TWI460055B - Impact tool - Google Patents

Description

Pulse pneumatic tool for precise load-carrying power

The invention relates to the technical field of pneumatic tools, in particular to a pulsed pneumatic tool capable of timely and rapid load-carrying power.

Conventional pneumatic tools are rotated by high-pressure gas sources and have been widely used in applications such as drilling, locking or releasing such as bolts or nuts. The conventional pneumatic tool structure is attached to the main body of the pneumatic tool. Grip, air inlet and crimping mechanism. The pressing mechanism controls the high-pressure gas to enter the pneumatic tool as the power of the wind-driven mechanism, and coaxially rotates the oil chamber mechanism disposed at the front end, wherein a power shaft mechanism is disposed inside the oil chamber mechanism, and the front end of the power shaft mechanism is provided. The tool heads are connected, and the structure combination is combined with the pressing mechanism for the control of the intake air, so that the high-pressure gas can be driven into the wind-driven mechanism, and the oil chamber mechanism connected to the front end of the coaxial linkage and the rotation of the power shaft mechanism is achieved. The purpose of locking the workpiece.

The problem faced by the aforementioned conventional pneumatic tools is that the high pressure gas can be sent to the wind drive mechanism, the oil chamber mechanism and the power shaft mechanism by the pressing mechanism as the intake air control, but when the power shaft mechanism is locked When the workpiece reaches the torque setting value, the pressure is renewed and sustained due to the lack of proper buffering or stopping mechanism. The problem of idling, long-term use may cause damage to components, not only increase maintenance costs, but also shorten the service life of pneumatic tools.

In view of this, the inventor of the present invention has proposed "improvement of the transmission device for automatically stopping the pneumatic tool", and the patent No. M328928 is used as a solution to effectively solve the problem that the above-mentioned conventional pneumatic tool cannot stop when the torque setting value is reached. .

However, the prior case (M328928) spilled oil from the oil chamber mechanism into the oil passage, triggering the action of the venting mechanism. Although the purpose of automatic stop of pneumatic tools can be achieved, there are still some unsatisfactory improvements in the implementation. For example, oil spillage from the oil chamber mechanism to the oil passage triggers the operation of the deflation mechanism, and a certain pressure must be accumulated in the oil passage. Pushing the deflation mechanism, and this accumulation will cause the accumulation of time and cannot be timely, and the hydraulic oil in the oil passage will gradually return to the oil chamber mechanism after the trigger, so that each time there is a waiting period of empty window. Moreover, if there is hydraulic oil remaining in the oil passage, the law of the waiting period of the empty window will be destroyed, and sometimes it may take three seconds, sometimes one second, which is assembled for the user or the precision workpiece. Words are obviously inconvenient.

In view of the above problems and deficiencies of the prior art, the main object of the present invention is to provide a device for accurately pulsing a pneumatic tool, thereby providing an automatic load-carrying power in a timely and rapid manner at a preset torque. In order to solve the problem, there will be a lack of empty window or waiting time.

According to the above object of the present invention, a pulsed pneumatic tool is proposed The precision pneumatic load device comprises a wind drive mechanism, a deflation mechanism, a power shaft mechanism and an oil chamber mechanism. The oil chamber mechanism includes an oil chamber cylinder, an oil storage cylinder body, a front end cover, a rear end cover, an oil passage pipe member, a plug seat, a cover, a first lock group and a second lock group. The oil storage cylinder body is placed in the oil chamber cylinder. The front and rear end covers are respectively provided with two ends of the oil storage cylinder body, and the rear end cover has a first-class shaft hole and a first and second oil passages communicating with each other. The oil pipe fitting is disposed in the oil storage cylinder body, and has a third oil passage corresponding to the position of the second oil passage and communicating with the oil injection hole. The plug seat is disposed in the class shaft hole in cooperation with the cover for receiving the first lock group. The second blocking group is disposed on the second and third oil passages. By the oil chamber mechanism composed of the above components, when the pneumatic tool is provided to reach a predetermined torque, the pneumatic tool can be fed back in time and quickly, so as to achieve the purpose of accurate load-carrying power.

1‧‧‧ pneumatic tools

11‧‧‧ Pressing structure

10‧‧‧ Subject

2‧‧‧Wind drive agency

21‧‧‧Top mast

22‧‧‧blade shaft

23‧‧‧Flexible components

3‧‧‧Dissipation mechanism

31‧‧‧ steel balls

32‧‧‧Air Runner

33‧‧‧ venting holes

34‧‧‧Flexible components

4‧‧‧Power shaft mechanism

41‧‧‧Power shaft

42‧‧‧ shaft seat

43‧‧‧ oil blade

5‧‧‧ Oil room agency

51‧‧‧ oil chamber cylinder

511‧‧‧ accommodating space

52‧‧‧ oil storage cylinder

521‧‧‧Oval room

522‧‧‧ accommodating holes

523‧‧‧ oil hole

53‧‧‧ front end cover

54‧‧‧Back end cover

541‧‧‧Class shaft hole

542‧‧‧First oil road

543‧‧‧Second oil road

545‧‧‧Adjustment hole

546‧‧‧Adjustment

5411‧‧‧First Class Department

5412‧‧‧Second Class Department

5413‧‧ Third Class Department

55‧‧‧oil pipe fittings

551‧‧‧ third oil road

552‧‧‧ oil inlet

56‧‧‧Seat

561‧‧‧Seat hole

562‧‧‧Limited ribs

563‧‧‧Wings

57‧‧‧ cover

571‧‧ ‧ alcove

572‧‧‧Perforation

58‧‧‧First Locking Group

58’‧‧‧Second Locking Group

581, 581’‧‧‧ steel balls

582, 582’‧‧‧Flexible components

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an embodiment of a device for accurately driving a pulsed pneumatic tool according to the present invention.

Fig. 2 is a schematic exploded view of an embodiment of a device for accurately driving a pulsed pneumatic tool according to the present invention.

Fig. 3 is a cross-sectional view showing the first embodiment of the device for accurately loading the impulsive power of the pulsed pneumatic tool of the present invention.

Fig. 4 is a second exploded view of the embodiment of the device for accurately charging the pulsed pneumatic tool of the present invention.

Fig. 5 is a cross-sectional view showing the second embodiment of the device for accurately charging the pulsed pneumatic tool of the present invention.

Fig. 6 is a cross-sectional view showing the third embodiment of the device for accurately loading the impulsive power of the pulsed pneumatic tool of the present invention.

Fig. 7 is a cross-sectional view showing the fourth embodiment of the apparatus for accurately driving the impulsive power of the pulsed pneumatic tool of the present invention.

Hereinafter, an embodiment of the device for accurately charging the pulsed pneumatic tool of the present invention will be further described with reference to the related drawings. In order to facilitate the understanding of the embodiments of the present invention, the same components are denoted by the same reference numerals.

Referring to Figures 1 to 5, the components of the pulsed pneumatic tool 1 are generally included in a main body 10, and are provided with a wind drive mechanism 2, a deflation mechanism 3, a power shaft mechanism 4 and an oil chamber mechanism 5 . The wind-driven mechanism 2 is driven by the high-pressure gas introduced from the air inlet 12 of the press-fitting structure 11 of the main body 10, and is connected to the air-discharging mechanism 3 and the oil chamber mechanism 5 at both ends of the wind-driven mechanism 2, wherein the oil chamber mechanism The front end is connected to the power shaft mechanism 4, and is rotated by the power shaft mechanism 4 to lock the workpiece (not shown), and the air deflation mechanism 3 can be damped by the oil chamber mechanism 5 when the power shaft mechanism 4 reaches the torque setting value. The wind drive mechanism 2 stops driving the oil chamber mechanism 5.

The device for accurately charging the pulsating pneumatic tool of the present invention is disposed in the oil chamber mechanism 5, and includes an oil chamber cylinder 51, an oil storage cylinder 52, a front and rear end covers 53, 54 and a Oil pipe fittings 55, a plug 56, A cover 57 and a first and second latching groups 58, 58' are formed.

The oil chamber cylinder 51 has an accommodating space 511 which is open in the axial direction. The oil storage cylinder 52 is disposed in the accommodating space 511 of the oil chamber cylinder 51, and includes an elliptical chamber 521 and is accommodated therein. A hole 522 and an oil hole 523. The elliptical chamber 521 and the receiving hole 522 are axially formed in the oil storage cylinder 52 and open at both ends. The elliptical chamber 521 provides the hydraulic oil and the shaft seat 42 of the power shaft mechanism 4 and the oil-removing blade 43. Set. The oil filling hole 523 is connected to the elliptical chamber 521 and the receiving hole 522 in a radial direction.

The front and rear end covers 53 and 54 are respectively disposed at two ends of the accommodating space 511 of the oil chamber cylinder 51 to close the cross section of the accommodating space 511 and the elliptical chamber 521 of the oil storage cylinder 52. The front end cover 53 provides the power shaft 41 of the power shaft mechanism 4 to extend. The rear end cover 54 has a first-class shaft hole 541, a first oil passage 542, a second oil passage 543, and an adjustment hole 545. The stepped shaft hole 541 is formed in the axial direction through the rear end cover 54 and forms a first step portion 5411, a second step portion 5412, and a third step portion 5413 which are gradually reduced on the inner wall surface. One end of the class shaft hole 541 is provided at one end of the top mast 21 of the wind drive mechanism 2. The first oil passage 542 is formed at one end of the rear end cover 54 in a radial direction, and communicates with the third-stage portion 5413 of the class shaft hole 541. The second oil passage 543 is a class blind hole, and is axially formed on the rear end cover 54. The first oil passage 542 is connected to the first oil passage 542. The adjusting hole 545 is formed radially on the rear end cover 54 and communicates with the first oil passage 542 at one end. The other end is provided with an adjusting member 546 (conventional member) for locking. The cross section of the first oil passage 542 is adjusted.

The oil passage pipe member 55 is disposed in the receiving hole 522 of the oil storage cylinder body 52, and one end is locked with the front end cover 53. The other end includes a third oil passage 551 and an oil inlet hole 552. The third oil passage 551 is axially formed at one end of the oil passage pipe member 55 and is a class blind hole corresponding to the position of the second oil passage 543 of the rear end cover 54, and the oil inlet hole 552 is formed radially in the oil. The pipe fitting 55 has one end communicating with the third oil passage 551 and the other end communicating with the oil injection hole 523 of the oil storage cylinder body 52.

The plug seat 56 is disposed in the shaft hole 541 and includes a plug hole 561, a limiting rib 562, and a ring 563. The axial hole of the plug hole 561 is formed in the plug seat 56 and is open at both ends, and the limiting rib 562 is formed at one end of the plug hole 561 along the inner diameter surface of the plug hole 561. In addition, the ring 563 is convexly formed on the outer surface of the plug seat 56, so that one end of the plug seat 56 is sleeved on the third stage portion 5413 of the class shaft hole 541, and is attached to the second stage of the class shaft hole 541 by the ring wing 563. The class of the 5412.

The cover 57 has an alcove 571 and a plurality of perforations 572, and each of the perforations 572 extends through the cover 57 and communicates with the recess 571. The cover 57 is sleeved on one end of the plug seat 56 by the recess 571, and the cross section of the plug seat hole 561 is limited.

The first and second latching groups 58, 58' are respectively received in the plug hole 561 and the second and third oil passages 543 and 551, and include a steel ball 581, 581' and an elastic member 582, 582'. The steel balls 581, 581' can be pushed by the elastic members 582, 582' to selectively close the plug hole 561 and the third oil passage 551.

Therefore, the above is a device for accurately driving the pulsed pneumatic tool according to a preferred embodiment of the present invention, and the components and assembly methods are introduced. Further, the actuation characteristics of the embodiment of the present invention are described as follows: First, referring to Figures 6 and 7, the oil chamber mechanism 5 is connected coaxially with the wind drive mechanism 2 by the end cover 54. When the wind-driven mechanism 2 is pushed by the high-pressure gas introduced from the pressing structure 11 of the main body 10, the coaxial interlocking oil chamber mechanism 5 rotates, so that the hydraulic oil in the elliptical chamber 521 pushes the oil-removing blade of the power shaft mechanism 4 43. Rotating the power shaft 41 of the power shaft mechanism 4 to provide a user with a workpiece locked by the power shaft 41.

At this time, the hydraulic oil pressure in the elliptical chamber 521 is less than the blocking force of the first and second blocking groups 58, 58', so the first blocking group 58 can hold the steel ball 582 against the plug hole 561 by the elastic member 582. Limiting the rib 562 to close the plug hole 561 of the end, and the second latching group 58' can hold the steel ball 582' against the third oil passage 551 by the elastic member 582', and close the third end of the end Oil passage 551 When the power shaft mechanism 4 locks the workpiece to a predetermined torque, the oil chamber mechanism 5 cannot drive the power shaft mechanism 4 to rotate, so that the hydraulic oil pressure in the elliptical chamber 521 can only be pressurized toward the oil injection hole 523. And breaking the blocking ability of the second blocking group 58', so that the pressure of the hydraulic oil passes through the oil filling hole 523, the oil inlet hole 552, the third oil passage 551, and then pushes the second blocking group 58' (the steel ball 581' compresses the elastic member 582 '), to connect the second and third oil passages 543, 551, and continue through the first oil passage 542, enter the third-stage portion 5413 of the rear end cover 54 class shaft hole 541, and press the wind drive mechanism 2 top mast 21 It is axially retracted along the class axis hole 541.

Thus, the other end of the top mast 21 pushes the steel ball 31 of the deflation mechanism 3 to communicate with the air flow passage 32 and the vent hole 33, so that the high pressure gas introduced by the pressing structure 11 enters the wind drive mechanism 2, that is, directly along the fan Leaf shaft 22 through air flow passage 32 is deflated by the venting opening 33 and does not drive the wind urging mechanism 2 to actuate. (skills)

When the press-fitting structure 11 no longer introduces high-pressure gas to the wind-driven mechanism 2, the oil chamber mechanism 5 is no longer synchronously rotated, so that the hydraulic oil pressure in the elliptical chamber 521 is reduced. At this time, the deflation mechanism 3 re-closes the air flow path 32 (disconnects the air flow path 32 and the bleed hole 33) by pushing the steel ball 31 due to the return of the elastic member 34. (skills)

The top mast 21 of the wind drive mechanism 2 is pushed up by the elastic member 23 to return to the top stopper seat 56, and the end plug hole 561 is closed. And when the top mast 21 of the wind drive mechanism 2 is returned, the hydraulic oil in the third-stage portion 5413 of the class shaft hole 541 is compressed, so that the hydraulic oil is pushed respectively to the first and second blocking groups, wherein the second blocking group is again The third oil passage 551 is closed, and the first lock group 58 is pressed by the hydraulic oil of the third-stage portion 5413 to lose the locking ability, so that the hydraulic oil of the third-stage portion 5413 can be perforated 572 from the plug hole 561 through the cover 57. Return to the elliptical chamber 521.

As described above, the hydraulic oil in the first, second, and third oil passages 542, 543, 551 and the third-stage portion 5413 is blocked by the first and second lock groups 58, 58' and one end of the top mast 21, respectively. Maintaining a preset pressure, as long as the power shaft mechanism 4 is actuated to a predetermined torque, the hydraulic oil in the elliptical chamber 521 of the oil chamber mechanism 5 will move toward the oil injection hole 523 due to the pressure. At this time, as described above. The quick and timely linkage of the deflation mechanism 3 to form a deflation, to achieve accurate load-bearing power, without the need for conventional techniques to have an occasional pressure reserve, in order to respond to the lack of deflation.

The above description is only a preferred embodiment of the present invention. The features of the present invention are intended to be illustrative, and not to limit the scope of the embodiments of the present invention. The scope of the invention is covered.

1‧‧‧ pneumatic tools

11‧‧‧ Pressing structure

10‧‧‧ Subject

Claims (6)

The utility model relates to a device for accurately pulsing a pneumatic power tool, which is provided in the pulsed pneumatic tool, which comprises: an oil chamber cylinder having an axially through receiving space; an oil storage cylinder body, the system is placed In the accommodating space, the oil storage cylinder body is axially inserted with an elliptical chamber and an accommodating hole which are open at both ends, and at least one oil hole is connected in the radial direction to connect the elliptical chamber and the accommodating hole a front end cover is disposed at a front end of the accommodating space to limit the accommodating space and a cross section of the front end of the elliptical chamber; a rear end cover is disposed at a rear end of the accommodating space to limit the accommodating space and a cross section of the rear end of the elliptical chamber, and the rear end cover is axially penetrated with a class of shaft holes, and the rear end cover is respectively provided with a first oil passage and a second oil passage in a radial direction and an axial direction. An oil passage is connected to the class shaft hole and the second oil passage; an oil passage pipe member is disposed in the receiving hole, and a third oil passage is axially disposed at one end of the oil passage pipe member, and the third oil passage position is Corresponding to the second oil passage, the oil passage pipe member is provided with at least one oil inlet hole in the radial direction, and the oil inlet hole The third oil passage is connected to the oil injection hole; a plug seat having a plug hole formed in the axial shaft of the plug seat, the plug seat being sleeved in the third step portion of the class shaft hole; a cover and a cover Cooperating with one end of the plug seat to limit a cross section of one end of the plug hole, and the cover is axially penetrating through a plurality of perforations; a first blocking group is disposed in the plug hole, and selectively closes a cross section of one end of the plug hole; and a second blocking group is disposed between the second and the third oil path, and The section of the third oil passage is selectively closed. The device for accurately charging a pulsed pneumatic tool according to claim 1, wherein the second oil passage is a class blind hole. The device of claim 1, wherein the rear end cover is further provided with an adjusting hole in a radial direction, the adjusting hole is connected to the first oil path at one end, and the other end is provided with a The adjusting member is locked, and the cross section of the first oil passage can be selectively adjusted. The device of claim 1, wherein the first and the second blocking groups respectively comprise a steel ball and an elastic element. The device of claim 1, wherein the inner surface of one end of the plug hole is provided with a limiting rib. The device of claim 1, wherein the outer surface ring of the plug seat is provided with a ring wing, and the ring wing is attached to the second class of the class shaft hole. surface.