JP2017015154A - hydraulic unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate component replacement on a frame and cleaning in an oil tank.SOLUTION: A hydraulic unit includes: a frame 4 on which a motor 2 and a pump 3 are placed; an oil tank 5 arranged below the frame 4; and a fixing frame body 10 including side frames 11 arranged on both sides of the oil tank 5. At the side frame 11, guide holes 61, 62 capable of guiding the oil tank 5 are formed. The frame 4 is constituted so as to take a state of being fixed with respect to the fixing frame body 10 and a state of not being fixed. In the state where the frame 4 is fixed with respect to the fixing frame body 10, the oil tank 5 is movable by being guided by guide holes 61, 62, and in the sate where the frame 4 is not fixed with respect to the fixing frame body 10, the frame 4 and the oil tank 5 are movable by being guided by the guide holes 61, 62.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hydraulic unit that supplies oil to a hydraulic actuator.

  In general, a hydraulic unit that is mounted on a main machine such as a machine tool and supplies high-pressure oil fed from a pump to a hydraulic actuator is known. Conventionally, as a hydraulic unit, a gantry is fixed on the top surface of a top plate of an oil tank that contains oil to be supplied to a pump, and a pump and a motor for driving the pump are fixed on the top surface of the gantry. There are some (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 06-42501

  In the hydraulic unit as described above, for example, when exchanging parts on the gantry, it is necessary to pull out the hydraulic unit from the main machine. However, since the mechanism for moving the hydraulic unit is not particularly provided in such a hydraulic unit, it is difficult to pull out the hydraulic unit. Further, when cleaning the oil tank, it is necessary to lift the top plate with a crane, and the cleaning work is difficult.

  Accordingly, an object of the present invention is to provide a hydraulic unit capable of easily exchanging parts on a gantry and cleaning an oil tank.

  A hydraulic unit according to a first aspect of the present invention includes a mount on which a motor and a pump driven by the motor are placed, an oil tank that is disposed below the mount and stores oil supplied to the pump, Guide rails arranged on both sides of the oil tank and configured to be able to guide the oil tank, and the frame is configured to be able to take a fixed state and an unfixed state with respect to the guide rail. The oil tank is movable while being guided by the guide rail in a state in which the gantry is fixed to the guide rail, and the gantry and the oil tank in a state in which the gantry is not fixed to the guide rail. Is guided by the guide rail and is movable.

  In this hydraulic unit, the hydraulic unit mounted on the main machine can be easily pulled out from the main machine by the guide rail. Furthermore, when the oil unit is pulled out from the main engine, it is possible to move only the oil tank by selecting whether the frame is fixed to the guide rail or not to be fixed to the guide rail, or the frame and the oil tank. You can choose to move. Therefore, select whether the base is fixed to the guide rail or not, move only the oil tank when cleaning the oil tank, and move the base and the oil tank when replacing parts on the base Thus, the oil tank can be easily cleaned and the parts on the gantry can be easily replaced.

  A hydraulic unit according to a second aspect of the present invention is the hydraulic unit according to the first aspect of the present invention, further comprising a seal member that seals between the gantry and the oil tank, and the guide rail includes In the fixed state, when the oil tank moves while being guided by the guide rail, the oil tank is configured to be separated downward from the gantry.

  In this hydraulic unit, it is possible to prevent the seal member disposed between the gantry and the oil tank from being detached when the oil tank moves relative to the gantry.

  A hydraulic unit according to a third aspect of the present invention is the hydraulic unit according to the first or second aspect, wherein when the oil tank moves while being guided by the guide rail, the oil tank makes point contact with the guide rail. It is characterized by moving in the state which was carried out.

  In this hydraulic unit, since the friction between the oil tank and the guide rail can be reduced, the oil tank can be easily moved while being guided by the guide rail.

  As described above, according to the present invention, the following effects can be obtained.

  In the first invention, the hydraulic unit mounted on the main machine can be easily pulled out from the main machine by the guide rail. Furthermore, when the oil unit is pulled out from the main engine, it is possible to move only the oil tank by selecting whether the frame is fixed to the guide rail or not to be fixed to the guide rail, or the frame and the oil tank. You can choose to move. Therefore, select whether the base is fixed to the guide rail or not, move only the oil tank when cleaning the oil tank, and move the base and the oil tank when replacing parts on the base Thus, the oil tank can be easily cleaned and the parts on the gantry can be easily replaced.

  In 2nd invention, when an oil tank moves with respect to a mount frame, it can prevent that the sealing member arrange | positioned between a mount frame and an oil tank remove | deviates.

  In the third aspect, since the friction between the oil tank and the guide rail can be reduced, the oil tank can be easily moved while being guided by the guide rail.

It is a perspective view of the hydraulic unit concerning the embodiment of the present invention. It is a perspective view of the fixed frame shown in FIG. It is a figure which shows the process at the time of pulling out only the oil tank of the hydraulic unit shown in FIG. 1, (a) is a components removal process, (b) is a middle slide process, (c) is a figure which shows a complete slide process. . It is a figure which shows the process at the time of pulling out the mount frame and oil tank of the hydraulic unit shown in FIG. 1, (a) is a component removal process, (b) is an intermediate slide process, (c) is a figure which shows a complete slide process. is there.

  Hereinafter, a hydraulic unit 1 according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the hydraulic unit 1 according to the present embodiment is disposed below a frame 4 on which a motor 2 and a pump 3 driven by the motor 2 are mounted, and is supplied to the pump 3. An oil tank 5 for storing oil, and a frame 4 and a fixed frame 10 to which the oil tank 5 is attached. As will be described in detail later, the hydraulic unit 1 pulls out only the mount 4 and the oil tank 5 on which the motor 2 and the pump 3 are mounted or the oil tank 5 in the forward direction toward the lower left in FIG. It is possible. In the following description, the moving direction of the oil tank 5 is referred to as “front-rear direction”, and the direction that is horizontal and orthogonal to the front-rear direction is referred to as “width direction”.

  The fixed frame 10 is fixed to a main machine (not shown) on which the hydraulic unit 1 is mounted. The gantry 4 and the oil tank 5 on which the motor 2 and the pump 3 are mounted are fixed to the main machine by being attached to the fixed frame 10. Here, the configuration of the fixed frame 10 will be described with further reference to FIG. The fixed frame body 10 includes two side frames 11 having a substantially L shape. As shown in FIG. 1, the two side frames 11 are arranged on both sides of the oil tank 5, the L-shaped horizontal portion 11 a faces the lower end of the oil tank 5, and the vertical portion 11 b is the oil tank 5. It faces the rear end. Two guide holes 61 and 62 are formed in the horizontal portion 11 a of the side frame 11. The guide hole 61 is formed at the front end portion of the horizontal portion 11a, and the guide hole 62 extends from the rear end portion of the horizontal portion 11a to the vicinity of the guide hole 61. The rear end portions 61a and 62a of the guide holes 61 and 62 are positioned above the remaining portions (portions excluding the rear end portions 61a and 62a).

  Two screw holes 5a (see FIGS. 3C and 4C) are formed at the lower end of the side surface of the oil tank 5, and the two screw holes 5a of the oil tank 5 are formed from the outside of the side frame 11. A screw 71 is inserted through the guide holes 61 and 62. The two screws 71 are located at the rear end portions 61a and 62a of the guide holes 61 and 62 when the oil tank 5 is in a normal position (a position where the hydraulic unit 1 can be operated). It is fixed to the body 10. A seal member 51 is attached to the entire upper end of the oil tank 5. When the screw 71 is located at the rear end portions 61a and 62a of the guide holes 61 and 62 and the hydraulic unit 1 is in the normal position, the seal member 51 of the oil tank 5 contacts the lower surface of the gantry 4 and The space between the oil tank 5 is sealed. As will be described in detail later, when the oil tank 5 is pulled forward with the screw 71 loosened, the screw 71 slides forward in the guide holes 61 and 62 as the oil tank 5 moves. . At this time, the screw 71 moves forward from the rear end portions 61a and 62a of the guide holes 61 and 62, and due to the difference in height between the rear end portions 61a and 62a of the guide holes 61 and 62 and the remaining portions, the oil tank 5 moves downward from the normal position. In this way, the oil tank 5 is movable while being guided by the guide holes 61 and 62.

  The horizontal portions 11a of the two side frames 11 are connected by two connecting frames 12 along the width direction. The vertical portions 11b of the two side frames 11 are connected by two connecting frames 13 and 14 along the width direction. The connection frame 14 is attached to the upper end of the side frame 11 and extends to the outside of the two side frames 11. At both ends of the connection frame 14, bent portions 14 a that are bent forward are provided. An opening 65 is formed in the bent portion 14 a of the connecting frame 14. A screw hole 4a (see FIGS. 4B and 4C) is formed at the rear end of the side surface of the gantry 4, and an opening 65 is formed from the outside of the bent portion 14a to the screw hole 4a of the gantry 4. Screw 72 is inserted through. That is, the gantry 4 is fixed to the fixed frame body 10 by the screws 72.

  The gantry 4 includes an oil supply port part 81 constituting an oil supply port for supplying oil to the oil tank 5, a suction part part 82 constituting a suction part for sucking oil in the oil tank 5 into the pump 3, and the pump 3. A drain hose 83 for returning drain oil discharged and cooled by the cooler 6 to the oil tank 5 and a tank port portion 84 which is a return port of return oil from the actuator of the main engine or a hydraulic circuit are attached. The oil filler part 81, the suction part part 82, the drain hose 83, and the tank port part 84 are all members that extend into the oil tank 5. Further, screws 73 for fixing the gantry 4 and the oil tank 5 and eye bolts 74 are respectively attached to the four corners of the gantry 4.

  Here, a procedure for removing only the oil tank 5 from the main machine, that is, removing it from the fixed frame 10 will be described with reference to FIG. First, the filler port part 81, the suction part part 82, the drain hose 83, and the tank port part 84, which are members extending into the oil tank 5, are removed from the gantry 4, and as shown in FIG. 3 (a). Then, the screws 73 and the eyebolts 74 for fixing the gantry 4 and the oil tank 5 are removed from the gantry 4. Subsequently, as shown in FIG. 3B, the oil tank 5 at the normal position is pulled forward while the screw 71 for fixing the oil tank 5 to the fixed frame 10 is loosened. At this time, since the gantry 4 is fixed to the fixed frame 10, only the oil tank 5 moves forward. As the oil tank 5 moves, the screw 71 moves forward from the rear ends 61a, 62a of the guide holes 61, 62, and the oil tank 5 is sealed between the gantry 4 and the oil tank 5 by the seal member 51. The normal position moves away from the gantry 4 from the normal position. Further, the screw 71 on the front side is removed from the two screws 71 arranged in the front-rear direction, and the oil tank 5 is moved until the screw 71 on the rear side moves to the front end of the guide hole 62 as shown in FIG. Pull out. When the oil tank 5 moves from the normal position shown in FIG. 3A to the position shown in FIG. 3C, the screws 71 attached to the oil tank 5 are the edge portions of the guide holes 61 and 62. It moves in the state of point contact.

  Next, a procedure for removing the entire hydraulic unit 1 from the main machine, that is, removing it from the fixed frame 10 will be described with reference to FIG. First, as shown in FIG. 4A, the screws 72 for fixing the gantry 4 to the fixed frame 10 are removed. Subsequently, as shown in FIG. 4B, the oil tank 5 in the normal position is moved by the motor 2 and the pump 3 with the screws 71 for fixing the oil tank 5 to the fixed frame body 10 loosened. Pull out together with the mounted base 4. As the oil tank 5 moves, the screw 71 moves forward from the rear end portions 61a and 62a of the guide holes 61 and 62, and the oil tank 5 moves downward from the normal position. Furthermore, the screw 71 on the front side is removed from the two screws 71 arranged in the front-rear direction, and the oil tank 5 is moved until the screw 71 on the rear side moves to the front end of the guide hole 62 as shown in FIG. Pull out. The oil tank 5 is attached to the oil tank 5 when it moves from the normal position shown in FIG. 4A to the position shown in FIG. 4C together with the mount 4 on which the motor 2 and the pump 3 are mounted. The screw 71 thus moved moves in a point contact with the edges of the guide holes 61 and 62.

As described above, the hydraulic unit 1 of the present embodiment is disposed on the frame 4 on which the motor 2 and the pump 3 are mounted, the oil tank 5 disposed below the frame 4, and both sides of the oil tank 5. A fixed frame body 10 including a side frame 11 is provided. Guide holes 61 and 62 that can guide the oil tank 5 are formed in the side frame 11. The gantry 4 is configured to be able to take a fixed state and a non-fixed state with respect to the fixed frame body 10, and in a state where the gantry 4 is fixed with respect to the fixed frame body 10, The gantry 4 and the oil tank 5 can be guided and moved by the guide holes 61 and 62 in a state in which the gantry 4 is not fixed to the fixed frame 10.
Therefore, the hydraulic holes 1 mounted on the main machine can be easily pulled out from the main machine by the guide holes 61 and 62. Further, when the hydraulic unit 1 is pulled out from the main engine, only the oil tank 5 is moved by selecting whether the gantry 4 is fixed to the fixed frame 10 or not fixed to the fixed frame 10. Or whether the gantry 4 and the oil tank 5 are moved. Therefore, select whether the base 4 is fixed or not fixed to the fixed frame 10, and when cleaning the oil tank 5, only the oil tank 5 is moved and when replacing the parts on the base 4 The gantry 4 and the oil tank 5 can be moved to easily clean the oil tank 5 and replace parts on the gantry 4.

  In addition, the hydraulic unit 1 of the present embodiment includes a seal member 51 that seals between the gantry 4 and the oil tank 5. When the gantry 4 is fixed to the fixed frame body 10, the oil tank 5 The oil tank 5 moves downward from the gantry 4 when moving while being guided by the guide holes 61 and 62. Therefore, when the oil tank 5 moves with respect to the gantry 4, it is possible to prevent the seal member 51 disposed between the gantry 4 and the oil tank 5 from being detached.

  Furthermore, in the hydraulic unit 1 of the present embodiment, when the oil tank 5 moves while being guided by the guide holes 61 and 62, the oil tank 5 moves in a state of point contact with the edges of the guide holes 61 and 62. . Accordingly, since the friction between the oil tank 5 and the edge portions of the guide holes 61 and 62 can be reduced, the oil tank 5 can be easily moved while being guided by the guide holes 61 and 62.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various design changes can be made as long as they are described in the claims. It is.

  That is, in the above-described embodiment, the case where the seal member 51 that seals between the gantry 4 and the oil tank 5 is provided at the upper end of the oil tank 5 has been described. It may be provided. Further, the sealing member 51 may not be provided.

  In the above-described embodiment, when the side frame 11 of the fixed frame 10 moves while the oil tank 5 is guided by the guide holes 61 and 62 in a state where the gantry 4 is fixed to the fixed frame 10. The case where the oil tank 5 is configured to be separated downward from the gantry 4 has been described. However, there is no need to move the oil tank 5 in the vertical direction.

  Furthermore, in the above-mentioned embodiment, when the oil tank 5 moves while being guided by the guide holes 61 and 62, the case where the oil tank 5 moves while being in point contact with the edges of the guide holes 61 and 62 will be described. However, it is not limited to this. Line contact may be sufficient as the oil tank 5 and the member which guides the oil tank 5, and surface contact may be sufficient as it.

DESCRIPTION OF SYMBOLS 1 Hydraulic unit 2 Motor 3 Pump 4 Mount 5 Oil tank 11 Side frame 11a Horizontal part (guide rail)
51 Sealing member

Claims (3)

A mount on which a motor and a pump driven by the motor are mounted;
An oil tank disposed below the gantry and containing oil supplied to the pump;
A guide rail arranged on both sides of the oil tank and configured to be able to guide the oil tank;
The gantry is configured to be able to take a fixed state and an unfixed state with respect to the guide rail,
In a state where the gantry is fixed to the guide rail, the oil tank is guided by the guide rail and is movable,
The hydraulic unit, wherein the gantry and the oil tank are guided by the guide rail and are movable in a state where the gantry is not fixed to the guide rail. A seal member for sealing between the mount and the oil tank;
The guide rail is configured such that the oil tank moves downward from the gantry when the oil tank moves while being guided by the guide rail in a state where the gantry is fixed to the guide rail. The hydraulic unit according to claim 1.   3. The hydraulic unit according to claim 1, wherein when the oil tank moves while being guided by the guide rail, the oil tank moves while being in point contact with the guide rail. 4.

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