JP2011067907A - Oil pulse tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil pulse tool preventing heat of an oil pulse mechanism section from being transferred to an operator. <P>SOLUTION: The oil pulse tool has: an oil pulse mechanism section where its inside is filled with operating oil; a hammer case for covering the oil pulse mechanism section; a first and second holes provided in the hammer case; and a cover for covering the hammer case. A third and fourth holes are provided in the cover. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an oil pulse tool. In particular, the present invention relates to an oil pulse tool having a structure capable of cooling an oil pulse mechanism.

  The conventional technology will be described with reference to FIG.

  The oil pulse tool has an oil pulse mechanism between the motor and the output shaft.

  The oil pulse mechanism includes a cylindrical case that is rotated by the rotation of a motor, hydraulic oil that is filled inside the case, a spindle that has a rear portion inserted into the case, and a blade that is held by the spindle. Have.

  The oil pulse mechanism part seals the working oil between the blade and the inner surface of the case by the relative rotation of the case and the spindle, raises the oil chamber to a predetermined pressure, and instantaneously transmits the impact torque to the spindle. ing.

  In some cases, the hydraulic oil filled in the oil pulse mechanism section rises in oil pressure due to an increase in hydraulic pressure and leaks from the case. For this reason, it has been necessary to provide a structure in which the oil temperature does not easily rise.

  Therefore, a wind window is provided in the hammer case that covers the oil pulse mechanism, and the outside air flows into the hammer case by the wind window. The oil pulse mechanism can be cooled by the inflowing outside air.

JP2004-249423

  In the structure of Patent Document 1, a metal hammer case forms an outer frame. For this reason, the hammer case may damage wood or the like that is screwed by the spindle. Further, even when the hammer case is heated by the heat of the oil pulse mechanism, it is necessary for the operator to be able to work comfortably.

  Moreover, the arrangement of the wind window for cooling is not particularly considered, and efficient cooling has not been performed.

  The objective of this invention is providing the oil pulse tool which can make it difficult for the heat | fever of an oil pulse mechanism part to be transmitted to an operator.

  The object is to provide an oil pulse mechanism part into which hydraulic oil is put, an hammer case covering the oil pulse mechanism part, a first hole and a second hole provided in the hammer case, and the hammer case. And an oil pulse tool having a cover, wherein the cover is provided with a third hole and a fourth hole.

  By providing the hammer case with the first hole and the second hole and the cover with the third hole and the fourth hole, the heat of the hammer case is hardly transmitted to the operator.

  Further, by arranging the first hole and the second hole, and the third hole and the fourth hole at suitable positions, it is possible to efficiently allow the outside air to flow into the interior of the hammer case.

1 is a partial cross-sectional view of an oil pulse tool showing an embodiment of the present invention. 1 is a partial cross-sectional view showing the appearance of a hammer case of an oil pulse tool showing an embodiment of the present invention 1 is a partial external view of an oil pulse tool showing an embodiment of the present invention. 3 is an enlarged view of the main part. The figure which shows the cover and cross-section part of the oil pulse tool which show one Embodiment of this invention AA line arrow view of FIG. BB line view of FIG.

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

  FIG. 1 shows an electric rechargeable oil pulse driver 1 as an example of an oil pulse tool.

The rechargeable oil pulse driver 1 includes a body portion 52 that extends in the front-rear direction, and a handle portion 51 that extends downward from the body portion 52. A rechargeable battery 50 is detachably provided below the grip portion 51. A trigger 54 is provided in front of the grip portion 51 and in front of it. By operating the trigger 54,
An electric motor 2 is accommodated behind the body portion 52. An oil pulse mechanism unit 3 is connected to the motor 2 via a speed reduction mechanism unit.

  A hammer case 7 is fixed in front of the body portion 52. The body part 52 and the grip part 51 are constituted by left and right split (half) housings provided by integral molding of resin. The hammer case 7 is fixed to the body portion 52 by being sandwiched between the two split housings. An oil pulse mechanism is accommodated in the hammer case 7.

  The oil pulse mechanism unit 3 is placed in a case 5 fixed to the speed reduction mechanism unit, a fan 9 provided on the outer periphery of the case 5, a spindle 4 in which a rear portion is accommodated in the case 5, and the case 5. It is composed of hydraulic oil.

  The front end of the spindle 4 can be attached with a bit used for screw tightening.

  The fan 9 extends in the front-rear direction, and the length of the fan 9 in the front-rear direction is longer than the length of the exhaust port 11 (corresponding to the second hole) in the front-rear direction. Further, the front end of the fan 9 is located behind the rear end of the intake port 8 (corresponding to the first hole) (of the hammer case).

  The intake port 8 is provided in front of the exhaust port 11. The intake port 8 and the exhaust port 11 are provided on the side surface of the hammer case 7. In addition, the intake port 8 and the exhaust port 11 are arranged at two positions symmetrically about the spindle 4 in the left-right direction.

  The intake port 8 is provided below the rotation axis of the spindle 4. The exhaust port 11 is provided above the rotation axis of the spindle.

  Two intake ports 8 are provided, and one rib 8 </ b> A is provided between the two intake ports 8. Two exhaust ports 11 are provided, and one rib 11 </ b> A is provided between the two exhaust ports 11. This rib makes it difficult for dust and the like to enter the inside of the hammer case 7.

  A light 53 is disposed below the hammer case 7. The light 53 is fixed to the hammer case with screws.

  A cover 10 is provided so as to cover the hammer case 7 and the light 53. The cover 10 is made of resin. The cover 10 is provided in front of the cover and is fixed by a stopper 12 that engages with the hammer case 7 in an uneven manner.

  The cover 10 is provided with an intake port 13 (corresponding to the third hole) (for the cover), an exhaust port 14 (corresponding to the fourth hole) (for the cover), and a light hole 15. The intake port 13 and the exhaust port 14 are arranged at two positions symmetrically about the spindle 4 in the left-right direction.

  Referring to FIG. 4, the intake port 13 is provided at a location corresponding to the intake port 8. This corresponding location means that the intake port 8 is provided inside the intake port 13 when viewed in the left-right direction, which is a direction orthogonal to the paper surface. The air inlet 13 has seven holes. Between the holes, six ribs 13A are provided.

  Further, the exhaust port 14 is provided at a location corresponding to the exhaust port 11. This corresponding location means that the exhaust port 11 is provided inside the exhaust port 14 when viewed in the left-right direction which is a direction orthogonal to the paper surface. The exhaust port 14 has four holes. Three ribs 14A are provided between the holes.

  This rib makes it difficult for dust and the like to enter the hammer case 7 from the cover 10.

  The intake port 8 and the intake port 13 are provided below the rotation axis of the spindle 4.

  The exhaust port 11 and the exhaust port 14 are provided above the rotation axis of the spindle 4.

  FIG. 5 shows a left side view of the cover 10. The AA arrow view shown by this cover 10 is FIG. 6, and the BB arrow view is FIG.

  As shown in FIG. 6, the fan 9 is provided in the same cross section as the exhaust port 11 and the exhaust port 14. Moreover, the air discharged | emitted from the exhaust port 8 is disperse | distributed by the rib 13A.

  As shown in FIG. 7, the fan 9 is not provided in the same cross section as the intake port 8 and the exhaust port 13. For this reason, air can efficiently flow into the interior of the hammer case 7.

  As shown in the figure, the length of the intake port 13 in the vertical direction is shorter than the length of the intake port 8 in the vertical direction. For this reason, it is possible to reduce dust and the like from entering the inside of the hammer case 7 by the air inlet 13 of the cover.

  The operation of the rechargeable oil pulse driver 1 will be described.

  When an operator pulls the trigger 54 while holding the grip 51, the motor 2 is energized from the storage battery 50.

  When the motor 2 is energized, the motor 2 rotates. When the motor 2 rotates, the speed reduction mechanism portion rotates, and the case 5 fixed to the speed reduction mechanism portion rotates. When the case 5 rotates, the fan 9 rotates.

  When the fan 9 rotates, outside air flows into the hammer case 7 from the intake port 13 through the intake port 8. The inflowing outside air is moved backward in the hammer case 7 by the fan 9, and is moved from the exhaust port 11 to the outside of the hammer case 7 through the exhaust port 14. For this reason, the inside of the hammer case 7 can be efficiently cooled.

  When outside air flows into the hammer case 7, the air inlet 8 and the air inlet 13 are provided below the rotation axis of the spindle 4. For this reason, dust such as dust that has entered unintentionally from the intake port can be quickly stored in the lower part of the hammer case. For this reason, dust or other dust is less likely to move inside the hammer case, and dust positioned between the hammer case 7 and the oil pulse mechanism unit 3 is less likely to lock the rotation of the oil pulse mechanism unit.

  Further, the exhaust port 11 and the exhaust port 14 are provided above the rotation axis of the spindle 4. For this reason, the outside air warmed inside the hammer case 7 discharged from the exhaust port does not move toward the grip portion 51. For this reason, the workability of the worker is improved.

  The length of the intake port 13 in the vertical direction is shorter than the length of the intake port 8 in the vertical direction. As a result, dust such as larger dust does not easily flow into the interior of the hammer case 7 at the air inlet 13 of the cover 10.

  Further, the intake port 8 and the exhaust port 11 are provided not on the top surface of the hammer case 7 but on the left and right side surfaces. For this reason, even when dust or the like is flying in the work place, the dust is less likely to enter the hammer case 7 from the intake port 8 or the exhaust port 11.

  Further, the vertical length of the exhaust port 14 is shorter than the vertical length of the exhaust port 11. For this reason, the air in the warmed hammer case 7 can be discharged out of the hammer case 7 in a dispersed state. In this way, the air discharged from the hammer case 7 can be guided by the cover 10. For this reason, it is less likely that warm air hits the worker, and an oil pulse driver that is easy for the worker to use can be obtained.

  Various modifications can be made to the above-described embodiment of the present invention.

  In the present invention, the rechargeable battery 50 supplies power to the motor 2. Instead of the rechargeable battery 50, a structure for supplying power to the motor 2 with a commercial power source may be used. In this case, a plug that can be connected to an outlet is provided, a power cord is connected to the plug, and the power cord is connected to the motor.

  In the present invention, the electric motor 2 is rotated by electricity. You may rotate a motor irrespective of electricity. The motor may be an air motor that rotates using compressed air or an engine. For this reason, this motor may be any rotational drive source that rotates the oil pulse mechanism.

  In the present invention, the cover 10 is fixed by the stopper 12. This structure may be a structure in which the cover 10 is directly fixed to the cover 10 so as to be unevenly fitted to the hammer case 7.

The intake port and the exhaust port are provided on both the left and right side surfaces, but may be either one of the left and right sides. If the oil pulse mechanism is provided on both sides, the oil pulse mechanism can be cooled more efficiently, but there is an effect that the oil pulse mechanism can be cooled even on one side.

DESCRIPTION OF SYMBOLS 1 Rechargeable oil pulse driver 2 (Electric) motor 3 Oil pulse mechanism part 4 Spindle 5 Case 6 Blade 7 Hammer case 8 (Hammer case) intake port 9 Fan 10 Cover 11 (Hammer case) exhaust port 12 Stopper 13 ( Inlet 14 (for cover) Exhaust port (for cover)

Claims (7)

An oil pulse mechanism that contains hydraulic oil,
A hammer case covering the oil pulse mechanism,
A first hole and a second hole provided in the hammer case;
An oil pulse tool having a cover covering the hammer case,
An oil pulse tool, wherein the cover is provided with a third hole and a fourth hole. A fan is fixed to the oil pulse mechanism,
Outside air is taken into the interior of the hammer case through the third hole and the first hole,
The oil pulse tool according to claim 1, wherein the outside air is discharged to the outside of the hammer case through the second hole and the fourth hole. The oil pulse tool has a grip portion extending in the vertical direction,
2. The oil pulse tool according to claim 1, wherein the vertical length of the third hole is longer than the vertical length of the first hole. A spindle connected to the oil pulse mechanism and protruding forward from the hammer case;
The first hole is provided below the spindle,
The oil pulse tool according to claim 1, wherein the second hole is provided above the spindle. The oil pulse tool according to claim 1, wherein the first hole is provided at a position corresponding to the third hole. The oil pulse tool according to claim 1, wherein the second hole is provided at a position corresponding to the fourth hole. A fan is fixed to the oil pulse mechanism,
The oil pulse tool according to claim 1, wherein the cover is provided with a guide member that guides air discharged from the second hole.

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