TWI460056B - Pulsed pneumatic tool for reducing the starting load - Google Patents

Description

Pulsed pneumatic tool for reducing the starting load

The present invention relates to the technical field of pneumatic tools, and more particularly to a device for reducing the starting load of a pulsed pneumatic tool that can reduce the starting load at the time of starting.

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. Conventional pneumatic tools are attached to the body of pneumatic tools with a hand grip. Holder, 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 various 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, the oil chamber mechanism connected to the front end is coaxially coupled, and the power shaft mechanism is rotated to achieve the lock. Set the purpose of the workpiece.

The problem faced by the conventional pneumatic tool is that the high pressure gas can be sent to the wind drive mechanism and the oil chamber mechanism and the power shaft mechanism are coaxially connected by the pressing mechanism as the intake air control, but when the power shaft mechanism is stationary The moment to the start of rotation, the maximum static friction (reaction force). In order to match and break through the reaction of this start, the oil chamber mechanism and the wind drive mechanism force the institution not to The increase in the break is increased, or the structural strength is increased so that it can withstand this reaction force multiple times. In addition to causing an increase in cost and volume, it also causes waste of energy and loss of related parts.

Therefore, if the pressure in the oil chamber mechanism, such as the total amount of hydraulic oil or the area of the active member surface, can be adjusted at the time of starting, this deficiency can be improved.

In view of the problems and deficiencies of the above-mentioned prior art, the main object of the present invention is to provide a device for pulsing a pneumatic tool to reduce the starting load. When the pulsed pneumatic tool is started, the pressure is automatically changed according to the pressure, and the self-regulation is reduced. The loader.

According to the above object of the present invention, a device for reducing a starting load of a pulsed pneumatic tool is provided, which is disposed in an oil chamber mechanism of the pulsed pneumatic tool, and includes an oil chamber cylinder, an oil storage cylinder body and a rear end cover. And a blocking group. The oil storage cylinder body is disposed in the accommodating space of the oil chamber cylinder, and has an elliptical chamber and a accommodating hole in the axial direction, and at least one oil spill hole connecting the elliptical chamber and the accommodating hole in the radial direction . The rear end cover is disposed on the oil chamber cylinder to limit the cross section of the oil chamber cylinder and the elliptical chamber at one end, and is provided with a class of shaft holes in the axial direction, and a connecting shaft hole corresponding to the accommodating hole position. The first oil road. The blocking group is disposed in the receiving hole and is subjected to hydraulic oil pressure in the elliptical housing to selectively close the oil spill hole. With the composition of the above components, the hydraulic oil in the elliptical volume chamber is driven by the pressure, and the optional oil spill hole overflows into the accommodating hole to adjust the oval chamber. The pressure of the hydraulic oil reduces the kinetic energy required for the pulsed pneumatic tool to start.

1‧‧‧pulse pneumatic tools

11‧‧‧ Pressing structure

12‧‧‧ airway

10‧‧‧ Subject

2‧‧‧Wind drive agency

3‧‧‧Dissipation mechanism

4‧‧‧Power shaft mechanism

5‧‧‧ Oil room agency

51‧‧‧ oil chamber cylinder

511‧‧‧ front end cover

52‧‧‧ oil storage cylinder

521‧‧‧Oval room

522‧‧‧ accommodating holes

523‧‧‧ oil spill hole

53‧‧‧Back end cover

531‧‧‧Class shaft hole

532‧‧‧First oil road

533‧‧‧Second oil road

54‧‧‧Locking group

541‧‧‧ casing

542‧‧‧Flexible components

543‧‧‧ push block

5431‧‧‧ Socket

5432‧‧‧ Groove

1 is a schematic view of an embodiment of a device for reducing a starting load of a pulsed pneumatic tool of the present invention.

Figure 2 is an exploded perspective view of an embodiment of a device for mitigating a starting load of a pulsed pneumatic tool of the present invention.

Fig. 3 is a cross-sectional view showing the first embodiment of the apparatus for mitigating the starting load of the pulsed pneumatic tool of the present invention.

Fig. 4 is a schematic exploded view of an embodiment of the apparatus for mitigating a starting load of the pulsed pneumatic tool of the present invention.

Fig. 5 is a cross-sectional view showing the second embodiment of the apparatus for mitigating the starting load of the pulsed pneumatic tool of the present invention.

Fig. 6 is a cross-sectional view showing the third embodiment of the apparatus for mitigating the starting load of the pulsed pneumatic tool of the present invention.

Figure 7 is a cross-sectional view of a fourth embodiment of the apparatus for mitigating the starting load of the pulsed pneumatic tool of the present invention.

Hereinafter, an embodiment of the apparatus for mitigating the starting load of 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.

Please refer to Figures 1 to 5 for pulsed pneumatic tools 1 The component mechanism is generally included in a main body 10, and is 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. (known skills, as shown in Figures 1 and 3)

The device for reducing the starting load of the pulse type 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 rear end cover 53 and a lock group 54. (As shown in Figures 2~4).

The oil chamber cylinder 51 has an axially permeable receiving space, and a front end cover 511 is received at the front end of the accommodating space. (skills)

The oil storage cylinder 52 is placed in the accommodating space of the oil chamber cylinder 51 and abuts against the front end cover 511. The utility model comprises an elliptical chamber 521, a receiving hole 522 and at least one oil spill hole 523. The elliptical chamber 521 is formed in the axial direction through the oil storage cylinder 52, and both ends are open. The receiving hole 522 is axially formed at one end of the oil storage cylinder body 52 and is a blind hole. In addition, the oil spill hole 523 communicates with the elliptical volume chamber 521 and the accommodation hole 522 formed in the oil storage cylinder body 52.

The rear end cover 53 is disposed in the oil chamber cylinder 51 to restrict a cross section of the oil storage cylinder 52 and the rear end of the elliptical chamber 521. The rear end cover 53 has a first shaft hole 531, a first oil passage 532 and a second oil passage 533. Class shaft hole 531 The axial direction is formed through the rear end cover 53. The first oil passage 532 is connected to the shaft hole 531 and corresponds to the position of the accommodating hole 522, and is formed at the rear end cover 53. Further, the second oil passage 533 is formed on the abutting surface of the rear end cover 53 and communicates with the shaft hole 531 and the first oil passage 532. When implemented, the second oil passage 533 can be selectively omitted.

The latching group 54 is disposed in the receiving hole 522 and includes a sleeve 541, an elastic member 542 and a push block 543. The sleeve 541 is received in the receiving hole 522, and partially closes the cross section of the oil spill hole 523. The elastic member 542 extends through the sleeve 541, and one end abuts against the bottom of the receiving hole 522, and the other end pushes the pushing block 543. The push block 543 is movably disposed on the receiving hole 522, and the outer surface thereof is formed to simulate the inner diameter of the receiving hole 522, and the partial cross section of the oil spill hole 523 can be selectively sealed. One end of the push block 543 has a sleeve portion 5431 having an outer diameter slightly smaller than the inner diameter of the sleeve 541, and a groove 5432 is formed in the sleeve portion 5431 so that the groove 5432 can selectively overflow with the oil storage cylinder 52. The oil hole 523 corresponds to the position.

Therefore, the above is a device for providing a pulse-type pneumatic tool for reducing the starting load, the components of each part and the assembly method. The operating characteristics of the embodiment of the present invention are as follows: First, the oil chamber The rear end cover 53 of the mechanism 5 is connected to the wind drive mechanism 2. 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 synchronous 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 41 interlocking the power shaft 42 to rotate, providing the user with the power shaft 41 to lock the workpiece.

In general, when the oil chamber mechanism 5 rotates to push the oil-removing blade In order to drive the power shaft 42, it is necessary to provide an instantaneous maximum static friction force greater than the rotational starting of the power shaft mechanism 4 to drive the power shaft mechanism 4 to rotate. When the oil chamber mechanism 5 starts to rotate, the reaction force of the power shaft mechanism 4 is also the largest (the maximum starting load). At this time, the hydraulic oil in the elliptical chamber 521 will automatically face the oil spill hole 523 and the first pressure. The first and second oil passages 532, 533 are extruded (as shown in Figs. 6 and 7), and the pusher block 543 compresses the elastic member 542, thereby overflowing the hydraulic oil to reduce the initial rotation of the oil chamber mechanism 5. It is necessary to withstand the reaction force of the power shaft mechanism 4 (reducing the starting load).

Thus, after several rotation cycles, the oil chamber mechanism 5 and the power shaft mechanism 4 are filled with hydraulic oil due to the interaction momentum, and the hydraulic oil in the elliptical chamber 521 is pushed by the pressure. Part of the first and second oil passages 532, 533 accumulate and push the push block 543 to compress the elastic member 542, thereby pushing the block 543 to selectively close the oil spill hole 523, ensuring that the pressure can be maintained in the elliptical chamber. In 521, it does not leak out of the oil spill hole 523.

As described above, when the oil chamber mechanism 5 is started, the hydraulic oil in the elliptical chamber 521 can enter the recess 5432 of the push block 543 through the oil spill hole 523 in time, and push the push block 543, and moderately The hydraulic oil pressure in the elliptical chamber 521 is released and released thereby reducing the starting load. After the operation is stabilized, the hydraulic oil pressure in the elliptical chamber 521 is automatically caused to cause the lock group 54 to close the oil spill hole 523.

The above description is only for the preferred embodiment of the present invention, and is intended to clarify the features of the present invention, and is not intended to limit the scope of the embodiments of the present invention. Modifications, as well as variations well known to those skilled in the art, are still within the scope of the invention.

511‧‧‧ front end cover

52‧‧‧ oil storage cylinder

521‧‧‧Oval room

522‧‧‧ accommodating holes

523‧‧‧ oil spill hole

53‧‧‧Back end cover

531‧‧‧Class shaft hole

532‧‧‧First oil road

533‧‧‧Second oil road

54‧‧‧Locking group

541‧‧‧ casing

542‧‧‧Flexible components

543‧‧‧ push block

5431‧‧‧ Socket

5432‧‧‧ Groove

Claims (4)

A pulse type pneumatic tool for reducing the starting load is disposed in the pulsed pneumatic tool, comprising: an oil chamber cylinder having an axially permeable receiving space and being disposed at the front end of the accommodating space a front end cover; an oil storage cylinder body is disposed in the accommodating space and abuts against the front end cover, the oil storage cylinder body is axially provided with an elliptical chamber and a receiving hole, and is provided at least in the radial direction An oil spill hole, and the oil spill hole communicates with the elliptical chamber and the accommodating hole; a rear end cover is disposed in the accommodating space to limit a cross section of the elliptical chamber and the rear end of the accommodating space, The rear end cover is axially disposed with a first-class shaft hole, and the first receiving oil hole is provided with a first oil passage connected to the one-stage shaft hole; and a locking group is disposed at the receiving hole, and is received by the ellipse The hydraulic oil pressure in the chamber can selectively close the oil spill hole. The pulsing pneumatic tool of claim 1, wherein the rear end cover further comprises a second oil passage connecting the class shaft hole and the first oil passage, the second oil passage Formed on the mating surface of the rear end cover. The device of claim 1, wherein the blocking group comprises a sleeve, an elastic member and a push block; the sleeve is received in the receiving hole, and Partially closing the cross section of the oil spill hole; after the elastic component penetrates the sleeve, one end abuts against the bottom of the accommodating hole, and the other end pushes the push block; and the push block is displaceably disposed in the accommodating hole And choose Optionally, the section of the oil spill hole is partially closed, and one end of the push block has a set of segments slightly smaller than the inner diameter of the sleeve, and a groove is formed in the sleeve ring, so that the groove is selectively Corresponds to the position of the oil spill hole. The pulsing pneumatic tool of claim 3, wherein the outer surface of the push block is formed to mimic the inner diameter of the accommodating hole.