JPH09103911A - Hand held hydraulic machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic machine tool which is easily handled to deal with various operations when a target article different in dimension is machined or different work is done by attaching a tool. SOLUTION: A main body housing 1 is composed of a casing 2 in which a pump driving mechanism is incorporated and a pump main body 10 and a hydraulic cylinder 46 to which a tool 54 is attached so as to be detached is connected to the pump main body 10 as an attachment so as to be disconnected. The hydraulic cylinder 46 having a propelling force and a stroke corresponding to the operation of the tool 54 and an oil tank 20 having a capacity corresponding to the hydraulic cylinder 46 are each replaced by another and by using various tools 54, many kinds of work is properly carried out with one main body housing 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to crimping, compression, cutting,
The present invention relates to a hand-held hydraulic processing machine for performing processing such as bending on site.

[0002]

2. Description of the Related Art For performing on-site work such as crimping wire terminals, compressing pipe connection sleeves, cutting cables and rods, and bending pipes and rods, the oil tank, pump, hydraulic cylinder and required oil passages must be connected. A hand-held main body housing with a control valve and a manual or electric pump drive mechanism, and a tool for performing the required processing.A hydraulic cylinder is placed at the tip of the main body housing and attached in front of it. The hand-held hydraulic processing machine that operates the machine is widely known and put into practical use.

In these processing machines, the tool is inevitably worn or deteriorated during repeated use,
In addition, there is a risk of deformation or damage, so it is usually possible to remove it for repair or replacement.

Further, it is planned to use not only the tools which can be removed but also the tools suitable for the work pieces having different sizes, and also the different body tools to carry out various operations by the common body housing. It is also possible (see Japanese Patent Application Laid-Open No. 2-104498).

[0005]

The main body housing of the above-mentioned hand-held hydraulic processing machine has a casing having a handle that can be held by hand and a pump drive mechanism built therein, and a pump main body to which an oil tank is attached. It is composed of a hydraulic cylinder, and these are made separately as described in JP-A-2-104498 and connected to each other by bolting, or disclosed in JP-A-6-47590. Like a thing, it is constructed by integrally forming a pump main body and a hydraulic cylinder and connecting them to a casing, and both are handled as one unit.

Therefore, the thrust and stroke of the hydraulic cylinder are determined by the manufacturing specifications, and when the tool is replaced in such a main body housing, the operation of the tool is limited by the specifications of the hydraulic cylinder. For this reason,
For example, in a processing machine designed for the purpose of compressing a work piece of a certain size, when a tool suitable for compressing a work piece having a larger diameter is used, there is a risk of insufficient compression. Also, even if you try to change to a cutting tool,
It obviously cannot be used because it requires a larger stroke than compression.

Therefore, in order to adapt to workpieces having different sizes and to cope with various operations, it is possible to equip a hydraulic cylinder adapted to the one requiring the maximum thrust and stroke among the various kinds of tools. It is conceivable that the main body housing will be large and heavy, and such a main body housing will always be used even when processing a small stroke, which is disadvantageous for handling in a narrow space. It is easy to invite.

According to the present invention, in the above-mentioned conventional hand-held hydraulic processing machine in which the casing, the pump main body, and the hydraulic cylinder form one unit to form the main body housing, the work pieces having different sizes by changing the tools are used. However, even if it is attempted to further improve the efficiency of the use of one body housing by performing different work, it is not possible to handle a wide range of work due to the limitation of the hydraulic cylinder, or for that reason, the hydraulic cylinder It is intended to solve the problem that the usability becomes worse when the size is increased.

[0009]

To this end, according to the present invention, a main body housing is constituted by a casing having a handle for holding a hand and a pump main body to which an oil tank is attached, and a hydraulic cylinder is detachably attached to a tip end side. As an attachment, it is detachably and liquid-tightly connected to the tip of the pump body so that the working oil is supplied to and discharged from the hydraulic cylinder directly from the tip surface of the pump body.

In addition to this, at least one hydraulic cylinder whose piston diameter and piston stroke are adapted to the operation of the tool, at least one tool having a different size in the same application, at least one tool having a different application, and a different capacity. At least one of the oil tanks was provided as a replacement part.

As a result, in addition to the replacement of tools that have been worn or damaged, it is possible to perform processing on workpieces of different sizes or different workpieces by using either a hydraulic cylinder, a tool or an oil tank. It is possible to achieve the purpose of appropriately performing one or two or more by exchanging two or more, and effectively utilizing one main body housing to easily handle various work in the field.

[0012]

1 and 2 show one of the embodiments of the present invention in which a hand-held handle 3 extending in a direction substantially perpendicular to a central axis of an electric motor is integrally provided. A pump main body 10 is arranged so as to overlap the tip of the casing 2 and is fixed by bolts 9. These constitute the main body housing 1, and the battery 4 housed in the handle 3
The electric power is supplied to the electric motor 6 by operating the trigger type switch 5 for opening and closing the switch.

The output shaft 7 of the electric motor 6 projects into the pump body 10 and has bearings 13, 1 on the intermediate wall 12 and the tip wall 14.
5 is rotatably supported, and the penetrating portion of the intermediate wall 12 is made liquid-tight by an oil seal (not shown), and the disc-shaped cam 16 is eccentrically fitted and held in the working chamber 11 between them. There is.

The pump body 10 is a block 1 of a short column shape that is perpendicular to the central axis and projects in the same phase direction as the handle 3.
7 and has a bottomed cylindrical oil tank 20 made of an oil resistant stretchable material such as synthetic rubber that blocks the opening edge 17
It is removably attached by being fitted in the ring groove 18 at the tip of and is pressed and fixed by the split ring spring 21. Further, the oil tank 20 is loosely wrapped in a hard cover body 22 having a cylindrical shape with a bottom, in which an opening edge portion is screwed into a screw 19 at a tip portion of the block 17.

The block 17 is provided with a through hole 24 which communicates the working chamber 11 with the oil tank 20, and the inlet check valve 2 which opens toward the inside of the through hole 24 at the opening end to the oil tank 20.
8 is provided, and the plunger 25 is fitted on the working chamber 11 side. A portion of the through hole 24 between the inlet check valve 28 and the plunger 25 forms a pump chamber 26, and a spring 27 for pressing the plunger 25 against the outer peripheral surface of the cam 16 is inserted therein. The plunger 25, the pump chamber 26, and the spring 27 constitute the pump 23.

An oil passage 29, which branches from the pump chamber 26 and opens on the center axis of the tip wall 14 of the pump body 10, is formed in the block 17 and the tip wall 14. Is provided with an outlet check valve 31 that closes toward the pump chamber 26. Furthermore, the oil passage 2
A discharge passage 33 having a high-pressure safety valve 34 that opens at a pressure higher than a predetermined value and a discharge passage 35 having a manual return valve 36 are branched downstream of the outlet check valve 31 of 9 in the oil tank. It communicates with 20. Therefore, the tip end opening portion of the oil passage 29 forms a supply / discharge oil port 30 through which oil flows in and out.

The return valve 36 closes the discharge passage 35 by the spring force of the valve closing spring 39 acting on the valve rod 38 extending from the valve body 37, but the valve rod protruding outward of the block 17. The discharge passage 35 is opened by directly pushing the end portion of 38 or engaging the lever (not shown) and pushing it by its rotation to separate the valve body 37 from the seat surface 40. The inlet check valve 28, the outlet check valve 31, and the high-pressure safety valve 34 have a well-known ball valve structure.

The front end surface of the pump body 10 where the oil passage 29 is open is the inner surface of a circular recess, and the recess has a female screw 41 on its peripheral surface to form a mounting hole 42. .

Next, the piston 4 is inserted into the cylinder barrel 48 whose rear end face is open and whose front end face is closed by the piston cover 47.
Tool 54 for crimping consisting of a hydraulic cylinder 46 in which 9 is fitted, a push die 55 detachably attached to the end of a piston rod 50, and a receiving die 57 detachably attached to a piston cover 47 by a stop pin 56. The attachment 45 constituted by
A sealing member composed of an O-ring that is detachably connected to the tip of the main body housing 1 by fitting a threaded cylindrical portion 51 protruding from the rear end into the mounting hole 42 by screwing, and that is equipped on the front end surface of the pump body 10. Cylinder cylinder 48 in 53
It is made liquid-tight by the pressure contact of the end faces of.

The working chamber 11, the oil tank 20, the pump chamber 26, the oil passage 29, the discharge passage 33, the discharge passage 35, and the cylinder chamber 52 defined by the piston 49 of the hydraulic cylinder 46 and the pump body 10 are filled with oil. This oil is supplied from the oil supply port 43 to the working chamber 11, and then enters the oil tank 20 through the oil passage 44 provided in the block 17, and then the pump chamber 26, the passages 29, 33, 35, and the cylinder chamber. 52 is sequentially filled.

When the electric motor 6 is operated, the cam 1 of the output shaft 7
6 cooperates with the spring 27 to reciprocate the plunger 25,
The oil in the oil tank 20 is sucked into the pump chamber 26 to be pressurized, and the oil passage 2
The operation of feeding the material into the cylinder chamber 52 is repeated from 9, and the piston 49 is pushed to press-bond the workpiece sandwiched between the two dies 55 and 57. When the electric motor 6 is stopped and the return valve 36 is opened when the predetermined processing is completed, the oil in the cylinder chamber 52 passes through the oil passage 29 and the discharge passage 35, and the oil tank 2
Returning to 0, the piston 49 returns to the initial position by the spring force of the return spring 58.

In this embodiment, the pressing die 55 is fitted to the tip of the piston rod 50 by fitting, and the receiving die 57 is attached to the piston cover 47 by the stop pin 56, so that they are not worn or damaged. If it occurs, it can be easily removed for repair and replacement.
In the present invention, at least one tool 54 having different dimensions capable of performing a predetermined crimping process within the specification range of the hydraulic cylinder 46 is prepared as a replacement part, and by replacing it with a tool 54, it is suitable for a workpiece having different sizes. It is possible to perform crimping.

In the present invention, the hydraulic cylinder 46 and the tool 54 are
An attachment 45 composed of is attached to and detached from the main body housing 1 composed of the casing 2 and the pump main body 10. Utilizing this, at least one of the hydraulic cylinders 46 having different piston diameters and piston strokes is used as a replacement part so as to correspond to a tool having a size that cannot be subjected to predetermined machining within the specification range of one hydraulic cylinder 46. Got ready.

FIG. 3 shows the form, and FIG.
(A) shows a larger stroke of the piston 49, and (B) shows a larger diameter of the piston 49, as compared with those shown in FIG. In these, the dimensions of the screw cylinder portion 51 are the same, and the piston rod 5 for mounting the tool is attached.
The size of the insertion hole at the tip of 0 and the distance between the stop pin insertion holes of the piston cover 47 are also the same. By appropriately using these, it is possible to always perform proper processing on a workpiece having greatly different dimensions.
When connected to the pump body 10, the cylinder chamber 52 is formed as it is, and the oil supply / discharge oil port 30 of the oil passage 29 communicates with each other, so that the replacement operation can be easily performed.

Further, according to the present invention, at least one of the tools 54 having different uses is replaced so that various processing can be performed by utilizing the fact that the tool 54 of the attachment 45 can be detached from the hydraulic cylinder 46. Prepared as

FIG. 4 shows its form,
(A) is a movable die 61 attached to the piston rod.
And a fixed die 62 attached to the piston cover, (B) is a movable blade 63 attached to the piston rod and a fixed blade 64 attached to the piston cover.
(C) is a link holder 65 attached to the piston rod and arms 66, 66 attached to the piston cover, and two arc shapes that rotate about the pin 67 by these. A cutting tool suitable for a cable having blade members 68, 68 of
(Refer to Utility Model Publication No. 14545), (D) is a bending tool which is composed of a pressing die 69 attached to a piston rod and a receiving die 70 attached to a piston cover, and which is suitable for a die member. In these, the dimensions of the mounting portion to the piston rod and the mounting portion to the piston cover are the same.

Therefore, FIGS. 1 and 3A and 3B
By attaching an appropriate one of the hydraulic cylinders 46 shown in FIG. 4 to the main body housing 1, it is possible to give necessary thrust and stroke to various tools shown in FIG.

The piston 4 is used as the hydraulic cylinder 46.
9 having a large diameter and a large stroke, a built-in piston rapid feed mechanism, and two or more tools 54 having the same application but different sizes so that they can be applied to workpieces of various sizes. As a result, a single main body housing 1 can deal with various workpieces, which is more economical than the case where a large number of processing machines are prepared.

Further, the tool 54 is not limited to the one shown in the figure, and various types of tools can be applied as long as the attachment parts to the hydraulic cylinder 46 are the same.

In addition, in the present invention, the fact that the oil tank 20 and the cover body 22 can be detached from the pump body 10 makes use of at least the same size of the mounting portion to the block 17 and different volumes. One oil tank and a cover body suitable for this were prepared as replacement parts (not shown). When the volume of the cylinder chamber 52 of the hydraulic cylinder 46 is large, the required processing can be performed by replacing the oil chamber with a large-capacity oil tank without causing a shortage of oil.

The means for connecting the pump body 10 and the hydraulic cylinder 46 is not limited to the illustrated form, but sockets, unions and other known pipe joints can be diverted.

[0032]

As described above, the casing and the pump main body are used as the main body housing, and the hydraulic cylinder and the tool can be detached from the main body housing as attachments, and the tool can be detached, and in addition, the oil tank can be detached. According to the present invention, a hydraulic cylinder having a thrust and a stroke corresponding to a tool is replaced with an oil tank corresponding to the hydraulic cylinder, so that proper machining can be performed on workpieces having different sizes by using one body housing. That
It is possible to cause a tool having a different purpose to perform a predetermined operation. In addition, the size of the hydraulic cylinder and the oil tank can be changed according to the work content without installing the largest hydraulic cylinder or oil tank, which is disadvantageous for handling in a narrow space and may cause operator fatigue. It can solve the problem of being easy. Furthermore, since the oil can be supplied to and discharged from the cylinder chamber simply by connecting the hydraulic cylinder to the pump body, the replacement operation is easy.

[Brief description of the drawings]

FIG. 1 is a partially cut front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG. 1;

FIG. 3 is a vertical sectional view showing a form of a hydraulic cylinder applied to the present invention.

FIG. 4 is a front view showing a form of a tool applied to the present invention.

[Explanation of symbols]

1 body housing, 2 casing, 3 handle,
4 batteries, 6 electric motor, 10 pump body, 2
0 oil tank, 23 pump, 29 oil passage, 30 oil supply / exhaust port, 45 attachment, 46 hydraulic cylinder, 52 cylinder chamber, 54 tool

Claims (5)

[Claims] 1. A main body housing comprising a casing having a hand-held handle and a pump drive mechanism and a pump main body connected to the tip of the casing and having an oil tank attached thereto, and a hydraulic cylinder and a tip end side thereof detachably attached. An attachment in which the base end of the hydraulic cylinder is detachably and liquid-tightly connected to the tip of the pump body, and the oil supply / drain port of the oil passage provided in the pump body is formed on the tip surface of the hydraulic cylinder. A hand-held hydraulic processing machine characterized by opening toward the cylinder chamber of the cylinder. 2. The hand-held hydraulic processing machine according to claim 1, wherein at least one hydraulic cylinder having a piston diameter and a piston stroke adapted to the operation of the tool is provided as a replacement part for the attachment. Handheld hydraulic processing machine. 3. The hand-held hydraulic machine according to claim 1, wherein at least one tool having a different size for the same purpose is provided as a replacement part for the attachment. Processing machine. 4. The handheld hydraulic processing machine according to claim 1, wherein at least one tool having a different application is provided as a replacement part for the attachment. 5. The hand-held hydraulic processing machine according to claim 2, wherein the oil tank is detachably attached to the pump body, and at least one oil tank having a different capacity is provided as a replacement part for the body housing. A hand-held hydraulic processing machine characterized by.