KR100273041B1 - Electric tool of hydraulic drive type - Google Patents

Abstract

PURPOSE: An electric tool is provided to prevent a wear of parts and a generation of noise and to extend a lifetime of the tool by installing a hydraulic motor for generating a large torque, and by providing a lubrication operation at a friction portion. CONSTITUTION: A hydraulic motor(20) is installed at an inside of a case. A hydraulic supply and recover pipes(14,15) are extended and installed at backside of the hydraulic motor(20). The hydraulic supply and recover pipes(14,15) are connected at a tube pipes(16,17). An axis(21) of the motor(20) is extended forward, and a first bevel gear(22) is installed at the end portion thereof. The axis is supported rotatably at an inside of the case(10) by a bearing(23). A rotating axis(24) is installed perpendicularly at the inside of the case(10) with regard to the axis(21). An upper portion and a lower portion of the rotating axis(24) are supported rotatably to the case(10) by a bearings(26,28). A second bevel gear(25) fitted to the first bevel gear(22) is installed at a body of the rotating axis(24) and is changed a transferring direction of a power at a right angle.

Description

Hydraulic Driven Power Tools

The present invention relates to a power tool, and more particularly to a hydraulically driven power tool driven by hydraulic pressure.

Generally, a power tool includes a drill for drilling a hole in a workpiece or a drill for changing a bit to fasten a screw, a saw for cutting wood or metal, a grinding machine for grinding a surface, and a planer for trimming a surface of wood.

Such a power tool is provided with a static motor inside and a rotating shaft is installed at the front end, which is connected to the motor and the power transmission device to rotate. In particular, an increase / deceleration device for changing a rotational speed of a motor is installed in the process of transmitting power, and a chuck that can be installed by exchanging a bit of a tool is installed at the tip of the rotating shaft. There are also chucks, like sandpaper power tools.

Such a power tool generates a rotational force by operating a motor by connecting an external power source or a battery power source to operate the power tool.

However, in the case of a power tool using a motor, if the motor is overloaded, the coil burns out, causing a breakdown. There is a problem in durability, such as causing a failure, shortening the life. In particular, the rotation speed is high, but it does not generate a large torque, so it is necessary to install a speed reducer so that a large torque can be obtained only by changing the speed.

Therefore, the present invention is equipped with a hydraulic motor capable of generating a greater torque than the motor to operate the power tool by hydraulic pressure, it is possible to perform any operation sufficiently, and by the lubrication action by the fluid supplied to the hydraulic motor The purpose of the present invention is to provide a hydraulically driven power tool that can lubricate the friction part generated during the rotational operation, thereby preventing the wear and noise of parts and extending the life thereof.

1 is a perspective view of a hydraulically driven power tool according to the present invention,

2 is a cross-sectional view of a hydraulically driven power tool according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10-Case 11-Handle 12-Control Button

13-Shaft bore 14-Hydraulic supply line 15-Hydraulic return line

16,17-Tube 18-Auxiliary handle 18a-Threaded portion

19-Tightening Hole 20-Hydraulic Motor 21-Shaft

22-First Bevel Gear 23-Bearing 24-Shaft

25-2nd bevel gear 26,28-Bearing 27-Chuck

29-Grinder Bit 30-Frame 40-Battery

42,43-Terminal 44-Cable 50-Drive motor

54-Hydraulic Pump

Hydraulic drive-type power tool of the present invention for achieving the above object, the power tool, comprising: a case having a button for operating the operation of the power tool; A hydraulic motor fixedly installed in the case and operated by hydraulic pressure; A rotating shaft having a chuck fixed to bit the tool bit at one end thereof and being rotatably supported at the front end of the case, the rotating shaft being connected to the shaft of the hydraulic motor by a power transmission device; The hydraulic motor and the hydraulic supply and recovery pipe is connected to achieve a hydraulic generating means for supplying the hydraulic pressure to the hydraulic motor.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a hydraulically driven power tool according to the present invention, Figure 2 is a cross-sectional view of the hydraulically driven power tool according to the present invention.

As shown in the case 10, the hydraulic motor 20 is installed. At the rear of the hydraulic motor 20, hydraulic supply and recovery pipes 14 and 15 are extended, and the hydraulic supply and recovery pipes 14 and 15 are flexible tube tubes for transmitting hydraulic pressure to be described later ( 16) and 17 are firmly connected.

The shaft 21 of the hydraulic motor 20 extends forward, and the first bevel gear 22 is installed at the front end thereof and is rotatably supported by the bearing 23 inside the case 10. Inside the case 10 in which the first bevel gear 22 is installed, a rotation shaft 24 formed perpendicular to the shaft 21 of the hydraulic motor 20 is provided. The upper and lower parts of the rotary shaft 24 are freely supported by the case 10 by the bearings 26 and 28. The second bevel gear 25 that is engaged with the first bevel gear 22 is installed on the body of the rotating shaft 24 to change the direction of transmission of power at right angles. The tip of the rotating shaft 24 is exposed to the outside of the case 10 through the shaft hole 13, and the chuck 27 is installed at the end thereof. The chuck 27 has a disc grinder bit 29. In this case, as well as the grinder, the chuck 27 may be fitted with a drill, a saw, a cutting blade 60 and the like.

The handle 10 is installed on the upper portion of the case 10. The upper surface of the handle 10 is provided with an operation button 12 for controlling the power tool. The operation button 12 functions to turn the driving of the motor on and off (ON / OFF) and can further control the speed of the drive motor (50). In order to enable such an operation, the operation button 12 and the motor should be electrically connected, and may be connected through a tube tube 16 and 17 having a separate electric wire to transmit hydraulic pressure. Of course, it can be controlled by remote control.

In addition, the side handle 10 is provided with an auxiliary handle 18 to facilitate the use of the power tool. The auxiliary handle 18 is screwed to the case 10 to form a fastening hole 19 on the side of the case 10 and one end of the auxiliary handle 18 to form a screw portion 18a by screwing. It is intended to be combined.

The rear side of the case 10 is connected to the flexible tube tubes 16, 17, which are connected to the flexible tube tubes 16 and 17 so as to transmit the hydraulic pressure to freely move the power tool. The other end of the tube tube 16, 17 is connected to the box-shaped frame 30 provided separately.

The frame 30 is provided with three seals, one of which is installed with a battery 40, the other one is provided with a hydraulic pump 54, the last seal is a hydraulic pump 54 A drive motor 50 for driving is installed to form one component.

Reference numeral 32 is a lid, 34, 36 is a fixture for fixing the lid 32 and a fixing groove corresponding to the fixture.

The hydraulic pump 54 is firmly connected to the flexible tube tubes 16 and 17 which transmit hydraulic pressure. The battery 40 is provided with two power supply terminals 42 and 43 and connects the terminals 42 and 43 to the motor as a cable 44 to supply power to the motor. In this case, the power supplied to the driving motor 50 may be supplied from the outside.

The hydraulically-driven power tool having this structure, when used, the user grasps the handle 10 with one hand and the auxiliary handle 18 with the other hand. Then, the operation button 12 installed on the handle 10 is operated to drive the driving motor 50 to drive the hydraulic pump 54. The flow of fluid is generated in the operation of the hydraulic pump 54 and is transmitted to the hydraulic motor 20 through the tube tubes 16 and 17 and the hydraulic supply tube 14 for supplying the hydraulic pressure, and to the hydraulic motor 20. The delivered fluid is returned to the hydraulic pump 54 through the hydraulic return pipe 15 and the tube pipe 16 and 17 again. Hydraulic pressure is generated by the flow of the fluid to operate the hydraulic motor 20.

In this way, the hydraulic pressure generated by the hydraulic pump 54 is transmitted to the hydraulic motor 20 to operate the hydraulic motor 20. By this operation, the first bevel gear 22 installed on the shaft 21 of the hydraulic motor 20 is rotated, and the second bevel gear 25 and the rotating shaft 24 meshed with the first bevel gear 22 are rotated. . Then, the grinder bitten by the chuck 27 of the rotating shaft 24 is rotated together to perform the grinding work. If the grinder needs to be rotated quickly during the grinding operation, the speed of the driving motor 50 may be adjusted by manipulating the button 12 of the handle 10. In particular, even if a lot of the rotational resistance, since the torque of the hydraulic motor 20 is large, any operation can be easily performed. In addition, if the gearbox is installed in the drive motor 50 for operating the hydraulic pump 54, or the gearbox is installed in the section for transmitting power from the hydraulic motor 20, the torque and rotational speed can be obtained. It can improve the performance of power tools.

If you need to drill, you can remove the grinder bit 29 bitten by the chuck 27, replace the drill bit not shown in the drawing, and use it as a drill. Can be done. In this case, the hydraulically driven electric motor is provided with a battery 40 in itself, and is connected between the hydraulic pump 54 and the hydraulic motor 20 by a tube tube 16 and 17 having a flexible and sufficient length. Therefore, it can be used as a mower for cutting the grass outdoors by inserting a mower blade.

As described above, since the hydraulically driven power tool of the present invention is driven by the hydraulic motor 20 operated by hydraulic pressure, it is possible to obtain a reliable and large torque, thereby exhibiting excellent performance. Therefore, there is an advantage that any task can be performed sufficiently.

In addition, since the fluid that operates the hydraulic motor 20 is a fluid, lubrication is automatically performed on each friction part, thereby preventing wear and noise of parts and extending the life of other hydraulically driven power tools. There is.

In addition, such a hydraulically-driven power tool can be used for a variety of interchangeable tools in the chuck (27) can be used for a variety of applications, especially since the battery 40 is provided in the small, but the self-assembled cutting blade on the chuck (27) There is an advantage that can be used as a mower outdoors.

Claims (1)

In forming various circuit patterns on the circuit board 1 by arranging a plurality of pattern lines 20 arranged as power lines, signal lines, and ground lines and ball lands 10 arranged at ends of the pattern lines, The dummy pattern lines 21 are arranged in an empty space 50 between the pattern lines 20 arranged at the edge of the circuit board, and in the arrangement of the ball lands 10 provided at the ends of the respective pattern lines 20. By forming dummy ball lands in an empty space 40 formed at the center of the circuit board 1 to form a circuit pattern uniformly, generation of voids during package molding by a mold compound is suppressed. Circuit pattern structure of a semiconductor package.