JP3035872U - Hydraulic actuator - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To enable the direction of a tool portion to be freely changed around an axis. A hydraulic operating device (1) is provided between a motor unit (2), a motor unit (2) composed of a hydraulic operating unit (4) and a tool unit (5), and a hydraulic operating unit (4). A turning mechanism 33 for turning around the shaft 6 is provided. The swivel mechanism 33 is composed of a proximal swivel portion 34 and a distal swivel portion 35. The base side swivel part 34, the circumferential groove 40 provided on the motor part 2 side, and the circumferential groove 4 provided on the hydraulic operating part 4 side.
And an engaging member 41 slidably engaged with zero. The tip-side turning portion 35 is constituted by a turning ring 43 that is attached to the outer peripheral surface of the casing body 7 so as to be turnable. The turning ring 43 is connected to the motor unit 2 via the gripping arm 44. By providing the turning mechanism 33, the orientation of the tool unit 5 can be freely changed around the axis.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a hydraulic actuator, and more particularly to a hydraulic actuator that can improve workability.

[0002]

[Prior art]

 Conventionally, for example, as disclosed in Japanese Examined Patent Publication No. 2-5498, a motor unit having an electric motor and a motor unit connected to the tip side of the motor unit to generate pressure oil by driving the electric motor. A hydraulic operating part that moves the slider back and forth in a straight line, and a tool that is connected to the tip of the hydraulic operating part and drives the tool by the slider to bend, cut, or punch a steel material. A small portable hydraulically actuated device having a section is generally known.

[0003]

[Problems to be solved by the device]

 By the way, in the conventional hydraulic operating device, since the hydraulic operating portion and the tool portion are integrally connected and the hydraulic operating portion and the motor portion are also integrally connected, the orientation of the tool portion is changed. When it is necessary to change around the axis, the entire hydraulic actuator must be rotated around the axis. In this case, the positions of the handle arm and operating switches are difficult to work, etc. There is a problem that workability becomes poor.

The present invention has been made in view of the above situation, and provides a hydraulic actuator that does not deteriorate workability even when it is necessary to change the orientation of the tool part around the axis. With the goal.

Another object of the present invention is to provide a hydraulic operating device that can obtain a stable swinging motion with a simple structure.

Another object of the present invention is to provide a hydraulic actuator in which a swivel mechanism can be easily assembled.

Still another object of the present invention is to sufficiently support the load and to obtain a good turning motion even when the weight of the tool part attached to the tip end side of the hydraulic operating part is heavy. Providing a hydraulic actuator.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a motor unit having an electric motor, and a hydraulic circuit that is connected to the tip side of the motor unit and generates pressure oil by driving the electric motor to linearly move the slider back and forth. A hydraulic actuating device comprising an actuating part, wherein a swivel mechanism for swiveling the hydraulic actuating part around the motor shaft of the electric motor is provided between the motor part and the hydraulic actuating part. . Therefore, even if it is necessary to change the orientation of the tool part attached to the tip side of the hydraulic operating part, it is sufficient to rotate only the hydraulic operating part around the axis line to improve workability. Is possible.

The present invention also provides a swivel mechanism at a circumferential groove provided at either the tip of the motor unit or the base end of the hydraulically actuated unit, and the tip of the motor unit or the base end of the hydraulically actuated unit. It is characterized in that it is constituted by an engaging member which is provided in either of the other of them and which slidably engages with the circumferential groove. As a result, the structure of the turning mechanism can be simplified and stable turning operation can be obtained.

The present invention is also characterized in that the circumferential groove is formed by butt-connecting two members each having a reduced diameter portion at the abutting end with the engaging member sandwiched therebetween. And Thus, the turning mechanism can be easily assembled.

Further, according to the present invention, the swivel mechanism is provided with a swivel ring rotatably attached to the outer peripheral surface of the intermediate portion of the hydraulically actuated part, and the swivel ring is connected to the motor part via the handle arm. Is characterized by. As a result, there are two turning support parts, and even if the weight of the tool part attached to the tip side of the hydraulic operating part is heavy, it is possible to sufficiently support the load and obtain a good turning motion. It will be possible.

[0012]

[Embodiment of the invention]

 Hereinafter, the present invention will be described with reference to the drawings. 1 to 6 show a hydraulic operating device according to an embodiment of the present invention. The hydraulic operating device 1 includes a motor section 2 having an electric motor 3 and a motor section 2 connected to a front end side thereof. The hydraulic operating unit 4 is provided, and the tool unit 5 provided on the tip side of the hydraulic operating unit 4 is provided. The hydraulic operating unit 4 is provided between the motor unit 2 and the hydraulic operating unit 4. A turning mechanism 33 for turning the electric motor 3 around the motor shaft 6 is provided.

The electric motor 3 of the motor unit 2 is arranged at the rear end of the casing main body 7 with the motor shaft 6 inserted in the casing main body 7 of the hydraulic operating unit 4. An oil tank 8 having an air hole 8a for opening to the atmosphere is provided inside 7. An oil leveler 9 made of a flexible material such as rubber and formed in a bag shape is disposed in the oil tank 8. The oil leveler 9 is fixed to the opening edge of the oil tank 8 via a stop ring 10, and the oil 11 for all the strokes of the piston 17 described later is accommodated therein. There is.

A hydraulic pump device 12 is provided at the center of the inside of the casing body 7, and a cylinder chamber 13 is formed at the tip of the casing body 7. The cylinder chamber 13 and the oil tank 8 are separated from each other. It is partitioned by the vertical wall 14. A hydraulic chamber 15 is provided on the side of the vertical wall 14 in the cylinder chamber 13, and the pressure oil generated by the hydraulic pump device 12 passes through the vertical wall 14 and has an oil discharge hole 16 provided therein. And is sent to the hydraulic chamber 15.

A piston 17 is disposed in the cylinder chamber 13 so as to be slidable in the axial direction, and a piston rod 18 as a slider is integrally formed at the center of the tip end surface of the piston 17. It is provided. The piston rod 18 penetrates the front end wall 19 of the casing main body 7 that seals the cylinder chamber 13 and projects out of the casing main body 7. The tip of the piston rod 18 is a knife 20 for a cutter forming the tool unit 5. Are attached so that they can be removed and replaced.

A drill hole 21 is formed in the center of the piston rod 18, and a return valve 22 is provided in the drill hole 21 so as to reciprocate. When the piston 17 is moved forward by a predetermined distance, the piston 17 comes into contact with the valve plate 23 mounted on the piston 17 to lift the return valve 22, and the pressure oil passes through the central through hole of the vertical wall 14 and the oil tank 8 It is supposed to be transferred to the side.

A return spring 24 is interposed between the front end surface of the piston 17 and the front end wall 19, and the urging force of the return spring 24 causes the piston 17 to move backward. Then, the inside of the cylinder chamber 13 on the side of the front end wall 19 via the piston 17 is opened to the atmosphere via the air hole 25, and it is considered that a negative pressure is not generated when the piston 17 moves backward.

On the other hand, the hydraulic pump device 12 has a plurality of pump cylinders 27 (only one is shown in the drawing) arranged at equal intervals in the circumferential direction on the outer peripheral portion of the cam portion 26 at the tip of the motor shaft 6. A piston 28 that reciprocates due to the rotational movement of the cam portion 26 is inserted in the pump cylinder 27. An oil suction groove 29 for supplying the oil 11 to the pump cylinder 27 is provided at the end of the pump cylinder 27, and an oil discharge hole 16 for discharging pressure oil is provided at the other end. ing . An open / close valve 30 for opening / closing the oil discharge hole 16 is arranged at the discharge side end of the pump cylinder 27.

Further, a jaw part 31 extending parallel to the piston rod 18 is provided at the lower end of the front end wall 19, and a tip end of the jaw part 31 constitutes a tool part 5 that constitutes the tool part 5 together with the knife 20. However, the knife 20 is arranged so as to be removable and replaceable. Then, the receiving fitting 32 cooperates with the knife 20 to cut a material (not shown).

As shown in FIGS. 1 to 6, the turning mechanism 33 includes a base end side turning part 34 provided between the tip of the motor part 2 and the base end of the hydraulic operating part 4, and a hydraulic operating part. 4 and a front end side turning portion 35 provided on the outer peripheral portion of the center.

The proximal-side turning portion 34 includes a fixing member 37 fixed to the tip of the motor unit 2 via a fixing bolt 36, and a connecting member 39 connected to the fixing member 37 via a connecting bolt 38. These members 37, 39 are provided with reduced diameter portions 37a, 39a at the abutting end portions thereof, respectively. Then, by circumferentially connecting the two members 37, 39 to each other, a circumferential groove 40 is constituted by the reduced diameter portions 37a, 39a, and the circumferential groove 40 is engaged with the circumferential groove 40. The member 41 is slidably engaged. That is, the circumferential groove 40 is configured by sandwiching the engaging member 41 and abutting and connecting the fixing member 37 and the connecting member 39.

As shown in FIG. 4, the engagement member 41 is integrally connected to the casing body 7 and the vertical wall 14 via a mounting bolt 42.

On the other hand, the tip-side swivel portion 35 is provided with a swivel ring 43 which is swivelably mounted on the outer peripheral portion of the casing body 7. The swivel ring 43 is connected to the motor unit 2 via a grip arm 44. It is fixed.

Next, the operation of this embodiment will be described. When the electric conduction motor 3 is started from the initial state shown in FIG. 1, the cam portion 26 at the tip of the motor shaft 6 rotates and the piston 28 is reciprocally driven. Then, the oil 11 in the oil leveler 9 is sucked into the pump cylinder 27 from the oil suction groove 29, and is supplied into the hydraulic chamber 15 through the post-oil discharge hole 16 pressurized here. As a result, the piston 17 and the piston rod 18 advance, and the material is cut between the knife 20 and the receiving fitting 32.

By the way, depending on the cutting position of the material and the like, the workability may be better when it is used sideways or downward than when it is used in the same upward direction in the circumferential direction as the grip arm 44. Previously this was not possible.

However, in the present embodiment, the turning mechanism 33 is provided between the motor unit 2 and the hydraulic operating unit 4, and as shown in FIGS. Since the position of 44 can be freely changed around the motor shaft 6, no matter how the direction of the tool portion 5 is changed, workability is not deteriorated.

In the above-described embodiment, the case where the swivel mechanism 33 is composed of the proximal end side swivel portion 34 and the distal end side swivel portion 35 has been described, but when the weight on the tool portion 5 side is light. The tip-side turning portion 35 may be omitted.

Further, in the above-mentioned embodiment, the case where the tool part 5 is composed of the cutter composed of the knife 20 and the receiving metal fitting 32 has been described, but the same applies to the case of a puncher composed of a punch and a die. The same effect can be expected.

[0029]

[Effect of the invention]

 As described above, according to the present invention, the swivel mechanism for swiveling the hydraulic operating part around the motor shaft of the electric motor is provided between the motor part and the hydraulic operating part. Even if it is necessary to change the direction of the tool part attached to the side, it is sufficient to rotate only the hydraulic operating part around the axis, and workability can be improved.

The present invention also provides a swivel mechanism at a circumferential groove provided at either the tip of the motor section or the base end of the hydraulic operation section, and the tip of the motor section or the base end of the hydraulic operation section. Since it is composed of an engaging member which is provided on either of the above and slidably engages with the circumferential groove, the structure of the turning mechanism is simplified and a stable turning operation is obtained. be able to.

In the present invention, since the circumferential groove is formed by butt-joining two members each having a reduced diameter portion at the butting end with the engaging member sandwiched between them, The mechanism can be easily assembled.

The present invention further provides the swivel mechanism with a swivel ring rotatably mounted on the outer peripheral surface of the intermediate portion of the hydraulically actuated part, and the swivel ring is connected to the motor part motor part via the gripping arm. Since there are two turning support parts, even if the weight of the tool part attached to the front end side of the hydraulic operating part is heavy, it is possible to sufficiently support the load and obtain a good turning motion. .

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a hydraulic operating device according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

FIG. 4 is an exploded perspective view of a turning mechanism.

5 is a perspective view of the device of FIG.

FIG. 6 is a view corresponding to FIG. 5 showing a state in which the grip arm is rotated counterclockwise by 90 degrees.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydraulic operating device 2 Motor part 3 Electric motor 4 Hydraulic operating part 5 Tool part 6 Motor shaft 7 Casing body 8 Oil tank 12 Hydraulic pump device 14 Vertical wall 15 Hydraulic chamber 17 Piston 18 Piston rod 20 Knife 32 Receiving metal fitting 33 Swing mechanism 34 units End side swivel part 35 Tip side swivel part 37 Fixing members 37a, 39a Reduced diameter part 39 Connecting member 40 Circumferential groove 41 Engaging member 43 Swiveling ring 44 Grasping arm

Claims (4)

[Utility model registration claims] 1. A motor unit having an electric motor, and a hydraulic operating unit which is connected to the front end side of the motor unit to generate pressure oil by driving the electric motor to linearly reciprocate the slider. In the hydraulic operating device, a turning mechanism for turning the hydraulic operating part around the motor shaft of the electric motor is provided between the motor part and the hydraulic operating part. 2. The turning mechanism comprises a circumferential groove provided at either the tip of the motor section or the base end of the hydraulic operation section, and the tip of the motor section or the base end of the hydraulic operation section. The hydraulic actuating device according to claim 1, further comprising an engaging member that is provided on the other side and that slidably engages with the circumferential groove. 3. The circumferential groove is formed by abutting and connecting two members each having a reduced diameter portion at the abutting end with an engaging member interposed therebetween. The hydraulically actuated device described. 4. A swivel mechanism includes a swivel ring rotatably attached to an outer peripheral surface of an intermediate portion of a hydraulically actuated portion, and the swivel ring is connected to a motor portion via a grip arm. The hydraulic actuator according to claim 1, 2 or 3.