due to the friction of the chisel portion can be efficiently suppressed and the seizure can be prevented.

An automatic greasing device for automatically supplying grease to a chisel portion holds a grease cartridge for grease supply fixedly in a feed control unit having a cylinder mechanism, and discharges it by operating and stopping a hydraulic striking device. Also, by composing so that the low-pressure oil to be returned can be injected into and discharged from the automatic greasing device, the feed control unit of the automatic greasing device and the chisel portion of the hydraulic striking device are connected by an oil passage, The automatic greasing device is capable of supplying a proper amount of grease to the chisel portion of the hydraulic striking device by the operation of the feed control unit.

In this feed control unit, the low-pressure oil discharged by the operation of the hydraulic striking device is fed as the power source of the cylinder mechanism in the feed control unit, whereby the cylinder mechanism in the feed control unit is supplied. To pressurize the grease from the grease cartridge installed in the automatic greasing device to the breaker part of the hydraulic striking device, and the spring compressed by the operation stop of the hydraulic striking device returns. As a result, the low-pressure oil in the supply control unit is pushed back and the volume change when the piston returns causes negative pressure in the supply control unit, sucking grease from the grease cartridge and supplying it to the chisel part of the hydraulic system. It is possible.

With this structure, the sealing property of the feeding control unit of the automatic greasing device can be set low, and it is not necessary to use pressure-resistant parts, so that the product cost can be reduced. Further, the mechanism for controlling the automatic greasing operation to the grease by operating / stopping the hydraulic striking device can be simplified, and the product can be made compact and the product cost can be reduced.

Moreover, the automatic greasing device forms a return bypass circuit so as to bypass the grease to the hydraulic striking device and bypasses the grease to the grease cartridge, and is generated when the grease is pressure-fed and supplied to the breaker portion. The excess grease that is used is returned to the grease cartridge from the return bypass circuit.

Therefore, the control mechanism for supplying an appropriate amount of grease to the hydraulic striking device can be simplified, the product can be made compact, and the product cost can be reduced.

Further, since the grease cartridge is detachably fixed and held in the cartridge holding portion provided in the automatic control unit, the grease cartridge can be easily and detachably held in the main body of the automatic greasing device.
The grease cartridge can be easily replaced and the product cost can be reduced.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an automatic greasing device A in a hydraulic striking device according to the present invention will be described below with reference to the drawings.

Reference numeral B shown in FIG. 1 is a hydraulic striking device. The hydraulic striking device B is used by being attached to the tip of the boom of the backhoe, and is hydraulically driven using the hydraulic device of the backhoe. Has been done.

In the hydraulic striking device B, a cylinder chamber (not shown) is formed in the upper half of the breaker body, and the striking piston is housed in the cylinder chamber so that the striking piston can slide back and forth. The chisel 8 is slidably housed on the same axis as the striking piston.

Therefore, at a construction site or the like, the hydraulic percussion device B disposed at the tip of the boom of the backhoe is applied to the object to be excavated, and the hydraulic percussion device B is actuated by hydraulic drive to dispose at the tip portion thereof. Various operations such as crushing and chipping of concrete are performed by the reciprocating sliding movement of the chisel 8.

However, since the reciprocating sliding movement of the chisel 8 has a very high surface pressure, the reciprocating sliding portion causes seizure and wear due to friction.

Therefore, grease is supplied to the reciprocating sliding portion of the chisel 8 to reduce the coefficient of friction during reciprocating sliding to prevent temperature rise and wear due to friction. Is to automatically supply the grease in conjunction with the hydraulic operation of the striking piston.

That is, the automatic greasing device A according to the present invention is integrally attached to a part of the hydraulic striking device B, and when the hydraulic striking device B is operated, the bushing of the chisel 8 that reciprocates and slides violently. An appropriate amount of grease is supplied to the portion 9 in conjunction with the hydraulic operation of the striking piston.

This automatic greasing device A has a feed control unit 1 having a cylinder mechanism using low pressure oil as a power source, an entrance 2 for receiving low pressure oil, and an appropriate amount of grease by the feed control unit 1. And a delivery port 5 for delivering

Moreover, the low pressure oil pipe 3 discharged by the operation of the hydraulic striking device B and the inlet 2 of the automatic greasing device A are communicated with each other through a hose 4, and the automatic greasing device A
Is communicated with the grease replenishment pipe 6 in the hydraulic striking device B via the hose 7, and therefore the low-pressure oil discharged by the operation of the hydraulic striking device B is Oil is sent to the feed control unit 1 of the automatic greasing device A via the hose 4, and the low-pressure oil is used as a power source to drive the cylinder mechanism in the feed control unit 1 of the automatic greasing device A. An appropriate amount of grease is automatically fed from the delivery port 5 of the automatic greasing device A to the grease replenishment pipe 6 of the hydraulic striking device B via 7, and the grease is supplied to the chisel portion 8 and the bush portion 9 which make a reciprocating sliding motion. I try to lubricate.

Next, the greasing device A and the hydraulic striking device B
Then, the circulation of the hydraulic oil between the hydraulic device 40 of the backhoe and the hydraulic device 40 of the backhoe will be described, and then the feed control unit 1 and the grease cartridge 15 of the automatic greasing device A according to the present invention will be described.

As shown in FIG. 2, the oil supply port O of the hydraulic device 40 of the backhoe and the oil supply port Bi of the hydraulic striking device B are communicated with each other via a stop valve 41. The oil port Bo and the oil receiving port I of the hydraulic device 40 of the backhoe are communicated with each other via a stop valve 42.

Further, the oil discharge port Bo of the hydraulic striking device B is communicated with the entry port 2 of the automatic greasing device A, and the automatic greasing device A
Of the hydraulic impact device B is communicated with the grease supply pipe 6.

In the automatic greasing device A, the grease cartridge 15 and the oil feeding control unit 1 are in communication with each other.

The backhoe hydraulic system 40 comprises an oil tank 43, an engine 44, a hydraulic pump 45, a control valve 46, an oil cooler 47, and a filter 48.

The oil tank 43 is in communication with a hydraulic pump 45 which is interlocked with the engine 44, and the hydraulic pump 45 is in communication with a control valve 46.

The control valve 46 is communicated with the oil supply port O which is communicated with the oil supply side of each portion (only the hydraulic impact device B is shown) which requires hydraulic control of the hydraulic impact device B or the like. ing.

Each part requiring hydraulic control (only hydraulic striking device B is shown) and control valve 4
The oil receiving port I communicating with 6 is connected to the oil cooler 4
7, the oil cooler 47, and the oil tank 43 via the filter 48.

With this configuration, the hydraulic oil in the oil tank 43 of the hydraulic device 40 of the backhoe is sent to the control valve 46, which is a central control unit, by the hydraulic pump 45 driven by the engine 44 of the backhoe. The hammering work is carried out by being fed to the hydraulic hammering device B via 41.

The low-pressure oil discharged from the hydraulic striking device B is sent to the automatic greasing device A, sent to the oil cooler 47 via the valve 42 and cooled, and then the filter 48.
Is returned to the oil tank 43 via.

On the other hand, the low-pressure oil fed to the automatic greasing device A activates the automatic greasing device A, and an appropriate amount of grease is supplied from the automatic greasing device A to the hydraulic striking device B. Become.

Next, the feeding control unit 1 and the grease cartridge 15 of the automatic greasing device A will be described.

As shown in FIGS. 3 and 4, the automatic greasing device A holds the feeding control unit 1 for automatically supplying an appropriate amount of grease to the hydraulic striking device B and the grease cartridge 15 in the feeding control unit 1. Cartridge holding portion 16 for fixing and grease cartridge 1 for supplying grease
It consists of 5.

The feeding control unit 1 includes a hydraulic impact device B.
The inlet 2 for the low-pressure oil discharged by the operation of 1 to enter the feed control unit 1, the outlet 5 that finally feeds the grease to the hydraulic striking device B, and the grease for the feed control unit 1. The control unit 18 has a cylinder mechanism for feeding an appropriate amount.

The entrance 2 communicates with the low-pressure oil pipe 3 discharged by the operation of the hydraulic striking device B through a hose 4, and allows the low-pressure oil discharged from the hydraulic striking device B to enter.
The feeding control unit 1 is incorporated into the feeding control unit 1.

The delivery port 5 communicates with the grease replenishing pipe 6 in the hydraulic striking device B through a hose 7, and an appropriate amount of grease supplied by the feeding control unit 1 is hydraulically striking from the automatic greasing device A. It is designed to be sent to the device B.

The control section 18 is a cylinder section 19 communicating with the inlet port 2, and a stock section 20 for temporarily storing the grease sucked from the grease cartridge 15 at the output section of the cylinder section 19 and a delivery section 5 are provided. The check valve 22 for preventing the reverse flow of grease is arranged in this order.

The cylinder portion 19 includes a piston 23 which is operated by the low pressure oil that has entered from the inlet port 2, a return spring 24 which applies a return urging force to the piston 23, and a cylinder chamber 14 which houses the piston 23 and the return spring 24. And consists of.

A grease inlet 25 communicating with the grease cartridge 15 is formed on the lower surface of the stock portion 20, and a check valve (not shown) for preventing the grease from flowing backward is provided in the grease inlet 25. Is provided.

Further, a return bypass circuit 2 as a bypass circuit is provided between the upper portion of the delivery port 5 for delivering grease to the hydraulic striking device B and the oil delivery port of the grease cartridge 15.
8, the middle part of the return bypass circuit 28 penetrates the case of the feed control unit 1 and is opened to the outside, and a nipple 29 is provided in the penetrating portion 35 at the opening. The nipple 29 can be used to manually supply grease to the hydraulic striking device B.

Next, the cartridge holding portion 16 will be described.

The cartridge holding portion 16 is formed in a cylindrical shape with one end open, and is connected to the lower portion of the feed control unit 1. A supply port 30 communicating with the grease inlet 25 of the feed control unit 1 is formed in the cartridge holding portion 16.

Further, a holder 31 is continuously provided at the opening edge of the cartridge holding portion 16, and the holder 31 has two
It is made of a wire, and is gently bent and extended downward from both the lower left and right sides of the cartridge holding portion 16 along the front side of the grease cartridge 15, and its free end holds the bottom surface of the grease cartridge 15. As described above, the contact portion 34 bent into a substantially right-angled shape is formed, and further, the terminal end portion connects the two wires in a loop shape.

Moreover, the two wire base ends of the holder 31 are rotatably attached to the opening edge wall of the cartridge holding portion 16.

The grease cartridge 15 is formed in the shape of a cylindrical can containing the grease to be supplied, and the supply port 30 for supplying the grease is formed in the upper part of the cylindrical main body.

Also, the bottom portion 2 of the grease cartridge 15
6 has the same shape as the supply portion 27 for supplying grease from the grease cartridge 15, is configured to be slidable along the inner wall surface of the grease cartridge 15, and has a concave portion at the center of the bottom surface of the bottom portion 26. Forming 33,
The loop portion at the end portion of the holder 31 is made to be easily engaged.

As described above, the supply port 30 of the grease cartridge 15 and the delivery port 5 for supplying grease to the hydraulic striking device B are communicated with each other via the control unit 18, and the hydraulic striking device B is also connected. The low-pressure oil discharged by the operation of 1 flows into the control section 18 of the feed control unit 1 from the entrance 2, and this low-pressure oil causes the piston 23 in the cylinder section 19 of the feed control unit 1 to return to the return spring 24. The check valve 22 is opened by pressurizing the grease in the stock portion 20 formed at the output portion of the piston 23 while operating against the hydraulic pressure, and the grease is delivered from the delivery port 5 to the hydraulic striking device B automatically. Supply.

Excessive grease generated at this time is guided to the return bypass circuit 28 and returned to the grease cartridge 15 communicating with the return bypass circuit 28.

When the hydraulic striking device B stops operating, the return spring 24 that has been compressed is returned to the initial state, so that low-pressure oil returns to the hydraulic striking device B from the entrance 2 of the feed control unit 1. To be done. Therefore, due to the volume change when the piston returns, the inside of the feed control unit 1 is depressurized, the stock portion 20 becomes negative pressure, and the grease is sucked out from the grease cartridge 15 communicating with the stock portion 20 to the stock portion 20. Will be filled.

As described above, each time the grease is replenished from the grease cartridge 15, the grease cartridge 15
The grease in the inside of the grease cartridge 15 is reduced, and the inside of the grease cartridge 15 is in a depressurized state.
The bottom portion 26 inside the container 5 rises so that grease can be easily supplied to the stock portion 20 at all times.

Further, since the shape of the bottom portion 26 is the same as the shape of the supply portion 27 for supplying grease from the grease cartridge 15, the grease filled in the supply port 30 of the grease cartridge 15 can be used up to the end. You can do it.

The grease cartridge 15 is detachably held in the feed control unit 1 by the cartridge holding portion 16. When the grease cartridge 15 is mounted, the supply port 30 of the grease cartridge 15 is communicated with the cartridge holding portion 16. After being inserted into the pipe 32, the abutting portion 34 formed on the holder 31 is pushed into and engaged with the concave portion 33 formed on the bottom surface of the grease cartridge 15 so as to be mounted and fixed.

When the grease cartridge 15 is removed, the contact portion 34 of the holder 31 is removed from the recess 33 formed on the bottom surface of the grease cartridge 15 to remove the grease cartridge 15, and the grease cartridge 15 that has run out of grease is replaced with a new grease cartridge 15. 15
The grease can be easily replenished by simply replacing the grease cartridge with a new one, and the grease cartridge 15 can be easily replaced.

As described above, by adopting the cartridge type, the grease cartridge 15 can be easily attached / detached to / from the main body of the automatic greasing device, facilitating the replacement of the grease cartridge 15 and reducing the manufacturing cost. be able to.

The automatic greasing device A according to the present invention described above.
Is for automatically supplying grease in conjunction with the operation of the low pressure oil of the hydraulic striking device B. In addition to automatic greasing, grease can be manually supplied to the striking device. I am configuring.

That is, by removing the nipple 29 of the case penetrating portion provided in the middle of the return bypass circuit 28 and connecting a manual greasing device (not shown) instead, a hydraulic striking device from the delivery port 5 is connected. The grease can be manually supplied to B. Therefore, if the automatic greasing device A fails, the work of the hydraulic striking device B can be continued by using the manual greasing device.

As described above, the automatic greasing device A according to the present invention is specified because the grease supply in the conventional hydraulic striking device B is performed manually by an operator who has specialized knowledge and many experiences. The problem that only one person can operate is solved by automating the supply of grease so that anyone can operate the hydraulic striking device B easily.

Further, by automatically supplying grease, an appropriate amount of grease is constantly and stably supplied to the reciprocating sliding portion of the hydraulic striking device B, so that temperature rise due to friction can be efficiently suppressed and seizure can be prevented. In addition to the prevention, wear due to friction can be prevented.

[0067]

The present invention is embodied in the above-described mode, and has the following effects.

(1) According to the invention described in claim 1, the hydraulic striking device for supplying grease from the grease cartridge to the breaker portion of the hydraulic striking device through the operation of the feed control unit is provided. In the greasing device, the low-pressure oil discharged by the operation of the hydraulic striking device is fed to the feed control unit as a power source for pressurizing operation, thereby pressurizing the inside of the feed control unit, The grease from the grease cartridge is pumped to the breaker part of the hydraulic striking device, and the operation of the hydraulic striking device is stopped to negatively operate the inside of the feed control unit to pump the grease from the grease cartridge to the breaker part of the hydraulic device. By sucking out as much as possible, it is possible to reliably and stably supply grease to the hydraulic striking device without relying on human resources with specialized knowledge or experience. Will be able greasing Te, a hydraulic striking device everyone has easily operated can effectively.

(2) According to the invention described in claim 2, the cylinder mechanism arranged in the feed control unit using low pressure oil as a power source automatically supplies grease to the hydraulic striking device. Therefore, it is possible to simplify the mechanism that automatically lubricates the automatic striking device to the hydraulic striking device and the control mechanism that automatically replenishes grease from the grease cartridge. Can be lowered.

(3) According to the invention described in claim 3, when the grease is pressure-fed to the breaker portion, more than necessary grease is returned from the bypass circuit to the grease cartridge every stroke. As a result, the control mechanism for supplying an appropriate amount of grease can be simplified, so that the product can be made compact and the product cost can be reduced.

(4) According to the present invention as set forth in claim 4, the grease cartridge is detachably fixed to the feeding control unit so that the grease cartridge can be attached to the main body of the automatic greasing device. Since the configuration of the above can be simplified, the grease cartridge can be easily replaced and the product cost can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of one mounting example of an automatic greasing device according to the present invention.

FIG. 2 is an explanatory view showing the cooperative operation of the transport unit and the grease cartridge of the automatic greasing device according to the present invention, the striking mechanism of the hydraulic striking device, and the hydraulic device of the backhoe.

FIG. 3 is an explanatory diagram of a greasing operation in one embodiment of the automatic greasing device according to the present invention.

FIG. 4 is an explanatory diagram of an excessive grease returning operation in one embodiment of the automatic greasing device according to the present invention.

[Explanation of symbols]

A automatic greasing device B hydraulic impact device 1 Feed control unit 2 entrance 5 outlets 18 Control unit 22 Check valve 23 pistons 24 Return spring 28 Return bypass circuit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tadashi Yoshimura             5733 Nobara, Nakahara-cho, Sanyo-ki-gun, Saga             Toyo Aircraft Co., Ltd. (72) Inventor Kisho Yadoumaru             5733 Nobara, Nakahara-cho, Sanyo-ki-gun, Saga             Toyo Aircraft Co., Ltd. F term (reference) 2D058 AA12 CB03 DA27

Claims (4)

[Claims] 1. A greasing device for a hydraulic striking device that greases grease from a grease cartridge to a breaker portion of the hydraulic striking device through the operation of a feed control unit. By sending the low-pressure oil discharged to the feed control unit as a power source for pressurizing operation, the feed control unit is pressurized, and the grease from the grease cartridge is broken by the breaker of the hydraulic striking device. The hydraulic striking device is characterized in that it is pressure-fed to a part and negatively operates in the feed control unit by stopping the operation of the hydraulic striking device to suck out grease from the grease cartridge to be pumped to the breaker part of the hydraulic device. Automatic greasing device for. 2. The automatic greasing device according to claim 1, wherein grease is automatically supplied to the hydraulic striking device by a cylinder mechanism arranged in a feed control unit using low-pressure oil as a power source. . 3. The automatic greasing device according to claim 1, wherein when the grease is pressure-fed and supplied to the breaker portion, more than necessary grease is returned to the grease cartridge from the bypass circuit every stroke. 4. The grease cartridge is detachably fixedly held in the feed control unit.
The automatic greasing device according to any one of 1 to 3.