JP2976090B2 - Hydraulic tool head and hydraulic tool with it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic tool head and a hydraulic tool equipped with the head. This hydraulic tool is 1
One kind of tool head can be attached to and detached from one hydraulic pump,
It can be suitably used to realize multi-function processing.

[0002]

2. Description of the Related Art A hydraulic tool comprises a hydraulic pump, and a tool head that uses a power supplied from a ram of the hydraulic pump as a drive source and drives a movable blade or a movable mold with the output to process a workpiece. There are various types such as an angle cutter, a hanger rail cutter, a bar cutter, a bar bender, a cable cutter, a screw cutter, a connector compressor, a terminal crimping machine, and a puncher, and a hydraulic tool according to a processing object is used. Therefore, workers who perform different types of work have to carry a plurality of hydraulic tools, which is a physical and economic burden.
Therefore, various types of tool heads can be attached to and detached from one hydraulic pump, and multifunctional machining is realized by sharing the hydraulic pump.

[0003]

However, while the magnitude and direction of the output of one hydraulic pump is constant depending on the diameter of the plunger and the output ram inside, the movable blade or The force required to apply to the movable mold varies depending on the object to be processed.

For example, assuming that the output of the hydraulic pump is 13 tons, it is sufficient for terminal crimping, connector compression, and screw cutter, but it is insufficient for cutting the angle because it requires 20 tons. Therefore, when an angle cutter is connected to the tip of such a common hydraulic pump to cut the angle, the angle of the receiving blade of the angle cutter is made a right angle to match the angle of the angle, but the angle of the cutting blade is By making the angle larger than the angle of the angle and bringing the cutting edge and the angle into point contact,
The output of the hydraulic pump was concentrated at the point of contact. For this reason, the cut surface of the angle on the receiving blade side obtained after cutting has a right-angled shape without deformation, but the cut surface of the angle on the cutting blade side has an obtuse angle due to the movement of the cutting blade. Will be transformed. Therefore, if it is desired to use the angle on the cutting blade side, the angle on the cutting blade side obtained by cutting must be turned 180 °, fixed to the receiving blade side, and cut again, which is troublesome. It is.

[0005] In addition, while the output of the hydraulic pump required for angle cutting and screw cutting is in the direction of pushing the ram, the operation example in which the movable blade or movable mold must be moved in the direction of pulling the ram in the opposite direction. There is hole punching. That is, the hole to be inserted in the pull box for inserting the conduit is usually made by drilling a small hole with a drill or a hole saw, then setting the screw axis of the tool head to the concave punch blade, the pilot hole, and the convex punch blade. , And further, a chucker is fastened to the screw shaft, the plate of the pull box is sandwiched between the concave and convex punch blades, and punched by hydraulic pressure. In this case, the concave punch blade serving as the fixed blade is located in front of the hydraulic pump, and the movable blade or the convex punch blade serving as the movable die is located beyond the hydraulic pump, and hydraulic pressure is applied in a direction to pull back the convex punch blade together with the chucker fastened to the screw shaft. Must work. Therefore, when the output of the common hydraulic pump acts in the direction of pushing the ram, simply attaching the screw shaft for inserting the concave and convex punch blade to the ram of the hydraulic pump cannot be applied to the drilling operation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hydraulic tool head capable of processing a variety of objects having different required output magnitudes and directions with a single hydraulic pump.

[0007]

In order to achieve the above object, a head of a hydraulic tool according to the present invention is connected to a portable hydraulic pump, and an output supplied from a ram of the hydraulic pump is used as a driving source. In a tool head that drives a movable blade or a movable mold by the output to process a workpiece, the output of the ram is changed between the connection portion with the hydraulic pump and the movable blade or the movable mold to change the output to the movable blade or the movable mold. It is equipped with a booster for transmitting.

As the booster, for example, a piston directly connected to a ram of a hydraulic pump, a cylinder for storing oil pressurized by the piston, and an outer diameter different from the piston, There is an operating ram that receives a pressing force at a rear end face, and increases or decreases the output of a pump-side ram in the same direction and transmits the output to a movable blade or a movable mold.

Another example of the booster includes a piston directly connected to a ram of a hydraulic pump, a first cylinder for storing oil pressurized by the piston, and an oil passage communicating with the first cylinder. An arm rotatably connected to the first cylinder rotatably about the axis of the first cylinder, and an oil reservoir rotatably connected to this arm rotatably about another axis intersecting the axis, and communicating with the oil passage. A second cylinder having a built-in reciprocating motion within the second cylinder, having a flange at the rear, and applying a pressure of the piston to the flange via oil supplied from the first cylinder to an oil reservoir via an oil passage. There is an actuator provided with an operating ram received at a front end face, and the output of the pump-side ram is changed in direction and transmitted to a movable blade or a movable mold.

Further, in order to achieve the above object, a hydraulic tool according to the present invention is detachably connected to a portable hydraulic pump, uses an output supplied from a ram of the hydraulic pump as a drive source, and In a hydraulic tool consisting of a tool head that processes a workpiece by driving a movable blade or a movable mold with output, the tool head changes the output of the ram between the connection part with the hydraulic pump and the movable blade or the movable mold. And a booster for transmitting the movable blade or the movable mold to the movable blade.

[0011]

The output of a constant magnitude and direction generated by the hydraulic pump is increased or decreased or changed direction by the booster and transmitted to the movable blade or movable mold.

[0012]

【Example】

-Example 1-This example is a hydraulic tool used for cutting an angle, and corresponds to claims 1, 2 and 4. Hereinafter, FIGS.
This will be described with reference to FIG. FIG. 1 is a partially cutaway front view showing a tool head connected to a hydraulic pump, FIG. 2 is a perspective view thereof, and FIG. 4 is a perspective view showing a hydraulic pump.

The tool head 1 is connected to a portable hydraulic pump 2 and supplied from a ram 13 of the hydraulic pump 2.
The output of the ton is used as a drive source, and the movable blade is urged by the output to cut the angle.

The tool head 1 is detachably fixed to the hydraulic pump 2 by inserting a pin 1b into a pin hole 2b of the second cylinder 2a at the tip of the hydraulic pump 2 and a pin hole 1a at the rear of the tool head 1. ing. The hydraulic pump 2 is a rechargeable type having a built-in electric motor, and is configured so that the ram 2c moves forward with the operation of the electric motor. The tool head 1 mainly includes a booster 3, a right-angle convex cutting blade (movable blade) 4, and a right-angle concave receiving blade (fixed blade) 5.

The booster 3 increases the output of the pump-side ram 2c and transmits the power to the cutting blade 4 between the connecting portion of the hydraulic pump 2 and the cutting blade 4, and the piston 6, the cylinder 7, and the operating ram. 8 is provided. More specifically, the piston 6 is directly connected to the ram 2c of the hydraulic pump 2, and reciprocates in a small-diameter space in the upper half portion of the cylinder 7. The cylinder 7 forms an oil chamber 7a for storing oil pressurized by the piston 6, and has a male screw portion 7b on the outer periphery of the lower end. Operating ram 8
Has an outer diameter that is 20/13 times larger than that of the piston 6, receives the pressure of the piston 6 at the rear end face through the oil in the cylinder 7, and reciprocates in the large-diameter space in the lower half of the cylinder 7. Move.

The cutting blade 4 is fitted on an upper holder 9 having a guide 9a on both sides at the lower end and a female screw hole 9b on the center upper surface.
It can be moved up and down by being guided by the guide 9a. The receiving blade 5 is fixed to the lower holder 10. The upper holder 9 and the lower holder 10 are fixed by inserting the pins 1c so that the respective pin holes provided on both sides thereof are aligned. Further, the cylinder 7 and the upper holder are connected to the female screw hole 9b of the upper holder 9 in a state where the spring 8b is arranged in the annular gap between the cylinder 7 and the operating ram 8.
The male screw portion 7b of the cylinder 7 is fitted to the
It is fixed by fastening with a lock nut 1d. The holding bolt 9c fixed to the front of the upper holder 9 is for fixing the angle portion on the side of the receiving blade 5 so as not to float during the shearing of the angle.

When manufacturing the tool head 1, the oil chamber 7a
The piston 6 is lifted by the inner spring 7c, a space for an oil reservoir is secured in the oil chamber 7a, oil is injected through an oil passage 7d from an upper entrance, and the oil is closed by a lid 6a. The oil chamber 7a is provided with an o-ring 6b
The liquid tightness is maintained by an o-ring 8a arranged on the outer periphery of the rear end of the operation ram 8.

When cutting an angle using the tool head 1, an angle (not shown) is first placed between the cutting blade 4 and the receiving blade 5, and the motor of the hydraulic pump 2 is driven to advance the ram 2c. Let it. Then, the piston 6 advances with the ram 2c, and the oil pressure in the oil chamber 7a increases. When the oil pressure exceeds the elastic restoring force of the spring 8b, the operating ram 8
Is pushed and advances with the cutting blade 4. At this time, the output of 13 tons of the pump side ram 2 c is increased to 20 tons in the same direction via the piston 6 and the operating ram 8 and transmitted to the cutting blade 4. Then, the cutting edge of the cutting blade 4 hits the angle and starts shearing, and ends the shearing when the cutting edge 4 engages with the cutting edge of the receiving blade 5.
It moves forward for a while while rubbing with and stops. Hydraulic pump 2
Is released, the operating ram 8 is retracted by being urged by the restoring force of the spring 8b, and the cutting blade 4 and the receiving blade 5 are separated. Since both the cutting blade 4 and the receiving blade 5 have a blade edge angle of 90 °, the cut surface of the angle is a right angle on both the cutting blade 4 side (upper left side in FIG. 2) and the receiving blade 5 side (lower right side in FIG. 2). And can be used as it is without re-cutting.

Example 2 This example is a hydraulic tool used for drilling holes in an iron plate, and corresponds to claims 1, 3 and 4. This will be described below with reference to FIG. FIG. 3 is a sectional view showing a tool head connected to a hydraulic pump.

The tool head 11 includes a portable hydraulic pump 2
And supplied from the ram of the hydraulic pump 2
An output of 3 tons is used as a drive source, and the movable blade is driven by the output to drill an iron plate.

The tool head 11 is detachably fixed to the same hydraulic pump 2 as in the first embodiment, similarly to the first embodiment.
It mainly consists of boosters 13. However, the structure of the booster 13 is different from that of the first embodiment as described in detail below.

That is, the booster 13 changes the direction of the output of the pump-side ram 2c and transmits the output to a convex punch blade (not shown), which is a movable blade. The piston 16, the first cylinder 17, the arm 19, the second A cylinder 20 and an operating ram 18 are provided. More specifically, the piston 16
Is directly connected to the ram 2c of the hydraulic pump,
Reciprocate inside. The first cylinder 17 has its piston 1
Forming an oil chamber 17a for storing oil pressurized by 6;
A large-diameter portion on the inner periphery of the lower end has a circumferential dividing groove 17b.

The arm 19 is connected to the oil chamber 1 of the first cylinder 17.
It has an oil passage 19a communicating with 7a. The arm 19 is fitted at one end of the oil passage 19a with the inner circumference of the lower end of the first cylinder 17, and has a split groove corresponding to the split groove 17b on the outer circumference (reference numeral omitted).
The piano wire 19b is inserted into the annular space surrounded by the split grooves so as to be rotatably connected to the first cylinder 17 around the axis of the first cylinder 17. I have. Further, the arm 19 is formed with a hinge hole having a large-diameter oil reservoir 19d connected to the oil passage 19a with a direction intersecting the axis of the first cylinder 17 as an axis, and the hinge hole rotates around the axis. The hinge pin 20a is fixed as possible.

The second cylinder 20 has an oil reservoir 20b,
The arm 19 is rotatably connected to the hinge pin 20a integrally with the hinge pin 20a. The oil reservoir 20b is
c and a communication hole (not shown) in the hinge pin 20a and communicates with the oil passage 19a.

The operating ram 18 has a cylindrical shape and is reciprocally housed in the second cylinder 20.
a from the first cylinder via the oil passage 19a
The pressing force of the piston 16 is received by the front end face of the flange 18a via the oil supplied to b. The operation ram 18 has a female screw portion 18b formed on the inner periphery thereof, and a long screw shaft (not shown) can be inserted and fixed therein by a screw motion. A spring 18c is disposed in a space surrounded by the rear end surface of the operation ram 18 and the inner periphery of the second cylinder 20, and biases the rear end surface of the operation ram 18.

When manufacturing the tool head 11, the oil chamber 1
The piston 16 is lifted by a spring 17c in the oil chamber 7a, a space for an oil reservoir is secured in the oil chamber 17a, oil is injected from one end of the arm 19 or an intermediate entrance, and the lid 19 is opened.
Close with e or 19f. The oil chamber 17a, the oil passage 19a, the oil reservoir 19d, and the oil reservoir 20b are provided with o-rings 16a, 17d2.
Liquid tightness is maintained at 0c and 18d.

When drilling a hole in an iron plate using the tool head 11, a small hole is first made with a drill or a hole saw, and then the screw shaft fixed to the operating ram 18 of the tool head 11 is replaced with a concave punch blade. Insert the pilot hole in the order of the pilot hole and the convex punch blade, then fasten the chucker to the screw shaft, and sandwich the iron plate with the concave and convex punch blades. Then, the electric motor of the hydraulic pump 2 is driven to move the ram 2c forward. Then, the piston 16 moves to the ram 2
c, the hydraulic pressure in the oil chamber 17a increases, and the pressure is transmitted to the front end face of the flange 18a of the operation ram 18. When the oil pressure becomes equal to or greater than the elastic restoring force of the spring 18c, the operating ram 18 retreats together with the screw shaft against the elastic force of the spring 18c, and the chucker fastened to the screw shaft and the convex punch blade in front of the chucker also recede. Thus,
The output of the pump-side ram 2c is changed in direction and transmitted to the convex punch blade. On the other hand, the concave punch blade is
Is prevented from retreating by the front end face 20d of the second member. Therefore, a hole having the same inner diameter as the outer diameter of the convex punch blade is punched into the iron plate by the engagement of the concave and convex punch blades. The output of the hydraulic pump 2 is released, and the operating ram 18 advances by being urged by the restoring force of the spring 18c, and the convex punch blade and the concave punch blade separate.

[0028]

As described above, according to the tool head of the present invention, a variety of machining methods can be performed with one hydraulic pump regardless of the magnitude and direction of the output.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a tool head according to a first embodiment.

FIG. 2 is a perspective view of the tool head.

FIG. 3 is an axial sectional view showing a tool head according to a second embodiment.

FIG. 4 is a perspective view of a hydraulic pump.

[Explanation of symbols]

1,11 Tool head 1a Pin hole 1b, 1c Pin 1d Lock nut 2 Hydraulic pump 2a Bracket 2b Pin hole 2c Ram 3,13 Booster 4 Cutting blade 5 Receiving blade 6,16 Piston 6a Cover 6b, 16a O-ring 7 Cylinder 7a Oil chamber 7b Male screw part 7c Spring 7d Oil path 8 Operating ram 8a O-ring 8b Spring 9 Upper holder 9a Guide 9b Female screw part 10 Lower holder 17 First cylinder 17a Oil chamber 17b Split groove 17c Spring 17d O-ring 18 Operating ram 18a Flange 18b Female thread 18c
Spring 18d O-ring 19 Arm 19a Oil passage 19b Piano wire 19c Joint 19d Oil reservoir 19e, 19f Lid 20 Second cylinder 20a Hinge pin 20b Oil reservoir 20co
-Ring 20d front end face

Claims (4)

(57) [Claims] 1. A tool head which is detachably connected to a portable hydraulic pump, uses an output supplied from a ram of the hydraulic pump as a drive source, and drives a movable blade or a movable mold by the output to process a workpiece. 3. The hydraulic tool head according to claim 1, further comprising a booster that changes the output of the ram and transmits the ram to the movable blade or the movable mold, between the connection portion with the hydraulic pump and the movable blade or the movable mold. 2. The booster has a piston directly connected to a ram of a hydraulic pump, a cylinder for storing oil pressurized by the piston, and an outer diameter different from the piston,
2. An operating ram for receiving a pressing force of a piston at a rear end face through oil in a cylinder, wherein the output of the pump-side ram is increased or decreased in the same direction and transmitted to a movable blade or a movable mold. Hydraulic tool head. 3. The booster has a piston directly connected to a ram of a hydraulic pump, a first cylinder for storing oil pressurized by the piston, and an oil passage communicating with the first cylinder. An arm rotatably connected to the first cylinder about an axis, and a second cylinder having an oil reservoir connected to this arm so as to be rotatable about another axis intersecting the axis and communicating with the oil passage; And a reciprocating built-in within the second cylinder, having a flange at the rear, receiving the pressing force of the piston at the front end face of the flange via oil supplied from the first cylinder to the oil reservoir via an oil passage. The hydraulic tool head according to claim 1, further comprising an operation ram, wherein the output of the pump-side ram is changed in direction and transmitted to a movable blade or a movable mold. 4. A portable hydraulic pump and an output which is detachably connected to the portable pump and which is supplied from a ram of the hydraulic pump as a drive source, and drives a movable blade or a movable mold by the output to process a workpiece. In the hydraulic tool including the tool head, the tool head is provided with a booster that changes the output of the ram and transmits the ram to the movable blade or the movable mold between the connection portion with the hydraulic pump and the movable blade or the movable mold. A hydraulic tool characterized by the following.