CN200977566Y

CN200977566Y - Pneumatic tool automatic stop device

Info

Publication number: CN200977566Y
Application number: CN 200620160066
Authority: CN
Inventors: 廖裕辉
Original assignee: CHUDAI INDUSTRIAL CORP
Current assignee: CHUDAI INDUSTRIAL CORP
Priority date: 2006-11-24
Filing date: 2006-11-24
Publication date: 2007-11-21
Anticipated expiration: 2016-11-24

Abstract

The utility model discloses an automatic stopping device for pneumatic tools, which relates to an automatic stopping device for pneumatic tools which can automatically release pressure and stop rotation when a torque setting is reached. The pneumatic tool is provided with a fan blade structure in a main body, and a base and an oil chamber structure are provided at both ends of the fan blade structure, wherein a top lever pushed by the oil chamber structure is provided in the center of the fan blade structure, and a steel ball is supported on the other end of the top lever inside the base, and the steel ball pushes against a piston through an elastic member, the base is connected to an air pressure inlet for pushing the piston, a piston is provided in the base, and an oil storage chamber is provided in the oil chamber structure, and a toggle member which can drive a power shaft is provided in the oil storage chamber. Through the above-mentioned design, when the torque setting value is reached, the oil pressure can push the top lever, forcing the steel ball to shift and perform the first stage of automatic pressure relief, and the piston can be pushed by the air pressure to close the air intake of the fan blade structure, so that the high-pressure gas can be automatically relieved through the piston for the second stage, so as to solve the existing problems of pressure persistence and continuous idling.

Description

The pneumatic tool auto-stopper

Technical field

The utility model relates to a kind of air tool rotation and stops technology, particularly is meant the pneumatic tool auto-stopper that a kind of torsion can stop operating when reaching setting value, to avoid the blade structure continuing spinning.

Background technology

Pneumatic tool is a kind of hand-held tool that utilizes high-pressure air source to be rotated motion, it is applied to widely as boring, locking or release are as occasions such as bolt or nuts, existing pneumatic tool includes a pneumatic tool main body, be provided with hand holding part, air pressure enters the mouth and withholds switch, withhold switch control gases at high pressure and enter pneumatic tool, one base is given the hinge impeller structure, this blade structure is by being promoted to be rotated by gases at high pressure, while and interlock one are located at grease chamber's structure rotation of front end, wherein grease chamber's inside configuration is able to a sheathed power head structure, the available proper implements head of power head structure front end connects to be established, withhold the control that switch is done air inlet by this combination base position cooperation, make gases at high pressure be fed through blade structure, drive in the process that its blade structure rotates at a high speed, grease chamber's structure that the blade structure front end links is able to drive tool heads turn bolt etc. according to this by by the rotation of frictional force transfer motion power header structure;

The problem that aforementioned existing pneumatic tool faced is to be: base position cooperates withholds the control that switch is done air inlet, gases at high pressure are fed through blade structure, grease chamber's structure is able to by by the frictional drive power head structure, but it when torque settings reaches requirement, there is no the structural design of automatic oil pressure behind clamping screw, cause its pressure to renew and the idle running problem that continues, may cause the damage of spare part under long-term the use, not only increase maintenance cost, and shorten its service life.

In view of this, the utility model people is at existing problem that pneumatic tool faces, and by by the research and development of being engaged in related industry for many years and processing experience, actively seek the road that solves, research and development through long-term endeavour, finally success develop a kind of pneumatic tool auto-stopper, by existing pneumatic tool pressure renews and the problem of continuing spinning to overcome.

The utility model content

Therefore, the purpose of this utility model provides a kind of pneumatic tool auto-stopper, so that make pneumatic tool when reaching torque settings, can stop the rotation of dynamic structure.

For this reason, the utility model mainly is to see through following technological means, come specific implementation projects of the present utility model and usefulness: it includes:

One main body, it has a hand holding part and a clinching structure, and is formed with air pressure inlet on the hand holding part, and the clinching structure can be controlled gases at high pressure and enters body interior by the air pressure inlet;

One blade structure, it is located in the main body, can by import by the clinching structure gases at high pressure promote its just, reverse;

One grease chamber's structure, it is located at the blade structure front end in the main body, tie synchronous start for flabellum, and inside has been installed with hydraulic oil;

One power head structure, it is to be located at grease chamber's inside configuration, makes grease chamber's structure can see through the start of hydraulic oil frictional force, and power head structure passes main body one end and can establish tool heads for connecing;

One stop structure, it is the blade structure rear end of being located at main body, it has a locating part, and the locating part center is formed with a containing hole that steel ball is set, main body is formed with one first air leakage hole and one second air leakage hole respectively in corresponding steel ball two ends again, moreover be equipped with in the blade structure one pushing and pressing steel ball top fixed pawl, top fixed pawl end in addition can see through an oil circuit with hydraulic oil promotion when torsion reaches setting value by grease chamber's structure, the main body end that differs from blade structure is provided with a piston again, this piston can intercept pressure-air and enter in the blade structure, and the piston center is formed with the runner of a connection spacing position containing hole and main body first air leakage hole, and also be formed with one in addition passes runner to the piston periphery again, and in intercepting the tap hole that is communicated with second air leakage hole when pressure-air enters blade structure;

By this, see through specifically representing of the utility model aforementioned techniques means, allow pneumatic tool when reaching torque settings, oil pressure is promoted top fixed pawl, force the steel ball displacement and make first section releasing pressure automatically, and piston also must promote for air pressure, and the air inlet of sealing blade structure, make gases at high pressure make second section releasing pressure automatically via piston, and can avoid pneumatic tool pressure to renew problem with continuing spinning, can effectively prolong air tool service life, and can increase its surcharge, and improve the competitiveness and the economic benefit of product.

Next lift a preferred embodiment; and cooperate graphic and figure number; be described further at the utility model; your juror phase can make the utility model is had more detailed understanding; but the following stated person is only for being used for explaining preferred embodiment of the present utility model; be not that attempt is done any pro forma restriction to the utility model according to this; be with; every under creation spirit of the present utility model; and be the modification or the change of any pattern of the utility model, all must belong to the category of the utility model intention protection.

Description of drawings

Fig. 1: be the air tool three-dimensional appearance schematic diagram of the utility model;

Fig. 2: be the air tool generalized section of the utility model;

Fig. 3: be air tool another generalized section of the utility model;

Fig. 3 A: the generalized section that is another embodiment of the utility model pneumatic tool;

Fig. 4: be the utility model pneumatic tool top cross-sectional view;

Fig. 5: the partial cutaway schematic when being the air inlet of the utility model pneumatic tool;

Fig. 6: the sectional schematic diagram that is the utility model pneumatic tool blade structure 6-6 in Fig. 3;

Fig. 7: the schematic diagram that is the utility model pneumatic tool blade structure 7-7 in Fig. 3;

Fig. 8: the perspective exploded view that is the utility model pneumatic tool clinching structure;

Fig. 9: the local section schematic diagram that is the utility model pneumatic tool clinching structure;

Figure 10: the sectional schematic diagram that is the utility model pneumatic tool clinching structure 10-10 in Fig. 9;

Figure 11: the sectional schematic diagram that is the utility model pneumatic tool clinching structure 11-11 in Fig. 9;

Figure 12: be the utility model pneumatic tool clinching structure in Fig. 9 the 11-11 section stir schematic diagram;

Figure 13: the sectional schematic diagram that is the utility model pneumatic tool exhaust action;

Figure 14: the exhaust action sectional schematic diagram that is the utility model pneumatic tool phase I;

Figure 15: the exhaust action sectional schematic diagram that is the utility model pneumatic tool second stage;

Figure 16: be air tool another sectional schematic diagram of the utility model;

Figure 17: the perspective exploded view that is the utility model air tool oil cell structure;

Figure 18: the grease chamber's structure section schematic diagram that is 18-18 among the utility model pneumatic tool Figure 16.

[primary clustering symbol description]

10	Main body	100	The air guide runner
10	Main body	100	The air guide runner	11	Hand holding part	12	Accommodation chamber
13	First air inlet runner	14	Second air inlet runner	11	Hand holding part	12	Accommodation chamber
13	First air inlet runner	14	Second air inlet runner	15	Grate flow channel	16	Base
17	The air pressure outlet	18	The air pressure inlet	15	Grate flow channel	16	Base
17	The air pressure outlet	18	The air pressure inlet	19	First flow	2	Blade structure
20	The flabellum housing	21	First air admission hole	19	First flow	2	Blade structure
20	The flabellum housing	21	First air admission hole	22	Second air admission hole	23	Steam vent
24	The flabellum axostylus axostyle	25	Tank	22	Second air admission hole	23	Steam vent
24	The flabellum axostylus axostyle	25	Tank	26	Blade	27	The track hole
28	Top fixed pawl	3	Stop structure	26	Blade	27	The track hole
28	Top fixed pawl	3	Stop structure	30	Locating part	31	The air pressure runner
32	Second runner	33	Go out flow channel	30	Locating part	31	The air pressure runner
32	Second runner	33	Go out flow channel	34	Containing hole	35	Seal
36	Steel ball	37	Elastic parts	34	Containing hole	35	Seal
36	Steel ball	37	Elastic parts	38	First air leakage hole	39	Second air leakage hole
4	The clinching structure	40	Cylindrical shell	38	First air leakage hole	39	Second air leakage hole
4	The clinching structure	40	Cylindrical shell	400	Steam vent	41	First gas port

42	Second gas port	43	Axostylus axostyle
42	Second gas port	43	Axostylus axostyle	44	Passage	45	Shifting block
46	Last exhaust slot	47	Following exhaust slot	44	Passage	45	Shifting block
46	Last exhaust slot	47	Following exhaust slot	48	Piston rod	49	Pressing buckle piece
50	Piston	51	Protruding axial region	48	Piston rod	49	Pressing buckle piece
50	Piston	51	Protruding axial region	52	Runner	53	Tap hole
54	Seal	6	Grease chamber's structure	52	Runner	53	Tap hole
54	Seal	6	Grease chamber's structure	60	Grease chamber's cylindrical shell	61	Reservoir
62	Hydraulic oil	63	Storage tank	60	Grease chamber's cylindrical shell	61	Reservoir
62	Hydraulic oil	63	Storage tank	64	Oilhole	65	Oil circuit
66	End block	67	Pushing block	64	Oilhole	65	Oil circuit
66	End block	67	Pushing block	7	Power head structure	70	Line shaft
71	Axle bed	72	Register hole	7	Power head structure	70	Line shaft
71	Axle bed	72	Register hole	73	Tool heads	74	Tank
75	Shifting part	76	Locating hole	73	Tool heads	74	Tank
75	Shifting part	76	Locating hole	77	Elastic component	78	The convergent face
8	Adjust structure	80	The oil circuit pipe	77	Elastic component	78	The convergent face
8	Adjust structure	80	The oil circuit pipe	81	Hold oily space	82	Necking section
83	Fuel feed hole	84	The oil passage	81	Hold oily space	82	Necking section
83	Fuel feed hole	84	The oil passage	85	Screw	86	Bolt
88	Adjustment hole			85	Screw	86	Bolt

The specific embodiment

The utility model is a kind of air tool auto-stopper, please disclose referring to Fig. 1, Fig. 2, Fig. 4, it mainly is to be provided with a blade structure 2 in a main body 10, blade structure 2 is to import the start of gases at high pressure institute by the clinching structure 4 of being located at main body 10, and main body 10 and in blade structure 2 two ends be respectively equipped with a grease chamber's structure 6 and a stop structure 3, grease chamber's structure 6 front ends and be provided with a power head structure 7 wherein, supply to see through power head structure 7 turn bolts, and stop structure 3 can stop operating when reaching torque settings;

Detailed formation as for the preferred embodiment of the utility model feature, then be as Fig. 1～shown in Figure 4, this main body 10 is to be rifle shape housing, its vertical section has one for the hand holding part 11 that clinching structure 4 is set, and be formed with an accommodation chamber 12 that can be installed with blade structure 2 in the horizontal segment of main body 10, main body 10 is formed with first air inlet runner 13 and second air inlet runner 14 in accommodation chamber 12 inwalls again, so that just control blade structure 2, reverse, main body 10 is provided with a grate flow channel 15 in addition in accommodation chamber 12 front ends again, for the gases at high pressure after 2 effects of discharging blade structure, moreover main body 10 rear ends lock is provided with a base 16, moreover be provided with an air pressure inlet 18 and air pressure outlet 17 that is communicated with clinching structure 4 in main body 10 hand holding parts 11, and in the main body 10 and be formed with the first flow 19 that is communicated with clinching structure 4 and base 16;

Aforementioned blade structure 2 is to be provided with a flabellum housing 20 in main body 10 accommodation chambers 12, cooperate Fig. 6, shown in Figure 7, these flabellum housing 20 inner edges are formed with elliptoid track hole 27, flabellum housing 20 peripheries are formed with correspondence first respectively, first air admission hole 21 of two air inlet runners 1314 and second air admission hole 22, and flabellum housing 20 front ends also are formed with the steam vent 23 of corresponding aforementioned grate flow channel 15, moreover be provided with a flabellum axostylus axostyle 24 in the flabellum housing 20, flabellum axostylus axostyle 24 peripheries are formed with plural axially extended tank 25, have one can go up respectively in each tank 25, unsteady down blade 26, make blade 26 can cooperate flabellum housing 20 track holes 27 in shape, lower slider, for start grease chamber structure 6, and flabellum axostylus axostyle 24 centers be provided with one can before, the top fixed pawl 28 that slides in the back;

And stop structure 3 is the locating parts 30 that are provided with a contact blade structure 2 in main body 10 bases 16, on this locating part 30 and be formed with one and cooperate base 16 and main body 10 runners, and be communicated with the air pressure runner 31 of the aforementioned first flow 19 and first air inlet runner 13, moreover on the main body 10 and be formed with second runner 32 that is communicated with clinching structure 4 and aforementioned second air inlet runner 14, and on the main body 10 and be formed be communicated with clinching structure 4 and grate flow channel go out flow channel 33, locating part 30 centers are formed with a step shape containing hole 34 that supplies aforementioned top fixed pawl 28 to penetrate again, containing hole 34 inner bottom surfaces are provided with a seal 35, and be provided with a steel ball 36 that can paste in the containing hole 34 to seal 35, this steel ball 36 can be promoted [as Fig. 4 by top fixed pawl 28, shown in Figure 5], moreover steel ball 36 differ from top fixed pawl 28 in addition sides shore an elastic component 37 arranged, this elastic component 37 holds contact that the piston 50 of the protruding axial region 51 of one tool is arranged in addition, this piston 50 can slippage in base 16, moreover piston 50 centers are formed with the runner 52 of a connection containing hole 34 and main body 10 first flows 19, piston 50 is formed with the position of splitter 53 of radial communication runner 52 on protruding axial region 51 again, and aforementioned locating part 30 end faces are provided with a seal 54, so that the path of fitting piston 50 blocking-up locating parts, 30 air pressure runners 31 and main body 10 first flows 19 is [as Fig. 3, Figure 15 and shown in Figure 16], moreover be formed with one first air leakage hole 38 and one second air leakage hole 39 respectively in corresponding steel ball 36 both sides on the main body 10, for pneumatic tool when reaching torque settings, can stop operating automatically first, the two-stage exhaust, and in the main body 10 and be formed with an air guide runner 100 that connects second air leakage hole 39, guidable airflow road 100 can be connected to clinching structure 4[as shown in Figure 3], again or air guide runner 100 also can directly connect main body 10 go out flow channel 33[such as Fig. 3 A], the pressure-air of second stage exhaust can be discharged by main body 10 air pressure outlet 17;

Cooperate in addition referring to Fig. 5, Fig. 8～shown in Figure 10, clinching structure 4 is to go in the air pressure of main body 10 hand holding parts 11, outlet 1817 and first flow 19, second runner, 32 intersections are provided with a hollow cylinder 40, being formed centrally connection air pressure in the cylindrical shell 40 goes into, the passage and the steam vent 400 of outlet 1817, and cylindrical shell 40 peripheries also are formed with corresponding main body 10 first, first of two runners 1932, two gas ports 4142, moreover be equipped with the step shape axostylus axostyle 43 of a hollow in the cylindrical shell 40, be formed with the inner and cylindrical shell 40 first of a rotatable connection on this axostylus axostyle 43, the passage 44 of two gas ports 4142, and axostylus axostyle 43 is formed with a shifting block 45 in an end that passes hand holding part 11, select the passage 44 corresponding first gas port 41[as shown in figure 11 for pulling axostylus axostyle 43] or the second gas port 42[is as shown in figure 12], and cylindrical shell 40 corresponding peripheries be formed with in addition utilize that axostylus axostyle 43 classes sections are communicated with on, following exhaust slot 4647[as shown in figure 10], moreover being provided with the piston rod 48 of a slip in the axostylus axostyle 43, main body 10 root edges also are provided with a pressing buckle piece 49 that can press piston rod 48;

And grease chamber's structure 6 is as Fig. 4 with power head structure 7, Figure 13, Figure 16, Figure 17 and shown in Figure 180, grease chamber's structure 6 is to be provided with a hollow grease chamber cylindrical shell 61 in main body 10, and power head structure 7 is to be located in grease chamber's

cylindrical shell

61, and 61 of power head structure 7 and grease chamber's cylindrical shells are filled with hydraulic oil 62, moreover cylindrical shell 61 outer peripheral edges in grease chamber's are formed with together axially along the storage tank of stretching 63, storage tank 63 has the oilhole 64 that is communicated with space, cylindrical shell 61 inner both sides, grease chamber, moreover grease chamber's

cylindrical shell

61 and 2 of aforementioned blade structures are provided with a co-rotational end block 66, and be formed with the oil circuit 65 that is communicated with storage tank 63 and blade structure 2 top fixed pawls 28 in the end block 66, and oil circuit 65 ends are provided with a pushing block 67 that can promote top fixed pawl 28;

7 of this power head structures are to be provided with line shaft 71 in grease chamber's cylindrical shell 61, these line shaft 71 front ends are formed with a register hole 72, available inserting pulled different tool heads 73[as shown in Figure 1], and line shaft 71 is formed with the tank 74 of two correspondences in grease chamber's cylindrical shell 61 interior one section periphery, two tanks 74 can be respectively equipped with a shifting part 75, and line shaft 70 is formed with plural locating hole 76 between two tanks, 74 root edges, locating hole 76 can be for wearing the elastic component 77 of shoring two shifting parts 75 relatively, moreover two shifting parts, 75 apical margins are formed with a convergent face 78 respectively, when driving 61 rotations of grease chamber's cylindrical shell in order to flabellum axostylus axostyle 24 when blade structure 2, can utilize the frictional force of hydraulic oil in grease chamber's cylindrical shell 61 to drive line shaft 70 rotations, with driven tool 73 a turn bolt etc.;

Moreover be provided with one in the storage tank 63 of aforementioned grease chamber structure 6 and adjust structure 8, this adjustment structure 8 has an oil circuit pipe 80, oil circuit pipe 80 corresponding storage tank 63 oilholes 64 places utilize necking section 82 to be formed with the oily space 81 of an appearance, moreover oil circuit pipe 80 is formed with the fuel feed hole 83 that radially runs through in necking section 82 peripheries, and oil circuit pipe 80 centers are formed with the axial oil passage 84 of a connection fuel feed hole 83, moreover oil circuit pipe 80 front ends are formed with a screw 85, spiral shell is provided with a bolt 86 on the screw 85, and can corresponding be formed at the adjustment hole 88 of main body 10 front ends, stretch into rotating bolt 86 with the fit adjustment instrument by adjustment hole 88, so that adjust the aperture of oil circuit pipe 80 fuel feed holes 83 corresponding storage tank oilholes 64, set torque value in order to adjust;

By this, constitute one and can avoid pressure to renew and the pneumatic tool auto-stopper structure of continuing spinning.

And about practice of the present utility model, then be as Fig. 2～shown in Figure 5, choosing corresponding tool heads 73 is intercalated in the register hole 72 of power head structure 7 line shafts 71, and the demand of complying with need locking or release bolt is pulled the shifting block 45 of clinching structure 4 axostylus axostyles 43, when first gas port 41 of the 44 corresponding cylindrical shells 40 of the passage on the axostylus axostyle 43 [as shown in figure 11], make the pressure-air can be by main body 10 first flows 19, through spacing position 30 air pressure runners 31 and main body 10 first air inlet runner 13[such as Fig. 2, shown in Figure 4], and first air admission hole 21 of blade structure 2 flabellum housings 20 enters in the track hole 27 [as Fig. 4, shown in Figure 6], and driven vane 26 drives 24 rotations of flabellum axostylus axostyle, and the end cap 66 that flabellum axostylus axostyle 24 further drives grease chamber's structure 6 rotates with grease chamber's cylindrical shell 60, and grease chamber's cylindrical shell 60 utilize the frictional force of inner hydraulic oil 62 further drive on the line shaft 70 shifting part 72[as shown in figure 18], make line shaft 70 drive tool heads 73 turn spiral shell spares;

Anti-, when second gas port 42 of the 44 corresponding cylindrical shells 40 of the passage on the axostylus axostyle 43 [as shown in figure 12], make the pressure-air can be respectively by main body 10 second runners 32, through main body 10 second air inlet runner 14[such as Fig. 3, shown in Figure 13] enter in the track hole 27 [as Figure 13 with second air admission hole 22 of blade structure 2 flabellum housings 20, shown in Figure 17], and then driven vane 26 drives flabellum axostylus axostyle 24 backward rotation, and the end cap 66 that flabellum axostylus axostyle 24 further drives grease chamber's structure 6 rotates with grease chamber's cylindrical shell 60, and grease chamber's cylindrical shell 60 utilize the frictional force of inner hydraulic oil 62 further drive on the line shaft 70 shifting part 72[as shown in figure 18], make line shaft 70 oppositely drive tool heads 73 turn spiral shell spares.

And work as pneumatic tool in clamping screw, and when reaching torque settings, then be as Fig. 1～Fig. 4 and Figure 14～shown in Figure 16, because pressure-air continues by main body 10 first flows 19, the air pressure runner 31 and first air inlet runner 13, first air admission hole 21 through flabellum housing 20 continues to enter track hole 27, and through blade structure 2 driving grease chamber structure 6 start power head structures 7, therefore when reaching torque settings, because the resistance of the line shaft 70 of power head structure 7 is greater than the band rotation friction of grease chamber's structure 6 grease chamber's cylindrical shells 60, and the line shaft 70 that causes its grease chamber's cylindrical shell 60 only can dally and can't drive power head structure 7, and the action of this idle running can cause on the line shaft 70 shifting part 75 to stir, cause 61 spaces, grease chamber to change and produce pressure and push hydraulic oil 62, make hydraulic oil 62 enter the oil circuit 65 of end block 66 through oilhole 64 and oil circuit pipe 80 fuel feed holes 83 of adjusting structure 8 and oily passage 84, further see through pushing block 67 and promote the top fixed pawl 28 at blade structure 2 flabellum axostylus axostyles 24 centers, make top fixed pawl 28 pushing and pressing hold steel ball 36 to break away from seal 35 in addition, allow the gases at high pressure that enter by first flow 19, can be by stop structure 5 pistons 50 runners 52 through locating part 30 containing holes 34, and cross steel ball 36 and discharge by main body 10 and first air leakage hole 38 of locating part 30, form first section self-relieving action;

Then, the piston 50 of stop structure 5 can be because of imbalance of pressure in the base 16, and make piston 50 close to steel ball 36, allow the tap hole 53 suitable corresponding main bodys 10 on the piston 50 discharge with second air leakage hole 39 of locating part 30, form second section self-relieving action, and connect clinching structure 4[as shown in Figure 3 by seeing through air guide runner 100 by second air leakage hole 39], discharge by the steam vent 400 importing main bodys 10 air pressure outlet 17 of cylindrical shell 40; Connect flow channel 33[such as Fig. 3 A again or directly], make the exhaust of second stage cooperate 4 exhausts of clinching structure, discharge by main body 10 air pressure outlet 17, make piston 50 be adjacent to seal 54 on the locating part 30 simultaneously, gases at high pressure can't enter blade structure 2 via air pressure runner 31 again, automatically stop the purpose that blade structure 2 rotates and reach, to avoid air tool pressure to renew and continuing spinning, can reduce the phenomenon that gas instrument spare part damages, further effectively prolong air tool service life, its maintenance cost can be significantly reduced, and competitiveness of product and economic benefit can be promoted.

In sum, be appreciated that the utility model is the splendid creation of an intention, can significantly promote effect, and in identical technical field, do not see identical or approximate product creation or public use, the enhancement that has effect simultaneously is so the utility model has met the important document of patent of invention about " novelty " and " progressive ".

Claims

1. An automatic stop device for pneumatic tools, characterized in that it includes:

A main body, which has a grip part and a buckle structure, and an air pressure inlet is formed on the grip part, and the buckle structure can control high-pressure gas to enter the main body from the pressure inlet;

A fan blade structure, which is set in the main body, is driven forward and reverse by introducing high-pressure gas through the buckle structure;

An oil chamber structure, which is located at the front end of the fan blade structure in the main body, for the synchronous action of the fan blades, and the internal volume is provided with hydraulic oil;

A power head structure, which is installed inside the oil chamber structure, so that the oil chamber structure can be actuated by the friction force of the hydraulic oil, and the end of the power head structure passes through the main body to be connected to the tool head;

A stop structure, which is located at the rear end of the fan blade structure of the main body, has a stopper, and a holding hole for setting steel balls is formed in the center of the stopper, and a first overflow is formed at the two ends of the corresponding steel balls respectively on the main body. The air hole and a second overflow hole, and a push rod that pushes against the steel ball is pierced in the fan blade structure. The other end of the push rod can be pushed by the oil chamber structure through an oil circuit when the torque reaches the set value. , and the end of the main body different from the fan blade structure is provided with a piston, which blocks high-pressure air from entering the fan blade structure, and the center of the piston forms a flow channel connecting the limit position accommodation hole and the first overflow hole of the main body, and the periphery of the piston In addition, a split hole is formed through the flow channel and communicated with the second overflow hole when the high-pressure air is blocked from entering the fan blade structure.

2 . The automatic stop device for pneumatic tools according to claim 1 , wherein a seal is provided on the inner bottom of the accommodating hole of the stop structure, for the steel ball to abut against the seal to produce an airtight effect.

3. The automatic stop device for pneumatic tools according to claim 1 or 2, characterized in that an elastic member is provided between the steel ball and the piston of the stop structure to ensure the positioning of the steel ball.

4. The automatic stop device for pneumatic tools according to claim 1 or 2, characterized in that, there is formed in the main body a guide flow channel connected to the second overflow hole, and the guide flow channel is connected to the buckle structure, so that The high-pressure air exhausted in the second stage can be discharged from the air pressure outlet of the main body.

5. The automatic stop device for pneumatic tools according to claim 1 or 2, characterized in that, there is formed in the main body a guiding flow channel connected to the second overflow hole, and the guiding flow channel is directly connected to the outlet flow of the main body Road, so that the high-pressure air exhausted in the second stage can be discharged from the air outlet of the main body.

6. The automatic stop device for pneumatic tools according to claim 1, characterized in that, the oil chamber structure is provided with a hollow oil chamber cylinder in the main body, and the hydraulic oil fills the oil chamber cylinder and the power head structure Furthermore, there is an accommodating groove extending axially along the outer periphery of the cylinder of the oil chamber. The accommodating groove has oil holes communicating with the space on both sides of the cylinder of the oil chamber. A co-rotating end block is provided, and the oil passage communicates with the accommodating groove and the top check lever of the fan blade structure, and a push block that can push the top check lever is provided at the end of the oil passage.

7. The automatic stop device for pneumatic tools according to claim 1 or 6, characterized in that the oil chamber is provided with an adjustment structure to adjust the set value of the torsion force for actuating the ejector lever.

8. The automatic stop device for pneumatic tools according to claim 7, characterized in that, the adjustment structure has an oil pipe, and the oil pipe corresponds to the oil hole of the accommodating groove to form an oil holding space by a necked section, In addition, the oil pipe is formed with a radially penetrating oil inlet hole on the periphery of the necked section, and an axial oil channel connecting the oil inlet hole is formed in the center of the oil pipe, and a screw hole is formed at the front end of the oil pipe, and the screw hole A bolt is provided on the upper screw to adjust the diameter of the oil inlet hole of the oil pipe corresponding to the oil hole of the accommodating tank to adjust the set torque value.

9. The automatic stop device for pneumatic tools as claimed in claim 8, wherein the adjustment structure is formed with an adjustment hole corresponding to the bolt at the front end of the main body, so as to cooperate with the adjustment tool to extend from the adjustment hole into the rotating bolt.