JPH02251396A - Hydraulic operation pressure working machine - Google Patents

Abstract

PURPOSE:To obtain the hydraulic operation pressure working machine of a small shape by providing intensively a motor and a hydraulic pump on a tank. CONSTITUTION:By placing and fixing a fitting flange 7D of a motor-driven pump assembly P onto the upper plate 6A, a motor 7 and a hydraulic pump 8 are placed in the outside of a tank 6 and in the inside of the tank 6, respectively, and the the motor 7 and the hydraulic pump 8 are fixed to the upper plate 6. By providing the motor 7 and the hydraulic pump 8 intensively on the tank, a working machine can be formed in a small shape. Also, the motor 7 and the hydraulic pump 8 are fixed integrally to each other by connecting axes of rotation 7B, 8B in advance, therefore, can be installed in the upper plate 6A by only fixing the motor 7 and the installation work can be executed easily.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention can perform caulking, drilling, and
This invention relates to a hydraulic pressure processing machine that performs pressure processing such as press-fitting and cutting.

[Conventional technology]

As a processing machine of this kind, the applicant filed an application earlier in 1973.
There is a model No. 3-23256, which has a tank for storing working fluid for the hydraulic cylinder on one side of the frame in which the hydraulic cylinder is installed, and a hydraulic pump inside the frame. At the same time, an electric motor for driving the hydraulic pump is disposed on the other side of the frame.

[Problems with conventional technology]

The processing machine of Utility Model Application No. 63-23256 has a problem in that the shape of the processing machine is thick because the tank and the electric motor are disposed on both sides of the frame.

The present invention aims to realize a hydraulically operated pressure processing machine that can be made smaller in size by disposing an electric motor and a hydraulic pump in a tank.

[Means to resolve the problem]

For this reason, the present invention provides a frame body having two side plates separated from each other with a protruding piece that protrudes horizontally from above, and a piston rod to which a tool is attached to the frame is placed between the two protruding pieces with the piston rod facing downward. A hydraulic cylinder is provided, and a tank is provided to store working fluid for the hydraulic cylinder. A horizontal flange is provided on the tank body around the upper opening to receive the upper plate and is placed on the upper edge of both side plates, and the flange is inserted through the upper plate placed on the flange. The upper plate is fixed to the tank body and the tank is fixed to the frame by screw members that are screwed into the side plates.The upper plate has an insertion hole that leads into the tank, and the electric motor is attached to the upper part and the tank is attached to the lower part. The electric pump assembly consists of a hydraulic pump that pumps internal working fluid, the lower part of which is in the tank, and the upper part which is connected to each other with their rotating shafts coaxially aligned and fixed together. The electric pump assembly is placed outside the tank and inserted into the insertion hole, and the electric pump assembly has a mounting flange that extends horizontally and does not pass through the insertion hole. is fixed to the upper plate.

[For production]

In such a hydraulically operated pressure processing machine according to the present invention, a box-shaped tank body is arranged between both side plates of the frame, and an electric pump assembly in which an electric motor and a hydraulic pump are integrally fixed is attached to the tank body. It is fixed to the upper plate that covers the upper opening, with the lower part inside the tank and the upper part outside the tank, so the electric motor and hydraulic pump are centrally installed in the tank, creating a small hydraulically operated pressure processing machine. can get.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

1 is a frame body, which includes a base IA, a bottom plate IB, and a side plate IC1ID.
, and a spacing plate IE. The side plates lc, ID have protruding pieces 100C, 100D that protrude horizontally at the top, and are spaced apart in parallel by welding the spacer plate IE placed between them, and the side plates IC, ID, on the bottom plate IB. The spacer plates IE are welded and integrated so as to stand upright, and are fixed to the base IA with bolts 2. 3 is a hydraulic cylinder, with a piston rod 3A to which a tool such as a caulking tool (not shown) is attached at the tip facing downward, and both protruding pieces 100C, 10
They are arranged vertically between 0D. The hydraulic cylinder 3 has a flange 3B provided horizontally on both protruding pieces 1.
It is installed in the frame 1 by contacting the lower edges of 00C and 100D and fixing with bolts 4, and the piston rod 3A
A workpiece attachment portion 5 is formed on the base IA facing the. Reference numeral 6 denotes a tank for storing the working fluid for the hydraulic cylinder 3, and on its upper plate 6A, an electric motor 7 is arranged outside the tank 6, and a hydraulic pump 8 driven by the electric motor 7 is arranged inside the tank 6. A valve device 9 for fixing the electric pump assembly P and controlling the operation of the hydraulic cylinder 6 is placed on the upper plate 6A. The valve device 9 connects the hydraulic cylinder 3 and the connecting body 1.
The tank 6 is connected to supply and discharge hydraulic fluid through the tank 0, and the tank 6 is connected to the tank 6 to receive the hydraulic fluid pumped by the hydraulic pump 8.
A discharge pipe 11 from the hydraulic pump 8 is connected therein, and a return pipe 12 is provided for returning the working fluid returned from the hydraulic cylinder 3 into the tank 6. Tank 6 is the third
The tank body 6B has a tank body 6B shown in FIGS. End wall plates 63 and 64 are erected from the periphery of the bottom wall plate 65 to form a box shape in which the width between the side wall plates 61 and 62 is narrower than that between the side plates IC1ID. Side wall plate 61.62, end wall plate 63.64
A flat plate 67 with a hole 66 in the center is welded to the upper end of the
A more fixed horizontal flange 6c is formed, and the hole 66 is
An upper opening 60B of the tank body 6B is formed by this. At this time, the flat plate 67 is wider than the width between the side plates IC and ID, and the tank body 6B disposed between the side plates IC1ID has a flange 6C resting on the upper edge of both side plates IC11D and a drain plug 14 installed therein. , and 70 is a bolt 1 provided on the flange 6C and is a screw member for fixing.
This is a through hole through which the hole 5 is inserted.

The upper plate 6A has a flat plate shape as shown in FIG. 6, and has a fitting hole 72 for the electric pump assembly P, a discharge pipe 11, and a return pipe 12.
In addition to penetrating a tube insertion hole 73 for this purpose, an installation hole 74 for installing a liquid supply column 16 which also serves as an air breather is also penetrated therethrough. In addition, 75 is a bolt 1 for fixing the electric pump assembly P.
7 and 76 are screw holes into which bolts (not shown) for fixing the valve device 9 are screwed, respectively, and 77 is a through hole for the bolt 15.

As shown in FIG. 7, the electric pump assembly P has a recess 7A on the end face of the electric motor 7 disposed in the upper part, and the electric motor 7 The rotary shaft 8B of the hydraulic pump 8 is coaxially aligned and fitted to the rotary shaft 7B of the rotary shaft 7B of the hydraulic pump 8.
B and 8B are connected, and while maintaining this connected state, bolt 18
The hydraulic pump 8 and electric motor 7 are integrally fixed to each other. An annular mounting flange 7D having a larger diameter than the fitting hole 72 is formed on the electric motor 7 and projects horizontally, and the fitting flange 7D is formed so that the hydraulic pump 8 is positioned in the tank 6.
2, and the mounting flange 7D is placed on the upper plate 6A so as to cover the insertion hole 72 from the outside of the tank 6.
The electric pump assembly P is fixed to the upper plate 6A. Further, the valve device 9 has a switching valve 9 as shown in the circuit diagram in FIG.
1 and a sequence valve 9 with a check valve.
3, a relief valve 95, and a check valve 9.
6 and the upper plate 6 covering the tube insertion hole 73.
It is fixed on A in a stacked state. In addition, to the hydraulic pump 8, a connection body 21 to which a suction pipe 20 having a strainer 19 at the lower end is connected is fixed with a bolt 22 to the open/close portion of the suction port 8C for suction of hydraulic fluid. In order to supply hydraulic fluid to the valve device 9, a connecting body 24 in which one end of the discharge pipe 11 is connected with a joint 23 is fixed to the opening of the discharge port 8D with a bolt 25, and the other end of the discharge pipe 11 is connected to a joint 26. It is connected to the structure 97 of the valve device 9 by a. The upper plate 6A to which the electric pump assembly P1 valve device 9 is fixed in this way is attached to the flange 6 so as to cover the upper opening 60B of the tank body 6B.
C is placed on the tank body 6B through the plate-shaped gasket 27, and is fixed to the tank body 6B by the screwing of the outer plates IC and ID of the bolt 15 which are inserted through the through holes 77 and 70. The tank 6 is fixed to the frame 1 by mounting.

The operation of this embodiment will be explained. When the switching valve 91 is moved from the neutral position shown in the figure to the left position, the piston rod 3A of the hydraulic cylinder 3 held at the rising end is lowered. At this time, until the work tool (not shown) attached to the piston rod 3A comes into contact with the workpiece (not shown), the load is small and the sequence valve 93 with check valve does not open, and the flow from the hydraulic cylinder 3 The returning liquid flows through the check valve 96 and joins the supply liquid from the hydraulic pump 8, forming a differential circuit and discharging the piston rod 3.
A is rapidly lowered. When the tool comes into contact with the workpiece, the pressure of the supply liquid increases due to the increase in load, and the sequence valve 93 with a check valve opens, and the return liquid from the hydraulic cylinder 3 is returned to the tank 6, and the differential circuit is activated. The problem is solved, and the piston rod 3A exerts a large output to perform machining. After the machining is completed, when the switching valve 91 is placed in the right position, the piston rod 3A rises. In this embodiment, the mounting flange 7D of the electric pump assembly P is placed and fixed on the upper plate 6A, so that the electric motor 8 is placed outside the tank 6, and the hydraulic pump 8 is attached to the tank 6.
An electric motor 7 and a hydraulic pump 8 are fixed to the upper plate 6A inside the tank, and the electric motor 7 and hydraulic pump 8 can be arranged centrally in the tank to make the processing machine smaller. Furthermore, since the electric motor 7 and the hydraulic pump 8 are integrally fixed to each other by connecting the rotation shafts 7B and 8B in advance, they can be installed on the upper plate 6A by simply fixing the electric motor 7, thereby reducing the installation work. This can be done easily, and the properties such as surface roughness of the mounting flange 7D mounting portion of the upper plate 6A do not particularly affect the coaxiality of both rotating shafts 7B and 8B. with exceptional precision (no machining is required, and it is possible to install the tank in its original state).Furthermore, the upper plate 6A and the tank body 6B are fixed at the same time as the tank 6 is fixed to the frame l using the bolts 15. Therefore, there is no need to provide a separate fixing means, and furthermore, the weight of the upper plate 6A, electric motor 7, hydraulic pump 8, and valve device 9 can be supported by the side plate IC11D via the flange 6C, and the tank body 6B is Since there is no need to make it strong, the tank 6 can be inexpensive, and the processing machine can be inexpensive.

In this embodiment, the hydraulic pump 8 is directly fixed to the electric motor 7, but the hydraulic pump can also be fixed to the electric motor via a bracket. It is also possible to abut the mounting flange on the top plate from inside the tank so as to cover the insertion hole, or to provide the mounting flange on the hydraulic pump.

〔Effect of the invention〕

In this way, the present invention is provided with a frame body having two side plates separated from each other with a protrusion piece that protrudes horizontally from above, and a piston rod to which a work tool is attached to the frame body is provided with the piston rod facing downward and between the two protrusion pieces. A tank is arranged to provide a hydraulic cylinder and a tank for storing working fluid for the hydraulic cylinder, the tank having a horizontal upper plate and a box disposed between both side plates and having an upper opening covered by the upper plate It has a shaped tank body, and horizontal flanges that are provided on the tank body around the upper opening to receive the top plate and are placed on the upper edges of both side plates, and the flange is inserted through the top plate that is placed on the flange. The upper plate is fixed to the tank body and the tank is fixed to the frame by screw members that are screwed into the side plates respectively. An electric pump assembly fixed to the liquid pumping out the working fluid in the tank is inserted into the insertion hole with the lower part inside the tank and the upper part outside the tank.
The electric pump assembly has a mounting flange that extends horizontally and does not pass through the insertion hole, and the electric pump assembly is fixed to the upper plate with the mounting flange in contact with the upper plate, and the electric motor and hydraulic pressure are connected to the tank. By arranging the pumps in a concentrated manner, it is possible to obtain a compact hydraulically operated pressure processing machine.

The electric motor and hydraulic pump are integrally fixed together with their rotational axes coaxially aligned and connected, and the mounting flange of the upper plate has an extremely high precision Coaxiality of mutual rotation axes can be obtained without machining, and the fixing of the upper plate and the tank body is done simultaneously by fixing the tank to the binding plate body using screw members, and separate fixing means are provided. (In addition, the weight of the upper plate and the electric pump assembly fixed to the upper plate can be supported by the side plate of the frame via the flange, and there is no need to make the tank body particularly strong.) This makes it possible to reduce the cost of hydraulic pressure processing machines.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIGS. 1 and 2 are a left side view, a front view, a front view, and FIG. 3, respectively, of a hydraulic pressure processing machine.
Figures 4 and 5 are a plan view, front view, and right side view of the tank body, respectively. Figure 6 is a plan view of the upper plate, and Figures 7 and 8 are of the hydraulic pressure processing machine. The main parts enlarged sectional view, enlarged right side view, and FIG. 9 are hydraulic circuit diagrams. 1... Frame, IC, ID... Side plate, 3... Hydraulic cylinder, 3A... Piston rod, 6... Tank,
6A... Upper plate, 6B... Tank body, 6c... Flange, 7... Electric motor, 7B... Rotating shaft, 7D...
- Mounting flange, 8... Hydraulic pump, 8B... Rotating shaft, 72... Fitting hole, 100C1100D... Projecting piece, P... Electric pump assembly.

Claims (1)

[Claims] A frame body is provided with a projecting piece that projects horizontally from above and has two side plates separated from each other, and a hydraulic cylinder is installed in the frame body by arranging a piston rod to which a work tool is attached facing downward and between both projecting pieces. and a tank for storing working fluid for the hydraulic cylinder, the tank having a horizontal upper plate;
A box-shaped tank body is arranged between both side plates and has an upper opening covered by an upper plate, and a horizontal flange is provided on the tank body around the upper opening to receive the upper plate and is placed on the upper edge of both side plates. The upper plate is fixed to the tank body and the tank is fixed to the frame by screw members that pass through the flange from the upper plate placed on the flange and are screwed to the side plates, and the upper plate is fixed to the tank body. It has an insertion hole that leads to the inside, and has an electric motor on the top and a hydraulic pump on the bottom that pumps out the working fluid in the tank. An integrally fixed electric pump assembly is inserted into the insertion hole with the lower part inside the tank and the upper part outside the tank, and the electric pump assembly has a mounting flange that extends horizontally and does not pass through the insertion hole. A hydraulic pressurized processing machine having a mounting flange in contact with the upper plate and an electric pump assembly fixed to the upper plate.