JP2528869Y2 - hydraulic unit - Google Patents

Description

Description: TECHNICAL FIELD [Industrial application field] The present invention relates to a hydraulic unit used by being provided in an actuator provided with a hydraulic actuator.

[Conventional technology]

Conventionally, in this type of hydraulic unit, the configuration of the hydraulic unit used for the actuator, particularly the cargo handling vehicle, is as shown in FIGS. 5 to 7, and the tank 6 is placed on the upper plate portion 7 of the tank 6 for storing oil inside. An electric motor 9 for driving an immersive hydraulic pump 8 is erected inside, and pilot-operated check valves 11A and 11B as hydraulic control valves and a hydraulic actuator are mounted on a manifold 10 mounted and fixed on the upper plate portion 7. Switching valves 13A and 13B for switching and controlling the flow direction of oil are laminated and arranged. Then, an exterior cover 15 having an opening at the front is attached to the upper plate portion 7 of the tank 6 so as to cover the electric motor 9, the manifold 10, the pilot operation check valves 11A and 11B, and the switching valves 13A and 13B with a plurality of mounting bolts 16. The front opening of the exterior cover 15 is closed by the lid member 17, and the motor 9, the manifold 10, the pilot-operated check valve 11A, 11B, and the switching valve 13A, 1 are provided.
3B is protected from external dust. And
The hydraulic unit is mounted on the vehicle by attaching the four mounting portions 18 fixed to the upper surface of the exterior cover 15 to the mounting plate 14 welded and fixed to the frame portion 19 of the vehicle with bolt members 12.

[Problems that the device tries to solve]

However, an electric motor 9, a manifold 10, a pilot-operated check valve 11A, 11B, a switching valve 13A, 13B are provided on the upper plate portion 7, and a large load of a tank 6 for storing oil inside and immersing the hydraulic pump 8 is attached. Since it acts on the bolt 16, a large number of mounting bolts 16 must be provided or a large mounting bolt 16 must be provided so as to withstand a large load, and the mounting bolt 16 is used to attach the exterior cover 15 to the tank 6. There is a problem that it takes time and effort and it is troublesome to assemble the hydraulic unit.

The present invention solves such a problem, and provides a hydraulic unit that simplifies assembly by eliminating the need for mounting bolts for attaching the exterior cover to the tank.

[Means to solve problems]

Therefore, in the present invention, a tank is provided by sealing the inside so as to store oil inside, and this tank is erected from a substantially quadrilateral bottom plate portion, a back plate portion erected from the bottom plate portion, and a bottom plate portion. Then, the first side plate portion that is connected to the back plate portion in a substantially orthogonal direction, the second side plate portion that stands upright from the bottom plate portion and is opposed to the first side plate portion and is connected to the back plate portion in a substantially orthogonal direction, and the bottom plate portion. The front plate portion that stands upright and faces the back plate portion and is connected to the first side plate portion and the second side plate portion in a substantially orthogonal direction, and the back plate portion, the first side plate portion, and the second side plate portion that face the bottom plate portion. The electric motor and the flow of oil that drive the hydraulic pump that sucks and discharges the oil stored on the upper plate of the tank and is provided in a substantially square shape by forming the upper plate that is connected to the front plate in a substantially orthogonal direction. A hydraulic control valve to be controlled is placed, and the upper ends of the back plate portion, the first side plate portion, and the second side plate portion of the tank extend above the uppermost portions of the electric motor and the hydraulic control valve, respectively, to extend the electric motor and the hydraulic control valve. The exterior cover is formed to cover the exterior cover from three directions, and the front opening facing the back plate of the exterior cover and the upper opening located above the electric motor and the hydraulic control valve are closed by a removable lid member to provide the exterior. The cover is provided with a mounting portion for the operating device.

[Action]

In such a configuration, the exterior cover that covers the electric motor and the hydraulic control valve mounted on the upper plate of the tank from three directions is
Since the upper ends of the tank back plate, the first side plate, and the second side plate are formed so as to extend above the uppermost parts of the electric motor and the hydraulic control valve, respectively, the tank back plate and the first side plate are formed. The exterior cover can be formed by using the second side plate portion, and the assembly of the hydraulic unit can be simplified by eliminating the need for mounting bolts for attaching the exterior cover to the tank.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 to 4, 22 is a tank whose inside is sealed so as to store oil inside, and the quadrilateral bottom plate portion 20A.
The back plate portion 20B erected from the first side of the bottom plate portion 20A and the back plate portion 20B erected from the second side intersecting the first side of the bottom plate portion 20A in the orthogonal direction and connected to the back plate portion 20B in the orthogonal direction. 1 side plate and bottom plate 2
The third side facing the second side that intersects the first side of 0A in the orthogonal direction
Stand up from the side, stand up from the vicinity of the second side plate 20D facing the first side plate 20C and connected to the back plate 20B in the orthogonal direction, and the fourth side facing the first side of the bottom plate 20A. The front plate portion 21B which faces the back plate portion 20B and is connected to the first side plate portion 20C and the second side plate portion 20D in the orthogonal direction, and the back plate portion 20B and the first side plate portion 2 which face the bottom plate portion 20A.
It is composed of 0C, the second side plate portion 20D, the front plate portion 21B, and the upper plate portion 21A connected in the orthogonal direction, and is provided in a substantially square shape. Tank 22
The bottom plate portion 20A is composed of a single plate member, and is provided in a size slightly protruding to the right in FIG. 2 from the standing portion of the front plate portion 21B. The back plate portion 20B, the first side plate portion 20C, and the second side plate portion of the tank 22
The 20D is composed of a single bent plate member, and the first side plate portion 20C and the second side plate portion 20D are large enough to slightly protrude to the right in Fig. 2 from the front plate portion 21B standing position in the same manner as the bottom plate portion 20A. Provided in the direction
It is provided by welding and fixing to the bottom plate portion 20A. The upper plate portion 21A and the front plate portion 21B of the tank 22 are composed of a single plate member formed by bending, and the entire circumference is covered by the bottom plate portion 20A, the back plate portion 20B, the first side plate portion 20C, and the second side plate portion 20D. It is provided by welding and fixing. Reference numeral 23 denotes a hydraulic pump, which is provided so as to be immersed in the tank 22 through a through hole 21C formed in the upper plate portion 21A, and the stored oil is sucked and discharged into the tank 22 by driving. Reference numeral 24 denotes a spacer member, which is placed and fixed on the upper plate portion 21A, and the tank 22 is provided on the lower surface of FIG.
An immersive hydraulic pump 23 is fixed inside. Reference numeral 25 denotes an electric motor for driving the hydraulic pump 23, which is erected on the upper surface of FIG. 1 of the spacer member 24 mounted and fixed on the upper plate portion 21A, and the spacer member 24 is installed.
It is internally driven and connected to the hydraulic pump 23. Reference numeral 26 denotes a relief valve, which is provided so as to immerse itself in the spacer member 24 and project its head from the spacer member 24 to set the discharge pressure of the oil discharged from the hydraulic pump 23. Reference numeral 27 denotes a manifold member, which is connected to the spacer member 24 and mounted and fixed on the upper plate portion 21A to switch the oil flow direction between the pilot-operated check valves 28A and 28B as hydraulic control valves on the upper surface of FIG. Switching valves 29A and 29B for electromagnetic operation to be controlled are laminated and arranged. The hydraulic pump 23, the relief valve 26, the pilot-operated check valves 28A and 28B, and the switching valves 29A and 29B are connected to each other via an internal flow path (not shown) of the spacer member 24 and the manifold member 27. The circuit configuration is similar to that of the hydraulic circuit shown in FIG. 6, and the flow direction of oil to the hydraulic actuator (not shown) is switched and controlled by operating the switching valves 29A and 29B. Reference numeral 30 denotes a joint member for connecting the above-mentioned hydraulic actuator and the manifold member 27 by piping, and four (three are not shown) are provided so as to penetrate the back plate portion 20B from the manifold member 27 and project to the outside.
31 is the exterior cover, the back plate part 20B of the tank 22 and the first side plate part 2
A spacer provided on the upper plate portion 21A by extending the upper ends of 0C and the second side plate portion 20D beyond the upper plate portion 21A and extending above the uppermost portions of the motor 25 and the switching valves 29A and 29B, respectively. The member 24, the electric motor 25, the manifold member 27, the pilot-operated check valves 28A and 28B, and the switching valves 29A and 29B are covered from three directions. And the exterior cover 31 is the back plate 20
Front part in the direction of Fig. 2 facing B, electric motor 25, switching valve 2
An opening is formed in the upper portion of 9A and 29B located above the uppermost portion in FIG. Reference numeral 32 denotes a lid member, which has an upper plate portion 32A that closes the upper opening of the exterior cover 31 and a front plate portion 32B that hangs down from the upper plate portion 32A to reach the bottom plate portion 20A and closes the front opening of the exterior cover 31. , The front plate portion 32B is inserted through the two screw hole members 33A and 33B provided fixed to the bottom plate portion 20A, and the two screw members 34
A and 34B are screwed together so that they can be attached and detached so as to close the front opening and the upper opening of the exterior cover 31. Then, the spacer member 24 and the electric motor 2 are formed by the exterior cover 31 and the lid member 32.
5, Manifold member 27, Pilot operated check valve 28A,
28B and switching valves 29A and 29B are protected from external dust. Further, the lid member 32 is provided with a back plate portion 20B forming an exterior cover 31, a first side plate portion 20C, and a jaw portion 32C that engages with the second side plate portion 20D on the upper portion 32A, and the front plate portion 32B is provided with the first side plate. A jaw portion 32D that engages the portion 20C and the second side plate portion 20D is provided so as to prevent misalignment satisfactorily. Reference numeral 35 denotes a mounting portion to the operating device. Two of each are provided on the first side plate portion 20C and the second side plate portion 20D forming the exterior cover 31, and are welded and fixed to the frame portion 36 of the operating device, respectively. Two bolt members 38 are attached to each of the four mounting plates 37 that hang down so as to correspond to the above. As a result, the hydraulic unit is mounted on the actuator. 39 is a drain plug for draining the oil stored in the tank 22.

Next, the operation of such a configuration will be described.

When the hydraulic actuators are connected to each pipe by the joint member 30 and the hydraulic pump 23 is driven by the electric motor 25, the hydraulic pump 23 sucks and discharges the stored oil into the tank 22, and the oil discharged from the hydraulic pump 23 is the switching valve 29A, The oil flow direction is switched and controlled by the operation of 29B and introduced into the hydraulic actuator, the return oil from the hydraulic actuator is circulated to the tank 22, and the hydraulic actuator operates.

With this operation, the upper ends of the back plate portion 20B, the first side plate portion 20C, and the second side plate portion 20D constituting the tank 22 for storing oil exceed the upper plate portion 21A, respectively, and the electric motor 25 and the switching valves 29A and 29B.
Spacer member 24, electric motor 25, manifold member 27, which are provided so as to extend above the top of the top plate and are provided on the upper plate 21A.
Since the exterior cover 31 that covers the pilot-operated check valves 28A and 28B and the switching valves 29A and 29B is configured, the back plate portion 20B, the first side plate portion 20C, and the second side plate portion 20D that form the tank 22 are used. The exterior cover 31 can be formed, and the assembly of the hydraulic unit can be simplified by eliminating the need for mounting bolts for attaching the exterior cover to the tank. Further, the first side plate portion 20C and the second side plate portion 20D forming the exterior cover 31 are attached to the operating device.
Since 35 is provided to open the front part and the upper part of the exterior cover 31, the upper opening portion does not impair the mountability to the operating device as compared with the conventional hydraulic unit in which only the front part of the exterior cover is opened. Only the large opening can be obtained, and the pilot-operated check valves 28A and 28B and the switching valve 29 mounted on the upper plate 21A
Maintenance and inspection work such as replacing and inspecting A and 29B can be easily performed from the outside through the opening.

In one embodiment, the hydraulic pump 23 is immersed in the tank 22, but it may be provided on the upper plate portion 21A. Also, tank 2
The bottom plate portion 20A forming 2 is composed of a single member, and the back plate portion 20
B, the first side plate portion 20C, and the second side plate portion 20D were composed of a single member, and the upper plate portion 21A and the front plate portion 21B were composed of a single member.
Of course, the combination of the members to be appropriately configured can be changed without being limited to this.

[Effect of the device]

As described above, in the present invention, a tank is provided by sealing the inside so as to store oil inside, and this tank has a substantially quadrilateral bottom plate portion, a back plate portion standing up from the bottom plate portion, and standing up from the bottom plate portion. The first side plate portion that is installed and is connected to the back plate portion in a substantially orthogonal direction, the second side plate portion that is erected from the bottom plate portion and is opposed to the first side plate portion and is connected to the back plate portion in a substantially orthogonal direction, and the bottom plate portion. The front plate portion that stands upright and faces the back plate portion and is connected to the first side plate portion and the second side plate portion in a substantially orthogonal direction, and the back plate portion, the first side plate portion, and the second side plate that face the bottom plate portion. An electric motor that drives a hydraulic pump that sucks and discharges the oil stored on the upper plate of the tank and the flow of oil, which is composed of an upper plate that is connected to the front plate in a substantially orthogonal direction and is provided in a substantially square shape. A hydraulic control valve is mounted to control the tank, and the back plate of the tank and the first
The upper ends of the side plate portion and the second side plate portion extend above the uppermost portions of the electric motor and the hydraulic control valve, respectively, to form an exterior cover that covers the electric motor and the hydraulic control valve from three directions, and the back plate portion of the exterior cover The front opening facing each other and the upper opening located above the electric motor and the hydraulic control valve are closed by a removable lid member, and the exterior cover is provided with a mounting portion for the operating device. Therefore, the exterior cover is used as a tank. It is possible to simplify the assembly of the hydraulic unit by eliminating the need for mounting bolts to be attached to.

In addition, since the exterior cover has a mounting portion for the operating device and the front portion and the upper portion of the exterior cover are opened, the mounting on the operating device is compared with the conventional hydraulic unit having the front portion of the exterior cover opened. An effect that a large opening for maintenance and inspection work for replacing or inspecting the hydraulic control valve mounted on the upper plate can be obtained without impairing the performance, and a hydraulic unit with excellent handleability can be obtained. Has.

[Simple explanation of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a front view of a hydraulic unit whose cross section is partially shown, and FIG. 2 is a left side view of the hydraulic unit whose cross section is partially shown. Fig. 3 is the second
Sectional view along lines III-III in the figure, FIG. 4 is a perspective view of the tank and the exterior cover, FIGS. 5 to 7 show a conventional example of the present invention, and FIG. 5 shows a part in a cross section. The front view of the hydraulic unit, FIG. 6 is a hydraulic circuit diagram, and FIG. 7 is a plan view of the hydraulic unit. 20 …… Bottom plate, 20B …… Back plate, 20C …… First side plate, 20
D …… 2nd side plate part, 21A …… Upper plate part, 21B …… Front plate part, 22
…… Tank, 23 …… Hydraulic pump, 25 …… Electric motor, 29A, 2
9B …… Switching valve, 31 …… Exterior cover, 32 …… Lid member, 35 ……
… Mounting part.

Claims (1)

(57) [Claims for requesting utility model registration] 1. A tank whose inside is sealed so as to store oil is provided inside, and this tank has a substantially quadrilateral bottom plate portion, a back plate portion erected from the bottom plate portion, and a spine erected from the bottom plate portion. The first side plate portion that is connected to the plate portion in a substantially orthogonal direction, the second side plate portion that is erected from the bottom plate portion and is opposed to the first side plate portion and is connected to the back plate portion in a substantially orthogonal direction, and is erected from the bottom plate portion. The front plate portion that faces the back plate portion and is connected to the first side plate portion and the second side plate portion in a substantially orthogonal direction, and the back plate portion, the first side plate portion, the second side plate portion, and the front plate that face the bottom plate portion. The electric motor that drives the hydraulic pump that sucks and discharges the oil stored on the upper plate of the tank and the hydraulic pressure that controls the flow of the oil. A control valve is placed, and the back plate of the tank, the first side plate, and the second
An exterior cover is formed by extending the upper ends of the side plates and the electric motor and the hydraulic control valve above the uppermost portions of the electric motor and the hydraulic control valve, respectively, to cover the electric motor and the hydraulic control valve from three directions, and the front opening facing the back plate portion of the exterior cover. A hydraulic unit in which an electric motor and an upper opening located above the hydraulic control valve are closed by a detachable lid member, and a mounting portion for an operating device is provided on an exterior cover.