CN114644299A

CN114644299A - Hydraulic working device

Info

Publication number: CN114644299A
Application number: CN202110986359.0A
Authority: CN
Inventors: 生出荣助
Original assignee: Ogura KK
Current assignee: Ogura KK
Priority date: 2020-12-17
Filing date: 2021-08-26
Publication date: 2022-06-21
Also published as: JP7489103B2; JP2022096387A

Abstract

The invention provides a hydraulic working device. The hydraulic working device is provided with: a drive unit (10); a tool unit (40); a flexible connecting member (30) connecting the tool unit (40) and the drive unit (10); a battery unit (60) having a battery (62) for supplying electric power to the drive unit (10); and a return operation unit (80) that can be attached to the drive unit (10) and that returns the return liquid from the tool (41) to the drive unit (10) via the connecting member (30). The tool unit (40) has a switch unit (50), and the switch unit (50) has a pressure fluid generation unit operation switch (54) and a tool operation switch (52).

Description

Hydraulic working device

Technical Field

The present invention relates to a hydraulic working apparatus.

Background

For example, when rescuing a person trapped in a vehicle in a traffic accident or a person trapped in a building in an earthquake disaster, a mobile hydraulic working device is used. As such a hydraulic working apparatus, the following apparatuses have been known: a device in which a tip tool such as a cutter or an expander is directly attached to a pump section with a motor for generating a pressure liquid, as disclosed in Japanese patent application laid-open No. 2002-78988 (JP 2002-78988A); a device in which a tip tool and a pump section with a motor are connected by a hydraulic hose is disclosed in japanese patent application laid-open No. 2005-201285 (JP2005-201285a), which is a publication of a japanese patent application.

In an apparatus in which a tip tool is directly attached to a pump section with a motor as disclosed in japanese patent laid-open publication No. 2002-78988 (JP2002-78988A), there are the following problems: the weight of the device itself becomes heavy, and the transportation becomes a burden, or the motor part becomes an obstacle during the operation, and the original function of the device may not be exhibited.

On the other hand, in an apparatus in which a tip tool and a pump section with a motor are connected by a hydraulic hose as disclosed in japanese patent application laid-open No. 2005-201285 (JP2005-201285a), there is a problem that both a person operating the tip tool and a person operating the pump with the motor are required. That is, the person operating the tip end tool inserts the tip end tool into a site to be pried open in a vehicle or a building. In this state, when the user operating the pump with the motor presses the switch with his or her finger to operate the motor, the tip tool is operated, and when the user releases his or her finger from the switch to stop the motor, the tip tool is stopped. When a person who operates the pump with the motor pulls the return lever, the spool moves inside the pump section and the return passage of the pressure liquid opens. Thereby, the tip tool is restored to the initial state. In such a device, there are problems as follows: since two persons are required to operate the pump, if the person operating the tool and the person operating the pump with the motor do not communicate smoothly, there is a possibility that the work cannot be performed properly.

Disclosure of Invention

The present invention has been made in view of the above points, and an object of the present invention is to provide a hydraulic working apparatus including: when the site where the work is performed is narrow and the work needs to be performed with the drive unit and the tool unit separated from each other, even one worker can operate the tool, and thus, the operability can be improved.

The hydraulic working apparatus of the invention is characterized in that,

the hydraulic working device is provided with:

a drive unit having: a motor and a pressure liquid generating unit that generates pressure liquid by rotating a rotating member by the motor;

a tool unit having: a tool that operates using a pressure fluid; and a switch unit having a pressure fluid generating unit operation switch and a tool operation switch;

a flexible connecting member that connects the tool unit and the driving unit, supplies the pressure fluid generated by the pressure fluid generating unit to the tool, and returns a return fluid from the tool to the pressure fluid generating unit;

a battery unit having a battery for supplying electric power to the drive unit; and

a return operation unit, attachable to the drive unit, for starting: returning fluid from the tool to the drive unit via the connecting member,

when the pressure fluid generating unit operating switch is operated, the motor is supplied with electric power from the battery, the pressure fluid generating unit generates pressure fluid, and the generated pressure fluid is supplied to the tool unit by the connecting member,

when the tool operation switch is operated, the return operation unit operates, and return liquid is returned from the tool to the drive unit via the connecting member.

According to the hydraulic working apparatus of the present invention, when the site where work is performed on site is narrow and it is necessary to perform work with the drive unit and the tool unit separated from each other, even one worker can operate the tool, and thus operability can be improved.

Drawings

Fig. 1 is a configuration diagram showing a configuration of a hydraulic work apparatus according to an embodiment of the present invention.

Fig. 2 is a configuration diagram showing a state in which a tip tool of the hydraulic working apparatus shown in fig. 1 is operated.

Fig. 3 is a circuit diagram of the hydraulic working apparatus shown in fig. 1 and the like.

Fig. 4 is an enlarged configuration view showing an urging member and a spool attached to a tip end of a solenoid in the hydraulic operating device shown in fig. 1 and the like.

Fig. 5 is a structural diagram showing a structure of a conventional hydraulic working apparatus.

Fig. 6 is a configuration diagram showing a state in which the tip tool of the hydraulic working apparatus shown in fig. 5 is operated.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The hydraulic working apparatus according to the present embodiment is used for rescue and the like, and can pry open a gap between objects such as doors in a building at an accident site with a tool at the top end. Fig. 1 to 4 are diagrams illustrating a hydraulic operating device according to the present embodiment. Fig. 1 is a configuration diagram showing a configuration of a hydraulic work apparatus according to the present embodiment, and fig. 2 is a configuration diagram showing a state in which a tip tool of the hydraulic work apparatus shown in fig. 1 is operated. Fig. 3 is a circuit diagram of the hydraulic working apparatus shown in fig. 1 and the like. Fig. 4 is an enlarged structural view showing a pushing member and a spool attached to a tip end of a solenoid in the hydraulic operating device shown in fig. 1 and the like. Fig. 5 is a structural diagram showing a structure of a conventional hydraulic working apparatus, and fig. 6 is a structural diagram showing a state in which a tip tool of the hydraulic working apparatus shown in fig. 5 is operated.

As shown in fig. 1 and 2, the hydraulic working apparatus according to the present embodiment includes: a drive unit 10; a tool unit 40; a connecting member 30 connecting the driving unit 10 and the tool unit 40; and a battery unit 60 for supplying electric power to the drive unit 10.

The drive unit 10 has: a grip 12 that is held by a worker with one hand; a motor 14 such as an electric motor; a rotating member 16 having an elongated rod shape and attached to a rotating shaft of the motor 14; a pressure liquid generating unit 17 that generates pressure liquid by rotation of the rotating member 16; and a drive switch 28 operated by the fingers of the operator who holds the grip portion 12.

An attached portion 13 is provided below the grip portion 12. A battery 62 of a battery unit 60 described later is detachably mounted to the mounted portion 13. In addition to the battery 62, the mounting case 68 of the battery unit 60 can be detachably mounted on the mounted portion 13. Fig. 1 and 2 show a state in which the mounting case 68 is mounted to the mounted portion 13.

In the drive unit 10, when the drive switch 28 is operated by the fingers of the operator gripping the grip portion 12, electric power is supplied from the battery 62 to the motor 14, and the rotating member 16 attached to the motor 14 is rotated by the motor 14.

As shown in fig. 1 and the like, a liquid chamber 20 is provided around the rotary member 16. The pressure liquid generating unit 17 includes: an eccentric member 18 attached to the tip of the rotary member 16; and a piston 19 that moves up and down by the rotation of the eccentric member 18. The eccentric member 18 is eccentric with respect to the axis of the rotary member 16, and a bearing such as a needle bearing is attached to the outer peripheral surface of the eccentric member 18. The piston 19 is constantly urged toward the outer peripheral surface of the bearing by a spring, not shown. Therefore, when the rotary member 16 rotates, the eccentric member 18 and the bearing rotate eccentrically with respect to the axis of the rotary member 16, and the piston 19 moves up and down, and the pressure fluid is supplied from the fluid chamber 20 to the connecting member 30, and the pressure fluid is supplied from the connecting member 30 to the tool unit 40, whereby the tool 41 of the tool unit 40 operates.

As shown in fig. 1 and 2, a 1 st liquid path 22 and a 2 nd liquid path 24 for feeding pressure liquid from the liquid chamber 20 to the connecting member 30 are provided in series inside the drive unit 10. A spool 26 is disposed between the 1 st fluid passage 22 and the 2 nd fluid passage 24. When the rotary member 16 rotates in a state where no force is applied to the spool 26 from the outside of the drive unit 10, the piston 19 moves up and down, and pressure liquid is supplied from the liquid chamber 20 to the connecting member 30 via the 1 st liquid passage 22 and the 2 nd liquid passage 24. On the other hand, when a force is applied to the spool 26 from the outside of the drive unit 10 and the spool 26 is pushed into the drive unit 10, the 1 st fluid passage 22 and the 2 nd fluid passage 24 are blocked by the outer peripheral surface of the spool 26, and the 2 nd fluid passage 24 and the fluid chamber 20 communicate with each other by a space formed inside the spool 26. Thereby, the return liquid is returned from the tool unit 40 to the liquid chamber 20 of the drive unit 10 via the connecting member 30. Details of such operations will be described later.

The connecting member 30 is constituted by, for example, a flexible hose 32. Specifically, the hose 32 is formed of a flexible member having a strength capable of withstanding a high pressure, and a fluid path for supplying a pressure fluid from the drive unit 10 to the tool unit 40 or returning a return fluid from the tool unit 40 to the drive unit 10 is formed inside the hose 32.

The tool unit 40 has: a tool 41 that operates with pressure fluid that is generated by the pressure fluid generation portion 17 of the drive unit 10 and that is delivered from the drive unit 10 to the tool unit 40 by the connection member 30; and a switching section 50. The tool 41 has: a cylinder 42 having a flange member 45 attached to an upper end thereof; a piston 43 housed inside the cylinder 42 and reciprocating in the vertical direction in fig. 1 and 2; a base member 44 attached to a tip end (a lower end in fig. 1 and 2) of the piston 43; and a spring 48 (see fig. 2) provided inside the cylinder 42. As shown in fig. 2, a liquid chamber 46 is provided inside the cylinder 42, and the liquid chamber 46 communicates with a liquid path formed inside the hose 32 of the connecting member 30. When the pressure fluid is supplied from the connecting member 30 to the tool 41 (specifically, the fluid chamber 46) of the tool unit 40, the piston 43 is relatively moved in the downward direction in fig. 2 with respect to the cylinder 42 by the pressure fluid. This increases the distance between the flange member 45 attached to the upper end of the cylinder 42 and the base member 44, and thus a gap between objects such as doors in a building at an accident site can be pried open.

In addition, one end of a spring 48 provided inside the cylinder 42 is connected to an inner wall of the cylinder 42 facing the liquid chamber 46, and the other end of the spring 48 is connected to the piston 43. Then, the piston 43 is urged in a direction to be accommodated in the cylinder 42 by a force of the spring 48 to return from the extended state to the original state. That is, since the spring 48 is in an extended state in a state where the piston 43 is relatively moved downward from the cylinder 42 as shown in fig. 2, a force that moves the piston 43 upward in fig. 2 toward the inside of the cylinder 42 is given by a force that tends to contract the spring 48.

The switch unit 50 is attached to the tool 41 by a plurality of screws, for example. The switch unit 50 includes a tool operation switch 52 and a pressure fluid generating unit operation switch 54. The tool operation switch 52 and the pressure fluid generating portion operation switch 54 are buttons pressed by the fingers of the operator. The functions of the tool operation switch 52 and the pressure fluid generating section operation switch 54 will be described in detail later.

The battery unit 60 includes: a battery 62 for supplying electric power to the drive unit 10; a battery adapter 64 to which the battery 62 is detachably attached; and a mounting case 68 connected to the battery adapter 64 via the 3 rd electric wire 66. The battery 62 is a secondary battery such as a lithium ion battery or a nickel metal hydride battery. The 3 rd electric wire 66 is configured to transmit electric power between the battery adapter 64 and the mounting case 68. When the mounting case 68 is mounted to the mounted portion 13 of the drive unit 10, the electric power transmitted from the 3 rd electric wire 66 can be transmitted to the motor 14.

As shown in fig. 1 and the like, a switching unit 70 is attached to the mounting case 68, and a relay 72 is disposed inside the switching unit 70. The switching unit 70 is detachably attached with a 1 st connector 74 and a 2 nd connector 78, respectively. One end of the 1 st electric wire 76 is connected to the 1 st connector 74, and the other end of the 1 st electric wire 76 is connected to a return operation unit 80 described later. One end of the 2 nd electric wire 56 is connected to the 2 nd connector 78, and the other end of the 2 nd electric wire 56 is connected to the tool operation switch 52 and the pressure fluid generating unit operation switch 54 of the switch unit 50.

In the hydraulic working apparatus of the present embodiment, the return operation portion 80 is detachably attached to the drive unit 10. Specifically, the return operation unit 80 is attached to the drive unit 10 by a plurality of screws, for example. The return operation unit 80 starts the following operations: the return liquid is returned from the tool 41 of the tool unit 40 to the liquid chamber 20 of the drive unit 10 via the connecting member 30. More specifically, the return operation unit 80 includes: a solenoid 82; and a pushing member 84 attached to a tip end of the solenoid 82 and operated by the solenoid 82. When the solenoid 82 is not operated, the urging member 84 is thus located at a position slightly separated from the spool valve 26 of the drive unit 10 as shown in fig. 4. On the other hand, when the solenoid 82 is operated, the pushing member 84 is attracted toward the solenoid 82, the pushing member 84 moves in the right direction in fig. 4, and the spool 26 is pushed into the interior of the drive unit 10 by the pushing member 84. Thus, the 1 st fluid passage 22 and the 2 nd fluid passage 24 are blocked by the outer peripheral surface of the spool 26, and the 2 nd fluid passage 24 and the fluid chamber 20 are communicated with each other by a space formed inside the spool 26. In the tool unit 40, a force in a direction of being accommodated in the cylinder 42 is applied to the piston 43 by a force of the spring 48 to return from the extended state to the original state. The piston 43 is moved upward in fig. 2 toward the inside of the cylinder 42 by the force applied by the spring 48, and the liquid chamber 46 formed between the inner wall of the cylinder 42 and the piston 43 is narrowed, so that the return liquid is returned from the liquid chamber 46 of the tool unit 40 to the liquid chamber 20 of the drive unit 10 via the connecting member 30.

Next, a circuit diagram of the hydraulic operating device will be described with reference to fig. 3. As shown in fig. 3, the tool operation switch 52 is connected to the relay 72 and the 1 st connector 74 of the switching unit 70 via the 2 nd connector 78, and is also connected to the solenoid 82 of the return operation unit 80 via the 1 st connector 74. When the tool operating switch 52 is pressed by the operator, an operating signal is sent to the solenoid 82 of the return operation unit 80 by the relay 72 of the switching unit 70, and the solenoid 82 is operated. Thereby, the urging member 84 is attracted toward the solenoid 82 side, the urging member 84 moves in the right direction in fig. 4, the spool 26 is pushed into the interior of the drive unit 10 by the urging member 84, and therefore, the return liquid is returned from the liquid chamber 46 of the tool unit 40 to the liquid chamber 20 of the drive unit 10 via the connecting member 30.

The pressure fluid generating unit operating switch 54 is connected to the relay 72 of the switching unit 70 via the 2 nd connector 78, and the relay 72 is connected to the battery adapter 64. The battery adapter 64 is connected to the battery 62 and also to the motor 14. When the pressure fluid generation unit operation switch 54 is pressed by the operator, the relay 72 of the switching unit 70 connects the path for transmitting the electric power from the battery 62 to the motor 14, and the electric power is supplied from the battery 62 to the motor 14. Specifically, the relay 72 of the switching unit 70 communicates with a path for transmitting electric power from the battery 62 to the motor 14 via the battery adapter 64, the 3 rd electric wire 66, and the mounting case 68. When electric power is supplied to the motor 14, the rotating member 16 rotates, the pressure fluid generating unit 17 generates pressure fluid, and the generated pressure fluid is supplied to the tool 41 of the tool unit 40 via the connecting member 30.

Next, the operation of the hydraulic working apparatus according to the present embodiment will be described.

When the hydraulic work apparatus according to the present embodiment is used to pry open a gap between objects such as doors in a building at an accident site, an operator first carries the hydraulic work apparatus to the site. When the work site is narrow, the operator grips the tool unit 40 of the hydraulic work apparatus and the distal end portion of the connecting member 30 and places the tool 41 of the tool unit 40 on the work site. In this case, the drive unit 10 and the tool unit 40 may be largely separated from each other, and even in such a case, the hydraulic work apparatus according to the present embodiment can be operated by one worker.

More specifically, the operator inserts the tool 41 (specifically, the flange member 45 and the base member 44) into the gap between the objects, and presses the pressure liquid generating unit operating switch 54 of the switch unit 50. When the pressure fluid generating unit operating switch 54 is pressed by the operator, the relay 72 of the switching unit 70 communicates with the path for transmitting the electric power from the battery 62 to the motor 14 via the battery adapter 64, the 3 rd electric wire 66, and the mounting case 68 as described above. Thereby, electric power is supplied from the battery 62 to the motor 14. Then, the motor 14 rotates the rotary member 16, and the pressure liquid generating unit 17 generates pressure liquid, and the generated pressure liquid is supplied to the tool 41 of the tool unit 40 via the connection member 30. Then, when the pressure liquid is supplied to the tool 41 (specifically, the liquid chamber 46), the piston 43 is moved relative to the cylinder 42 in the downward direction in fig. 2 by the pressure liquid. This increases the distance between the flange member 45 attached to the upper end of the cylinder 42 and the base member 44, and thus, the gap between the object such as a door in a building at an accident site can be pried open. When the operator moves his hand away from the pressure liquid generating unit operating switch 54, no power is supplied to the motor 14, and therefore the rotary member 16 is stopped and no pressure liquid is generated by the pressure liquid generating unit 17. Therefore, the pressure liquid is not further supplied to the liquid chamber 46 of the tool 41, and therefore, the piston 43 is stopped.

When the work of prying the gap of the object is completed, the worker takes out the tool unit 40 of the hydraulic work apparatus from the gap of the object and presses the tool actuation switch 52 of the switch unit 50. When the tool operating switch 52 is pressed by the operator, the relay 72 of the switching unit 70 operates the solenoid 82 of the return operation unit 80. Thereby, the urging member 84 is attracted toward the solenoid 82 side, the urging member 84 moves in the right direction in fig. 4, the spool 26 is pushed into the interior of the drive unit 10 by the urging member 84, and therefore, the return liquid is returned from the liquid chamber 46 of the tool unit 40 to the liquid chamber 20 of the drive unit 10 via the connecting member 30. Then, a force in a direction to store the piston 43 in the cylinder 42 is applied to the piston 43 by a force of the spring 48 provided in the cylinder 42 to return from the extended state to the original state. The force to be contracted by the spring 48 applies a force to move the piston 43 in the upward direction in fig. 2 toward the inside of the cylinder 42. In this way, the piston 43 is accommodated in the cylinder 42, and the tool unit 40 returns to the initial state shown in fig. 1.

The structure of the conventional hydraulic working apparatus will be described with reference to fig. 5 and 6. Fig. 5 is a configuration diagram showing a configuration of a conventional hydraulic work apparatus, and fig. 6 is a configuration diagram showing a state in which a tip tool of the hydraulic work apparatus shown in fig. 5 is operated. In the description of the configuration of the conventional hydraulic working apparatus shown in fig. 5 and 6, the same components as those of the hydraulic working apparatus of the present embodiment shown in fig. 1 to 4 are denoted by the same reference numerals, and the description thereof is omitted.

In the conventional hydraulic working apparatus shown in fig. 5 and 6, in comparison with the hydraulic working apparatus of the present embodiment shown in fig. 1 to 4, the battery 62a itself is detachably attached to the attached portion 13 of the drive unit 10, instead of the attachment case 68 to which the battery unit 60 is attached. The battery 62a has substantially the same structure as the battery 62 of the battery unit 60. The tool unit 40 is not provided with the switch unit 50. The return operation unit 80 is not attached to the drive unit 10, and instead, an operation lever 90 is provided to the drive unit 10. When the operator who grips the grip portion 12 of the drive unit 10 operates the operation lever 90, the slide valve 26 is pushed into the interior of the drive unit 10, and the return fluid returns from the fluid chamber 46 of the tool unit 40 to the fluid chamber 20 of the drive unit 10 via the connecting member 30.

The operation of such a conventional hydraulic working apparatus will be described.

When a gap between objects such as doors in a building at an accident site is pried open by a conventional hydraulic working apparatus, an operator first carries the hydraulic working apparatus to the site. Specifically, when the site where work is performed on site is narrow, the 1 st operator grips the tool unit 40 of the hydraulic work apparatus and the distal end portion of the connecting member 30, and places the tool 41 of the tool unit 40 on the work site. In this case, the drive unit 10 and the tool unit 40 may be largely separated from each other, and two workers need to operate the hydraulic working apparatus.

Specifically, the 1 st operator inserts the tool 41 (specifically, the flange member 45 and the base member 44) into the gap between the objects. When the 2 nd operator gripping the grip portion 12 of the drive unit 10 presses the drive switch 28 after the 1 st operator inserts the tool 41 into the gap between the objects, electric power is supplied from the battery 62a to the motor 14. Thereby, the pressure liquid generating unit 17 generates pressure liquid, and the generated pressure liquid is supplied to the tool 41 of the tool unit 40 via the connecting member 30. Then, when the pressure liquid is supplied to the tool 41 (specifically, the liquid chamber 46), the piston 43 is moved relative to the cylinder 42 in the downward direction in fig. 6 by the pressure liquid. This increases the distance between the flange member 45 attached to the upper end of the cylinder 42 and the base member 44, and thus, the gap between the object such as a door in a building at an accident site can be pried open. When the 2 nd operator moves his hand away from the drive switch 28, no power is supplied to the motor 14, and therefore the rotary member 16 is stopped and no pressure fluid is generated by the pressure fluid generating unit 17. Therefore, the pressure liquid is not further supplied to the liquid chamber 46 of the tool 41, and therefore, the piston 43 is stopped. In this case, when the 1 st operator who inserts the tool 41 of the tool unit 40 into the gap between the objects and the 2 nd operator who operates the driving unit 10 are separated from each other, there is a possibility that the two operators cannot communicate with each other well and the operation of prying the gap between the objects cannot be performed smoothly.

When the work of prying the gap of the object is completed, the 1 st operator takes out the tool unit 40 of the hydraulic working apparatus from the gap of the object. And, after the 1 st operator takes out the tool unit 40 of the hydraulic working apparatus from the gap of the object, the 2 nd operator operates the operation lever 90 of the driving unit 10. Thereby, the spool 26 is pushed into the interior of the drive unit 10, and therefore, the return liquid is returned from the liquid chamber 46 of the tool unit 40 to the liquid chamber 20 of the drive unit 10 via the connecting member 30. Then, a force in a direction to store the piston 43 in the cylinder 42 is applied to the piston 43 by a force of the spring 48 provided in the cylinder 42 to return from the extended state to the original state. The force of the spring 48 tending to contract applies a force to move the piston 43 in the upward direction in fig. 6 toward the inside of the cylinder 42. In this way, the piston 43 is accommodated in the cylinder 42, and the tool unit 40 returns to the initial state shown in fig. 5.

As described above, the conventional hydraulic working apparatus has the following problems: since two workers are required to perform the operation, if the person who operates the tool 41 of the tool unit 40 and the person who operates the drive unit 10 do not communicate with each other smoothly, there is a possibility that the work cannot be performed properly.

In contrast, according to the hydraulic working apparatus of the present embodiment, the drive unit 10 having the pressure fluid generating portion 17 that generates the pressure fluid and the tool unit 40 having the tool 41 that is operated by the pressure fluid are connected by the flexible connecting member 30. The tool unit 40 has a switch unit 50, and the switch unit 50 has a tool operation switch 52 and a pressure fluid generating unit operation switch 54. When the pressure fluid generating unit operating switch 54 is operated, electric power is supplied from the battery 62 to the motor 14, the pressure fluid generating unit 17 generates pressure fluid, and the generated pressure fluid is supplied to the tool unit 40 by the connecting member 30, so that the tool 41 operates. On the other hand, when the tool operation switch 52 is operated, the return operation unit 80 operates to return the return liquid from the tool 41 to the drive unit 10 via the connecting member 30, and thus the tool 41 returns to the initial state. In this way, since the tool 41 can be operated by the switch unit 50 of the tool unit 40, the tool 41 can be operated by even one operator, and operability can be improved. Accordingly, when the work site is narrow and it is necessary to perform work with the drive unit 10 and the tool unit 40 separated from each other, even one worker can operate the tool 41, and thus the operability can be improved.

In the present embodiment, the conventional hydraulic working apparatus as shown in fig. 5 and 6 can be configured as the hydraulic working apparatus of the present embodiment as shown in fig. 1 to 4 by simply attaching the switch unit 50 to the tool unit 40, detaching the operation lever 90 from the drive unit 10, attaching the return operation unit 80 to the drive unit 10, detaching the battery 62a from the attached portion 13, and attaching the attachment case 68 of the battery unit 60. In this way, the hydraulic working apparatus according to the present embodiment can be provided by only slightly modifying the existing hydraulic working apparatus, and therefore, the cost for realizing the hydraulic working apparatus according to the present embodiment can be reduced.

In the present embodiment, the battery 62 is not directly attached to the attached portion 13 of the drive unit 10, but the attachment case 68 of the battery unit 60 is attached. In this case, for example, when carrying the drive unit 10 of the hydraulic working apparatus to the site while housing it in a dust-proof device, the battery 62 and a part of the 3 rd electric wire 66 of the battery unit 60 are taken out of the dust-proof device, so that even when the battery 62 is exhausted, the battery 62 can be replaced without taking out the drive unit 10 from the dust-proof device to the outside, and therefore, the operability for the operator can be further improved.

The hydraulic operating device according to the present embodiment is not limited to the above-described embodiment, and various modifications may be made.

For example, in the hydraulic working apparatus of the present embodiment as shown in fig. 1 to 4, the drive switch 28 may be omitted. Even if the drive unit 10 is not provided with the drive switch 28, the pressure fluid can be generated by the pressure fluid generating unit 17 and can be sent to the tool unit 40 through the connecting member 30 by operating the pressure fluid generating unit operating switch 54 of the switch unit 50.

In the hydraulic working apparatus described above, the switch unit 50 includes the tool operation switch 52 in the form of a push button and the pressure generating unit operation switch 54, but the hydraulic working apparatus according to the present embodiment is not limited to this configuration. In the hydraulic operating device according to the modified example, the switch unit may have 1 lever, and the tool operating switch may be operated when the operator tilts the lever in the 1 st direction, and the pressure fluid generating unit operating switch may be operated when the operator tilts the lever in the 2 nd direction opposite to the 1 st direction.

The tool 41 of the tool unit 40 is not limited to the one constituted by the cylinder 42 and the piston 43 as shown in fig. 1 and the like. In the hydraulic power tool according to the modification, a tool having a cutter for cutting a reinforcing bar or the like, or a tool having a spreader having 4 functions of cutting, spreading, crushing, and pulling may be used as the tool. Even in this case, the tool is operated by supplying the pressure liquid to the tool.

The switch 70 is not limited to being attached to the mounting case 68. The switching portion 70 may be mounted to, for example, the drive unit 10, instead of the mounting case 68.

In the hydraulic operating device of the present embodiment, the battery unit is not limited to the battery unit having the battery 62, the battery adapter 64, the 3 rd electric wire 66, and the mounting case 68 as shown in fig. 1 and 2. The battery unit may include only the battery 62, and the battery 62 may be detachably attached to the attached portion 13 of the drive unit 10. Even in this case, the switching unit 70 may be mounted on the drive unit 10, for example.

Further, instead of the tool operation switch 52 and the pressure fluid generating unit operation switch 54 in the form of buttons being connected to the switching unit 70 by the 2 nd electric wire 56, when the tool operation switch 52 or the pressure fluid generating unit operation switch 54 is operated, a signal may be wirelessly transmitted to the relay 72 of the switching unit 70 to perform the switching operation by the relay 72. Further, the return operation unit 80 may be configured to wirelessly transmit the operation signal from the relay 72 to the solenoid 82, instead of being connected to the switching unit 70 by the 1 st electric wire 76.

Claims

1. A hydraulic working apparatus, wherein,

the hydraulic working device is provided with:

a drive unit having a motor and a pressure liquid generating portion that generates pressure liquid by rotating a rotating member by the motor;

a tool unit having: a tool that operates using pressure fluid; and a switch unit having a pressure fluid generating unit operation switch and a tool operation switch;

a flexible connecting member that connects the tool unit and the driving unit, supplies the pressure fluid generated by the pressure fluid generating unit to the tool, and returns the return fluid from the tool to the pressure fluid generating unit;

2. The hydraulic working apparatus according to claim 1,

the hydraulic working device is further provided with a switching part,

the return operation part is connected with the switching part through a 1 st electric wire,

the pressure fluid generating part operating switch and the tool operating switch of the switch part are connected to the switching part by 2 nd electric wires,

when the pressure fluid generation unit operation switch is operated, the switching unit connects a path for transmitting electric power from the battery to the motor to supply electric power from the battery to the motor,

when the tool operation switch is operated, the switching unit transmits an operation signal to the return operation unit, and the return operation unit operates.

3. The hydraulic working apparatus according to claim 2,

the battery unit further has: a battery adapter to which the battery is detachably attached; and a case for assembly connected to the battery adapter by a 3 rd electric wire,

the battery adapter and the mounting case are respectively attachable to the drive unit,

when the pressure fluid generating unit operating switch is operated in a state where the assembly case is mounted to the drive unit, the switching unit communicates a path for transmitting power from the battery to the motor via the battery adapter, the 3 rd electric wire, and the assembly case, and the power is supplied from the battery to the motor.

4. The hydraulic working apparatus according to claim 3,

the battery and the mounting case may be mounted to the same portion of the drive unit.

5. The hydraulic working apparatus according to any one of claims 1 to 4,

the switch unit is detachably attached to the tool.

6. The hydraulic working apparatus according to any one of claims 1 to 5,

the drive unit is provided with a spool, the pressure fluid generated by the pressure fluid generating unit is supplied to the connecting member in a state where the spool is not pushed into the drive unit, and when the spool is pushed into the drive unit, a fluid path for supplying the pressure fluid generated by the pressure fluid generating unit to the connecting member is blocked by the spool, and a return fluid is returned from the tool to the drive unit via the connecting member.

7. The hydraulic working apparatus according to claim 6,

the return operation unit includes a pushing member that pushes the spool, and when the tool operation switch is operated, the pushing member moves, and the spool is pushed into the drive unit by the pushing member.

8. The hydraulic working apparatus according to claim 7,

the return operation unit further includes a solenoid that moves the pushing member when the tool operation switch is operated.