TWI760045B - Pulsed Pneumatic Tool Power Unloader - Google Patents

Abstract

A pulse-type pneumatic tool power unloading device, comprising a main body, which is provided with a wind drive mechanism, a degassing mechanism, a power shaft mechanism and an oil chamber mechanism; the wind drive mechanism is driven by the introduced high-pressure gas to rotate and drive in a continuous manner. Rotate the oil chamber mechanism, the oil chamber mechanism drives and rotates the power shaft mechanism, and the power shaft mechanism drives a hydraulic shaft to rotate to lock the workpiece; a first locking group is set in the oil chamber mechanism, and the first locking The set includes a piston member and a spring, the piston member is arranged at one end of a plug seat of the oil chamber mechanism that is different from the oil drain mechanism, the spring is arranged at the end of the shaft of the hydraulic shaft, and the spring pushes the piston elastically The fitting is tightly contacted with the end wall of the plug seat, so as to block the plug seat hole of the plug seat. When the hydraulic shaft and the power shaft mechanism reach the torque setting value, the oil chamber mechanism triggers the air release mechanism to discharge The high pressure gas stops the wind drive mechanism.

Description

Pulsed Pneumatic Tool Power Unloader

The present invention relates to a pneumatic tool, in particular to a pulse-type pneumatic tool power unloading device which can unload power instantly and quickly.

Conventional pneumatic tools use a high-pressure air source for rotational motion, and are used in work situations such as drilling, locking or releasing bolts or nuts. The conventional pneumatic tool generally controls the high-pressure gas to enter the inside of the pneumatic tool body by the withholding mechanism, thereby driving a wind drive mechanism to rotate. The front end of the power shaft mechanism can be connected with various tool heads to rotate, so as to achieve the purpose of drilling, locking or releasing the workpiece.

When the power shaft mechanism locks the workpiece to the torque setting value, the air release device should be triggered to stop the air tool in time. The patent document TWI460055 discloses the related prior art. The pulsed pneumatic tool includes an air drive mechanism, a deflation mechanism and an oil chamber mechanism. 1 and 2, the oil chamber mechanism generally includes an oil chamber cylinder 10, an oil storage cylinder 11, an oil pipe fitting 12, a plug seat 14, a cover 15, a first locking group 16, a first Two locking groups 17 . The oil storage cylinder 11 is accommodated in the oil chamber cylinder 10 . The front end cover (not shown) and the rear end cover 18 are respectively provided with both ends of the oil storage cylinder 11 . The oil passage pipe 12 is accommodated in the oil storage cylinder 11 and has a third oil passage 121 and an oil injection hole 122 . The first locking group 16 is accommodated in the stage shaft hole 181 in cooperation with the plug seat 14 . The second blocking group 17 is disposed between the second oil passage 183 and the third oil passage 121 . The first oil passage 182 is provided with an adjusting member 184 for adjusting the size of the oil passage.

Through the synergy of the first oil passage 182 , the second oil passage 183 , the third oil passage 121 , the jacking lever 191 , the plug seat 14 , and the first locking group 16 and the second locking group 17 , the hydraulic oil is The change of the flow direction as shown by the arrow in the oil chamber mechanism, especially the hydraulic flow in Figure 2, will cause the deflation mechanism to deflate, the air pressure will no longer drive the wind drive mechanism to act, and the power shaft will stop rotating, achieving precise unloading of the wind drive mechanism. purpose of power.

Improvements to the above prior art include the first latch group 16 and the adjustment member 184 .

The first lock group 16 is composed of steel balls and springs, but the contact area between the steel balls and the orifice of the plug seat 14 is too small, and the orifice is not closed tightly enough, and it is easy to have the problem of oil leakage, so that the stopper head 19 is pushed up. Insufficient oil pressure on the jacking lever 191 affects the immediate feedback capability of the deflation mechanism, and the immediate response of the unloading power may be delayed accordingly. In addition, the spring and the steel ball are in the plug seat 14, so the cover 15 and the oil hole on it need to be additionally provided, and the elastic force of the spring and the oil pressure may push the cover 15 open, thus affecting the cover 15 and the plug seat. 14 tightness, which leads to the problem of oil leakage from the gap between the two.

Regarding the adjusting member 184, although it has the purpose of allowing the user to adjust the size of the first oil passage 182, it is expected to affect the oil pressure of the jacking head 19 and the jacking lever 191, and to change the feedback immediacy of the deflation mechanism. However, it is not easy for the user to control the operation of the adjusting member 184, and the effect and immediacy of unloading the power are not as expected by arbitrarily operating the adjusting member 184, which makes the user mistakenly think that the pneumatic tool is damaged.

Based on the above problems, the present invention sets out to improve the power unloading device, so as to improve the accuracy and instant response of power unloading.

The technical features of the present invention are as follows: a pulse-type pneumatic tool power unloading device, comprising a main body, which is provided with a wind drive mechanism, a degassing mechanism, a power shaft mechanism and an oil chamber mechanism; The wind-driven mechanism is driven and rotated by the high-pressure gas introduced from a snap structure provided on the main body, and drives the oil chamber mechanism; the oil chamber mechanism drives the power shaft mechanism, and the power shaft mechanism drives an oil Press the rotating shaft to lock the workpiece; when the hydraulic rotating shaft and the power shaft mechanism reach the torque setting value, the oil chamber mechanism triggers the air release mechanism to release high-pressure gas, so that the wind drive mechanism stops, the oil chamber mechanism, the power shaft mechanism The mechanism and the hydraulic shaft stop rotating; a first locking group is set in the oil chamber mechanism. When the power shaft mechanism reaches the torque setting value, the pressure of the hydraulic oil in the oil chamber mechanism forces the first locking group to lock a A plug seat hole of the plug seat, the hydraulic oil in the oil chamber mechanism presses the air release mechanism through a first oil circuit and a second oil circuit, so that the air release mechanism discharges high-pressure gas; when the wind drive mechanism stops , the reverse pressure of the hydraulic oil forces the first blocking group to withdraw from the plug seat, and the hydraulic oil returns to the oil chamber mechanism through the gap between the plug seat and the first blocking group; it is characterized in that:

The first locking group includes a piston member and a spring, the piston member is arranged at one end of the plug seat that is different from the oil drain mechanism, the spring is arranged at the shaft end of the hydraulic shaft, and the spring elastically pushes the piston member , making it closely contact with the end wall of the plug seat, so as to lock the plug seat hole of the plug seat.

Purpose of the present invention effect:

The invention improves the piston member of the first locking group, so that the enlarged locking portion can be tightly abutted with the end wall of the plug seat, so that the piston member has sufficient contact area and complete tightness when locking the plug seat, avoiding the need for The problem of oil leakage occurs when the piston member locks the plug seat. When the hydraulic shaft of the power shaft mechanism locks the workpiece to a preset torque, the increased oil pressure is enough to immediately open the jack and the lever of the pressure relief mechanism, and the relief mechanism immediately feedbacks the pressure to relieve pressure. The pneumatic tool immediately unloads the pneumatic power, and the hydraulic shaft stops rotating immediately.

The invention also improves the spring of the first locking group, and relocates it to the end of the hydraulic shaft so that the elastic force of the spring can be concentratedly applied to the piston member to push the force of the piston member to block the end wall of the plug seat and improve its blocking ability.

In the present invention, the first oil circuit and the second oil circuit are not provided with any adjustment member for the user to adjust the size of the oil circuit, so that the blocking and communication of the first oil circuit, the second oil circuit and the third oil circuit are completely controlled by the first oil circuit. It is controlled by the second blocking component, which ensures that the second blocking group can open or block the third oil circuit, and make an instant response completely according to the oil pressure state of the oil chamber mechanism; when the hydraulic shaft of the power shaft mechanism locks the workpiece due to When the hydraulic oil pressure of the oil chamber mechanism increases to a preset torque, the second locking group can be pushed open immediately, the third oil circuit and the second oil circuit can be opened, so that the hydraulic oil can pass through the first oil circuit instantly. Flow into the stepped shaft hole, immediately open the top stopper head and stopper rod of the pressure relief mechanism, and the relief mechanism immediately feedbacks pressure relief and stops the rotation of the hydraulic shaft.

<Prior Art>

10: Oil chamber cylinder

11: Oil storage cylinder

12: Oil Pipe Fittings

121: The third oil circuit

122: Oil filling hole

14: Plug seat

15: Cover

16: The first blocking group

17: The second blocking group

18: Rear end cover

181: Class shaft hole

182: The first oil circuit

183: Second oil circuit

184: Adjustment piece

19: top switch

191: top lever

<The present invention>

2: Oil chamber mechanism

4: Subject

5: Wind drive mechanism

6: Air deflation mechanism

7: Power shaft mechanism

20: Oil chamber cylinder

21: Oil storage cylinder

22: Oil Pipe Fittings

221: The third oil circuit

222: Oil filling hole

24: Plug seat

241: Plug seat hole

26: The second blocking group

261: Beads

262: Spring

27: Front cover

28: Rear end cover

281: stepped shaft hole

282: The first oil circuit

283: Second oil circuit

30: The first blocking group

31: Piston parts

311: Locking part

312: Piston shaft

313: Socket

32: Spring

41: Snap structure

51: top switch

52: Spring

53: top lever

61: Ball beads

62: Spring

71: Hydraulic shaft

711: Shaft end

72: Oil transfer blade

[FIG. 1] A partial cross-sectional view of the oil chamber mechanism of the prior art pneumatic tool power unloading device and one of the schematic diagrams of the oil circuit.

[Fig. 2] A partial cross-sectional view of the oil chamber mechanism of the prior art pneumatic tool power unloading device and the second schematic diagram of the oil circuit.

[FIG. 3] A cross-sectional view of the pneumatic tool and the power unloader of the present invention.

[FIG. 4] A partial perspective sectional view of the power unloader of the present invention.

[Fig. 5] An exploded view of the power unloader of the present invention.

[Fig. 6] One of the schematic diagrams of the cross-section and the oil circuit of the power unloading device of the present invention.

[Fig. 7] Section 2 and schematic diagram of the oil circuit of the power unloading device of the present invention.

In order to facilitate the description of the central idea of the present invention expressed in the column of the above-mentioned summary of the invention, specific embodiments are hereby expressed. Various objects in the embodiments are drawn according to proportions, sizes, deformations or displacements suitable for description, rather than the proportions of actual elements, which will be described first. In the following description, identical and symmetrically arranged elements are denoted by the same reference numerals.

As shown in FIG. 3 , the pulsed pneumatic tool of the present invention generally includes a main body 4 , and the main body 4 is provided with a wind drive mechanism 5 , a deflation mechanism 6 , a power shaft mechanism 7 and an oil chamber mechanism 2 . The wind drive mechanism 5 is pushed and rotated by the high pressure gas introduced from the air inlet by the snap structure 41 provided on the main body 4 , and the two ends of the wind drive mechanism 5 are respectively connected with the air release mechanism 6 and the oil chamber mechanism 2 ; the oil chamber mechanism 2 The front end is connected to the power shaft mechanism 7, and a hydraulic shaft 71 is rotated through the power shaft mechanism 7 to lock the workpiece (not shown in the figure). 2 is triggered and deflated, so that the wind drive mechanism 5 stops driving the oil chamber mechanism.

As shown in FIG. 3 to FIG. 6 , the oil chamber mechanism generally includes an oil chamber cylinder 20 , an oil storage cylinder 21 , an oil pipe fitting 22 , a plug seat 24 , a first locking group 30 , and a second locking group 26 .

The oil storage cylinder 21 is accommodated in the oil chamber cylinder 20 , and the front end cover 27 and the rear end cover 28 are respectively provided with two ends of the oil storage cylinder 21 . The rear end cover 28 has a stepped shaft hole 281 and a first oil passage 282 and a second oil passage 283; the first oil passage 282 and the second oil passage 283 are not provided with any adjusting member for adjusting the size of the oil passage, in other words, The first oil passage 282 and the second oil passage 283 are always in barrier-free communication. The oil pipe fitting 22 is accommodated in the oil storage cylinder 21 , and includes a third oil passage 221 and an oil injection hole 222 therein. The second locking group 26 includes a ball body 261 and a spring 262. The second locking group 26 is disposed between the second oil passage 283 and the third oil passage 221. The elastic force of the spring 262 makes the ball body 261 lock the third oil passage 262. Oil circuit 221.

The first locking group 30 includes a piston member 31 and a spring 32. The piston member 31 is disposed in the stepped shaft hole 281 of the rear end cover 28 and corresponds to the end wall of the plug seat 24. The spring 32 is disposed in the oil Press the shaft end 711 of the rotating shaft 71 , the shaft end 711 extends into the stepped shaft hole 281 of the end cover 28 , the spring 32 elastically pushes the piston member 31 to make it tightly abut against the end wall of the plug seat 24 , The plug seat 24 is locked. Further, the piston member 31 includes a locking portion 311 abutting against the end wall of the plug seat 24, a piston shaft 312 extending from the center of the locking portion 311 to the plug seat hole 241 of the plug seat 24, and a piston shaft 312 extending from the center of the locking portion 311 to the plug seat hole 241 of the plug seat 24. The center of the locking portion 311 protrudes from the socket portion 313 for the spring 32 to be socketed.

As shown in FIGS. 3 , 6 and 7 , the hydraulic oil in the first oil passage 282 , the second oil passage 283 , the third oil passage 221 and the stepped shaft hole 281 are respectively blocked by the first locking group 30 to the plug seat 24 , The second blocking group 26 blocks the third oil passage 221 , and the jacking head 51 blocks the plug seat 24 and other components to maintain a predetermined pressure. When the wind drive mechanism 5 is pushed by the high pressure gas introduced by the snap structure 41 provided on the main body 4, the coaxially linked oil chamber mechanism 2 rotates, so that the rotary motion of the oil chamber mechanism 2 pushes the oil-discharging blade 72 of the power shaft mechanism 7 , to rotate the hydraulic shaft 71 of the power shaft mechanism 7 to lock the workpiece. At this time, the hydraulic oil pressure in the oil storage cylinder 21 is not as strong as the locking force of the first locking group 30 and the second locking group 26, so the first locking group 30 still closes the plug seat hole 241, and the second locking group 26 The third oil circuit 221 is still closed.

However, when the power shaft mechanism 7 locks the workpiece to a preset torque, the oil chamber mechanism 2 cannot drive the power shaft mechanism 7 to rotate, so that the pressure of the hydraulic oil in the oil storage cylinder 21 increases and pressurizes toward the oil filling hole 222, The blocking ability of the second blocking group 26 is broken, so that the pressure of the hydraulic oil pushes the second blocking group 26 open and enters the second oil circuit 283 after passing through the oil injection hole 222 and the third oil circuit 221, and then passes through the first oil circuit 282. , enter the stepped shaft hole 281 of the rear end cover 28, and press the top catch 51 of the wind drive mechanism 5 to retreat axially to compress the spring 52 behind it. The retracted jacking head 51 moves the jacking lever 53 to retreat, and pushes open the ball 61 of the deflation mechanism 6, so that the high-pressure gas introduced by the snap mechanism 41 enters the wind drive mechanism 5, and is directly deflated by the deflation mechanism 6 instead of no longer. The wind drive mechanism 5 is actuated.

When the pressing structure 41 no longer introduces high-pressure gas into the wind drive mechanism 5, the oil chamber mechanism 2 no longer Synchronous rotation, so the hydraulic oil pressure in the oil storage cylinder 21 will decrease accordingly. At this time, the deflation mechanism 6 pushes the ball 61 to reset due to the recovery of the elastic element 62 . The top stopper 51 (and the top stopper rod 53 ) of the wind drive mechanism 5 is pushed back by the spring 52 to return to the stopper seat 24 and closes the plug seat hole 241 ; the top stopper 51 of the wind drive mechanism 5 When the jacking lever 53 returns to its original position, it will compress the hydraulic oil in the stepped shaft hole 281, so that the hydraulic oil pushes the first locking group 30 and the second locking group 26 respectively, wherein the second locking group 26 closes the third locking group again. The oil passage 221, and the piston member 31 of the first locking group 30 is pushed open by the oil pressure of the stepped shaft hole 281, the locking portion 311 is separated from the end wall of the plug seat 24, and the hydraulic oil must flow from the piston shaft 312 The gap with the plug seat hole 241 and the gap between the blocking portion 311 and the end wall of the plug seat 24 return to the oil storage cylinder 21 .

20: Oil chamber cylinder

21: Oil storage cylinder

22: Oil Pipe Fittings

221: The third oil circuit

222: Oil filling hole

24: Plug seat

241: Plug seat hole

26: The second blocking group

261: Beads

262: Spring

28: Rear end cover

281: stepped shaft hole

282: The first oil circuit

283: Second oil circuit

31: Piston parts

311: Locking part

312: Piston shaft

313: Socket

32: Spring

51: top switch

52: Spring

53: top lever

711: Shaft end

72: Oil transfer blade

Claims (5)

A pulse-type pneumatic tool power unloading device, comprising a main body, which is provided with a wind drive mechanism, a gas release mechanism, a power shaft mechanism and an oil chamber mechanism; the wind drive mechanism is provided with a press buckle structure of the main body. The introduced high-pressure gas pushes and rotates the oil chamber mechanism; the oil chamber mechanism drives and rotates the power shaft mechanism, and the power shaft mechanism drives a hydraulic shaft to rotate and lock the workpiece; the hydraulic shaft and the power When the shaft mechanism reaches the torque setting value, the oil chamber mechanism triggers the air release mechanism to release high-pressure gas, so that the wind drive mechanism stops, and the oil chamber mechanism, the power shaft mechanism and the hydraulic shaft stop rotating; the oil chamber mechanism A first locking group is provided, when the power shaft mechanism reaches the torque setting value, the pressure of the hydraulic oil in the oil chamber mechanism forces the first locking group to lock a plug seat hole of a plug seat, and the hydraulic oil in the oil chamber mechanism The hydraulic oil presses the air release mechanism through a first oil circuit and a second oil circuit, so that the air release mechanism releases high-pressure gas; when the wind drive mechanism stops, the reverse pressure of the hydraulic oil forces the first blocking group When withdrawing from the plug seat, the hydraulic oil returns to the oil chamber mechanism through the gap between the plug seat and the first locking group; it is characterized in that: the first locking group includes a piston member and a spring, and the piston member is arranged on the The plug seat is different from one end of the oil drain mechanism, and has a locking part that is clutched with the end wall of the plug seat. The spring is arranged at the end of the shaft of the hydraulic shaft, and the spring pushes the piston elastically to lock the plug. The end wall of the plug seat is tightly abutted against the end wall, so as to block the plug seat hole of the plug seat. The impulse type pneumatic tool power unloading device as claimed in claim 1, wherein a piston shaft extends from the center of the locking portion to the inside of the plug seat hole. The impulse type pneumatic tool power unloading device as claimed in claim 2, wherein the center of the locking portion protrudes from the socket portion for the spring to be socketed. The pulsed air tool power unloader of claim 1, wherein the first The oil circuit and the second oil circuit are in barrier-free communication. The pulse-type pneumatic tool power unloading device according to claim 1, wherein the first oil circuit does not include components for adjusting the size of the oil circuit.

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