JP3517277B2 - Hydraulic unit with cylinder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator, and more particularly to a hydraulic unit with a cylinder for use in a cargo handling vehicle.

[0002]

2. Description of the Related Art Generally, in a cargo handling vehicle as shown in FIG.
Piston rods 61A, 61 of the cylinders 60A, 60B
The front end of B is rotatably attached to the wings 62A and 62B, and the cylinder bodies 63A and 63B are attached to the vehicle body 64.
Rotatably attached to the cylinders 60A, 60B
Is the piston rod 61A, 61
As B advances and retreats, the wing 62A, 62B is provided so as to be openable and closable by pivoting around a mounting portion to the vehicle body 64. A hydraulic unit for supplying and discharging the hydraulic oil to and from the cylinders 60A and 60B is conventionally the one disclosed in Japanese Utility Model Laid-Open No. 4-4501. The hydraulic unit is mounted on a chassis body (not shown) below the floor 65. Has been
It is provided in communication with the cylinders 60A and 60B by piping.

[0003]

However, the cylinder 6
0A, 60B is the vehicle body 64 due to the supply and discharge of hydraulic oil.
Cylinders 60A, 6
0B and the hydraulic unit must be connected by a pipe that is flexible according to the rotation of the cylinders 60A and 60B, which is a troublesome piping work. The present invention solves such a problem, and provides a hydraulic unit with a cylinder in which a cylinder is rotatably attached to a hydraulic unit so that piping work can be extremely simplified.

[0004]

For this reason, it is described in claim 1.
In the invention described above, an oil tank for storing hydraulic oil and an oil tank
An electric motor provided on one side surface, and a hydraulic pump that is rotationally driven by the electric motor to suck and discharge the hydraulic fluid stored in the oil tank,
A hydraulic unit equipped with a hydraulic control valve for controlling hydraulic oil and a piston are slidably inserted in the cylinder body in the axial direction, and a piston rod fixed to the piston is projected outside from one end of the cylinder body. provided compartments formed in the cylinder body to the head chamber and the rod chamber, and a two cylinders provided retractably the piston rod or cylinder body by supply and discharge of hydraulic oil to the head chamber and rod chamber, hydraulic Unit faces one side with electric motor
Provide a block member on the other side, and the block member
Both sides are provided in a straddle-shaped part having a recess, and the head chamber side end of the cylinder body of each cylinder or the tip protruding outside the piston rod is inserted into each recess of the block member.
Each of them is packed, and before the direction orthogonal to this packing direction
The head chamber end or the tip and block member
A shaft member is rotatably inserted between the straddle-shaped portion and each cylinder is used by each shaft member to form a hydraulic unit block member.
The provided pivotally mounted, hydraulic oil under a hydraulic Yunitsuto and the respective cylindrical <br/> Da within each shaft member is formed in communication with the flow path flows. Further, in the invention described in claim 2,
An oil tank that stores hydraulic oil, an electric motor, and a
Hydraulic pressure that is driven to inhale and discharge the stored hydraulic oil in the oil tank
Hydraulic with pump and hydraulic control valve to control hydraulic fluid
Unit and piston slide axially in cylinder body
Piston rod that is freely inserted and installed and fixed to the piston
Project from the one end of the cylinder body to the outside
The body is divided into a head room and a rod room, and
Piston by supplying and discharging hydraulic oil to and from the rod chamber and rod chamber
A cylinder with a rod or cylinder that can move forward and backward
And the head chamber end of the cylinder body of the cylinder.
Alternatively, hydraulic pressure is applied to the tip protruding outside the piston rod.
It is installed by rotatably attached to the unit by a shaft member, and
The hydraulic oil that has the pressure unit and the cylinder inside the shaft member
Hydraulic control that controls hydraulic oil by communicating with the communicating flow path
A part of the valve is provided inside the shaft member.

[0005]

According to the invention described in claim 1, each cylinder is rotated about each shaft member for attaching to the hydraulic unit while the piston rod or the cylinder body is advanced and retracted by supplying and discharging the hydraulic oil from the hydraulic unit, distribution of the hydraulic oil between the hydraulic Yunitsuto and each cylinder is via the shaft member inside the flow path. Therefore, the flow path inside the shaft member does not have to be a flexible pipe as in the conventional case, so that the piping work can be extremely simplified. In addition, claim 2
In the invention described in (1), the hydraulic oil is supplied from the hydraulic unit.
Cylinder may be connected to piston rod or cylinder
A shaft for attaching to the hydraulic unit while the main body moves back and forth
Rotation around the member to operate between hydraulic unit and cylinder
The oil is circulated through the flow path inside the shaft member. others
Therefore, the flow path inside the shaft member is flexible piping as in the past.
Since it is unnecessary, piping work can be made extremely easy.
Wear.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, 1 is a hydraulic unit,
An oil tank 2 having a substantially square shape capable of storing hydraulic oil therein, an electric motor 4 projecting from one side surface of the oil tank 2 via a connecting plate 3, and an oil tank 2 rotatably driven by the electric motor 4
The hydraulic pump 5 disposed inside the oil tank 2 by drivingly connecting with the electric motor 4 inside the connecting plate 3 so as to suck and discharge the stored operating oil, and the operation as the hydraulic control valve mounted on the manifold 6 on the oil tank 2. Electromagnetic direction switching valves 7A, 7B for switching control of the flow direction of oil, a relief valve 8 provided on the connecting plate 3 for setting the discharge pressure of the hydraulic oil discharged from the hydraulic pump 5, and further, of the oil tank 2 are provided. A block member 9, which will be described in detail later, is provided so as to be connected to the other side surface facing the one side surface on which the electric motor 4 is provided.

11A and 11B are wings 62 shown in FIG.
Cylinders for opening and closing A and 62B. Both end openings of cylindrical cylinder tubes 12A and 12B are closed by head side lid members 13A and 13B and rod side lid members 14A, ... Configure and
Pistons 16A and 16B are provided so as to be slidable in the axial direction inside the cylinder bodies 15A and 15B.
Piston rods 17A and 17B are fixedly attached to 6A and 16B, and the inside of the cylinder main bodies 15A and 15B are head chambers 18A and
18B and the rod chambers 19A and 19B are partitioned and formed. The piston rods 17A, 17B are oil-tightly penetrated through the rod-side lid members 14A, ... And protruded to the outside, and the protruding tips are rotatably attached to the wings 62A, 62B shown in FIG.

Projections 20A and 20B are formed on the head side cover members 13A and 13B of the cylinders 11A and 11B.
The block member 9 of the hydraulic unit 1 has convex portions 2 on both sides thereof.
The recesses 10A and 10B for accommodating 0A and 20B are formed in a straddle shape. Reference numerals 21A and 21B denote shaft members, which are rotatably inserted between the convex portions 20A and 20B and the straddle-shaped portion of the block member 9 in a direction orthogonal to the packing direction of the convex portions 20A and 20B into the concave portions 10A and 10B. , Cylinder 1
1A and 11B are rotatably attached to the hydraulic unit 1. Fixed pipes 22A and 22B connected to the rod chambers 19A and 19B of the cylinders 11A and 11B are fixedly provided on one end surfaces of the shaft members 21A and 21B in the axial direction, whereby the shaft members 21A and 21B are integrated with the cylinders 11A and 11B. Turn to. 36A, 36B, 37A, ... Are shaft members 21A,
The shaft member 2 is a circlip that acts to prevent the 21B from coming off.
They are provided at both axial ends of 1A and 21B, respectively.

Channels 23A and 23B connecting to the head chambers 18A and 18B are formed in the head side cover members 13A and 13B of the cylinders 11A and 11B, and the channels 23A and 23B are formed.
Are provided with one-way control valves 24A, 24B for controlling the discharge of the hydraulic oil from the head chambers 18A, 18B by freely supplying the hydraulic oil to the head chambers 18A, 18B. The cylinders 11A and 11B are head chambers 18A and 18B.
The piston rods 17A and 17B are provided so as to be movable back and forth by supplying and discharging the hydraulic oil to and from the rod chambers 19A and 19B. Reference numerals 25A, ..., 26A, ... are flow passages through which the hydraulic oil is provided, which are provided inside the shaft members 21A, 21B.
A communicates with the fixed pipes 22A and 22B and the flow passages 27A and 27B formed inside the block member 9, and the flow passage 26
A is a flow path 23 inside the head side lid members 13A, 13B.
A and 23B and the flow path 28 formed inside the block member 9
A and 28B are provided in communication with each other. The flow passages 27A and 28A inside the block member 9 communicate with the electromagnetic directional control valve 7A via the flow passages 29A and 30A inside the block member 9, respectively.
It is provided so as to communicate with the electromagnetic directional control valve 7B via B and 30B.

Reference numeral 31A is a pilot operation check valve as a hydraulic control valve which is provided inside the block member 9, and which has a flow path 27.
A, 28A and the flow channels 29A, 30A are arranged,
The pilot piston 3 includes a valve body 32A that allows the flow of hydraulic oil from A to the flow passage 27A to be a free flow and a valve body 33A that allows free flow of hydraulic fluid from the flow passage 30A to the flow passage 28A.
The valve elements 32A and 33A are arranged so as to face each other with the piston piston 34A pressed so as to allow a reverse flow of free flow. Similarly, a pilot operation check valve 31B is disposed between the flow paths 27B and 28B and the flow paths 29B and 30B inside the block member 9, and the pilot operation check valve 31B has valve bodies 32B and 33B. It has the same function as the operation check valve 31A. Three
5A and 35B are mounting holes of the hydraulic unit 1, which are provided by inserting bolt members (not shown) and mounting between the wings 62A and 62B of the vehicle body 64 shown in FIG.

Next, the operation of this structure will be described. The illustrated state shows that the cylinders 11A and 11B in which the piston rods 17A and 17B are located at the retracted ends are in a deactivated state, the electromagnetic directional control valves 7A and 7B are located in the neutral position, and the hydraulic pump 5 is stopped.

From this state, when the hydraulic pump 5 is rotationally driven by the electric motor 4 and the electromagnetic directional switching valve 7A is switched from the neutral position to the left side position in FIG. 2, the hydraulic oil discharged from the hydraulic pump 5 is electromagnetic directional switching valve. 7A, flow passage 30A, valve element 33A of pilot operation check valve 31A, flow passage 28A,
Flow path 26A of shaft member 21A, flow path 23 of cylinder 11A
A is circulated, and the one-way throttle valve 24A is circulated as a free flow to be supplied to the head chamber 18A. In the cylinder 11A, the hydraulic oil supplied to the head chamber 18A acts on the piston 16A, and the piston rod 17A moves forward together with the piston 16A.
It rotates about 1A in the upward direction of FIG. The hydraulic oil discharged from the rod chamber 19A as the piston 16A moves forward is supplied from the fixed pipe 22A to the flow path 25 of the shaft member 21A.
A, the flow path 27A, the valve element 32 pressed by the pilot piston 34A of the pilot operation check valve 31A.
A, flowing through the flow path 29A to reach the electromagnetic directional control valve 7A,
The oil is returned to the oil tank 2 from the electromagnetic direction switching valve 7A.

When the piston rod 17A advances to the forward end and the rotation of the cylinder 11A reaches the upper end, the electromagnetic directional control valve 7A is returned from the left side position to the neutral position. As a result, the flow paths 29A and 30A are switched and communicated with the oil tank 2 by the electromagnetic direction switching valve 7A, and the working oil in the head chamber 18A and the rod chamber 19A flows by the valve body 33A and the valve body 32A of the pilot operation check valve 31A. Road 3
0A and the flow path 29A are prevented from being discharged, and the cylinder 1
1A is held at the upper end rotational position where the piston rod 17A is located at the forward end.

From this state, when the electromagnetic directional control valve 7A is switched from the neutral position to the right side position in FIG. 2, the hydraulic oil discharged from the hydraulic pump 5 is passed through the electromagnetic directional control valve 7A to the flow path 2
9A, valve body 32A of pilot operation check valve 31A, flow passage 27A, flow passage 25A of shaft member 21A, fixed pipe 22A
Is supplied to the rod chamber 19A. Cylinder 11
A indicates that the hydraulic oil supplied to the rod chamber 19A is the piston 16
Acting on A, the piston rod 17A retracts together with the piston 16 and the entire body including the cylinder body 15A rotates downward about the shaft member 21A toward the position shown in FIG. 1 (A). Head chamber 1 as piston 16A retracts
The hydraulic oil discharged from 8A is throttle-controlled by the one-way throttle valve 24A (which reduces the backward speed of the piston 16A), the flow passage 23A, the flow passage 26A of the shaft member 21A, the flow passage 28A, and the reverse pilot operation. It flows through the valve body 33A pressed by the pilot piston 34A of the stop valve 31A and the flow path 30A to reach the electromagnetic direction switching valve 7A, and is returned to the oil tank 2 from the electromagnetic direction switching valve 7A. When the piston rod 17A is retracted to the retracted end and the cylinder 11A is rotated to the downward end, the electromagnetic directional control valve 7A is returned from the right side position to the neutral position.

When the electromagnetic directional control valve 7B is switched from the neutral position to the left position in FIG. 2, the piston rod 17B of the cylinder 11B moves forward together with the piston 16B, and the shaft member 21B is centered in the upward direction of FIG. 1 (A). When the piston rod 17B is advanced to the forward end and the cylinder 11B is rotated to the upper end, the electromagnetic directional control valve 7B is returned from the left side position to the neutral position and the cylinder 1 is rotated.
When 1B is held at the upper end rotational position and the electromagnetic directional control valve 7B is switched from the neutral position to the right position in FIG. 2 from this state, the cylinder rod 11B is moved while the piston rod 17B moves backward together with the piston 16B. 1A, the cylinder 11B is rotated downward toward the position shown in FIG. 1A, and when the cylinder 11B is returned to the state shown in FIG. 1A, the electromagnetic directional control valve 7B is returned from the right side position to the neutral position. To do. Further, by switching the electromagnetic direction switching valves 7A and 7B together, the two cylinders 11A and 11B can be operated together.

The shaft members 21A, which move forward and backward with the piston rods 17A, 17B of the cylinders 11A, 11B,
21B, in the operation of rotating around 21B, the hydraulic unit 1
Of the hydraulic oil between the cylinder 11A and the cylinder 11B
Since it is performed through the flow paths 25A, ... 26A, ... Inside the 1A and 21B, it is not necessary to use flexible piping as in the conventional case, and the piping work can be extremely simplified and the flexibility The durability can be improved as compared with the case where piping is used. Both sides of the block member 9 of the hydraulic unit 1
Since the two cylinders 11A and 11B are rotatably attached by the shaft members 21A and 21B to the straddle-shaped portion , the hydraulic unit 1 and the two cylinders 11A and 11B are provided.
B can be integrally provided, and it can be made compact as compared with the conventional one in which the hydraulic unit and the cylinder are provided to communicate with each other by piping. Furthermore, before the installation in the cargo handling vehicle, it is possible to perform an adjustment operation that combines the hydraulic unit 1 and the cylinders 11A and 11B. As in the conventional case, the hydraulic unit and the cylinder are installed in the cargo handling vehicle, respectively. The adjustment operation can be easily performed as compared with the case in which the adjustment operation can be performed only after the pipes are connected to each other through the pipe.

3 and 4 show another embodiment of the present invention,
The same parts as those of the embodiment are designated by the same reference numerals and the description thereof will be omitted.
Only different points will be described. The pilot operation check valves 38A, 38B as hydraulic control valves corresponding to the pilot operation check valves 31A, 31B of one embodiment have cylinders 39A, 39B connected to the block member 9 of the hydraulic unit 1.
The shaft member 40A is rotatably attached to the shaft member 40A. The pilot operation check valve 38A is provided with a flow passage 41 through which the hydraulic oil flows, which is provided inside the shaft member 40A.
A, 42A and flow channels 43A, 44A are disposed between the flow channel 41 and
The pilot piston 4 includes a valve body 45A for freely flowing the hydraulic oil flow from A to the flow passage 43A and a valve body 46A for freely flowing the hydraulic oil flow from the flow passage 42A to the flow passage 44A.
The valve bodies 45A and 46A are arranged so as to face each other with the pilot piston 47A pressed against each other so as to allow a free flow in the opposite direction. Similarly, the flow path 41B,
A pilot operation check valve 38B is arranged between 42B and the flow paths 43B and 44B, and the pilot operation check valve 38B has valve bodies 45B and 46B and has a pilot operation check valve 38.
It has the same functions as A. The flow passages 41A and 42A are provided so as to communicate with the electromagnetic directional control valve 7A via the flow passages 48A and 49A formed in the block member 9, and the flow passages 41A and 42A are similarly provided.
B and 42B are provided so as to communicate with the electromagnetic directional control valve 7B via flow paths 48B and 49B.

The cylinders 39A, 39B are pivoted to the block member 9 of the hydraulic unit 1 by the shaft members 40A, ... with the tips of the cylinders 39A, 39B penetrating oil-tightly through the rod side cover members 59A, ... The front end portion of the head side lid member 52A, ..., Which is provided by freely attaching and constitutes the cylinder body 51A ,.
62B is rotatably attached. Piston rod 50A,
Pistons 53A and 53B having piston rods 50A and 50B fixed therein penetrate through head chamber 54A,
Flow paths 55A and 55B connected to 54B and a rod chamber 56
A channels 57A and 57B connected to A and 56B are bored,
One-way throttle valve 24 of one embodiment is provided in the flow paths 55A and 55B.
A one-way throttle valves 58A and 58B corresponding to A and 24B are provided, and the supply of hydraulic oil to the head chambers 54A and 54B is used as a free flow to restrict the discharge of hydraulic oil from the head chambers 54A and 54B. ing. And the flow paths 55A and 55B
Are provided in communication with the flow paths 44A, 44B of the shaft members 40A, ..., And the flow paths 57A, 57B are provided in communication with the flow paths 43A, 43B. The cylinders 39A and 39B are head chambers 54
The cylinder bodies 51A, ... Are provided so as to be movable back and forth by supplying and discharging hydraulic oil to and from A and 54B and the rod chambers 56A and 56B.

Since the cylinders 39A and 39B are similar in operation, only the operation of the cylinder 39A will be described. The hydraulic pump 5 is operated by switching the electromagnetic direction switching valve 7A.
When the hydraulic oil discharged from the flow passage 49A flows, the flow passage 49A
The hydraulic fluid A flows through the flow passage 42A of the shaft member 40A, the valve body 46A of the pilot operation check valve 38A, the flow passage 44A, and the flow passage 55A of the piston rod 50A, and the one-way throttle valve 5
8A in free flow and supplied to the head chamber 54A. In the cylinder 39A, the hydraulic oil supplied to the head chamber 54A acts on the head side lid member 52A, and the cylinder body 51
As A advances, the entire body including the piston rod 50A rotates in one direction around the shaft member 40A. The hydraulic oil discharged from the rod chamber 56A as the cylinder body 51A moves forward is the flow passage 57A of the hilton rod 50A, the flow passage 43A of the shaft member 40A, and the pilot operation check valve 38.
The oil tank 2 is circulated through the valve body 45A pressed by the pilot piston 47A of A, the flow passage 41A, and the flow passage 48A to reach the electromagnetic directional switching valve 7A.
Is returned to.

When the hydraulic oil discharged from the hydraulic pump 5 flows through the flow passage 48A by the switching operation of the electromagnetic directional control valve 7A, the hydraulic oil in the flow passage 48A flows into the flow passage 41 of the shaft member 40A.
A, the valve body 45A of the pilot operation check valve 38A, the flow passage 43A, and the flow passage 57A, and is supplied to the rod chamber 56A. In the cylinder 39A, the hydraulic oil supplied to the rod chamber 56A acts on the rod-side lid member 59A, so that the cylinder body 5
As 1A moves backward, the entire body including the piston rod 50A rotates about the shaft member 40A in the other direction opposite to the one direction described above. The hydraulic oil discharged from the head chamber 54A as the cylinder body 51A retracts is supplied to the one-way throttle valve 5
8A, flow passages 55A, flow passages 44A, and valve bodies 46A, flow passages 42A, and flow passages 49A pressed by the pilot piston 47A of the pilot operation check valve 38A.
Through the electromagnetic direction switching valve 7A, and is returned to the oil tank 2 from the electromagnetic direction switching valve 7A.

With this operation, in addition to the effect of the first embodiment, the pilot operation check valves 38A and 38B are connected to the shaft member 4.
Since it is provided inside 0A, ..., Further compactification can be achieved. Furthermore, the fixed pipe 22 of one embodiment
Since the flow passages 57A and 57B corresponding to A and 22B are provided inside the piston rods 50A and 50B, the pipes can be saved.

[0022]

According to the first aspect of the present invention, as in the conventional case,
It is not necessary to use a flexible pipe, the piping work can be extremely simplified, and durability can be improved as compared with the case where a flexible pipe is used. Further, since the provided rotatably attached to the respective shaft member two cylinder <br/> Da to straddle the shape of both side portions of the block member of the hydraulic Yunitsuto, the hydraulic Yunitsuto and two cylinders Since it can be integrally provided, it has an effect that it can be made compact as compared with the conventional one in which the hydraulic unit and the cylinder are provided to communicate with each other by piping. Further, claim 2
The one described in No. does not use flexible piping as in the past.
The piping work is extremely easy and flexible.
Improved durability compared to using flexible piping
You can Further, since a part of the hydraulic control valve is provided inside the shaft member, there is an effect that it can be made more compact.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (A) is a perspective view of a hydraulic unit with a cylinder, and (B) is an enlarged sectional view of essential parts.

FIG. 2 is a hydraulic circuit diagram of the hydraulic unit with a cylinder shown in FIG.

FIG. 3 is an enlarged sectional view of a main part of a hydraulic unit with a cylinder showing another embodiment of the present invention.

FIG. 4 is a hydraulic circuit diagram of another embodiment.

FIG. 5 is a schematic perspective view of a general cargo handling vehicle using the hydraulic unit with a cylinder of the present invention.

[Explanation of symbols]

1 hydraulic unit 2 oil tank 4 electric motor 5 hydraulic pump 7A, 7B electromagnetic directional control valve (hydraulic control valve) 11A, 11B, 39A, 39B cylinder 15A, 15B, 51A cylinder body 16A, 16B, 53A, 53B piston 17A, 17B, 50A, 50B Piston rod 18A, 18B, 54A, 54B Head chamber 19A, 19B, 56A, 56B Rod chamber 21A, 21B, 40A Shaft member 31A, 31B, 38A, 38B Pilot operated check valve (hydraulic control valve)

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI F15B 15/14 380 F15B 15/14 380D (56) References JP-A-6-249212 (JP, A) JP-A-5-149306 (JP, A) JP-A-4-189298 (JP, A) JP-A-48-64387 (JP, A) Actual opening 3-108321 (JP, U) Actual opening 1-148105 (JP, U) Actual Kai 63-150102 (JP, U) Actual Kai 48-100512 (JP, U) Actual Ko 48-27339 (JP, Y1) Actual Ko 48-9036 (JP, Y1) (58) Fields investigated (58) Int.Cl. ⁷ , DB name) B60J 7/08 F15B 1/00 F15B 15/00

Claims (2)

(57) [Claims] 1. An oil tank for storing hydraulic oil, and an oil tank
An electric motor provided on one side surface, and a hydraulic pump that is rotationally driven by the electric motor to suck and discharge the hydraulic fluid stored in the oil tank,
A hydraulic unit equipped with a hydraulic control valve for controlling hydraulic oil and a piston are slidably inserted in the cylinder body in the axial direction, and a piston rod fixed to the piston is projected outside from one end of the cylinder body. provided compartments formed in the cylinder body to the head chamber and the rod chamber, and a two cylinders provided retractably the piston rod or cylinder body by supply and discharge of hydraulic oil to the head chamber and rod chamber, hydraulic Unit faces one side with electric motor
Provide a block member on the other side, and the block member
Both sides are provided in a straddle-shaped part having a recess, and the head chamber side end of the cylinder body of each cylinder or the tip protruding outside the piston rod is inserted into each recess of the block member.
Each of them is packed, and before the direction orthogonal to this packing direction
The head chamber end or the tip and block member
A shaft member is rotatably inserted between the straddle-shaped portion and each cylinder is used by each shaft member to form a hydraulic unit block member.
Rotatably mounted to provided, hydraulic Yunitsuto the respective cylindrical <br/> da and the cylinder with hydraulic Yunitsuto comprising communicating by a flow path the working oil flows having inside each shaft member. 2. An oil tank for storing hydraulic oil, and an electric motor
And the hydraulic oil stored in the oil tank is rotated by an electric motor.
Hydraulic pump that sucks and discharges the oil, and hydraulic control that controls the hydraulic oil.
A hydraulic unit equipped with a control valve and a piston in the cylinder body.
The ton is slidably inserted in the axial direction and fixed to the piston.
Install the installed piston rod from one end of the cylinder body to the outside.
Projects and divides the cylinder body into a head chamber and a rod chamber
Formed and provided, supply of hydraulic oil to head chamber and rod chamber
Piston rod or cylinder body moves back and forth by discharging
Cylinder book of a cylinder that has a freely provided cylinder
Project outside the head chamber end of the body or outside the piston rod.
The protruding tip can be freely rotated by a shaft member in a hydraulic unit.
Installed and installed, the hydraulic unit and cylinder in the shaft member
Communicating the flow path having hydraulic fluid communicates with the part, Ru formed with a part of the hydraulic control valve for controlling the hydraulic fluid inside the shaft member
Shea Linda with hydraulic Yunitsuto.